Xiaoxue Ren, Jifei Wang, Yun Lin, Yingwei Wang, Haipeng Xie, Han Huang, Bin Yang, Yanfa Yan, Yongli Gao, Jun He, Jinsong Huang, Yongbo Yuan
For halide perovskites that are susceptible to photolysis and ion migration, iodide-related defects, such as iodine (I2 ) and iodine vacancies, are inevitable. Even a small number of these defects can trigger self-accelerating chemical reactions, posing serious challenges to the durability of perovskite solar cells. Fortunately, before I2 can damage the perovskites under illumination, they generally diffuse over a long distance. Therefore, detrimental I2 can be captured by interfacial materials with strong iodide/polyiodide (Ix - ) affinities, such as fullerenes and perfluorodecyl iodide...
April 29, 2024: Nature Materials