HZB Newsroom

  • <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. [...]
  • <p>&lsquo;Chuck&rsquo; Fadley spoke at the inauguration of the EMIL facility in 2016.</p>
    News
    13.09.2019
    In Memoriam: Charles S. Fadley, Longstanding Collaboration Partner, Power User, Advisor

    Charles ‘Chuck’ S. Fadley, a pioneer in photoemission spectroscopy and internationally renowned Distinguished Professor Emeritus of Physics at the University of California, Davis, and Senior Faculty Scientist at the Lawrence Berkeley National Laboratory, USA, passed away on the 1st of August 2019. He remained an active and avid researcher until a few weeks before his death at age 77. [...]

  • <p>Dr. Paul Harten heads the new "Technology Transfer and Innovation" department</p>
    News
    09.09.2019
    HZB strengthens its technology transfer
    The Helmholtz-Zentrum Berlin (HZB) wants to bring technologies to market faster together with industrial partners and use its expertise in materials and energy research to investigate questions from industry in joint projects. The newly established "Technology Transfer and Innovation" department will identify cooperation partners and applications that are of industrial interest. [...]
  • <p>The operando cell was developed at HZB and allows to analyse processes inside the battery during charging cycles with neutrons.</p>
    Science Highlight
    06.09.2019
    Nanoparticles in lithium-sulphur batteries detected with neutron experiment
    An HZB team has for the first time precisely analysed how nanoparticles of lithium sulphide and sulphur precipitate onto battery electrodes during the course of the charging cycle. The results can help increase the service life of lithium-sulphur batteries. [...]
  • <p>Congratulation to Javier Villalobos from the Young Investigator Group <br />Oxygen Evolution Mechanism Engineering at HZB.</p>
    News
    06.09.2019
    Poster award for HZB doctoral student

    Javier Villalobos has been awarded for the best poster at the International Workshop on Correlated Dynamics in Energy Conversion (IWCE 19) in Göttingen. The doctoral student works in the young investigator group "Oxygen Evolution Mechanism Engineering". His research contributes to a better understanding of electrocatalytic oxygen evolution. [...]

  • <p>Silvio K&uuml;nstner (2nd from right) was awarded with five other young researchers at the EUROISMAR 2019 conference.</p>
    News
    05.09.2019
    HZB doctoral student won Young Scientist Award

    The "Journal of Magnetic Resonance" and the ISMAR (International Society of Magnetic Resonance) awarded Silvio Künstner with a Young Scientist Award for his talk "Rapid Scan EPR-on-a-chip". The doctoral student from the HZB institute for Nanospectroscopy presented current progress in the development of a miniaturized electron spin resonance spectrometer. [...]

  • 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>The nano-antennae werde produced in an electron microscope by direct electron-beam writing.</p>
    Science Highlight
    23.08.2019
    Save time using maths: analytical tool designs corkscrew-shaped nano-antennae
    For the first time, an HZB team has derived analytically how corkscrew-shaped nano-antennas interact with light. The mathematical tool can be used to calculate the geometry that a nano-antenna must have for specific applications in sensor technology or information technology. [...]
  • <p>View into the experimental hall of BESSY II at HZB, Berlin.</p>
    News
    22.08.2019
    Physicists develop "time machine" for materials research

    Researchers from Martin Luther University Halle-Wittenberg (MLU), Freie Universität Berlin and Technische Universität München will develop fast electronics for data acquisition at BESSY II. It will make it possible to record the signal of all X-ray flashes generated during the experiment. This will enable researchers to evaluate the data more extensively - even retrospectively. The Federal Ministry of Education and Research (BMBF) is funding the project with two million euros. [...]

  • <p>The rotary sample table turns around its axis at several hundred revolutions per second with extreme precision.</p>
    Science Highlight
    21.08.2019
    World record in tomography: Watching how metal foam forms
    An international research team at the Swiss Light Source (SLS) has set a new tomography world record using a rotary sample table developed at the HZB. With 208 three-dimensional tomographic X-ray images per second, they were able to document the dynamic processes involved in the foaming of liquid aluminium. The method is presented in the journal Nature Communications. [...]
  • <p>Olga Minakova invites you to a quizz in her post.</p>
    Portrait
    16.08.2019
    The HZB Summer Students blog about their first research experience
    Every summer, the Helmholtz-Zentrum Berlin invites young people from all over the world to work on a research project. For many, the summer student program is the first contact with research. How have they settled in? What do they do research on and what problems do they have to deal with locally? Our summer students write about their personal experiences in the HZB Science Blog. [...]
  • <p>A team of researchers examined an ancient papyrus with a supposed empty spot. With the help of several methods, they discovered which signs once stood in this place and which ink was used.</p>
    Science Highlight
    14.08.2019
    Archaeology at BESSY II: “Invisible ink” on antique Nile papyrus revealed
    Researchers from the Egyptian Museum and Papyrus Collection, Berlin universities and Helmholtz-Zentrum Berlin studied a small piece of papyrus that was excavated on the island of Elephantine on the River Nile a little over 100 years ago. The team used serval methods including non-destructive techniques at BESSY II. The researchers’ work, reported in the Journal of Cultural Heritage, blazes a trail for further analyses of the papyrus collection in Berlin. [...]
  • <p>The new german russian undulator beamline at BESSY II</p>
    News
    13.08.2019
    German Russian collaboration further strengthened at HZB
    HZB physicist Jaime Sánchez-Barriga establishes a "Helmholtz-RSF Joint Research Group". Over the next three years he will receive additional funding from the Helmholtz Association and the Russian Science Foundation (RSF) to investigate magnetic quantum materials for future information technologies with partners from the Lomonosov State University in Moscow. In particular, the funding should also enable the exchange and training of young scientists. [...]
  • News
    12.08.2019
    Lectures with accelerator physicist Alexander Wu Chao on 19 and 20 August 2019

    Alexander Wu Chao is one of the most important theorists in accelerator physics and has made many major contributions, including to the Stanford National Accelerator Laboratory (SLAC) and Stanford University. He will visit the HZB in August and take part in measurements at the Metrology Light Source. Alexander Wu Chao will also give two lectures to which you are cordially invited. [...]

