Hybrid organic-inorganic metal halide perovskites have recently emerged as exciting new light-harvesting and charge-transporting materials for efficient photovoltaic and optoelectronic devices. This Symposium focuses on a discussion of fundamental optoelectronic properties that underpin the extraordinary properties of these materials.
The design of new materials requires a clear understanding of links between structural (lattice) effects and electronic properties, which give rise to intriguing effects in these perovskites. Optimized charge extraction and injection require an evaluation of charge-carrier dynamics, mobilities and excitonic effects. In addition, charge-carrier trapping, current-voltage hysteresis and photoinduced halide segregation are linked with lattice defects and ionic motion through the perovskite under the influence of electric fields and photon absorption.
This Symposium will allow for stimulating discussion of such effects, aiding the advancement of hybrid perovskite devices through improved understanding of the fundamental processes governing these materials.
- Theoretical modeling and computational simulation
- Origin and nature of defect states
Laura Herz is a Professor of Physics at the University of Oxford. She received her PhD in Physics from the University of Cambridge in 2002 and was a Research Fellow at St John's College Cambridge from 2001 - 2003 after which she moved to Oxford. Her research interests lie in the area of organic and organic/inorganic hybrid semiconductors including aspects such as self-assembly, nano-scale effects, energy-transfer and light-harvesting for solar energy conversion.
Dr. Tze-Chien Sum is an Associate Professor at the Division of Physics and Applied Physics, School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University (NTU) where he leads the Femtosecond Dynamics Laboratory. He is presently the Associate Dean (Research) at the College of Science. Tze-Chien received his Ph.D. in Physics from the National University of Singapore (NUS) in 2005, for the work in proton beam writing and ion-beam spectroscopy. His present research focuses on investigating light matter interactions; energy and charge transfer mechanisms; and probing carrier and quasi-particle dynamics in a broad range of emergent nanoscale and light harvesting systems. Tze-Chien received a total of 11 teaching awards from NUS and NTU, including the coveted Nanyang Award for Excellence in Teaching in 2006 and the 2010 SPMS Teaching Excellence Honour Roll Award. Most recently, he received the 2013 SPMS Young Researcher Award; the Institute of Physics Singapore 2014 World Scientific Medal and Prize for Outstanding Physics Research; the 2014 Nanyang Award for Research Excellence (Team); and the 2015 Chemical Society of Japan Asian International Symposium Distinguished Lectureship Award. More information can be found at http://www.ntu.edu.sg/home/tzechien/spms/index.html
Born in the Netherlands,David Cahen studied chemistry & physics at the Hebrew Univ. of Jerusalem (HUJ), Materials Research and Phys. Chem. at Northwestern Univ, and biophysics of photosynthesis (postdoc) at HUJ and the Weizmann Institute of Science, WIS. After joining the WIS faculty he focused on alternative sustainable energy resources, in particular various types of solar cells. In parallel he researches hybrid molecular/non-molecular systems, focusing on understanding and controlling electronic transport across (bio)molecules. He is a fellow of the AVS and the MRS. He heads WIS' Alternative, sustainable energy research initiative.
Filippo De Angelis is senior research scientist and a deputy director at the CNR Institute of Molecular Sciences and Technology, in Perugia, Italy. He is the founder and leader of the Computational Laboratory for Hybrid/Organic Photovoltaics. He earned a BS in Chemistry in 1996 and a PhD in Theoretical Inorganic Chemistry in 1999, both from the University of Perugia. He is an expert in the development and application of quantum mechanical methods to the study of hybrid/organic photovoltaics and materials for energy applications. He is Fellow of the European Academy of Sciences. He has published >270 papers with > 17000 citations.
Dr. Guichuan Xing received his bachelor Degree from Fudan University (China) in 2003 and PhD in physics from National University of Singapore (Singapore) in 2011. From 2009 to 2016, he worked as a research fellow in Prof. Tze Chien Sum group at Nanyang Technological University. Dr. Xing joined the Institute of Applied Physics and Materials Engineering (IAPME), University of Macau in 2016 as an assistant Professor. His research interest includes developing and applying ultrafast nonlinear spectroscopic techniques to probing, understanding and controlling the fundamental charge and energy carrier generation, transport and relaxation processes in novel optoelectronic systems for energy conversion/storage and light emission applications.
Selina Olthof studied physics at the University of Stuttgart (Germany) and completed her master's thesis at the Max Planck Institute for Solid State Research. In 2010, she earned her Ph.D. from the University of Dresden under Karl Leo, followed by a two-year postdoctoral stay at Princeton University with Antoine Kahn. From 2012 to 2024, she led the Surface Science Research Group in the Department of Chemistry at the University of Cologne. Recently, she was appointed Full Professor at the University of Wuppertal, where she established the Chair of Material and Surface Analysis. Her research focuses on advancing the understanding of the electronic structure of novel semiconducting materials, particularly organic semiconductors and hybrid perovskites.
Sanford Ruhman is a full professor of Chemistry at the Hebrew University. His work concentrates on applications of femtosecond spectroscopy in condensed phases. As a pioneer in the field of femtosecond photochemistry his group was the first to report conservation of coherence from reactants to dissociation products in solutions, and to utilize impulsive Raman probing of photoproducts. His current interests include fundamental ultrafast excitonics in nanocrystals and photovoltaic materials, ultrafast photobiology, and applications of impulsive vibrational spectroscopy to probe light induced dynamics in liquids and solids. Over the years he has served as the Director of the Farkas Minerva center for light induced processes at the Hebrew University, and as the head of the Institute of Chemistry there.
Koichi Yamashita obtained his PhD from Kyoto University in 1982 supervised by Prof. Kenichi Fukui. He was postdoctoral fellow with Prof. William H. Miller at the University of California, Berkeley for 1982-84. He moved to Okazaki in 1984 to join the group of Prof. Keiji Morokuma as Research Associate at Division of Theoretical Study of Institute of Molecular Science. In 1991 he became Senior Researcher at Institute of Fundamental Chemistry directed by Prof. Kenichi Fukui. In 1994 he moved to Tokyo to join the group of Prof. Kimihiko Hirao as Associate Professor in Department of Applied Chemistry at University of Tokyo. He has been Full Professor at the University of Tokyo since 1997.