Webinar title: Low-Dimensional Perovskite Nanocrystals for Photoelectronic Applications
Speaker: Weiwei Zheng
Webinar time: December 27, 2023 (Wednesday) 15:30
Venue: Room 200, New Environmental Building; Tencent Meeting 283197435, Password 231227
Inviter: Chen Yuetan, Zhao Yixin
Abstract:
Metal halide perovskite nanocrystals (NCs) with excellent photoelectrical properties are one of the most interesting materials capturing the interest of researchers over the past decade, and have broad applications in optoelectronics, such as light-emitting diodes (LEDs), photodetectors, and solar cells.
In our research, we developed advanced synthetic methods for low-dimensional perovskite and metal chalcogenide NCs, including 0-dimensional (0D) nanocubes and quantum dots, 1D nanorods and nanowires, 2D nanoplatelets and nanofilms, as well as multi-dimensional core/shell heterostructure NCs. To overcome the glaring limitation of instability and toxicity of lead-based metal halide perovskites, we have developed shell coating strategies, including non-epitaxial oxide shell encapsulation and epitaxial perovskite shell growth, for metal halide perovskite NCs. The resulting core/shell perovskite NCs present excellent environmental stability and tunable charge separation efficiency with promising application for solar energy conversion such as photocatalysis in aqueous solution.
About the speaker:
Dr. Weiwei Zheng is an Associate Professor in the Department of Chemistry at Syracuse University. He received his doctorate degree in Inorganic Chemistry from the Florida State University in 2011. His graduate work focused on developing a fundamental understanding of the magnetic properties of transition metal ion-doped semiconductor quantum dots. In 2012, he joined the Emory University as a postdoctoral fellow to work on the properties of hybrid organic/inorganic interfaces and biological applications of semiconductor nanocrystals. Dr. Zheng began his current appointment at Syracuse University in 2015.
Dr. Zheng research interests include the design and synthesis of novel functional inorganic nanomaterials for emerging applications in renewable energy and photocatalysis. He is particularly interested in the optical, electronic, and magnetic properties of transition metal ion doped nanomaterials, selective surface functionalization of nanoparticles, hybrid nanocomposites, and the material assembly for advanced shaped nanocrystals. He has received a couple of awards, including NSF CAREER Award (2020), ACS-PRF New Investigator Award (2018), Syracuse Center of Excellence (CoE) in Environmental Energy Systems Faculty Fellow (2023), etc., from his research at Syracuse University.