  • <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>At the MX-Beamlines at BESSY II, Gottfried Palm, Gert Weber and Manfred Weiss could solve the 3D structure of MHETase.</p>
    News
    30.07.2019
    FOCUS TOPIC: Using BESSY II to combat plastic waste
    Plastics are excellent materials: extremely versatile and almost eternally durable. But this is also exactly the problem, because after only about 100 years of producing plastics, plastic particles are now found everywhere – in groundwater, in the oceans, in the air, and in the food chain.

    [...]

  • <p>The neutron school at ANSTO in cooperation with HZB experts could transfer knowledge and skills in neutron research.</p>
    News
    24.07.2019
    Traditional HZB Neutron School will be continued at ANSTO in Australia
    This summer, researchers at the Australian neutron source ACNS organised a joint neutron school at Australia's Nuclear Science and Technology Organisation ANSTO. The HZB-ANSTO neutron school will take place every two years.  [...]
  • <p class="MsoCommentText">The photomontage shows a sample of solid, pure niobium before coating (left), and coated with a thin layer of Nb<sub>3</sub>Sn (right).</p>
    Science Highlight
    15.07.2019
    Accelerator physics: alternative material investigated for superconducting radio-frequency cavity resonators
    In modern synchrotron sources and free-electron lasers, superconducting radio-frequency cavity resonators are able to supply electron bunches with extremely high energy. These resonators are currently constructed of pure niobium. Now an international collaboration has investigated the potential advantages a niobium-tin coating might offer in comparison to pure niobium. [...]
  • Science Highlight
    10.07.2019
    Oldest completely preserved lily discovered
    Already 115 million years ago, tropical flowering plants were apparently very diverse and showed all typical characteristics. This is the conclusion of an international team of researchers led by Clément Coiffard, Museum für Naturkunde Berlin. The team reported in the renowned journal Nature Plants on the oldest completely preserved lily, Cratolirion bognerianum, which was discovered at a site in present-day Brazil. With the help of 3D computer tomography at the Helmholtz-Zentrum Berlin, details on the back of the fossilised plant could also be analysed. The results raise new questions about the role of the tropics in the development of past and present ecosystems. [...]
  • <p>Group picture at arrival day at HZB.</p>
    News
    10.07.2019
    Summer in the laboratory: 24 students from all over the world start their summer project
    For eight weeks the summer students are now working on a research project at the Helmholtz Centre Berlin. Experienced scientists of the HZB will support them. On Thursday, 30 August, they will present their results. [...]
  • <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>When illuminated by the synchrotron light, nickel emits x-rays itself due to the decay of valence electrons. The number of emitted photons reduces when increasing the temperature from room temperature (left) to 900&deg;C (right).</p>
    Science Highlight
    28.06.2019
    Utrafast magnetism: electron-phonon interactions examined at BESSY II
    How fast can a magnet switch its orientation and what are the microscopic mechanisms at play ? These questions are of first importance for the development of data storage and computer chips. Now, an HZB team at BESSY II has for the first time been able to experimentally assess the principal microscopic process of ultra-fast magnetism. The methodology developed for this purpose can also be used to investigate interactions between spins and lattice oscillations in graphene, superconductors or other (quantum) materials. [...]
  • <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
    19.06.2019
    Support for the sheep at Campus Wannsee
    Since mid-May, sheep have been grazing on the Wannsee campus and contributing to landscape conservation. They have now been reinforced: Since 14 June 19, five sheep and five goats have been supporting the existing herd in its "work". Since the goats prefer to eat blackberries and thorny plants, they find ideal conditions on the natural property. [...]
  • <p>1st place: "The interior of an electron beam evaporator in operation"</p>
    News
    18.06.2019
    1st place for "Glowing Silicon Lake" at the HZB photo competition for the Long Night of Science
    More than 200 people have chosen their favourite pictures in the photo competition "Moments at the HZB" during the Long Night of Science. The winners have now been chosen, but the decision was extremely close. [...]
  • News
    17.06.2019
    1300 visitors at the HZB location Wannsee at the Long Night of Science

    Despite high summer temperatures, the HZB was able to welcome more than 1300 people to the Long Night of Science at Wannsee. This is about 15 percent more than the last time (2017) when the location took part. Visitor magnets were the guided tours through the energy research laboratories and the experimental halls around the research reactor. [...]

  • <p>This new laboratory building received the silver plaque "Sustainable Building" in April 2019.</p>
    News
    17.06.2019
    Silver plaque "Sustainable building" for laboratory building in Wannsee

    In Wannsee, a new laboratory building for organic chemistry (LE building) was built in just one and a half years, which has now been awarded the silver plaque "Sustainable Building". It is the first HZB building to be certified according to the strict criteria. On the ground floor there is a physical-chemical laboratory for the institute "Functional Oxides for Energy-Efficient Information Technologies (EM-IFOX)". [...]

  • News
    17.06.2019
    Members of the Berlin House of Representatives (Abgeordnetenhaus) visit Helmholtz-Zentrum Berlin
    On 17 June 2019, representatives of the Committee for Science and Research of the Berlin House of Representatives met with the management and scientists of the Helmholtz-Zentrum Berlin (HZB). During their two-hour visit, they visited energy research laboratories and discussed the campus's prospects for the site after the final shutdown of the BER II research reactor. [...]
  • News
    11.06.2019
    Long Night of Science at HZB's Wannsee site: Solar cells, environmentally friendly hydrogen and a visit to the experimental halls of the research reactor
    The sun provides an enormous amount of energy. But can we really use it to cover our energy needs? Can solar energy actually be stored? And how powerful will innovative batteries be? During the Long Night of Science on 15 June 2019 (17:00 - 24:00) at the Helmholtz Centre Berlin in Wannsee, visitors can talk to researchers, discover secret places and interesting details.Bring your identity card with you! [...]
  • Nachricht
    07.06.2019
    Neuer „lichtblick“ erschienen

    Heute demonstrieren wieder viele Schülerinnen und Schüler bei der »Fridays for Future«-Bewegung. Solarforscher Klaus Jäger unterstützt die protestierenden jungen Menschen aktiv. »Klimaschutz ist schlussendlich Menschenschutz«, sagt er in der Titelgeschichte. Er erzählt unter anderem von seinen Nachmittagen im Berliner Naturkundemuseum, wo er mit gut informierten Jugendlichen diskutiert. [...]

  • 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. [...]
  • <p>The illustration is alluding to the laser experiment in the background and shows the structure of TGCN.</p>
    Science Highlight
    05.06.2019
    Organic electronics: a new semiconductor in the carbon-nitride family
    Teams from Humboldt-Universität and the Helmholtz-Zentrum Berlin have explored a new material in the carbon-nitride family. Triazine-based graphitic carbon nitride (TGCN) is a semiconductor that should be highly suitable for applications in optoelectronics. Its structure is two-dimensional and reminiscent of graphene. Unlike graphene, however, the conductivity in the direction perpendicular to its 2D planes is 65 times higher than along the planes themselves. [...]
  • <p>Prof. Dr. Jan L&uuml;ning (l.) and Prof. Dr. Bernd Rech (r.) have been appointed as scientific directors of HZB since June 1, 2019.</p>
    News
    04.06.2019
    Helmholtz-Zentrum Berlin has new scientific management

    As of 1 June 2019, Prof. Dr. Bernd Rech and Prof. Dr. Jan Lüning are the new scientific directors of Helmholtz-Zentrum Berlin für Materialien und Energie. Bernd Rech is responsible for the “Energy and Information” department and Jan Lüning heads the “Matter” department. Thus the HZB Supervisory Board has appointed two internationally recognised experts at the top of HZB. [...]

  • 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. [...]
  • News
    29.05.2019
    90 preschool children experiment in the school lab for the Day of the Little Researchers

    Once a year the school lab says: Open doors for daycare children! 90 preschool children from five kindergartens experimented in the HZB school lab in Berlin-Adlershof for the nationwide Day of Little Researchers. Using homemade spectroscopes, they studied the properties of light and looked at poster snippets under the microscope. Actions are also planned at the Wannsee site. [...]

  • News
    28.05.2019
    Adolfo Velez Saiz is a professor of accelerator physics at TU Dortmund

    Technische Universität Dortmund and Helmholtz-Zentrum Berlin have jointly appointed Prof. Adolfo Velez Saiz as a professor of accelerator physics. He heads the Cavity Development workgroup at the HZB institute SRF – Science and Technology. With this appointment, HZB is expanding its expertise in the development of new accelerator technologies. [...]

  • <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. [...]

  • Nachricht
    21.05.2019
    Hörtipp: Die wissenschaftlichen Geschäftsführer im Interview des rbb-Inforadios

    „Physik made in Berlin“: Mitten in Berlin betreibt das HZB einen Forschungsreaktor und einen Teilchenbeschleuniger. Thomas Prinzler vom rbb-Inforadio spricht mit den wissenschaftlichen Geschäftsführern Prof. Bernd Rech und Prof. Jan Lüning darüber, was Forscher mit den kleinen Teilchen alles herausfinden können. Und warum die Anlagen ein Aushängeschild für Berlin sind. [...]

  • <p>Bassi presented results on new phases in the quaternary Fe-Ti-W-O system for application as photoelectrocatalyst in light-assisted water splitting.</p>
    News
    20.05.2019
    Posterprize for HZB postdoc Prince Saurabh Bassi
    Dr. Prince Saurabh Bassi was awarded the poster prize at “International Bunsen-Discussion-Meeting on Fundamentals and Applications of (Photo) Electrolysis for Efficient Energy Storage”. He is a postdoctoral fellow working with Prof. Sebastian Fiechter in the Institute for Solar Fuels. [...]
  • News
    17.05.2019
    Obituary for Prof. em. Dr. Hans-Joachim Lewerenz
    We are mourning the death of Prof. em. Dr. Hans-Joachim Lewerenz, who passed away on 24 April 2019 at the age of 70. From 1981 to 2014 he worked as a scientist and as department head in the field of renewable energies at our research institute. He was a pioneer in his research in photoelectrochemistry and photovoltaics. Prof. Hans-Joachim Lewerenz was a highly esteemed colleague and discussion partner far beyond the Center. We pay tribute to his work in the obituary.  [...]
  • <p>Seven sheep and two lambs are now grazing on the campus in Berlin-Wannsee, replacing the lawn mower.</p>
    News
    17.05.2019
    Sheep graze the Lise-Meitner-Campus in Wannsee

    On 15 May 2019 they arrived at the campus in Berlin-Wannsee: Seven female sheep and two lambs of the domestic sheep breed "Skudde". By autumn, they will graze the semi-natural campus and thus contribute to biodiversity. By doing without extensive mowing, natural wild meadows are to be created that are particularly insect- and bee-friendly. [...]

