HZB Newsroom

Sear results - All news (365 days)

  • Nachricht
    06.12.2021
    Allianz der Wissenschaftsorganisationen: Aufruf zu mehr Sachlichkeit in Krisensituationen
    Zur aktuellen Berichterstattung der BILD-Zeitung im Zusammenhang mit der Coronavirus-Pandemie erklärt die Allianz der Wissenschaftsorganisationen:

    „Die BILD-Zeitung setzt mit dem Beitrag „Die Lockdown-Macher“ vom 4. Dezember 2021 ihre im vergangenen Jahr begonnene einseitige Berichterstattung gegen Wissenschaftlerinnen und Wissenschaftler fort, die ihre fachliche Expertise in den Dienst von Politik und Gesellschaft stellen, um der Coronavirus-Pandemie und ihren gerade in diesen Tagen dramatisch sichtbaren Folgen zu begegnen.

  • <p>The photo shows the cells on the modified sample holder which was used in the real experiment. This modified sample holder is mounted within the ALICE chamber at BESSY II.</p>
    Science Highlight
    06.12.2021
    Liquid crystals for fast switching devices
    An international team has investigated a newly synthesized liquid-crystalline material that promises applications in optoelectronics. Simple rod-shaped molecules with a single center of chirality self-assemble into helical structures at room temperature. Using soft X-ray resonant scattering at BESSY II, the scientists have now been able to determine the pitch of the helical structure with high precision. Their results indicate an extremely short pitch at only about 100 nanometres which would enable applications with particularly fast switching processes.

  • <p>Device where the long range Josephson coupling has been demonstrated.&nbsp; Superconducting YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7 </sub>regions (yellow) are separated by a half-metal La<sub>2/3</sub>Sr<sub>1/3</sub>MnO<sub>3</sub> ferromagnet (green).</p>
    Science Highlight
    02.12.2021
    Green information technologies: Superconductivity meets Spintronics
    Superconducting coupling between two regions separated by a one micron wide ferromagnetic compound has been proved by an international team. This macroscopic quantum effect, known as Josephson effect, generates an electrical current within the ferromagnetic compound made of superconducting Cooper-pairs. Magnetic imaging of the ferromagnetic region at BESSY II has contributed to demonstrate that the spin of the electrons forming the Cooper pairs are equal. These results pave the way for low-power consumption superconducting spintronic-applications where spin-polarized currents can be protected by quantum coherence.

  • <p>Illustration of the QFI calculation&nbsp;&#8203;</p>
    Science Highlight
    25.11.2021
    Neutron data help to reveal “spooky” entanglement in quantum magnets
    Using data from the British neutron source ISIS from the year 2000, research teams have now demonstrated the viability of a “quantum entanglement witness” capable of proving the presence of entanglement between magnetic particles, or spins, in a quantum material. A team from HZB led by Prof. Bella Lake was also involved in the analysis.
  • Nachricht
    23.11.2021
    BIPV – Chance für die Photovoltaik im urbanen Kontext: Jetzt anmelden
    Das Webinar „Bauwerkintegrierte Photovoltaik (BIPV) – Chance für die Photovoltaik im urbanen Kontext“ widmet sich der Photovoltaik im Gebäudesektor, der für die Klimaneutralität eine wichtige Rolle spielt.
  • <p>The world record cell (here in front of the electron storage ring BESSY II) has an area of about one square centimetre, a typical lab size.</p>
    News
    22.11.2021
    World record again at HZB: Almost 30 % efficiency for next-generation tandem solar cells
    Three HZB teams led by Prof. Christiane Becker, Prof. Bernd Stannowski and Prof. Steve Albrecht have jointly managed to increase the efficiency of perovskite silicon tandem solar cells fabricated completely at HZB to a new record value of 29.80 %. The value has now been officially certified and is documented in the NREL-charts. This brings the 30 percent mark within reach.

  • <p>Dr. Felix B&uuml;ttner is leading a Helmholtz Young Investigator group at HZB on topological solitons.</p>
    News
    18.11.2021
    Walter-Schottky-Award for Felix Büttner
    The Walter Schottky Prize honours outstanding work by young physicists in solid-state research. For 2022, the award goes to HZB physicist Dr Felix Büttner for his groundbreaking achievements in the field of magnetic skyrmions.

  • News
    18.11.2021
    Germany on the road to net zero: a new Web Atlas shows the options
    Which technical and nature-based options as well as political decisions can support Germany in being CO2-neutral? These questions are answered by the new web atlas of the Climate Service Center Germany (GERICS) at the Helmholtz-Zentrum Hereon. The new tool is aimed at politicians, experts and the public. The HZB has also contributed to the web atlas.

  • <p>Finely ground powders can also react with each other without solvents to form the desired product. This is the approach of mechanochemistry.</p>
    Science Highlight
    16.11.2021
    "Green" chemistry: BESSY II sheds light on mechanochemical synthesis
    In mechanochemistry, reagents are finely ground and mixed so that they combine to form the desired product, even without need for solvent. By eliminating solvent, this technology promises to contribute significantly towards ‘green’ and environmentally benign chemical manufacture in the future. However, there are still major gaps in understanding the key processes that occur during mechanical treatment and reaction. A team led by the Federal Institute for Materials Research (BAM) has now developed a method at BESSY II to observe these processes in situ with X-ray scattering. 

  • <p>Felicia Laberer in Tokyo.</p>
    News
    16.11.2021
    Vote for Felicia Laberer as young sportswoman of the year!

    At her first Paralympics participation, Felicia Laberer won bronze in Tokyo. For the 20-year-old athlete, this is a dream come true - after hard weeks of training. Support Felicia in her election as Young Sportswoman of the Year and Sportswoman of the Year in Berlin!

  • News
    12.11.2021
    20 Years Russian-German Joint Laboratory at BESSY II
    To mark its 20th anniversary, the Russian-German Laboratory at the BESSY II storage ring for synchrotron radiation in Berlin is organising an online workshop on 18 and 19 November. Scientists will discuss the future perspectives of Russian-German cooperation as well as innovative projects and new goals of the laboratory.

  • News
    12.11.2021
    Live broadcast at HZB - now as podcast!
    After a live broadcast the programme "Die Profis" is now online as a podcast.
  • <p>HZB is the first non-university research institution to be awarded the " Vielfalt gestalten " ("Shaping Diversity") certificate by the Stifterverband.<br /><br />(from left to right: Volker Meyer-Guckel, Deputy Secretary General of the Stifterverband, Jennifer Schevardo, HZB Project Manager Diversity Audit, Jan L&uuml;ning, scientific director at HZB).</p>
    News
    11.11.2021
    Stifterverband certifies Helmholtz Centre Berlin for strategies in dealing with diversity

    The Helmholtz-Zentrum Berlin (HZB) is the first non-university research institution to have undergone the Stifterverband's diversity audit "Vielfalt gestalten". The certification attests to the HZB's opportunity-oriented concepts and measures for diverse groups of people.

