News and press releases 2015

  • <p>Composite Raman intensity-distribution map on a polycrystalline CuInSe<sub>2</sub> thin film.Credit: HZB</p>18.12.2015

    Alternative method for the representation of microstructures in polycrystalline materials

    Also Raman microspectroscopy in an optical microscope provides the means to determine local crystal orientations of polycrystalline materials over large sample areas. This method can be used alternatively to electron backscatter diffraction in a scanning electron microscope. It was shown by a team from Helmholtz-Zentrum Berlin and the Federal Institute for Materials Research and Testing (BAM) that both characterization techniques result in similar orientation distribution maps on areas of several hundreds of square micrometers. [...].

  • <p>Dr. Robert Streubel (rechts) zusammen mit Prof. Mathias Richter vom Freundeskreis Helmholtz-Zentrum Berlin w&auml;hrend der Verleihung des Ernst-Eckhard-Koch-Preis am 10. Dezember 2015 in Berlin-Adlershof. Foto: Phil Dera/HZB</p>16.12.2015

    Ernst-Eckhard-Koch-Preis und Innovationspreis Synchrotronstrahlung


    Am 10. Dezember 2015 vergab während des 7. BER II und BESSY II Nutzertreffens der Freundeskreis Helmholtz-Zentrum Berlin zum 25. mal den Ernst-Eckhard-Koch-Preis für eine herausragende Promotionsarbeit auf dem Gebiet der Forschung mit Synchrotronstrahlung. [...].

  • <p>Das Berliner Buffet nach der Postersession am Donnerstagabend dauerte noch bis sp&auml;t in die Nacht. Bild: Phil Dera/HZB</p>16.12.2015

    Posterpreise beim Usermeeting


    Vom 9. bis 11. Dezember haben sich über 320 Wissenschaftlerinnen und Wissenschaftler aus der Nutzerschaft und dem HZB getroffen, um sich über die Forschung und Instrumentierung an BESSY II und BER II auszutauschen. Dabei wurden auch Posterpreise vergeben. [...].

  • <p>Hier geht's zur <a href="/media/media/aktuell/print//lichtblick/141/hzb_lichtblick_dezember-2015_extern_web.pdf" class="Extern">Ausgabe Dezember 2015</a></p>15.12.2015

    Neuer Lichtblick erschienen


    Eine drei Viertel Million hat Annika Bande eingeworben und ist damit an das HZB gekommen. Bei ihrer Forschung zeigt sie sich experimentierfreudig und probiert als Grenzwanderin zwischen Physik und Chemie ganz neue Ideen aus. In der Titelgeschichte erzählt die 36-jährige Mutter von zwei Kindern, warum das Festklammern an Standardabläufen nicht ihr Ding ist. [...].

  • <p>2. Platz Publikumspreis<br />Fotocredit: Doris Krock/HZB<br />Titel: "The elephant"</p> <p></p>14.12.2015

    Ausstellung bei BESSY II: Die besten Bilder vom HZB Science Photo Walk


    Die 20 besten Bilder vom HZB Science Photo Walk sind ab sofort bis März 2016 in einer Ausstellung bei BESSY II für die Öffentlichkeit zu besichtigen. Am 15. Dezember 2015 wurden die Preise bei der Vernissage an die Fotografen übergeben.  [...].

  • <p>x-ray diffraction on pure 4T, colored for chrismas reasons. Credit: HZB</p>14.12.2015

    Doped organic semiconductors explored

    Organic semiconductor materials are already being employed today in solar cells and organic LEDs (OLEDs) amongst others. Until now, however, little was known about how the doping molecules are integrated into the chemical structure of organic semiconductors. The Molecular Systems Joint Research Team of the Helmholtz-Zentrum Berlin and Humboldt-Universität zu Berlin at BESSY II have now analysed this with surprising results. The molecules are not necessarily uniformly dispersed in the host lattice, as it is usual with inorganic semiconductors, but instead form what are known as co-crystallites. The doped organic semiconductor consists of a matrix of undoped crystallites in which such “mixed crystallites” are embedded. It is this very species that takes over the role as the actually doping molecule. The results were published in Nature Communications [...].

  • <p>Participants of the European Workshop on Nanophotonics for Solar Energy. Credit: HZB</p>11.12.2015

    European Workshop on Nanophotonics for Solar Energy

    On 25 and 26 November 2015, about 40 researchers from seven European countries visited Helmholtz-Zentrum Berlin to attend the “European Workshop on Nanophotonics for Solar Energy”. [...].

  • <p>MXcuBE Meeting from 1st - 2nd of December 2015 at Alba, Barcelona. The meetings make sure that the devenlopment of MXcuBE3 closly fits to the needs of the users.&nbsp;</p> <p>Photo: <span>Jordi Juanhuix/ALBA</span></p>09.12.2015

    Common platform for macromolecular crystallography at European synchrotrons

    Researchers use high-intensity X-ray light from synchrotron radiation sources to decipher the structures of biological molecules and thus the blueprints of life. A cooperation agreement has been effective since 2012 to establish common software standards at several European sources. Its aim: The eight synchrotrons involved want to create user-friendly, standardised conditions at the 30 experimental stations for macromolecular crystallography, which will greatly facilitate the work of research groups. In the new project “MXCuBE3”, the existing software platform is being adapted to include the latest developments in technology. [...].

  • 09.12.2015

    Invitation to the HZB Science Slam: TODAY at 18.30 o’clock in Adlershof

    We invite you to the HZB Science Slam that takes place today at 18.30 o’clock at the Melli Beese Kabinett (Adlershof Forum). Three scientists present their topics in an understandable, entertaining and concise way and, moreover, in only 10 minutes. The audience is the judge and jury, voting using numbered cards. This participation provokes discussion as they begin to talk about science and the presentation. The Science Slam is part of the HZB User Meeting. We are looking forward to welcome you! [...].

  • <p>Usermeetings offer a platform for exchange and communication. Credit: M- Setzpfand/HZB</p>07.12.2015

    Three days for exchange between Users of BESSY II and BER II and HZB-scientists

    The Seventh Joint BER II and BESSY II User Meeting will take place at WISTA, Berlin-Adlershof on December 9th and 10th, the neutrons session are at Berlin-Wannsee on December 11th. The Verein Freundeskreis Helmholtz-Zentrum Berlin e.V. will bestow the Innovation Award and the Ernst-Eckart-Koch Prize. Public highlights are a science slam on Wednesday, 18:30 and the public lecture by David Cahen on the power of science to bridge ideological differences (“Science: Bridge over troubled water“, Thursday 17:00). The public lecture and the science slam are open for everybody. [...].

  • <p>Gewinnerbild und 3. Platz Publikumspreis<br />Titel: "Weltraum"<br />Foto: Holger Fehsenfeld</p>01.12.2015

    HZB Science-Photowalk - Holger Fehsenfeld gewinnt mit "Weltraum" Foto


    Zum zweiten Mal lud das Helmholtz-Zentrum Berlin am 6. November 2015 Hobbyfotografen zu einem Fotospaziergang durch die Labore und den Elektronenspeicherring ein. 47 Fotografen haben fast 200 Wettbewerbsbilder eingereicht.  Aus diesen hat eine Jury Top 20 Fotos ausgewählt. Das Siegerbild mit dem Titel „Weltraum" hat Holger Fehsenfeld aufgenommen. [...].

  • <p>On stage for the PVSEC-25 Paper Awards. Jan-Peter B&auml;cker (1. on left side) and Marc Daniel Heinemann (5. on left side).</p>26.11.2015

    PVcomB-25 paper awards for two HZB-Contributions

    At the 25th International Photovoltaic Science & Engineering Conference (PVSEC) two papers from the HZB-Institute PVcomB have been awarded: Jan-Peter Bäcker and Marc Daniel Heinemann received the PVSEC-25 Paper Award for their research on chalcogenide solar cells (CIGS). The PVSEC was held from 15. to 20. November in Busan, Korea. [...].

  • <p>Nanostructures of silicon shown in scanning electron microscope image. The diameter of the nanocolumns is 570 nm. By comparison, the nanocones taper from their upper diameter of 940 nm down to 360 nm at their base. Credit: MPL</p>26.11.2015

    Whispering gallery modes in Silicon nanocones intensify luminescence

    Silicon, a semiconducting material, reveals new talents when reduced to nanoscopic dimensions. A joint team at the HZB Institute of Nanoarchitectures for Energy Conversion and the Max Planck Institute for the Science of Light (MPL) has demonstrated this. Silicon nanocones generate 200 times as much infrared luminescence as comparably sized nanocolumns when excited by visible light. Modelling and experimental results show that due to their geometry, cones are able to sustain what is referred to as whispering gallery modes at infrared wavelengths which can intensify the silicon luminescence. New applications are conceivable, including silicon-based nanolasers. [...].

  • <p>Sketch of the new set-up at EDDI. The high-speed camera (blue box) is on top of the sample holder. Credit: Marlen Paeplow/HZB</p>19.11.2015

    Filming microscopic and macroscopic changes within materials

    The EDDI beamline at BESSY II is now offering even more options. It has recently become possible to also obtain high-resolution three-dimensional images of microscopic structure with it, up to four such tomographies per second are possible. X-ray diffraction (energy-dispersive diffraction) can simultaneously be carried out to draw conclusions about the crystal structure of the material just as before. [...].

  • 19.11.2015

    Distinguished Lectures at HZB: Prof. T. Krauss will talk about Photovoltaics and Photonic nanostructures

    Solar power has the highest potential among all renewable energy sources, it is clean and practically inexhaustible. Despite the already very high performance of silicon solar cells with 25% efficiency and low costs, a lot of research is yet required in order to realise the vision of a solar-powered society. Can we reduce module cost by integrating solar cells into buildings? Can we improve efficiency without increasing cost, by adding low-cost materials such as perovskites? What role can photonic nanostructures play to help control the flow of light? [...].

  • <p>Photo: HZB/M. Setzpfandt</p>18.11.2015

    ZEISS and the Helmholtz Zentrum Berlin establish partnership

    Nanotechnology in support of leading research on renewable energy

    To conduct cutting-edge research on novel materials with the most modern ZEISS electron microscopes available – that is the mission of the ZEISS labs@location at the Helmholtz-Zentrum Berlin (HZB). The laboratories that have been set up for the Institute of Nano-Architectures for Energy Conversion, headed by Prof. Silke Christiansen, were officially opened on Monday, November 16, 2014. [...].

  • <p>Kunst und Wissenschaft - ein inspirierendes Duo. Physiker Paul Goslawski (HZB) tr&auml;gt bei der Ausstellung der K&uuml;nstlerin Alicja Kwade vor.</p>17.11.2015

    HEUTE: Kunst und Wissenschaft - Dr. Paul Goslawski trägt am 17. November 2015 im Haus am Waldsee vor


    Kunst und Wissenschaft gehören auf dem ersten Blick nicht unbedingt zusammen, dennoch verbindet beide Welten viel. Dr. Paul Goslwaski, Beschleunigerforscher am HZB, trägt im Rahmen der Ausstellung "Alicja Kwade – Monolog aus dem 11ten Stock" im Haus am Waldsee vor. Dabei arbeitet er Berührungspunkte zwischen Kunst und seiner Forschung heraus: Er spricht über Beschleuniger, Kommunikation und Physik – und über das Beste, was die Physik zu bieten hat. Das Haus am Waldsee zählt zu den führenden Austellern für internationale zeitgenössische Kunst in Deutschland. [...].

  • <p>Anziehend oder absto&szlig;end? Viel Spa&szlig; hatten die Sch&uuml;lerinnen und Sch&uuml;ler mit der mit Magneten best&uuml;ckten Duplo-Eisenbahn. Foto: HZB/S.Zerbe</p>17.11.2015

    Helmholtz-Tag im HZB-Schülerlabor


    Die Schülerlabore der Helmholtz-Gemeinschaft veranstalten am 17. November zum vierten Mal den Helmholtz-Tag. Mit dabei ist auch das Helmholtz-Zentrum Berlin. Schülerinnen und Schüler erhalten einen Einblick in die Forschungsarbeit von Hermann von Helmholtz und können in den Laboren selbst experimentieren. Der Namenspatron der Helmholtz-Gemeinschaft gehörte zu den bedeutendsten Naturwissenschaftlern des 19. Jahrhunderts. [...].

  • <p>Prof. Andreas Jankowiak beim Spatenstich f&uuml;r bERLinPro</p>13.11.2015

    rbb-Inforadio: Andreas Jankowiak im Gespräch über bERLinPro


    Die Baustelle für bERLinPro fällt auf. Sie ist auch dem Wissenschaftsredakteur des rbb-Inforadio, Thomas Prinzler, nicht entgangen. Und so kam es zu einem kurzweiligen Gespräch, in dem Andreas Jankowiak die Herausforderungen des Projekts erläutert. Hohe Ströme, hohe Emitanzen - viel Physik. Aber auch die Anforderungen an die Gebäudeplanung kamen zur Sprache. Und die Synergie zu BESSY-VSR. Nachzuhören im Inforadio-Gespräch vom 8. November. [...].

  • <p>Charge carriers in polymeric carbon nitrides always take paths perpendicular to the sheets, as Merschjann&rsquo;s group has now shown. Light creates an electron-hole pair. The opposite happens when an electron and hole meet under certain conditions (forming a singlet exciton) and emit light (fluorescence). A graphene lattice is shown in the background. Image: C. Merschjann</p>12.11.2015

    New class of materials for organic electronics:

    Joint project details charge transport in polymeric carbon nitride for first time

    Polymeric carbon nitride is an organic material with interesting optoelectronic properties. As an inexpensive photocatalyst, it can be used to facilitate water splitting using sunlight. Joint research by Helmholtz-Zentrum Berlin, the University of Rostock, Freie Universität Berlin as well as other partners has now investigated for the first time how light creates charge carriers in this class of materials and established details about charge mobility and lifetimes. They discovered surprising characteristics in their investigations that provide prospects for new applications, in conjunction with graphene for example. [...].

  • <p>The picture illustrates a hypothetical highway with the second path winding around the first one. Experimenters at the beamlines could then either use the dense sequence of light pulses from the primary electron path or select individual light pulses from the secondary orbital track.&nbsp; Image: Heike Cords/HZB</p>11.11.2015

    BESSY II electron highway gets second lane

    The particle accelerator team at Helmholtz-Zentrum Berlin (HZB) has demonstrated that BESSY II, the 3rd generation synchrotron radiation source in Berlin, can be operated with not just one, but two simultaneous electron paths. By precisely tuning the magnetic components, physicists can create an additional orbital path. Packets of electrons can travel along it and emit intense light pulses at the experiment stations. This could provide the user community with the option to select light pulses from either path as needed in their experiments. The newly developed orbital mode has already been stably implemented and initial tests at the experiment stations show promising results. HZB is the first to enter this new territory and at the same time has reached another milestone in its pioneering BESSY-VSR project. [...].

  • 10.11.2015

    Uppsala Berlin Joint Laboratory “Our willingness to cooperate is our strength”

    Great political interest for the new Uppsala Berlin Joint Laboratory (UBjL): On the 4th of November, Sweden’s ambassador in Germany, Dr. Lars Danielsson, came personally to the HZB where the UBjL is established for the inauguration of the joint project. [...].

  • 06.11.2015

    50 amateur photographers participate in the Science Photowalk at Helmholtz-Zentrum Berlin

    BESSY II is an amazing location for scientists from all over the world. But today, it will be amazing for more than 50 amateur photographers, too. The Helmholtz-Zentrum Berlin (HZB) invites them to participate on 6. November 2015 in a Science-Photowalk at BESSY II. They will get unique opportunities during a guided tour through the storage ring and you could capture your very personal perspective on science, big instruments and small details. [...].

  • <p>Waiting for remaoval: the old cavities. (HZB, W. Anders)</p>05.11.2015

    Shutdown at BESSY II: An extremely productive break

    From the end of October to the middle of January, no electrons will circulate in the synchrotron ring BESSY II. “We shut down BESSY II at the beginning of the last October week, as planned,” says Dr. Christian Jung, head of the main department Scientific-Technical Infrastructure II. “We plan to carry out extensive maintenance and setup work, so we will be working on BESSY II day and night for close to three months. In mid-January 2016, the radiation source will be available once again to users – more powerful than ever.” [...].

  • 02.11.2015

    Helmholtz-Zentrum Berlin auf der Jahrestagung des Forschungsverbunds Erneuerbare Energie (FVEE)


    Vom 3. Bis 4. November 2015 findet die Jahrestagung des Forschungsverbunds Erneuerbare Energie (FVEE) im Umweltforum Berlin in Berlin statt. Schwerpunktthema ist in diesem Jahr die Wärmewende. Das Helmholtz-Zentrum Berlin ist mit einem Infostand und Vorträgen präsent. [...].

  • <p>A cross section through the tandem cell is shown by this SEM-image. Credit:HZB</p>28.10.2015

    Monolithic perovskite/silicon tandem solar cell achieves record efficiency

    Teams from the Helmholtz-Zentrum Berlin and École Polytechnique Fédérale de Lausanne, Switzerland, have been the first to successfully combine a silicon heterojunction solar cell with a perovskite solar cell monolithically into a tandem device. The hybrid tandem cell showed an efficiency of 18 per cent. That is the highest currently reported value for this type of device architecture. There are even prospects for the efficiency to reach as much as 30 per cent. [...].

  • 22.10.2015

    Science Photowalk at Helmholtz-Zentrum Berlin

    Helmholtz-Zentrum Berlin (HZB) invites you to participate on 6. November 2015 in a Science-Photowalk at BESSY II. If you love to take photographies of unconventional objects, you will get unique opportunities during a guided tour through the storage ring and you could capture your very personal perspective on science, big instruments and small details. There is a limited number of places, participation is for free, the best picture will be awarded. Please apply until 2. November 2015. [...].

  • <p>Prof. Liane Benning im &nbsp;<a href="" class="Extern"> Portrait</a>, photo credit: University of Leeds</p>21.10.2015

    Liane Benning (GFZ) talks about „The Birth and Life Cycle of a Nanoparticle: or how to make crystals from ions”

    20 years Helmholtz Association – a series of lectures shows the variety of the research field

    The Helmholtz Association is turning 20 – and will be celebrating this anniversary with a series of lectures held locally at each of its centres. On 5 November, the HZB in Wannsee will receive a visit from Prof. Liane Benning. She is a geochemist at the German Research Center for Geosciences GFZ and will be speaking about nanoparticles. She will show us why understanding the reactions taking place on the Earth’s surface is important for protecting the Earth. For Liane Benning, synchrotron radiation is also an indispensable tool for deciphering the secrets of our planet. [...].

  • <p>Methan hydrate is found under extreme conditions in the deep sea and becomes "burning ice" in contact with air. &copy; Science Party SO174/GEOMAR Helmholtz-Zentrum f&uuml;r Ozeanforschung Kiel.</p>20.10.2015

    D-Lecture with Metin Tolan: “Burning Ice” - synchrotron radiation reveals how molecules are captured in hydrates

    Most of the carbon on earth is stored as methane-hydrate in deep sea areas (so-called "burning ice”). Prof. Metin Tolan, Technische Universität Dortmund, will show new data from synchrotron experiments, which unveil the process of hydrate formation for the first time, thus addressing a burning topic of energy and climate research. [...].

  • <p>Markus Kubin in front of his poster. Credit: HZB</p>20.10.2015

    Poster award to Markus Kubin

    At the International Conference on X-Ray Absorption Fine Structure Markus Kubin has been selected to receive one out of five poster awards. More than 300 posters have been presented at the poster session. [...].

  • <p>Simone Raoux is a professor at the Department of Physics at HU Berlin and is happy to show students the workings of BESSY II.</p>19.10.2015

    Simone Raoux becomes a Professor at Humboldt-Universität zu Berlin

    Prof. Dr. Simone Raoux has accepted the call to the W3-S professorship “Nanospectroscopy for Design and Optimisation of Energy-Related Materials” in the Department of Physics at Humboldt-Universität zu Berlin. The professorship is associated with heading the institute of the same name at the Helmholtz-Zentrum Berlin für Materialien und Energie. Prof. Raoux accepted the call in September 2015. [...].

  • <p>The SiO<sub>2</sub> nanoparticles (black) have been imprinted directly on the Molybdenum substrate (purple) which corresponds to the back contact of the solar cell. On top of this structured substrate the ultrathin CIGSe layer (red) was grown at HZB, and subsequently all the other layers and contacts needed for the solar cell. Since all layers are extremely thin, even the top layer is showing deformations according to the pattern of the nanoparticles.&nbsp; Credit: G.Yin / HZB</p>15.10.2015

    Scientists demonstrate how to improve ultrathin CIGSe solar cells by nanoparticles

    CIGSe solar cells  are made of a thin chalcopyrite layer consisting of Copper, Indium, Gallium and Selenium and can reach high efficiencies. Since Indium is becoming scarce and expensive, it is interesting to reduce the active CIGSe layer, which however decreases the efficiency quite strongly.  Now, scientists at Helmholtz-Zentrum Berlin have produced high quality ultrathin CIGSe layers and increased their efficiency by an array of tiny nanoparticles between the back contact and the active layer. [...].

  • <p><strong>Happy Birthday, School Lab!</strong> Ulrike Witte and Gabriele Lampert (both HZB staff) cut the birthday cake for the guests and employees.</p>15.10.2015

    Five years of the School Lab in Adlershof

    To get school students interested in science, to show them the points of contact between research and everyday life – this is the mission of the HZB School Lab. Today, it celebrates its fifth anniversary at Adlershof. Since its founding in October 2010, more than 5,500 school students have come to perform experiments at the premises on Magnusstraße in Adlershof. [...].

  • <p>Prof. Martha Lux-Steiner has been awarded by the European Association for Renewable Energy (EUROSOLAR) for her work and involvement in research and education with the German Solar Prize. Credit: Roland Horn / HZB</p>13.10.2015

    German Solar Prize for scientist for Martha Lux-Steiner

    Renowned physicist Prof. Martha Lux-Steiner, a scientist at Helmholtz-Zentrum Berlin and Freie Universität Berlin, has received the German Solar Prize for 2015. The European Association for Renewable Energy (EUROSOLAR) recognised her lifetime of work and involvement in research and education with the award. [...].

  • <p>The perovskite film (black, 200-300 nm) is covered by Spiro.OMeTAD, Graphene with gold contact at one edge, a glass substrate and an amorphous/crystalline silicon solar cell. Credit: F. Lang / HZB</p>02.10.2015

    Graphene as a front contact for silicon-perovskite tandem solar cells

    HZB team develops elegant process for coating fragile perovskite layers with graphene for the first time. Subsequent measurements show that the graphene layer is an ideal front contact in several respects. [...].

  • <p>Typische Unterhaltung &uuml;ber BESSY II im Puppentrick</p>01.10.2015

    Science-Video Wettbewerb: Der vom HZB eingereichte Beitrag aus dem Happy Undulator ist einer der Finalisten.


    Jetzt gilt‘s: bitte teilen, kommentieren und voten. Der von Wissenschaft im Dialog durchgeführte Video-Wettbewerb „Fast Forward Science 2015“ geht in die heiße Phase. 109 Videos sind bis zum Stichtag 31. Juli eingereicht worden, von denen eine Jury nun 17 Beiträge fürs Online-Voting ausgewählt hat, darunter der vom HZB eingereichte Beitrag „BESSY II: What can I do for you?“. Gefragt waren in dem Wettbewerb Wissenschaftsvideos, die zugleich unterhalten, wissenschaftlich fundiert und verständlich sind. [...].

  • <p><strong>Lernen mit Blick auf die Alpen:</strong> 53 Teilnehmende aus aller Welt lernten bei der Quantsol-Sommerschule Grundlagen der Photovoltaik und solaren Brennstofferzeugung. Foto: HZB</p>30.09.2015

    Quantsol Sommerschule 2015 – erfolgreich im 8. Jahr


    Die International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion (Quantsol) fand vom 6. bis 13. September 2015 zum achten Mal in Folge im österreichischen Hirschegg/Kleinwalsertal statt. Über 50 angehende Solarforscherinnen und -forschern aus 19 Ländern besuchten die Veranstaltung. [...].

  • <p>Staunende Gesichter im Kontrollraum des BESSY II. Foto: A. Kubatzki</p>30.09.2015

    Tage der Forschung in Adlershof


    Am 24. und 25. September fanden in Adlershof die diesjährigen Tage der Forschung statt. Schülerinnen und Schüler der gymnasialen Oberstufe aus Berlin und Brandenburg bekamen die Möglichkeit, Forschungseinrichtungen am Wissenschaftsstandort Adlershof zu besichtigen. Das HZB bot vier Schülergruppen einen spannenden Einblick in die Welt der Forschung. [...].

  • <p>2.500 experts on photovoltaics from all over the world met at the 31th EU PVSEC in Hamburg. Credit: Guglielmo de' Micheli</p>29.09.2015

    Helmholtz-Zentrum Berlin successfully at international Photovoltaic Conference in Hamburg

    From 14. to 18. September more than 2.500 experts on photovoltaics from all over the world met at the 31th EU PVSEC in Hamburg to discuss the latest developments and innovations. The Helmholtz-Zentrum Berlin (HZB) was present at the conference with oral and poster presentations and in addition with an booth at the exibition. A joint publication by the Competence Centre for Photovoltaics (PVcomB) and Institute for Silicon Photovoltaics was chosen from 1,300 contributions under the best TOP 20 of the conference. [...].

