Luminescent Properties of the Multicolor Afterglow Phosphors Ca3SnSi2O9:Re3+ (Re = Pr, Tb, Sm)

Abstract

Without doping any rare‐earth ions, Ca3SnSi2O9 emits blue light and exhibits weak long‐lasting phosphorescence. By selecting appropriate rare‐earth ions doped into the host, multicolor phosphorescence can be obtained from Ca3SnSi2O9:Re3+ (Re = Pr, Tb, Sm) after excitation at 316 nm, which is due to the persistent energy transfer between the host and rare‐earth ions. The thermoluminescence results indicate that the introduction of Re3+ (Re = Pr, Tb, Sm) produces more suitable traps () depth at 360 K, which make an important contribution to the more excellent long persistent luminescence phenomena.