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　　

　　报告时间：2016年09月21日（星期三）上午10:00－11:00　　

　　报告地点：能源楼217会议室

　　

　　报告人简介：　　

　　Education

　　East China Institute of Technology, ChinaChemistryB.A., 1998

　　Institute of Metal Research, Chinese Acad. of Sci., ChinaMaterial Science & Engr. M. S., 2001

　　Institute of Chemistry, Chinese Acad. of Sci., ChinaPhysical ChemistryPh. D., 2004　　

　　Professional Experience

　　2008–pResearch Staff Member, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory (ORNL)

　　2011–pJoint faculty, Bredesen Center and Department of Electrical Engineering and Computer Sciences, University of Tennessee, Knoxville (UTK)

　　2004–2008Postdoctoral Research Associate, Center for Nanophase Materials Sciences,

　　ORNL

　　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

　　2007The National Top 100 Excellent Ph. D. Thesis Award in China, Ministry of Education

　　2006The Top 50 Excellent Ph. D. Thesis Award ofthe Chinese Academy of Sciences

　　2004Outstanding Thesis Award of the 24^thAnnual Meeting,Chinese Chemical Society

　　

　　报告摘要：

　　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 CH₃NH₃PbI₃perovskite 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.