Inhibition of Phase Segregation in Cesium Lead Mixed-Halide Perovskites by B-Site Doping.

ABSTRACT: The emergence of all-inorganic halide perovskites has shown great potential in photovoltaic and optoelectronic devices. However, the photo-induced phase segregation in lead mixed-halide perovskites has severely limited their application. Herein, by real-time monitoring the photoluminescence (PL) spectra of metal mixed-halide perovskites under light irradiation, we found that the photo-induced phase transition can be significantly inhibited by B-site doping. For pristine mixed-halide perovskites, an intermediate phase of CsPbBr_xI_3-x can only be stabilized under low excitation power. After introducing Sn²⁺ ions, such intermediate phase can be stabilized in nitrogen atmosphere under high excitation power and phase segregation can be started after the exposure

SUBMITTER: Hong D 

PROVIDER: S-EPMC7424214 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature