BaLiF_3∶Eu,Gd中Gd^(3+)→Eu^(2+)的能量传递  

Gd^(3+)→Eu^(2+) Energy Transfer in BaLiF_3∶Eu,Gd

作　　者：贾志宏[1] 李竑[1] 叶泽人[1] 石春山[1] 

机构地区：[1]中国科学院长春应用化学研究所稀土化学与物理重点实验室,长春130022

出　　处：《高等学校化学学报》2002年第3期349-352,共4页Chemical Journal of Chinese Universities

基　　金：国家重点基础研究发展规划项目 (批准号 :G19980 613 0 6);国家自然科学基金 (批准号 :5 0 0 72 0 3 1)资助

摘　　要：研究了 Ba Li F3中 Gd3+和 Eu2 +的光谱性质及 Gd3+对 Eu2 +的能量传递过程 ,讨论了传递机理 .Gd3+的含量 (物质的量分数 )为 0 .3 %时 ,传递效率最高 ,传递几率 PSA=1 .3 5× 1 0 5s- 1 .当 Gd3+的含量高于 0 .3 %时 ,由于 Gd3+ 和 Eu2 + 竞争吸收 Gd3+ 占优势 ,增加 Gd3+ 含量 ,竞争吸收比相应增加 ,Eu2 + 自身吸收光子数目减少 。Photoluminescence characteristics and the energy transfer between Gd\+\{3+\} and Eu\+\{2+\} in BaLiF\-3 matrix have been investigated. A series of concentrations of Gd\+\{3+\} ion with a fixed Eu\+\{2+\}concentration doped in BaLiF\-3∶Gd\+\{3+\}, Eu\+\{2+\} has been studied. When the doping concentration for Gd\+\{3+\} was 0.3%, the system reached the highest energy transfer efficiency. Due to the competitive absorption for the Gd\+\{3+\} and the Eu\+\{2+\} ions in BaLiF\-3∶Gd\+\{3+\}∶Eu\+\{2+\}, when the doping concentration for Gd\+\{3+\} ion exceeded 0.3%, the continuously increasing concentration of Gd\+\{3+\} ions caused the competitive absorption ratio for Gd\+\{3+\} increasing and the emission intensity of Eu\+\{2+\} decreasing. The energy transfer processes were discussed, while the transfer probability was calculated to be 1.35×10\+5 s\+\{-1\}.

关 键 词：复合氟化物 稀土离子光谱 能量传递 氟化锂钡 铕 钆 掺杂 固体激光材料 

分 类 号：TN244[电子电信—物理电子学] O433[机械工程—光学工程]