  • <p>HZB scientists develop new methods to investigate the electronic structure of catalytic molecules. Credit: HZB</p> <p></p>28.09.2015

    Catalysis research strengthened: Helmholtz-Zentrum Berlin participates in newly approved Einstein Center for Catalysis

    The Einstein Foundation will fund the new Einstein Center for Catalysis (EC2) beginning in 2016 in which Technical University Berlin (TU Berlin) and selected non-university institutions in Berlin will be participating. Prof. Emad Aziz, head of the HZB Institute for Methods of Materials Research at Helmholtz-Zentrum Berlin will be taking part in setting up the institution. His team will be contributing particular expertise in analytics of ultrafast processes in catalytic reactions. [...].

  • <p>Good atmosphere after the final presentation. Credit: A. Kubatzki</p> <p></p>28.09.2015

    Summer students: Final presentation at a conference

    On Thursday, 24. September 2015, the summerstudents have presented their projects in Wannsee in a science conference format: Three topics have been selected for oral presentation, the other projects were presented in a poster session, thus all students could demonstrate first results.  [...].

  • <p>Liquid flatjet system, showing the two nozzles from which two impinging single jets form a&nbsp; liquid water sheet with a thickness of 1 - 2 &mu;m. Credit: MBI</p>25.09.2015

    How to Flow Ultrathin Water Layers - A Liquid Flatjet for X-Ray Spectroscopy

    A collaboration between scientists from the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI), the Helmholtz-Zentrum Berlin (HZB) and the Max Planck Institute for Dynamics and Self-Organization (MPIDS) have now demonstrated the successful implementation of a liquid flatjet with a thickness in the μm range, allowing for XAS transmission measurements in the soft-x-ray regime. This paves the way for novel steady-state and time-resolved experiments. [...].

  • <p>Die HZB-Energieforschung konnten Sch&uuml;lerinnen und Sch&uuml;ler heute an der Sch&uuml;leruni der Freien Universit&auml;t kennenlernen. Das HZB Sch&uuml;lerlabor Wannsee hat dort zwei Workshops zu Energiethemen angeboten. Foto: HZB</p>24.09.2015

    Das HZB-Schülerlabor an der Schüleruni der Freien Universität Berlin


    Unter dem Motto „Lernen für eine zukunftsfähige Welt“ öffnet die Freie Universität Berlin ihren grünen Campus für eine Schüleruniversität. Eine Woche lang erforschen Schülerinnen und Schüler der 5. Und 6. Klassen, was sich hinter dem Begriff der nachhaltigen Entwicklung verbirgt. Das Schülerlabor des HZB bietet zum Thema „Nachhaltigkeit und Klimaschutz“ zwei Workshops an. [...].

  • 21.09.2015

    The 6th International Conference on Small-Angle Scattering SAS in the Social Media

    Scientific networking at its best. 400 scientists from around the world met in Berlin from 13th to 18th September 2015. The SAS 2015 Conference is a triennial forum for the discussion of the most recent advances in the field of small angle scattering and assembles scientists from all around the world. We published a SAS2015-storify with the best impressions of the conference posted by the scientists. [...].

  • <p>Proteinkristalle an BESSY II studieren: Dank eines einmaligen Projektes k&ouml;nnen Studierende der FU Berlin regelm&auml;&szlig;ig am Snychrotron experimentieren. Das ist nur einer der sichtbaren Erfolge der Kooperation in der Berliner Strukturbiologie. Foto: Silvia Zerbe/HZB</p>21.09.2015

    Gemeinsames Treffen der Strukturbiologen in Berlin: der 6. Joint-MX-Day am 23. September 2015 am HZB


    Die Hauptstadt hat sich in den letzten Jahren zu einem Hotspot der Strukturbiologie in Deutschland entwickelt. Entscheidend dazu beigetragen hat das hohe Maß an Kooperation zwischen außeruniversitären Forschungseinrichtungen und Universitäten. Aber auch Wissenschaft und Industrie arbeiten in der Strukturbiologie sehr eng zusammen. Am 23. September 2015 findet der 6. Joint-MX-Day statt, bei dem sich Forscher über neue Methoden, Ansätze und Erkenntnisse in der Strukturbiologie austauschen werden. [...].

  • <p>Die Online-Ausgabe der lichtblick finden Sie <a href="/media/media/aktuell/print//lichtblick/139/hzb_lichtblick_september-2015_extern_web.pdf" class="Extern">hier</a>.</p>21.09.2015

    Neuer lichtblick: Neues Exzellenzlabor mit ZEISS, Tipps für das sichere Surfen im Netz, ein Comic über BESSY II ...


    Hätten Sie den Low Alpha Mode lieber mit – oder ohne Photonenpicker? Wollen Sie die Polarisation vertikal oder elliptisch? Und den Kaffee stark oder entkoffeiniert? Kein Problem! Im Café Happy Undulator ist man guten Service und anspruchsvolle Wünsche gewohnt. Mehr dazu gibt es im BESSYII-Comic in der neuen lichtblick. Natürlich darf darin auch nicht fehlen, dass die Küche schon an einem neuen Rezept für den Speicherring arbeitet. Und wer es lieber sachlich will, findet alle Informationen rund um das Zukunftsprojekt BESSY VSR im Interview mit Andreas Jankowiak. [...].

  • <p>Interessante Ergebnisse, gut pr&auml;sentiert: Jannik M&ouml;ser hat f&uuml;r sein Poster einen Preis erhalten. Foto: HZB</p> <p></p>16.09.2015

    Posterpreis für HZB-Nachwuchsforscher Jannik Möser aus dem Institut für Nanospektroskopie


    Für sein Poster über den experimentellen Nachweis von Defekten in Dünnschicht-Silizium-Materialien für die Photovoltaik hat Jannik Möser einen Preis erhalten. Er erhielt diese Auszeichnung auf der Tagung der Fachgruppe magnetische Resonanz der Gesellschaft Deutscher Chemiker (GDCH), die Anfang September in Darmstadt stattfand. [...].

  • <p>price ceremony at the ECM29</p>16.09.2015

    poster prize for Laura Elisa Valle Rios student at the European Crystallographic Meeting (ECM29)

    The poster contribution of Laura Elisa Valle Rios (HZB-Department Crystallography) was awarded the CrystEngComm poster price of the Royal Society of Chemistry at the 29th European Crystallographic Meeting (ECM29) in Rovinj (Croatia). Laura Elisa, a PhD student in the Marie-Curie Initial Training network KESTCELLS and the HZB Graduate School "Materials for Solar Energy Conversion" (MatSEC).  [...].

  • <p>Fotos: HZB / Michael Setzpfandt</p>15.09.2015

    Milch, Wirkstoff-Taxis und andere kolloide Materialsysteme analysieren: SAS 2015 tagt in Berlin


    Vom 13. - 18. September treffen sich über 400 Expertinnen und Experten zur 16. Internationalen Konferenz zur Kleinwinkelstreuung (16. International Conference on Small Angle Scattering, SAS 2015) in Berlin. Mit Kleinwinkelstreuung lassen sich biologische und anorganische Materialsysteme auf Nanometerskala untersuchen und dynamische Prozesse beobachten.

    Verfolgen Sie die Highlights der Konferenz auf Twitter unter dem Hashtag #SAS2015. [...].

  • <p>New efficiency record: This small device is able to convert 14 percent of the incoming solar energy into hydrogen. Credit: M. May</p>15.09.2015

    Hydrogen from sunlight: new efficiency record for artificial photosynthesis

    An international team has now succeeded in considerably increasing the efficiency for direct solar water splitting. They are using a tandem solar cell whose surfaces have been selectively modified. The new record value is 14 % and thus considerably above the previous record of 12.4 % held by the National Renewable Energy Laboratory (NREL) in the USA, broken now for the first time in 17 years. Researchers from the Institute for Solar Fuels at the Helmholtz-Zentrum Berlin, TU Ilmenau, the Fraunhofer Institute for Solar Energy Systems ISE in Freiburg and the California Institute of Technology (Caltech) participated in the collaboration. The results have been published in Nature Communications. [...].

  • <p>Group picture in a beautiful landscape. Photo: Gino G&uuml;nzburger.</p>14.09.2015

    ISUenergy 2015 – the 7th successful year!

    Local energy education & training for a global learning community 

    The International Summer University for Renewable Energy, the ISUenergy 2015, took place already for the seventh time from August to the beginning of September in Falera, Graubünden, with students from all around the world. [...].

  • <p>Spatenstich f&uuml;r die neue Beschleunigerhalle von bERLinPro. Zu sehen sind v.l.n.r: Jens Knobloch, Thomas Frederking, Anke Kaysser-Pyzalla, Andreas Jankowiak, Constanze Tibes (Fotos: Silvia Zerbe/HZB)</p>11.09.2015

    Rohbauarbeiten für Beschleunigerhalle am HZB beginnen: Spatenstich für eine Testanlage eines Linearbeschleuniger mit Energierückgewinnung (ERL)


    Unmittelbar vor dem Beginn der Rohbauarbeiten wurde am 10. September 2015 der Spatenstich für die neue Beschleunigerhalle von bERLinPro gefeiert, in der eine kompakte Testanlage für einen Linearbeschleuniger mit Energierückgewinnung aufgebaut wird. Zirka 200 geladene Gäste verfolgten diesen Meilenschritt auf dem Weg zur Realisierung eines technologisch einzigartigen Projekts. [...].

  • <p>A week long training gave the participants of the summer school a good overview about EPR methods. Credit: HZB</p>09.09.2015

    Berlin Joint EPR lab organises the 7th Summer School of the European Federation of EPR Groups with 120 participants from 26 countries

    100 students and 20 lecturers from all around the world came to Berlin for a week at the end of August to take part in the biggest and most traditional educational event in the field of electron paramagnetic resonance (EPR). The Summer School was organised, with the support of the HZB, by the groups of the Berlin Joint EPR labs (BeJEL) of HZB and Freie Universität Berlin. [...].

  • <p>11 Azubis und vier Studierende haben sich f&uuml;r einen Start ins Berufsleben am HZB entschieden. Heute ging es offiziell los. Foto: Jennifer Bierbaum</p>01.09.2015

    Herzlich Willkommen: Ausbildungsstart am 1. September am HZB


    11 Auszubildende und 4 Studierende starten heute ins Berufsleben. Am offiziellen Ausbildungsbeginn begrüßte der kaufmännische Geschäftsführer des HZB, Thomas Frederking, die Neuankömmlinge auf dem Campus Wannsee im Rahmen einer kleinen Kennlernveranstaltung. [...].

  • <p>The front of the new bERLinPro building designed by the architecture office DGI Bauwerk</p>27.08.2015

    Ground-breaking ceremony for the bERLinPro building on 10th September 2015 at 12:30

    We cordially invite you to the bERLinPro (Berlin Energy Recovery Linac) groundbreaking ceremony on 10th September 2015 at 12:30. The HZB develops in Berlin-Adlershof a test facility for an Energy Recovery Linac. [...].

  • 20.08.2015

    HZB Scientist Frank Siewert wins Giovanni Sostero Award

    Congratulations to Frank Siewert, who just won the 2015 International Giovanni Sostero Award

    Frank Siewert was honored in particular for his contributions on the development of latest metrology for Synchrotron Optics. He has “pushed the limits of X-ray optics metrology to an unprecedented level and gave a collaborative and constructive support to the international community on metrology for X-ray optics” as the awarding committee pointed out. [...].

  • <p>Sara J&auml;ckle has demonstrated the formation of a pn-heterojunction at the interface between an organic contact and n-doped silicon. Photocredit: Bj&ouml;rn Hoffmann</p>17.08.2015

    Charge transport in hybrid silicon solar cells

    An HZB team headed by Prof. Silke Christiansen has made a surprising discovery about hybrid organic/inorganic solar cells. Contrary to expectations, a diode composed of the conductive organic PEDOT:PSS and an n-type silicon absorber material behaves more like a pn junction between two semiconductors than like a metal-semiconductor contact (Schottky diode). Their results have now been published in the Nature journal Scientific Reports and could point the way toward improvements in hybrid solar cells. [...].

