Surface defect passivation of All-Inorganic CsPbI2Br perovskites via fluorinated ionic liquid for efficient Outdoor/Indoor photovoltaics processed in ambient air

Jitendra Bahadur,SungWon Cho,Padmini Pandey,Jun Ryu,Saemon Yoon,Dong-Gun Lee,Jun Tae Song,Jung Sang Cho,Dong-Won Kang

Applied Surface Science（2023）

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Abstract

•For the first time, we have used CFBA passivation on CsPbI2Br film.•CFBA surface treatment assists to develop highly crystalline and compact film.•CFBA modification significantly reduced the trap-assisted density.•Optimized CFBA based PSC showed an impressive PCE of 17.07%.•A noticeable indoor PCE of 23.24% was found under LED light (3200 K, 1000 lx).

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Key words

Inorganic perovskite solar cells, Surface passivation strategy, 3-(Trifluoromethyl) benzylamine, Outdoor, Indoor photovoltaics

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