Polarization dependent light-induced phase segregation in inorganic CsPb(BrxI1-x)3 perovskite microcrystals

Herein, polarization dependent light-induced phase segregation was investigated in inorganic CsPb (BrxI1-x)3 perovskite microcrystals, and a theoretical model based on polarons in the unit structure atmo-sphere was proposed. Light soaking played an important role in the phase segregation process and the polarization of light influenced the ions migration and phase segregation thermodynamics. The recovery and reproduction of the phase segregation phenomenon were also observed by the rotation of the polar-ization surface of the light through experiments, which verified the suppression of phase segregation and enriches the methods to inhibit or control the phase segregation and improve the stability of the material. The model based on the polarons in the lattice distortion environment was used to explain the polarization dependent phase segregation process. This work might provide a way to control phase segregation in a contactless way.(c) 2023 Elsevier B.V. All rights reserved.

Automated summary

In this study, polarization dependent light-induced phase segregation was investigated in inorganic CsPb(BrxI1-x)3 perovskite microcrystals, and a theoretical model based on polarons in the unit structure atmosphere was proposed. Light soaking was found to play a crucial role in the phase segregation process, with the polarization of light influencing the migration of ions and the thermodynamics of phase segregation. Experiments also demonstrated the recovery and reproduction of the phase segregation phenomenon through the rotation of the polarization surface of the light, which confirms the effectiveness of suppressing phase segregation and enriches the methods for controlling it to improve material stability. The model based on polarons in the lattice distortion environment was utilized to explain the polarization dependent phase segregation process. This work provides a contactless approach to control phase segregation.