HZB Newsroom

Search results for: Keyword: solar energy

  • <p>The illustration shows the changes in the structure of FASnI<sub>3</sub>:PEACl films during treatment at different temperatures.</p>
    Science Highlight
    11.05.2020
    On the road to non-toxic and stable perovskite solar cells
    The promising halide perovskite materials for solar energy conversion show high efficiencies, but this comes at a cost: The best perovskite materials incorporate toxic lead which poses a hazard to the environment. To replace lead by less toxic elements is not easy since lead-free perovskites show lower stability and poor efficiencies. Now, an international collaboration has engineered a new hybrid perovskite material with promising efficiency and stability. [...]
  • <p>At the Helmholtz Innovation Lab HySPRINT, Steve Albrecht finds the appropriate techniques to produce the world's most efficient perovskite solar cells.</p>
    Portrait
    23.04.2020
    Portrait: The athlete in the lab coat
    Steve Albrecht is researching on perovskite solar cells and holds several efficiency world records with his team. Back in his schooldays, he was going to become either a competitive gymnast or a scientist. He chose science, but the same athletic ambition still drives his research forward. [...]
  • <p>The CIGS-Pero tandem cell was realised in a typical lab size of 1 square centimeter.</p>
    Science Highlight
    14.04.2020
    Tandem solar cell world record: New branch in the NREL chart
    A special branch in the famous NREL-chart for solar cell world records refers to a newly developed tandem solar cell by HZB teams. The world-record cell combines the semiconductors perovskite and CIGS to a monolithic "two-terminal" tandem cell. Due to the thin-film technologies used, such tandem cells survive much longer in space and can even be produced on flexible films. The new tandem cell achieves a certified efficiency of 24.16 percent. [...]
  • News
    14.02.2020
    Doctoral student receives Erhard Höpfner Thesis Award
    On 11 February 2020, Max Grischek received the Erhard Höpfner Thesis Prize, worth 2000 euros, which is awarded by a jury of the Berlin Scientific Society for outstanding theses. Grischek studied at the Technische Universität Berlin and wrote his master thesis in the young investigator research group "Perovskite Tandem Solar Cells" at HZB. [...]
  • <p>Research on the EU project Sharc25 also took place in the EMIL laboratory, where thin films and materials can be analysed with X-rays from BESSY II.</p>
    News
    05.02.2020
    CIGSe thin-film solar cells: EU Sharc25 project increases efficiency
    Thin-film solar cells made of copper, indium, gallium, and selenium (CIGSe) are cost-effective to produce and now achieve efficiencies of significantly more than 20 percent. This level of performance was achieved through post-processing with alkali elements, and the procedures are suitable for industrial-scale production. Insights into the beneficial effect of these alkali treatments from the EU Sharc25 project have now been collected in an article published in Advanced Energy Materials. [...]
  • Science Highlight
    31.01.2020
    Perovskite solar cells: International consensus on ageing measurement protocols
    Experts from 51 research institutions have now agreed on the procedures for measuring the stability of perovskite solar cells and assessing their quality. The consensus statement was published in Nature Energy and is considered a milestone for the further development of this new type of solar cell on its way to industrial application. [...]
  • <p>The tandem solar cell was realized on a typical laboratory scale of one square centimeter. However, scaling up is possible.</p>
    Science Highlight
    29.01.2020
    World Record: Efficiency of perovskite silicon tandem solar cell jumps to 29.15 per cent
    In the race for ever higher efficiency levels, an HZB development team has once again pulled ahead. The groups of Steve Albrecht and Bernd Stannowski have developed a tandem solar cell made of the semiconductors perovskite and silicon, that converts 29.15 per cent of the incident light into electrical energy. This value has been officially certified by the CalLab of the Fraunhofer Institute for Solar Energy Systems (ISE) and means that surpassing the 30 per cent efficiency mark is now within reach. [...]
  • <p>Mint plants have been analysed after having grown on contaminated soil samples.</p>
    Science Highlight
    21.01.2020
    Plants absorb lead from perovskite solar cells more than expected
    Lead from metal-organic perovskite compounds can be absorbed particularly easily by plants. The bioavailability is significantly higher than that of lead from inorganic compounds as found in batteries. This is shown in a study by HZB researcher Antonio Abate with partners in China and Italy, published in Nature communications. [...]
  • <p>The graph visualizes the average temperature for Germany between 1881 and 2017; each strip stands for one year, based on the data set of the DWD.</p>
    News
    03.12.2019
    Invitation: Climate change - from knowledge to action

    Climate change and its causes are undisputed. But how do we get from knowledge to action? What can science contribute to this? On Thursday, 5.12.2019 at 17:00 Clara Mayer (Fridays for Future), Volker Quaschning (HTW Berlin and Scientists for Future), Bernd Rech (scientific director of the HZB) and Kira Vinke (Potsdam Institute for Climate Impact Research) will discuss these questions. The event takes place in the Bunsen lecture hall of WISTA in Adlershof and is open to the public. Admission is free. [...]

  • <p>The drawing illustrates the interaction of the organic methylammonium cation (CH<sub>3</sub>NH<sub>3</sub><sup>+</sup>) with the surrounding iodide ions. The shift of the iodide atoms out of the common plane with lead causes the breaking of the inversion symmetry.</p>
    Science Highlight
    13.11.2019
    Perovskite solar cells: Possible aspects of high efficiency uncovered
    Using crystallographic analyses at the Diamond Light Source (DLS) synchrotron in the United Kingdom, an HZB team has demonstrated that hybrid halide perovskites crystallise without inversion centre. Interactions between the organic molecules and adjacent iodine atoms can lead to the formation of ferroelectric domains, which, indirectly, can result in higher solar-cell efficiencies. The formation of these ferroelectric domains cannot occur in purely inorganic perovskites. [...]
  • <p>The award ceremony in the dinosaur hall of the Natural History Museum in Berlin: Governing Mayor Michael M&uuml;ller, Steve Albrecht and laudator J&uuml;rgen Mlynek.</p>
    News
    07.11.2019
    Berlin Science Award: Young Talent Award for Steve Albrecht
    On November 7, 2019, Michael Müller, Governing Mayor of Berlin and Senator for Science and Research, honoured outstanding research achievements for the twelfth time. Prof. Dr. Steve Albrecht was honoured this year with the "Nachwuchspreis" (Young Talent Award) for his research on novel tandem solar cells. Albrecht teaches as a junior professor at the Institute for High Frequency and Semiconductor System Technologies at the Technical University of Berlin and heads the research group "Perovskite Tandem Cells" at the Helmholtz-Zentrum Berlin. The Young Talent Award is given to scientists who are not older than 35 years and is endowed with 10,000 euros. [...]
  • <p>Die Energiewende und die H&uuml;rden bei ihrer Umsetzung standen im Fokus auf der Jahrestagung des Forschungsverbunds Erneuerbare Energien.</p>
    Nachricht
    23.10.2019
    Jahrestagung FVEE zu aktuellen Herausforderungen der Energiewende
    „Energy Research for Future – Forschung für die Herausforderungen der Energiewende“ ist das Motto für die Jahrestagung des ForschungsVerbunds Erneuerbare Energien am 22. und 23. Oktober 2019 im Umweltforum Berlin. Auf der Tagung zeigen die Wissenschaftlerinnen und Wissenschaftler u.a. auch aus dem HZB den dringenden Handlungsbedarf auf. Sie analysieren, wo Hemmnisse für eine schnelle Energiewende liegen und wie sie überwunden werden können. Leitplanke für alle Maßnahmen der Politik sollten die Klimaziele von Paris sein. [...]
  • <p>Dr. G&ouml;tz Schuck was awarded a poster prize at the PSCO-19</p>
    News
    11.10.2019
    Poster award for Götz Schuck
    At the 5th International Conference on Perovskite Solar Cells and Optoelectronics (PSCO-19) Dr. Götz Schuck received a prize for his poster contribution. The international conference took place from 30.09.2019 to 02.10.2019 in Lausanne, Switzerland. [...]
  • <p>Marko Jo&scaron;t was a PhD student in the HySPRINT-Lab in Steve Albrecht's group. Now he will continue his research on tandem solar cells at the university of Lubljana.</p>
    News
    09.10.2019
    Helmholtz Association promotes HZB cooperation with Slovenia on perovskite silicon tandem solar cells
    A HZB team has successfully raised funds from the “Helmholtz European Partnering Program” of the Helmholtz Association to expand cooperation with partners of the University of Ljubljana, Slovenia. The topics of the cooperation are tandem solar cells made of perovskite and silicon and, in particular, their precise characterisation. [...]
  • News
    18.09.2019
    Poster award for Maximilian Krause at the MC2019
    Maximilan Krause, master student at HZB, won a prize for the best poster at the Microscopy Conference 2019 in Berlin. He then presented his research on highly efficient chalcopyrite thin-film solar cells. [...]
  • <p>The Pero-CIGS tandem cell achieves a record efficiency of 23.26 percent.</p>
    Science Highlight
    09.09.2019
    World record for tandem perovskite-CIGS solar cell
    A team headed by Prof. Steve Albrecht from the HZB will present a new world-record tandem solar cell at EU PVSEC, the world's largest international photovoltaic and solar energy conference and exhibition, in Marseille, France on September 11, 2019. This tandem solar cell combines the semiconducting materials perovskite and CIGS and achieves a certified efficiency of 23.26 per cent. One reason for this success lies in the cell’s intermediate layer of organic molecules: they self-organise to cover even rough semiconductor surfaces. Two patents have been filed for these layers. [...]
  • Nachricht
    02.09.2019
    Stellungnahme des FVEE: Ausbaudeckel für Photovoltaik behindert erfolgreiche Klimapolitik
    Der im EEG von 2012 festgelegte Stopp der Einspeisevergütung durch den 52 GW-Deckel läuft dem erforderlichen massiven Ausbau der Photovoltaik und damit auch den deutschen Klimaschutzzielen diametral entgegen. Stattdessen sollte PV-Strom, der nicht lokal verbraucht werden kann, auch nach Erreichen von 52 GW installierter Leistung ins Netz eingespeist und vergütet werden. Der Forschungsverbund Erneuerbare Energien (FVEE) empfiehlt daher, so schnell wie möglich eine Anschlussregelung zu finden, die den für die Klimaschutzziele erforderlichen Solarausbau sichert. [...]
  • <p>Jean-Paul Kleider (co-chair conference committee; l.) congratulated Eike Gericke (r.) on his award.</p>
    News
    26.08.2019
    HZB doctoral student receives award at conference

    Eike Gericke gave a lecture at the 28th International Conference for Amorphous and Nanocrystalline Semiconductors (ICANS) which was awarded as "Best Student Talk". Gericke is a PhD student at the Institute of Nanospektroscopy at the HZB. [...]

  • <p>Prof. Dr. Christiane Becker in the clean room at HZB campus side Berlin-Adlershof.</p>
    Portrait
    05.08.2019
    FOCUS TOPIC: Catching more light in solar cells
    Christiane Becker uses microscopic structures to increase the amount of light captured in solar cells and is currently scaling up the technology for industrial application. “On top of everything else, there’s this spirit at HZB that we are working on the renewable energies of the future, and that is incredibly inspiring,” she relates in portrait. [...]
  • <p>An X-ray pulse probes the delocalization of iron 3d electrons onto adjacent ligands.</p>
    Science Highlight
    09.07.2019
    Charge transfer within transition-metal dyes analysed
    Transition-metal complexes in dye-based solar cells are responsible for converting light into electrical energy. A model of spatial charge separation within the molecule has been used to describe this conversion. However, an analysis at BESSY II shows that this description of the process is too simple. For the first time, a team there has investigated the fundamental photochemical processes around the metal atom and its ligands. The study has now been published in “Angewandte Chemie, international Edition” and is displayed on the cover. [...]
  • <p>The Physical Society of Berlin is awarding the Karl-scheel-Prize to Steve Albrecht.</p>
    News
    28.06.2019
    Steve Albrecht wins the 2019 Karl Scheel Prize
    This year's Karl Scheel Prize from the Physikalische Gesellschaft zu Berlin honours Steve Albrecht of the Helmholtz-Zentrum Berlin für Materialien und Energie for his work in the field of highly efficient tandem solar cell absorbers made of metal-halide perovskites. [...]
  • News
    05.06.2019
    Photovoltaics are growing faster than expected in the global energy system
    Dramatic cost reductions and the rapid expansion of production capacities make photovoltaics one of the most attractive technologies for a global energy turnaround. Not only the electricity sector, but also transport, heating, industry and chemical processes will in future be supplied primarily by solar power, because it is already the cheapest form of electricity generation in large parts of the world. This is where opportunities and challenges lie - at the level of the energy system as well as for research and industry. Leading international photovoltaic researchers from the Global Alliance for Solar Energy Research Institutes describe the cornerstones of future developments in an article published in the journal "Science" on 31 May. [...]
  • News
    04.06.2019
    Development of a miniaturised EPR spectrometer
    Several research institutions are developing a miniaturized electron paramagnetic resonance (EPR) device with industrial partner Bruker to investigate semiconductor materials, solar cells, catalysts and electrodes for fuel cells and batteries. The Federal Ministry of Education and Research (BMBF) is funding the "EPR-on-a-Chip" or EPRoC project with 6.7 million euros. On June 3, 2019, the kick-off meeting took place at the Helmholtz-Zentrum Berlin. [...]
  • <p>Jakob Bombsch received an award for his poster on CIGSe absorbers at the spring meeting of the Materials Research Society.</p>
    News
    24.05.2019
    HZB-Doktorand receives poster award
    At the spring meeting of the Materials Research Society, Jakob Bombsch received an award for his poster on CIGSe absorbers for thin-film photovoltaics. Bombsch is a researcher in the department for Interface Design headed by Prof. Marcus Bär.  [...]
  • <p>The idea: during summer, a module with photovoltaic and catalytic materials is splitting molten ice into hydrogen (H<sub>2</sub>) and oxygen. The H<sub>2</sub> is stored.</p>
    News
    22.05.2019
    Energy for Antarctica: solar hydrogen as an alternative to crude oil?
    Volkswagen Foundation funds feasibility study by HZB experts in artificial photosynthesis

    The sun shines at the South Pole as well – and in summer almost around the clock. Instead of supplying research stations in the Antarctic with crude oil for producing the electricity and heating they need, solar hydrogen could be produced from sunlight in summer as an alternative. Hydrogen has a high energy density, is easy to store, and can be used as fuel when needed later without polluting the environment. An intriguingly simple idea - but one that raises many questions. Matthias May (HZB) and Kira Rehfeld (Heidelberg University) now want to examine how feasible this kind of solar fuel generation might be in Antarctica. The project is receiving financial support from the Volkswagen Foundation. [...]

  • <p>HZB-Teams are exploring and developing new technologies for perovskite based solar cells in the innovation lab HySPRINT.</p>
    News
    16.05.2019
    LAUNCH OF EPKI: European Perovskite Initiative for the development of Perovskite based solar technology
    Perovskite based solar cells have made tremendous progress over the last decade achieving lab-scale efficiencies of 24.2% early 2019 in single-junction architecture and up to 28% in tandem (perovskite associated with crystalline silicon), turning it into the fastest-advancing solar technology to date. With the HySPRINT project and the recruitment of highly talented young scientists, Helmholtz-Zentrum Berlin has built up a considerable research capacity in the field of perovskite materials in recent years and is participating in the European Perovskite Initiative EPKI that has now been launched. [...]
  • News
    15.05.2019
    The HZB at INTERSOLAR in Munich

    The Helmholtz-Zentrum Berlin (HZB) will present itself from 15 to 17 May at INTERSOLAR in Munich, the world's largest solar trade fair. The HZB is one of the world's leading research centres in the field of solar energy and presents the latest developments in photovoltaics and solar fuels. The HZB offers a wide range of cooperation opportunities for companies - from contract research to joint research projects. [...]

  • News
    14.05.2019
    Bernd Stannowski is Professor at the Beuth University of Applied Sciences Berlin

    Prof. Dr. Bernd Stannowski has received and accepted a call for a joint S-Professorship for "Photovoltaics" at the Beuth University of Applied Sciences Berlin. The physicist heads the working group "Silicon Photovoltaics" at the Competence Center Thin Film and Nanotechnology for Photovoltaics Berlin (PVcomB) of the HZB. [...]

