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Methylammonium-Mediated Evolution of Mixed-Organic-Cation Perovskite Thin Films: A Dynamic Composition-Tuning Process |
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| Authors: | Chongwen Li Dr Yuanyuan Zhou Dr Li Wang Yue Chang Yingxia Zong Dr Lioz Etgar Dr Guanglei Cui Prof Nitin P Padture Dr Shuping Pang |
| Institution: | 1. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 P.R. China
These authors contributed equally to this work.;2. School of Engineering, Brown University, Providence, RI, 02912 USA These authors contributed equally to this work.;3. Qingdao University of Science and Technology, Qingdao, 266042 P.R. China;4. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 P.R. China;5. Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101 P.R. China School of Engineering, Brown University, Providence, RI, 02912 USA Qingdao University of Science and Technology, Qingdao, 266042 P.R. China;6. Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904 Israel;7. School of Engineering, Brown University, Providence, RI, 02912 USA |
| Abstract: | Methylammonium-mediated phase-evolution behavior of FA1−xMAxPbI3 mixed-organic-cation perovskite (MOCP) is studied. It is found that by simply enriching the MOCP precursor solutions with excess methylammonium cations, the MOCPs form via a dynamic composition-tuning process that is key to obtaining MOCP thin films with superior properties. This simple chemical approach addresses several key challenges, such as control over phase purity, uniformity, grain size, composition, etc., associated with the solution-growth of MOCP thin films with targeted compositions. |
| Keywords: | crystal growth hybrid perovskites solar cells thin films |