  • <p>Perovskite expert Dr Antonio Abate has accepted a call to a W2 professorship at Bielefeld University.</p>
    News
    03.11.2021
    Professorship for Antonio Abate at Bielefeld University
    Dr. Antonio Abate investigates perovskite semiconductors for low-cost and highly efficient solar cells and heads a large research group at the Helmholtz Centre Berlin. Now he has accepted a W2 professorship in the Department of Chemistry at Bielefeld University.

  • <p>STM topography of a monolayer CrCl<sub>3</sub> grown on Graphene/6H-SiC(0001). Inset, a magnified topography image, which reveals the grain boundaries.</p>
    Science Highlight
    29.10.2021
    Spintronics: Exotic ferromagnetic order in two-dimensions
    An international team has detected at HZB's vector magnet facility VEKMAG an unusual ferromagnetic property in a two-dimensional system, known as “easy-plane anisotropy”. This could foster new energy efficient information technologies based on spintronics for data storage, among other things. The team has published its results in the renowned journal Science.

  • <p>Sharing knowledge is a pleasure for Roland M&uuml;ller. Here he explains to his granddaughter how BESSY II works.</p>
    News
    21.10.2021
    Life Time Achievement Award for Roland Müller
    Accelerator and control systems expert Roland Müller received the ICALEPCS Lifetime Achievement Award. In the more than thirty years of his career at BESSY, the physicist has advanced many projects on control systems at accelerators and has been particularly committed to the international exchange of knowledge.

  • <p></p> <p>The picture shows the glowing filament which keeps the sample at constant temperatures during the measurements.</p> <p></p>
    Science Highlight
    15.10.2021
    Ultrafast magnetism: heating magnets, freezing time
    Magnetic solids can be demagnetized quickly with a short laser pulse, and there are already so-called HAMR (Heat Assisted Magnetic Recording) memories on the market that function according to this principle. However, the microscopic mechanisms of ultrafast demagnetization remain unclear. Now, a team at HZB has developed a new method at BESSY II to quantify one of these mechanisms and applied it to the rare-earth element Gadolinium, whose magnetic properties are caused by electrons on both the 4f and the 5d shells. This study is completing a series of experiments done by the team on Nickel, Iron-Nickel Alloys. Understanding these mechanisms is useful for developing ultrafast data storage devices.

  • <p>Olga Kasian has accepted a professorship at the Friedrich-Alexander-Universit&auml;t Erlangen-N&uuml;rnberg (FAU).</p>
    News
    13.10.2021
    Friedrich-Alexander Universität Erlangen-Nürnberg appoints Olga Kasian
    Dr. Olga Kasian is investigating why catalysts for hydrogen production by water electrolysis are limited in efficiency. The chemist has now accepted a professorship at the Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU). The W2 professorship is entitled "Materials for Electrochemical Energy Conversion" and is located at the Faculty of Engineering.

  • <p>Annette Pietzsch infront of her instrument at the PTB hall at BESSY II.</p>
    Portrait
    07.10.2021
    Portrait Annette Pietzsch: Researching fundamental phenomena of our world
    Annette Pietzsch has many jobs: the physicist develops instruments for BESSY II that researchers can use to observe how molecules interact with each other. She mostly prefers to use the instruments to do her own research. This is what brought her from Sweden to HZB ten years ago.
  • <p>Maximilian Fleischer, speaker of the Industry Council and Tobias Henschel, Winner of the HZB Technology Transfer Preises 2021.</p>
    News
    07.10.2021
    Solar energy for a sport watch: HZB Technology Transfer Prize 2021 awarded
    At first glance, it looks like an ordinary wristwatch. But its glass taps the energy of the sun. A research group at Helmholtz-Zentrum Berlin has made this possible. Their transparent photovoltaics have now even made it into mass production, securing the team this year's HZB Technology Transfer Award.

  • <p>Five different types of defects in MAPI-perovskites were examined and characterised. The result: a large proportion of defects is not trapping the charge carriers for long.</p>
    Science Highlight
    07.10.2021
    Perovskite solar cells: Defects trap charge carriers - and release them again
    An international team at HZB and Charles University Prague has investigated how charge carriers in so called MAPI-perovskite semiconductors interact with different defects. They show that a large proportion of defects quickly releases trapped charge carriers. These results could help to further improve the properties of perovskite solar cells.

  • <p>Map obtained for a thin barium titanate film after clustering the data measured by contact Kelvin probe force microscopy (cKPFM) by a machine learning method. From this map, scientists can obtain detailed information on how the ferroelectric domains are distributed and what their respective polarization amplitude is.</p>
    Science Highlight
    06.10.2021
    A sharp look into tiny ferroelectric crystals
    What happens to ferroelectric materials when their dimensions are greatly reduced? A team of researchers at HZB has now been able to show how this question can be answered in a detailed way.

  • <p>Information on beam quality can be extracted via the interference patterns at different focal lengths and photon intensities.</p> <p></p>
    Science Highlight
    30.09.2021
    Beam diagnostics for future laser wakefield accelerators
    For decades, particle accelerators have been getting bigger and bigger. In the meantime, ring accelerators with circumferences of many kilometres have reached a practical limit. Linear accelerators in the GHz range also require very long construction lengths. For some years now, however, an alternative is explored: "tabletop particle accelerators" based on the laser excitation of charge waves in plasmas (laser wakefield). Such compact particle accelerators would be particularly interesting for future accelerator-driven light sources, but are also being investigated for high-energy physics. A team from Helmholtz-Zentrum Berlin (HZB) and the Physikalisch-Technische Bundesanstalt (PTB) has developed a method to precisely measure the cross-section of electron bunches accelerated in this way.  This brings applications of these new accelerator technologies for medicine and research closer.

  • <p>Such metal foams based on aluminium alloys are being investigated as lightweight materials, for example for the construction of electric cars. The morphology, size and cross-linking of the bubbles are important to achieve the desired mechanical properties such as strength and stiffness in large components.</p>
    Science Highlight
    27.09.2021
    New world record in materials research - X-ray microscopy with 1000 tomograms per second
    Tomoscopy is an imaging method in which three-dimensional images of the inside of materials are calculated in rapid succession. Now a team led by HZB physicist Francisco García Moreno has achieved a new world record at the TOMCAT beamline of the Swiss Light Source at the Paul Scherrer Institute: with 1000 tomograms per second, it is now possible to non-destructively document very fast processes and developments in materials on the micrometre scale, such as the burning of a sparkler or the foaming of a metal alloy for the production of stable lightweight materials. 

  • News
    21.09.2021
    BR50: How Berlin could be developed into a world-leading science metropolis
    On 26 September, not only the Bundestag but also the Berlin House of Representatives will be newly elected. In a position paper, the non-university institutions in the capital that are united in Berlin Research 50 now emphasise what is important for research after the election. In it, they outline 10 demands that the future Senate should implement in order to further strengthen Berlin as a science metropolis.



  • News
    21.09.2021
    Technology Transfer Award ceremony on 5.10.: Visit the poster exhibitions

    On 5 October, the best innovation project from HZB will be awarded the Technology Transfer Prize 2021. The award ceremony will be broadcast online from the BESSY II lecture hall from 2 pm. You can already find out about all the submitted projects in our exhibition, which can be found from 21.09 in Wannsee in front of the colloquium room and in Adlershof in front of the BESSY cafeteria.