  • <p>A green laser pulse initially excites the electrons in the Cu<sub>2</sub>O; just fractions of a second later, a second laser pulse (UV light) probes the energy of the excited electron.</p>
    Science Highlight
    09.05.2019
    Copper oxide photocathodes: laser experiment reveals location of efficiency loss
    Solar cells and photocathodes made of copper oxide might in theory attain high efficiencies for solar energy conversion. In practice, however, large losses occur. Now a team at the HZB has been able to use a sophisticated femtosecond laser experiment to determine where these losses take place: not so much at the interfaces, but instead far more in the interior of the crystalline material. These results provide indications on how to improve copper oxide and other metal oxides for applications as energy materials. [...]
  • <p></p> <p>By co-evaporation of cesium iodide and lead iodide thin layers of CsPbI<sub>3</sub> can be produced even at moderate temperatures. An excess of cesium leads to stable perovskite phases.</p>
    Science Highlight
    29.04.2019
    Inorganic perovskite absorbers for use in thin-film solar cells
    A team at the Helmholtz-Zentrum Berlin has succeeded in producing inorganic perovskite thin films at moderate temperatures using co-evaporation – making post-tempering at high temperatures unnecessary. The process makes it much easier to produce thin-film solar cells from this material. In comparison to metal-organic hybrid perovskites, inorganic perovskites are more thermally stable. The work has been published in Advanced Energy Materials. [...]
  • <p>Frederike Lehmann earned an award for her presentation at the annual meeting of the German Society for Crystallography.</p>
    News
    11.04.2019
    PhD student of HZB earns Best Presentation Award of the Young Crystallographers
    Frederike Lehmann received a prize for her presentation at the annual conference of the German Society of Crystallography in Leipzig on 28 March 2019. She is doing her doctorate in the Department of Structure and Dynamics of Energy Materials at the HZB under Prof. Dr. Susan Schorr at the Graduate School HyPerCell. [...]
  • News
    08.04.2019
    Register now for the international summer school Quantsol
    It is already the twelfth time that the International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion (Quantsol) will be held from 1 to 8th September 2019 in Hirschegg, Kleinwalsertal, Austria. The school is organized by the Helmholtz-Zentrum Berlin and the Technical University of Ilmenau. Applications can be submitted through the school’s homepage until June 9th , 2019. [...]
  • <p>Johannes Sutter received an award for his poster on solarcells at the NIPHO19.</p>
    News
    07.03.2019
    Poster award for Johannes Sutter
    Johannes Sutter, PhD student at HZB, was awarded a poster prize at the "International Conference on Perovskite Solar Cells, Photonics and Optoelectronics (NIPHO19)". The conference took place from 25-27 February 2019 in Jerusalem. [...]
  • <p>Dr. Marcel Risch has been awarded with an ERC Starting Grant and will continue his research at HZB.</p>
    News
    01.03.2019
    Marcel Risch to form research group at the HZB with an ERC Starting Grant
    The Helmholtz-Zentrum Berlin (HZB) will be further strengthened in its research on solar fuels. Dr. Marcel Risch, who recently obtained an ERC Starting Grants, is moving from Georg August Universität, Göttingen to the HZB. Starting in March 2019, the materials physicist will set up his own research group to analyse and improve catalytic materials for water splitting. [...]
  • <p>Facade with integrated CIGS thin-film solar modules at the institute building of the ZSW in Stuttgart.</p>
    News
    28.02.2019
    Thin-film PV is key technology to drive global energy transition
    The German research institutes ZSW and HZB see huge potential in CIGS for both climate and business. CIGS thin-film PV is set to become a key pillar of the global transition towards renewable energy sources. With its high performance, low costs, small carbon footprint, and visual appearance, CIGS has some considerable advantages against other technologies, especially when it comes to highly demanding applications like buildings and vehicles. A new whitepaper compiled by ZSW and HZB describes in detail the benefits of CIGS and the huge business opportunities arising from it. [...]
  • News
    11.02.2019
    HZB to participate in two Clusters of Excellence
    Scientists at the Helmholtz-Zentrum Berlin (HZB) are researching novel systems of materials that can convert or store energy. The HZB will now also be contributing this expertise to the "MATH+" and "UniSysCat" Excellence Clusters being coordinated by Berlin universities. Over the next three years, the Helmholtz Association will fund HZB's participation under the Helmholtz Excellence Network with a total of 1.8 million euros. [...]
  • <p>New solutions are available to integrate PV into the building skin. One beautiful example is the Copenhagen International School.</p>
    News
    04.02.2019
    Towards the Climate Neutral City: Independent consulting office for integrating photovoltaics into buildings
    The Helmholtz-Zentrum Berlin is opening a national consulting office for integrating photovoltaics into buildings (BAIP) this spring. The consulting office will support building owners, architects, and municipal planners in activating building envelopes for power generation. The project is being funded by the Helmholtz Association over a period of four years as part of its knowledge transfer programme.

    [...]
  • <p>An extremely thin layer between CIGSe and Perovskite improves the efficiency of the tandemcell.</p>
    Science Highlight
    31.01.2019
    Ultra-thin and extremely efficient: Thin-film tandem cells made of perovskite and CIGSe semiconductors
    An HZB team has fabricated and characterised a thin-film tandem solar cell made of perovskite and CIGSe. They relied on a simple, robust fabrication process that is also suitable for scaling up to large surface areas. The tandem solar cell is a fully thin film device with an impressive efficiency of 21.6 %. With further improvements it might reach efficiencies above 30 %. [...]
  • <p>Marcus B&auml;r, here in EMIL lab at HZB, has accepted a professorship at FAU in South-Germany.</p>
    News
    11.01.2019
    Marcus Bär accepts W2 professorship for X-ray spectroscopy in Erlangen-Nuremberg
    Prof. Marcus Bär has accepted a professorship for X-ray spectroscopy at the Friedrich-Alexander Universität Erlangen-Nürnberg (FAU). Bär heads the Department of Interface Design at Helmholtz-Zentrum Berlin (HZB). The new W2 professorship was established in cooperation with HZB and Forschungszentrum Jülich in order to strengthen the Helmholtz-Institute Erlangen-Nürnberg für Renewable Energy (HI ERN). In the future, Bär will also be working on HI ERN research topics at HZB, thereby contributing to the intensification of cooperation. [...]
  • <p>Marko Topic, Bernd Rech, Janez Krc, Benjamin Lipovsek, Steve Albrecht, Marko Jost, Borut Pahor (f.l.t.r)</p>
    News
    19.12.2018
    Slovenian president awards HZB scientist with "Apple of Inspiration"
    Marko Jošt, Steve Albrecht and Bernd Rech, researchers at the Helmholtz-Zentrum Berlin (HZB) and the Technische Universität Berlin (TUB) receive a rare award today, 19 December 2018. In the slovenian Grand Hall of Presidential Palace, the Slovenian President, Borut Pahor, presents them with the "Apple of Inspiration". It honours achievements in culture, science, sport and society. The Berlin scientists are the first foreigners who receive the prize together with colleagues from the University of Ljubljana. [...]
  • <p>Steve Albrecht is heading the junior investigator group "Perovskit Tandem Solar Cells" at the HZB.</p>
    News
    19.12.2018
    Steve Albrecht is Junior Professor at the Technical University of Berlin
    The Technische Universität Berlin (TU) and the Helmholtz-Zentrum Berlin (HZB) have appointed Prof. Dr. Steve Albrecht to the joint junior professorship "perovskite solar cells" as of December 15, 2018. Since 2016, Albrecht has headed the junior investigator group "Perovskit Tandem Solar Cells" at the HZB, which is funded by the Federal Ministry of Education and Research.

    [...]

  • <p>With a complex combination of semiconductors and catalysts, light can be used to produce the solar fuel hydrogen.</p>
    News
    28.11.2018
    Public Lecture: “From Sunlight to Chemical Fuels: Towards a Clean Energy Future".
    On 11 December 2018, the Embassy of the Kingdom of the Netherlands in Berlin, together with the Technical University of Delft, invites you to the "Karel Luyben Lecture". Professor Dr. Roel van de Krol will give an insight into storing solar energy in solar fuels. Registration for the event is open until 4.12. [...]
  • <p>The molecule organises itself on the electrode surface until a dense, uniform monolayer is formed.</p>
    Science Highlight
    23.11.2018
    Molecules that self-assemble into monolayers for efficient perovskite solar cells
    A team at the HZB has discovered a new method for producing efficient contact layers in perovskite solar cells. It is based on molecules that organise themselves into a monolayer. The study was published in Advanced Energy Materials and appeared on the front cover of the journal. [...]
  • <p>New at HZB: DAAD MOPGA Fellow Dr. Yutsung Tsai.</p>
    News
    22.11.2018
    "Make our Planet great again": New Research Group at the HZB institute of Silicon Photovoltaics
    The physicist Dr. Yutsung Tsai is setting up his own research group on  at the Institute of Silicon Photovoltaics at Helmholtz-Zentrum Berlin. His goal is to develop two-dimensional transparent solar cells. Tsai receives research funding from the Franco-German programme "Make Our Planet Great Again – German Research Initiative“ (MOPGA-GRI), which is funded by the German Ministry or Education and Research.  [...]
  • <p>The illustration shows a molecule with an iron atom at its centre, bound to 4 CN groups and a bipyridine molecule. The highest occupied iron orbital is shown as a green-red cloud. As soon as a cyan group is present, the outer iron orbitals are observed to delocalize so that electrons are also densely present around the nitrogen atoms.</p> <p></p>
    Science Highlight
    14.11.2018
    Transition metal complexes: mixed works better
    A team at BESSY II has investigated how various iron-complex compounds process energy from incident light. They were able to show why certain compounds have the potential to convert light into electrical energy. The results are important for the development of organic solar cells. The study has now been published in the journal PCCP, and its illustration selected for the cover. [...]
  • <p>The SEM image shows the cross-section of a silicon perovskite tandem solar cell.</p>
    Science Highlight
    12.11.2018
    New records in perovskite-silicon tandem solar cells through improved light management
    Using microstructured layers, an HZB team has been able to increase the efficiency of perovskite-silicon tandem solar cells, achieving 25.5 %, which is the highest published value to date. At the same time, computational simulations were utilized to investigate light conversion in various device designs with different nanostructured surfaces. This enabled optimization of light management and detailed energy yield analyses. The study has now been published in Energy & Environmental Science. [...]
  • <p>Andriy Zakutayev (NREL), member of the jury, has awarded Fredrike Lehmann for her poster at ICTMC-21 in Boulder, Colorado, USA.</p>
    News
    19.10.2018
    Poster award to HZB doctoral student
    Frederike Lehmann from the HZB Department Structure and Dynamics of Energy Materials received a poster award at an international conference, the ICTMC-21 in Boulder, Colorado, USA. She presented her results on the synthesis and characterization of hybrid perovskite materials, which are considered interesting candidates for novel solar cells. [...]
  • <p>John Uhlrich, Editor-in-Chief at Wiley VCH presented an award to Quentin Jeangros, EPFL, and Eike K&ouml;hnen, HZB, for their outstanding posters (from left to right).  </p>
    News
    12.10.2018
    Poster award for HZB PhD student
    Eike Köhnen received an award for his poster on perovskite silicon tandem cells at the 4th International Conference on Perovskite Solar Cells and Optoelectronics (PSCO) in Lausanne, Switzerland. He is a PhD student in the Junior Research Group on Perovskite Tandem Cells led by Dr. Steve Albrecht. [...]
  • <p>Principle of a silicon singlet fission solar cell with incorporated organic crystalls<br /></p>
    Science Highlight
    02.10.2018
    HZB researchers boost the efficiency of silicon solar cells
    The efficiency of a solar cell is one of its most important parameters. It indicates what percentage of the solar energy radiated into the cell is converted into electrical energy. The theoretical limit for silicon solar cells is 29.3 percent due to physical material properties. In the journal Materials Horizons, researchers from Helmholtz-Zentrum Berlin (HZB) and international colleagues describe how this limit can be abolished. The trick: they incorporate layers of organic molecules into the solar cell. These layers utilise a quantum mechanical process known as singlet exciton fission to split certain energetic light (green and blue photons) in such a way that the electrical current of the solar cell can double in that energy range. [...]
  • <p>The computer simulation shows how the electromagnetic field is distributed in the silicon layer with hole pattern after excitation with a laser. Here, stripes with local field maxima are formed, so that quantum dots shine particularly strongly. Picture. C. Barth/HZB</p>
    Science Highlight
    28.09.2018
    Machine learning helps improving photonic applications
    Photonic nanostructures can be used for many applications, not just in solar cells, but also in optical sensors for cancer markers or other biomolecules, for example. A team at HZB using computer simulations and machine learning has now shown how the design of such nanostructures can be selectively optimised. The results are published in Communications Physics. [...]
  • <p>The nanostructure for capturing light is imprinted on silicon oxide (blue) and then "levelled" with titanium oxide (green). The result is an optically rough but smooth layer on which crystalline silicon can be grown.</p>
    Science Highlight
    17.09.2018
    Patented nanostructure for solar cells: Rough optics, smooth surface
    Thin-film solar cells made of crystalline silicon are inexpensive and achieve efficiencies of a good 14 percent. However, they could do even better if their shiny surfaces reflected less light. A team led by Prof. Christiane Becker from the Helmholtz-Zentrum Berlin (HZB) has now patented a sophisticated new solution to this problem. [...]
  • <p>Alejandra Villanueva Tovar, Pavlo Perkhun, Erin Looney, Tom Veeken, Gizem Birant, Harald Reinhold (from left) have been awarded with an HQCQ 2018. </p>
    News
    09.09.2018
    Hanwha Q-Cells Quantsol Awards 2018
    Six young researchers received a Hanwha Q-Cells Quantsol Award for their self-developed Photovoltaics. This award is presented by the organizers of the international summer school Quantsol together with the industry. [...]
  • <p>View into the new HySPRINT laboratory at HZB, where perovskit solar cells can be produced and tested. Photo: HZB/M. Setzpfandt</p>
    News
    24.08.2018
    2.8 Mio Euro Funding for preparing perovskite solar cells for high volume manufacturing
    HZB participates in a new consortium for Perovskite solar technology that is led by Oxford PV Germany GmbH. The consortium is funded by the German Ministry of Economics and Energy with 2.8 Million Euros and aims to further demonstrate the manufacturability of perovskite-silicon tandem solar cells. [...]
  • <p>The HySPRINT logo (Helmholtz Innovation Lab) printed on a copper solution symbolizes how the thinnest material layers can be produced simply and cost-effectively. Possible applications are solar cells, organic LEDs or transistors. Photo </p>
    News
    22.08.2018
    Printing solar cells and organic LEDs
    Humboldt-Universität zu Berlin and Helmholtz-Zentrum Berlin form a joint lab and research group “Generative production processes for hybrid components”. [...]
  • <p>The analysed perovskite cell has a surface of 1 cm<sup>2</sup>. Credit. Uni Potsdam</p>
    Science Highlight
    01.08.2018
    Insight into loss processes in perovskite solar cells enables efficiency improvements
    In perovskite solar cells, charge carriers are mainly lost through recombination occurring at interface defect sites. In contrast, recombination at defect sites within the perovskite layer does not limit the performance of the solar cells at present. Teams from the University of Potsdam and the Helmholtz-Zentrum Berlin (HZB) were able to reach this interesting conclusion through extremely accurate quantitative measurements on 1 cm2 perovskite cells using photoluminescence. Their results contribute to improving  perovskite solar cells and have now been published in Nature Energy. [...]
  • <p>Antonio Abate is an internationally renowned perovskite researcher. </p>
    News
    27.07.2018
    ERC Starting Grant awarded to Antonio Abate
    HZB scientist Dr. Antonio Abate has been awarded an ERC Starting Grant for his research project on perovskite solar cells. The ERC Starting Grant supports outstanding researchers in an early phase of their scientific careers with up to 1.5 million euros over five years and is considered one of the most important European awards. [...]
  • <div class="ce__subline ce__subline--black font--h7">&Uuml;bergabe der Technologieberichte an den parlamentarischen Staatssekret&auml;r Thomas Barei&szlig; (BMWi) durch Prof. Dr.-Ing. Manfred Fischedick und Dr. Peter Viebahn, (Wuppertal Institut) sowie Prof. Dr. Martin Wietschel (Fraunhofer ISI) und Juri Horst (IZES gGmbH). Quelle: Susanne Eriksson/BMWi</div>
<div class="ce__data-full"></div>
    Science Highlight
    26.07.2018
    Wissenstransfer: Neues Standardwerk zu Energietechnologien in Deutschland
    Vertreter des Wuppertal Instituts haben dem Bundesministerium für Wirtschaft und Energie (BMWi) einen mehrbändigen Bericht zu Energietechnologien übergeben. Dabei haben Experten aus dem HZB-Institut PVcomB am Themenfeld Photovoltaik mitgewirkt. Im Herbst verabschiedet die Bundesregierung das neue 7. Energieforschungsprogramm (EFP). Der Bericht liefert eine wissenschaftliche Basis für die Entwicklung des Programms. [...]
  • <p>Participants from partner institutions at the GRECO kick off in Madrid on 25. June 2018.</p>
    News
    11.07.2018
    GRECO kick-off in Madrid: advancing photovoltaics through “open science”
    The Helmholtz-Zentrum Berlin (HZB) is one of ten international partners in the GRECO pilot project funded under the European Union framework programme Horizon 2020. They intend to jointly test OpenScience approaches for exchanging knowledge and research data in order to accelerate the development of innovative PV products worldwide. GRECO will receive three million euros in funding through 2021. [...]
  • <p>Zum <a href="http://www.spektrum.de/aktion/energiewende" class="Extern">Download des Spektrum Kompakt</a></p>
    Nachricht
    05.07.2018
    Kostenloser Download: HZB-Forschung in Spektrum Kompakt
    Noch bis zum 9. Juli steht das Spektrum Kompakt "Energiewende", herausgegeben vom Spektrum-Verlag, zum kostenlosen Download zur Verfügung. Darin enthalten ist eine 13-seitige Sonderveröffentlichung des HZB, aufgeteilt in drei Beiträge. Nach Ablauf des kostenlosen Zugangs wird der Download des Hefts auf den Spektrum-Seiten 4,99 € kosten. [...]
  • <p>The transparent anti-corrosion layer contains Rhodium nanoparticles as a catalyst. Credit ACS Energy Letters.</p>
    Science Highlight
    05.07.2018
    New world record for direct solar water-splitting efficiency
    Hydrogen will play a central role as a storage medium in sustainable energy systems. An international team of researchers has now succeeded in raising the efficiency of producing hydrogen from direct solar water-splitting to a record 19 per cent. They did so by combining a tandem solar cell of III-V semiconductors with a catalyst of rhodium nanoparticles and a crystalline titanium dioxide coating. Teams from the California Institute of Technology, the University of Cambridge, Technische Universität Ilmenau, and the Fraunhofer Institute for Solar Energy Systems ISE participated in the development work. One part of the experiments took place at the Institute for Solar Fuels in the Helmholtz-Zentrum Berlin. [...]
  • <p>PhD students Hannes Hempel and Sara Niedenzu have earned awards at the E-MRS 2018.&nbsp;</p>
<p></p>
    News
    28.06.2018
    E-MRS: Prizes for two PhD students at HZB
    At the spring meeting of the European Materials Research Society from 18-22 June 2018 in Strasbourg, Hannes Hempel received the prize for the best talk and Sara Niedenzu was awarded for her poster. Both are PhD students at the MatSEC graduate school at HZB. The E-MRS spring conference is the largest materials research conference in Europe with 2,500 participants. [...]
  • Science Highlight
    22.06.2018
    Silicon heterojunction solar cell with a certified 23.1 % energy conversion efficiency
    After further optimization of the baseline process for industrial silicon heterojunction (SHJ) solar cells, the accredited metrology lab ISFH CalTeC now certified an efficiency of 23.1 % for a 4 cm² solar cell. This performance is among the best in the world and demonstrates the leading role of HZB in this technology in Germany and Europe. [...]
  • <p>Perovskite-based tandem solar cells can achieve now efficiencies better than 25%.</p>
    Science Highlight
    14.06.2018
    Perovskite-silicon solar cell research collaboration hits 25.2% efficiency
    A 1 cm2 perovskite silicon tandem solar cell achieves an independently certified efficiency of 25.2 %. This was presented this week at an international conference in Hawaii, USA. The cell was developed jointly by HZB, Oxford University and Oxford PV - The Perovskite CompanyTM. [...]
  • <p>Semi transparent PV-elements in the train station in Perpignan, France.</p>
    News
    13.06.2018
    Alliance Building Integrated Photovoltaics: Björn Rau joins Management Board
    The General Meeting of Alliance for Builiding Integrated Photovoltaics (BIPV) has unanimously elected physicist and photovoltaic expert Dr. Björn Rau, Helmholtz-Zentrum Berlin, to the BIPV Management Board. [...]
  • News
    12.06.2018
    HZB experts present cooperation opportunities at Intersolar Europe in Munich
    The international exhibition “Intersolar” brings photovoltaic research and the solar industry together. It is a perfect opportunity for researchers from Helmholtz-Zentrum Berlin to present thin-film photovoltaic technologies and projects, including for example perovskite solar cells and tandem solar cells. [...]
  • <p>Prof. Dr. Rutger Schlatmann</p>
    Nachricht
    18.05.2018
    "Tandemtechnologie" - Wie die Produktion von Solarzellen nach Europa zurückkehren könnte
    Der Direktor des PVcomB am HZB im pv-magazine Interview

    "Das Potenzial der Photovoltaik ist nicht mal annähernd ausgereizt", sagt Rutger Schlatmann im Interview. So liege der Wirkungsgrade bei kommerziellen Modulen aktuell bei zirka 20 Prozent. Mit Tandem-Solarmodulen wären bis zu 40 Prozent möglich - und sie ließen sich wahrscheinlich auch wirtschaftlich produzieren. Schlatmann zeigt die Vorteile der Dünnschicht- und der Wafer-Technologie auf und wagt eine Prognose: Welche Technologie wird das Rennen machen? Und unter welchen Bedingungen könnte die Photovoltaik-Produktion nach Deutschland zurückkehren? Lesen Sie mehr im Interview des pv magazine. [...]

  • <p>First author is the mathematician Sibylle Bergmann, whose PhD work is funded by MiCo. </p>
    Science Highlight
    17.05.2018
    Helmholtz Virtual Institute MiCo: Article selected as journal highlight for 2017
    The Helmholtz Virtual Institute MiCo offers a platform through which the Helmholtz-Zentrum Berlin conducts joint research with universities and other partners on the topic of microstructures for thin-film solar cells. The journal Modelling and Simulation in Materials Science and Engineering recently selected an article produced through MiCo as the highlight of those published by the journal during 2017. [...]
  • <p>After two years of postdoctoral research at HZB, Dr. Charles Hages has received an appointment as Assistant Professor at the University of Florida. </p>
    News
    03.05.2018
    Appointment to University of Florida
    Dr. Charles Hages has received an appointment as Assistant Professor in the Department of Chemical Engineering at the University of Florida. Hages has been a postdoctoral researcher at HZB in the Department of Structure and Dynamics of Energy Materials for two years. At University of Florida, Hages will advance his work in developing energy materials and looks forward to continued collaborations with his HZB colleagues.   [...]
  • <p>The Quantsol will be held from 2. to 9. September 2018 in Hirschegg, Kleinwalsertal, Austria.<strong><br /></strong></p>
    News
    26.04.2018
    Registration for Summer School Quantsol is now open!
    It is already the eleventh time that the International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion (Quantsol) will be held from 2. to 9. September 2018 in Hirschegg, Kleinwalsertal, Austria. The school is organized by the Helmholtz-Zentrum Berlin and the Technical University of Ilmenau. Applications can be submitted through the school’s homepage until May 18th , 2018. [...]
  • <p>More than 50 participants from Israel and Berlin initiated the international research school HI-SCORE with a kick off meeting.</p>
    News
    25.04.2018
    HI-SCORE international research school: Kick Off Meeting in Berlin
    The international research school on solar energy promotes exchange between Germany and Israel and excellent conditions for PhD students. [...]
  • <p class="Default">The picture shows the typical arrangement of cations in a kesterite type structure. In the background the crystal structure is shown, a unit cell is highlighted. </p>
    Science Highlight
    29.03.2018
    Kesterite solar cells: germanium promises better opto-electronic properties than tin
    Specific changes in the composition of kesterite-type semiconductors make it possible to improve their suitability as absorber layers in solar cells. As a team at the Helmholtz-Zentrum Berlin showed, this is particularly true for kesterites in which tin was replaced by germanium. The scientists examined the samples using neutron diffraction at BER II and other methods. The work was selected for the cover of the journal CrystEngComm. [...]
  • News
    23.03.2018
    New solar solutions for sustainable buildings and cities
    At the Interdisciplinary conference on „INNOVATION IN SOLAR BUILDING SKINS & ENERGY EFFICIENCY TOWARDS SUSTAINABLE CITIES”, 19th to 20th march in Berlin, experts from the building sector, politics, finance and photovoltaics have discussed the implementation of Building Integrated Photovoltaics (BIPV). In a very lively and active workshop, drivers and barriers were identified. [...]
  • News
    12.03.2018
    Register now: Smart City - Interdisciplinary conference on solar energy and architecture
    "INNOVATION IN SOLAR BUILDING SKINS & ENERGY EFFICIENCY TOWARDS SUSTAINABLE CITIES" will take place in Berlin March 19th-20th.

    Experts from the construction industry, photovoltaic research field, and the financial sector will discuss innovative solutions for solar facades in combination with energy efficiency in buildings and cities in Berlin, March 19th-20th, 2018. Photovoltaics integrated into buildings represent an important component for energy-efficient cities of the future.

    Online registration is open until wednesday 14th March. Students are admitted for a reduced fee. [...]

  • <p>Benjamin Rotenberg is a guest researcher at the HZB-Institute for Solar Fuels in 2018. </p>
    News
    23.02.2018
    Guest researcher at HZB: Bessel Prize Winner Benjamin Rotenberg
    Prof. Benjamin Rotenberg has received a Friedrich Wilhelm Bessel Research Prize from the Alexander von Humboldt Foundation for 2018 and will be spending time regularly as a guest researcher at the Helmholtz-Zentrum Berlin. Rotenberg is a researcher of the Centre National de Recherche Scientifique (CNRS) and heads a research group in Sorbonne Université in Paris. He works in an interdisciplinary area spanning physics and chemistry for modelling transport processes in materials, at interfaces, and in electrolytes. [...]
  • News
    01.02.2018
    HZB launches Helmholtz International Research School in collaboration with Israel
    On 1st February 2018, the Helmholtz-Zentrum Berlin (HZB) has established the Helmholtz International Research School HI-SCORE, which will be oriented towards solar energy research. To accomplish this, HZB is collaborating with the Weizmann Institute in Rehovot, the Israeli Institute of Technology (Technion) in Haifa, and three Israeli universities as well as universities in Berlin and Potsdam. [...]
  • <p class="MsoNoSpacing">SEM-images of the different perovskite solar cell architectures, left with planar interface, right with mesoporous interface. Images are coloured: metal oxide (light blue), interface (red), perovskite (brown), hole conducting layer (dark blue), topped with contact (gold).  Scale bar is 200 nm. </p>
<p> </p>
    Science Highlight
    18.01.2018
    Perovskite solar cells: mesoporous interface mitigates the impact of defects
    The nominal cell operating life of perovskite solar cells is strongly influenced by their inner architecture.This was shown by two scientists at the Helmholtz-Zentrum Berlin and the Technical University of Munich. They combined experiments with numerical simulations in order to explain this observation. [...]
  • <p>Simplified cross-section of a perovskite solar cell: the perovskite layer does not cover the entire surface, but instead exhibits holes. The scientists could show that a protective layer is being built up which prevents short circuits.</p>
    Science Highlight
    15.01.2018
    Perovskite solar cells: perfection not required!
    Experiments at BESSY II reveal why even inhomogeneous perovskite films are highly functional  [...]
  • <p>Oxford PV &ndash; The Perovskite Company's industrial site in Brandenburg an der Havel, Germany where the company is working rapidly to transfer its advanced perovskite on silicon tandem solar cell technology to an industrial scale process.</p>
    News
    09.01.2018
    Oxford PV collaborates with HZB to move perovskite solar cells closer to commercialisation
    Perovskite solar technology leader Oxford PV collaborates with leading German research centre to support the accelerated transfer of its technology into silicon cell manufacturing lines. [...]
  • News
    11.12.2017
    Progress in solar technologies – from research to application
    EU group project presents its results: high efficiencies with less material [...]
  • <p>Backscattered electron micrograph of kesterite powder. Grey grains are attributed to CZTSe. Black background is the epoxy matrix. </p>
    Science Highlight
    07.12.2017
    Solar energy: Defects in Kesterite semiconductors studied using neutrons
    A research team at the HZB has precisely characterised for the first time the various types of defects in kesterite semiconductors. They achieved this with the help of neutron scattering at the BER II research reactor and at Oak Ridge National Laboratory in the USA. The findings point to a means of guided optimisation for kesterite solar cells. [...]
  • <p>The energy yields of CIGS modules under real world conditions can be measured on a outdoor testing platform at PVcomB.</p>
    News
    28.11.2017
    PVcomB and AVANCIS launch joint MyCIGS research project in order to improve outdoor performance of thin film CIGS solar modules
    The Competence Centre Thin-Film- and Nanotechnology for Photovoltaics Berlin (PVcomB) is contributing its expertise to improving copper-indium-gallium-sulphide (CIGS) thin-film production in the MyCIGS collaborative research project. CIGS-module manufacturer AVANCIS in Munich is coordinating this project funded by the German Federal Ministry for Economic Affairs and Energy (BMWi). The Carl von Ossietzky University of Oldenburg (Oldenburg University) and Friedrich-Alexander-Universität Erlangen-Nuremberg (FAU) are also partners in the project. [...]
  • Science Highlight
    02.11.2017
    New magazine “lichtblick” is out: Select articles can be read in English on the website
    Some artikels from our magazine lichtblick are available in English: You can find these articles here: http://hz-b.de/lichtblick-en [...]
  • News
    01.11.2017
    Approved! The EU INFINITE-CELL project
    A large EU-sponsored research project on tandem solar cells in which HZB is participating begins in November 2017. The goal is to combine thin-film semiconductors made of silicon and kesterites into especially cost-effective tandem cells having efficiencies of over 20 per cent. Several large research institutions from Europe, Morocco, the Republic of South Africa, and Belarus will be working on the project, as well as two partners from industry. [...]
  • News
    20.10.2017
    Great Interest in the HySPRINT Industry Day: Joining forces to advance perovskite solar cells
    No fewer than 70 participants attended the first Industry Day of the Helmholtz Innovation Lab HySPRINT devoted to the topic of perovskite solar cells at Helmholtz-Zentrum Berlin (HZB) on 13 October 2017. This far exceeded the expectations of the event hosts. The knowledge shared on Industry Day will serve as the basis for deepening the collaboration even further with strategically important companies in the scope of HySPRINT. [...]
  • <p>Scientists at HZB are exploring the potential of metal organic perovskites for solar cells. Here a tandem solarcell is shown that combines perovskite with silicon.</p>
    News
    15.09.2017
    Invitation to HySPRINT – Industry Day “New Frontiers in PV Research: Emerging Perovskite Semiconductors”
    On 13 October, Helmholtz-Zentrum Berlin will be hosting its first Industry Day on the topic of Perovskite Solar Cells. Following a recap of the current state of research and development and the future potential of perovskite solar cells, participants from industry will be able to give a brief presentation to show their company’s interest in the field. Intensive discussions during the Industry Day will be the starting point for future cooperation. [...]
  • <p></p>
    Science Highlight
    28.08.2017
    Solar hydrogen production by artificial leafs:
    Scientists analysed how a special treatment improves cheap metal oxide photoelectrodes [...]
  • <p>Lab tour of the perovskite synthesis facility at the HZB Institute for Silicon Photovoltaics, on the occasion of the HyPerCells Research Colloquium in May 2017. </p>
    News
    24.07.2017
    Record- efficiency solar cells realised by the HyPerCells Graduate School
    The University of Potsdam and the Helmholtz-Zentrum Berlin founded the HyPerCells Graduate School just two years ago with focus on metal halide perovskites for solar applications. Now, groups involved in the graduate school have demonstrated perovskite solar cells with record-efficiencies of over 20 percent. This confirms the graduate school is at the forefront of this research in Germany and internationally highly competitive. [...]
  • <p>Intersolar Europe is the world&rsquo;s leading exhibition for the solar industry and its partners and takes place annually at the Messe M&uuml;nchen exhibition center in Munich, Germany.</p>
