Thermodynamic Stability, Structure, and Optical Properties of Perovskite-Related CsPb₂Br₅ Single Crystals under Pressure.

ABSTRACT: CsPb₂Br₅ belongs to all inorganic perovskite-related quasi-two-dimensional materials that have attracted considerable attention due to their potential for optoelectronic applications. In this study, we solve numerous controversies on the physical properties of this material. We show that optical absorption in the visible spectrum and green photoluminescence are due to microcrystallites of the three-dimensional CsPbBr₃ perovskite settled on the CsPb₂Br₅ plates and that carefully cleaned crystal plates are devoid of these features. The high-pressure structural and spectroscopic experiments, performed on the single crystals free of CsPbBr₃ impurities, evidenced that the layered tetragonal structure of CsPb₂Br_5</

SUBMITTER: Drushliak V 

PROVIDER: S-EPMC9477227 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature