Advanced Intelligent Anti‐Counterfeiting in a Memory Storage Phosphor Through Response of Charge Carriers to Temperature

Abstract Persistent phosphor as a printing anti‐counterfeiting material has attracted strong attention owing to its inherent luminescent decay process and multi‐mode luminescence characteristics under external field stimulation. However, the dynamic persistent luminescence (PersL) pattern of a single material is only manifested in color changes and still faces the problem of being easily decrypted. Herein, a multi‐color luminescent material with a wide range distribution of traps is developed, which can emit strong white PersL. In addition, the phosphors show an intelligent response of thermo‐stimulated luminescence to ambient temperature via recalling the charging temperature of the traps. The PersL mechanism is proposed based on electron transfer between PbO 6 and TbO 6 octahedrons through the O bridging. Based on the intelligent response of thermo‐stimulated luminescence to temperature, high‐throughput multi‐channel luminescence anti‐counterfeiting can be achieved on a single phosphor recording layer. This study not only provides further insights into the PersL mechanism, but also opens a new door for constructing intelligent responsive anti‐counterfeiting materials.