Phase segregation in inorganic mixed-halide perovskites: from phenomena to mechanisms
Abstract
Halide perovskites, such as methylammonium lead halide perovskites ( MAPbX 3 , X = I , Br, and Cl), are emerging as promising candidates for a wide range of optoelectronic applications, including solar cells, light-emitting diodes, and photodetectors, due to their superior optoelectronic properties. All-inorganic lead halide perovskites CsPbX 3 are attracting a lot of attention because replacing the organic cations with Cs + enhances the stability, and its halide-mixing derivatives offer broad bandgap tunability covering nearly the entire visible spectrum. However, there is evidence suggesting that the optical properties of mixed-halide perovskites are influenced by phase segregation under external stimuli, especially illumination, which may negatively impact the performance of optoelectronic devices. It is reported that the mixed-halide perovskites in forms of thin films and nanocrystals are segregated into a low-bandgap I-rich phase and a high-bandgap Br-rich phase. Herein, we present a critical review on the synthesis and basic properties of all-inorganic perovskites, phase-segregation phenomena, plausible mechanisms, and methods to mitigate phase segregation, providing insights on advancing mixed-halide perovskite optoelectronics with reliable performance.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 30, 2020
- Source ID
- 10.1364/prj.402411
Entities
People
- Brendon Tyler Jones
- Chun-ho Lin
- Hanwei Gao
- Jiyun Kim
- Long Hu
- Tom Wu
- Weijian Chen
- Xavier Quintana
- Xiaoming Wen
- Xinwei Guan
- Yutao Wang
Organizations
- Australian Research Council
- National Science Foundation
- Office of Naval Research