CaSiO_3:Eu^(3+)Bi^(3+)的制备及发光性能  

The preparation of CaSiO^3:Eu^(3+) Bi^(3+) and their luminescence behavior

作　　者：刘惠莲[1] 杨景海[1] 刘文彦[1] 杨丽丽[1] 张永军[1] 

机构地区：[1]吉林师范大学凝聚态物理研究所

出　　处：《东北师大学报（自然科学版）》2007年第3期75-78,共4页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家重点基础研究发展计划项目(2003CD314702-02);吉林省科技发展计划项目(20020615)

摘　　要：采用溶胶-凝胶法合成了具有单斜晶系钙钛矿型CaSiO3结构的CaSiO3∶Eu3+Bi3+发光体.其激发光谱的峰位位于238,396,415,437和359 nm,分别对应于Eu3+—O2-的电荷迁移带、Eu3+的7F0,1—5L6,7F0—5D3,7F1—5D3的跃迁谱线和Bi3+的1S0—3P1吸收峰.在359和395 nm波长的光激发下,Eu3+的5D0—7F2受迫电偶极跃迁峰的强度要比Eu3+的5D0—7F1磁偶极跃迁峰强,表明Eu3+占据更多的是非反演中心格位.探讨了CaSiO3基质中Bi3+对Eu3+的能量传递和敏化作用,结果表明:Bi3+确实对Eu3+起到了敏化作用,它们之间的能量传递方式为共振能量传递.　CaSiO3∶Eu^3＋ Bi^3＋ with monoclinic perovskite structure of CaSiO3 was synthesized via the sol-gel method.From excitation spectrum,it can be seen that peak sites located at 238 nm,396 nm,415 nm,437 nm and 359 nm,originating from charge transfer band of Eu^3＋—O^2-,absorption transition of ^7F0,1—^5L6,^7F0—^5D3 and ^7F1—^5D3 of Eu3＋ ions and ^1S0—^3P1 of Bi^3＋ ions respectively.When the excitation wavelength was 359 nm or 395 nm,electronic dipole transition locating at 609 nm origination from ^5D0—^7F2 of Eu^3＋ ions was stronger than magnetic dipole transition locating at 587 nm origination from ^5D0—^7F1 of Eu^3＋ ions,which indicated that more Eu^3＋ ions were located in non-reversion center lattices.The energy transfer from Bi^3＋ to Eu^3＋ in the luminophors was also discussed.The results showed the Eu^3＋ ions could be well sensitized by Bi^3＋ ions,and pattern of the energy transfers between Bi^3＋ ions and Eu^3＋ ions was resonance energy transfer.

关 键 词：偏硅酸钙 铕 铋 发光 溶胶-凝胶法 

分 类 号：TB321[一般工业技术—材料科学与工程]