Multimode dynamic photoluminescent anticounterfeiting and encryption based on a dynamic photoluminescent material

Photoluminescence (PL) has been significantly applied in anticounterfeiting and encryption. However, present PL anticounterfeiting and encryption efforts are based on static PL, which is easily counterfeited by substitutes. In this work, a multimode dynamic PL material MgGa2O4 is developed. Under fixed ultraviolet irradiation, the PL color dynamically changes from green to blue in seconds at room temperature and reverses from blue to green in...