掺杂离子对Gd2O2S:Eu3+磷光体结构和发光性能的影响

摘要

Gd2O2S:Eu3+, XM+ (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.%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.