铽掺杂对SrAl_2O_4：Eu^(2＋),Dy^(3＋)发光性能的影响  

Modification of Optical Properties of SrAl_2O_4:Eu^(2+),Dy^(3+) Phosphor by Terbium Doping

作　　者：樊国栋[1] 肖国平[1] 张昭[1] 李刚辉[1] 

机构地区：[1]陕西科技大学化学与化工学院,教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《硅酸盐学报》2012年第1期85-89,共5页Journal of The Chinese Ceramic Society

基　　金：陕西省科技攻关项目(2008K07-32);陕西省自然科学专项基金(2010JK436);陕西科技大学研究生创新基金资助

摘　　要：以尿素为燃料,采用快速燃烧法在650℃合成了Tb3+掺杂的SrAl2O4:Eu2+,Dy3+新型长余辉光致发光材料。研究了Tb3+掺杂对Eu2+,Dy3+共激活的铝酸盐长余辉发光材料的发光特性的影响。X射线衍射分析结果表明:当Tb3+的掺杂量x=0.17%时,合成的样品结构为单相SrAl2O4单斜晶系。光致发光测试结果表明:样品的激发光谱为峰值位于345nm附近的连续宽带谱,发射光谱为峰值位于510nm左右的连续宽带谱。余辉衰减曲线结果表明:Tb3+的适量掺杂可以提高铝酸锶的余辉性能。与SrAl2O4:Eu2+,Dy3+相比,掺杂Tb3+有利于形成结晶度良好的固溶体,样品中的晶体细密紧凑,颗粒粒径约为100nm。The SrAl2O4：Eu2＋,Dy3＋ long persistence phosphor doped with Tb3＋ was synthesized by the combustion method at the tem-perature of 650 ℃ using urea as a fuel.The modification of optical properties of the phosphor was studied.The X-ray diffraction patterns indicated that the synthesized samples with a mole fraction of Tb3＋ doping of 0.17% possessed a monoclinic structure.The excitation spectra of the resultant phosphor exhibited a continuous luminescence band with a peak position near to 345 nm and its emission spectra had a peak nearby 510 nm.For the intensity decay curves,the afterglow properties could be modified by Tb3＋ suita-bly doping.Comparing to SrAl2O4：Eu2＋,Dy3＋ phosphor,the doped Tb3＋ favored the solid solution with a good crystalline,and the crystals in the sample were fine and compact and had an average diameter of 100 nm.

关 键 词：燃烧法 长余辉磷光材料 铕 镝 铝酸锶 铽掺杂 

分 类 号：O482[理学—固体物理] O614[理学—物理]