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为了寻找新的发光基质材料,用高温固相反应合成了(Li,Ca,A)_2SiO_4:Eu,Bi系列发光体(A=Al,Y,La,Gd).通过激发光谱和发射光谱的测试.首次在碱土金属硅酸盐体系中研究了Al,Y,La,Gd等三价金属离子对Bi~(3+)、Eu~(3+)发光特性和Bi~(3+)敏化Eu~(3+)发光性能的影响,得到了良好的基质组成.实验结果表明.基质中适当含量的Gd~(3+)可大幅度提高Eu~(3+)的发光强度,使~5D_0-~7F_2发射强度增加6倍.Bi~(3+)对Eu~(3+)有很好的敏化作用,以A=Gd或Al时较好,对~5D_0-~7F_1辐射跃迁的敏化效果尤为突出.
In order to find a new luminescent host material, (Li, Ca, A) _2SiO_4: Eu, Bi series luminophores (A = Al, Y, La, Gd) were synthesized by high temperature solid-state reaction The effect of the trivalent metal ions such as Al, Y, La, Gd on the luminescence properties of Bi 3+, Eu 3+ and Bi 3+ sensitized Eu ~ (3+) luminescence properties, and the good matrix composition was obtained.The experimental results show that the appropriate content of Gd 3+ in the matrix can greatly improve the luminescence intensity of Eu 3+, ~ 7F 2 emission intensity increased six times.Bi ~ (3+) had a good sensitization effect on Eu ~ (3+), and it was better when A = Gd or Al to sensitize the transition of ~ 5D_0 ~ ~ 7F_1 radiation The effect is particularly prominent.