中华医学超声杂志

应用化学 ›› 1989, Vol. 0 ›› Issue (5): 26-30.

• 研究论文 • 上一篇    下一篇

Eu2+和Ce3+激活的BaYF5荧光性质

刘应亮, 石春山, 李有谟   

  1. 中国科学院长春应用化学研究所稀土化学与物理开放实验室
  • 收稿日期:1988-12-27 修回日期:1989-03-25 出版日期:1989-10-10 发布日期:1989-10-10
  • 基金资助:
    国家自然科学基金

LUMINESCENT PROPERTIES OF BaYF5 ACTIVATED BY Eu(Ⅱ) AND Ce(Ⅲ)

Liu Yingliang, Shi Chunshan, Li Youmo   

  1. Labpratory of Rare Earth Chemistry and Physics, Changchum Institute of Applied Chemistry, Academia Sinica
  • Received:1988-12-27 Revised:1989-03-25 Published:1989-10-10 Online:1989-10-10

PDF

398

摘要： 本文讨论了BaYF5中Eu2+和Ce3+的光谱特征及浓度对光谱的影响。Eu2+和Ce3+均表现为d-f跃迁的特征激发和发射。由于Eu2+-Eu2+,Ce3+-Ce3+能量迁移的存在,两者猝灭浓度偏低,其猝灭机理为偶极-偶极相互作用。根据BaYF5基质中Eu2+和Ce3+的能级关系,发现Ce3+对Eu2+的发射具有明显的敏化作用。其机理主要为非辐射多极子作用,但也存在辐射传递。

关键词: 氟化钇钡, 铕(Ⅱ), 铈(Ⅲ)激活, 荧光

Abstract: In present paper luminescent characteristics of Eu (Ⅱ) and Ce(Ⅲ) and their concentra-tion quenching in BaYF5 are studied. Both ions show d-f excitation and emission. Bycomparison with the values reported before,the quenching concentrations of Eu(Ⅱ) and Ce(Ⅲ)are lower because of the energy migration in Eu(Ⅱ)--Eu(Ⅱ) and Ce(Ⅲ)--Ce(Ⅲ). Thequenching mechanism is acquired by the relation between their emission intensities and theirconcentrations, which is dipole-dipole interaction. The energy transfer from Ce (Ⅲ) to Eu(Ⅱ) was found in the system BaYF5. A mechanism ot radiationless energy transfer isproposed based on the electric multipole-multipole interaction in the system.There also exista radiative transfer. A possible way for energy transfer is given.

Key words: Barium and Yttrium fluoride, Euripium (Ⅱ), Cerium (Ⅲ), Activation, Luminescence

网站版权 © 应用化学     本网站备案：吉ICP备12000082号