Tb^(3+),Eu^(3+)双掺单基质K_3La(PO_4)_2颜色可调荧光粉的合成与发光性能  

Synthesis and luminescent properties of Tb^(3+) and Eu^(3+)-doped K_3La(PO_4)_2 color tunable phosphors

作　　者：武秀兰[1] 白文妮 海鸥 任强[1] 林飞 焦叶辉 WU Xiu-lan;BAI Wen-ni;HAI Ou;REN Qiang;LIN Fei;JIAO Ye-hui(School of Materials Science and Engineering,Shaanxi University of Science ＆ Technology,Xi＇an 710021,China)

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报》2018年第5期110-115,共6页Journal of Shaanxi University of Science & Technology

基　　金：陕西省科技厅科技统筹创新工程计划项目(2013KTDZ03-02-01);陕西科技大学研究生创新基金项目

摘　　要：采用高温固相法合成了一系列Tb^(3+),Eu^(3+)掺杂的K3La(PO4)2荧光粉.通过X射线衍射,激发发射光谱以及荧光衰减曲线对样品进行了表征.结果表明,随着Tb^(3+)掺杂浓度的增加,K3La(PO4)2:Tb^(3+)荧光粉呈现蓝光至绿光.在K3La(PO4)2:Tb^(3+)荧光粉中加入Eu^(3+)后,存在着Tb^(3+)对Eu^(3+)离子的电偶极-电偶极相互作用的能量转移过程.当Eu^(3+)的掺杂量为9%时,能量转移效率高达85.89%.随着Eu^(3+)的加入,CIE坐标显示荧光粉的发射光颜色呈现绿色→黄色→橙色的渐变.因此K3La(PO4)2:RE3+(RE=Tb,Eu)可实现单相荧光粉的多色发射.A series of Tb3＋, Eu3＋ doped KaLa（PO4）2 phosphors were synthesized by high temperature solid state method. The samples were characterized by X ray diffraction, photo luminescence spectra and fluorescence decay curves. The results show that KaLa（PO4）2.. Tb3＋ phosphors exhibit blue to green light with increasing Tba＋ doping concentration. After adding Eu3＋ to the KaLa（PO4）2：Tb3 ＋ phosphor,there is an energy transfer process of the e lectric dipole electric dipole interaction of Eu3＋ ion by Tb3＋. When the doping amount of Eu3＋ is 9% ,the energy transfer efficiency is as high as 85.89% . With the addition of Eu3＋ , the CIE coordinates show that the color of the emitted light of the phosphor appears as a greenish yellow orange gradient. Therefore, KaLa （PO4）2 ： RE3＋ （RE = Tb, Eu） can realize multi color emission of single phase phosphor.

关 键 词：K3La(PO4)2 高温固相法 能量转移 多色发射 

分 类 号：O482.31[理学—固体物理]