文献类型：期刊文献

中文题名：Gd^(3+)Tb^(3+)能量转移与Tb^(3+)自敏化效应对重金属锗酸盐玻璃发光性能的影响

英文题名：Effects of Gd^(3+)-Tb^(3+) energy transfer and Tb^(3+) self-sensitization on luminescent properties of Tb^(3+)-doped heavy germanate glasses

作者：饶金华[1];杨云霞[1];袁双龙[1];张俊标[1];陈国荣[1];S.Baccaro[2];A.Cecilia[2];M.Nikl[3]

机构：[1]华东理工大学材料科学与工程学院无机材料研究所,上海200237;[2]意大利国家能源,环境,新技术研究中心(ENEA)电离辐照实验室(FIS/ION);[3]捷克国家科学院物理研究所光学实验室

年份：2005

卷号：36

期号：1

起止页码：109

中文期刊名：功能材料

外文期刊名：Journal of Functional Materials

收录：CSTPCD;;EI(收录号：2005118999928);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金资助项目(NSFC 50242017);上海市重点学科建设基金;上海市科委国际合作基金资助项目(035207015)

语种：中文

中文关键词：重金属氧化物;锗酸盐玻璃;闪烁体;能量转;移交叉弛豫;X射线激发发射光谱

外文关键词：Gadolinium;Germanium compounds;Heavy metal compounds;Luminescence of inorganic solids;Phosphors;Terbium

摘要：研究了一组Tb3+掺杂重金属锗酸盐玻璃的发光特性。玻璃样品的 X 射线激发发射光谱结果显示,玻璃基质中由 Gd3+ 离子向发光中心 Tb3+ 的能量转移机制以及在一定浓度范围内 Tb3+ 之间的交叉弛豫过程对玻璃的发光性能有重要影响。前者表现在Gd3+紫外发射光的减弱及 Tb3+ 绿发射光的增强,后者则显示Tb3+在一定浓度范围内所特有的自敏化效应,使其蓝发射光减弱、绿发射光增强。第 3 种稀土离子La3+的引入对发光中心 Tb3+ 离子具有分离效应,使Tb3+之间的交叉弛豫概率降低,蓝发射光增强。
Luminescent properties of some terbium-doped heavy germanate glasses were studied in the present work. Results of measured radioluminescence spectra show that energy transfer mechanisms occurring from Gd3+ cations towards Tb3+ emission centers as well as the cross relaxation among Tb3+ cations within the certain concentration range exert tremendous effects on the emission intensity of glasses. The former involves the enhanced Tb3+ green emission at the cost of Gd3+ UV emission while the latter was associated with the self-sensitizing effect of Tb3+ under the certain Tb3+ concentration range which contributes to the enhanced Tb3+ green emission and the weakened Tb3+ blue emission. It is also found that addition of the third type of rare earth cation La3+ plays a role of partitioning Tb3+ in the glass matrix by showing the reduced cross relaxation probability among Tb3+ cations corresponding to the enhanced Tb3+ blue emission.