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Perovskite solar cells: Defects trap charge carriers - and release them again An international team at HZB and Charles University Prague has investigated how charge carriers in so called MAPI-perovskite semiconductors interact with different defects. Their results help to improve perovskite solar cells.
New world record in materials research - X-ray microscopy with 1000 tomograms... With 1000 tomograms per second, it is now possible to non-destructively document very fast processes and developments in materials on the micrometre scale, such as the burning of a sparkler or the foaming of a metal alloy ....
Technology Transfer Award ceremony on 5.10.: Visit the poster exhibitions On 5 October, the best innovation project from HZB will be awarded the Technology Transfer Prize 2021. The award ceremony will be broadcast online from the BESSY II lecture hall from 2 pm. You can already find out about all the submitted projects in our ...
HZB uses electricity-producing facade wall as real laboratory In the presence of the State Secretary for Economic Affairs, Energy and Operations of the State of Berlin, Christian Rickerts, the HZB officially commissioned the solar façade of a new research building on 6 September 2021. What makes it so special is ...
On the trail of lithium dendrites: How destructive formations develop in... A group of researchers has taken a look inside lithium batteries and examined in more detail the structures that severely limit the service life of batteries. Their results provide starting points for longer-lasting and safer lithium batteries.
Perovskite solar cells: Interfacial loss mechanisms revealed Metal-organic perovskite materials promise low-cost and high-performance solar cells. Now a group at HZB managed to de-couple the different effects of self-assembled monolayers of organic molecules (SAMs) that reduce losses at the interfaces.
Green hydrogen: Why do certain catalysts improve in operation? Now a HZB-team headed by Marcel Risch has observed at BESSY II how two simultaneous mechanisms are responsible for this. The catalytic activity of the individual catalysis centres decreases, but the morphology of the catalyst layer also changes.
When vibrations increase on cooling: Anti-freezing observed An international team has observed an amazing phenomenon in a nickel oxide material during cooling: Instead of freezing, certain fluctuations actually increase as the temperature drops. This is interesting also for high Tc-Superconductor research.
Lead-free perovskite solar cells - How fluoride additives improve quality Using a clever combination of measurement methods at BESSY II and with NMR at the Humboldt-University Berlin, they were able to show that fluoride prevents the oxidation of tin and leads to a more homogeneous film formation with fewer defects.
Future information technologies: Topological materials for ultrafast spintronics Using time- and spin-resolved methods at BESSY II, the physicists explored how, after optical excitation, the complex interplay in the behavior of excited electrons in the bulk and on the surface results in unusual spin dynamics.
VIPERLAB: EU project aims to boost perovskite solar industry in Europe HZB is coordinating a major European collaborative project to open up new opportunities for the European solar industry. The VIPERLAB project involves 15 renowned research institutions from Europe, as well as Switzerland and Great Britain.
The Radio TEDDY experimental show with the HZB - tune in on Saturdays at 2.40... The Helmholtz-Zentrum Berlin and Radio TEDDY continue their successful cooperation. In the next round, we will provide ideas for six exciting experiments that the Radio TEDDY moderator Leo will conduct for the children in front of the radio.
Accelerator physics: Experiment reveals new options for synchrotron light... Using this method, specialised synchrotron radiation sources would potentially be able to fill a gap in the arsenal of available light sources and offer a prototype for industrial applications. The work was published in Nature.
Perovskite/silicon tandem solar cells on the threshold of 30% efficiency The tandem cell provided stable performance for 300 hours – even without encapsulation. To accomplish this, the group headed by Prof. Steve Albrecht investigated physical processes at the interfaces to improve the transport of the charge carriers.
Future Information Technologies: Germanium telluride's hidden properties at the... Germanium Telluride is an interesting candidate material for spintronic devices. At BESSY II, a Helmholtz-RSF Joint Research Group has revealed how the spin texture switches by ferroelectric polarization within individual nanodomains.
Order in the disorder: density fluctuations in amorphous silicon discovered Such a-Si:H thin films have been used for decades in solar cells, TFT displays, and detectors. The results show that three different phases form within the amorphous matrix, which influences the quality and lifetime of the semiconductor layer.