Tb^(3+)掺杂锂铝硅酸盐玻璃的光致发光和辐照致发光  

Photoluminescence and Radioluminescence of Tb^(3+) Ion-Doped Lithium Aluminosilicate Glasses

作　　者：陈艳平[1] 罗德礼[2] 黄斌[1] 程浩[1] 唐贤臣[1] 李强[1] 雷洪波[1] 陈丹平[3] CHEN Yan-ping;LUO De-li;HUANG Bin;CHENG Hao;TANG Xian-chen;LI Qiang;LEI Hong-bo;CHEN Dan-ping(Institute of Materials,China Academy of Engineering Physics,Mianyang 621907,China;Science and Technology on Surface Physics and Chemistry Laboratory,Mianyang 621907,China;Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]中国工程物理研究院材料研究所,四川绵阳621907 [2]表面物理与化学重点实验室,四川绵阳621907 [3]中国科学院上海光学精密机械研究所,上海201800

出　　处：《光谱学与光谱分析》2021年第6期1863-1868,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(51872308)资助。

摘　　要：采用熔融-淬冷法制备了Tb^(3+)掺杂锂铝硅酸盐闪烁玻璃,用紫外激发光谱、发射光谱及荧光寿命表征了光致发光性能,用X射线和阴极射线激发测试了辐射致发光性能。研究结果表明:低Tb^(3+)掺杂浓度时,随着其浓度增大,Tb^(3+)间的交叉弛豫增加导致了^(5)D_(3)→^(7)F_(j)跃迁的能量逐渐向^(5)D_(4)→^(7)F_(j)迁移转变,^(5)D 3激发态的荧光寿命和发射强度均明显下降,^(5)D 4^(7)F_(j)发射强度逐渐增大。较高Tb^(3+)浓度时,其浓度继续增加会提升非辐射比例,是荧光寿命降低和荧光猝灭的最主要原因。比较光致发光和辐照致发光性能,发现随着激发源的能量上升,会增加激发态^(5)D_(3)能级向^(5)D_(4)能级的能量转移,同时,由于玻璃的密度低会导致辐照致发光效率随激发源的能量上升而下降。The lithium aluminosilicate scintillation glasses doped with different concentrations of Tb^(3+) ions were prepared by the melt quenching method.Photoluminescence properties were characterized by UV excitation,emission and fluorescence lifetime,and radio luminescence properties were measured by X-ray and cathode-ray excitation.The results show that the cross relaxation between Tb^(3+)ions increased with increasing the doping concentration of Tb^(3+) ions in the case of low concentration of Tb^(3+),which resulted from the energy of^(5)D_(3)→^(7)F_(j) transition transfers to 5 D 4→^(7)F_(j) transition,so it leads to the fluorescence lifetime and emission intensity of^(5)D_(3)excited state decreasing.The emission intensity of^(5)D_(4)→^(7)F_(j) increasing.When the concentration of Tb^(3+) ions continued to increase in higher concentration of Tb^(3+)ions,the nonradiative transition would be increased,which was the main reason for the decrease of fluorescence lifetime and emission intensity of^(5)D_(4) excited state.It can be found that the energy transfer from^(5)D_(3)energy level to^(5)D_(4) energy level was increased with the increasing energy of excitation source by comparing the photoluminescence and radioluminescence,which is due to that the density of the glass was low.

关 键 词：Tb^(3+)掺杂 锂铝硅酸盐玻璃 光致发光 辐照致发光 

分 类 号：TQ617.3[化学工程—精细化工]