  • <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>Experiments at the femtoslicing facility of BESSY II revealed the ultrafast angular momentum flow from Gd and Fe spins to the lattice via orbital moment during demagnetization of GdFe alloy.</p>
    Science Highlight
    10.05.2019
    Laser-driven Spin Dynamics in Ferrimagnets: How does the Angular Momentum flow?
    When exposed to intense laser pulses, the magnetization of a material can be manipulated very fast. Fundamentally, magnetization is connected to the angular momentum of the electrons in the material. A team of researchers led by scientists from the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI) has now been able to follow the flow of angular momentum during ultrafast optical demagnetization in a ferrimagnetic iron-gadolinium alloy at the femtoslicing facility of BESSY II. Their results are helpful to understand the fundamental processes and their speed limits. The study is published in Physical Review Letters. [...]
  • <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>Tomography of a lithium electrode in its initial condition.</p>
    Science Highlight
    06.05.2019
    3D tomographic imagery reveals how lithium batteries age
    Lithium batteries lose amp-hour capacity over time. Microstructures can form on the electrodes with each new charge cycle, which further reduces battery capacity. Now an HZB team together with battery researchers from Forschungszentrum Jülich, the University of Munster, and partners in China have documented the degradation process of lithium electrodes in detail for the first time. They achieved this with the aid of a 3D tomography process using synchrotron radiation at BESSY II (HZB) as well at the Helmholtz-Zentrum Geesthacht (HZG). Their results have been published open access in the scientific journal "Materials Today". [...]
  • <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>SnSe is a highly layered orthorhombic structure. SnSe undergoes a phase transition of second order at 500&deg;C with an increase of the crystal symmetry from space group Pnma (left) to Cmcm (right).</p>
    Science Highlight
    24.04.2019
    High-efficiency thermoelectric materials: new insights into tin selenide
    Tin selenide might considerably exceed the efficiency of current record holding thermoelectric materials made of bismuth telluride. However, it was thought its efficiency became enormous only at temperatures above 500 degrees Celsius. Now measurements at the BESSY II and PETRA III synchrotron sources show that tin selenide can also be utilised as a thermoelectric material at room temperature – so long as high pressure is applied. [...]
  • <p>The enzyme MHETase is a huge and complex molecule. MHET-molecules from PET plastic dock at the active site inside the MHETase and are broken down into their basic building blocks.</p>
    Science Highlight
    12.04.2019
    "Molecular scissors" for plastic waste
    A research team from the University of Greifswald and Helmholtz-Zentrum-Berlin (HZB) has solved the molecular structure of the important enzyme MHETase at BESSY II. MHETase was discovered in bacteria and together with a second enzyme - PETase - is able to break down the widely used plastic PET into its basic building blocks. This 3D structure already allowed the researchers to produce a MHETase variant with optimized activity in order to use it, together with PETase, for a sustainable recycling of PET. The results have been published in the research journal Nature Communications. [...]
  • <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>The SEM shows Molybdenum sulfide deposited at room temperature.</p>
    Science Highlight
    04.04.2019
    Catalyst research for solar fuels: Amorphous molybdenum sulphide works best
    Efficient and inexpensive catalysts will be required for production of hydrogen from sunlight. Molybdenum sulphides are considered good candidates. A team at HZB has now explained what processes take place in molybdenum sulphides during catalysis and why amorphous molybdenum sulphide works best. The results have been published in the journal ACS Catalysis. [...]
  • <p>At the end of his contribution, Phillippe Wernet makes a great arch from the past (Opticae Thesaurus, 1572) of research with light to the future.</p>
    Science Highlight
    02.04.2019
    HZB contributions to special edition on Ultrafast Dynamics with X-ray Methods
    In the new special issue of the "Philosophical Transactions of the Royal Society of London", internationally renowned experts report on new developments in X-ray sources and ultrafast time-resolved experiments. HZB physicists have also been invited to contribute. [...]
  • Nachricht
    28.03.2019
    Girls'Day am Helmholtz-Zentrum Berlin
    Mehr als 60 Mädchen haben am 28. März 2019 das Helmholtz-Zentrum Berlin besucht und an verschiedenen Workshops zum Girls'Day teilgenommen. [...]
  • Nachricht
    27.03.2019
    Veranstaltungshinweis: Theater trifft Wissenschaft am 7. April im Berliner Ensemble

    Wie unterscheiden sich wissenschaftliche Erkenntnisse von bloßen Meinungsäußerungen? Ist die Wissenschaft mitverantwortlich für die zunehmend düsteren Zukunftsszenarien? Der Thementag über Wissenschaft zwischen Misstrauen und Verantwortung verspricht interessante Diskussionen. Mit dabei ist auch der HZB-Forscher Daniel Meza, der beim Science Slam am 7. April ab 14 Uhr auftreten wird. [...]