  • <p>T-x phase diagram has been created for MAPb(I,Br)<sub>3</sub> for the first time. It was revealed that the phase transition temperature of the iodine-rich mixed crystals drops as iodine content increases.</p>
    News
    17.09.2021
    Royal Society of Chemistry praises HZB team’s paper on hybrid perovskite structures

    For the 10th anniversary collection of its journal, the Royal Society of Chemistry (RSC) selected a paper published by a team from HZB. The paper from HZB is described as one of the most important contributions in the field of solar energy in recent years. The journal praised 23 selected papers that had been often cited or downloaded, and which offered a valuable advantage for further research. 

  • <p></p> <p class="MsoCommentText">The illustration shows how the APECS measurement works on a nickel single crystal with an oxidised surface. An X-ray beam ionises atoms, either in the nickel crystal or on the surface. The excited photoelectrons from the surface and from the crystal have slightly different binding energies. The Auger electrons make it possible to determine the origin of the photoelectrons.&nbsp;</p> <p></p>
    Science Highlight
    16.09.2021
    Surface analysis at BESSY II: sharper insights into thin-film systems

    Interfaces in semiconductor components or solar cells play a crucial role for functionality. Nevertheless, until now it has often been difficult to investigate adjacent thin films separately using spectroscopic methods. An HZB team at BESSY II has combined two different spectroscopic methods and used a model system to demonstrate how well they can be distinguished.

  • <p>The bouquet in the colours of her canoe according to the motto: Pink macht flink (Engl. pink makes you nimble)!</p>
    News
    08.09.2021
    A warm welcome at HZB for our bronze medal winner Felicia Laberer
    What a race! At just 20 years old, Felicia Laberer outdistanced the competition in the single kayak at the Paralympics final in Tokyo and won bronze for Germany.
  • <p>Opened! Bernd Rech (l.) and Christian Rickerts (r.) pressed the symbolic red button to start the Real Lab in Adlershof on 6 September.</p>
    News
    07.09.2021
    HZB uses electricity-producing facade wall as real laboratory

    In the presence of the State Secretary for Economic Affairs, Energy and Operations of the State of Berlin, Christian Rickerts, the HZB officially commissioned the solar façade of a new research building on 6 September 2021. What makes it so special is that the elegant façade not only generates up to 50 kilowatts of electricity (peak power). It also provides important insights into the behaviour of the solar modules under different weather conditions.  

  • <p>Bronze for Felicia Laberer! The HZB congratulates warmly on this outstanding achievement!</p>
    News
    05.09.2021
    Paralympics: Colleague Felicia Laberer wins bronze medal
    Felicia Laberer wins a bronze medal in canoeing at the 2021 Paralympics in Tokyo. We are happy with her and congratulate very much. At HZB, the 20-year-old is currently an apprentice as an office management assistant. In June, the canoeist had already earned the European Championship.

  • <p>The Dirac cone is typical for topological insulators and is practically unchanged on all 6 images (ARPES measurements at BESSY II). The blue arrow additionally shows the valence electrons in the volume. The synchrotron light probes both and can thus distinguish the Dirac cone at the surface (electrically conducting) from the three-dimensional volume (insulating).</p>
    Science Highlight
    01.09.2021
    Disorder brings out quantum physical talents
    Quantum effects are most noticeable at extremely low temperatures, which limits their usefulness for technical applications. Thin films of MnSb2Te4, however, show new talents due to a small excess of manganese. Apparently, the resulting disorder provides spectacular properties: The material proves to be a topological insulator and is ferromagnetic up to comparatively high temperatures of 50 Kelvin, measurements at BESSY II show.  This makes this class of material suitable for quantum bits, but also for spintronics in general or applications in high-precision metrology.

  • <p>During the operation of conventional battery storage, the tree-like lithium dendrites grow continuously and can pierce the electrically insulating separator layer between anode and cathode. The result: a short circuit and the end of life for the battery.&nbsp;</p>
    Science Highlight
    01.09.2021
    On the trail of lithium dendrites: How destructive formations develop in batteries
    Tiny formations inside lithium batteries can severely limit the operating life of an energy storage device. A research team at the Helmholtz-Zentrum Berlin (HZB) has now investigated the process behind these formations in greater detail. Their results provide anchor points for the future development of longer-lasting and safer lithium batteries.
  • News
    31.08.2021
    HZB Highlight Report 2019/2020 is online

    What was going on at HZB in 2019 and 2020? Quite a lot! Just take a look at our highlight report, in which we briefly present the most important scientific highlights, for example our world records for tandem solar cells, which teams from HZB were able to achieve.

  • <p>At the event, the Governing Mayor of Berlin, Michael M&uuml;ller, emphasised the role of research in solving social problems. The HZB holds a top position in Berlin, he said.</p>
    News
    30.08.2021
    Precision measurements lead to breakthroughs: HZB is planning the construction of a new accelerator-based light source

    For the 200th birthday of Hermann von Helmholtz, Helmholtz-Zentrum Berlin (HZB) is celebrating by hosting a festive event in Berlin-Adlershof. The polymath Helmholtz still inspires researchers to this day, now notably in the planning of an accelerator-based light source of the latest generation, which HZB is presenting at the event. It will generate light of special quality for research. Governing Mayor Michael Müller has stressed the importance of a new light source for the research location Berlin.

  • News
    30.08.2021
    New issue of "lichtblick" is online

    New technological solutions are needed to curb climate change. Experts agree that green hydrogen is an important building block. By joining forces with internationally renowned research partners and industry, novel catalysts are now to be developed and launched. They are crucial so that green hydrogen can be produced cheaply and efficiently. You can read more about the ambitious goals of the project on the centre page.

  • <p>The SAM layer between the perovskite semiconductor and the ITO contact consists of a single layer of organic molecules. The mechanisms by which this SAM layer reduces losses can be quantified by measuring the surface photovoltage and photoluminescence.</p>
    Science Highlight
    20.08.2021
    Perovskite solar cells: Interfacial loss mechanisms revealed

    Metal-organic perovskite materials promise low-cost and high-performance solar cells. Now a group at HZB managed to de-couple the different effects of self-assembled monolayers of organic molecules (SAMs) that reduce losses at the interfaces. Their results help to optimise such functional interlayers.

  • <p>The VSANS instrument (here in the neutron hall at BER II) will move to Penn State University.</p>
    News
    19.08.2021
    Neutron instrument VSANS will move to Penn State University, USA

    At the end of 2019, the Berlin neutron source BER II was shut down as scheduled. To ensure that the high-quality instruments can continue to be used for research, they are moving to suitable neutron sources in Germany and abroad. Now, another move has been agreed upon: The Very Small Angle Scattering Instrument (VSANS) will find a new home at the Breazeale Research Reactor at Penn State University, USA, in spring 2022.