  • <p>The magnetic structure of LiFePO<sub>4</sub></p>06.08.2015

    Anomalous magnetic structure and spin dynamics in magnetoelectric LiFePO4

    A team at HZB has recently unraveled intricate details of the magnetic structure and dynamics of the magnetoelectric compound LiFePO4. Such materials currently find use in sensors but there are promising perspectives for magnetoelectrics to be applied in data storage and spintronic devices as well. [...].

  • <p>Manuela G&ouml;belt is evaluating SEM-images to calculate the local degree of networking. Photo: Bj&ouml;rn Hoffmann.</p>31.07.2015

    Transparent, electrically conductive network of encapsulated silver nanowires – a novel electrode for optoelectronics

    A team headed by Prof. Silke Christiansen has developed a transparent electrode with high electrical conductivity for solar cells and other optoelectronic components – that uses minimal amounts of material. It consists of a random network of silver nanowires that is coated with aluminium-doped zinc oxide. The novel electrode requires about 70 times less silver than conventional silver grid electrodes, but possesses comparable electrical conductivity. [...].

  • 29.07.2015

    Helmholtz to invest 46 million EUR in new shared laboratory infrastructure

    Six Helmholtz Centres are founding a shared infrastructure for developing novel energy materials that will also be available to external users.

    The Helmholtz Senate has approved setting up a major infrastructure to synthesise and develop novel systems of materials for energy conversion and storage. Total funding will be 46 million EUR (2016-2020). [...].

  • <p>The new filling pattern consists of a Hybrid (or Camshaft) bunch at 4 mA (Chopper) in the center of the 200 ns wide ion clearing gap followed by the so-called PPRE-bunch of variable transverse excitation at 3 mA and 84 ns later. Together with the usual multibunch filling and the 3 slicing bunches on top of the multibunch train, now 302 out of 400 possible buckets in the storage ring are filled and topped up. Image: HZB</p>28.07.2015

    BESSY II launches New Filling Pattern in User Mode

    Since July 2015 BESSY II has been providing a new bunch filling pattern in Top-Up mode. It will open new opportunities especially for research teams dealing with time-resolved x-ray experiments. It is of significant importance for us and the community anticipating BESSY VSR. [...].

  • <p>The hedgehog-configuration of the spins and the Fermi-Level is shown. Illustration Thomas Splettst&ouml;&szlig;er/HZB</p>27.07.2015

    Spins in Graphene with a Hedgehog Texture

    HZB researchers demonstrate a fundamental property of the electron spin in graphene

    HZB researchers have been experimenting for quite some time with graphene, a material famous for its highly mobile electrons. They intend to impose an additional property on the graphene. This property is a coupling between the direction of motion of these electrons and their angular momentum, in other words: their spin. This is, however, an exclusive property of heavy elements, for example gold. Graphene consists of carbon and is too light to this end. HZB researchers, however, are experts in depositing gold atoms underneath a graphene layer in a controlled way. In this way, one can indeed create peculiar spin textures which have become known as the "Rashba effect". Nevertheless, only spin textures within the graphene plane had been possible. Now Dr. Andrei Varykhalov and co-workers succeeded to turn the spin also out of the plane. [...].

  • <p>Dr. Tristan Petit will broaden his research on nanocarbon materials with the Freigeist Fellowship. Credit: HZB</p>23.07.2015

    Freigeist Fellowship for Tristan Petit

    For his project on nanodiamond materials and nanocarbon, Dr. Tristan Petit has been awarded a Freigeist Fellowship from the VolkswagenStiftung. The grant covers a five-year period and will enable him to establish his own research team. The VolkswagenStiftung is funding with these prestigious fellowships outstanding postdocs planning original research that transcends the bounds of their own field.

  • <p>Prof. Peter-Andr&eacute; Alt (right), President of Freie Universit&auml;t Berlin, conferring the appointment on Prof. Emad Aziz. Image: Freie Universit&auml;t Berlin</p>13.07.2015

    Emad Aziz promoted to full professor

    Prof. Emad Aziz has been promoted to full Professor (German W3) at the Freie Universität Berlin effective July 1, 2015. He held previously a junior professorship in the Department of Physics. Aziz heads the HZB Institute for Methods of Material Development and the JULiq Joint Lab operated concomitantly by the HZB and Freie Universität Berlin. [...].

  • <p>X-ray spectroscopies have shown a higher chlorine concentration near the perovskite/TiO<sub>2</sub> interface than throughout the rest of the perovskite film. Credit: D. Starr/HZB</p>10.07.2015

    Depletion and enrichment of chlorine in perovskites observed

    X-ray spectroscopy at BESSY II reveals inhomogenous distribution of chlorine in a special class of perovskite materials. The discovery could help to enhance efficiencies of perovskite thin film solar cells by controlled processing to optimize the chlorine distribution. [...].

  • <p>Prof. Dr. Gerd Schneider becomes a full professur for x-ray microscopy at the Humboldt University Berlin and is the head of the HZB group "Microscopy". Credit: WISTA MANAGEMENT GmbH</p>08.07.2015

    Gerd Schneider receives a professorship for "X-ray microscopy" at Humboldt-Universität zu Berlin

    On 29 April 2015, Gerd Schneider (HZB) accepted the call to a W2-S “X-ray microscopy” professorship at the Department of Physics of Humboldt-Universität zu Berlin. The professorship is associated with heading the workgroup “X-ray microscopy” at the Helmholtz-Zentrum Berlin für Materialien und Energie. With his group, the internationally recognised expert is developing new methods and applications for X-ray microscopy, which delivers crucial information for many scientific disciplines – from material and energy research to the life sciences.  [...].

  • <p>HZB Group at the ICT/ECT2015. From left to right: Dr. Klaus Habicht (Head of the Department for Methods for Characterization of Transport Phenomena in Energy Materials), Dr. Tommy Hofmann, Dr. Katharina Fritsch, Dr. Britta Willenberg, Dr. Katrin Meier-Kirchner</p>07.07.2015

    HZB presents research on thermoelectrics

    The annual "International Conference on Thermoelectrics (ICT)” and the "European Conference on Thermoelectrics (ECT)” took place together from 29 June to 02 July 2015 in Dresden, Germany. For the first time, HZB participated in this international multidisciplinary meeting. The HZB Department "Methods for Characterization of Transport Phenomena in Energy Materials" headed by Dr. Klaus Habicht presented their research in two talks and one poster. [...].

  • <p>Mapping of the captured magnetisation domains (right, red-blue patterns) in a sample 20 nanometres thick that had been wound in two layers into a tube. The tube has a diameter of 5 microns and a height of 50 microns. Credit: F. Kronast /HZB</p>07.07.2015

    New technique enables magnetic patterns to be mapped in 3D

    An international collaboration has succeeded in using synchrotron light to detect and record the complex 3D magnetisation in wound magnetic layers. This technique could be important in the development of devices that are highly sensitive to magnetic fields, such as in medical diagnostics for example. Their results are published now in Nature Communications. [...].

  • <p>These samples with precise proportions of nickel and copper were produced via an improved preparation procedure. Photo: M. Tovar/HZB</p>06.07.2015

    Crystal structure and magnetism – new insight into the fundamentals of solid state physics

    HZB team decodes relationship between magnetic interactions and the distortions in crystal structure within a geometrically “frustrated” spinel system.

    A team at HZB has carried out the first detailed study of how magnetic and geometric ordering mutually influence one another in crystalline samples of spinel. To achieve this, the group synthesised a series of mixed crystals with the chemical formula Ni1-xCuxCr2O4 in which the element nickel was successively replaced by copper. They discovered through neutron scattering experiments at BER II not only how the crystal structure changes, but also uncovered new magnetic phases. The results were published in Physical Review B. [...].

  • <p>The HZB has officially been a family-friendly employer since 2011. It created many structures that contribute towards better long-term reconciliation of career and family.</p>03.07.2015

    HZB has its career and family certificate renewed: New agreed targets for the next three years

    On 29 June 2015, Iris Gleicke, Parliamentary State Secretary of the Federal Ministry of Economics and Energy, awarded the HZB the “berufundfamilie” certificate (career and family). So certified, the research centre has officially been a family-friendly employer since 2011. The certificate is highly respected among chambers of commerce, associations and in politics, since it attests to the fact that the certified company has truly organised its working conditions to be more family friendly. In the first three years, the HZB created many structures that contribute towards better long-term reconciliation of career and family. [...].

  • <p>Alexander F&ouml;hlisch is head of the HZB Institute Methods and Instrumentation for Synchrotron Radiation Research and holds a professorship at University Potsdam. Credit: HZB</p>03.07.2015

    From Excited Atoms to Functionality – ERC Advanced Grant Awarded to Alexander Föhlisch

    Under the EU Horizon 2020 Programme for Research and Innovation, Alexander Föhlisch has been awarded an ERC Advanced Grant. The physicists is holding a joint appointment at the Institute for Physics and Astronomy of the University of Potsdam and at the Helmholtz-Zentrum Berlin für Materialien und Energie. He is to receive a total of 2.5 million Euros over a five-year period to support his work on highly selective methods of detection using synchrotron light and X-ray lasers. [...].

  • <p>Sunlight activates the catalytic behavior of diamond materials, thus helping to convert carbon dioxide into fine chemicals and fuels. Credit: T.Petit/H.Cords/HZB</p>02.07.2015

    Green solutions with diamond materials:

    Horizon 2020 invests 3.9 million Euro in research project to convert CO2 into fuels using sunlight and diamond materials

    A great new idea is now being investigated by scientists of Germany, France, England, and Sweden, among them HZB’s Prof. Emad Aziz. They propose exploring diamond materials for photocatalytic conversion of carbon dioxide into fine chemicals and fuels using visible light (DIACAT). [...].

  • <p>Promovierende der Graduiertenschule MatSEC</p>01.07.2015

    Forschungskolloquium der Graduiertenschule MatSEC


    Am 24. Juni trafen sich die Mitglieder der Graduiertenschule MatSEC zum halbjährlichen Forschungskolloquium auf dem Lise-Meitner-Campus. MatSEC wurde im Frühjahr 2013 unter dem Dach der Dahlem Research School der Freien Universität Berlin gegründet. Die Graduiertenschule bietet ein strukturiertes dreijähriges Promotionsprogramm und beschäftigt sich mit Kesterit-Verbindungshalbleiter. [...].

  • <p>Hexagonal single crystal of SrCo<sub>6</sub>O<sub>11</sub>, with a sample diameter of approximately 0,2 millimetres.</p>01.07.2015

    Emergence of a “devil’s staircase” in a spin-valve system

    A Japanese-German team observes at BESSY II how spins form unusual magnetic structures in a complex cobalt oxide single crystal. Such a material offers new perspectives for spintronic applications. [...].

  • <p><strong>Watching the sky:</strong> The kindergarten Kids built spectroscopes and used them to study the different kinds of light.</p>24.06.2015

    40 kindergarten kids jointed the School Lab on Little Scientists’ Day

    Young guests visiting the School Lab of the Helmholtz-Zentrum Berlin is nothing unusual. But on the 23rd of June 2015, even the tiniest were allowed to get into the role of researcher and conduct their own experiments. The School Lab took part in the Germany-wide campaign “Tag der Kleinen Forscher” (Little Scientists’ Day), and invited 40 children of ages five to seven to the Adlershof campus. Here, they built spectroscopes and used them to study the different kinds of light. After a good hour of intensive experimenting, each child proudly held his or her “researcher’s diploma” in hand. [...].

  • <p>The illustration shows how maleimide compounds bind to the graphene surface. The graphene monolayer lies on a thin film of silicon nitride (red) that in turn is on a quartz microbalance (blue) and can be subjected to a potential via a gold contact (yellow).<br /><br />Illustration: Marc Gluba/HZB</p>24.06.2015

    Towards graphene biosensors

    For the first time, a team of scientists has succeeded in precisely measuring and controlling the thickness of an organic compound that has been bound to a graphene layer. This might enable graphene to be used as a sensitive detector for biological molecules in the future. [...].

  • <p>Illustration of the complex biostructure of dentin: the dental tubuli (yellow hollow cylinders, diameters appr. 1 micrometer) are surrounded by layers of mineralized collagen fibers (brown rods). The tiny mineral nanoparticles are embedded in the mesh of collagen fibers and not visible here. Credit: JB Forien @Charit&eacute;.</p>24.06.2015

    Strong teeth: Nanostructures under stress make teeth crack resistant

    Human teeth have to serve for a lifetime, despite being subjected to huge forces. But the high failure resistance of dentin in teeth is not fully understood. An interdisciplinary team led by scientists of Charité – Universitätsmedizin Berlin has now analyzed the complex structure of dentin. At the synchrotron sources BESSY II at HZB, Berlin, Germany, and the European Synchrotron Radiation Facility ESRF, Grenoble, France, they could reveal that the mineral particles are precompressed. The internal stress works against crack propagation and increases resistance of the biostructure. [...].

