Pr^(3+)对CaBi_4 Ti_4O_(15):Eu^(3+)发光性能的影响  

The Effect of Pr^(3+) on Luminescent Properties of CaBi_4 Ti_4O_(15):Eu^(3+) Phosphor

作　　者：王新[1] 崔瑞瑞[1] 邓朝勇[1] 

机构地区：[1]贵州大学电子信息学院,贵州省电子功能复合材料特色重点实验室,贵州贵阳550025

出　　处：《贵州大学学报（自然科学版）》2013年第6期19-22,共4页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金项目资助(50725416);贵州省科技计划支持项目资助(2012-3005;2011-2104);贵阳市科技计划项目资助(2012101-2-4)

摘　　要：本文研究了采用传统的高温固相反应法所合成的CaBi4Ti4O15:Eu3+荧光粉的微观结构及光学性质。通过X射线衍射仪和扫描电镜分析了荧光粉的物相及其显微结构,并利用荧光光谱仪测试了CaBi4Ti4O15:Eu3+荧光粉的激发和发射光谱。当样品采用465 nm的蓝光激发时,其主发射峰位于594 nm和615 nm处,分别对应于5D0→7F1,5D0→7F2的辐射跃迁。研究了Eu3+离子浓度对发光性能的影响,在其掺杂浓度为0.20 mol%时达到最大值。最后,研究了Pr3+离子对CaBi4Ti4O15:Eu3+荧光粉发光性能的影响。实验结果表明,适量的掺杂Pr3+离子可以提高产品的发光性能。The structural and luminescent properties of Ca ix Bi4Ti4Ol5 ： xEu3＋ （X =0.05, x =0. 10, X = 0. 15, x = 0.20, x = 0.25 ） phosphors synthesized by a traditional solid state method were investigated. The phosphors have been characterized by X -ray diffraction （ XRD）, field-emission scanning electron microscopy （FESEM） and fluorescence measurements. Upon 465 nm blue light excitation, the excitation band consist of several bands around at 594 nm and 615 nm, corresponding to the 5D0→7F1 and 5D0→7F2 transitions of Eu3~ , respectively. Through the investigation of the effect of Eu3＋ ions concentration, it is found that the emitting intensity gets to a maximum when the Eu3＋ ions concentration is x= 0. 20. Finally, the effect of luminescent properties of Ca-Bi4Ti4Ol5 ： xEu3＋ co-doping with Pr3＋ was discussed. The result shows that moderate doping of Pr3＋ can enhance the luminescent properties of the phosphor.

关 键 词：LED 荧光粉 光致发光 BLSF 

分 类 号：O433.4[机械工程—光学工程]