文献类型：期刊文献

英文题名：What determines the iodine oxidation reaction kinetics in halide perovskite solar cells?

作者：Yang, Rui[1];Liu, Xinyi[1];Zhu, Yan[1];Li, Qing[1];Wang, Peng[1];Zhang, Yangyue[1];Wu, Haotian[1];Peng, Yu[1];Yang, Shuang[1];Hou, Yu[1]

机构：[1]East China Univ Sci & Technol, Shanghai Frontiers Sci Ctr Optogenet Tech Cell Met, Shanghai Engn Res Ctr Hierarch Nanomat,Minist Educ, Sch Mat Sci & Engn,Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2025

卷号：9

期号：20

起止页码：3057

外文期刊名：MATERIALS CHEMISTRY FRONTIERS

收录：;EI(收录号：20254119315282);WOS:【SCI-EXPANDED(收录号:WOS:001571105900001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22379044), Shanghai Pilot Program for Basic Research (22TQ1400100-5), Shanghai Municipal Natural Science Foundation (25ZR1401081), the Fundamental Research Funds for the Central Universities (JKD01251505, JKVD1251041), the Postdoctoral Fellowship Program of CPSF (GZC20250071), Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400), and Shanghai Titan Natural Science Development Foundation and Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism (Shanghai Municipal Education Commission).

语种：英文

外文关键词：Conversion efficiency - Cost effectiveness - Iodine - Oxygen - Perovskite solar cells - Reaction kinetics - Redox reactions - Solar cell efficiency

摘要：Perovskite solar cells (PSCs) have garnered significant attention owing to their solution fabrication, cost-effectiveness, and high power conversion efficiency, yet their practical application has been hindered by instability issues. Under operational conditions, redox reactions have been found to be prevalent in perovskite devices, but the underlying mechanism remains very unclear. Here, we systematically investigated the impact of light irradiation, atmosphere and interfacial structures on the redox kinetics in PSCs. Our results show that oxygen acts as a predominant factor driving device degradation, other than the transport layer or spectral components. Spectroscopic results reveal that the formation of iodine-related defects, e.g., triiodide ion (I3-) and iodine (I2), are dramatically boosted under oxygen-rich conditions, and can be further accelerated by light exposure. These findings provide critical insights into the redox reaction mechanism of perovskite-based materials, and offer a potential direction for enhancing the long-term stability of PSCs.