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Materials Frontier No.179
Title：Degradation of MAPbI3 Perovskite
Speaker：Prof.Yabing Qi, Energy Materials and Surface Sciences Unit (EMSS), Okinawa Institute of Science and Technology Graduate University (OIST), Japan
Venue：Room 313, Materials Building A
Prof. Yabing Qi is Unit Head of Energy Materials and Surface Sciences Unit at Okinawa Institute of Science and Technology Graduate University. Prior to his current appointment, Prof. Qi was a postdoctoral fellow at Princeton University. He received his B.S., M.Phil., and Ph.D. from Nanjing University, Hong Kong University of Science and Technology, and University of California Berkeley, respectively. His research interests include perovskite solar cells, organic electronics, surface sciences, advanced material characterization, energy materials and devices. Prof. Qi has published ~70 peer-refereed papers and is the inventor for 11 patents/patent applications. He has delivered 50+ keynote and invited research presentations
at international conferences, technical meetings and universities. As the symposium chair, Prof. Qi organized International Symposium on Organic Electronics (Okinawa, Japan; October 3-5, 2012) and International Symposium on Functional Materials (Okinawa, Japan; January 25-29, 2016). In the 2015 MRS Fall Meeting, Prof. Qi co-organized Symposium AA: Organic Semiconductors—Surface, Interface and Bulk Doping. In the 2016 MRS Fall Meeting, Prof. Qi co-organized Symposium ES3: Perovskite Solar Cell Research from Material Properties to Photovoltaic Function. In the coming 2017 MRS Spring and Fall Meetings, as the lead organizer Prof. Qi will organize symposia on Perovskite Solar Cells.
In recent years, organometal halide perovskite solar cells have been attracting enormous attention from academia as well as industry. Despite the outstanding efficiencies that perovskite solar cells have achieved, stability issues of these cells remain as a key challenge. My group at OIST has been making concerted efforts to investigate degradation mechanisms of perovskite materials and devices and to develop innovative strategies to improve their performance. In this talk, I will introduce our studies on thermal degradation  and I2 induced degradation  of MAPbI3 perovskite.
 E. J. Juarez-Perez, Z. Hawash, S. R. Raga, L. K. Ono, Y. B. Qi*, Energy Environ. Sci. 9, 3406 (2016).
 S. Wang, Y. Jiang, E. J. Juarez-Perez, L. K. Ono, Y. B. Qi*, Nature Energy 2, 16195 (2016).