(1. 昆明理工大学 真空冶金国家工程实验室，昆明 650093；
2. 昆明理工大学 云南省有色金属真空冶金重点实验室，昆明 650093；
3. 昆明理工大学 冶金与能源工程学院，昆明 650093)
摘 要: 采用高温固相反应法制备出新型红色长余辉发光材料Gd2O2S:Eu3+, Xn+(X为Mg、Si、Ti中的一种或两种)，研究掺杂离子对Gd2O2S:Eu3+磷光体的晶体结构、形貌粒度和发光性能的影响。通过X射线粉末衍射(XRD)、扫描电镜(SEM)和分光光度计等对合成产物进行分析与表征。结果表明：掺杂离子没有改变Gd2O2S:Eu3+磷光体的晶体结构，颗粒的形貌为类球形，分散性良好。同时，掺杂离子显著地延长发光材料Gd2O2S:Eu3+的余辉时间，并显示纯正的红色发光。
关键字: Gd2O2S:Eu3+；磷光体；掺杂离子；光谱
structure and luminescent properties of Gd2O2S:Eu3+ phosphor
（1. National Engineering Laboratory for Vacuum Metallurgy,
Kunming University of Science and Technology, Kunming 650093, China;
2. Yunnan Provincial Key Laboratory of Nonferrous Vacuum Metallurgy,
Kunming University of Science and Technology, Kunming 650093, China;
3. Faculty of Metallurgical and Engineering, Kunming University of Science and Technology, Kunming 650093, China）
Abstract:Gd2O2S:Eu3+, Xn+ (X is Mg, Si or Ti), as a novel red long afterglow phosphor, was synthesized by high- temperature solid-state reaction method. And the effects of the doped ions on the crystal structure, particle size distribution, luminescent properties and afterglow properties of the Gd2O2S:Eu3+ phosphor were studied. The synthesized phosphors were investigated, respectively, by XRD, SEM and fluorescence spectrophotometer. The results show that the doped ions do not change the crystal structure of Gd2O2S:Eu3+, which is hexagonal crystal structure and similar to that of Gd2O2S matrix. The particles of Gd2O2S:Eu3 +, Xn+ (X is Mg, Si or Ti) are basically spherical in shape, with good dispersion. There is red shift of its main excitation peak which is also broadened and strengthened on the excitation spectrum by doping Mg2+, Si4+, Ti4+, etc. And the enhancement of luminescent properties including brightness and long-afterglow property is also confirmed due to incorporations of doped ions.
Key words: Gd2O2S:Eu3 +; phosphor; dopant; spectrum
