HZB hosts Humboldt Research Award Winner Alexei Gruverman
An award by Humboldt-foundation enables Professor Alexei Gruverman to visit the HZB institute "Functional oxides for energy efficient information technology". © privat
Professor Alexei Gruverman was granted a Humboldt Research Award in October 2020. Due to the COVID pandemic, he could not travel until this year. For a few months he is now hosted by Helmholtz-Zentrum Berlin at the Institute “Functional oxides for energy efficient information technology”.
The renowned award is endowed with 60 000 Euros and is presented annually by the Alexander von Humboldt Foundation to outstanding scientists from abroad to support collaborative projects with researchers in Germany.
“We are very much honored and happy to welcome Alexei Gruverman at the HZB. He is a worldwide leading scientist in the field of nanoscale ferroelectrics. We will further develop our cooperation with him on several topics”, says Prof. Catherine Dubourdieu, head of the institute “Functional oxides for energy efficient information technology” at HZB.
Professor Alexei Gruverman is a Charles Bessey Professor at the Department of Physics and Astronomy, University of Nebraska-Lincoln, USA. His research includes diverse scientific subjects from nanoscale static and dynamic properties of ferroic materials, to electronic properties of polar surfaces, and electromechanical properties of biomaterials.
The Humboldt Research Award recognizes his outstanding research achievements in the field of fundamental studies of nanoscale physical phenomena in a wide range of materials using a variety of scanning probe microscopy (SPM) methods. Gruverman has pioneered the development of piezoresponse force microscopy (PFM), which since its inception has become a method of choice in both academic and industrial groups for the investigation of the nanoscale properties of ferroelectric materials and structures. Other major scientific accomplishments include the manipulation of ferroelectric domains at the nanoscale, the development of an approach for fast switching dynamics in ferroelectric capacitors, the demonstration of the tunneling electroresistance effect in ferroelectrics and nanoscale studies of electromechanical behavior of biological systems.
His current research topics include the emergence of the ferroelectric ordering in 2D electronic materials and the exploration of the physical mechanism of their polarization-coupled transport properties.
Gruverman plans to spend this first stay associated with the Humboldt Research Award in Germany at the HZB in Berlin and NamLab in Dresden.
- Bright prospects for tin perovskite solar cellsPerovskite solar cells are widely regarded as the next generation photovoltaic technology. However, they are not yet stable enough in the long term for widespread commercial use. One reason for this is migrating ions, which cause degradation of the semiconducting material over time. A team from HZB and the University of Potsdam has now investigated the ion density in four different, widely used perovskite compounds and discovered significant differences. Tin perovskite semiconductors produced with an alternative solvent had a particular low ion density — only one tenth that of lead perovskite semiconductors. This suggests that tin-based perovskites could be used to make solar cells that are not only really environmentally friendly but also very stable.
- Synchrotron radiation sources: toolboxes for quantum technologiesSynchrotron radiation sources generate highly brilliant light pulses, ranging from infrared to hard X-rays, which can be used to gain deep insights into complex materials. An international team has now published an overview on synchrotron methods for the further development of quantum materials and technologies in the journal Advanced Functional Materials: Using concrete examples, they show how these unique tools can help to unlock the potential of quantum technologies such as quantum computing, overcome production barriers and pave the way for future breakthroughs.
- How carbonates influence CO2-to-fuel conversionResearchers from the Helmholtz Zentrum Berlin (HZB) and the Fritz Haber Institute of the Max Planck Society (FHI) have uncovered how carbonate molecules affect the conversion of CO2 into valuable fuels on gold electrocatalysts. Their findings reveal key molecular mechanisms in CO2 electrocatalysis and hydrogen evolution, pointing to new strategies for improving energy efficiency and reaction selectivity.