Defect Passivation Refinement in Perovskite Photovoltaics: Achieving Efficiency over 45% under Low‐Light and Low‐Temperature Dual Extreme Conditions

• DOI: 10.1002/adma.202312014
• Publication Date: 2024-02-21T10:47:04Z
• Authors: Yajie Wang; Tinghuan Yang; Weilun Cai; Peng Mao; Yang Yang; Nan Wu; Chou Liu; Shiqiang Wang; Yachao Du; Wenliang Huang; Guangtao Zhao; Zicheng Ding; Ningyi Yuan; Jianning Ding; Yufei Zhong; Shengzhong (Frank...; Kui Zhao
• Keywords: Passivation

Perovskite photovoltaics have emerged as the most promising candidates for next-generation light-to-electricity technology. However, their practical application still suffers from energy loss induced by intrinsic defects within perovskite lattice. Here, a refined defect passivation in films is designed, which shows multi-interaction mechanism between and passivator. Interestingly, shift of molecular bonding observed upon cooling down film, leading to stronger iodine/formamidine vacancies. Such on device under low-light low-temperature conditions further leveraged record efficiency over 45% with durable ambient stability (T