  • <p>Dr. Godehard W&uuml;stefeld was awarded the Horst Klein Research Prize.</p> <p></p> <p></p>
    News
    25.03.2019
    Godehard Wüstefeld receives the Horst Klein Research Prize
    The physicist Dr. Godehard Wüstefeld was awarded the Horst Klein Research Prize at the annual conference of the German Physical Society. The award recognizes his outstanding scientific achievements in accelerator physics in the development of BESSY II and BESSY VSR. [...]
  • News
    25.03.2019
    Recipe book "Sciencefood" available for download
    In the current HZB newspaper "lichtblick" we already advertised our new Sciencefood cookbook. On 60 pages we have published the recipes of our colleagues from all over the world. Whether Pierogi, Quesadillas, Crêpes or Tiramisu: In the recipe book, everyone will find something delicious to cook. The brochure is of course also available for download. [...]
  • Nachricht
    14.03.2019
    Neuer "lichtblick" erschienen
    Was leistet BESSY II? Und warum braucht die Nutzerschaft mittelfristig eine neue Synchrotron-Quelle? Diese Fragen haben wir Prof. Dr. Jan Lüning, den wissenschaftlichen Geschäftsführer für den Bereich „Materie“ am HZB, gefragt. Lesen Sie das Interview in der aktuellen Ausgabe der „lichtblick“ auf Seite 6. [...]
  • <p>Schematic view of carbon structures with pores.</p>
    Science Highlight
    13.03.2019
    X-ray analysis of carbon nanostructures helps material design
    Nanostructures made of carbon are extremely versatile: they can absorb ions in batteries and supercapacitors, store gases, and desalinate water. How well they cope with the task at hand depends largely on the structural features of the nanopores. A new study from the HZB has now shown that structural changes that occur due to morphology transition with increasing temperature of the synthesis can also be measured directly – using small-angle X-ray scattering. The results have now been published in the journal Carbon. [...]
  • <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
    28.02.2019
    HZB in pictures - two new movies at the end of the anniversary year
    "You need the courage to develop something you don't know exactly how the end result looks like. That's research and development, otherwise it would just be building." A key sentence Prof. Jens Knobloch says in the new HZB movie. [...]
  • <p>Working in the newly equipped HySPRINT lab for perovskite solar cells: Cooperation opportunities - also in other laboratories and topics - will be presented at the Industry Day.</p>
    News
    22.02.2019
    Industry day with focus on optoelectronics and photovoltaics at HZB in Adlershof

    On 28 March 2019, Helmholtz Zentrum Berlin kindly invites you to an Industry Day in Adlershof. We will provide information on cooperation opportunities and show laboratories that are available for joint research projects. Participants can expect a varied programme on the fields of material and component development, analytics and simulation. The event is free of charge, please register. [...]

  • <p>Water molecules are excited with X-ray light (blue). From the emitted light (purple) information on H-bonds can be obtained.</p>
    Science Highlight
    20.02.2019
    Water is more homogeneous than expected
    In order to explain the known anomalies in water, some researchers assume that water consists of a mixture of two phases even under ambient conditions. However, new X-ray spectroscopic analyses at BESSY II, ESRF and Swiss Light Source show that this is not the case. At room temperature and normal pressure, the water molecules form a fluctuating network with an average of 1.74 ± 2.1% donor and acceptor hydrogen bridge bonds per molecule each, allowing tetrahedral coordination between close neighbours. [...]
  • <p>More than 250 invited guests celebrated the tenth anniversary of HZB on 18 February at the TIPI at the Chancellery.</p>
    News
    18.02.2019
    10 Years of Helmholtz-Zentrum Berlin: A strong partner in the scientific landscape

    Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) is celebrating its tenth anniversary on 18 February 2019 with around 250 invited guests from science, politics and industry. The Centre is one of the world's top institutions and makes a decisive contribution to Berlin as a location for cutting-edge research. This was emphasized by Michael Müller, Governing Mayor of Berlin, in reference to the anniversary. [...]

