Circularly polarized perovskite luminescence research progresses

　　Recently, the research team of East China University of Science and Technology has made progress in the research of circularly polarized (CPL) perovskite luminescence
.

　　The research team stabilized perovskite by polymer and constructed a perovskite-liquid crystal device (PeLC) with a double-layer structure, which solved the key problem of poor compatibility between perovskite and liquid crystal, improved the structural stability of perovskite, and improved the The orderly arrangement of liquid crystal molecules is realized, the circularly polarized light emission of perovskite with high luminous efficiency and high stability is realized, and the circularly polarized light patterned display and temperature control anti-counterfeiting application are demonstrated
.

　　CPL refers to the phenomenon that the light-emitting system emits different left-handed and right-handed circularly polarized light.
It has wide application prospects in the fields of three-dimensional display, biosensing, encryption and anti-counterfeiting, and photocatalytic asymmetric synthesis
.
Metal halide perovskite materials have excellent properties such as high fluorescence quantum efficiency, narrow emission peaks, and tunable emission wavelengths, and are expected to be ideal new CPL materials
.
Existing perovskite CPL materials suffer from low luminous efficiency, and their stability is rarely studied, limiting their practical applications
.