  • 16.06.2015

    50 PhD students from the HZB attended the PhD Retreat in Liebenwalde

    From the 3rd to the 5th of June, 2015, this year’s PhD Retreat took place in Liebenwalde, with more than fifty PhD students from the HZB taking part. Among other topics, the programme included seminars on scientific writing, time management and learning intercultural competence. The practical workshop received great interest. The participants also found many opportunities in the venue’s idyllic setting to network with those from other departments and locations. [...].

  • <p>From the 5th to the 8th of June, 1,200 sports enthusiasts from 36 European research centres came to Mol, Belgium, for the Atomiade. The HZB team&rsquo;s trip was an outstanding success.</p>16.06.2015

    37 medals for HZB athletes at the Atomiade

    3rd place overall in the Games
    From the 5th to the 8th of June, 1,200 sports enthusiasts from 36 European research centres came to Mol, Belgium, for the Atomiade. The HZB team’s trip was an outstanding success: In the team competitions, the 34 participants from HZB earned 37 medals (8 gold, 12 silver and 17 bronze) and 2 cups (tennis and badminton). In the overall ranking, the HZB team took third place. [...].

  • <p>Exciting tricks with liquid nitrogen; Photo: Ingo Kniest</p>15.06.2015

    1,300 visitors at the Long Night of Sciences in Wannsee

    Despite muggy-warm temperatures and storms on Saturday, thousands of eager people once again rolled in to catch up on the science in the region. 1,300 visitors to the Helmholtz-Zentrum Berlin took part in guided tours through laboratories and the colourful hands-on programme. We have captured the best moments with Storify. [...].

  • 15.06.2015

    BESSY II - What can I do for you?

    To this very special question the current movie published by HZB gives an answer. We didn't produce a classic image film and show the xth series of images from a storage ring, but chose a different approach. The result is a funny puppet animation, in which our message is very clear but subtle: The Berlin Electron Storage Ring for Synchrotron Radiation has great tools and experimental facilities and whatever users want, at BESSY II they get it.


  • <p><strong>Frostige Wissenschaften:</strong> Experimente mit fl&uuml;ssigem Stickstoff</p>11.06.2015

    Eine lange Nacht geballtes Wissen tanken


    Führungen an der Neutronenquelle, Experimente zur Energie für Groß und Klein, Licht-Show und vieles mehr

    Wissbegierige wissen es längt: Am 13. Juni findet von 17 bis 24 Uhr wieder die Lange Nacht der Wissenschaften in Berlin und Potsdam statt. Das HZB in Wannsee ist wieder mit von der Partie und bietet viele spannende Experimente zum Staunen und Mitmachen an. Ein Höhepunkt in diesem Jahr: Zum ersten Mal kann der neue Hochfeldmagnet bewundert werden, der mit 26 Tesla der stärkste Magnet für Neutronenstreuung weltweit ist. Doch diese Nacht soll nicht nur ein bisschen klüger, sondern auch viel Spaß machen. Lassen Sie sich begeistern von der spektakulären Licht-und Lasershow des Entertainers Dr. Andreas Korn-Müller, der eine der großen Lebensfragen beantworten will: Kann man ein echtes Laserschwert bauen? Bitte bringen Sie zum Einlass Ihren Personalausweis oder Reisepass mit. [...].

  • <p>Die Berliner Bildhauerin Anna Franziska Schwarzbach hat das erste Denkmal in Deutschland f&uuml;r eine Wissenschaftlerin errichtet.</p>11.06.2015

    Öffentliche Einweihung des Lise-Meitner-Denkmal am 13. Juni zur Langen Nacht der Wissenschaften


    Seit ein paar Tagen verfügt der Innenhof des Hörsaalgebäudes am Campus Wannsee über eine wahre Attraktion - das neu errichtete Lise-Meitner-Denkmal. Es wird bei der Langen Nacht der Wissenschaften am 13. Juni 2015 um 17.30 Uhr feierlich eröffnet. Die Bildhauerin Anna Franziska Schwarzbach, die das Denkmal realisiert hat, steht für Gespräche zur Verfügung.

    Mit Denkmal ehren wir die Namensgeberin unseres Campus in Wannsee nun auch physisch und öffentlich sichtbar. Das Denkmal ist eine Kopie der Statue, die die Künstlerin im Lichthof der Humboldt-Universität errichtet hat. Sie gewann den dort ausgeschriebenen mehrstufigen Wettbewerb, den das HZB ebenfalls unterstützt hatte. [...].

  • 03.06.2015

    HZB-Zeitung "lichtblick" Juni 2015 erschienen


    Drei Monate liegen hinter uns, in denen viel passiert ist. Von uns lange erwartet wurde die Inbetriebnahme des Hochfeldmagneten für die Neutronenforschung im Mai 2015. Aber auch bei den anderen HZB-Zukunftsprojekten ging es rasant voran: die Bauarbeiten für eine neue Beschleunigerhalle für bERLinPro wurden begonnen, am Analyselabor EMIL werden die Messtationen gerade installiert und das Team der Proteinkristallographie eröffnet demnächst einen hochautomatisierten Messplatz für unsere Gastforscher. Das sind nur einige Themen, über die wir in der neu erschienenen Zeitung berichten. [...].

  • <p>To obtain the 3D structure of the battery electrode on a micormeter scale, snchrotron tomography at BESSY II was used. Credit: L. Zielke/S. Thiele</p>02.06.2015

    Realistic computer model of battery electrodes

    A research team has developed a new approach for more realistic computer models of battery electrodes. They combined images from synchrotron tomography that capture three-dimensional structure at micron resolution with those from an electron microscope that can even resolve nanometre-scale features over a small section. They were able to transfer these nano-features to areas beyond the section using a mathematical model. Properties and processes within battery electrodes can now be simulated highly realistically using this method. [...].

  • <p>At the MRS Spring Meeting in San Francisco, Kai Neldner was awarded for his poster contribution.</p>29.05.2015

    Poster award for MatSEC PhD student at the MRS Spring Meeting

    The poster contribution of Kai Neldner (HZB-Department Crystallography) was awarded at the Symposium "Thin-Film Compound Semiconductors" at the MRS Spring Meeting in San Francisco. Kai Neldner, a PhD student in the HZB Graduate School "Materials for Solar Energy Conversion" (MatSEC) has presented results on structural properties of Kesterites (Cu2ZnSnS4 - CZTS) in relation to its stoichiometry deviations. [...].

  • 27.05.2015

    Joint Lab BeJEL receives 1.4 million EUR grant

    The Berlin Joint EPR Laboratory (BeJEL) operated by HZB and Freie Universität Berlin has pulled in six of 27 subprojects within a DFG priority program to address “New Frontiers in Sensitivity for EPR Spectroscopy – from Biological Cells to Nano Materials”. [...].

  • <p>Ah Reum Jeong has completed her PhD in physics at Ewha Womans University in Seoul, Korea. She now works as a postdoc in the Hybrid Material Systems &amp; Nano-Analytics team of Dr. Marin Rusu.</p>27.05.2015

    Poster Award for HZB-Postdoc at EMRS Spring Meeting

    During the spring meeting 2015 of the European Materials Research Society the Poster contribution of  Dr. Ah Reum Jeong (HZB-Institute for Heterogeneous Material Systems) was selected for an award.  The young scientist has presented results on electronic and structural properties in relation to chemical composition of molybdenum oxide layers, which are widely applied in photovoltaic as well as optoelectronic devices. [...].

  • <p>ANSTO is delivering scientific services and products to government, industry, academia and other research organisations.&nbsp;</p>22.05.2015

    HZB and ANSTO signed MoU

    In May HZB and the  Australian Nuclear Science and Technology Organisation (ANSTO) have signed a high-level scientific cooperation agreement. The objective is to establish a framework and terms of cooperation in the field of neutron scattering science, and define the mechanisms for collaboration on the basis of mutual benefit, equality and reciprocity. [...].

  • <p>A thin magnetic FeRh film is grown onto a ferroelastic BTO substrate with two different crystal domains a and c. At 0 Volt ferromagnetic domains (red-blue pattern) are observed above BTO a-domains, whereas above c-domains the net magnetization is zero. At 50 Volt all BTO domains are converted into c-domains, which switches off ferromagnetic domains in FeRh. Credit: HZB</p>18.05.2015

    New options for spintronic devices: Switching between 1 and 0 with low voltage

    Scientists from Paris and Helmholtz-Zentrum Berlin have been able to switch ferromagnetic domains on and off with low voltage in a structure made of two different ferroic materials. The switching works slightly above room temperature. Their results, which are published online in  Scientific Reports, might inspire future applications in low-power spintronics, for instance for fast and efficient data storage. [...].

  • <p>A <a href="" class="Extern">short filmclip</a> demonstrates the production of the photocathode with ILGAR method.</p>13.05.2015

    Artificial photosynthesis: New, stable photocathode with great potential

    A team at the HZB Institute for Solar Fuels has developed a new composite photocathode for generating hydrogen with high quantum efficiency using sunlight. This enables solar energy to be stored chemically. The photocathode consists of a thin film of chalcopyrite produced by HZB/PVcomB coated with a newly developed thin film of photoresistant titanium dioxide containing platinum nanoparticles. This layer does not only protect the chalcopyrite thin film from corrosion, it additionally acts as a catalyst to speed-up the formation of hydrogen as well as being a novel photodiode itself that even shows photoelectric current density and voltage comparable to those of a chalcopyrite-based thin film solar cell. [...].

  • <p>At the HZB Institute for Solar Fuels, also nanostructures in metal oxides are explored as efficient catalyst materials for artificial photosynthesis. Credit: HZB</p>12.05.2015

    Success rate 100 percent: HZB teams get third party funding for Solar Fuel projects

    Converting solar energy and storing it in form of solar fuels, is one of the great scientific and technological challenges today to enable the transition into a more sustainable future powered by renewable energies. Scientists at the HZB institute for Solar Fuels are exploring new semiconductor materials in order to develop compact, robust and economic solutions for “artificial photosynthesis”. They have submitted four research projects in collaboration with partners from universities for funding by the German Research Association (Deutsche Forschungsgemeinschaft DFG) in the Priority Programme „Fuels Produced Regeneratively Through Light-Driven Water Splitting” (SPP 1613). All four projects have now been approved for funding. [...].

  • <p>&bdquo;Neuro-anatomy 01&ldquo; von artwork by Aceofhearts1968<strong> <br /></strong></p>08.05.2015

    Dienstag 14:00, Vortrag bei BESSY II: Gliazellen - Der Kitt denkt mit


    Wissenschaft, verständlich erklärt: Hirnforscher Helmut Kettenmann (MDC) gibt Einblick in neue Erkenntnisse über das Gehirn

    Die Helmholtz-Gemeinschaft wird 20 Jahre alt – und feiert dieses Jubiläum mit einer Vortragsreihe in den Zentren vor Ort. Die Eröffnungsveranstaltung findet am 19. Mai um 14 Uhr am Helmholtz-Zentrum Berlin am Standort Adlershof statt. Nach einem kurzen Überblick über die Entwicklung der Helmholtz-Gemeinschaft spricht Prof. Helmut Kettenmann vom Max-Delbrück-Zentrum. Der international angesehene Neurobiologe erforscht Gliazellen, die etwa die Hälfte der Zellen im menschlichen Gehirn ausmachen. Seit langem ist bekannt, dass sie den Nervenzellen Halt geben. Doch nun sind sich Forscher sicher, dass die Gliazellen noch viel mehr können. Der Neurobiologe Helmut Kettenmann berichtet in einem allgemeinverständlichen Vortrag über erstaunliche Entdeckungen in der Gehirnforschung. [...].

  • <p>Ready for use: after 8 years of developement and construction the High Field Magnet at HZB attracts the first users.</p>07.05.2015

    Commissioning party of the High Field Magnet at Helmholtz-Zentrum Berlin

    After about eight years of building and development, we are finally there: At the Helmholtz-Zentrum Berlin, the world’s strongest magnet for neutron experiments is now available to scientists from across the world. The High Field Magnet will be officially put into the service of science at an inauguration party on 7 May 2015. Many research and political representatives and many cooperation and development partners are expected to attend the celebratory commissioning in Berlin-Wannsee. [...].

  • <p>Illustration of the working principle of inkjet printing. Credit: HZB</p>06.05.2015

    Inkjet printing process for Kesterite solar cells

    A research team at HZB has developed an inkjet printing technology to produce kesterite thin film absorbers (CZTSSe). Based on the inkjet-printed absorbers, solar cells with total area conversion efficiency of up to 6.4 % have been achieved. Although this is lower than the efficiency records for this material class, the inkjet printing minimizes waste and has huge advantages for industrial production. [...].