  • <p></p> <p>Resonant X-ray excitation (purple) core excites the oxygen atom within a H<sub>2</sub>O molecule. This causes ultrafast proton dynamics. The electronic ground state potential surface (bottom) and the bond dynamics is captured by distinct spectral features in resonant inelastic X-ray scattering (right).</p> <p></p> <p></p>
    News
    18.08.2021
    Review: X-ray scattering methods with synchrotron radiation
    Synchrotron light sources provide brilliant light with a focus on the X-ray region and have enormously expanded the possibilities for characterising materials. In the Reviews of Modern Physics, an international team now gives an overview of elastic and inelastic X-ray scattering processes, explains the theoretical background and sheds light on what insights these methods provide in physics, chemistry as well as bio- and energy related themes.

  • News
    13.08.2021
    Registration open: HZB Machine Learning Summer School & Hackathon 2021

    Registration for the HZB Machine Learning Summer School is now open! Building on the great response last year, the HZB Machine Learning Summer School will be offered again in 2021. You will be able to learn from experts how to leverage machine learning to solve problems in the natural sciences and how to apply your knowledge in exciting real-world hackathon projects, all free of charge. Applications can be submitted until August 22, 2021.

  • <p>The MX team at BESSY II specialises in analysing protein structures. This can also accelerate the development of drugs against COVID-19.</p>
    News
    11.08.2021
    HZB coordinates European collaboration to develop active agents against Corona
    X-ray structure analysis at BESSY II enables the systematic testing of many thousands of molecules that could inhibit the reproduction and virulence of SARS-CoV2 viruses. Now, a team at HZB with partners from Austria and the Czech Republic has set up the NECESSITY project to investigate more than 8000 compounds in a high-throughput procedure and develop active agents against COVID-19.

  • Science Highlight
    09.08.2021
    Green hydrogen: Why do certain catalysts improve in operation?
    Crystalline cobalt arsenide is a catalyst that generates oxygen during electrolytic water splitting in the production of hydrogen. The material is considered to be a model system for an important group of catalysts whose performance increases under certain conditions in the course of electrolysis. Now a HZB-team headed by Marcel Risch has observed at BESSY II how two simultaneous mechanisms are responsible for this. The catalytic activity of the individual catalysis centres decreases in the course of electrolysis, but at the same time the morphology of the catalyst layer also changes. Under favourable conditions, considerably more catalysis centres come into contact with the electrolyte as a result, so that the overall performance of the catalyst increases.

  • Nachricht
    06.08.2021
    Mehr als nur "Fassade": Nachhaltige Energieversorgung durch Solarfassaden
    Ein Beitrag über die nachhaltige Energieversorgung durch Solarfassaden

  • <p>The development of this speckle pattern over time reveals microsocopic fluctuations in the material.</p>
    Science Highlight
    04.08.2021
    When vibrations increase on cooling: Anti-freezing observed
    An international team has observed an amazing phenomenon in a nickel oxide material during cooling: Instead of freezing, certain fluctuations actually increase as the temperature drops. Nickel oxide is a model system that is structurally similar to high-temperature superconductors. The experiment shows once again that the behaviour of this class of materials still holds surprises.

  • News
    29.07.2021
    Helmholtz anniversary exhibition opens in Potsdam

    Helmholtz, who was born in Potsdam, is considered one of the most influential natural scientists of his time. 31 August is the 200th anniversary of his birth. To mark the anniversary, the proWissen Potsdam association and the University of Potsdam, in cooperation with the Helmholtz Association, are paying tribute to Helmholtz, the polymath and genius from the Havel, with a two-part exhibition on the red construction fence next to the Education Forum and in the Science Floor in Potsdam.

  • <p>After about 5 seconds, a thin film of metallic water has formed around the NaK drop, recognisable by the golden shimmer.</p>
    Science Highlight
    28.07.2021
    Water as a metal - detected at BESSY II
    Under normal conditions, pure water is an almost perfect insulator. Water only develops metallic properties under extreme pressure, such as exists deep inside of large planets. Now, an international collaboration has used a completely different approach to produce metallic water and documented the phase transition at BESSY II. The study is published now in Nature.

  • <p>Pouch cell Lab</p>
    News
    26.07.2021
    Battery research - SkaLiS project funded with 2.2 million euros
    Powerful, compact, and affordable batteries are needed for the energy transition. Groups at the Helmholtz-Zentrum Berlin (HZB) led by Prof. Yan Lu, Dr. Ingo Manke, and Dr. Sebastian Risse are conducting this research. They are investigating and developing novel types of electrode materials based on sulphur and silicon. Risse is now also coordinating a large project involving teams from HZB as well as from the University of Potsdam near Berlin, the Technische Universität Berlin, the Technische Universität Dresden and the Fraunhofer Institute for Material and Beam Technology IWS Dresden.
  • <p>Fluoride additives increase the quality of the perovskite layer. At BESSY II a team has now explored the chemistry in detail.</p>
    Science Highlight
    26.07.2021
    Lead-free perovskite solar cells - How fluoride additives improve quality
    Tin halide perovskites are currently considered the best alternative to their lead-containing counterparts, which are, however, still significantly less efficient and stable. Now, a team led by Prof. Antonio Abate from HZB has analysed the chemical processes in the perovskite precursor solution and the fluoride compounds in detail. Using a clever combination of measurement methods at BESSY II and with NMR at the Humboldt-University Berlin, they were able to show that fluoride prevents the oxidation of tin and leads to a more homogeneous film formation with fewer defects, increasing the quality of the semiconductor layer.

  • News
    23.07.2021
    Faster development of efficient solar cells and LEDs thanks to HZB spin-off
    Scientists from the Helmholtz Innovation Lab HySPRINT at HZB spun off the technology company QYB Quantum Yield Berlin GmbH at the beginning of April 2021. The spin-off is launching LuQY Pro, a ready-to-use measurement instrument that can help develop and optimise optoelectronic components such as solar cells and LEDs in a more efficient and resource-saving manner.

  • <p>We now also offer virtual tours.</p>
    News
    23.07.2021
    Virtual visits at HZB and 360° Panorama
    Due to Corona, it is currently not possible to welcome groups of visitors at HZB and guide them through the facility. Nevertheless, we open our doors virtually for you and provide insights into research facilities and labs at HZB. Make yourself comfortable and start your own virtual tour through BESSY II. Move through 360-degree images, have a look and linger at selected stations.

  • <p>Snapshots of the electronic structure of Sb acquired with femtosecond time-resolution. Note the changing spectral weight above the Fermi energy (E<sub>F</sub>).</p>
    Science Highlight
    16.07.2021
    Future information technologies: Topological materials for ultrafast spintronics
    A team led by HZB physicist Dr. Jaime Sánchez-Barriga has gained new insights into the ultrafast response of topological states of matter to femtosecond laser excitation. Using time- and spin-resolved methods at BESSY II, the physicists explored how, after optical excitation, the complex interplay in the behavior of excited electrons in the bulk and on the surface results in unusual spin dynamics. The work is an important step on the way to spintronic devices based on topological materials for ultrafast information processing.

  • <p>Inauguration of the new research building of the Helmholtz Institute Erlangen-Nuremberg for Renewable Energies (HI ERN) in Erlangen on Wednesday 14.07.2021</p>
    News
    14.07.2021
    Hi ERN - New headquarters of the Helmholtz Institute in Erlangen inaugurated
    The Helmholtz Institute Erlangen-Nuremberg, Hi ERN, in which the HZB is involved, has moved into its new building. 

    Almost exactly four years lie between the groundbreaking ceremony and the festive inauguration: the new research building of the Helmholtz Institute Erlangen-Nuremberg for Renewable Energies (Hi ERN) is another address for cutting-edge research. 

  • News
    12.07.2021
    DAPHNE - Data for Photon and Neutron Experiments
    Data in the petabyte range are produced annually at large-scale facilities. This research data must be stored for at least ten years. Now 19 scientific institutions in Germany, among them HZB, aim to develop common standards for software, data exchange and data repositories to make research data permanently available. The DAPHNE4NFDI project will be funded over the next five years as part of the National Research Data Infrastructure and is coordinated by DESY.

  • <p>In polar regions and at high altitudes the conversion of solar radiation into hydrogen could certainly be worthwhile.</p> <p></p>
    Science Highlight
    02.07.2021
    Solar hydrogen for Antarctica - study shows advantages of thermally coupled approach
    A team from the Helmholtz-Zentrum Berlin, Ulm University, and Heidelberg University has now investigated how hydrogen can be produced at the South Pole using sunlight, and which method is the most promising. Their conclusion: in extremely cold regions, it can be considerably more efficient to attach the PV modules directly to the electrolyser, i.e. to thermally couple them. This is because the waste heat from the PV modules increases the efficiency of electrolysis in this environment. The results of this study, which has now been published in Energy & Environmental Science, are also relevant for other cold regions on Earth, such as Alaska, Canada, and high mountain regions, for example. In these places, solar hydrogen could replace fossil fuels such as oil and petrol.

  • <p>DESY researcher Wiebke Ewert shows on a so-called electron density map where a drug candidate (green) binds to the main protease of the corona virus (blue).</p>
    News
    29.06.2021
    Synchrotrons accelerate corona research
    Information by the German Committee Research with Synchrotron Radiation (KFS).

    Synchrotron light sources were originally built to study particles. Today, they are even used in the fight against COVID-19. The projects are as diverse as the fields of the synchrotron users, who come from universities, research institutions and companies like BioNTech.

  • <p>Cover of the Helmholtz Photon Science Roadmap.</p>
    News
    28.06.2021
    Tailwind for top research in Germany

    Three research centres in the Helmholtz Association have developed a joint future plan for the research conducted at the scientific light sources they operate in Hamburg, Berlin and Dresden. The upgrades proposed in the strategy for their world-class accelerator-based facilities will strengthen Germany as a research location and promote innovations in many different fields. The strategy paper was presented on 28 June at the Helmholtz Symposium “Research Infrastructures of the Future” as a component of the Helmholtz Roadmap.

  • <p></p> <p>VIPERLAB is funded under the European Programme for Research and Innovation Horizon 2020 (Grant No 101006715).</p> <p></p>
    News
    24.06.2021
    VIPERLAB: EU project aims to boost perovskite solar industry in Europe
    The HZB is coordinating a major European collaborative project to open up new opportunities for the European solar industry. The VIPERLAB project involves 15 renowned research institutions from Europe, as well as Switzerland and Great Britain. It will be funded within the framework of the EU's Horizon 2020 programme for the next three and a half years with a total of 5.5 million euros, from which the HZB will receive just under 840,000 euros. 

  • <p>Around the catalytic centre is a group of molecules, the gating domain, which can occupy two different positions.</p>
    Science Highlight
    21.06.2021
    BESSY II: universal mechanism of regulation in plant cells discovered
    In pioneering work, a German-Japanese research team at BESSY II has been able to determine the 3D structure of a metalloprotein that plays an important role as a catalyst in all plant cells. This involves the DYW deaminase domain of what is referred to as the RNA editosome. The DYW domain alters messenger RNA nucleotides in chloroplasts and mitochondria and contains a zinc ion whose activity is controlled by a very unusual mechanism. The team has now been able to describe this mechanism in detail for the first time. Their study, published in Nature Catalysis, is considered a breakthrough in the field of plant molecular biology and has far-reaching implications for bioengineering.

  • <p>The launch event for the opening of the CatLab took place on 21 June.</p> <p>f.l.t.r.: Prof. Dr. Bernd Rech (HZB), Dr. Stefan Kaufmann (BMBF), Prof. Dr. Robert Schl&ouml;gl (MPG)</p>
    News
    21.06.2021
    CatLab - Starting signal for a new generation of catalysts
    The Helmholtz-Zentrum Berlin (HZB) and the Max Planck Society (MPG) are launching CatLab, their new joint catalysis research centre in Berlin. The inauguration ceremony took place on June 21st in the presence of Dr. Stefan Kaufmann, the Innovation Officer for Green Hydrogen at the Federal Ministry of Education and Research (BMBF) and Member of the federal Bundestag. High-ranking representatives from science, government, and industry took part.
  • <p>Using Small-Angle Scattering the early stages of structure formation in precursor solutions of perovskite solar cells have been explored.</p>
    Science Highlight
    18.06.2021
    Perovskite Solar Cells: Insights into early stages of structure formation
    Using small-angle scattering at the PTB X-ray beamline of BESSY II, an HZB team was able to experimentally investigate the colloidal chemistry of perovskite precursor solutions used for solar cell production. The results contribute to the targeted and systematic optimization of the manufacturing process and quality of these exciting semiconductor materials.

  • <p>The illustration shows two quantum dots "communicating" with each other by exchanging light.</p>
    Science Highlight
    03.06.2021
    How quantum dots can "talk" to each other

    A group at HZB has worked out theoretically how the communication between two quantum dots can be influenced with light.  The team led by Annika Bande also shows ways to control the transfer of information or energy from one quantum dot to another. To this end, the researchers calculated the electronic structure of two nanocrystals, which act as quantum dots. With the results, the movement of electrons in quantum dots can be simulated in real time.

  • <p>Renske van der Veen has a lot of experience with ultrafast x-ray measurements.</p>
    News
    02.06.2021
    Renske van der Veen heads new department "Atomic Dynamics in Light-Energy Conversion"
    From June 2021, Dr. Renske van der Veen is setting up a new research group at HZB. The chemist is an expert in time-resolved X-ray spectroscopy and electron microscopy and studies catalytic processes that enable the conversion of solar energy into chemical energy.

  • <p>View into a MOF crystal exemplified by DUT-8. The massive pores are clearly discernible.</p>
    Science Highlight
    27.05.2021
    BESSY II: New insights into switchable MOF structures at the MX beamlines
    Metal-organic framework compounds (MOFs) are widely used in gas storage, material separation, sensor technology or catalysis. A team led by Prof. Dr. Stefan Kaskel, TU Dresden, has now investigated a special class of these MOFs at the MX beamlines of BESSY II. These are "switchable" MOFs that can react to external stimuli. Their analysis shows how the behaviour of the material is related to transitions between ordered and disordered phases. The results have now been published in Nature Chemistry.

