Citation: WU Jiang, ZHANG Ping, JIANG Chun-Dong, QIU Ze-Zhong. Preparation and Luminescence Properties of Green Phosphors Ca3Y2Si3O12:Tb3+, Ce3+[J]. Chinese Journal of Inorganic Chemistry, ;2015, (6): 1201-1206. doi: 10.11862/CJIC.2015.136
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The green-emitting Ca3Y2-x-ySi3O12:xTb3+, yCe3+ silicate phosphors were synthesized by a high temperature solid-state method. The principal crystalline of the samples is Ca3Y2Si3O12, which is belonging to the monoclinic system. All the phosphors can be effectively excited in the range of 300 nm to 450 nm, and emit green light. Excited by 370 nm, the emission peaks mainly locate at 490 nm (5D4→7F6) 544 nm(5D4→7F5), 585 nm(5D4→7F4) and 621 nm(5D4→7F3). The effect of sintering conditions, doping concentration and Ce3+ co-doping was studied on the luminescence properties of the phosphors. The sample twice sintered for 6 h at 1400 ℃ shows the best performance. The optimum doping content of Tb3+ is x(Tb3+)=20mol%. The emission intensity of the phosphors can be increased by the Ce3+ ion co-doping, and the test shows that the best doping amount is 4mol%. The result confirms the presence of Ce3+→Tb3+ energy transfer.
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