Research Progress on Metal Halide Long Persistent Luminescence Materials

As a new type of luminescent material， metal halide long persistent luminescence materials have attracted increasing attention from researchers. These materials exhibit outstanding optical properties such as tunable emission color， high emission efficiency， and ultra-long persistent luminescence， have shown great application potential in various fields such as indicator signs， anti-counterfeiting， information storage， and X-ray imaging. Therefore， advancing the performance development and optimization of metal halide long persistent luminescence materials is of paramount theoretical significance and practical application value. This review summarizes the representative research progress of metal halide long persistent luminescence materials， reviews the ion doping strategies of regulating the long persistent luminescence properties， and enumerates their applications in anti-counterfeiting， information encryption and storage， as well as X-ray detection and imaging. Finally， the current research status and existing challenges in this field are analyzed in depth， and prospects for its future development are presented.