<p>&copy; Solar Promotion GmbH</p>
    News
    31.05.2017
    Intersolar Europe in Munich: HZB research meets solar industry
    At the major international photovoltaics exhibition from 31 May to 2 June 2017, Helmholtz-Zentrum Berlin (HZB) will be exhibiting solar energy research projects and presenting opportunities for industrial cooperation in the field of photovoltaics (PV). [...]
  • <p>The data show band gaps and efficiency levels of various perovskite materials. The efficiency levels for high band gaps fall due to undesired halide segregation effects. </p>
    Science Highlight
    30.05.2017
    Trends and pathways to high-efficiency perovskite solar cells
    Perovskite  solar cells have been the big surprise over the last while: inside of only a few years, their efficiency level has been increased from just under 10 % to fully 22 %. There has never been such rapid progress in a new material for solar cells. Scientists around the world are therefore working on this new class of materials. Eva Unger and Steve Albrecht from Helmholtz-Zentrum Berlin (HZB) have evaluated trends in the advancement of perovskite materials in an invited review article in Journal of Materials Chemistry A. They point out what opportunities exist for advancing this class of materials, combining them with other semiconductors, and where limitations lie.  [...]
  • <p>Learning about solar fuels and photovoltaics goes green. The summerschool takes place from 3. to 10. september 2017 in the idyllic Kleinwalsertal, Austria. </p>
    News
    24.04.2017
    Registration open for Quantsol Summer School
    Newcomers and young scientists in solar energy research can register now for the 10. International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion (Quantsol). The school is organized by the Helmholtz-Zentrum Berlin and the Technical University of Ilmenau and will be held from 3. to 10. September 2017 in Hirschegg, Kleinwalsertal, Austria. Applications can be submitted through the school’s homepage until May 21st, 2017. [...]
  • News
    07.04.2017
    CIGS Thin-film Solar Modules: HZB invites for workshop
    Global demand for photovoltaic systems is rising sharply. CIGS thin-film modules have become a hot topic for the solar industry. International experts will convene in Stuttgart on May 30, 2017, at the annual IW-CIGSTech workshop to discuss past and potential future technical and industrial advances in this solar technology. The Centre for Solar Energy and Hydrogen Research (ZSW) and the Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) are hosting the eighth installment of this workshop, which caters to scientists, engineers and industry specialists. [...]
  • <p>Dr. Eva Unger leads the Young Investigator Group Hy-Per-FORME. </p>
    News
    17.03.2017
    Young investigator group at HZB: Scaling perovskite cells
    The new Young Investigator Group Hy-Per-FORME led by Dr. Eva Unger is working on scaling all processing steps to enable manufacturing of perovskite solar cells on larger areas, thus brigding he gap between lab and industry. [...]
  • <p>Nanostructures trap the light, shows this illustration on the cover in  Advanced Optical Materials. </p>
    Science Highlight
    14.03.2017
    How to increase efficiencies of ultrathin CIGSe solar cells
    Nanoparticles at the back help harvesting the light. [...]
  • <p>Alex Redinger receives two million euros in funding from the Luxembourg National Research Fund for expanding his research into solar cells materials at the university Luxembourg.</p>
    News
    08.02.2017
    Dr. Alex Redinger receives assistant professorship at the University of Luxembourg
    Alex Redinger will be receiving two million euros in funding from the Luxembourg National Research Fund for expanding his research into solar cells materials. This is combined with an assistant professorship at the University of Luxembourg with the possibility of tenure. Redinger works as a postdoc in the “Structure and Dynamics of Energy Materials” department. [...]
  • <p>Scientists from all participating organisations together with the project officers from FCH2 JU met in January 2017 to start off the project.</p>
    News
    30.01.2017
    Solar based hydrogen generation: EU-project PECSYS aiming for technological breakthrough
    Development of demonstrators measuring up to ten square meters in area planned [...]
  • News
    23.01.2017
    PVcomB will help mass-produce the raw photovoltaic materials used in Wysips® technology
    Sunpartner Technologies and Helmholtz-Zentrum Berlin sign license agreement [...]
  • News
    04.01.2017
    Prof. Dr. Martina Schmid assumes the professorship of experimental physics at the University of Duisburg-Essen
    On 1 January 2017, Martina Schmid assumed the W2 professorship of “experimental physics” in the Physics department of the University of Duisburg Essen. From 2012 to the end of 2016, Martina Schmid headed the Helmholtz Young Investigator Group “Nano-Optical Concepts for Photovoltaics” at HZB. [...]
  • <p>Dr. Antonio Abate from the University of Fribourg, Switzerland, is putting together a Helmholtz Young Investigator Group at Helmholtz-Zentrum Berlin.</p>
    News
    15.12.2016
    Helmholtz-Zentrum Berlin has gained a new Helmholtz Young Investigator Group to boost its energy materials research.
    The new group is working to prolong the life span of perovskite solar cells to 25 years and longer. [...]
  • <p>Martina Schmid was awarded for her brillant presentation at PVSEC-26 in Singapore.</p>
    News
    23.11.2016
    Talk given by Martina Schmid at PVSEC-26 lauded
    PVSEC-26, one of the  largest international conferences in the field of photovoltaics, took place in Singapore at the end of October. Prof. Martina Schmid received a “Best Oral Presentation Award” for her talk in the field of New Materials and Concepts. [...]
  • <p>The funding will go towards optimising a co-evaporation process at PVcomB used for producing CIGS layers for thin-film solar cells. Photo: HZB</p>
    News
    14.11.2016
    Speeding up CIGS solar cell manufacture
    Speeding up CIGS solar cell manufacture [...]
  • <p>from left: Prof. Robert Schl&ouml;gl, Prof. Anke Kaysser-Pyzalla, Prof. Johanna Wanka, Prof. Otmar Wiestler, Dr. Jutta Koch-Unterseher, Thomas Frederking; Photo: HZB/D. Ausserhofer</p>
    News
    01.11.2016
    EMIL, a 2000-square-metre laboratory complex, has opened for research into new energy materials
    After three years of construction, the Energy Materials In-Situ Laboratory (EMIL) is now open. The new laboratory complex for researching energy materials, annexed to BESSY II in Berlin-Adlershof, was ceremonially inaugurated with the involvement of the Federal Minister of Research, Johanna Wanka, on 31 October 2016. At the new laboratory, which offers direct access to the brilliant light of the electron storage ring BESSY II, researchers are looking to synthesise and analyse materials for future renewable energy generation. Around 20 million euros were invested in the construction of the laboratory. [...]
  • <p>Participants of the Autumn School 2016.</p>
    News
    19.10.2016
    Young researchers from eleven countries attended the Autumn School of the Helmholtz virtual institute “Microstructure Control for Thin-Film Solar Cells”
    From the 9th to the 14th of October 2016, the “Autumn School on Microstructural Characterisation and Modelling of Thin-Film Solar Cells” brought together lecturers and participants from eleven different countries. In the Akademie Berlin-Schmöckwitz, 30 postgrads and postdocs discussed characterisation and simulation methods for the development of efficient thin-film solar cells. [...]
  • <p>SEM &ndash; model of a metallic nano-network with periodic arrangement ( left) and visual representation of a fractal pattern (right). </p>
    Science Highlight
    27.09.2016
    Nanotechnology for energy materials: Electrodes like leaf veins
    Nano-sized metallic wires are attracting increasing attention as conductive elements for manufacturing transparent electrodes, which are employed in solar cells and touch screen panels. In addition to high electric conductivity, excellent optical transmittance is one of the important parameters for an electrode in photovoltaic applications. An international team headed by HZB scientist Prof. Michael Giersig has recently demonstrated for these applications that networks of metallic mesh possessing fractal-like nano-features surpass other metallic networks in utility. These findings have now been published in the most recent edition of the renowned journal Nature Communications. [...]
  • <p>Cover: WILEY-VCH&nbsp;</p>
    Science Highlight
    15.09.2016
    Manual of characterisation techniques for thin-film solar cells published with the involvement of HZB researchers
    In August 2016, the second, enlarged edition of the reference book "Advanced Characterization Techniques for Thin-Film Solar Cells" appeared from renowned publisher WILEY-VCH. Co-editor is HZB researcher Dr. Daniel Abou-Ras. A total of eleven authors from HZB wrote chapters for this reference. It provides a comprehensive overview of many characterisation and modelling techniques that can be employed for solar cell materials and components. [...]
  • <p><span class="st">&nbsp;</span></p>
    News
    29.08.2016
    European project for thin film Kesterite Solar cells has reached its goals
    Eleven partners from different countries have joined forces in the EU-research project KESTCELLS from September 2012 until 31. August 2016. The mission was to train a new generation of experts and to increase the efficiencies of Kesterite solar cells. Now, at the end of the project, these goals have been perfectly reached. [...]
  • <p>Prof. Klaus Lips, Prof. Emad Aziz and Dr. Alexander Schnegg (f.l.t.r) have been awarded with adjunct professorships by Monash-University.</p>
    News
    07.07.2016
    Monash University awards three HZB-scientist with adjunct professorships
    Cooperation between Helmholtz-Zentrum Berlin (HZB) and Monash University, Melbourne, Australia, is thriving. Now, Monash University has awarded three HZB-scientists with adjunct professorships: Prof. Klaus Lips, Dr. Alexander Schnegg and Prof. Emad Aziz have been working several years already with Prof. Leone Spiccia, an internationally renowned chemist at Monash University, on energy materials science. [...]
  • <p>Opening Ceremony of the CIGSTech Workshop</p>
<p>Photo: Zentrum f&uuml;r Sonnenenergie- und Wasserstoff-Forschung Baden-W&uuml;rttemberg (ZSW)</p>
    News
    01.07.2016
    Helmholtz-Zentrum Berlin at European Photovoltaic Solar Energy Conference
    On 23rd June, Helmholtz-Zentrum Berlin and the ZSW jointly organised the IW-CIGSTech 7 as a side event of the EU-PVSEC Conference in Munich. About 150 international attendees, mainly from Europe, Asia and North America came together to get an extensive overview of the latest CIGS scientific and technological developments in CIGS thin-film solar cells and their industrial applications worldwide. [...]
  • News
    10.05.2016
    Helmholtz Innovation Labs: HySPRINT at HZB
    HZB will be setting up the new Helmholtz HySPRINT Innovation Lab for jointly developing new combinations of materials and processes in energy applications with commercial partners. Silicon and metal-organic perovskite crystals will be the centre point of the Lab’s work. The Helmholtz Association is supporting the project for the next five years with 1.9 million Euros from its Initiative and Networking Fund, with additional contributions from HZB itself as well as from industry. [...]
  • <p>EU PVSEC 2015</p>
    News
    29.04.2016
    Intersolar Europe / EU PVSEC / 7th IW-CIGSTech Workshop 2016 – Munich, 20-24 June 2016
    We cordially invite you to visit the HZB booth during Intersolar Europe - The world’s leading exhibition for the solar industry and its partners from 22 to 24 June 2016 in Munich, Germany. Also the online registration is open for the EU-PVSEC and we invite you to join the 7th IW-CIGSTech Workshop and Dinner on 23 June 2016, a joint meeting from HZB and ZSW organised as a parallel event of the EU-PVSEC. [...]
  • <p>The data (photon energies over time) show defects (lower signal) which disappear after 120 minutes. This happens at the transition from the copper-poor phase to the copper-rich one.</p>
    Science Highlight
    21.04.2016
    Thin-film solar cells: how defects appear and disappear in CIGSe-cells
    Concentration of copper plays a crucial role

