高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (3): 349.

• 研究论文 • 上一篇    下一篇

BaLiF3:Eu,Gd中Gd3+→Eu2+的能量传递

贾志宏, 李竑, 叶泽人, 石春山   

  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
  • 收稿日期:2001-05-14 出版日期:2002-03-24 发布日期:2002-03-24
  • 通讯作者: 石春山(1939年出生),男,研究员,博士生导师,从事稀土固体化学研究.
  • 基金资助:

    国家重点基础研究发展规划项目(批准号:G1998061306);国家自然科学基金(批准号:50072031)资助

Gd3+→Eu2+ Energy Transfer in BaLiF3:Eu,Gd

JIA Zhi-Hong, LI Hong, YE Ze-Ren, SHI Chun-Shan   

  1. Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2001-05-14 Online:2002-03-24 Published:2002-03-24

摘要: 研究了BaLiF3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=1.35×105s-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,发射强度降低.

关键词: 复合氟化物, 稀土离子光谱, 能量传递

Abstract: Photoluminescence characteristics and the energy transfer between Gd3+ and Eu2+ in BaLiF3 matrix have been investigated. Aseries of concentrations of Gd3+ ion with a fixed Eu2+concentration doped in BaLiF3:Gd3+, Eu2+ has been studied. When the doping concentration for Gd3+ was 0.3%, the system reached the highest energy transfer efficiency. Due to the competitive absorption for the Gd3+ and the Eu2+ ions in BaLiF3:Gd3+:Eu2+, when the doping concentration for Gd3+ ion exceeded 0.3%, the continuously increasing concentration of Gd3+ ions caused the competitive absorption ratio for Gd3+ increasing and the emission intensity of Eu2+ decreasing. The energy transfer processes were discussed, while the transfer probability was calculated to be 1.35×105s-1.

Key words: Complex fluoride, Rare earth ion spectrum, Energy transfer

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