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.

Keywords

FormamidiniumPerovskite (structure)HalideIodideEnergy conversion efficiencyThermal stabilityMaterials scienceDopingPhase (matter)HysteresisChemical engineeringChemistryInorganic chemistryOptoelectronicsCrystallographyOrganic chemistry

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Publication Info

Year
2022
Type
article
Volume
377
Issue
6605
Pages
531-534
Citations
1292
Access
Closed

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Cite This

Yang Zhao, Fei Ma, Zihan Qu et al. (2022). Inactive (PbI <sub>2</sub> ) <sub>2</sub> RbCl stabilizes perovskite films for efficient solar cells. Science , 377 (6605) , 531-534. https://doi.org/10.1126/science.abp8873

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DOI
10.1126/science.abp8873