# Inactive (PbI 2 ) 2 RbCl stabilizes perovskite films for efficient solar cells

“Inactive (PbI 2 ) 2 RbCl stabilizes perovskite films for efficient solar cells” (2022), by Yang Zhao et al. Engineering research paper. Original abstract below, unchanged. No free PDF was found.

- Authors: Yang Zhao, Fei Ma, Zihan Qu, Shiqi Yu, Tao Shen, Hui‐Xiong Deng, Xinbo Chu, Xinxin Peng, Yongbo Yuan, Xingwang Zhang et al.
- Published: July 28, 2022
- Field: Engineering
- DOI: https://doi.org/10.1126/science.abp8873
- Source: https://doi.org/10.1126/science.abp8873

## Abstract

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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