1. Stabilizing black-phase formamidinium perovskite formation at room temperature and high humidity
- Author
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Lingfeng Chao, Deli Li, Jing Zhang, Ping Li, Wei Huang, Bin Du, Zhenhuang Su, Qi Wei, Lei Tao, Zhongbin Wu, Yue Wang, Guichuan Xing, Xueqin Ran, Bixin Li, Xingyu Gao, Wei Hui, Yingdong Xia, Lin Song, Yonghua Chen, Fei Xia, Wei Shi, Shouwei Zuo, Tingting Niu, Hui Zhang, Chenxin Ran, He Dong, and Hui Lu
- Subjects
chemistry.chemical_classification ,Multidisciplinary ,Materials science ,Iodide ,Humidity ,law.invention ,chemistry.chemical_compound ,Formamidinium ,chemistry ,Chemical engineering ,law ,Phase (matter) ,Ionic liquid ,Solar cell ,Thin film ,Perovskite (structure) - Abstract
Perovskite synthesis out in the open Although methods have been developed that create the photoactive black perovskite phase of formamidinium lead iodide (α-FAPbI 3 ), these routes are temperature and humidity sensitive and less compatible with large-scale solar cell production. Hui et al. report an alternative route in which vertically aligned lead iodide thin films are grown from the ionic liquid methylamine formate. Nanoscale channels in the films lower the barrier to permeation of formamidinium iodide and enable transformation to α-FAPbI 3 , even at high humidity and room temperature. Solar cells made with these films have power conversion efficiencies as high as 24.1% that display high stability. Science , this issue p. 1359
- Published
- 2021
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