Cation reactivity inhibits perovskite degradation in efficient and stable solar modules

• 成果类型: Article
• 署名作者: Ding, Yong; Ding, Bin; Shi, Pengju; Romano-deGea, Jan; Li, Yahui; Turnell-Ritson, Roland C.; Syzgantseva, Olga A.; Yavuz, Ilhan; Xia, Ming; Yu, Ruohan; Syzgantseva, Maria A.; Audinot, Jean-Nicolas; Miao, Xiaohe; Liao, Xiaobin; Li, Jiantao; Doerflinger, Patrick; Dyakonov, Vladimir; Liu, Cheng; Yang, Yi; Tao, Li; Brooks, Keith G.; Slonopas, Andre; Pan, Jiahong; Zhang, Lei; An, Qinyou; Rong, Yaoguang; Peng, Jun; Ding, Liming; Shi, Enzheng; Mai, Liqiang; Dai, Songyuan; Zhao, Kangning; Sheng, Jiang; Wang, Rui; Dyson, Paul J.; Nazeeruddin, Mohammad Khaja
• 署名单位: North China Electric Power University; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Soochow University - China; Westlake University; Lomonosov Moscow State University; Marmara University; Wuhan University of Technology; Mendeleev University of Chemical Technology of Russia; Luxembourg Institute of Science & Technology; United States Department of Energy (DOE); Argonne National Laboratory; University of Wurzburg; Hubei University; Johns Hopkins University; Guangxi University; Chinese Academy of Sciences; National Center for Nanoscience & Technology, CAS; Changzhou Institute of Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-9948
• DOI: 10.1126/science.ado6619
• 发表日期: 2024-11-01
• 页码: 531-538
• 关键词: cells; films

摘要

Perovskite solar modules (PSMs) show outstanding power conversion efficiencies (PCEs), but long-term operational stability remains problematic. We show that incorporating N,N-dimethylmethyleneiminium chloride into the perovskite precursor solution formed dimethylammonium cation and that previously unobserved methyl tetrahydrotriazinium ([MTTZ](+)) cation effectively improved perovskite film. The in situ formation of [MTTZ](+) cation increased the formation energy of iodine vacancies and enhanced the migration energy barrier of iodide and cesium ions, which suppressed nonradiative recombination, thermal decomposition, and phase segregation processes. The optimized PSMs achieved a record (certified) PCE of 23.2% with an aperture area of 27.2 cm(2), with a stabilized PCE of 23.0%. The encapsulated PSM retained 87.0% of its initial PCE after similar to 1900 hours of maximum power point tracking at 85 degrees C and 85% relative humidity under 1.0-sun illumination.