Efficient air-stable perovskite solar cells with a (FAI)_0.46(MAI)_0.40(MABr)_0.14(PbI₂)_0.86(PbBr₂)_0.14 active layer fabricated via a vacuum flash-assisted method under RH > 50.

ABSTRACT: In this work, we present a new kind of perovskite, (FAI)_0.46(MAI)_0.40(MABr)_0.14(PbI₂)_0.86(PbBr₂)_0.14, the vacuum flash-assisted solution processing (VASP) of which can be carried out under relative humidity (RH) higher than 50% in ambient air. The smooth and highly crystalline perovskite showed a maximum PCE of 18.8% in perovskite solar cells. This kind of perovskite was demonstrated to be of good stability in ambient air. Holes and electrons have larger and more balanced diffusion lengths (643.7/621.9 nm) than those in the MAPbI₃ perovskite (105.0/129.0 nm) according to the PL quenching experiment. The role of incorporating a large amount of MA⁺ cations to stabilize the intermediate phase

SUBMITTER: Chen L 

PROVIDER: S-EPMC9062358 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature