Tb^3＋掺杂对Sr2CeO4∶Eu^3＋发光性能的影响  

Modification of luminescent properties of phosphor Sr_2CeO_4∶Eu^(3+) by Tb^(3+) doping

作　　者：樊国栋[1] 赵琪[1] 陈华[1] 李阿峰[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,陕西西安710021

出　　处：《功能材料》2013年第9期1226-1229,共4页Journal of Functional Materials

基　　金：陕西省科技攻关资助项目(2008K07-32)

摘　　要：以尿素为燃料硼酸为助熔剂,采用燃烧法合成了Sr2CeO4∶Eu3+、Tb3+发光材料。测试结果表明,当Tb3+的掺杂为1%(摩尔分数)时,合成的样品为单相Sr2CeO4斜方晶系结构,其样品的激发光谱为240～370nm的宽带双峰,发射光谱为400～550nm宽带峰,余辉衰减曲线的结果显示,适量的掺杂Tb3+可以提高产品的发光性能。与Sr2CeO4∶Eu3+相比,掺杂Tb3+有利于形成结晶度好的固溶体,样品的发光强度明显提高。The luminescent materials Sr2CeO4 ： Eu^3＋ ,Tb^3＋. were synthesized by combustion method, with urea as fuels and boric acid as flux. The results show that, when the mole fraction of Tb^3＋-doped was 1mol%, the synthesized sample formed a single phase, which belongs to orthorhombic structure. The excitation spectra of Sr2CeO4 ： Eu^3＋ ,Tb^3＋exhibited a continuous bimodal broadband between 240-370nm, and its emission spectra had a Broadband peak nearby 400-550nm. The results of the intensity decay curves showed that the afterglow properties could be modified by Tb^3＋ doping suitably. Comparing to Sr2CeO4; Eu^3＋, Tb^3＋-doped favored the solid solution with good crystalline, and improved the luminous intensity of the sample.

关 键 词：燃烧法 Sr2CeO4∶Eu3+、Tb3+ 发光材料 

分 类 号：O482.31[理学—固体物理] O614.3[理学—物理]