Bi^3+离子掺杂对(Y,Gd)AG∶Ce粉体发光性能的影响  

The influence of Bi^(3+)-doping on the luminescence properties of(Y,Gd)AG phosphors

作　　者：李晓东[1] 刘渊溢 李雅楠[1] 吉春明[1] 

机构地区：[1]东北大学材料科学与工程学院,材料各向异性与织构教育部重点实验室,沈阳110004

出　　处：《功能材料》2016年第6期6-9,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51172037);教育部新世纪优秀人才支持计划资助项目(NCET-11-0076);中央高校基本科研业务专项资金资助项目(N130810003;N130610001;N110802001)

摘　　要：以高纯稀土氧化物为原料,采用高温固相法合成了[(Y_(0.5)Gd_(0.5-x-0.005))Bi_xCe_(0.005)]3Al_5O_(12)高亮黄色荧光粉(x=0~0.01),并通过XRD、SEM、PL-PLE和FL等方法对该荧光粉进行了表征。结果表明,在1 400℃下煅烧4h可得到纯石榴石相的(Y,Gd)AG。煅烧所得的[(Y_(0.5)Gd_(0.5-x-0.005))Bi_xCe_(0.005)]3Al_5O_(12)荧光粉具有良好的分散性和均一性。在469nm激发下于563nm附近呈现黄光发射,且Bi ^(3+)掺杂浓度为0.001mol时,样品的发射峰强度达到最大值,提高了近56%,归因于Bi^(3+)→Ce^(3+)能量传递和粉体结晶性能的改善。样品的荧光寿命随着Bi ^(3+)掺杂浓度的增加,先增大后减小。Bi^3＋-doped [（Y0.5Gd0.5-x-0.005 ）BixCe0.005 ]3Al5O12 phosphor powders were synthesized by the solid-state reaction method at high temperatures.The synthesized powders were analyzed by XRD,SEM,PL-PLE and FL.The results show that phase-pure garnet （Y,Gd）AG can be obtained upon calcination at 1 400 ℃ for 4 h.The resultant [（Y0.5 Gd0.5-x-0.005 ）BixCe0.005 ]3Al5O12 powders show well-defined morphology and are dispers-ed.Upon excitation at 469 nm,the phosphor powders show strong yellow emission at 563 nm.When Bi3＋-do-ping concentration was 0.001 mol,the emission intensity of the phosphor powder had a maximum value and was improved by a factor of 0.56.The observed emission enhancement can be ascribed to Bi3＋→Ce3＋ energy transfer and the improvement of the powder crystallinity upon Bi3＋-doping.The fluorescent lifetime of the phosphors first increased and then decreased with increasing Bi3＋-doping concentration.

关 键 词：(Y Gd)AG 荧光粉体 Bi^3+掺杂 能量传递 

分 类 号：O614.33[理学—无机化学]