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Controlled Synthesis and Processing of Perovskite Films for High-Efficiency Organometal Halide Perovskite Photovoltaics

 

  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20160921日(星期三)上午10:0011:00    

  报告地点:能源楼217会议室

   

  报告人简介   

  Education

  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    

  Professional Experience

  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,

  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

  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

   

  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 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.