    An international collaboration of German, Israeli, and British teams has investigated the deposition of thin chalcopyrite layers. They were able to observe specific defects as these formed during deposition and under what conditions they self-healed using the BESSY II X-ray source at the Helmholtz Zentrum Berlin. The results of their research provide clues to optimising fabrication processes and have now been published in Energy & Environmental Science. [...]

  • <p>Learning about solar fuels and photovoltaics goes green:  Last year&rsquo;s Quantsol students come from all over the world to meet solar energy experts in Kleinwalsertal, in the Austrian Alps. The location offers space for 56 students.</p>
    News
    14.04.2016
    Registration open: Quantsol Summer School on solar energy conversion
    Registration for Quantsol is now open! It is already the ninth time that the International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion (Quantsol) will be held in September 2016 in Hirschegg, Kleinwalsertal, Austria. The school is organized by the Helmholtz-Zentrum Berlin and the Technical University of Ilmenau. Applications can be submitted through the school’s homepage until May 31st, 2016. [...]
  • <p>Illustration of the initial charge transfer step in a dye sensitized solar cell. A photon from the sun is absorbed and excites the dye molecule. Subsequently, an electron can is injected into the ZnO-Layer where it can be trapped by so called interface-states. </p>
    Science Highlight
    13.04.2016
    Riddle of missing efficiency in zinc oxide-based dye-sensitised solar cells solved.
    To convert solar energy into electricity or solar fuels, you need specialised systems of materials such as those consisting of organic and inorganic thin films. Processes at the junction of these films play a decisive role in converting the solar energy. Now a team at HZB headed by Prof. Emad Aziz has used ultra-short laser pulses and observed for the first time directly how boundary states form between the organic dye molecules and a zinc-oxide semiconductor layer, temporarily trapping the charge carriers. This explains why zinc-oxide (ZnO) dye-sensitised solar cells have not yet met expectations. The results evolved from collaboration between Monash University (Australia) and Joint Lab partners Helmholtz Zentrum Berlin (HZB) and the Freie Universität Berlin (FU Berlin). They have now been published online by Nature in the open access magazine Scientific Reports. [...]
  • <p>Foto: Wista Management GmbH</p>
    Nachricht
    11.04.2016
    Veranstaltungstipp: „Battle den Horst“ – Science Slam mit HZB-Physiker am 14. April im Technologiepark Adlershof
    Der Science Slam „Battle den Horst“ geht in die nächste Runde – dieses Mal mit Beteiligung eines HZB-Kandidaten. Beim Adlershofer Science Slam am 14. April erklären Wissenschaftlerinnen und Wissenschaftler, wie effizient Solarzellen sind und wie Nanospaghetti Krebs besiegen. Sie rappen über Supraleiter und geben erste Hilfe-Tipps, um unangenehme Schweißströme zu stoppen. In nur zehn Minuten bringen die Slammer ihre Forschungsthemen auf verständliche Weise auf den Punkt. [...]
  • News
    22.03.2016
    Young scientist award for Oliver Supplie
    The Deutsche Gesellschaft für Kristallzüchtung und Kristallwachstum (DGKK) presented Oliver Supplie with the DGKK Young Scientist Award on 16 March 2016. Supplie works at the TU Ilmenau and at the HZB, and accepted the prize worth 2,500 euros during the “1st German Czechoslovak Conference on Crystal Growth”. The DGKK awarded the prize in recognition of Oliver Supplie’s outstanding work in improving our understanding of interfaces between III-V semiconductors and silicon. This is of great importance for producing high efficiency components, for example. [...]
  • <p>Preistr&auml;ger des Helmholtz-Doktorandenpreises 2015 mit Otmar D. Wiestler (Mitte), Pr&auml;sident der Helmholtz-Gemeinschaft, und Stephanie Dittmer (rechts), Bereichsleiterin Strategie/ Impuls- und Vernetzungsfonds der Helmholtz-Gemeinschaft, auf dem Neujahrsempfang 2016. Foto: Simone M. Neumann/helmholtz</p>
    Nachricht
    28.01.2016
    Matthias May mit dem Doktorandenpreis der Helmholtz-Gemeinschaft ausgezeichnet
    Dr. Matthias May erforschte in seiner Promotion am Helmholtz-Zentrum Berlin (HZB), wie man mit Sonnenlicht noch effizienter Wasser spalten und in Form von Wasserstoff speichern kann. Für seine Arbeit erhielt er am 27. Januar 2016 den mit 5.000 Euro dotierten Doktorandenpreis der Helmholtz-Gemeinschaft. May forscht seit Januar 2016 als Postdoktorand an der Universität Cambridge. [...]
  • <p>Flexible CIGS module. Photo </p>
    Science Highlight
    26.01.2016
    The solar technologies race: thin-film photovoltaics are catching up
    ZSW and HZB present current data – with new    opportunities for Europe’s solar industry [...]
  • <p>Sketch of the tandem cell. </p>
    Science Highlight
    07.01.2016
    Optimum band gap for hybrid silicon/perovskite tandem solar cell
    Tandem solar cells based on silicon and perovskites have raised high hopes for future high efficiency solar modules.  A team led by perovskite solar cell pioneer Henry Snaith at the University of Oxford has now shown, with contributions by Bernd Rech and Lars Korte of the Helmholtz-Zentrum Berlin, that an ultimate efficiency of 30% should be attainable with such tandem cells. They discovered a structurally stable perovskite composition with its band gap tuned to an optimum value of 1.75 eV. The results have been published in "Science". [...]
  • <p>Composite Raman intensity-distribution map on a polycrystalline CuInSe<sub>2</sub> thin film.</p>
    Science Highlight
    18.12.2015
    Alternative method for the representation of microstructures in polycrystalline materials
    Also Raman microspectroscopy in an optical microscope provides the means to determine local crystal orientations of polycrystalline materials over large sample areas. This method can be used alternatively to electron backscatter diffraction in a scanning electron microscope. It was shown by a team from Helmholtz-Zentrum Berlin and the Federal Institute for Materials Research and Testing (BAM) that both characterization techniques result in similar orientation distribution maps on areas of several hundreds of square micrometers. [...]
  • <p>x-ray diffraction on pure 4T, colored for chrismas reasons. </p>
    Science Highlight
    14.12.2015
    Doped organic semiconductors explored
    Organic semiconductor materials are already being employed today in solar cells and organic LEDs (OLEDs) amongst others. Until now, however, little was known about how the doping molecules are integrated into the chemical structure of organic semiconductors. The Molecular Systems Joint Research Team of the Helmholtz-Zentrum Berlin and Humboldt-Universität zu Berlin at BESSY II have now analysed this with surprising results. The molecules are not necessarily uniformly dispersed in the host lattice, as it is usual with inorganic semiconductors, but instead form what are known as co-crystallites. The doped organic semiconductor consists of a matrix of undoped crystallites in which such “mixed crystallites” are embedded. It is this very species that takes over the role as the actually doping molecule. The results were published in Nature Communications.
    [...]
  • <p>Participants of the European Workshop on Nanophotonics for Solar Energy. </p>
    News
    11.12.2015
    European Workshop on Nanophotonics for Solar Energy
    On 25 and 26 November 2015, about 40 researchers from seven European countries visited Helmholtz-Zentrum Berlin to attend the “European Workshop on Nanophotonics for Solar Energy”. [...]
  • <p>On stage for the PVSEC-25 Paper Awards. Jan-Peter B&auml;cker (1. on left side) and Marc Daniel Heinemann (5. on left side).</p>
    News
    26.11.2015
    PVcomB-25 paper awards for two HZB-Contributions
    At the 25th International Photovoltaic Science & Engineering Conference (PVSEC) two papers from the HZB-Institute PVcomB have been awarded: Jan-Peter Bäcker and Marc Daniel Heinemann received the PVSEC-25 Paper Award for their research on chalcogenide solar cells (CIGS). The PVSEC was held from 15. to 20. November in Busan, Korea. [...]
  • News
    19.11.2015
    Distinguished Lectures at HZB: Prof. T. Krauss will talk about Photovoltaics and Photonic nanostructures
    Solar power has the highest potential among all renewable energy sources, it is clean and practically inexhaustible. Despite the already very high performance of silicon solar cells with 25% efficiency and low costs, a lot of research is yet required in order to realise the vision of a solar-powered society. Can we reduce module cost by integrating solar cells into buildings? Can we improve efficiency without increasing cost, by adding low-cost materials such as perovskites? What role can photonic nanostructures play to help control the flow of light? [...]
  • News
    10.11.2015
    Uppsala Berlin Joint Laboratory “Our willingness to cooperate is our strength”
    Great political interest for the new Uppsala Berlin Joint Laboratory (UBjL): On the 4th of November, Sweden’s ambassador in Germany, Dr. Lars Danielsson, came personally to the HZB where the UBjL is established for the inauguration of the joint project. [...]
  • Nachricht
    02.11.2015
    Helmholtz-Zentrum Berlin auf der Jahrestagung des Forschungsverbunds Erneuerbare Energie (FVEE)
    Vom 3. Bis 4. November 2015 findet die Jahrestagung des Forschungsverbunds Erneuerbare Energie (FVEE) im Umweltforum Berlin in Berlin statt. Schwerpunktthema ist in diesem Jahr die Wärmewende. Das Helmholtz-Zentrum Berlin ist mit einem Infostand und Vorträgen präsent. [...]
  • <p>A cross section through the tandem cell is shown by this SEM-image. </p>
    Science Highlight
    28.10.2015
    Monolithic perovskite/silicon tandem solar cell achieves record efficiency
    Teams from the Helmholtz-Zentrum Berlin and École Polytechnique Fédérale de Lausanne, Switzerland, have been the first to successfully combine a silicon heterojunction solar cell with a perovskite solar cell monolithically into a tandem device. The hybrid tandem cell showed an efficiency of 18 per cent. That is the highest currently reported value for this type of device architecture. There are even prospects for the efficiency to reach as much as 30 per cent. [...]
  • <p>Simone Raoux is a professor at the Department of Physics at HU Berlin and is happy to show students the workings of BESSY II.</p>
    News
    19.10.2015
    Simone Raoux becomes a Professor at Humboldt-Universität zu Berlin
    Prof. Dr. Simone Raoux has accepted the call to the W3-S professorship “Nanospectroscopy for Design and Optimisation of Energy-Related Materials” in the Department of Physics at Humboldt-Universität zu Berlin. The professorship is associated with heading the institute of the same name at the Helmholtz-Zentrum Berlin für Materialien und Energie. Prof. Raoux accepted the call in September 2015. [...]
  • <p>The SiO<sub>2</sub> nanoparticles (black) have been imprinted directly on the Molybdenum substrate (purple) which corresponds to the back contact of the solar cell. On top of this structured substrate the ultrathin CIGSe layer (red) was grown at HZB, and subsequently all the other layers and contacts needed for the solar cell. Since all layers are extremely thin, even the top layer is showing deformations according to the pattern of the nanoparticles.  </p>
    Science Highlight
    15.10.2015
    Scientists demonstrate how to improve ultrathin CIGSe solar cells by nanoparticles
    CIGSe solar cells  are made of a thin chalcopyrite layer consisting of Copper, Indium, Gallium and Selenium and can reach high efficiencies. Since Indium is becoming scarce and expensive, it is interesting to reduce the active CIGSe layer, which however decreases the efficiency quite strongly.  Now, scientists at Helmholtz-Zentrum Berlin have produced high quality ultrathin CIGSe layers and increased their efficiency by an array of tiny nanoparticles between the back contact and the active layer. [...]
  • <p>Prof. Martha Lux-Steiner has been awarded by the European Association for Renewable Energy (EUROSOLAR) for her work and involvement in research and education with the German Solar Prize. </p>
    News
    13.10.2015
    German Solar Prize for scientist for Martha Lux-Steiner
    Renowned physicist Prof. Martha Lux-Steiner, a scientist at Helmholtz-Zentrum Berlin and Freie Universität Berlin, has received the German Solar Prize for 2015. The European Association for Renewable Energy (EUROSOLAR) recognised her lifetime of work and involvement in research and education with the award. [...]
  • <p>The perovskite film (black, 200-300 nm) is covered by Spiro.OMeTAD, Graphene with gold contact at one edge, a glass substrate and an amorphous/crystalline silicon solar cell. </p>
    Science Highlight
    02.10.2015
    Graphene as a front contact for silicon-perovskite tandem solar cells
    HZB team develops elegant process for coating fragile perovskite layers with graphene for the first time. Subsequent measurements show that the graphene layer is an ideal front contact in several respects. [...]
  • <p><strong>Lernen mit Blick auf die Alpen:</strong> 53 Teilnehmende aus aller Welt lernten bei der Quantsol-Sommerschule Grundlagen der Photovoltaik und solaren Brennstofferzeugung. Foto: HZB</p>
    Nachricht
    30.09.2015
    Quantsol Sommerschule 2015 – erfolgreich im 8. Jahr
    Die International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion (Quantsol) fand vom 6. bis 13. September 2015 zum achten Mal in Folge im österreichischen Hirschegg/Kleinwalsertal statt. Über 50 angehende Solarforscherinnen und -forschern aus 19 Ländern besuchten die Veranstaltung. [...]
  • <p>2.500 experts on photovoltaics from all over the world met at the 31th EU PVSEC in Hamburg. </p>
    News
    29.09.2015
    Helmholtz-Zentrum Berlin successfully at international Photovoltaic Conference in Hamburg
    From 14. to 18. September more than 2.500 experts on photovoltaics from all over the world met at the 31th EU PVSEC in Hamburg to discuss the latest developments and innovations. HZB was present at the conference with oral and poster presentations and in addition with an booth at the exibition. A joint publication by the Competence Centre for Photovoltaics (PVcomB) and Institute for Silicon Photovoltaics was chosen from 1,300 contributions under the best TOP 20 of the conference. [...]
  • <p>New efficiency record: This small device is able to convert 14 percent of the incoming solar energy into hydrogen. </p>
    Science Highlight
    15.09.2015
    Hydrogen from sunlight: new efficiency record for artificial photosynthesis
    An international team has now succeeded in considerably increasing the efficiency for direct solar water splitting. They are using a tandem solar cell whose surfaces have been selectively modified. The new record value is 14 % and thus considerably above the previous record of 12.4 % held by the National Renewable Energy Laboratory (NREL) in the USA, broken now for the first time in 17 years. Researchers from the Institute for Solar Fuels at the Helmholtz-Zentrum Berlin, TU Ilmenau, the Fraunhofer Institute for Solar Energy Systems ISE in Freiburg and the California Institute of Technology (Caltech) participated in the collaboration. The results have been published in Nature Communications. [...]
  • <p>Group picture in a beautiful landscape. </p>
    News
    14.09.2015
    ISUenergy 2015 – the 7th successful year!
    Local energy education & training for a global learning community – The International Summer University for Renewable Energy, the ISUenergy 2015, took place already for the seventh time from August to the beginning of September in Falera, Graubünden, with students from all around the world. [...]
  • <p>Sara J&auml;ckle has demonstrated the formation of a pn-heterojunction at the interface between an organic contact and n-doped silicon. Photo</p>
    Science Highlight
    17.08.2015
    Charge transport in hybrid silicon solar cells
    An HZB team headed by Prof. Silke Christiansen has made a surprising discovery about hybrid organic/inorganic solar cells. Contrary to expectations, a diode composed of the conductive organic PEDOT:PSS and an n-type silicon absorber material behaves more like a pn junction between two semiconductors than like a metal-semiconductor contact (Schottky diode). Their results have now been published in the Nature journal Scientific Reports and could point the way toward improvements in hybrid solar cells. [...]
  • <p>Manuela G&ouml;belt is evaluating SEM-images to calculate the local degree of networking. Photo: Bj&ouml;rn Hoffmann.</p>
    Science Highlight
    31.07.2015
    Transparent, electrically conductive network of encapsulated silver nanowires – a novel electrode for optoelectronics
    A team headed by Prof. Silke Christiansen has developed a transparent electrode with high electrical conductivity for solar cells and other optoelectronic components – that uses minimal amounts of material. It consists of a random network of silver nanowires that is coated with aluminium-doped zinc oxide. The novel electrode requires about 70 times less silver than conventional silver grid electrodes, but possesses comparable electrical conductivity. [...]
  • <p>X-ray spectroscopies have shown a higher chlorine concentration near the perovskite/TiO<sub>2</sub> interface than throughout the rest of the perovskite film. </p>
    Science Highlight
    10.07.2015
    Depletion and enrichment of chlorine in perovskites observed
    X-ray spectroscopy at BESSY II reveals inhomogenous distribution of chlorine in a special class of perovskite materials. The discovery could help to enhance efficiencies of perovskite thin film solar cells by controlled processing to optimize the chlorine distribution. [...]
  • <p>Sunlight activates the catalytic behavior of diamond materials, thus helping to convert carbon dioxide into fine chemicals and fuels. </p>
    News
    02.07.2015
    Green solutions with diamond materials:
    Horizon 2020 invests 3.9 million Euro in research project to convert CO2 into fuels using sunlight and diamond materials [...]
  • <p><strong>Frostige Wissenschaften:</strong> Experimente mit fl&uuml;ssigem Stickstoff</p>
    Nachricht
    11.06.2015
    Eine lange Nacht geballtes Wissen tanken
    Führungen an der Neutronenquelle, Experimente zur Energie für Groß und Klein, Licht-Show und vieles mehr [...]
  • <p>At the MRS Spring Meeting in San Francisco, Kai Neldner was awarded for his poster contribution.</p>
    News
    29.05.2015
    Poster award for MatSEC PhD student at the MRS Spring Meeting
    The poster contribution of Kai Neldner (HZB-Department Crystallography) was awarded a poster price of the Symposium "Thin-Film Compound Semiconductors" at the MRS Spring Meeting in San Francisco. Kai Neldner, a PhD student in the HZB Graduate School "Materials for Solar Energy Conversion" (MatSEC) has presented results on structural properties of Kesterites (Cu2ZnSnS4 - CZTS) in relation to its stoichiometry deviations. [...]
  • News
    27.05.2015
    Joint Lab BeJEL receives 1.4 million EUR grant
    The Berlin Joint EPR Laboratory (BeJEL) operated by HZB and Freie Universität Berlin has pulled in six of 27 subprojects within a DFG priority program to address“New Frontiers in Sensitivity for EPR Spectroscopy – from Biological Cells to Nano Materials”. [...]
  • <p>Ah Reum Jeong has completed her PhD in physics at Ewha Womans University in Seoul, Korea. She now works as a postdoc in the Hybrid Material Systems &amp; Nano-Analytics team of Dr. Marin Rusu.</p>
    News
    27.05.2015
    Poster Award for HZB-Postdoc at EMRS Spring Meeting
    During the spring meeting 2015 of the European Materials Research Society the Poster contribution of  Dr. Ah Reum Jeong (HZB-Institute for Heterogeneous Material Systems) was selected for an award.  The young scientist has presented results on electronic and structural properties in relation to chemical composition of molybdenum oxide layers, which are widely applied in photovoltaic as well as optoelectronic devices. [...]
  • <p>At the HZB Institute for Solar Fuels, also nanostructures in metal oxides are explored as efficient catalyst materials for artificial photosynthesis. </p>
    News
    12.05.2015
    Success rate 100 percent: HZB teams get third party funding for Solar Fuel projects
    Converting solar energy and storing it in form of solar fuels, is one of the great scientific and technological challenges today to enable the transition into a more sustainable future powered by renewable energies. Scientists at the HZB institute for Solar Fuels are exploring new semiconductor materials in order to develop compact, robust and economic solutions for “artificial photosynthesis”. They have submitted four research projects in collaboration with partners from universities for funding by the German Research Association (Deutsche Forschungsgemeinschaft DFG) in the Priority Programme „Fuels Produced Regeneratively Through Light-Driven Water Splitting” (SPP 1613). All four projects have now been approved for funding. [...]
  • <p>Illustration of the working principle of inkjet printing. </p>
    Science Highlight
    06.05.2015
    Inkjet printing process for Kesterite solar cells
    A research team at HZB has developed an inkjet printing technology to produce kesterite thin film absorbers (CZTSSe). Based on the inkjet-printed absorbers, solar cells with total area conversion efficiency of up to 6.4 % have been achieved. Although this is lower than the efficiency records for this material class, the inkjet printing minimizes waste and has huge advantages for industrial production. [...]
  • <p>PVcomB conducts research and technological improvement on CIGS solar cells, in close cooperation with industrial partners. </p>
    News
    04.05.2015
    New opportunities for CIGS solar cells
    Dynamic CIGS solar cell technology workshop gives rise to optimism: experts predict higher efficiencies and lean production technologies [...]
  • <p>Ultra-high vacuum system in the Energy Materials In-Situ Lab (EMIL) that will combine industry-relevant deposition tools with a suite of complementary advanced characterization methods. </p>
    News
    29.04.2015
    EU funding strengthens solar cell research at HZB
    Marcus Bär and his team are participating in two international projects being funded under the EU Horizon 2020 research programme. Both research projects are concerned with development and optimisation of high-efficiency thin-film solar cells based on chalcopyrites (“Sharc 25") and kesterites (“SWInG”). These two projects will together bring in about 900,000 EUR of additional research funding for solar cell research. [...]
  • <p>Solar Solutions, hand made by the students. And they all work. </p>
    News
    30.03.2015
    Call for Applications open: International Summer University on Energy, Falera/Switzerland
    Excellent Master, Diploma, and PhD Students from all over the world from different disciplines are invited to participate in the international summer university ISUenergy2015. The ISUenergy2015 will take place from Aug. 23rd - Sept. 4th 2015 in Falera/Switzerland. [...]
  • <p>Leading scientists presented the research programme for the two new graduate schools, HZB is organising together with HUB and UP.</p> <p></p>
    News
    30.03.2015
    New Opportunities for students in energy research:
    HZB starts two Graduate Schools with Humboldt-Universität zu Berlin and Universität Potsdam

    Friday, 27 March 2015, the start of two new graduate schools on solar energy research was celebrated at Helmholtz-Zentrum Berlin (HZB). Hybrid4Energy, the Graduate School of Hybrid Materials for Efficient Energy Generation and Information Technologies, is a joint venture of Humboldt-Universität zu Berlin (HUB) and HZB. The Graduate School HyPerCell focuses on a new type of thin film solar cells based on hybrid perovskite absorber materials and is organised by Universität Potsdam (UP) and HZB. [...]

  • <p>Learning in green surroundings: In 2014 the summer students came from all over the world to meet solar energy experts.</p>
    News
    25.03.2015
    Registration now open! Summer School Quantsol
    The International Summer School Quantsol will inform on basics in photovoltaics and solar energy conversion [...]
  • <p>Susan Schorr is Head of the Department of Crystallography.</p>
    News
    23.03.2015
    Susan Schorr named DGK Chair
    Prof. Dr. Susan Schorr was elected Chair at the German Crystallographic Society’s (DGK) recent annual conference. The conference took place from March 16-19, 2015, in Göttingen, Germany. Prior to her current appointment, Susan Schorr was head of the DGK’s National Committee. [...]
  • <p>Experimentieren mit Spa&szlig;: Die Sch&uuml;lerlabor-AG trifft sich immer donnerstags in Wannsee. Foto: HZB</p>
    Nachricht
    06.03.2015
    Eine neue Schülerlabor-AG am Helmholtz-Zentrum Berlin experimentiert zu Energiefragen im Alltag
    Wie viel Strom verbraucht ein Smartphone? Wo kommt unser Strom her? Und ist er eigentlich teuer? Das Schülerlabor des Helmholtz-Zentrum Berlin bietet am Standort Wannsee für Kinder der 5. bis 7. Klassen eine neue Arbeitsgruppe an. Immer donnerstags treffen sich zehn Mädchen und Jungen, um zu experimentieren und diesen Fragen auf den Grund zu gehen.   [...]
  • <p></p>
    News
    05.03.2015
    Workshop on “Microstructure Characterization and Modeling for Solar Cells”
    The winter workshop was held in a beautiful location at Spitzingsee (Bayern) from 22. to 26. february 2015 and organised by Helmholtz Virtual Institute "Microstructure Control for Thin-Film Solar Cells". The next winter workshop will be planned for 2017. [...]
  • <p>Kesterite f&uuml;r Solarzellen und solare Brennstoffe: Die Graduiertenschule <a href="https://www.helmholtz-berlin.de/angebote/jobskarriere/promotion/index_de.html">MatSEC </a>vereint f&auml;cher&uuml;bergreifende Experitise. Foto: HZB/Kodalle</p>
    Nachricht
    04.03.2015
    Graduiertenschule MatSEC diskutiert über Kesterite für Solarzellen
    Am 2. Februar 2015 trafen sich die Mitglieder der Graduiertenschule MatSEC auf dem Lise-Meitner-Campus des HZB zum wissenschaftlichen Austausch. In der Graduiertenschule MatSEC forschen die Promovierenden an neuartigen Materialsystemen für die solare Energieumwandlung, den Kesteriten. Das Forschungskolloquium findet halbjährlich statt und ist fester Bestandteil des Curriculums der Graduiertenschule. [...]
  • <p>Anke Kaysser-Pyzalla, Thomas Frederking, Gerhard Sagerer und Stephan Becker (v. l.) unterzeichnen den Kooperationsvertrag.Foto: Universit&auml;t Bielefeld</p>
    Nachricht
    26.02.2015
    Universität Bielefeld und HZB kooperieren zu Nanoschichten und komplexen Materialien
    Im Februar 2015 haben Uni-Rektor Professor Dr.-Ing. Gerhard Sagerer, Uni-Kanzler Dr. Stephan Becker und die Geschäftsführer des HZB, Professorin Dr.-Ing. Anke Kaysser-Pyzalla und Thomas Frederking eine Vereinbarung über die Zusammenarbeit unterschrieben. Darin heißt es: „Die Kooperation soll zur Steigerung der wissenschaftlichen Exzellenz der Partner und zur Entwicklung regionaler Kompetenznetzwerke in Forschung, Lehre und Ausbildung des wissenschaftlichen Nachwuchses beitragen.“ [...]
  • <p></p>
<p>The scanning electron microscopies (SEM) show how regularly the funnels etched in a silicon substrate are arranged (left: the line segment = 5 microns; right: 1 micron). The funnels measure about 800 nanometres in diameter above and run down to about a hundred nanometres at the tip. </p>
    Science Highlight
    24.02.2015
    Learning by eye: silicon micro-funnels increase the efficiency of solar cells
    A biological structure in mammalian eyes has inspired a team headed by Silke Christiansen to design an inorganic counterpart for use in solar cells. With the help of conventional semiconductor processes, they etched micron-sized vertical funnels shoulder-to-shoulder in a silicon substrate. Using mathematical models and experiments, they tested how these kind of funnel arrays collect incident light and conduct it to the active layer of a silicon solar cell. Their result: this arrangement of funnels increases photo absorption by about 65% in a thin-film solar cell fitted with such an array and is reflected in considerably increased solar cell efficiency, among other improved parameters. [...]
  • <p>Schon auf der Er&ouml;ffnungsveranstaltung war das HZB gut vertreten. Viele Arbeitsgruppen freuen sich nun auf die enge Zusammenarbeit im neuen Joint Lab mit den Kolleginnen und Kollegen aus der Theorie und der Simulation. Foto: Andreas Kubatzki/HZB</p>
    Nachricht
    13.02.2015
    BerOSE - Joint Lab für Modellierung von Nanooptischen Strukturen
    HZB gründet mit FU Berlin und Zuse Institut Berlin das „Berlin Joint Lab for Optical Simulations for Energy Research (BerOSE)“ [...]
  • <p>Prof. Bernd Rech (Foto: HZB) im <a href="http://www.weltderphysik.de/mediathek/podcast/" class="Extern">Interview</a> bei Welt der Physik</p>
    Nachricht
    23.01.2015
    Heute schon geforscht? Bernd Rech im Podcast von Welt der Physik
    Im wöchentlichen Podcast der Internetplattform "Welt der Physik" spricht Bernd Rech, Leiter des HZB-Instituts für Silizium-Photovoltaik und Sprecher des Helmholtz-Forschungsprogramms Erneuerbare Energien, in der Folge 177 über aktuelle Trends zum Thema Solarzellen. Er beschreibt die Vor- und Nachteile von anorganischen und organischen Solarmaterialien. Und er stellt eine der neuesten Entwicklungen aus seinem Institut vor, eine Kombination aus zwei Siliziumschichten und einem organischen Material. [...]
  • <p>The a-Si:H is deposited on a AZO-film that acts as a transparent front contact. A ITO-layer serves as rear contact. The organic sub-cell possesses a front contact made of a conductive polymer material (PEDOT) and a metallic rear contact.</p>
    Science Highlight
    12.01.2015
    Maximum efficiency, minimum materials and complexity
    Silicon-based thin-film solar cell with a supplementary organic layer can utilise infrared light as well [...]
  • <p>The new organic material is able to &ldquo;add up&rdquo; low-energy photons (red) to yield higher-energy light (blue), which can then be harvested by the solar cell. </p>
    Science Highlight
    27.11.2014
    Organic layer adds light particles
    Solar cells can only use photons with energies above a specific threshold to generate electricity. A German-Australian research collaboration has now combined solar cells with an organic material which can “add up” low-energy photons to yield higher-energy light, which can then be harvested by the solar cell. In an invited review paper published in the prestigious journal Energy & Environmental Science the scientists give an overview on the fascinating phenomenon of photonic upconversion and report new results: The organic layers show less photo-degradation than suspected and may also be used for other optoelectronics applications. [...]
  • <p>Logo der Jahrestagung FVEE 2014</p>
    Nachricht
    11.11.2014
    Jahrestagung des ForschungsVerbund Erneuerbare Energien
    Unter dem Motto „Forschung für die Energiewende – Phasenübergänge aktiv gestalten“ fand am 7. und 8. November die Jahrestagung des ForschungsVerbund Erneuerbare Energien (FVEE) im Umweltforum Berlin statt. Vertreter aus Wissenschaft und Politik referierten über den proaktiven Umgang mit den technologischen, ökonomischen sowie politisch-gesellschaftlichen Herausforderungen der Energiewende. [...]
  • <p>Das HZB beteiligt sich am Aufbau zweier Studieng&auml;nge an derT&uuml;rkisch-Deutschen Universit&auml;t in Istanbul. <a href="http://www.tau.edu.tr" class="Extern">www.tau.edu.tr</a></p>
    Nachricht
    28.10.2014
    Deutsch-Türkische Universität am HZB zu Gast
    Vizerektor und Dekan der Naturwissenschaftlichen Fakultät besuchte mehrere Institute des HZB [...]
  • <p>HZB Freigeist Fellow: Dr. Annika Bande<br />Foto: Mirko Krenzel for VolkswagenStiftung</p>
    News
    17.10.2014
    HZB Freigeist Fellow Dr. Annika Bande
    As of early October, the HZB is home to one of the Volkswagen Foundation's Freigeist Fellows: Dr. Annika Bande recently joined Prof. Dr. Emad Aziz' institute "Methods for Material Development". There she will build up her own junior research group with initially three PhD students. [...]
  • <p>The Adlershof Science Forum is encouraging exchange among scientists in Adlershof.</p>
    News
    16.10.2014
    SAVE THE DATE: Adlershofer Science Forum on 11.11.2014 with Poster Session
    Please save the date to participate on 11. November 2014 at  „Adlershof Science Forum“ (AFF) of Humboldt-Universität zu Berlin and IGAFA. The event is meant to encourage exchange and communication between scientists working at Adlershof. [...]
  • Science Highlight
    29.09.2014
    Tage der Forschung in Adlershof
    Am 25. und 26. September fanden in Adlershof die jährlichen Tage der Forschung statt. Das HZB bot rund 90 Schülerinnen und Schülern in drei unterschiedlichen Programmpunkten einen Einblick in die Welt der Forschung. [...]
  • <p>Bernd Rech will focus on renewable energy issues<strong>.<br /></strong></p>
    News
    23.09.2014
    Bernd Rech boardmember of the "work group of energy"
    Prof. Bernd Rech will speak on recent findings in thin film silicon photovoltaik research at the autumn meeting of the energy work group of the Deutsche Physikalische Gesellschaft. Rech had been elected into the board of the work group earlier this year. [...]
  • <p>Ammonium tungstate/PSS film surface:  (a) SEM picture before pyrolysis; (b &amp; c) SEM picture after pyrolysis. </p>
    Science Highlight
    01.07.2014
    Collecting light with artificial moth eyes
    Scientists at EMPA in Zürich and University of Basel have developed a photoelectrochemical cell, recreating a moth’s eye to drastically increase its light collecting efficiency. The cell is made of cheap raw materials – iron and tungsten oxide. Analyses at BESSY II have revealed which chemical processes are useful to facilitate the absorption of light. [...]
  • <p>Prof. Dr. Leone Spiccia will spent research time at HZB next spring.</p>
    News
    01.07.2014
    Australian top-chemist gains Helmholtz International Fellowship to visit HZB and HZDR
    Prof. Dr. Leone Spiccia from the Monash University Melbourne was awarded the Helmholtz International Fellowship. In addition to the prize money of €20,000 each, he is invited to conduct research at HZB in Berlin and HZDR in Dresden. At HZB he is expected in spring 2015 in the group of Prof. Dr. Emad Aziz. The award honours excellent research and supports establishing new cooperation structures with international research institutions. [...]
  • News
    03.06.2014
    Matthias May receives the Poster Prize at the Wilhelm und Else-Heraeus Seminar
    Matthias May, PhD student at the HZB Institute for Solar Fuels, was awarded a Poster Prize at the 562nd WE Heraeus Seminar “From Sunlight to Fuels” for his scientific work. From 11 to 16 May 2014, the participants of the WE Heraeus seminar concentrated intensively on the topic of “converting sunlight to hydrogen” and discussed new materials and processes for photovoltaic and (photo)catalytic applications.
    Matthias May impressively demonstrated on his poster how water acts on differently prepared surfaces of III-V compound semiconductors and what interactions occur. It is highly important to study this effect in detail because the initial reaction with water is critical in the development of suitable materials and processes for solar fuels. May prepared two different surfaces of gallium and indium phosphide and then analyzed and compared the influence of water using photoelectron spectroscopy and in-situ reflection anisotropy spectroscopy. [...]
  • <p>In den Pausen tauschten sich die Teilnehmer angeregt &uuml;ber die Vortr&auml;ge und ihre eigenen Forschungsarbeiten aus. Foto: FAU&nbsp;</p>
    Nachricht
    15.05.2014
    Das ganze Spektrum der Elektrokatalyse an einem Tag
    Am 4. April 2014 lud das Helmholtz-Institut Erlangen-Nürnberg (HI ERN) zu seiner ersten wissenschaftlichen Veranstaltung ein. Beim internationalen Symposium „Recent Achievements and Future Trends in Electrocatalysis“ präsentierten zehn führende Wissenschaftler auf dem Gebiet der “Elektrokatalyse” von hochrangigen nationalen und internationalen Forschungsstätten den rund 90 Teilnehmern ihre Forschungsarbeiten. [...]
  • <p>The optical properties of a material depend also on its nanostructure. </p>
    News
    09.05.2014
    Tailored disorder for optical applications
    HZB’s Silke Christiansen coordinates new DFG priority program  [...]
  • <p>Intensity distribution of XUV light in the slit plane. </p>
    News
    29.04.2014
    New tool for Joint Lab to investigate the chemistry of nature
    The Aziz’ team at the Joint Laboratory between Freie Universität Berlin and HZB has built a laser-based tabletop setup which generates ultrashort XUV light pulses and achieves their monochromatization by implementing special reflection zone plates, developed and produced by the team of Alexei Erko. [...]
  • <p>The topography of the sample surface can be seen here (white lines around the nano-particles) as well as the local optical excitations. The image displays several &ldquo;hot spots&rdquo; (yellow) that arise through interactions of the nanoparticles with the light and also with one another.<br /></p>
    News
    07.04.2014
    Even thinner solar cells through use of nanoparticles
    Nanostructures could enable more light to be directed into the active layer of solar cells, increasing their efficiency. Prof. Martina Schmid (HZB und Freie Univ. Berlin) has now measured how irregularly distributed silver particles influence the absorption of light. She demonstrated that nanoparticles interact with one another via their electromagnetic near-fields, so that local “hot spots” arise where light is concentrated especially strongly. [...]
  • <p>Advanced analytics for both thin film technologies with silicon as well as CIGS: Beside highly developed deposition tools, a comprehensive infrastructure was set up at PVcomB. Here, a glass substrate is loaded into a multi-chamber deposition tool where it will be deposited with only a few micrometers of silicon layers forming finally the active part a solar cell.</p>
<p>Foto: Berlin Partner f&uuml;r Wirtschaft und Technologie / Monique W&uuml;stenhagen</p>
    News
    02.04.2014
    New Thin Film Photovoltaic World Record announced on Conference in Berlin
    The 5th International Workshop on CIGS Solar Cell Technology organized bei Helmholtz-Zentrum Berlin (HZB) started with a bang. Katsumi Kushiya by the Japanese company Solar Frontier presented the approximately 100 participants a new world record conversion efficiency for thin-film-photovoltaic technologies. Their new thin-film CIGS cells can convert 20.9 percent of the incident sunlight into electrical energy beating the previous Solar Frontier- record of 19.7 percent conversion efficiency. The previous best value for all thin-film photovoltaic technologies was 20.8 percent. [...]
  • News
    19.03.2014
    The International Summer School Quantsol will inform on basics in photovoltaics and solar energy conversion
    Registration now open! For the seventh time already young solar energy researchers are invited to attend the International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion (Quantsol). The school will be held from September 7th to 14th, 2014 in Hirschegg, Kleinwalsertal, Austria. The school is organized by the Helmholtz-Zentrum Berlin together with the Technical University of Ilmenau. Application can be submitted through the school’s homepage until June 1st, 2014. [...]
  • News
    17.03.2014
    Autumn School on Microstructural Characterization and Modelling of Thin Film Solar Cells
    From November 2 ‐ 7, 2014, an Autumn school is organised as part of the Helmholtz Virtual Institute  Microstructure Control for Thin‐Film Solar Cells [...]
  • <p><em>ISU<sup>energy</sup></em> participants experimenting during a practical.</p>
    News
    06.03.2014
    International Summer University on Renewable Energies: Registration now open
    On behalf of the ISUenergy Scientific & Organising Committee it is a great pleasure to announce the 6th International Summer University on Renewable Energies and to invite your applications for this year's ISUenergy .The ISUenergy2014 will take place from Aug. 24th - Sept. 5th in Falera. [...]
  • <p>A cluster tool for the research on new classes of materials and device structures for photovoltaic and photocatalysis applications. (Source: Altatech)</p>
    News
    21.02.2014
    A new cluster tool for EMIL
    The Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) and Altatech, a subsidiary of Soitec, have launched a collaborative partnership to research and develop materials for the next generation of high-efficiency solar cells, including new classes of materials and innovative device structures for photovoltaic and photocatalysis applications. [...]
  • <p>In the initial state (left), the voids' internal surfaces are saturated with hydrogen atoms so that no defects are observed. Light-induced charge carriers (h<sup>+</sup>) destabilize atomic bonds. The breaking of atomic bonds causes defects (indicated by the vertical arrows on the right hand side), which translates to reduced solar cell efficiency.</p>
    News
    13.02.2014
    Light-induced degradation in amorphous silicon thin film solar cells
    Researchers at the Helmholtz Center Berlin (HZB) have taken a leap forward towards a deeper understanding of an undesired effect in thin film solar cells based on amorphous silicon – one that has puzzled the scientific community for the last 40 years. The researchers were able to demonstrate that tiny voids within the silicon network are partly responsible for reducing solar cell efficiency by some 10 to 15 percent as soon as you start using them. Their work has now been published in Physical Review Letters (DOI: 10.1103/PhysRevLett.112.066403). [...]
  • <p>The transformation from a layer of closely packed nanorods (top left) to a polycrystalline semiconductor thin film (top right) can be observed in by in-situ X-ray diffraction in real time. The intensities of the diffraction signals are color coded in the image at the bottom. A detailed analysis of the signals reveals that the transformation of the nanorods into kesterite crystals takes only 9 to 18 seconds.</p>
<p></p>
    News
    22.01.2014
    From a carpet of nanorods to a thin film solar cell absorber within a few seconds
    Research teams at the HZB and at the University of Limerick, Ireland, have discovered a novel solid state reaction which lets kesterite grains grow within a few seconds and at relatively low temperatures. For this reaction they exploit a transition from a metastable wurtzite compound in the form of nanorods to the more stable kesterite compound. At the EDDI Beamline at BESSY II, the scientists could observe this process in real-time when heating the sample: in a few seconds Kesterite grains formed. The size of the grains was found to depend on the heating rate. With fast heating they succeeded in producing a Kesterite thin film with near micrometer-sized crystal grains, which could be used in thin film solar cells. These findings have now been published in the journal “Nature Communications”. [...]
  • <p><span>Scanning electron microscopy of a Perovskite-solar cell: on a glass substrate (glass and FTO) highly porous titanium dioxide is deposited, which is impregnated with perovskite. This film is covered by an organic hole transporting material (HTM) and gold contact. </span></p>
    News
    21.01.2014
    Understanding a new type of solar cell
    Perovskite based solar cells are a hot topic in energy research and Science Magazine has put it on the list of Breakthroughs in 2013. In only a few years their efficiency has increased from 3 % to more than 16 %. However, a detailed explanation of the mechanisms of operation within this photovoltaic system is still lacking.  Scientists from Ecole polytechnique fédérale in Lausanne (EPFL) and of HZB-Institute for Solar Fuels have now uncovered the mechanism by which these novel light-absorbing semiconductors transfer electrons along their surface. They examined perovskite based solar cells with different architectures with time resolved spectroscopy techniques. Their results, which are now published online in Nature photonics, open the way to the design of photovoltaic converters with improved efficiency. [...]
  • A chalcopyrite thin film solar cell is normally made up of five layers (left). HZB-scientists have managed to reduce the number of steps of production and uniting the functionalities of two layers into one single layer which does not contain cadmium. Grafic: R. Klenk/HZB
    News
    18.12.2013
    HZB team develops chalcopyrite solar cells without cadmium-based buffer layer

    A single layer takes on the job of what used to be two layers, doing away with the wet chemical process. Despite a much simplified production method, efficiencies of greater than 18 percent are well within reach. [...]
  • <p>Participants of the HERCULES kickoff meeting on 21-22 November 2013 at Institut National d&rsquo;Energie Solaire (INES) in Le Bourget du Lac near Chamb&eacute;ry, France.</p>
    News
    10.12.2013
    HERCULES has started: European collaboration will pave the way to the next generation of c-Si based solar cell devices with efficiencies of 25 %
    Sixteen leading European research institutes, universities and partners from industry have joined forces in order to collaborate closely on the development of next generation of crystalline silicon based solar cells and modules. Together they proposed a concept of “High Efficiency Rear Contact solar cells and Ultra powerful moduLES” with the acronym HERCULES and received a 7 million Euro grant from the European Commission within the 7th Research Framework Programme. The project has started the 1st  of November 2013 and will finish end 2016. [...]
  • News
    09.12.2013
    Producing high performance solar cells at lower cost
    Dr. Sebastian Brückner graduates “summa cum laude” on solar cells made from III-V semiconductors [...]
  • High-Tech-Bau neben High-Tech-Bau: Das „Energy Materials In-Situ Laboratory Berlin“ (EMIL) entsteht als Anbau neben der Synchrotronlichtquelle BESSY II des HZB. Foto: HZB
    Nachricht
    26.11.2013
    Anbau an BESSY II im Rekordtempo: EMIL hat jetzt ein Dach über dem Kopf
    Das Forschungsgebäude für das neue Labor EMIL an BESSY II nimmt Form an: Am Mittwoch, 4. Dezember 2013, ab 13 Uhr feiert das „Energy Materials In-Situ Laboratory Berlin“ Richtfest. Die Zeremonie findet auf dem Wilhelm Conrad Röntgen Campus des Helmholtz-Zentrum Berlin, Albert-Einsteinstraße 15, 12489 Berlin, statt. Vertreter der Medien sind herzlich eingeladen. [...]
  • Prof. Hans-Werner Schock (3.f.l.) receives the honorary doctorate at University  of Tallinn.
    News
    08.11.2013
    Honorary doctorate for Prof. Hans-Werner Schock
    Tallinn University of Technology (TTU) has named Prof. Hans-Werner Schock recipient of an honorary doctorate in recognition of Schock’s achievements during TTU’s integration into the Western research community after the 1990 fall of the Iron Curtain. [...]
  • Graphene was deposited onto a glass substrate. The ultrathin layer is but one atomic layer thick (0.3 Angström, or 0.03 nanometers), although charge carriers are able to move about freely within this layer. This property is retained even if the graphene layer is covered with amorphous or polycrystalline silicon.
    News
    08.10.2013
    Major leap towards graphene for solar cells
    Surprising result: Graphen retains its properties even when coated with silicon [...]
  • Nachricht
    02.10.2013
    Sommeruniversität für Erneuerbare Energien
    52 junge Leute aus aller Welt haben sich vom 25. August bis 6. September mit den vielseitigen Aspekten Erneuerbarer Energien beschäftigt [...]
  • <p>World record solar cell with 44.7% efficiency, made up of four solar subcells based on III-V compound semiconductors for use in concentrator photovoltaics. &copy;Fraunhofer ISE</p>
    News
    24.09.2013
    World Record Solar Cell with 44.7% Efficiency
    With a solar cell efficiency of 44.7%, scientists around Dr. Frank Dimroth at the Fraunhofer Institute for Solar Energy Systems ISE achieved a new world record for the conversion of sunlight into electricity. They used a new solar cell structure with four solar subcells, a new procedure called wafer bonding and optical components which concentrate the sunlight (Concentrated Photovoltaics CPV). Part of the cell structure was developed at the Helmholtz Zentrum Berlin in the research group of Prof. Thomas Hannappel, (now with Technical University Ilmenau). They developed methods to prepare critical interfaces and to avoid undesirable defects. SOITEC and CEA-Leti have as well contributed to this world record. [...]
  • <p>Prof. Dr. Harry Tuller, MIT, was a guest-scientist at the institute for solar fuels.</p>
    News
    29.08.2013
    Interview with MIT-Expert Harry Tuller
    When can we hope to store solar energy in form of hydrogen with an efficient and cheap solution? What is motivating young people to get involved into science these days? And how does is come that many scientists really love to work, even after the official retirement age? Prof. Dr. Harry Tuller ist answering these questions in an interview, which you can listen here. And if you prefer to read his answers, you could download the transcript. [...]
  • Prof. Dr. Jürgen Mlynek, Katja Hessel, Dr. Wolfgang Heubisch, Joachim Herrmann, Prof. Dr. Johanna Wanka, Prof. Dr. Karl-Dieter Grüske, Prof. Dr. Harald Bolt, Prof. Dr. Achim Bachem, und Thomas Frederking
    Nachricht
    20.08.2013
    Kooperationsvertrag für Helmholtz-Institut Erlangen-Nürnberg unterzeichnet
    Die Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), das Forschungszentrum Jülich und das Helmholtz-Zentrum Berlin (HZB) gründen gemeinsam das Helmholtz-Institut Erlangen-Nürnberg für Erneuerbare Energien (HI ERN). In Anwesenheit von Bundesforschungsministerin Prof. Dr. Johanna Wanka ist heute in Nürnberg der Kooperationsvertrag zwischen den drei Partnern unterzeichnet worden. Die Helmholtz-Gemeinschaft fördert das neue Institut mit jährlich 5,5 Millionen Euro. [...]
  • Burial of the time capsule was part of the groundbreaking ceremony. Seen here are Klaus Lips, Anke Kaysser-Pyzalla, Birgit Schröder-Smeibidl, Markus Hammes, Bernd Rech, Axel Knop-Gericke (CAT project leader of the MPG's Fritz Haber Institute) and Thomas Frederking. Photo: Andreas Kubatzki/HZB
    News
    06.08.2013
    Groundbreaking for EMIL
    On Monday, August 5, 2013, a festive groundbreaking ceremony was the official  signal for the start of construction of the new BESSY II research lab EMIL. The new cutting-edge solar energy and catalysis research preparation and analysis lab "Energy Materials In-Situ Laboratory Berlin" will be a direct BESSY II add-on. The joint project by the HZB and the Max Planck Society provides a one-of-a-kind infrastructure for the interdisciplinary and industry compatible development of new materials and technologies to facilitate the energy transition. This includes new material systems for solar modules as well as storage solutions for which new kinds of catalysts are warranted. [...]
  • Nachricht
    02.08.2013
    Die Bauarbeiten beginnen: BESSY II erhält Anbau für neuen Laborkomplex
    Mit einem feierlichen Spatenstich beginnen am Montag, dem 5. August 2013 um 16:00 die Bauarbeiten für das neue Forschungslabor EMIL an BESSY II: Das „Energy Materials In-Situ Laboratory Berlin“, kurz EMIL, wird als hochmodernes  Präparations- und Analyselabor für die Solarenergie- und Katalyseforschung aufgebaut. Das Gemeinschaftsprojekt vom HZB und der Max-Planck-Gesellschaft soll eine einzigartige Infrastruktur bieten, um interdisziplinär und industriekompatibel neue Materialien und Technologien zu entwickeln, die die Energiewende ermöglichen. Dazu zählen neue Materialsysteme für Solarmodule und Speicherlösungen, für die neuartige Katalysatoren entwickelt werden müssen. [...]
  • <p>When light hits the system, an electrical potential builds up. The metal oxide layer acts as a photo anode and is the site of oxygen formation. It is connected to the solar cell by way of a conducting bridge made of graphite (black). Since only the metal oxide layer is in contact with the electrolyte, the silicon solar cell remains safe from corrosion. A platinum spiral serves as the cathode where hydrogen is formed. </p>
    News
    29.07.2013
    The best of two worlds: Solar hydrogen production breakthrough
    Using a simple solar cell and a photo anode made of a metal oxide, HZB and  TU Delft scientists have successfully stored nearly five percent of solar energy chemically in the form of hydrogen. This is a major feat as the design of the solar cell is much simpler than that of the high-efficiency triple-junction cells based on amorphous silicon or expensive III-V semiconductors that are traditionally used for this purpose. The photo anode, which is made from the metal oxide bismuth vanadate (BiVO4) to which a small amount of tungsten atoms was added, was sprayed onto a piece of conducting glass and coated with an inexpensive cobalt phosphate catalyst. “Basically, we combined the best of both worlds,” explains Prof. Dr. Roel van de Krol, head of the HZB Institute for Solar Fuels: “We start with a chemically stable, low cost metal oxide, add a really good but simple silicon-based thin film solar cell, and – voilà – we’ve just created a cost-effective, highly stable, and highly efficient solar fuel device.” [...]
  • Nachricht
    24.07.2013
    Spektakulärer Einbau
    Industrienahe Anlage zur Herstellung von Dünnschichtsolarmodulen aus Kupfer-Indium-Gallium-Sulfid/Selenid am PVcomB komplett [...]
  • <p>Polycrystalline film growth during coevaporation in real time using in situ X-ray diffraction and fluorescence analysis.</p>
    Science Highlight
    27.06.2013
    Watching solar cells grow
    For the first time, a team of researchers at the HZB led by Dr. Roland Mainz and Dr. Christian Kaufmann has managed to observe growth of high-efficiency chalcopyrite thin film solar cells in real time and to study the formation and degradation of defects that compromise efficiency. To this end, the scientists set up a novel measuring chamber at the Berlin electron storage ring BESSY II, which allows them to combine several different kinds of measuring techniques. Their results show during which process stages the growth can be accelerated and when additional time is required to reduce defects. Their work has now been published online in Advanced Energy Materials. [...]
  • <p>This complex solar cell is coated with two different catalysts and works like an "artificial leaf", using sunlight to split water and yield hydrogen gas.</p>
    News
    17.06.2013
    Polymer-coated catalyst protects "artificial leaf"
    Due to the fluctuating availability of solar energy, storage solutions are urgently needed. One option is to use the electrical energy generated inside solar cells to split water by means of electrolysis, in the process yielding hydrogen that can be used for a storable fuel. Researchers at the HZB Institute for Solar Fuels have modified so called superstrate solar cells with their highly efficient architecture in order to obtain hydrogen from water with the help of suitable catalysts. This type of cell works something like an "artificial leaf." But the solar cell rapidly corrodes when placed in the aqueous electrolyte solution. Now, Ph.D. student Diana Stellmach has found a way to prevent corrosion by embedding the catalysts in an electrically conducting polymer and then mounting them onto the solar cell's two contact surfaces, making her the first scientist in all of Europe to have come up with this solution. As a result, the cell's sensitive contacts are sealed to prevent corrosion with a stable yield of approx. 3.7 percent sunlight. [...]
  • Nachricht
    06.06.2013
    Helmholtz-Zentrum Berlin stärkt Aktivitäten zur Forschung an solaren Brennstoffen in Zusammenarbeit mit der Universität Erlangen-Nürnberg

    Gestern hat der Senat der Helmholtz-Gemeinschaft seine Zustimmung gegeben für die Ansiedlung eines neuen Helmholtz-Instituts zur Erforschung Erneuerbarer Energien in Erlangen und Nürnberg, kurz HI ERN. Das Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) ist neben dem Forschungszentrum Jülich und der Universität Erlangen und Nürnberg einer der Kooperationspartner und wird seine Expertise auf dem Gebiet der Dünnschicht-Photovoltaik in das neue Institut einbringen. [...]

  • <p>Foto: F&uuml;r das Forschungsinstitut IRESEN werden neue Geb&auml;ude errichtet. Foto: IRESEN</p>
    Nachricht
    23.05.2013
    HZB-Forscher Ahmed Ennaoui in den Vorsitz von IRESEN gewählt
    Marokko liegt im Sonnengürtel der Erde, nutzt bislang aber noch hauptsächlich importierte fossile Brennstoffe, um den Strombedarf zu decken. Doch das Land will die Forschung zu Solarenergie verstärken. Eine wichtige Rolle dabei wird das Institut IRESEN (Institut de Recherche en Energie Solaire et Energies Nouvelles) spielen, das als staatlicher Projektträger eine Forschungslandschaft in Marokko aufbauen und Industrie- und Grundlagenforschung miteinander verknüpfen soll. Nun wurde der erfahrene HZB-Solarexperte Prof. Dr. Ahmed Ennaoui in den Vorsitz des wissenschaftlichen Rats der Forschungseinrichtung IRESEN gewählt. [...]
  • Nachricht
    12.04.2013
    Materialforschung mit ultrahochempfindlicher Spektroskopie

    Neues Labor zur Erforschung biologischer Zellen und Solarzellen des Helmholtz-Zentrums Berlin und der Freien Universität Berlin in Adlershof eröffnet [...]

  • <p>D&uuml;nnschicht-Solarzellen - hier so genannte CIGS-Zellen - haben ein gro&szlig;es Entwicklungspotenzial. In den letzten Jahren erzielen Forscher immer wieder neue Wirkungsgradrekorde.</p>
    Nachricht
    05.04.2013
    In der Dünnschicht-Photovoltaik liegt enormes Potenzial - Experten für Dünnschichtsolarzellen treffen sich vom 16. bis 18. April auf der „Photovoltaics Thin-Film Week“ in Berlin
    Die Krise in der Solarbranche ist noch nicht durchgestanden. Chinesische Unternehmen dominieren mit Billigpreisen den Markt für Solarmodule, aber auch in Asien können viele Unternehmen dem Wettbewerbsdruck nicht standhalten. Einen Wettbewerbsvorteil können hiesige Solarfirmen nur durch Technologievorsprung und konsequente Innovationen erreichen. Die Dünnschicht-Photovoltaik bietet ein großes, längst noch nicht ausgeschöpftes Potenzial für kostengünstige und leistungsfähige Solarmodule. Vom 16. bis 18. April treffen sich in Berlin Experten aus aller Welt bei der „Photovotaics Thinfilm-Week“. Forscher und Fachleute aus der Industrie tauschen sich über neuste Ergebnisse aus Forschung und Entwicklung der Dünnschichtphotovoltaik aus und beraten über notwendige politische Rahmenbedingungen. [...]
  • News
    28.02.2013
    International summer school Quantsol conveys basics of photovoltaics and solar energy conversion
    For the sixth year in a row, future solar researchers are invited to attend the HZB’s International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion – Quantsol. The summer school program is scheduled for September 8th through the 15th in Hirschegg, Austria, and has been organized jointly by the Helmholtz Centre Berlin and Ilmenau Technical University. All interested parties are welcome to apply before May 26, 2013. [...]
  • News
    21.01.2013
    MIT's Prof. Tuller named new recipient of Helmholtz International Fellow Award

    World-renowned expert for solid state electrochemistry to conduct research at HZB [...]

  • Nachricht
    10.01.2013
    PD Dr. Silke Christiansen verstärkt Energieforschung

    Die Werkstoffwissenschaftlerin PD Dr. Silke Christiansen leitet ab Januar 2013 am Helmholtz-Zentrum Berlin das neue Institut „Nanoarchitekturen für die Energiewandlung“. Damit baut das HZB die Solarenergieforschung weiter aus. Für den Aufbau des Instituts steht Frau Christiansen eine zusätzliche Finanzierung durch die Helmholtz-Rekrutierungsinitiative von 600.000 Euro pro Jahr über fünf Jahre zur Verfügung. [...]

  • Der Blick ins Detail (hier in eine CIS-Dünnschicht-<br />solarzelle) hilft Forschern, die Zusammenhänge <br />innerhalb einer Solarzelle besser zu verstehen. <br />Das ist Voraussetzung für Entwicklung von <br />besseren, leistungsfähigeren Solarzellen der <br />nächsten Generation.
    Nachricht
    19.12.2012
    Virtuelles Institut „Mikrostrukturkontrolle für Dünnschichtsolarzellen“ offiziell gestartet
    Kürzlich ist das Virtuelle Institut „Mikrostrukturkontrolle für Dünnschichtsolarzellen“ (MiCoTFSC) feierlich unter Beteiligung aller Partner an den Start gegangen. Das Helmholtz-Zentrum Berlin koordiniert diese Forschungskooperation, die mit Mitteln aus dem Impuls- und Vernetzungsfonds der Helmholtz-Gemeinschaft finanziert wird. Die Sprecherin des Virtuellen Instituts, Prof. Dr. Susan Schorr (HZB), hob während des Kick-off-Meetings die Zusammensetzung des Virtuellen Instituts mit hervorragenden Forschungsgruppen hervor, die verschiedenen Kompetenzen beim Solarzellenwachstum, mikrostruktureller und optoelektronischer Charakterisierung sowie Material- und Wachstumsmodellierung mitbringen. [...]
  • Dr. Matthias Fehr im Analyselabor des Instituts für <br />Silizium-Photovoltaik: Hier untersuchte er mithilfe der <br />Magnetresonanzspektroskopie verschiedene Siliziumproben.
    Nachricht
    01.10.2012
    Matthias Fehr forscht ab Oktober als Humboldt-Stipendiat an der Universität von Kalifornien in Santa Barbara
    Der Physiker (E-I1) erhält Feodor-Lynen-Forschungsstipendium der Alexander-von-Humboldt-Stiftung  [...]
  • Solar hydrogen evolution by graphitic carbon nitride/p-type chalcopyrite<br />thin film photo-cathode: It is shown that graphitic carbon nitride films<br />coated on p-type CuGaSe2 thin films can be successfully applied as new<br />photoelectrochemical composite photo-cathode for light induced<br />hydrogen evolution.
    News
    24.09.2012
    From sunlight to hydrogen
    Scientists at the Helmholtz Zentrum Berlin successfully test new hybrid material for use in photoelectrochemical hydrogen production [...]
  • Nachricht
    12.09.2012
    Henning Döscher erhält Marie-Curie-Fellowship der Europäischen Union

    Seit August erforscht er solare Brennstoffe am National Renewable Energy Laboratory (NREL) in den USA [...]

  • Zinc oxide nano-rods as anti-reflective coating on a CIGSe solar cell.<br />©HZB
    News
    09.07.2012
    European Union allocates 10 million Euros to thin film solar cell project
    European research consortium's German partners to include Berlin's Helmholtz Centre and Free University [...]
  • <p>Has accepted the joint appointment: Rutger Schlatmann, <br />head of PVcomB, becomes professor at the <br />Hochschule f&uuml;r Technik und Wirtschaft Berlin</p>
    News
    04.07.2012
    Rutger Schlatmann becomes professor of “solar technology” at Hochschule für Technik und Wirtschaft Berlin - University of Applied Sciences
    Rutger Schlatmann has been headed the Competence Centre Thin-Film- and Nanotechnology for Photovoltaics Berlin (PVcomB) since 2008. Since its very inception, this Berlin establishment has been an instrumental link between publicly financed photovoltaic research and the solar industry. PVcomB is jointly funded by Helmholtz-Zentrum Berlin and the universities and institutes of Berlin. With this felicitous collaboration, the partners have been pursuing one goal for the last four years with success: they have been taking the results of pure research and turning them into practical technologies ready for real-world use. With the joint appointment of Rutger Schlatmann, this collaboration will now be substantially expanded.  [...]
  • <p>PVcomB sets sputter systems from Leybold Optics in operation<br />From right to left: Dr. Bernd Stannowski and Dr. Sven Ring,<br />PVcomB, Berlin<br /></p>
    News
    14.06.2012
    PVcomB sets sputter system from Leybold Optics in operation
    Berlin competence centre for photovoltaics commences full operation with small modules [...]
  • Die Postersessions waren ein wichtiger Bestandteil <br />der Symposien auf dem E-MRS Spring Meeting 2012<br />
    Nachricht
    06.06.2012
    Preis und Preis gesellt sich gern: Simon Kirner und Christiane Stephan mit Posterpreisen auf der E-MRS ausgezeichnet
    Auf der renommierten Frühjahrskonferenz der Europäischen Materialforschungsgesellschaft (E-MRS) wurden im Mai gleich zwei HZB-Nachwuchswissenschaftler für ihre Posterbeiträge ausgezeichnet. Beide Forscher beschäftigten sich mit verschiedenen Aspekten von Dünnschichtsolarzellen. Simon Kirner, Doktorand am PVcomB, zeigte in seinem Poster, wie man Tandemsolarzellen aus amorphen und kristallen Silizium mithilfe einer Zwischenschicht aus Silizium-Oxid optimieren kann. Dr. Christiane Stephan aus der Abteilung Kristallographie untersuchte Defekte in der Kristallstruktur von Cu(In,Ga)Se2, dem Absorbermaterial in hocheffizienten Chalkopyrit-Dünnschichtsolarzellen. An dem E-MRS Spring Meeting in Straßburg, die mit großer Industriebeteiligung organisiert wurde, nahmen etwa 2500 Teilnehmer teil; für die wissenschaftlichen Diskussionen gab es 25 Symposien zu verschiedenen Themenbereichen. [...]
  • Experimentieren mit schönster Kulisse: <br />Die Sommerschule ISUenergy vermittelt rund zwei Wochen lang <br />die Grundlagen der erneuerbaren Energien.
    Nachricht
    30.05.2012
    Sommerschule zu Erneuerbaren Energien in der Schweiz: Noch können Bewerbungen eingereicht werden
    Die Internationale Sommer-Universität zu Erneuerbaren Energien, ISUenergy 2012, findet vom 19.08. bis zum 31.08.2012 im Schweizerischen Falera statt. Master- und Diplomstudenten sowie Doktoranden, die teilnehmen möchten, können sich noch in den nächsten Wochen bewerben. Auf die Teilnehmer wartet ein abwechslungsreiches Programm aus Vorträgen und praktischen Übungen. Weitere Informationen zum Programm und zur Anmeldung für die Sommerschule finden Sie auf unserer Website. [...]
  • News
    24.05.2012
    Announcement - International Summer School on Photovoltaics (Quantsol)
    The International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion takes place from 9th to 16th September 2012 in Hirschegg, Kleinwalsertal, Austria. Young postdocs, PhD students, and master students can apply by 10th June 2012.Details of the school’s program can be found on the website. [...]
  • Nachricht
    19.04.2012
    “Das Rennen ist noch nicht gelaufen“

    Photovoltaics Thin-Film Week: Forschung als Chance für Solarwirtschaft [...]

