Key parameters of two typical intercalation reactions to prepare hybrid inorganic–organic perovskite films
Shi Biao1, 2, 3, 4, Guo Sheng1, 2, 3, 4, Wei Changchun1, 2, 3, 4, Li Baozhang1, 2, 3, 4, Ding Yi1, 2, 3, 4, Li Yuelong1, 2, 3, 4, Wan Qing5, Zhao Ying1, 2, 3, 4, Zhang Xiaodan1, 2, 3, 4, †
       

(color online) Relationship between the PbI2 thickness and MAI/IPA concentration to achieve the highest PSC efficiency. The thickness of the PbI2 film has a linear correlation with the MAI/IPA concentration to achieve the optimum perovskite film.