  • <p>The cones represents the magnetization of the nanoparticles. In the absence of electric field (strain-free state) the size and separation between particles leads to a random orientation of their magnetization, known as superparamagnetism</p>
    Science Highlight
    14.02.2019
    Spintronics by “straintronics”: Superferromagnetism with electric-field induced strain
    Data storage in today’s magnetic media is very energy consuming. Combination of novel materials and the coupling between their properties could reduce the energy needed to control magnetic memories thus contributing to a smaller carbon footprint of the IT sector. Now an international team led by HZB has observed at the HZB lightsource BESSY II a new phenomenon in iron nanograins: whereas normally the magnetic moments of the iron grains are disordered with respect each other at room temperature, this can be changed by applying an electric field: This field induces locally a strain on the system leading to the formation of a so-called superferromagnetic ordered state. [...]
  • 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>Summer students 2018</p>
    News
    30.01.2019
    Application open: HZB International Summer Student Programme from 8 July to 30 August 2019
    Eight weeks of research: Take your chance to work on your own research project in close contact with our scientists and get deep insights into the work at the HZB laboratories. Apply now until the 15th of February for the international summer student programme at HZB. [...]
  • <p>Neutrons (red arrows) detect the presence of Lithium ions which have migrated into the silicon anode.</p>
    Science Highlight
    28.01.2019
    Batteries with silicon anodes: Neutron experiments show how formation of surface structures reduces amp-hour capacity
    In theory, silicon anodes could store ten times more lithium ions than graphite anodes, which have been used in commercial lithium batteries for many years. However, the amp-hour capacity of silicon anodes so far has been declining sharply with each additional charge-discharge cycle. Now an HZB team at BER II of the HZB in Berlin and the Institut Laue-Langevin in Grenoble has utilised neutron experiments to establish what happens at the surface of the silicon anode during charging and what processes reduce this capacity. [...]
  • News
    21.01.2019
    Postdoc Career Office founded at HZB
    The Helmholtz-Zentrum Berlin is setting up a "Postdoc Career Office" to support postdoctoral researchers in actively planning their future careers. Since 15 January 2019, Dr. Christoph Scherfer has been the contact person for postdocs at the HZB. The Helmholtz Association supports the development of the postdoctoral office at the HZB over a period of five years.    [...]
  • <p>The model refers to a cubic crystal structure (pyrochlore lattice). Not only were magnetic interactions between the nearest neighbours included, but also with the next nearest neighbours (see drawing).</p>
    Science Highlight
    21.01.2019
    New insights into magnetic quantum effects in solids
    Using a new computational method, an international collaboration has succeeded for the first time in systematically investigating magnetic quantum effects in the well-known 3D pyrochlore Heisenberg model. The surprising finding: physical quantum phases are formed only for small spin values. [...]
  • <p class="MsoPlainText">The atmosphere can be compared to a bathtub that can only be filled to its rim if global warming is to be limited to a certain level. We could create another small outward flow with negative emissions. However, there is no way around turning off the tap.</p>
    Science Highlight
    16.01.2019
    Climate change: How could artificial photosynthesis contribute to limiting global warming?

    If CO2 emissions do not fall fast enough, then CO2 will have to be removed from the atmosphere in the future to limit global warming. Not only could planting new forests and biomass contribute to this, but new technologies for artificial photosynthesis as well. An HZB physicist and a researcher at the University of Heidelberg have estimated how much surface area such solutions would require. Although artificial photosynthesis could bind CO2 more efficiently than the natural model, there are still no large modules that are stable over the long term. The team published their calculations in "Earth System Dynamics".

    [...]

  • News
    15.01.2019
    Two new Helmholtz Young Investigator Groups will start in 2019

    Starting in 2019, Helmholtz-Zentrum Berlin (HZB) will be establishing two new Helmholtz Young Investigator Groups and thereby strengthening its competencies in catalysis research. The Helmholtz Association will be funding each group with 150,000 euros annually over a period of five years, and HZB will be matching that sum with its own funds. [...]

  • <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>(a) Neutronen-Eigenspannungsmessung an einer Schwei&szlig;probe aus handels&uuml;blichen Stahl, (b) Magnetfeldmessung, (c) Schwei&szlig;nahtquerschliff.</p>
    Science Highlight
    21.12.2018
    Neutronenforschung hilft bei der Entwicklung von zerstörungsfreien Prüfverfahren
    Materialermüdung zeigt sich häufig zuerst daran, dass im Innern des Materials Bereiche mit stark unterschiedlichen Eigenspannungen aneinandergrenzen. An der Neutronenquelle BER II am HZB hat ein Team der Bundesanstalt für Materialforschung und –prüfung (BAM) die Eigenspannungen von Schweißnähten aus ferromagnetischem Stahl analysiert. Die Ergebnisse helfen zerstörungsfreie elektromagnetische Prüfverfahren zu verbessern. [...]
  • <p>Lena Gra&szlig; has received an award by GBM for her master thesis.</p>
    News
    20.12.2018
    Outstanding master thesis on the structure and function of a bacterial enzyme honoured
    On December 17, 2018, Lena Graß, a PhD student from the Structural Biochemistry Group at Freie Universität Berlin, was awarded the Master Prize of the Gesellschaft für Biochemie und Molekularbiologie e.V. (Society for Biochemistry and Molecular Biology) (GBM). For her master thesis at Freie Universität Berlin and the MX beamlines of BESSY II, she deciphered the structure and function of a so-called RNA helicase. [...]
  • <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>The Ernst Eckhard Koch Prize went to Dr. Victoriia Saveleva (right) for her work on catalysts.</p>
    News
    12.12.2018
    Ernst Eckhard Koch Prize and Synchrotron Radiation Innovation Award
    On December 6, 2018, the Association of Friends of Helmholtz-Zentrum Berlin awarded the Ernst Eckhard Koch Prize for an outstanding doctoral thesis in the field of research with synchrotron radiation at the HZB or at DESY as well as the European Innovation-Award on Synchrotron Radiation. The award ceremonies took place during the 10th User Meeting at the HZB. [...]
  • <p>Photocathode in superconducting photoinjector system.</p>
    Science Highlight
    07.12.2018
    Milestone for bERLinPro: photocathodes with high quantum efficiency
    A team at the HZB has improved the manufacturing process of photocathodes and can now provide photocathodes with high quantum efficiency for bERLinPro. [...]
  • <p>In September Bahrdt and team could insert the CPMU17 undulator in the storage ring in order to provide synchrotron light for EMIL.</p>
    News
    06.12.2018
    Key competencies for BESSY III: Undulators
    HZB undulators are not only used in the BESSY II synchrotron lightsource. They also enjoy great popularity at other large-scale research facilities. HZB has already supplied undulators to renowned centres such as the Paul Scherrer Institute in Switzerland, DESY in Hamburg, and MAX IV in Sweden. Undulators are key components in the operation of synchrotron lightsources. [...]
  • <p>Lively discussions in the evening events - a tradition at the usermeetings.</p>
    News
    05.12.2018
    BER II und BESSY II: 10. User meeting at HZB
    More than 400 scientists have registered this year for the 10th BER II and BESSY II User Meeting at the HZB. Manufacturers of precision instruments present their products at 52 stands. The conference will run from Wednesday, December 5 to Friday, December 7, 2018. On Thursday, the HZB Circle of Friends will reward outstanding scientists in the field of synchrotron radiation with the Innovation Award and bestow the Ernst Eckard Koch Prize for the best doctoral thesis. [...]
  • <p>From left to right: Prof. Dr. Jan L&uuml;ning (HZB, design. GF), Dr. Roland Steitz (HZB), H.E. Dr. Khaled TOUKAN (Chairman of Jordan Atomic Energy Commission), Dr. Antje Vollmer (HZB), Mr Akram Hayjeneh (Jordan Embassy in Berlin), Dr. Samer Kahook (Manager of JRTR Jordan Atomic Energy Commission).</p>
    News
    04.12.2018
    Delegation from Jordan visited the HZB
    The Helmholtz-Zentrum Berlin (HZB) will intensify its cooperation with Jordanian large-scale research facilities. This was agreed between Prof. Dr. Jan Lüning and representatives of a high-ranking Jordanian research delegation, which visited the HZB at the end of November 2018.  [...]
  • <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. [...]
  • Nachricht
    28.11.2018
    Video: Was machen eigentlich Metallographen?

