Formation Mechanisms and Phase Stability of Solid-State Grown CsPbI₃ Perovskites.

ABSTRACT: CsPbI₃ inorganic perovskite is synthesized by a solvent-free, solid-state reaction, and its structural and optical properties can be deeply investigated using a multi-technique approach. X-ray Diffraction (XRD) and Raman measurements, optical absorption, steady-time and time-resolved luminescence, as well as High-Resolution Transmission Electron Microscopy (HRTEM) imaging, were exploited to understand phase evolution as a function of synthesis time length. Nanoparticles with multiple, well-defined crystalline domains of different crystalline phases were observed, usually surrounded by a thin, amorphous/out-of-axis shell. By increasing the synthesis time length, in addition to the pure α phase, which was rapidly converted into the δ phase at room temperature, a secondary phase, C

SUBMITTER: Satta J 

PROVIDER: S-EPMC8308418 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature