Formation mechanisms and phase stability of solid-state grown cspbi3 perovskites

Satta J.;Chiriu D.;Carbonaro C. M.;Stagi L.;Ricci P. C.
2021

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, Cs4PbI6, was observed, together with the 715 nm-emitting γ phase.
eng
11
7
1823
1
16
16
Esperti anonimi
internazionale
Scientifica
sCsPbI3; inorganic lead halide perovskites; solid-state synthesis; phase stability
si
Satta, J.; Casu, A.; Chiriu, D.; Carbonaro, C. M.; Stagi, L.; Ricci, P. C.
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
6
open
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