    „Am Helmholtz-Zentrum Berlin kommen wir an die richtig krassen Elektronenmikroskope ran“, sagt Toni. Er ist gelernter Metallograph und erklärt im Video des LETTE Vereins Berlin, was man in dem Beruf alles können muss und welche Werkzeuge dafür nötig sind. [...]

  • <p><span>The APPLE II UE56 double undulator generates brilliant light with variable polarization.</span></p>
    News
    26.11.2018
    HZB builds undulator for SESAME in Jordan
    The Helmholtz-Zentrum Berlin is building an APPLE II undulator for the SESAME synchrotron light source in Jordan. The undulator will be used at the Helmholtz SESAME beamline (HESEB) that will be set up there by five Helmholtz Centres. The Helmholtz Association is investing 3.5 million euros in this project coordinated by DESY. [...]
  • <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.  [...]
  • News
    20.11.2018
    User operation restarted at BESSY II
    On 20 November 2018, user operation of BESSY II restarted after a longer shutdown and maintenance period. The electron storage ring was shut down on July 30, 2018 to install or replace important components. [...]
  • <p>Prof. Efim Gluskin headed the accelerator physics department at Advanced Photon Source from 2004 to 2010 and continues to be active in undulator development.</p>
    News
    20.11.2018
    D-Lecture on 30th November 2018: Undulators for existing and future light sources
    Prof. Efim Gluskin from the Argonne National Laboratory will present on 30th November 2018 his thoughts on Undulators for existing and future light sources. After the presentation we will have time for informal discussion with "mulled wine and gingerbread" in the BESSY foyer. [...]
  • <p>From left to right: The DTG board, Prof. E. M&uuml;ller (DLR) and Dipl.-Ing. N. Katenbrink (company Quick-Ohm) present the Young Scientist Prize to Alexander Petsch (HZB), whose work was supervised by Dr. K. Fritsch and PD Dr. K. Habicht (both HZB).</p>
    News
    19.11.2018
    Alexander Petsch awarded the Young Investigators Prize of the German Thermoelectric Society
    Alexander Petsch from the HZB Department Methods and Characterization of Transport Phenomena in Energy Materials was awarded the Young Scientist Prize 2018 of the German Thermoelectrics Society e.V. (DTG) for his outstanding Bachelor thesis. [...]
  • <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. [...]
  • Nachricht
    12.11.2018
    Veranstaltungstipp: Theaterstück Kernfragen über Lise Meitner am 13.11.2018
    Am 13. November 2018 wird an der Freien Universität ein Theaterstück zu Lise Meitner uraufgeführt, das durch das PORTRAITTHEATER aus Wien realisiert wird. Das Stück "KERNFRAGEN" basiert auf dokumentarischem Material, unter anderem dem umfangreichen Briefwechsel zwischen Lise Meitner und Max von Laue, der bislang wenig öffentlich bekannt ist. Der Eintritt ist frei, um Anmeldung wird gebeten. [...]
  • <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>The data show that In the case of the two-layer graphene, a flat part of bandstructure only 200 milli-electron volts below the Fermi energy.</p>
    Science Highlight
    10.11.2018
    Graphene on the way to superconductivity
    Scientists at HZB have found evidence that double layers of graphene have a property that may let them conduct current completely without resistance. They probed the bandstructure at BESSY II with extremely high resolution ARPES and could identify a flat area at a surprising location. [...]
  • <p>Computer scientist Andreas Maier, materials researcher Silke Christiansen and medical expert Georg Schett have been awarded with an ERC Synergy Grant. </p>
    News
    23.10.2018
    ERC Synergy grant with HZB participation
    Novel X-ray microscope to produce microstructural images in situ and in vivo [...]
  • <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>Doped Diamond Foam. </p>
    Science Highlight
    18.10.2018
    Nanodiamonds as photocatalysts
    Diamond nanomaterials are considered hot candidates for low-cost photocatalysts. They can be activated by light and can then accelerate certain reactions between water and CO2 and produce carbon-neutral "solar fuels". The EU project DIACAT has now doped such diamond materials with boron and shown at BESSY II how this could significantly improve the photocatalytic properties. [...]
  • <p>Prof. Dr. Andrea Denker is the head of the department "Proton Therapy" at HZB. </p>
    News
    16.10.2018
    Andrea Denker is Professor of "Accelerator Physics for Medicine"
    The Beuth Hochschule für Technik Berlin and the Helmholtz-Zentrum Berlin (HZB) have appointed Prof. Dr. Andrea Denker to the joint professorship "Accelerator Physics for Medicine" as of October 1, 2018. Since 2006, Andrea Denker is head of the department "Proton Therapy" at the HZB, which operates the accelerator for eye tumor therapy. The therapy, offered in cooperation with the Charité - Universitätsmedizin Berlin and the HZB, is unique in Germany. [...]
  • <p>The STM image shows blue phosphorus on a gold substrate. The calculated atomic positions of the slightly elevated P atoms are shown in blue, the lower lying ones in white. Groups of six elevated P atoms appear as triangles. </p>
<p><strong> </strong></p>
    Science Highlight
    15.10.2018
    Blue phosphorus - mapped and measured for the first time
    Until recently, the existence of "blue" phosphorus was pure theory: Now an HZB team was able to examine samples of blue phosphorus at BESSY II for the first time and confirm via mapping of their electronic band structure that this is actually this exotic phosphorus modification. Blue phosphorus is an interesting candidate for new optoelectronic devices. The results have been published in Nano Letters. [...]
  • <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. [...]
  • Nachricht
    10.10.2018
    Am 15. Oktober startet die Ringvorlesung der Freien Universität Berlin– Zum Gedenken an Lise Meitner
    Lise Meitner ist eine der bedeutendsten Wissenschaftlerinnen des 20. Jahrhunderts. Die Freie Universität Berlin würdigt im Rahmen einer Ringvorlesung die Leistungen Lise Meitners und arbeitet deren Bedeutung für die Wissenschaft und Kultur auf. Die Veranstaltung findet immer montags von 18.15 bis 19.45 Uhr statt, Beginn ist am 15. Oktober. [...]
  • <p>The theory group with Joe Dzubiella. </p>
    News
    08.10.2018
    Collaboration between HZB and the University of Freiburg
    Through a Joint Research Group entitled “Simulation of Energy Materials“ Prof. Joachim Dzubiella of the Albert-Ludwigs-Universität, Freiburg will be able to continue his collaboration with the HZB. The theoretical physicist headed the “Theory and Simulation“ group at the HZB until recently and worked closely together with colleagues conducting experimental research. The new research group will concentrate on electrochemical energy storage and solar fuels. [...]
  • <p>Shown are the magnetic fluxlines inside a superconducting sample of lead in two different directions. The scale bar is 5 mm. </p>
    Science Highlight
    02.10.2018
    Neutrons scan magnetic fields inside samples
    With a newly developed neutron tomography technique, an HZB team has been able to map for the first time magnetic field lines inside materials at the BER II research reactor. Tensorial neutron tomography promises new insights into superconductors, battery electrodes, and other energy-related materials. [...]
  • <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>Photo: HZB/J. Bierbaum</p>
    News
    28.09.2018
    Scientific delegation from China visited the HZB
    On 28 September 2018, a 25-member delegation from China gathered information about materials research at the Helmholtz Zentrum Berlin. Representatives from various research institutes, universities and industrial companies visited the Lise-Meitner Campus in Wannsee and had discussions with the HZB researchers. [...]
  • <p>Milena Meschenmoser completed the best apprenticeship of her year. After finishing her training as a precision mechanic, she now has new plans.</p>
    News
    28.09.2018
    Berlin’s best apprentice for precision mechanic comes from the HZB
    Milena Meschenmoser completed her apprenticeship as a precision mechanic as the best in Berlin. From 2014 to 2018, she completed the practical part of her training at the HZB workshop in Wannsee. [...]
  • News
    24.09.2018
    Atoosa Meseck is a professor of accelerator physics at the University of Mainz
    On 1 September 2018, Johannes Gutenberg University Mainz appointed Atoosa Meseck to the joint professorship “Accelerator physics – collective effects and nonlinear beam dynamics”. Prof. Dr. Atoosa Meseck is researching at HZB into novel concepts for undulators, as are indispensable for producing high brightness synchrotron radiation. Among other things, she is developing undulator concepts for the successor facility BESSY III, for which the concept is currently being developed at HZB. [...]
  • <p>Monthly news from HZB - via email newsletter.</p>
    Science Highlight
    24.09.2018
    Newsletter and Highlightreport
    Exactly twenty years ago, BESSY II went into operation. In the current September newsletter, which we are sending out this week, we present the anniversary website, report on the new highlight report 2017 and on successes in technology transfer. Have you already registered for the newsletter? Here is the registration link. [...]
  • <p>A heavy-duty crane lifted the undulator from the testing hall onto a truck, which transported it to the truck sluice of the experimental hall. </p>
    News
    21.09.2018
    Spectacular transport: Undulator moved to the electron storage ring BESSY II
    A worldwide unique undulator developed at Helmholtz-Zentrum Berlin (HZB) was installed in the storage ring BESSY II on September 20, 2018. It supplies the "Energy Materials In-Situ Lab EMIL" with the hard X-ray light from BESSY II. The transport of the six-ton device was spectacular: several cranes were used to transport the undulator just a few hundred meters from the production building to the storage ring. [...]
  • <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. [...]