LAUSR

Abstract A new vanadate Ca 3 LiMgV 3 O 12 and its Eu 3+ -doped counterparts were synthesized. Rietveld confinement result of Ca 3 LiMgV 3 O 12 host indicates that it belongs to cubic space group Ia-3d with parameters of a =  12.4300 A, V = 1920.49 A 3 , Z  = 8. Under UV excitation, pure Ca 3 LiMgV 3 O 12 exhibits a bluish-green broadband emission at 490 nm, while Eu 3+ doped Ca 3 LiMgV 3 O 12 shows one bluish-green broad band with a series of red sharp peaks, which originate from the V 5+ -O 2- charge transfer and the Eu 3+ intra - 4 f transitions, respectively. The occurrence of VO 4 →Eu 3+ energy transfer is confirmed by decay lifetime analysis and time-resolved emission spectra. It is found that emitting color varies from bluish-green to orange-red with increasing Eu 3+ concentration. VO 4 bluish-green and Eu 3+ red emission shows different thermal quenching response with increasing temperature, due to their different activation energy.