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96 Current news of Helmholtz-Zentrum Berlin für Materialien und Energie
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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: ...
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 ...
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 ...
"Molecular scissors" for plastic waste
15-Apr-2019
A research team from the University of Greifswald and Helmholtz-Zentrum-Berlin (HZB) has solved the molecular structure of the important enzyme MHETase at BESSY II. MHETase was discovered in bacteria and together with a second enzyme - PETase - is able to break down the widely used plastic PET ...
Catalyst research for solar fuels: Amorphous molybdenum sulphide works best
08-Apr-2019
Efficient and inexpensive catalysts will be required for production of hydrogen from sunlight. Molybdenum sulphides are considered good candidates. A team at HZB has now explained what processes take place in molybdenum sulphides during catalysis and why amorphous molybdenum sulphide works ...
Water is more homogeneous than expected
22-Feb-2019
In order to explain the known anomalies in water, some researchers assume that water consists of a mixture of two phases even under ambient conditions. However, new X-ray spectroscopic analyses at BESSY II, ESRF and Swiss Light Source show that this is not the case. At room temperature and normal ...
Molecules that self-assemble into monolayers for efficient perovskite solar cells
28-Nov-2018
A team at the HZB has discovered a new method for producing efficient contact layers in perovskite solar cells. It is based on molecules that organise themselves into a monolayer. In recent years, solar cells based on metal halide perovskites have achieved an exceptional increase in efficiency. ...
Transition metal complexes: mixed works better
20-Nov-2018
A team at BESSY II has investigated how various iron-complex compounds process energy from incident light. They were able to show why certain compounds have the potential to convert light into electrical energy. The results are important for the development of organic solar ...
Graphene on the way to superconductivity
14-Nov-2018
Scientists at HZB have found evidence that double layers of graphene have a property that may let them conduct current completely without resistance. They probed the bandstructure at BESSY II with extremely high resolution ARPES and could identify a flat area at a surprising location. Carbon ...
Nanodiamonds as photocatalysts
22-Oct-2018
Diamond nanomaterials are considered hot candidates for low-cost photocatalysts. They can be activated by light and can then accelerate certain reactions between water and CO2 and produce carbon-neutral "solar fuels". The EU project DIACAT has now doped such diamond materials with boron and shown ...
