Published on Fri, 04 Dec 2020 in PRESS RELEASES
The advantageous properties of metal halide perovskites include their high light-harvesting capacity and their remarkable ability to efficiently convert solar energy into electrical energy. Another special feature of these materials is that both charge carriers and ions are mobile within them. While charge carrier transport is a fundamental process required for the photovoltaic operation of the solar cell, ionic defects and ion transport often have undesirable consequences on the performance of these devices. Despite significant progress in this field of research, many questions regarding the physics of ions in perovskite materials remain open.
On the way to a better understanding of these structures, the Technical Universities of Chemnitz and Dresden have now taken a big step forward. In a joint investigation by the research groups around Prof. Dr. Yana Vaynzof (Chair of Emerging Electronic Technologies at the Institute of Applied Physics and Center for Advancing Electronics Dresden – cfaed, TU Dresden) and Prof. Dr. Carsten Deibel (Optics and Photonics of Condensed Matter, Chemnitz University of Technology) under the leadership of Chemnitz University of Technology, the two teams uncovered the ionic defect landscape in metal halide perovskites. They were able to identify essential properties of the ions that make up these materials. The migration of the ions leads to the presence of defects in the material, which have a negative effect on the efficiency and stability of perovskite solar cells. The working groups found that the motion of all observed ions, despite their different properties (such as positive or negative charge), follows a common transport mechanism and also allows the assignment of defects and ions. This is known as the Meyer-Neldel rule. The results were published in the renowned journal "Nature Communications" (11, 6098 (2020)) (https://www.nature.com/articles/s41467-020-19769-8).
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Joint research work between Chemnitz University of Technology and Technische Universität Dresden under Chemnitz leadership reveals ionic defect landscape in metal halide perovskites - publication in renowned journal Nature Communications
The group of so-called metal halide perovskites as materials has revolutionized the field of photovoltaics in recent years. Generally speaking, metal halide perovskites are crystalline materials that follow the structure ABX3, with varying composition. Here, A, B, and X can represent a combination of different organic and inorganic ions. These materials have a number of properties that are ideal for use in solar cells and could help to make optoelectronic devices such as lasers, light-emitting diodes (LEDs), or photodetectors much more efficient. With regard to the development of a resource- and energy-efficient technology, the relevance of research on these materials is very high.
Published on Wed, 25 Nov 2020 in NEWS
"The project is an important step for the further development of our university. Prof. Feng's research group on Molecular Functional Materials and Prof. Ruck's group from the Cluster of Excellence ct.qmat will find optimal conditions for their excellent work here", explains the Rector of TU Dresden, Prof. Ursula M. Staudinger. "The fact that they are moving into a new home together also offers opportunities for even stronger interdisciplinary cooperation in the future," she adds.
The TU Dresden has started construction work for a new office and laboratory building on Stadtgutstraße, close to the campus. For the first time, the university is also taking over the construction management under its own direction. By August next year, 1,200 square meters of office and lab space will be built. The Chair for Molecular Functional Materials, which is integrated in the Center for Advancing Electronics Dresden (cfaed), as well as the Cluster of Excellence Complexity and Topology in Quantum Matter (ct.qmat) will move in.
Published on Wed, 25 Nov 2020 in PRESS RELEASES
Sponges are some of the oldest animals on Earth. They live in a wide range of waters, from lakes to deep oceans. Remarkably, the skeleton of some sponges is built out of a network of highly symmetrical glass structures. These glass scaffolds have intrigued researchers for a long time. How do sponges manipulate disordered glass into the skeletal elements which are so regular? Researchers from B CUBE – Center for Molecular Bioengineering at TU Dresden together with the teams from the Center for Advancing Electronics Dresden (cfaed) / Dresden Center for Nanoanalysis (DCN) and the Swiss Light Source at the Paul Scherrer Institute in Switzerland are the first to determine the three dimensional (3D) structure of a protein responsible for glass formation in sponges. They explain how the earliest and, in fact, the only known natural protein-mineral crystal is formed. The results were published in the journal “PNAS.”
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Published on Wed, 18 Nov 2020 in NEWS
Wie gelingt eigentlich Studienorientierung in Zeiten von Corona? Virtuell, interaktiv und perspektivenreich! Das zeigt eine vierteilige Veranstaltungsreihe zur Organischen Elektronik, die seit dem 12.11. immer donnerstags deutschlandweit interessierten Schüler*innen von MINT-EC-Schulen Einblicke in aktuelle Forschung sowie persönliche Motivationen und Karrierewege von Wissenschaftler*innen und Studierenden gibt. Über ein Online-Konferenztool können sich bis zu 50 Teilnehmer*innen direkt in die Labore verbinden und quasi live Forschungsatmosphäre aufnehmen und alle ihre Fragen loswerden. Organisiert von der Schulkontaktstelle der TU Dresden und inhaltlich bespielt von Wissenschaftler*innen des cfaed widmen sich die Beiträge den Visionen, Phänomenen und Herausforderungen der Organischen Elektronik und zeigen eindrucksvoll auf, welches fruchtbare, vielfältige Umfeld Dresden den Schüler*innen zu bieten hat.MINT-EC steht für ein Netzwerk exzellenter MINT-Schulen, die ein starkes mathematisch-naturwissenschaftliches Profil haben. Die TU Dresden ist Mitglied in diesem Netzwerk.Interessierte können sich per E-Mail unter mint-ec@tu-dresden.de anmelden.
Published on Sat, 14 Nov 2020 in NEWS
With an innovative concept for international, strategically-oriented excellence scouting, TU Dresden has now been accepted in the Alexander von Humboldt Foundation's new Henriette Herz Scouting Program. The "SCAFFOLDING" pilot project supports the "Friedrich List” Faculty of Transport and Traffic Sciences in attracting and recruiting highly qualified, international, early-career researchers. It is carried out in cooperation with the Chair of Network Dynamics at the Center for Advancing Electronics Dresden (cfaed) and is endowed with a total of 125,000 EUR. The two-year project will start in January 2021 and will be jointly led by Prof. Regine Gerike from the Faculty of Transport and Traffic Sciences and Prof. Marc Timme (cfaed and Institute for Theoretical Physics).
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