  • <p>Orbital hybridization between organic and inorganic components of MAPI perovskite in ground-state geometry.</p>
    Science Highlight
    26.05.2021
    Perovskite solar cells: Hydrogen bonds measured
    The evaluation of X-ray measurements on methylammonium perovskite semiconductors now shows what role hydrogen bonds play in these materials. In addition, the HZB team showed that radiation damage by soft X-rays to this sensitive class of materials occurs even faster than often expected. Both results provide important information for perovskites materials research for solar cells.

  • <p>Prof. Dr. Udo Heinemann works at the Max Delbr&uuml;ck Center for Molecular Medicine and initiated the setting up of the MX beamlines almost 20 years ago. His group contributed more than 250 structures to the Protein Data Bank.</p>
    Interview
    11.05.2021
    “The gain in insights for structural biology has continued for five decades”

    Prof. Dr. Udo Heinemann works at the Max Delbrück Center for Molecular Medicine, where he has been researching in structural biology for 40 years. From 2008 to 2012, he was a member of the Advisory Board for the Protein Data Bank in Europe. In an interview, he speaks of the value added by the Protein Data Bank for research today, and why it is important that there are specialised beamlines for structural biology analysis in Berlin.

  • Nachricht
    07.05.2021
    Hörtipp: Genies – das Vermächtnis von Virchow und Helmholtz

    Wir möchten Ihnen eine interessante Folge des rbb-Podcast „Talking Science“ empfehlen: Die beiden Universalgenies Rudolf Virchow und Hermann von Helmholtz haben die Wissenschaft am Ende des 19. Jahrhunderts geprägt. Ohne sie hätten wir heute weder eine Kanalisation noch den Magnetresonanztomografen. Was können wir von den beiden für unsere heutige Zeit lernen?

  • <p>CIGS PV modules are integrated into the fa&ccedil;ade of the HZB testing hall in Berlin-Adlershof. A team analyses the yield and development of the modules under real conditions.</p>
    News
    23.04.2021
    Berlin Energy Days: Integrated photovoltaics - active areas for the energy transition
    The energy transition needs photovoltaics, and photovoltaics need space. There are large areas that have hardly been used so far: For example, solar cells can be integrated into the shell of buildings and vehicles, or installed in traffic routes, over farmland and flooded opencast mines. On Wednesday, 28 April 2021, experts from the HZB consulting office for builiding integrated PV (BAIP) and other research institutions will present these options. The event will take place as part of the Berlin Energy Days, and participation is free of charge after registration.
  • <p class="MsoListParagraph">The first image taken by MYSTIIC: a standard image used to calibrate and measure the resolution of the new STXM.</p>
    News
    22.04.2021
    MYSTIIC at BESSY II: New X-ray microscope put into operation
    A new X-ray microscope has started operation at the Energy Materials in situ Lab (EMIL). It is a scanning transmission X-ray microscope designed to examine both sample surfaces and bulk sample. With the soft X-ray light from BESSY II, it is even possible to localise individual elements and chemical compounds; the spatial resolution is below 20 nanometres.

  • <p>From the measurement data, the team was able to determine that the xenon atoms first accumulate on the inner walls of the pores (state 1), before they fill them up (state 2). The X-ray beam penetrates the sample from below.</p>
    Science Highlight
    21.04.2021
    Direct observation of the ad- and desorption of guest atoms into a mesoporous host
    Battery electrodes, storage devices for gases, and some catalyst materials have tiny functional pores that can accommodate atoms, ions, and molecules. How these guest atoms are absorbed into or released from the pores is crucial to understanding the porous materials' functionality. However, usually these processes can only be observed indirectly. A team from the Helmholtz Zentrum Berlin (HZB) has employed two experimental approaches using the ASAXS instrument at the PTB X-ray beamline of the HZB BESSY II synchrotron to directly observe the adsorption process of atoms in a mesoporous model system. The work lays the foundations for new insights into these kinds of energy materials.

  • <p>The HZB team was able to determine the photoconductivity in the thin layers of rust using time-resolved microwave measurements; here is a picture of the measurement setup.</p>
    Science Highlight
    19.04.2021
    Green hydrogen: "Rust" as a photoanode and its limits
    Metal oxides such as rust are intriguing photoelectrode materials for the production of green hydrogen with sunlight. They are cheap and abundant, but in spite of decades of research, progress has been limited. A team at HZB, together with partners from Ben Gurion University and the Technion, Israel, has now analysed the optoelectronic properties of rust (haematite) and other metal oxides in unprecedented detail. Their results show that the maximum achievable efficiency of haematite electrodes is significantly lower than previously assumed. The study demonstrates ways to assess new photoelectrode materials more realistically.

  • News
    15.04.2021
    Virtual tours: Experience the HZB in 360 degrees!

    Unfortunately, due to Corona, we are currently unable to receive groups of visitors at HZB and guide them through our centre. Despite Corona, we would like to provide you with insights into HZB. Simply follow our 360-degree tours and experience how we conduct research at the BESSY II accelerator. Further tours are being planned.

  • <p>Electron density map of the most antiviral active ingredient calpeptin (yellow) binding at the main protease.</p>
    Science Highlight
    06.04.2021
    X-ray lightsource at DESY identifies promising candidates for COVID drugs
    At DESY's high-brilliance X-ray light source PETRA III, a team from more than 30 research institutions has identified several candidates for active substances against the coronavirus SARS-CoV-2. They bind to an important protein of the virus and could thus be the basis for a drug against Covid-19. The MX team from HZB examined part of the measurement data with special analysis algorithms in order to identify suitable active substances. The study has now been published in the renowned journal Science.

  • <p>An impression of the placoderm fish living 380 million years ago.</p>
    Science Highlight
    31.03.2021
    Tomography brings insights into the early evolution of bones
    Modern biology considers bone cells (osteocytes) as essential for bone development and health. However, when bone initially evolved some 400-million years ago, it did not contain bone cells. So why did bone cells evolve? Why was it so advantageous that most subsequent vertebrates have bone cells? A joint team of palaeontologists at Berlin’s natural history museum has now for the first time analysed these structures in 400 million-year-old fossils of marine life at unprecedentedly high resolution and in 3D. To be able to view these structures, tomography experts at the Helmholtz-Zentrum Berlin (HZB) examined the samples under the focussed ion beam of a scanning electron microscope to calculate 3D images from the data, achieving resolutions in the nanometre range using technology that was initially developed to study battery corrosion.

     

  • <p>Movie showing the 3D crystal structure as a function of the cell modulation phase. (grey: Pb, brown: Br, black: C, blue: N; white: H)</p>
    Science Highlight
    22.03.2021
    New insights into the structure of organic-inorganic hybrid perovskites
    In photovoltaics, organic-inorganic hybrid perovskites have made a rapid career. But many questions about the crystalline structure of this surprisingly complex class of materials remain unanswered. Now, a team at HZB has used four-dimensional modelling to interpret structural data of methylammonium lead bromide (MAPbBr3), identifying incommensurable superstructures and modulations of the predominant structure. The study is published in the ACS Journal of Physical Chemistry Letters and was selected by the editors as an Editor's Choice.

