Amine Gas-Induced Reversible Optical Bleaching of Bismuth-Based Lead-Free Perovskite Thin Films.

ABSTRACT: Reversible optical property changes in lead-free perovskites have recently received great interest due to their potential applications in smart windows, sensors, data encryption, and various on-demand devices. However, it is challenging to achieve remarkable color changes in their thin films. Here, methylamine gas (CH₃ NH₂ , MA⁰ ) induced switchable optical bleaching of bismuth (Bi)-based perovskite films is demonstrated for the first time. By exposure to an MA⁰ atmosphere, the color of Cs₂ AgBiBr₆ (CABB) films changes from yellow to transparent, and the color of Cs₃ Bi₂ I₉ (CBI) films changes from dark red to transparent. More interestingly, the underlying reason is found to be the interacti

SUBMITTER: Ji F 

PROVIDER: S-EPMC10811464 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature