Cl alloying improves thermal stability and increases luminescence in iodine-rich inorganic perovskites.

ABSTRACT: The inorganic perovskite CsPbI₃ shows promising photophysical properties for a range of potential optoelectronic applications but is metastable at room temperature. To address this, Br can be alloyed into the X-site to create compositions such as CsPbI₂Br that are stable at room temperature but have bandgaps >1.9 eV - severely limiting solar applications. Herein, in an effort to achieve phase stable films with bandgaps <1.85 eV, we investigate alloying chlorine into iodine-rich triple-halide CsPb(I_0.8Br_0.2-x Cl _x )₃ with 0 < x < 0.1. We show that partial substitution of iodine with bromine and chlorine provides a path to maintain broadband terrestrial absorption while improving upon the perovskite phase

SUBMITTER: Cakan DN 

PROVIDER: S-EPMC11235055 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature