白光LED用新型Eu或Gd共掺杂的Ce:YAG单晶荧光材料的光谱性能研究  

Study on Spectra Characteristics of Newly-Developed Eu or Gd Co-doped Ce:YAG Phosphor for White-LED

作　　者：华伟[1] 向卫东[1] 董永军[2] 梁晓娟[1] 杨帆[1] 金怀东[1] 梁续[2] 吕春燕[3] 

机构地区：[1]温州大学,浙江温州325035 [2]中国科学院上海光学精密机械研究所,上海201800 [3]湖州师范学院,浙江湖州313000

出　　处：《稀有金属材料与工程》2012年第8期1371-1375,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(60708021);上海基础研究重点项目(09JC1414900);上海光技术专项(09DZ1142002;10DZ1140400);温州科技计划项目(G20090082);浙江省科技厅重大科技专项国际科技合作项目(2008C14088)

摘　　要：开展了白光LED用新型YAG单晶荧光材料的制备和光谱性能研究,采用提拉法生长Eu,Ce:YAG及Gd,Ce:YAG晶体,并通过吸收光谱,激发、发射光谱及电光性能等对晶体材料的光谱特性进行表征。结果表明,Eu或Gd共掺杂的Ce:YAG单晶荧光材料均可以被波长460nm左右的蓝光芯片有效激发,产生一个范围为480～650nm的宽峰发射。Eu3+或Gd3+共掺杂会对Ce3+离子的发光产生影响:Eu3+离子的掺杂,会对Ce3+离子的发光产生淬灭效应;而Gd3+离子取代基质Y3+离子可以使Ce3+离子的发射峰发生红移。The growth and spectra characteristics of Eu,Ce and Gd,Ce co-doped YAG single crystals phosphor used for white LED were investigated.Eu,Ce：YAG and Gd,Ce：YAG single crystals were grown by Czochralski method,and their luminescence properties were studied in terms of absorption,emission and excitation spectra.Date analysis reveals that a broad emission band range from 480-650 nm can be produced with blue light excitation.Eu3＋ or Gd3＋ co-doped ions could affect the emission properties of Ce：YAG crystal：Eu3＋ ions co-doping will have the Ce3＋ ions luminous quenching effect.On the contrary,Gd3＋ ions,which is substituted at the Y site,would shift the emission spectra of Ce：YAG crystal to the red spectra.

关 键 词：荧光材料 Ce:YAG单晶 共掺杂 光谱 白光LED 

分 类 号：O482.31[理学—固体物理]