  • <p>Radio TEDDY presenter Leo hosts the "Experimentierkasten" on air and explains everything very simply so that everyone can join in.</p>
    News
    18.03.2021
    The Radio TEDDY experimental show with the HZB - tune in on Saturdays at 2.40 pm!

    The Helmholtz-Zentrum Berlin and Radio TEDDY continue their successful cooperation. In the next round, we will provide ideas for six exciting experiments that the Radio TEDDY moderator Leo will conduct for the children in front of the radio. Participating, having fun and arousing curiosity - that's the top priority. Tune in now: every Saturday at 2.40 p.m. and of course you can also listen to the programme online.

  • News
    18.03.2021
    New issue of "lichtblick" online
    The new issue of lichtblick is about many things that are currently driving us at the Centre: we show that our staff continue to be very creative in their dealings with Corona and are doing everything they can to ensure that research can continue - for example, the development of new prototypes for accelerator components.
  • <p></p> <p>A conductive AFM tip is used to scan the sample surface of an a-Si:H/c-Si interface under ultra-high vacuum on the nm scale, revealing the transport channels of the charge carriers via defects in the a-Si:H (red states in the magnified section).</p> <p></p>
    Science Highlight
    17.03.2021
    Solar cells: Losses made visible on the nanoscale
    Solar cells made of crystalline silicon achieve peak efficiencies, especially in combination with selective contacts made of amorphous silicon (a-Si:H). However, their efficiency is limited by losses in these contact layers. Now, for the first time, a team at Helmholtz-Zentrum Berlin (HZB) and the University of Utah, USA, has experimentally shown how such contact layers generate loss currents on the nanometre scale and what their physical origin is. Using a conductive atomic force microscope, they scanned the solar cell surfaces in ultra-high vacuum and detected tiny, nanometre-sized channels for the detrimental dark currents, which are due to disorder in the a-Si:H layer.

  • <p>The new audit logo for long-time certified companies</p>
    News
    17.03.2021
    HZB re-certified as a compatibility-friendly company again
    HZB has been certified as a family-friendly employer since 2011. Now the research centre has successfully completed the re-auditing process and developed further measures to promote a life phase conscious working culture. The certificate is considered a seal of quality for the company's compatibility policy and is awarded by the board of trustees of berufundfamilie Service GmbH.
  • <p></p> <p>A new instrument at BESSY II can be used to study molybdenum-sulfide thin films that are of interest as catalysts for solar hydrogen production. A light pulse triggers a phase transition from the semiconducting to the metallic phase and thus enhances the catalytic activity.</p> <p></p>
    Science Highlight
    05.03.2021
    Instrument at BESSY II shows how light activates MoS2 layers to become catalysts
    Thin films of molybdenum and sulfur belong to a class of materials that can be considered for use as photocatalysts. Inexpensive catalysts such as these are needed to produce hydrogen as a fuel using solar energy. However, they are still not very efficient as catalysts. A new instrument at the Helmholtz-Berlin Zentrum’s BESSY II now shows how a light pulse alters the surface properties of the thin film and activates the material as a catalyst.

  • <p></p> <p>Electron microscopy shows the graphene sample (gray) in which the helium beam has created a hole pattern so that the density varies periodically. This results in the superposition of vibrational modes and the emergence of a mechanical band gap. The frequency of this phononic system can be adjusted between 50 MHz and 217 MHz by mechanical tension.&nbsp;</p> <p></p>
    Science Highlight
    01.03.2021
    New skills of Graphene: Tunable lattice vibrations
    Technological innovation in the last century was mainly based on the control of electrons or photons. Now, in the emerging research field of phononics, phonons or vibrations of the crystal lattice attract attention. A team at Freie Universität Berlin and Helmholtz-Zentrum Berlin showed a graphene-based phononic crystal whose resonant frequency can be tuned over a broad range and has used a helium-ion microscope to produce such a crystal. This is a real breakthrough in the field of phononics, now published in Nano Letters.

  • <p>Artificial and natural interzones on a tooth restored with non-degradable biomaterials are exposed to mechanical (left: stresses acting in compression, tension and shear) and biological challenges (right: bacterial attachment, penetration, and other interactions with biological media).</p>
    News
    26.02.2021
    Dental materials science: HZB is part of a research project funded by DFG
    How can dental restorations – such as fillings and crowns – be made to last longer? A new research group centered at Charité – Universitätsmedizin Berlin and Technische Universität (TU) Berlin plans to address this topic by utilizing approaches from both materials science and dentistry. The interdisciplinary ‘InterDent’ research group is funded by the German Research Foundation (DFG). It will receive an initial funding of €2.1 million Euro over three years. Partners also include the Helmholtz-Zentrum Berlin (HZB) and the Max Planck Institute of Colloids and Interfaces (MPI-KG).

  • Science Highlight
    24.02.2021
    Accelerator physics: Experiment reveals new options for synchrotron light sources
    An international team has shown through a sensational experiment how diverse the possibilities for employing synchrotron light sources are. Accelerator experts from the Helmholtz-Zentrum Berlin (HZB), the German federal metrology institute Physikalisch-Technische Bundesanstalt (PTB), and Tsinghua University in Beijing have used a laser to manipulate electron bunches at PTB's Metrology Light Source so that they emitted intense light pulses having a laser-like character. Using this method, specialised synchrotron radiation sources would potentially be able to fill a gap in the arsenal of available light sources and offer a prototype for industrial applications. The work was published on 24 February 2021 in the leading scientific publication Nature.

  • <p>Overview: Number of patients treated with prontons at HZB from 1998 to 2020.&nbsp;&nbsp;</p>
    News
    24.02.2021
    The 4000th eye tumour patient treated with protons at HZB

    On 19 February 2021, the 4000th eye tumour patient received irradiation with protons, performed by a joint team from Helmholtz-Zentrum Berlin (HZB) and Charité - Universitätsmedizin Berlin. The number of patients treated in 2020 remained at the previous year's level despite the more difficult corona conditions. The treatment in Berlin-Wannsee is only available for uveal melanomas of the eye. The proton accelerator at HZB is the only therapy site for this disease in Germany.

  • <p>The liquid solution of perovskite precursor, solvent, and additive flows from a slit-shaped nozzle onto the glass substrate being conveyed below.</p>
    Science Highlight
    22.02.2021
    The perfect recipe for efficient perovskite solar cells
    A long-cherished dream of materials researchers is a solar cell that converts sunlight into electrical energy as efficiently as silicon, but that can be easily and inexpensively fabricated from abundant materials. Scientists at the Helmholtz-Zentrum Berlin have now come a step closer to achieving this. They have improved a process for vertically depositing a solution made from an inexpensive perovskite solute onto a moving substrate below. Not only have they discovered the crucial role played by one of the solvents used, but they have also taken a closer look at the aging and storage properties of the solution.

