PHOTOLUMINESCENCE AND THERMOLUMINESCENCE PROPERTIES OF Ce~(3+) DOPED Ca_2MgSi_2O_7 PHOSPHOR

摘要

The novel alkaline earth silicate based phosphor Ca_2MgSi_2O_7 activated with the trivalent rare earth Ce~(3+) ion (4 mol%) was synthesized by solid state reaction method and their characterization and luminescent properties were investigated. The emission and excitation spectra, and TL glow curves were employed to study the luminescence properties. The kinetic parameters were calculated using TL glow curve. The calcined powders of the Ce~(3+) emits ultraviolet light. In the photoluminescence investigations, there is a single and highly symmetric site for activator ions in the Ca_2MgSi_2O_7 host lattice. The sharp emission properties show that the Ca_2MgSi_2O_7 is a suitable host for rare-earth doped laser crystal and phosphor material.