TiO2/halide perovskite interface: The impact of surface state passivation on energy alignment and photovoltaic performance of perovskite solar cells

Nikolai Tsvetkov,Anna Nikolskaia,Oleg Shevaleevskiy,Sergey Kozlov,Marina Vildanova,Byeong Cheul Moon,Jeung Ku Kang,Liudmila Larina

Applied Surface Science（2020）

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摘要

•Passivation of the TiO2/perovskite in PSCs by SO42− and Cd2+ by a low cost method.•Trap-assisted recombination at the TiO2/perovskite is suppressed.•The power conversion efficiency of the PSCs was increased from 16.0 to 17.6%.•Interface passivation enhanced the air-stability of PSCs.

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关键词

Perovskite solar cells,Electron transfer layer,Interface electronic structure,Surface passivation,Photoelectron spectroscopy

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