Seminar & Colloquium
[세미나: 10월 23일(월), 오후 2시] Prof. Andrey L. Rogach, City University of Hong Kong
Title
Perovskite Nanocrystals for Light Emitting Applications
Speaker
Prof. Andrey L. Rogach, Department of Materials Science and Engineering, and Centre for Functional Photonics, City University of Hong Kong
Biography
Andrey L. Rogach is a Yeung Kin Man Chair Professor of Photonics Materials at the Department of Materials Science and Engineering, and the Founding Director of the Centre for Functional Photonics (CFP) at City University of Hong Kong. He received his Ph.D. in Physical Chemistry (1995) from the Belarusian State University in Minsk studying formation and properties of silver nanoparticles in different media. He worked as a postdoc and then as a staff scientist at the Institute of Physical Chemistry of the University of Hamburg, Germany from 1995 to 2002. From 2002–2009 he held a tenured position of a lead staff scientist at the Department of Physics and Centre for NanoScience of the University of Munich, Germany, where he completed his habilitation in Experimental Physics on light emission and harvesting with semiconductor nanocrystals. He joined City University of Hong Kong as a Full Professor in 2009 and has been advanced to Chair Professor in 2012. His research focuses on synthesis, assembly and optical spectroscopy of colloidal semiconductor and metal nanocrystals and their hybrid structures, and their use for energy-related and optoelectronic applications. He authored over 500 scientific publications with an h-index of 137 {Google Scholar} in these fields that have been extensively (over 67,000) cited, which ranked him as Highly Cited Researcher (Clarivate Analytics) – Cross-Field 2018 & 2019 and Material Science 2020-2022.
| Date | Monday, October 23, 2023
| Time | 14:00
| Venue | 33동 222호(DB세미나실)
[Abstract]
Chemically synthesized metal halide perovskite nanocrystals have recently emerged as a new class of efficient light emitting materials which are particularly interesting for development of light-emitting diodes (LEDs). Stability of perovskite-based LEDs is still an issue [1], which can be partially mitigated by proper interface design, such as the use of inter-layer amine terminated carbon dots [2]. As for many other nanocrystals, proper surface passivation is a key to ensure high colloidal stability and processability of perovskites; this can be achieved by employment of multi-amine chelating ligands [3]. The use of the lead-based metal halide perovskites is sometimes considered an issue because of the toxicity concerns related to the lead component. To avoid lead in perovskites, co-doping of cerium and bismuth [4], as well as tellurium and bismuth [5] into lead-free double perovskite Cs2AgInCl6 nanocrystals is a useful strategy resulting in their improved photoluminescence efficiency.
| Host | 이태우 교수(02-880-8021)