报告题目：Wonders of Perovskites: from Oxides to Hybrids

报告人：吴韬 (博士)

报告时间：2015年7月8日9:30～11:00

报告地点：西校区逸夫楼第四会议室

报告简介：

Discoveries and rediscoveries of “star” materials with exceptional functionalities have been the central theme of materials science and propelled the modern technologies in the past decades. In this talk, I will share our experiences and lessons my group learned while playing the “big game” of perovskite-structured materials including both transition-metal oxides and organic-inorganic halides. Oxides can have rich phase diagrams and exotic physical properties due to the complex interactions between multiple degrees of freedoms (charge, spin, orbital, lattice, and so on). But most of them suffer from structural defects that form deep traps and slow down the carrier transport. I will discuss the advantages and challenges of applying prototypical Mott insulators with strong visible light absorption to photovoltaic devices. Moreover, ionic defects and their drift could be used to store information in nonvolatile resistive switching memories. Another “hotter” frontier is perovskite-structured hybrid metal halides, which can absorb light as a result of their band gap and transport carriers with negligible trapping. However, halides are not as stable as oxides, and I will talk about some available approaches to address this stability problem. Furthermore, using phototransistors, we provide direct evidence on the ambipolar transport of this important class of materials.

报告人简介：

Dr. Tom Wu (吴韬) received his B.S. degree from Zhejiang University in 1995 and Ph.D. degree from the University of Maryland, College Park in 2002. Before joining King Abdullah University of Science and Technology (KAUST) in Feb. 2013 as Associate Professor, he worked in Argonne National Laboratory in Chicago and Nanyang Technological University (NTU) in       Singapore   . Dr. Wu has authored/ co-authored nearly 200 peer-reviewed papers in the broad areas of oxide thin films, heterostructures, nanomaterials, and hybrid materials, with a focus on their electronic, magnetic and optical functionalities. He also serves as Associate Editor for ACS Applied Materials & Interfaces.

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                                           主办单位：科技处 材料学院

  2015-6-29