X射线激发Pr3+掺杂（La,Y）PO4的UVC发光及余辉特性  

UVC Luminescence and Afterglow Properties of Pr3+ Doped （La,Y）PO4 Excited by X-ray

作　　者：胡悦 李蕴乾 袁鹏 李天义 杨艳民[1] Hu Yue;Li Yunqian;Yuan Peng;Li Tianyi;Yang Yanmin(College of Physics Science and Technology ,Hebei University, Hebei Key Lab of Optic-electronic Information and Materials, Baoding 071002 , China)

机构地区：[1]河北大学物理科学与技术学院河北省光电信息与材料重点实验室

出　　处：《中国稀土学报》2019年第3期298-302,I0002,共6页Journal of the Chinese Society of Rare Earths

基　　金：国家自然基金面上基金项目(A2015201192);教育厅重点基金项目(ZD2014096)资助

摘　　要：采用高温固相法成功合成了纯相的LaPO4:Pr^3+, YPO4:Pr^3+以及YPO4:Bi荧光粉,通过XRD对样品进行物相分析表明,磷酸镧为单斜相晶系,磷酸钇为四方晶系。分别探究了在X射线激发下的UVC发光性质以及在X射线激发后的UVC余辉性质,发现这3种荧光粉在X射线激发下都具有强烈的UVC发射,发现在X射线激发后YPO4:Pr^3+和YPO4:Bi荧光粉都具有UVC余辉发射,其中, YPO4:Pr^3+荧光粉的UVC余辉可持续5 min以上,而YPO4:Bi荧光粉的UVC余辉可持续1 h以上。单独对YPO4:Pr^3+荧光粉进行了热释发光分析,并估算出其陷阱距离导带的位置,对其产生UVC余辉的机制进行了系统的描述和解释。The pure phase LaPO4:Pr^3+, YPO4:Pr^3+ and YPO4:Bi phosphors were successfully synthesized through conventional solid state reaction. The characterization of the samples by XRD showed that LaPO4 phosphor was monoclinic crystal system and YPO4 phosphor was tetragonal. The UVC luminescence properties upon X-ray excitation and the UVC persistent luminescence properties after X-ray excitation were explored respectively. It was found that all three phosphors had strong UVC emission under X-ray excitation, and it was also found that both YPO4:Pr^3+ and YPO4:Bi phosphors had UVC persistent luminescence after X-ray excitation, among which the UVC afterglow of YPO4:Pr^3+ phosphor could last for more than 5 min, while the UVC afterglow of YPO4:Bi phosphor could last for more than 1 h. The thermoluminescence analysis of YPO4:Pr^3+ phosphor was carried out, and the position of the trap was estimated. The mechanism for generating UVC afterglow was systematically described and explained.

关 键 词：LAPO4 YPO4 X射线 UVC 余辉 

分 类 号：O434.2[机械工程—光学工程]