  • <p>PVcomB conducts research and technological improvement on CIGS solar cells, in close cooperation with industrial partners. Credit: A. Kubatzki/HZB</p>04.05.2015

    New opportunities for CIGS solar cells

    Dynamic CIGS solar cell technology workshop gives rise to optimism: experts predict higher efficiencies and lean production technologies

    More than 90 participants from industry and academia from Europe, Asia and USA exchanged latest results in the field of CIGS solar cells, during the “IW-CIGSTech 6” organised by PVcomB at HZB in Berlin-Adlershof from 29. to 30. April.  They reported new, exciting results, ranging from record module efficiencies and significant module manufacturing simplification to solid scientific understanding of the underlying atomic-scale physics and chemistry. [...].

  • <p>Sketch of&nbsp; the &ldquo;MHz-pulse selector&rdquo; which moves frictionless in a vacuum at triple sound velocity perpendicular to the beam. credit: K. Holldack/HZB</p>04.05.2015

    Wheel with triple sound velocity for pulse selection at BESSY II

    In order to pick out only one pulse per turn out of the 400 possible x-ray flashes at BESSY II, a joint team of physicists and engineers from Forschungszentrum Jülich, MPI of Microstructure Physics and HZB have developed an extremely fast rotating “MHz-pulse selector”, which is now at the core of the Uppsala Berlin joint Lab to extract the hybrid bunch within the 200 nanosecond ion clearing gap of BESSY II. The device consists of a wheel made of a special Aluminum alloy which has tiny slits of 70 micrometer width at its outer rim. They move frictionless in a vacuum at triple sound velocity perpendicular to the beam. Users can now decide to operate their experiment in a single bunch mode even during normal multibunch operation of BESSY II. [...].

  • <p>Ultra-high vacuum system in the Energy Materials In-Situ Lab (EMIL) that will combine industry-relevant deposition tools with a suite of complementary advanced characterization methods. Credit: R.G. Wilks.</p>29.04.2015

    EU funding strengthens solar cell research at HZB

    Marcus Bär and his team are participating in two international projects being funded under the EU Horizon 2020 research programme. Both research projects are concerned with development and optimisation of high-efficiency thin-film solar cells based on chalcopyrites (“Sharc 25") and kesterites (“SWInG”). These two projects will together bring in about 900,000 EUR of additional research funding for solar cell research. [...].

  • <p><strong>Exchange, good supervision and fair working conditions</strong>: The HZB has long had PhD guidelines in place to offer PhD students excellent opportunities for development.</p>28.04.2015

    New Guidelines for the completion of PhD projects within the Helmholtz Association

    The Helmholtz Centres and the President have agreed on common PhD guidelines. These guidelines define minimum standards for the creation of optimal conditions for PhD students to operate in and contribute towards a common understanding of quality. The Helmholtz Association hereby acknowledges the indispensability of young researchers for the research efforts of the Association. [...].

  • <p>Die M&auml;dchen untersuchen die selber gez&uuml;chteten Kristalle am Mikroskop.</p>23.04.2015

    Raus aus der Schule, rein ins Labor: 90 Schülerinnen beim Girls'Day am Helmholtz-Zentrum Berlin


    90 Mädchen kamen dieses Jahr zum Girls’ Day in das HZB nach Wannsee und Adlershof. In Laboren und Werkstätten erlebten die Teilnehmerinnen, wie spannend die Arbeit in einem Forschungszentrum ist, und lernten Frauen kennen, die in naturwissenschaftlichen-technischen Berufen arbeiten. Angeboten wurden 16 verschiedene Workshops, von denen die Mädchen zwei auswählten. Sie konnten unter anderem Kristalle züchten, Strom aus Zitronen erzeugen oder ein Schmuckstück vergolden. [...].

  • <p>A view of what had been the practically empty segment at EMIL in the experimental hall; the beam tubes for EMIL are already being marked out on the brand-new flooring. Photo: Ingo M&uuml;ller/HZB<strong><br /></strong></p>21.04.2015

    BESSY II is ready for user service

    BESSY II will be ready for user service once again on April 21 2015. The storage ring was shut down as scheduled from February 9th until the end of March for refurbishment and modernization. The accelerator is operational once again, and has been running since the beginning of April, beginning with beam scrubbing to increase the lifetime of the electrons in the storage ring and to improve operation. At the same time teams have been working on the calibration and commissioning of their instruments.


  • <p>One of the new solid state transmitters: the power supplies are located in the left rack (black), the RF section is located behind the grey doors in the middle and in the right rack the control units can be seen.Credit: HZB</p>20.04.2015

    BESSY II changes over to solid state RF amplifiers

    BESSY II storage ring has four cavity resonators that are excited with high-power oscillating electromagnetic fields to compensate for the energy lost by the electron beam. Four Klystrons, as they are called (large high-power linear RF vacuum tubes), have provided extremely pure 500-MHz RF power for exciting these cavity resonators up to now. But there are no replacement klystrons available on the market. Wolfgang Anders and his team at the HZB’s Institute SRF – Science and Technology have therefore used the shutdown to replace two of the klystrons with modern solid-state RF amplifiers. The other klystrons are to be replaced until the end of the year. [...].

  • <p>Symmetrien; Bildrecht: K.Berthold</p>16.04.2015

    Eröffnung der Ausstellung "Das Bild entsteht im Kopf" am 20. April um 17 Uhr bei BESSY


    Ab dem 20. April 2015 zeigt K. Berthold ihre Arbeiten im BESSY II-Gebäude. Sie ist Meisterschülerin der Universität der Künste Berlin und seit über 20 Jahren als Bildhauerin und Bildgestalterin tätig. In der Ausstellung zeigt die Künstlern über 40 Bilder, die als Collagen aus Zeichnungen, Fotografien und Makroaufnahmen entstanden sind. Wir laden Sie herzlich zur Eröffnung ein. [...].

  • <p>Logo der Teilausstellung "Research &amp; Technology"</p>13.04.2015

    HZB auf der Hannover Messe


    Die Hannover Messe, die weltweit größte Industriemesse, wurde heute eröffnet. Das HZB ist als Aussteller auf dem Themenstand »Energy Research« in der Halle 2 Stand A.32 vertreten. Das HZB präsentiert Themen aus dem Bereich der Energieforschung mit den drei Schwerpunkten: Solare Brennstoffe, die Erforschung von neuen Energiematerialien mithilfe von Großgeräten und das PVcomB.


  • <p>An ultrashort laser pulse activates iron pentacarbonyl as a catalyst. Scientists could observe the subsequent ultrafast processes experimentally by mapping the outer orbitals with an x-ray free electron laser and interpret the obtained energy maps using quantum chemical calculations.<br />Illustration: SciStyle Thomas Splettst&ouml;&szlig;er</p>02.04.2015

    Femto-snapshots of reaction kinetics

    Bonding behaviour of iron pentacarbonyl experimentally decoded. Application as a catalyst for storing solar energy.

    Following six years’ work, an international team comprising eleven research institutions has been successful in observing precisely how light affects the outer electrons of a metallic compound and activates this compound as a catalyst. Their results are published in Nature. [...].

  • 01.04.2015

    Antique Osiris figurines from the Egyptian Museum of Florence examined with neutrons

    An research team from the “Nello Carrara” Institute of Applied Physics, Italy, examined three antique bronze figurines non-invasively with neutrons at the Helmholtz-Zentrum Berlin für Materialien und Energie. The statuettes from the Egyptian Museum of Florence embody Osiris, the Egyptian god of the afterlife, the underworld and the dead. Until now, little had been known about what alloy they consist of or how they were produced. Using several analytical methods, the researchers have now shown that the production method and the materials used were astonishingly similar for all three figurines, even though they were crafted in different regions of ancient Egypt. [...].

  • 31.03.2015

    HZB still a certified family-friendly employer

    The Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) offers a family-friendly environment for its employees. The charitable Hertie Foundation has confirmed this once again, and has awarded the research centre the “career and family” certificate for another three years. The HZB management decided to undergo this external audit in 2011 and has agreed on new targets to increase the family friendliness even further. This certificate awarded by the experts confirms that HZB now ensures better long-term reconciliation of family and career. [...].

  • <p>Solar Solutions, hand made by the students. And they all work. Credit: HZB</p>30.03.2015

    Call for Applications open: International Summer University on Energy, Falera/Switzerland

    Excellent Master, Diploma, and PhD Students from all over the world from different disciplines are invited to participate in the international summer university ISUenergy2015. The ISUenergy2015 will take place from Aug. 23rd - Sept. 4th 2015 in Falera/Switzerland. [...].

  • <p>Leading scientists presented the research programme for the two new graduate schools, HZB is organising together with HUB and UP. credit: Jennifer Bierbaum/HZB</p> <p></p>30.03.2015

    New Opportunities for students in energy research:

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

  • <p>Learning in green surroundings: In 2014 the summer students came from all over the world to meet solar energy experts.</p>25.03.2015

    Registration now open! Summer School Quantsol

    The International Summer School Quantsol will inform on basics in photovoltaics and solar energy conversion.

    For the eighth time already young solar energy researchers are invited to attend the International Summer School on Photovoltaics and New Concepts of Quantum Solar Energy Conversion (Quantsol). The school will be held from September 6th to 13th, 2015 in Hirschegg, Kleinwalsertal, Austria. The school is organized by the Helmholtz-Zentrum Berlin together with the Technical University of Ilmenau. Application can be submitted through the school’s homepage until May 31st, 2015. [...].

  • <p>Susan Schorr is Head of the Department of Crystallography.</p>23.03.2015

    Susan Schorr named DGK Chair

    Prof. Dr. Susan Schorr was elected Chair at the German Crystallographic Society’s (DGK) recent annual conference. The conference took place from March 16-19, 2015, in Göttingen, Germany. Prior to her current appointment, Susan Schorr was head of the DGK’s National Committee. [...].

  • 19.03.2015

    TV-Tipp: Das HZB-Schülerlabor beim Jugendmagazin Yolo - Samstag, 21.3. um 9.15 Uhr auf RTL


    Wer an diesem Samstag schon früh auf den Beinen ist, dem sei das Jugendmagazin Yolo empfohlen. Der TV-Sender RTL strahlt von 9.15 bis 9.45 eine Serie aus, in der es um starke Kräfte und um Superhelden geht.  Gedreht wurde unter anderem im HZB-Schülerlabor. Dort weiß man einiges zu den Superkräften von Magnenten zu sagen. Die Folge kann später auch in der Mediathek des Senders angeschaut werden. [...].

  • <p>Auf frischer Tat ertappt: Stefanie Kodalle und Jennifer Bierbaum knacken die 26 Tesla beim Hochfeldmagneten und fahren den Sieg beim Selfie-Wettbewerb ein.</p>16.03.2015

    Sieger beim ScienceSelfie Wettbwerb: Die HZB-Panzerknacker Stefanie Kodalle und Jennifer Bierbaum knacken die 26 Tesla


    Mit finsterer Miene machen sich die HZB-Kolleginnen Jennifer Bierbaum und Stefanie Kodalle ans Werk: Die beiden Panzenknackerinnen wollen die 26 Tesla beim Hochfeldmagneten des HZB knacken. Glücklicherweise schießen sie im richtigen Augenblick ein Selfie mit dem Smartphone von dem wohl größten Moment in ihrer Verbrecherlaufbahn. Mit diesem Bild haben die beiden Kolleginnen aus der Abteilung Kommunikation auch eine ganz andere Karriere eingeschlagen: Sie gewannen beim ScienceSelfie Wettbewerb zum Pi-Tag, den die Helmholtz-Gemeinschaft ausgerufen hat. [...].

  • <p>3D-Modelle der Beschleunigerhalle f&uuml;r bERLinPro</p>13.03.2015

    Baubeginn für Beschleunigerhalle bERLinPro am Helmholtz-Zentrum Berlin


    Am HZB- Standort Adlershof entsteht ein neuer Linearbeschleuniger mit Energierückgewinnung
    Nach komplexen Planungen und umfangreichen Vorarbeiten ist es nun endlich soweit. Die Bauarbeiten für die neue Beschleunigeranlage bERLinPro am Standort Adlershof haben begonnen. Auf dem Gelände des HZB mit direkter Grenze ans Ernst-Ruska-Ufer entsteht die neue, unterirdische Beschleunigerhalle. Sie bildet den Kern der kompakten Anlage bestehend aus einem Linearbeschleuniger (Linac) mit Energierückgewinnung. [...].

