Stability of the Halide Double Perovskite Cs₂AgInBr₆.

ABSTRACT: Cs₂AgInBr₆ is among the lead-free halide perovskites of interest, predicted by first-principles calculations to be stable with a direct band gap, but there has been only one report of its synthesis. Herein we report the formation of Cs₂AgInBr₆ thin films through thermal evaporation of CsBr, AgBr, and InBr₃ and subsequent annealing between 130 °C and 250 °C. Cs₂AgInBr₆ appears stable in this temperature range. However, Cs₂AgInBr₆ thin films are thermodynamically unstable at room temperature, remaining cubic only long enough to be characterized but not long enough to be useful for practical devices. Cs₂AgInBr₆ decomposed into Cs₂AgBr₃, Cs₃I

SUBMITTER: Liu Y 

PROVIDER: S-EPMC10068733 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature