Inactive (PbI <sub>2</sub> ) <sub>2</sub> RbCl stabilizes perovskite films for efficient solar cells
Yang ZhaoCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, P.R. China, 100049Fei MaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, P.R. China, 100049Zihan QuCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, P.R. China, 100049Shiqi YuCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, P.R. China, 100049Tao ShenCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, P.R. China, 100049Hui‐Xiong DengCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, P.R. China, 100049Xinbo ChuCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, P.R. China, 100049Xinxin PengHunan Key Laboratory of Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha, Hunan, P.R. China, 410083Yongbo YuanHunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha, Hunan, P.R. China, 410083Xingwang ZhangCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, P.R. China, 100049Jingbi YouCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, P.R. China, 100049
2022en
ABI
Аннотация
In halide perovskite solar cells the formation of secondary-phase excess lead iodide (PbI 2 ) has some positive effects on power conversion efficiency (PCE) but can be detrimental to device stability and lead to large hysteresis effects in voltage sweeps. We converted PbI 2 into an inactive (PbI 2 ) 2 RbCl compound by RbCl doping, which effectively stabilizes the perovskite phase. We obtained a certified PCE of 25.6% for FAPbI 3 (FA, formamidinium) perovskite solar cells on the basis of this strategy. Devices retained 96% of their original PCE values after 1000 hours of shelf storage and 80% after 500 hours of thermal stability testing at 85°C.
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