报告题目：Hybrid Perovskite Optoelectronics

报 告 人：Prof. Tom Wu, King Abdullah University of Science and Technology, Saudi Arabia

时    间：2016年8月4日（星期四），下午2:30

地    点：南楼2层会议室

邀请人：刘新风 研究员（Tel：82545778）

摘要：

Rediscovery of hybrid perovskites, such as CH₃NH₃PbX₃, where X is Cl, Br or I, in high-performance photovoltaic research has aroused lots of interest from the materials science community. Their exceptional properties, such as low-cost solution processing, tunable direct bandgap, high light absorption and long carrier diffusion length, might lead to paradigm-shifting technologies in the near future [1]. I will discuss the perspective of applying hybrid perovskites in photovoltaic and optoelectronic devices, with a focus on photodetectors and phototransistors. Our experiments on perovskite phototransistors provided direct evidence on the ambipolar transport in perovskite films with balanced electron and hole mobilities [2]. As an approach towards high-mobility devices, we found that carbon nanotubes embedded in perovskite films can serve as one-dimensional transport channels and significantly enhance the charge mobility to a level comparable to common semiconductors such as crystalline silicon. Furthermore, two-dimensional metal dichalcogenides were used to boost the performance of perovskite-based photodetectors [3]. Finally, I will discuss the application of perovskite microcrystal films as photodetectors that operate efficiently in both broadband and narrowband regimes [4].

[1] M. I. Saidaminov, et al., Nature Communications, 6, 7586 (2015).

[2] F. Li, C. Ma, H. Wang, W. Hu, W. Yu, A. D. Sheikh, T. Wu, Nature Communications, 6, 8238 (2015).

[3] Chun Ma, et al., Advanced Materials 28, 3683 (2016).

[4] M. I. Saidaminov, et al., Advanced Materials DOI: 10.1002/adma.201601235 (2016).

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 more than 200 peer-reviewed papers in the areas of oxide thin films, nanomaterials, and hybrid perovskites, with a focus on their electronic, magnetic and optical functionalities. His group has witnessed tthe career development of 14 PhD students and 25 postdocs. He also serves as Associate Editor for ACS Applied Materials & Interfaces.

Group website: http://nanooxides.kaust.edu.sa