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103 Current news of Helmholtz-Zentrum Berlin für Materialien und Energie

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World record for tandem perovskite-CIGS solar cell

11-Sep-2019

A team headed by Prof. Steve Albrecht from the HZB will present a new world-record tandem solar cell at EU PVSEC, the world's largest international photovoltaic and solar energy conference and exhibition, in Marseille, France on September 11, 2019. This tandem solar cell combines the ...

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Nanoparticles in lithium-sulphur batteries detected with neutron experiment

09-Sep-2019

An HZB team has for the first time precisely analysed how nanoparticles of lithium sulphide and sulphur precipitate onto battery electrodes during the course of the charging cycle. The results can help increase the service life of lithium-sulphur batteries. Lithium-sulphur batteries are regarded ...

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Analytical tool designs corkscrew-shaped nano-antennae

Save time using maths

26-Aug-2019

For the first time, an HZB team has derived analytically how corkscrew-shaped nano-antennas interact with light. The mathematical tool can be used to calculate the geometry that a nano-antenna must have for specific applications in sensor technology or information technology. The nanostructures ...

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Tomoscopy: new imaging method

Thanks to a world record in tomography, synchrotron radiation can be used to watch how metal foam forms

22-Aug-2019

An international research team at the Swiss Light Source (SLS) has set a new tomography world record using a rotary sample table developed at the HZB. With 208 three-dimensional tomographic X-ray images per second, they were able to document the dynamic processes involved in the foaming of liquid ...

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Alternative material investigated for superconducting radio-frequency cavity resonators

18-Jul-2019

In modern synchrotron sources and free-electron lasers, superconducting radio-frequency cavity resonators are able to supply electron bunches with extremely high energy. These resonators are currently constructed of pure niobium. Now an international collaboration has investigated the potential ...

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Charge transfer within transition-metal dyes analysed

11-Jul-2019

Transition-metal complexes in dye-based solar cells are responsible for converting light into electrical energy. A model of spatial charge separation within the molecule has been used to describe this conversion. However, an analysis at BESSY II shows that this description of the process is too ...

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Utrafast magnetism: electron-phonon interactions examined at BESSY II

02-Jul-2019

How fast can a magnet switch its orientation and what are the microscopic mechanisms at play ? These questions are of first importance for the development of data storage and computer chips. Now, an HZB team at BESSY II has for the first time been able to experimentally assess the principal ...

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Copper oxide photocathodes: laser experiment reveals location of efficiency loss

13-May-2019

Solar cells and photocathodes made of copper oxide might in theory attain high efficiencies for solar energy conversion. In practice, however, large losses occur. Now a team at the HZB has been able to use a sophisticated femtosecond laser experiment to determine where these losses take place: ...

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3D tomographic imagery reveals how lithium batteries age

09-May-2019

Lithium batteries lose amp-hour capacity over time. Microstructures can form on the electrodes with each new charge cycle, which further reduces battery capacity. Now an HZB team together with battery researchers from Forschungszentrum Jülich, the University of Munster, and partners in China have ...

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Inorganic perovskite absorbers for use in thin-film solar cells

29-Apr-2019

A team at the Helmholtz-Zentrum Berlin has succeeded in producing inorganic perovskite thin films at moderate temperatures using co-evaporation – making post-tempering at high temperatures unnecessary. The process makes it much easier to produce thin-film solar cells from this material. In ...

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