Structural and Spectral Characteristics of Mechanochemically Prepared CsPbBr3

Mechanochemical treatment of an equimolar mixture of lead and cesium bromides in the absence of solvent gave inorganic halide perovskite CsPbBr3 with characteristic orthorhombic structure consisting of individual nanoparticles with diameter 10-50 nm and nanoparticle agglomerates with diameter up to 200 nm. An effect of dimethylformamide on the structural and spectral properties of the prepared perovskite was discovered. X-ray diffraction data indicated that mechanochemical synthesis contributes to nanostructuring of CsPbBr3 as nanosheets. Nonstationary photoluminescence data indicated that the prepared material has a small amount of defects.