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Understanding and controlling defect generation and movement in organic‐inorganic lead halide perovskite materials will not only lead to more stable devices but also new device concepts. In article number 1700527, Wei D. Lu and co‐workers reveal the formation, migration and annihilation of iodine vacancies in CH3NH3PbI3 films under an electric field and/or light illumination. An electric‐write and...
Organic–inorganic halide perovskite (OHP) materials, for example, CH3NH3PbI3 (MAPbI3), have attracted significant interest for applications such as solar cells, photodectors, light‐emitting diodes, and lasers. Previous studies have shown that charged defects can migrate in perovskites under an electric field and/or light illumination, potentially preventing these devices from practical applications...
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