  • Science Highlight
    10.02.2021
    World's first video recording of a space-time crystal
    A German-Polish research team has succeeded in creating a micrometer-sized space-time crystal consisting of magnons at room temperature. With the help of the scanning transmission X-ray microscope MAXYMUS at Bessy II at Helmholtz Zentrum Berlin, they were able to film the recurring periodic magnetization structure in a crystal. The research project was a collaboration between scientists from the Max Planck Institute for Intelligent Systems (MPI-IS) in Stuttgart, Germany, the Adam Mickiewicz University and the Polish Academy of Sciences in Poznań in Poland.

  • News
    04.02.2021
    The HZB Graduate Center is here now
    The HZB “DR coordination” is now the HZB Graduate Center. Since the beginning of 2018, the DR coordination has been continuously expanding the offers and standards at the HZB for doctoral researchers and their advisors. The ideas and suggestions that were collected in discussions with numerous stakeholders and in various HZB committees on this topic are leading the path and are incorporated in the set up of a uniform HZB-wide umbrella structure for doctoral researchers and their advisors - the HZB Graduate Center.

  • <p>The electronic structure of complex molecules can be assessed by the method of resonant inelastic X-ray scattering (RIXS) at BESSY II.</p>
    Science Highlight
    28.01.2021
    An efficient tool to link X-ray experiments and ab initio theory
    The electronic structure of complex molecules and their chemical reactivity can be assessed by the method of resonant inelastic X-ray scattering (RIXS) at BESSY II. However, the evaluation of RIXS data has so far required very long computing times. A team at BESSY II has now developed a new simulation method that greatly accelerates this evaluation. The results can even be calculated during the experiment. Guest users could use the procedure like a black box.

  • <p>TEM-Image of a &alpha;-SnWO<sub>4 </sub>film (pink) coated with 20 nm NiO<sub>x </sub>(green). At the interface of &alpha;-SnWO<sub>4</sub> and NiO<sub>x</sub> an additional interfacial layer can be observed.</p>
    Science Highlight
    26.01.2021
    Solar hydrogen: Photoanodes made of α-SnWO4 promise high efficiencies
    Photoanodes made of metal oxides are considered to be a viable solution for the production of hydrogen with sunlight. α-SnWO4 has optimal electronic properties for photoelectrochemical water splitting with sunlight, but corrodes easily. Protective layers of nickel oxide prevent corrosion, but reduce the photovoltage and limit the efficiency. Now a team at HZB has investigated at BESSY II what happens at the interface between the photoanode and the protective layer. Combined with theoretical methods, the measurement data reveal the presence of an oxide layer that impairs the efficiency of the photoanode.


  • <p>The phonons distribution is complex (upper curves) and then simplifies with time to a Gaussian bell curve (lower curve).</p>
    Science Highlight
    25.01.2021
    How complex oscillations in a quantum system simplify with time
    With a clever experiment, physicists have shown that in a one-dimensional quantum system, the initially complex distribution of vibrations or phonons can change over time into a simple Gaussian bell curve. The experiment took place at the Vienna University of Technology, while the theoretical considerations were carried out by a joint research group from the Freie Universität Berlin and HZB.

  • <p>Part of the IRIS research labs will be equipped for research on catalysts. Photo</p>
    News
    25.01.2021
    HZB and Humboldt University agree to set up a catalysis laboratory
    Helmholtz-Zentrum Berlin (HZB) and Humboldt-Universität zu Berlin (HU) have signed a cooperation agreement with the aim of establishing a joint research laboratory for catalysis in the IRIS research building of HU in Adlershof. The IRIS research building offers optimal conditions for the research and development of complex material systems.

  • News
    19.01.2021
    Call for Application “Helmholtz young investigator groups”

    We are looking for young excellent scientists looking for leadership! To participate in the pre-selection, please apply with a two-page outline of your project by February 28, 2020.

  • Nachricht
    12.01.2021
    21.01.: Seminar zu klimaneutralem Planen, Bauen und Betreiben
    Bauwerkintegrierte Photovoltaik (BIPV) bietet in Städten und Gemeinden enorme Möglichkeiten, aktiv zum Klimaschutz beizutragen. Im Seminar geht es um die baurechtlichen Anforderungen, den Brandschutz und den Einsatz verschiedener PV-Materialien.

  • News
    07.01.2021
    Corona Update 07.01.2021 / restriced operation
    After careful assessment of the situation, the HZB management has decided that HZB continue to operate in a very restricted mode. From 11.01.2021 on, the laboratories and BESSY II are opened exclusively for in-house research. Eye tumor therapy continue to take place.
  • <p>For the measurement campaign, two couplers were mounted in a horizontal test position under a local clean room tent.</p>
    News
    07.01.2021
    Accelerator Physics: HF-Couplers for bERLinPro prove resilient
    In synchrotron light sources, an electron accelerator brings electron bunches to almost the speed of light so that they can emit the special "synchrotron light". The electron bunches get their enormous energy and their special shape from a standing electromagnetic alternating field in so-called cavities. With high electron currents, as required in the bERLinPro project, the power needed for the stable excitation of this high-frequency alternating field is enormous. The coupling of this high power is achieved with special antennas, so-called couplers, and is considered a great scientific and technical challenge. Now, a first measurement campaign with optimised couplers at bERLinPro shows that the goal can be achieved.

  • News
    18.12.2020
    December issue of lichtblick
    On the cover, we introduce Catherine Dubourdieu, who is not only an excellent researcher but also likes the craftsmanship in her work.

  • <p>Martin Bluschke (MPI for Solid State Research, TU Berlin) receives the Ernst Eckhard Koch Prize from Mathias Richter for his outstanding dissertation.</p>
    News
    15.12.2020
    Ernst Eckhard Koch Prize and Innovation Award Synchrotron Radiation
    This year, the Friends of HZB awarded the Ernst Eckhard Koch Prize to Dr. Martin Bluschke (MPI for Solid State Research and TU Berlin) for his outstanding doctoral thesis. The European Innovation Award for Synchrotron Radiation went to a team of four physicists for their work on the FERMI free electron laser at the Elettra synchrotron source in Trieste. The award ceremony took place at this year's HZB user meeting, which had to be held digitally this year.
  • <p>The illustration visualizes the composition of the tandem solar cell.</p>
    Science Highlight
    11.12.2020
    Perovskite/silicon tandem solar cells on the threshold of 30% efficiency
    An HZB team has published a report in the journal Science on the development of its current world record of 29.15% efficiency for a tandem solar cell made of perovskite and silicon. The tandem cell provided stable performance for 300 hours – even without encapsulation. To accomplish this, the group headed by Prof. Steve Albrecht investigated physical processes at the interfaces to improve the transport of the charge carriers.

  • <p>Two structure powder diffractometers next to each other: the high structure powder diffractometer SPODI (above) in the MLZ experimental hall will be neighbouring FIREPOD.</p>
    News
    11.12.2020
    Two neutron instruments from HZB move to Munich
    At the end of 2019, the neutron source used for materials research at the Helmholtz-Zentrum Berlin (HZB) was shut down as planned. Now the Heinz Maier-Leibnitz Zentrum (MLZ) in Munich is taking over two scientific instruments from the HZB. The Federal Ministry of Science and Research (BMBF) is funding the relocation and adaptation with 5.62 million euros.