文档介绍：铽掺杂对SrAl2O4:Eu2+,Dy3+发光性能的影响
樊,张昭,李刚辉
(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)
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 = %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345 nm附近的连续宽带谱,发射光谱为峰值位于510 nm左右的连续宽带谱。余辉衰减曲线结果显示,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100 nm。
关键词:燃烧法;长余辉磷光材料;铕;镝;铝酸锶;铽掺杂
中图分类号:O482;O614 文献标志码:A 文章编号:0454–5648(2012)01–
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Modification of Optical Properties of SrAl2O4:Eu2+,Dy3+ Phosphor by Terbium Doping
FAN Guodong,XIAO Guoping,ZHANG Zhao,LI Ganghui
(Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, School of Chemistry and
Chemical Engineering, Shaanxi University of Science & Technology, Xi′an 710021, Shaanxi, China)
Abstract: The SrAl2O4:Eu2+,Dy3+ long persistence phosphor doped with Tb3+ was synthesized by bustion method at the temperature of 600 ℃ 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 % 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 p