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\}.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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
