[Seminar] Synthesis of CH3NH3SnI3 Synthesis of CH3NH3SnI3 perovskite films by reaction of Sn metallic film with CH3NH3I vapor" and a method to assess the "Degradation kinetics of Perovskite solar cells exposed to H2O or O2
1991/11: PhD, Material Science (Bordeaux Uni.+ CNRS, France) .
1992/1~5: Thomson LCC company, R&D department (France).
1992/7~present: AIST (post-doc permanent staff)
2010-2011: Dispatched to AIST International Office (in charge of collaborations, MOU, etc.).
1992~2013: Carbon materials (Fullerene, nanotube, graphene) for optoelectronics / photovoltaics
2013~ present: Perovskite Solar cells (involved in CEREBA consortium, 2 NEDO projects)
Part 1: Sn-based perovskite solar cells (PSCs) are of great interest to overcome the toxicity issue posed by Pb-based perovskite. For instance, CH3NH3SnI3 (MASnI3) are often synthesized by the reaction of SnI2 and CH3NH3I (MAI) dissolved in organic solutions with various additives to prevent the oxidation of Sn2+ into Sn4+, which are known to hamper the performance of the solar cells. Here, I will present a new technique to synthesize CH3NH3SnI3 from thin layers of metallic Sn exposed to MAI vapor, based on our previous experience on the synthesis of CH3NH3PbI3 (MAPbI3) by reaction of Pb thin film in presence of CH3NH3I+I2.
Prof. Yabing Qi, Energy Materials and Surface Sciences Unit (Qi unit)
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