高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (3): 358.

• 研究论文 • 上一篇    下一篇

BaY2F8:Ce,Eu中Ce3+→Eu2+的能量传递和Ce3+→Eu3+的电子转移

张献明2, 苏海全1, 叶泽人1, 贾志宏1, 臧春雨1, 石春山1   

  1. 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, 长春 130022;
    2. 中山大学化学与化学工程学院, 广州 510275
  • 收稿日期:2000-03-13 出版日期:2001-03-24 发布日期:2001-03-24
  • 通讯作者: 石春山(1939年出生),男,研究员,博士生导师,从事稀土无机化学研究.
  • 基金资助:

    国家重点基础研究发展规划项目(批准号:G1998061323)资助

Energy Transfer from Ce3+ to Eu2+ and Electron Transfer from Ce3+ to Eu3+ in BaY2F8:Ce, Eu Systems

ZHANG Xian-Ming2, SU Hai-Quan1, YE Ze-Ren1, JIA Zhi-Hong1, ZANG Chun-Yu1, SHI Chun-Shan1   

  1. 1. Laboratory of Rare Earth Chemistryand Physics, Changchun Instituteof Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    2. College of Chemistryand Chemical Engineering, Zhongshan University, Guangzhou 510275, China
  • Received:2000-03-13 Online:2001-03-24 Published:2001-03-24

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摘要： 采用高温固相反应法制备了BaY2F8:Ce3+,BaY2F8:Eu2+和BaY2F8:Ce,Eu,测定了它们的激发、发射和漫反射光谱.首次发现并研究了在BaY2F8共掺CeF3和EuF3体系中存在Ce3+→Eu2+的能量传递和Ce3+→Eu3+的电子转移两种过程及其竞争.根据光谱数据,讨论了Ce4+的可能取代格位.

关键词: 稀土氟化物, 能量传递, 电子转移

Abstract: Phorsphors of BaY2F8:Ce 3+, BaY2F8: Eu 2+ and BaY2F8:Ce, Eu were prepared by higher temperature solid reaction and their excitation, emission and diffuse reflection spectra were made. We firstly found that the competition of energy transfer from Ce 3+ to Eu 2+ and electron transfer from Ce 3+ to Eu 3+ existed in CeF3 and EuF3-co-doped BaY2F8 systems. The f-f transition emission of Eu 2+ was increased with increasing x in systems BaY2F8:0.03Ce, x Eu. Ce 4+ ions coexist with Ce 3+ ions and substitute Y 3+ for Ce 4+ in the systems BaY2F8:Eu, Ce.

Key words: Rare earth fluoride, Energy transfer, Electron transfer

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