Crystal Structure Features of CsPbBr₃ Perovskite Prepared by Mechanochemical Synthesis.

ABSTRACT: We present a mechanochemical procedure, with solvent-free, green-chemistry credentials, to grow all-inorganic CsPbBr₃ perovskite. The crystal structure of this perovskite and its correlations with the physicochemical properties have been studied. Synchrotron X-ray diffraction (SXRD) and neutron powder diffraction (NPD) allowed us to follow the crystallographic behavior from 4 to 773 K. Unreported features like the observed negative thermal expansion of the b unit-cell parameter stem from octahedral distortions in the 4-100 K temperature range. The mechanochemical synthesis was designed to reduce the impact energy during the milling process, leading to a defect-free, well-crystallized sample characterized by a minimum unit-cell volume and octahedral tilting angles in the l

SUBMITTER: Lopez CA 

PROVIDER: S-EPMC7098001 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature