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

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Third-highest oxidation state secures rhodium a place on the podium

Discovery is a real surprise

19-Jul-2022

Oxidation states of transition metals describe how many electrons of an element are already engaged in bonding, and how many are still available for further reactions. Scientists from Berlin and Freiburg have now discovered the highest oxidation state of rhodium, indicating that rhodium can ...

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Potential energy surfaces of water mapped for the first time

A better understanding of the chemistry of water

12-Jul-2022

Liquids are more difficult to describe than gases or crystalline solids. An HZB team has now mapped the potential energy surfaces of water molecules in liquid water under ambient conditions for the first time at the Swiss Light Source SLS of the Paul Scherrer Institute, Switzerland. This ...

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Calculating the "fingerprints" of molecules with artificial intelligence

16-Jun-2022

With conventional methods, it is extremely time-consuming to calculate the spectral fingerprint of larger molecules. But this is a prerequisite for correctly interpreting experimentally obtained data. Now, a team at HZB has achieved very good results in significantly less time using self-learning ...

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Water distribution in the fuel cell made visible in 4D

The analysis opens new possibilities for more efficient and thus more cost-effective fuel cells

09-Jun-2022

Teams from Helmholtz-Zentrum Berlin (HZB) and University College London (UCL) have visualised the water distribution in a fuel cell in three dimensions and in real time for the first time by evaluating neutron data from the Berlin Experimental Reactor shut down in 2019. The analysis opens new ...

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Predicting solar cell performance from terahertz and microwave spectroscopy

Reliably determine the mobility and lifetime of the charge carriers in new semiconducting materials

08-Mar-2022

Many semiconducting materials are possible candidates for solar cells. In recent years, perovskite semiconductors in particular have attracted attention, as they are both inexpensive and easy to process and enable high efficiencies. Now a study with 15 participating research institutions shows ...

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An electronic rainbow – perovskite spectrometer by inkjet printing

04-Jan-2022

Researchers from Innovation Lab HySPRINT at Helmholtz-Zentrum Berlin (HZB) and Humboldt Universität zu Berlin (HU) have used an advanced inkjet printing technique to produce a large range of photodetector devices based on a hybrid perovskite semiconductor. By mixing of only three inks, the ...

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New world record in materials research - X-ray microscopy with 1000 tomograms per second

"This method opens a door for the non-destructive study of fast processes in materials, which is what many research groups and also industry have been waiting for"

29-Sep-2021

Tomoscopy is an imaging method in which three-dimensional images of the inside of materials are calculated in rapid succession. Now a team led by HZB physicist Francisco García Moreno has achieved a new world record at the TOMCAT beamline of the Swiss Light Source at the Paul Scherrer Institute: ...

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When vibrations increase on cooling: Anti-freezing observed

Completely unusual and never observed like this before

10-Aug-2021

An international team has observed an amazing phenomenon in a nickel oxide material during cooling: Instead of freezing, certain fluctuations actually increase as the temperature drops. Nickel oxide is a model system that is structurally similar to high-temperature superconductors. The experiment ...

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Water detected as a metal at BESSY II

02-Aug-2021

Under normal conditions, pure water is an almost perfect insulator. Water only develops metallic properties under extreme pressure, such as exists at most in the interior of large planets. Now, an international collaboration has used a completely different approach to produce metallic water and ...

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Perovskite Solar Cells: Insights into early stages of structure formation

Colloidal chemistry of perovskite precursor solutions investigated

25-Jun-2021

Using small-angle scattering at the PTB X-ray beamline of BESSY II, an HZB team was able to experimentally investigate the colloidal chemistry of perovskite precursor solutions used for solar cell production. The results contribute to the targeted and systematic optimization of the manufacturing ...

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