Research Progress on Cs2AgInCl6-based Red Persistent Luminescence Materials (A Review)

The Cs2AgInCl6 system of persistent luminescence materials possesses a unique double perovskite crystal structure and exhibits characteristic red afterglow emission. These crystals can be synthesized via a straightforward hydrothermal reaction, yielding products of high phase purity and notably prolonged afterglow duration. The underlying mechanisms responsible for the persistent luminescence have been elucidated through experimental techniques such as low-temperature photoluminescence spectroscopy. Furthermore, performance optimization has been achieved through modification strategies including ion co-doping, which enables precise regulation of trap energy levels and their distribution within the material. Such control facilitates the enhancement of afterglow properties, thereby unlocking their potential for practical applications. This review systematically summarizes the structural characteristics and luminescence mechanisms of Cs2AgInCl6-based persistent luminescence materials, discusses various modification approaches such as Mn2+ doping, rare-earth ion doping and Na+/Bi3+ doping. And this review provides a comprehensive overview and prospective analysis of their applications in lighting, information storage, and anti-counterfeiting technologies.