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- W4210346492 abstract "SnO2 has been studied intensively as an electron transport layer (ETL) for highly efficient metal halide perovskite solar cells. However, SnO2 ETL frequently exhibits defect-related issues associated with the bulk SnO2 and the perovskite/SnO2 interface, and to passivate the defect states potassium ion has been used. In order to investigate the passivation effect of potassium ion, we carried out KCl treatment on the solution-processed SnO2 ETL. It was found that KCl-treatment shifted up conduction band maximum and Fermi energy of SnO2, and reduced the band gap of perovskite absorber by K+ diffusion, which resulted in a better conduction band alignment at perovskite/SnO2. Admittance spectroscopy revealed that diffused K+ ions can passivate defects of the perovskite absorber layer. With the improvement of band alignment and defect passivation via the KCl treatment, the J-V hysteresis was almost eliminated and power conversion efficiency was much enhanced with improved open-circuit voltage and fill factor." @default.
- W4210346492 created "2022-02-08" @default.
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- W4210346492 date "2022-02-01" @default.
- W4210346492 modified "2023-10-18" @default.
- W4210346492 title "Effects of potassium treatment on SnO2 electron transport layers for improvements of perovskite solar cells" @default.
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- W4210346492 doi "https://doi.org/10.1016/j.solener.2022.01.053" @default.
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