报告题目：Controlled synthesis and processing of perovskite films for high-efficiency Organometal Halide Perovskite Photovoltaics
报告人：Dr. Kai Xiao
工作单位：Oak Ridge National Laboratory, USA
East China Institute of Technology, China Chemistry B.A., 1998
Institute of Metal Research, Chinese Acad. of Sci., China Material Science & Engr. M. S., 2001
Institute of Chemistry, Chinese Acad. of Sci., China Physical Chemistry Ph. D., 2004
2008–p Research Staff Member, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory (ORNL)
2011–p Joint faculty, Bredesen Center and Department of Electrical Engineering and Computer Sciences, University of Tennessee, Knoxville (UTK)
2004–2008 Postdoctoral Research Associate, Center for Nanophase Materials Sciences,
Professional and Synergistic Activities
Proposal Reviewer: NSF Reviewer Panel on Organic Electronics, DOE-BES proposal reviewer, User proposal reviewer for the Molecular Foundry at Laurence Berkeley National laboratoryand Stanford Synchrotron Radiation Lightsource (SSRL).
Editorial Board: Scientific Report; AIMS Materials Science
Journal Reviewer: Nature Nanotechnology; Nature Comm.; Light: Science & Applications; NPG Asia Materials; Scientific Report; J. Am. Chem. Soc.; Nano Letters, J. Phys. Chem. B; Chem. Mater.; ACS Nano; Langmuir; Angew. Chem. Int. Ed.; Adv. Mater.; Adv. Func. Mater.; Adv. Energy Mater.; Small; ChemSusChem; PCCP; Chem. Eur. J; Appl. Phys. Lett.; Nanoscale; J. Mater. Chem.; Polymer Chemistry; Polymer Reviews; J. Appl. Polymer Sci.; Two-Dimensional Materials.
Honors and Awards
2007 The National Top 100 Excellent Ph. D. Thesis Award in China, Ministry of Education
2006 The Top 50 Excellent Ph. D. Thesis Award of the Chinese Academy of Sciences
2004 Outstanding Thesis Award of the 24th Annual Meeting, Chinese Chemical Society
Organometallic halide perovskites hold great promise for next-generation, low-cost optoelectronic devices. Here, we developed a simple and effective room-temperature layer-by-layer solution processing approach to fabricate CH3NH3PbI3 perovskite photovoltaics with high efficiencies exceeding 16%. Electron beam induced current (EBIC) microscopy and time-resolved photoluminescence spectroscopy were used to understand how material crystallinity and grain boundaries affect charge carrier dynamics and device performance in high-efficiency CH3NH3PbI3-based perovskite photovoltaics. In addition, in-situ X-ray diffraction combined with TOT-SIMS chemical imaging were used to explore the growth kinetics of hybrid perovskite film and the distribution of Cl- in the mixed halides of perovskite. Our results provide fundamental insight and guidance toward the engineering of high-quality perovskite films for superior-performance and cost-effective optoelectronic devices.