  • <p></p> <p class="MsoNormal"><span></span><span>The neutron images (left row) detect the distribution of liquids in this filled tooth, whereas the X-ray-CT shows the microstructure and pores in the material. A comparision of both images allows to see which pores are filled with liquids. Credit: HZB</span></p>13.03.2015

    Neutrons and X-rays show how to prepare durable tooth cement

    There are many ways to mix cements for tooth fillings, but it can be difficult to tell which way works best. Now, a team of scientists from Copenhagen, Denmark, has come up with an answer: They used neutron imaging and x-ray-microtomography at HZB to analyze fillings with glass ionomere cements, prepared by different methods. Their results, now published in  Scientific Reports, demonstrate how much the order of mixing steps matters to obtain a nearly homogenous filling without large liquid-filled pores which reduce stability. [...].

  • <p>Experimentieren mit Spa&szlig;: Die Sch&uuml;lerlabor-AG trifft sich immer donnerstags in Wannsee. Foto: HZB</p>06.03.2015

    Eine neue Schülerlabor-AG am Helmholtz-Zentrum Berlin experimentiert zu Energiefragen im Alltag


    Wie viel Strom verbraucht ein Smartphone? Wo kommt unser Strom her? Und wie teuer ist er eigentlich? Das Schülerlabor des Helmholtz-Zentrum Berlin bietet am Standort Wannsee für Kinder der 5. bis 7. Klassen eine neue Arbeitsgruppe an. Immer donnerstags treffen sich zehn Mädchen und Jungen, um zu experimentieren und diesen Fragen auf den Grund zu gehen. [...].

  • <p>Credit: HZB</p>05.03.2015

    Workshop on “Microstructure Characterization and Modeling for Solar Cells”

    The winter workshop was held in a beautiful location at Spitzingsee (Bayern) from 22. to 26. february 2015 and organised by Helmholtz Virtual Institute "Microstructure Control for Thin-Film Solar Cells". In this Virtual Institute the formation of structural defects and related strain during the growth of thin film solar cells will be investigated by combining various experimental as well as simulation approaches.The next winter workshop will be planned for 2017. [...].

  • <p>Kesterite f&uuml;r Solarzellen und solare Brennstoffe: Die Graduiertenschule <a href="/angebote/jobskarriere/promotion/index_de.html">MatSEC </a>vereint f&auml;cher&uuml;bergreifende Experitise. Foto: HZB/Kodalle</p>04.03.2015

    Graduiertenschule MatSEC diskutiert über Kesterite für Solarzellen


    Am 2. Februar 2015 trafen sich die Mitglieder der Graduiertenschule MatSEC auf dem Lise-Meitner-Campus des HZB zum wissenschaftlichen Austausch. In der Graduiertenschule MatSEC forschen die Promovierenden an neuartigen Materialsystemen für die solare Energieumwandlung, den Kesteriten. Das Forschungskolloquium findet halbjährlich statt und ist fester Bestandteil des Curriculums der Graduiertenschule. [...].

  • <p>Instagram ist ideal, um tolle Bilder aus der Forschung zu kommunizieren, hier zum Beispiel einen Lichtofen f&uuml;r die Kristallzucht. Foto: N. Islam/HZB</p>02.03.2015

    Das HZB auf Instagram


    Immer mehr Menschen nutzen ihr Smartphone, um zum Beispiel in einer Pause ein paar Bilder mit kurzen Infos anzusehen. Nun können sie beim Stöbern in dem beliebten Bildernetzwerk Instagram auch auf Themen aus dem HZB stoßen. Seit Neuestem postet dort die Kommunikationsabteilung besonders schöne, spektakuläre Bilder, die knapp erläutert und mit Links zu mehr Informationen versehen sind. [...].

  • 26.02.2015

    Universität Bielefeld und HZB kooperieren zu Nanoschichten und komplexen Materialien


    Im Februar 2015 haben Uni-Rektor Professor Dr.-Ing. Gerhard Sagerer, Uni-Kanzler Dr. Stephan Becker und die Geschäftsführer des HZB, Professorin Dr.-Ing. Anke Kaysser-Pyzalla und Thomas Frederking eine Vereinbarung über die Zusammenarbeit unterschrieben. Darin heißt es: „Die Kooperation soll zur Steigerung der wissenschaftlichen Exzellenz der Partner und zur Entwicklung regionaler Kompetenznetzwerke in Forschung, Lehre und Ausbildung des wissenschaftlichen Nachwuchses beitragen.“ [...].

  • <p></p> <p>The scanning electron microscopies (SEM) show how regularly the funnels etched in a silicon substrate are arranged (left: the line segment = 5 microns; right: 1 micron). The funnels measure about 800 nanometres in diameter above and run down to about a hundred nanometres at the tip. Credit: S. Schmitt / MPL</p>24.02.2015

    Learning by eye: silicon micro-funnels increase the efficiency of solar cells

    A biological structure in mammalian eyes has inspired a team headed by Silke Christiansen to design an inorganic counterpart for use in solar cells. With the help of conventional semiconductor processes, they etched micron-sized vertical funnels shoulder-to-shoulder in a silicon substrate. Using mathematical models and experiments, they tested how these kind of funnel arrays collect incident light and conduct it to the active layer of a silicon solar cell. Their result: this arrangement of funnels increases photo absorption by about 65% in a thin-film solar cell fitted with such an array and is reflected in considerably increased solar cell efficiency, among other improved parameters. [...].

  • <p>Dichromium: both chromium atoms "share" the&nbsp; 12 valence electrons which leads to a multible bond. Graphics: HZB</p>23.02.2015

    Stretch and relax! – Losing one electron switches magnetism on in dichromium

    An international team of scientists from Berlin, Freiburg and Fukuoka has provided the first direct experimental insight into the secret quantum life of dichromium. Whereas in its normal state the 12 valence electrons form a strong multiple bond between the two chromium atoms, removing only one electron changes the situation dramatically: 10 electrons localize and align their spins, thus resulting in ferromagnetic behavior of the dichromium-kation. The bonding is done by one electron only, resulting in a much weaker bond. The scientists used the unique Nanocluster Trap experimental station at the BESSY II synchrotron radiation source at Helmholtz-Zentrum Berlin and published their results in the Journal Angewandte Chemie. [...].

  • 23.02.2015

    HZB-Zeitung „lichtblick“ erschienen


    Berlin ist für junge ausländische Forscherinnen und Forscher attraktiv. Doch es ist am Anfang nicht leicht, sich in Deutschland und am Helmholtz-Zentrum Berlin zu orientieren. Eine Postdoc-Initiative hilft nun, dass junge Wissenschaftler nach der Promotion besser am Zentrum Fuß fassen können. Wir stellen die Menschen hinter dieser Initiative und ihr Anliegen in der aktuellen Ausgabe vor. Hier geht es zur Online-Ausgabe der Zeitung. [...].

  • <p>Prof. Dr. Joachim Dzubiella</p>20.02.2015

    Joachim Dzubiella receives ERC Consolidator Grant

    Over the next five years, additional research funding in the amount of 2 million Euros will be available to HZB’s Prof. Dr. Joachim Dzubiella. The theoretical physicist, who teaches at Berlin’s Humboldt University and who also heads an HZB research group, is the latest recipient of a European Research Council Consolidator Grant.

    The Consolidator Grant program’s mission is to help support junior researchers who have earned their Ph.D. within the last 7 to 12 years and whose goal it is to embark on an ambitious research project, which builds on their doctoral research. [...].

  • <p>Prof. Dr. J&uuml;rgen Janek, Universit&auml;t Gie&szlig;en</p>20.02.2015

    Distinguished Lectures at HZB: Prof. Jürgen Janek will give talk about the Materials Research for "Next Generation" Batteries

    The search for new and the development of improved electrochemical energy storage systems stimulates world-wide research efforts in both academia and industry. While impressive improvements and cost reductions are still to be expected for lithium ionbatteries (LIB) and are part of enormous industrial efforts, more fundamental research aims for the creation and understanding of completely new cell types. [...].

  • <p><br />The High-Field Magnet (HFM) has attained 26 tesla in an initial test and thereby exceeded expectations. The HFM team is pleased about the well-deserved success.<br /><br />Credit: HZB/Ingo Kniest</p>19.02.2015

    The BER II neutron source is back in operation and available for experiments following the interruption in availability

    Maintenance work has been successfully concluded – the High-Field Magnet has successfully attained 26 tesla in initial testing. New scientific experiments have become possible.

    Berlin, February 2015: following conclusion of more than a of year of repairs and refurbishing, the BER II neutron source will shortly be available to its international user group again. The facility was powered up on Wednesday, February 18 and attained its nominal power level of 9,5 megawatts. Scientists of HZB are meanwhile preparing the measurement equipment so that experimental work can resume following a brief start-up period. [...].

  • <p>The insulating LFO-layer in its normal state is antiferromagnetically ordered (AFM) and has no ferromagnetic domains. Due to the proximity to the ferromagnetic LSMO, ferromagnetic domains develop (white arrows) at the interface, pointing into the opposite direction of the LSMO-layer.</p> <p>Credit: HZB</p>17.02.2015

    Insight into inner magnetic layers

    Measurements at BESSY II have shown how spin filters forming within magnetic sandwiches influence tunnel magnetoresistance – results that can help in designing spintronic components.

    Research teams from Paris, Madrid and Berlin have observed for the first time how magnetic domains mutually influence one another at interfaces of spintronic components. Using measurements taken at BESSY II, they could demonstrate that what are known as spin filters form between the outer ferromagnetic layers and the inner anti-ferromagnetic insulating layer, influencing tunnel magnetoresistance (TMR). In doing so, the teams enhanced our understanding of processes that are important for future TMR data storage devices and other spintronic components. Their results have now been published in Nature Communications (DOI: 10.1038/ncomms7306). [...].

  • <p>Sch&uuml;lerinnen und Sch&uuml;ler f&uuml;r Naturwissenschaften begeistern: Das HZB-Sch&uuml;lerlabor bot einen Workshop zu Magnetismus und Supraleitung an. Foto: G. Lampert</p>16.02.2015

    HZB-Schülerlabor beteiligt sich am MINT400-Hauptstadtforum


    Das Schülerlabor hat am Standort Wannsee im Rahmen des MINT400-Hauptstadtforums einen Workshop zum Thema  „Magnetismus und Supraleitung“  angeboten. 16 Schülerinnen und Schüler aus ganz Deutschland haben teilgenommen. Am Projekttag wurden Experimente mit Supermagneten zu Induktion, Wirbelstrom und Diamagnetismus durchgeführt. Im weiteren Verlauf wurde der Meißner-Ochsenfeld-Effekt mit YBCO-Supraleitern erkundet, die dazu mit flüssigem Stickstoff unterhalb ihrer Übergangstemperatur Tc abgekühlt wurden. Anschließend stand eine Führung durch die Augentumortherapie auf dem Programm. Der Tag endete mit weiteren Tiefkühlexperimenten und einem Laptop-Quiz zu den Themen des Tages. [...].

  • <p>Schon auf der Er&ouml;ffnungsveranstaltung war das HZB gut vertreten. Viele Arbeitsgruppen freuen sich nun auf die enge Zusammenarbeit im neuen Joint Lab mit den Kolleginnen und Kollegen aus der Theorie und der Simulation. Foto: Andreas Kubatzki/HZB</p>13.02.2015

    BerOSE - Joint Lab für Modellierung von Nanooptischen Strukturen


    HZB gründet mit FU Berlin und Zuse Institut Berlin das „Berlin Joint Lab for Optical Simulations for Energy Research (BerOSE)“

    Das Konrad-Zuse-Zentrum für Informationstechnik Berlin, die Freie Universität Berlin und das Helmholtz-Zentrum Berlin richten mit dem „Berlin Joint Lab for Optical Simulations for Energy Research (BerOSE)“ eine gemeinsame Forschungs-Plattform ein. Das neue Joint Lab dient der Erforschung und Weiterentwicklung von Materialien für Photokatalyse, Photovoltaik und Photonik mit Strukturierungen im Nanometerbereich. Ein wichtiger Schwerpunkt sind 3D-Simulationen für Einzelkomponenten und komplette funktionale Systeme. [...].

  • <p>This illustrates a moment captured for the first time in experiments at SLAC National Accelerator Laboratory. The CO-molecule and oxygen-atoms are attached to the surface of a ruthenium catalyst. When hit with an optical laser pulse, the reactants vibrate and bump into each other and the carbon atom forms a transitional bond with the lone oxygen center. The resulting CO<sub>2</sub> detaches and floats away. Credit: SLAC National Accelerator Laboratory</p>12.02.2015

    Details of a crucial reaction: Physicists uncover oxidation process of carbon monoxide on a ruthenium surface

    An international team has observed the elusive intermediates that form when carbon monoxide is oxidized on a hot ruthenium metal surface. They used ultrafast X-ray and optical laser pulses at the SLAC National Accelerator Laboratory, Menlo Park, California. The reaction between carbon monoxide and adsorbed oxygen atoms was initiated by heating the ruthenium surface with optical laser pulses. Directly afterwards, changes in the electronic structure of oxygen atoms were probed via X-ray absorption spectroscopy as they formed bonds with the carbon atoms.The observed transition states are consistent with density functional theory and quantum oscillator models. [...].

