Completely Solvent-free Protocols to Access Phase-Pure, Metastable Metal Halide Perovskites and Functional Photodetectors from the Precursor Salts.

ABSTRACT: Mechanochemistry is a green, solid-state, re-emerging synthetic technique that can rapidly form complex molecules and materials without exogenous heat or solvent(s). Herein, we report the application of solvent-free mechanochemical ball milling for the synthesis of metal halide perovskites, to overcome problems with solution-based syntheses. We prepared phase-pure, air-sensitive CsSnX₃ (X = I, Br, Cl) and its mixed halide perovskites by mechanochemistry for the first time by reactions between cesium and tin(II) halides. Notably, we report the sole examples where metastable, high-temperature phases like cubic CsSnCl₃, cubic CsPbI₃, and trigonal FAPbI₃ were accessible at ambient temperatures and pressures without post-synthetic processing. The pero

SUBMITTER: Hong Z 

PROVIDER: S-EPMC6581789 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature