文献类型：期刊文献

英文题名：Photomechanically accelerated degradation of perovskite solar cells

作者：Wang, Haonan[1];Li, Qing[1];Zhu, Yan[1];Sui, Xinyuan[1];Fan, Xiulian[3];Lin, Miaoyu[1];Shi, Yifeng[4];Zheng, Yichu[5];Yuan, Haiyang[1];Zhou, Yu[3];Jin, Haibao[2];Yang, Hua Gui[1];Hou, Yu[1];Yang, Shuang[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[3]Cent South Univ, Sch Phys, Hunan Key Lab Nanophoton & Devices, Changsha 410083, Hunan, Peoples R China;[4]Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab Mat High Power Laser, Shanghai 201800, Peoples R China;[5]Shanghai Univ, Sch Mechatron Engn & Automat, Shanghai 200444, Peoples R China

年份：2025

卷号：18

期号：5

起止页码：2254

外文期刊名：ENERGY & ENVIRONMENTAL SCIENCE

收录：;EI(收录号：20250417759805);WOS:【SCI-EXPANDED(收录号:WOS:001399284100001)】；

基金：This work was financially supported by National Natural Science Foundation of China (22379044, 52203330, 12304109, 52373114), National Ten Thousand Talent Program for Young Top-notch Talent, the Science and Technology Commission of Shanghai Municipality (21DZ1207101, 23520710700), the Key Program of the National Natural Science Foundation of China (22239001), Shanghai Pilot Program for Basic Research (22TQ1400100-5), "Dawn" Program of Shanghai Education Commission (22SG28), Shanghai Municipal Natural Science Foundation (22ZR1418000), Shanghai Sailing Program (22YF1410000, 22YF1413100), the Fundamental Research Funds for the Central Universities (JKD01241607, JKVD1241041), Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400), Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism (Shanghai Municipal Education Commission).

语种：英文

外文关键词：Fracture mechanics - Layered semiconductors - Metal halides - Perovskite - Photodegradation

摘要：Understanding the origin of intrinsic instability of metal halide perovskites is indispensable for their advancement in opto-electronic applications. Here, we report a photomechanically accelerated degradation mechanism of perovskite thin films, in which the lattice expansion driven by light illumination has been found to govern the degradation kinetics. The dynamic lattice evolution under illumination causes crowding of the perovskite grains, leading to large local strains near the grain boundaries (GBs), which thereby facilitates defect formation and iodine component loss in the region. We show that the physical separation of each perovskite grain using trans-polyisoprene (TPI) could circumvent photomechanical damage at the GBs, achieving a T97 of 1000 h under continuous one-sun illumination at 55 degrees C in solar cell devices. Our results emphasize the nontrivial role of dynamic lattice deformation in the decomposition of perovskite thin films and open up new possibilities to further improve the intrinsic stability of solar cells.