  • <p>In CIS/CIGSe-Solarzellen ist die Dichte an Korngrenzen hoch.<br />HZB-Wissenschaftler konnten mit bislang unerreichter Aufl&ouml;sung<br />Atomlagen unmittelbar an den Grenzfl&auml;chen analysieren.<br />Foto: HZB</p>
    Nachricht
    26.03.2012
    Atomwanderung im Grenzgebiet: Mit bislang unerreichter Auflösung analysieren Forscher Korngrenzen in Dünnschichtsolarzellen
    Dünnschichtsolarzellen werden zukünftig einen großen Anteil am Photovoltaik-Markt haben, davon sind viele Experten überzeugt. Die Zellen aus Kupfer-Indium-Gallium-Selenid oder -Sulfid (CIGSe, CIS) unterscheiden sich in vielen Dingen von der klassischen Siliziumsolarzelle. So tragen in kristallinen Siliziumsolarzellen Korngrenzen substantiell zum Stromverlust bei. Mit CIGSe-Absorbern werden dagegen Wirkungsgrade von mehr als 20 Prozent erreicht, obwohl die polykristallinen Dünnschicht-Materialien eine hohe Dichte an Korngrenzen aufweisen. Woran das liegt, ist bislang noch ungeklärt. [...]
  • Nachricht
    02.03.2012
    Energie-Allianz Berlin-Potsdam-Jülich: Forschung verspricht völlig neue Materialien für die Photovoltaik
    Das Helmholtz-Zentrum Berlin und das Forschungszentrum Jülich bilden zusammen mit der Humboldt-Universität zu Berlin, der Universität Potsdam und der Freien Universität Berlin eine der drei neuen Energie-Allianzen, die von der Helmholtz-Gemeinschaft ins Leben gerufen wurden. Ziel dieser Energie-Allianz mit dem Namen „Anorganisch/organische Hybrid-Solarzellen und -Techniken für die Photovoltaik“ ist es, den drängenden Forschungsbedarf zum raschen Umbau der Energieversorgung gezielt zu decken. Die Vorhaben werden durch den Impuls- und Vernetzungsfonds der Helmholtz-Gemeinschaft für drei Jahre gefördert, wobei die universitären Partner zusätzlich eigene Mittel einbringen. Eine Fortsetzung der Forschung auch über die drei Jahre hinaus ist geplant. [...]
  • <p>Red light from a laser pointer is converted into higher-energy yellow<br />light as it passes through the liquid photochemical upconverter.<br />Source: University of Sydney, Australia</p>
    News
    29.02.2012
    Photochemical Turbo Power for Solar Cells
    How organic molecules make yellow light from red. [...]
  • A chalcopyrite thin-layer solar-cell at the sun-simulator test stand.<br />©HZB
    News
    27.02.2012
    ILGAR achieved efficiency record
    HZB-scientists have received simultaneous confirmation of two records in efficiency levels for CIS thin film solar-modules. [...]
  • <p>Comb-shaped, interdigitated metal contacts on the side facing<br />away from the sun of back-contact silicon heterojunction solar<br />cells. Pictured are several test cells on a single silicon wafer.<br />Image source: HZB/Jan Haschke</p>
    News
    21.02.2012
    Back-contact heterojunction solar cell by HZB and ISFH achieves record efficiency
    Independent testing lab confirms 20.2 percent [...]
  • News
    19.10.2011
    The large-scale project EMIL (Energy Materials In-situ Laboratory Berlin) will create new opportunities for researching energy materials by the beginning of 2015
    Helmholtz Zentrum Berlin and the Max Planck Society are going to build a new, dedicated X-ray beamline together at the synchrotron source BESSY II, which will be used for analysing materials for renewable energy generation. The new large-scale project has been dubbed EMIL (a common name in Berlin, but which also stands for Energy Materials In-situ Laboratory Berlin) and includes, among other things, the major project already announced under the name of SISSY (Solar Energy Materials In-Situ Spectroscopy at the Synchrotron). The assessment of EMIL in September 2011, by an external committee of experts engaged by the scientific advisory board, went very well and the experts endorsed the EMIL project "enthusiastically". The supervisory board of HZB will give the go-ahead for construction of EMIL in two months. [...]
  • Mikroskopaufnahme einer Schicht aus Kupfer-Indium-Sulfid (CIS)
    Nachricht
    17.10.2011
    Messmethoden im Vergleich: Wie dünne Schichten für Solarzellen am besten untersucht werden
    Alles Gute ist nie beisammen. In der Welt komplexer Geräte gilt dies in besonderem Maße. Will man beispielsweise einen neuen Fernseher oder ein Smartphone kaufen, nutzen deshalb viele Konsumenten vergleichende Bewertungen wie zum Beispiel von Stiftung Warentest. Sie helfen bei der Abwägung: worin unterscheiden sich die Geräte, was können sie, welche Funktionen sind besonders wichtig, worauf kann man möglicherweise verzichten. Bei der Analyse von dünnen Solarzellen-Schichten stehen Wissenschaft und Industrie vor einem ähnlichen Problem. [...]
  • Nachricht
    07.09.2011
    PVcomB kooperiert im Rahmen der Innovationsallianz Photovoltaik
    Mehrere Projekte sollen mit Industriepartnern am PVcomB umgesetzt werden  [...]
  • Nachricht
    11.08.2011
    Thomas Hannappel erhält Stiftungsprofessur „Photovoltaik“ an der TU Ilmenau
    TU Ilmenau und HZB unterzeichnen MoU für eine enge Kooperation in der Photovoltaik [...]
  • Nachricht
    08.04.2011
    Bernd Rech über Solarenergie auf Deutsche Welle TV
    Bernd Rech vom Helmholtz-Zentrum Berlin spricht auf Deutsche Welle TV über Solarenergie. "Prinzipiell scheint die Sonne in einer Stunde so viel auf die Erde, wie die Weltbevölkerung derzeit das ganze Jahr braucht. Das heißt, es ist 10.000 mal mehr. Es geht nur darum, einen kleinen Teil davon zu nutzen", sagte Prof. Bernd Rech im Interview. Wie wir diese Energie nutzen können und warum die Anwendungen bisher weniger effizient sind, erfahren Sie im Video. Der Physiker arbeitet am Institut für Silizium-Photovoltaik des Helmholtz-Zentrum Berlin für Materialien und Energie. [...]
  • Nachricht
    31.03.2011
    Leuchttürme der Photovoltaik in Berlin Adlershof

    Das Kompetenzzentrum Dünnschicht- und Nanotechnologie für Photovoltaik Berlin (PVcomB) produziert erste Solarmodule. Zugleich Baubeginn des Zentrums für Photovoltaik (ZPV). [...]

  • <p>Im PVcomB k&ouml;nnen seit November Schichten <br />mit einer Gr&ouml;&szlig;e 30 cm x 30 cm produziert werden</p>
    Nachricht
    29.03.2011
    Hochrangige Gäste kamen zur offiziellen Eröffnung des PVcomB am 30. März
    Zur Einweihungsfeier des PVcomB am 30. März haben sich hochrangige Gäste aus Politik und Wissenschaft die Klinke in die Hand geben. Georg Schütte, Staatssekretär im Bundesministerium für Bildung und Forschung, der Berliner Wissenschaftssenator Jürgen Zöllner und der Präsident der Helmholtz-Gemeinschaft, Jürgen Mlynek, haben gemeinsam mit der HZB-Geschäftsführung das Kompetenzzentrum offiziell eröffnet. [...]
  • <p>Foto: Sebastian Bolesch / BMBF</p>
    Nachricht
    17.12.2010
    Henning Döscher gewinnt Essay-Wettbewerb "Welt der Zukunft"
    Wissenschaftler können nur trockene Texte verfassen? Von wegen! Der Solarforscher Henning Döscher hat gestern dieses Vorurteil klar widerlegt: Er erzielte den ersten Preis im Essay-Wettbewerb „Welt der Zukunft ‚Energie 2050‘ “. Im Rahmen der Abschlussveranstaltung zum Wissenschaftsjahr der Energie, welches vom HZB intensiv unterstützt wurde, erhielt er gestern von Forschungsministerin Schavan die Sieger-Urkunde – und die Aussicht auf einen spannenden Preis: Döscher wird an einer Reise eines Forschungsschiffes des Alfred-Wegener-Instituts für Polar- und Meeresforschung in der Helmholtz-Gemeinschaft teilnehmen. [...]
  •  Die erste am PVcomB produzierte Silizium-Schicht<br> auf 30x30 cm2 Glas
    Nachricht
    19.11.2010
    PVcomB produziert erste Schichten
    Ein neuer Abschnitt in der Geschichte des PVcomB hat begonnen: Am 15.11. erfolgte die erste eigene Beschichtung von 30 x 30 cm2 Glasmodulen mit amorphem Silizium. Die Deposition erfolgte an einer PECVD-Clusteranlage der Firma Applied Materials, Herzstück der Forschungslinie für Dünnschicht-Silizium, die am PVcomB aufgebaut wird. [...]
  • News
    26.10.2010
    Current loss tracked down by magnetic fingerprint

    HZB researchers solve the case of lost current in organic solar cells [...]

  • Award ceremony in Valencia
    News
    16.09.2010
    Untiring dedication to solar energy
    HZB researcher honoured with solar award for his successful research [...]
  • Großflächenbeschichtung am Fraunhofer IST </br>(Reiner Meier, BFF Wittmar)
    Nachricht
    23.06.2010
    Forschung für die Dünnschichtphotovoltaik - Fraunhofer IST und HZB vereinbaren enge Zusammenarbeit
    Wie kann der Wirkungsgrad von Solarzellen weiter gesteigert werden? Wie können die Kosten gesenkt werden? Antworten auf diese und andere Fragen zur Dünnschicht-photovoltaik geben das Fraunhofer-Institut für Schicht- und Oberflächentechnik IST und das Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) künftig gemeinsam. Beide Institute wollen ihre zentralen Kompetenzen zukünftig bündeln: das Fraunhofer IST bringt sein know how zur Dünnschichttechnik ein, das HZB ist führend auf dem Gebiet der Dünnschichtphotovoltaik [...]
  • News
    11.05.2010
    Penetrable barriers – tunnelling welcome

    The boundaries between grains in certain thin-film materials are no obstacle to charge carriers. They even help prevent losses in charge transport. Researchers from Helmholtz-Zentrum Berlin obtain experi-mental evidence for a bold theory. [...]

  • Nachricht
    06.07.2009
    Warum Dünnschichtsolarzellen aus Silizium altern

    Pressemitteilung [...]

  • Nachricht
    30.06.2009
    Photovoltaik-Forschung des HZB als Weltspitze bewertet

    Im Ranking eines internationalen Wissenschafts-Verlages über Forschungsleistungen auf dem Gebiet der alternativen Energien schneidet das HZB als beste europäische Forschungseinrichtung ab und belegt weltweit den 3. Platz. [...]

  • Nachricht
    29.06.2009
    Photovoltaik-Forschung des HZB als Weltspitze bewertet
    Im Ranking eines internationalen Wissenschafts-Verlages über Forschungsleistungen auf dem Gebiet der alternativen Energien schneidet das HZB als beste europäische Forschungseinrichtung ab und belegt weltweit den 3. Platz. [...]
  • Nachricht
    20.05.2009
    Millionen für die Solarenergie in Berlin-Adlershof - Bund fördert den Technologietransfer und Ausbildung in der Dünnschicht-Photovoltaik

    Ein Verbundprojekt von Forschungsinstituten und Hochschulen aus Berlin und Brandenburg hat den Zuschlag für die Förderung im Rahmen des Programms "Spitzenforschung und Innovationen in den neuen Ländern" erhalten. Das Programm wird vom Bundesministerium für Bildung und Forschung (BMBF) mit 12 Millionen Euro gefördert, der Senat Berlin fügt 25% der Förderungssumme hinzu. Die Partner im Verbundprojekt, das von den führenden Technologiefirmen der Dünnschicht-Photovoltaik unterstützt wird, bauen mit dem Geld ein Forschungszentrum zur Optimierung der Dünnschicht-Photovoltaik weiter aus. Lesen Sie dazu unsere Pressemitteilung
    [...]

  • Nachricht
    19.05.2009
    Millionen für die Photovoltaik
    Das Kompetenzzentrum "Dünnschicht- und Nanotechnologie für Photovoltaik Berlin (PVcomB)", ein Verbundprojekt von Forschungsinstituten und Hochschulen aus Berlin und Brandenburg, ist eines der Gewinnerprojekte des BMBF-Förderprogramms "Spitzenforschung und Innovationen in den neuen Ländern". Im Rahmen dieses Programms erhält das PVcomB 12 Millionen Euro, der Senat Berlin fügt 25% der Fördersumme hinzu. Die Partner im Verbundprojekt, das von den führenden Technologiefirmen der Dünnschicht-Photovoltaik unterstützt wird, bauen mit dem Geld ein Forschungszentrum zur Optimierung der Dünnschicht-Photovoltaik weiter aus. [...]
  • Nachricht
    17.04.2009
    Forschung, Technologie- und Marktentwicklung – die „Photovoltaics Thin-Film Week“ in Berlin Adlershof (20.–24.04.2009)

    Der Wissenschafts- und Technologiepark Adlershof (WISTA) entwickelt sich zu einem der weltweit führenden Standorte der Photovoltaik-Forschung und -Produktion.Vom 20. bis 24. April veranstalten hier das HZB – Helmholtz-Zentrum Berlin für Materialien und Energie, das PVcomB – Kompetenzzentrum Dünnschicht- und Nanotechnologie für Photovoltaik Berlin sowie der solare Wissensdienstleiter Solarpraxis die „Photovoltaics Thin-Film Week“. [...]

  • Nachricht
    26.02.2009
    Vortragsankündigung

    Im Rahmen des gemeinsamen Berufungsverfahrens der Freien Universität Berlin und des Helmholtz-Zentrums Berlin: [...]

  • Nachricht
    23.11.2007
    Marcus Bär baut Nachwuchsgruppe zur Entwicklung von Dünnschichtsolarzellen am HMI auf

    Das Hahn-Meitner-Institut (HMI) baut im Bereich Solarenergieforschung ab sofort eine neue Nachwuchsgruppe auf. Wie die Helmholtz-Gemeinschaft mitteilt, gehört Dr. Marcus Bär zu den 13 jungen Forschern, die in das Förderprogramm aufgenommen werden. Der 32-jährige Ingenieur ist derzeit an der University of Nevada, Las Vegas, USA, beschäftigt. Er wird am HMI an der Verbesserung von Dünnschichtsolarzellen forschen und an der Brandenburgischen Technischen Universität Cottbus (BTU) seine Erfahrung an Studierende weitergeben. [...]

  • Nachricht
    19.07.2007
    Magnetische Fingerabdrücke im Fotostrom

    Wissenschaftlern des Hahn-Meitner-Instituts Berlin (HMI) sowie der Freien Universität (FU) Berlin ist ein außergewöhnlicher Einblick ins Innere von organischen Materialien gelungen. Die Physiker konnten im Fotostrom erstmals eine Quantensignatur magnetisch aktiver Zentren in einer molekularen Schicht beobachten. Daraus ergeben sich neue Möglichkeiten sowohl für das Ein- und Auslesen von Quanteninformationen in molekularen Spinquantencomputern als auch für ein verbessertes Verständnis von organischer Photovoltaik.  [...]

  • Nachricht
    13.02.2007
    Kompetenzzentrum Dünnschicht- und Nanotechnologie für Photovoltaik wird in Berlin aufgebaut

    Das Hahn-Meitner-Institut (HMI), die Technische Universität Berlin (TUB) sowie acht führende Industrie-Unternehmen unterzeichnen ein Memorandum of Understanding (MoU) zur Gründung des Kompetenzzentrum Dünnschicht- und Nanotechnologie für Photovoltaik. [...]

  • Nachricht
    02.11.2006
    Steigert Unordnung die Effizienz von Solarzellen?

    Dünnschichtsolarzellen aus Chalkopyriten, so genannte CIS-Zellen (wie z.B. Kupfer-Indium-Sulfid und Kupfer-Indium-Selenid) weisen in der polykristallinen Form im Gegensatz zu Silizium-Zellen höhere Effizienzen auf als in der monokristallinen Form. Forscher des Hahn- Meitner-Instituts Berlin haben nun erstmals einen Nachweis geliefert, der dieses Phänomen erklären könnte. [...]

  • Nachricht
    31.08.2006
    Neue Abscheidemethode für Dünnschichtsolarzellen

    Berliner Forscher haben ein industriell etabliertes Beschichtungsverfahren für die Herstellung von Dünnschichtsolarzellen modifiziert. Mit dem großtechnisch eingesetzten Verfahren des Magnetronsputterns können prinzipiell höhere Abscheideraten und qualitativ bessere Schichten erzielt werden. [...]

  • Nachricht
    09.02.2006
    EU-Projekt ATHLET will Dünnschichtsolarzellen an den Markt bringen

    Die Kostensenkung von Solarzellen ist die zentrale Herausforderung der modernen Photovoltaik. In Berlin startet am 20. Februar das europaweit größte Forschungsprojekt, das sich dieser Herausforderung stellt. Universitäten, Forschungseinrichtungen und Unternehmen aus 11 Ländern arbeiten zusammen, um den Übergang der zweiten Generation von Solarzellen, so genannten Dünnschichtzellen, aus den Laboren in den Markt zu beschleunigen. [...]

  • Nachricht
    04.09.1999
    Bundesverdienstorden für Martha Lux-Steiner

    Die Physikerin Prof. Dr. sc. nat. Martha Christina Lux-Steiner erhält am 5. Oktober 1999 im Berliner Schloß Bellevue aus der Hand des Bundespräsidenten Johannes Rau den Bundesverdienstorden der Bundesrepublik Deutschland. Damit würdigt der Bundespräsident die wissenschaftlichen Leistungen von Frau Prof. Lux-Steiner auf dem Gebiet der solaren Energiegewinnung und ihren besonderen Einsatz für die regionale Zusammenarbeit zwischen Industrie und Forschung. [...]