作者：Ferrari, Matthew J.; Moss, William J.
作者单位：Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; Johns Hopkins University
作者：Tsiroukis, Fotis
作者单位：Technical University of Munich
作者：Raff-Heinen, Stefan; Murray, Fiona E.
作者单位：Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT)
作者：Cloete, Karen Jacqueline
作者单位：University of South Africa
作者：Osman, Safaa Osman Abuzaid
作者单位：Universiti Teknologi Malaysia
作者：Zheng, Likai; Wei, Mingyang; Eickemeyer, Felix T.; Gao, Jing; Huang, Bin; Gunes, Ummugulsum; Schouwink, Pascal; Bi, David Wenhua; Carnevali, Virginia; Mensi, Mounir; Biasoni, Francesco; Zhang, Yuxuan; Agosta, Lorenzo; Slama, Vladislav; Lempesis, Nikolaos; Hope, Michael A.; Zakeeruddin, Shaik M.; Emsley, Lyndon; Rothlisberger, Ursula; Pfeifer, Lukas; Xuan, Yimin; Graetzel, Michael
作者单位：Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; National University of Singapore; Nanjing University of Aeronautics & Astronautics; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Swiss Federal Institutes of Technology Domain; Ecole Polytechnique Federale de Lausanne; Polytechnic University of Milan
摘要：A-site cation mixing can enhance the photovoltaic performance of a wide-bandgap (WBG) perovskite, but rubidium (Rb) cation mixing generally forms a nonperovskite phase. We report that lattice strain locks Rb ions into the alpha-phase of the lattice of a triple-halide WBG perovskite, preventing phase segregation into a nonperovskite Rb-cesium-rich phase. This process cooperates with chloride accommodation and promotes halide homogenization across the entire film volume. The resulting 1.67-elect...