  • <p>F&uuml;r das Titelbild hat Teamleiter Peter Smeibidl seine Leute zum Klettern motiviert; die Ingenieure haben darin viel &Uuml;bung, denn beim Aufbau der gewaltigen Struktur m&uuml;ssen sie ohnehin &uuml;berall ran. Foto: Ingo Kniest/HZB</p>12.02.2015

    Forschungsmagazin „Sichtbar“: Große Forschung, interessante Leute, neue Perspektiven


    Auf dem Titelbild prangt ein echter Star: Der neue Hochfeldmagnet, umgeben und beklettert von den Physikerinnen und Experten, die in den letzten sieben Jahren am Aufbau dieses weltweit einzigartigen Großgeräts mitgearbeitet haben. Auch im Heft finden Sie Bilder und Geschichten aus der HZB-Forschung, die wir manchmal auch aus einer anderen Perspektive erzählen als sonst. [...].

  • <p>180 scientists listened to the lectures. <span>The aim of the dialogue is to identify future scientific fields as well as expectations, needs and requirements</span> for BESSY II.</p>05.02.2015

    BESSY II – From Pico to Femto – time resolved studies at BESSY II

    180 scientists attended the workshop about time resolved studies

    From 26 to 27 January 2015, at the HZB workshop “From Pico to Femto”, more than 180 scientists discussed the advantages of conducting measurements on different time scales. With BESSY VSR, HZB is looking forward to perform a so-far unique upgrade to an electron storage ring: When complete, BESSY II will offer a flexible pulse duration of the useful light without diminishing the brilliancy of the light pulses.


  • 04.02.2015

    An new look at technicians and researchers: Exhibition at BESSY building

    For one whole year, Kevin Fuchs took photographs at Helmholtz-Zentrum Berlin. The pictures make up the final project of his photography studies at the Ostkreuz School of Photography. Selected works will be on display in the main BESSY building until 13 April 2015. Kevin Fuchs has spoken with us about his work at HZB. [...].

  • <p>The local magnetisation is depicted by small arrows; a magnetic vortex is located in the centre. A brief current pulse through this nano-wire deflects the skyrmion&nbsp; out of its rest position; it then moves back to its initial position on a spiral trajectory. This motion can be observed with the help of X-ray holography. The skyrmion and the spiral shape of its trajectory are represented schematically above the structure. Credit: Johannes Gutenberg-Universit&auml;t Mainz</p>02.02.2015

    Spintronics: Dance of the nanovortices

    Joint press release from TU Berlin and HZB

    The trajectories of small magnetic entities referred to as skyrmions have been captured and recorded with the help of X-ray holography. Researchers gained new insight from the analysis of this motion: these nanoscale vortices possess mass. The discovery is published in Nature Physics 2 February 2015. [...].

  • <p>Nanodiamonds are tiny crystals only a few nanometres in size. Credit: <span>Mohamed Sennour, MINES ParisTech</span>.</p>28.01.2015

    Holes in valence bands of nanodiamonds discovered

    Researchers hope that their properties might be altered to permit nanodiamonds to be used as catalysts for generating hydrogen from sunlight.

    Nanodiamonds are tiny crystals only a few nanometres in size. While they possess the crystalline structure of diamonds, their properties diverge considerably from those of their big brothers, because their surfaces play a dominant role in comparison to their extremely small volumes. Suspended in aqueous solutions, they could function as taxis for active substances in biomedical applications, for example, or be used as catalysts for splitting water. But how are the electronic properties of nanodiamonds deposited on a solid-state substrate different from those displayed by nanodiamonds in aqueous solutions?  Dr. Tristan Petit working in the HZB team headed by Prof. Emad F. Aziz has now investigated this with the help of absorption and emission spectroscopy at BESSY II. Their results, just published in Nanoscale, demonstrate that nanodiamonds display valence holes in aqueous solutions, which are not observed when characterized as a thin film. [...].

  • <p>All about Kesterite-Solarcells, just published. Credit: Wiley</p>23.01.2015

    Just published: New book on CZTS-based thin film solar cells published

    In time at the start of the new year the book "Copper Zinc Tin Sulfide-based Thin Film Solar Cells" is published (Wiley, 2015, ed. by K. Ito), in which also scientists from the HZB are involved. Thomas Unold, Justus Just and Hans-Werner Schock provided the chapter "Coevaporation of CZTS Films and Solar Cells", Susan Schorr has contributed the chapter "Crystallographic Aspects of CZTS". [...].

  • <p>Prof. Bernd Rech (Foto: HZB) im <a href="" class="Extern">Interview</a> bei Welt der Physik</p>23.01.2015

    Heute schon geforscht? Bernd Rech im Podcast von Welt der Physik


    Im wöchentlichen Podcast der Internetplattform "Welt der Physik" spricht Bernd Rech, Leiter des HZB-Instituts für Silizium-Photovoltaik und Sprecher des Helmholtz-Forschungsprogramms Erneuerbare Energien, in der Folge 177 über aktuelle Trends zum Thema Solarzellen. Er beschreibt die Vor- und Nachteile von anorganischen und organischen Solarmaterialien. Und er stellt eine der neuesten Entwicklungen aus seinem Institut vor, eine Kombination aus zwei Siliziumschichten und einem organischen Material. [...].

  • <p>Ausstellung der Bilder von Kevin Fuchs ab 29. Januar im BESSY-II-Geb&auml;ude, hier eine Aufnahme von der Ausstellung im SEZ Berlin.</p>22.01.2015

    My Beamline - Eröffnung einer Fotoausstellung im BESSY-Hauptgebäude


    Kevin Fuchs hat im Rahmen seines Fotografiestudiums den Synchrotronring BESSY II und den Forschungsreaktor BER II besucht. Für seine Abschlussarbeit hat er Anlagen und Menschen auf interessante Weise in Szene gesetzt. Ab 29. Januar werden die Bilder nun im BESSY II-Gebäude (3. Etage) für zirka zwei Monate zu sehen sein. Zur Ausstellungseröffnung mit kleinem Umtrunk am 29. Januar, 14:00 Uhr, laden wir alle HZB-Mitarbeiterinnen und Mitarbeiter sowie Gäste herzlich ein. Wir bitten um Anmeldung per mail an [...].

  • <p>Hard disc from space: the Pallasite meteorite, studied by Harrison, contains information about the early solar system.<br /><em>Credit: Image copyright Natural History Museum, London. Sample used from the Natural History Museum Meteorite Collection.</em></p>22.01.2015

    Messages From Space

    Geologists from the University of Cambridge uncover hidden magnetic messages from the early solar system in meteorites measured at BESSY II. The team of scientists led by Dr. Richard Harrison has captured information stored inside tiny magnetic regions in meteorite samples using the PEEM-Beamline at BESSY II.

    This information captures the dying moments of the magnetic field during core solidification on a meteorite parent body, providing a sneak preview of the fate of Earth’s own magnetic field as its core continues to freeze. [...].

  • <p>Artificial catalysts imitate natural photo-synthesis.<br />Image Credit: HZB</p>21.01.2015

    The path to artificial photosynthesis

    HZB researchers describe efficient manganese catalyst capable of converting light to chemical energy

    Scientists at the Helmholtz Center for Materials and Energy (HZB) in collaboration with the School of Chemistry and ARC Centre of Excellence for Electromaterials Science at Monash University, Australia, have precisely characterized a manganese catalyst’s electronic states. The catalyst is capable of converting light to chemical energy. [...].

  • 20.01.2015

    Dancing BESSY-VSR

    Paul Goslawski from Godehard Wüstefeld's team was the initiator of this project: Why not demonstrate in vivid form, what the future project BESSY-VSR is all about? With novel cavities to be introduced in synchrotron storage ring BESSY II, the new BESSY-VSR is supposed to compress some of the stored electron buckets. So it is possible to produce brilliant light pulses with variable length: short and long pulses in one ring. The user is able to choose what kind of pulse he needs for his experiment. But the team still has to solve some tricky problems.

    Two short movies are now produced to show how BESSY-VSR works and what remains to be solved: The principle as well as the difficulties are now being performed with a dance! [...].

  • 15.01.2015

    HZB baut Forschung an elektrochemischen Energiespeichern aus


    Arbeitsgruppen am HZB untersuchen neuartige Batteriesysteme und elektrochemische Energiespeicher im Helmholtz-Forschungsprogramm „Speicher und vernetzte Infrastrukturen“

    Die Energiewende in Deutschland ist eine langfristige Aufgabe, auch für die Forschung.  Die Helmholtz-Gemeinschaft hat nun das Forschungsprogramm „Speicher und vernetzte Infrastrukturen“ aufgelegt, in dem fünf Helmholtz-Zentren an  systemübergreifenden Technologien forschen,  um Schwankungen auszugleichen und Infrastrukturen so weiterzuentwickeln, dass unterschiedliche Energieträger miteinander gekoppelt werden können. Das Programm hat ein 5-Jahres-Budget von rund 310 Millionen Euro. Das Helmholtz-Zentrum Berlin widmet sich insbesondere der Grundlagenforschung und Weiterentwicklung von elektrochemischen Energiespeichern oder Batterien. [...].

  • <p>A general view of the VEKMAG end-station. The vector magnet chamber (grey) is supported by a hexapod frame. Below the magnet&nbsp; one can distinguish the detector chamber (green) and&nbsp; in the forward direction the deposition chamber (dark grey) is displayed. The beam quality is monitored by a diagnostic chamber (yellow) positioned in front of the magnet chamber. Graphics: Dr. Tino Noll</p>14.01.2015

    “VEKMAG” at BESSY II creates 3D magnetic fields in samples

    Together with HZB, teams from the Universität Regensburg, from the Freie Universität Berlin and from  the  Ruhr Universität Bochum have jointly set up a unique measurement station at BESSY II: a vector electromagnet consisting of three mutually perpendicular Helmholtz coils which enables  setting the local magnetic field at the sample position  to any orientation desired. The first measurements of magnetic materials, spin systems, and nanostructured magnetic samples are scheduled for early 2015. [...].

  • <p><span class="imageCaption">Researchers at PSI spotted a curious black-and-white magnetic substructure on a five-by-five micrometre square &ndash; and were reminded of the stylised Batman logo. The black areas reveal where the magnetisation is pointing downwards, i.e. into the picture; the white ones where it is pointing upwards. Credit:PSI<br /></span></p>12.01.2015

    Batman lights the way to compact data storage

    Researchers at the Paul Scherrer Institute (PSI) have succeeded in switching tiny, magnetic structures using laser light and tracking the change over time. In the process, a nanometre-sized area bizarrely reminiscent of the Batman logo appeared. The research results could render data storage on hard drives faster, more compact and more efficient. [...].

  • <p>The a-Si:H is deposited on a AZO-film that acts as a transparent front contact. A ITO-layer serves as rear contact. The organic sub-cell possesses a front contact made of a conductive polymer material (PEDOT) and a metallic rear contact. Credit: University Potsdam</p>12.01.2015

    Maximum efficiency, minimum materials and complexity

    Silicon-based thin-film solar cell with a supplementary organic layer can utilise infrared light as well

    The cell consists of many active layers, which taken together are less than one micron thick. The new hybrid solar cell is constructed of two extremely thin layers of amorphous silicon as well as an organic layer. Despite the low volume of materials employed, the hybrid cell attains recording-breaking efficiency of 11.7%. The organic layer is made of fullerenes, also known as “soccer ball molecules”, mixed with semiconducting polymers. It is able to convert infrared light that cannot be utilised by the silicon layers into electrical energy. [...].

  • <p>HZB-scientists Karsten Holldack, Alexander Schnegg and Joscha Nehrkorn at the BESSY II Beamline. Credit: HZB</p>06.01.2015

    New light shed on electron spin flips

    Researchers from Berlin Joint EPR Lab at Helmholtz-Zentrum Berlin (HZB) and University of Washington (UW) derived a new set of equations that allows for calculating electron paramagnetic resonance (EPR) transition probabilities with arbitrary alignment and polarization of the exciting electromagnetic radiation. The validity of the equations could be demonstrated with a newly designed THz-EPR experiment at HZB’s storage ring BESSY II. This progress is relevant for a broad community of EPR users and is published in Physical Review Letters on January 6. 2015. [...].