高等学校化学学报

高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (6): 571.

• 研究论文 • 上一篇    下一篇

在硅磷酸镧中Ce3+离子对Tb3+离子的敏化

黄竹坡, 马国领   

  1. 北京大学化学系
  • 收稿日期:1987-10-14 出版日期:1989-06-24 发布日期:1989-06-24
  • 通讯作者: 黄竹坡
  • 基金资助:

    国家自然科学基金

The Sensitization of Tb3+ Luminescence by Ce3+ in Lanthanum Silicophosphates

Huang Zhupo, Ma Guoling   

  1. Department of Chemistry, Peking University, Beijing
  • Received:1987-10-14 Online:1989-06-24 Published:1989-06-24

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摘要： 实验表明在La2O3·0.01SiO2·0.95P2O5基质中Ce3+对Tb3+有强的敏化作用。研究了在254nm紫外光激发下温度对Tb3+激活和Ce3+K、Tb3+共激活试样的发射强度的影响及Ce3+、Tb3+共激活的试样Tb3+的5D4→7F6:5:4跃迁的发射强度随温度的变化。计算了Ce3+到Tb3+的能量传递效率。初步探讨了Ce对Tb的能量传递机理。

关键词: 铈, 铽, 敏化, 硅磷酸盐, 发光

Abstract: We studied the emission and excitation spectra of Tb3+-activated as and Ce3+ and Tb3+-coactivated 2O3·0.01 SiO2·0.95 P2O5. Though the comparison between emission and excitation spectra, we have found that luminescence of Tb3+ is greatly sensitized and enhanced in the presence of Ce3+ .The effect of temperature on the luminescence of Tb3+- activated as well as Ce3+ and Tb3+ -coactivated phosphorus was studied.The energy transfer efficiency from Ce3+ to Tb3+ was calculated to be more than 95%. The mechanism of energy transfer from Ce3+ to Tb3+ has been shown to be a resonance process.The phosphorus shows different concentration quenching conditions under various types of excitation. The higher the excitation energy, the smaller the concentration at which the quenching starts to occur. The optimum concentration for Tb3+ emission under different excitations was determined.

Key words: Cerium, Terbium, Sensitization, Silicophosphate, Luminescence

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