Valences of rare earth ions in long afterglow phosphors

QI Zeming1 SHI Chaoshu1; 2 LIU Miao2 LIU Bo2 LIU Tao3 XIE Yaning3   1

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Valences of rare earth ions in long afterglow phosphors

更新时间：2021-03-12

- Valences of rare earth ions in long afterglow phosphors
- NUCLEAR TECHNIQUES Issue 1, (2005)
- 作者机构：
  
  1. 中国科学技术大学国家同步辐射实验室
  2. 中国科学技术大学物理系
  3. 中国科学院高能物理研究所,合肥,230029
  4. 中国科学技术大学物理系合肥,230026
  5. ,北京,100049
- 作者简介：
- 基金信息：
  
  863计划资助项目(No.2002AA324060);国家自然科学基金(No.10404028)
- DOI：
  CLC： O611
- Published：01 January 2005
- 稿件说明：
移动端阅览
[1]戚泽明,施朝淑,刘淼,刘波,刘涛,谢亚宁.Eu,Dy共掺杂长余辉发光材料中稀土离子价态的研究[J].核技术,2005(01):21-23.

QI Zeming1 SHI Chaoshu1, 2 LIU Miao2 LIU Bo2 LIU Tao3 XIE Yaning3 1. Valences of rare earth ions in long afterglow phosphors[J]. Nuclear techniques, 2005, (1): 21-23.
[1]戚泽明,施朝淑,刘淼,刘波,刘涛,谢亚宁.Eu,Dy共掺杂长余辉发光材料中稀土离子价态的研究[J].核技术,2005(01):21-23. DOI：

QI Zeming1 SHI Chaoshu1, 2 LIU Miao2 LIU Bo2 LIU Tao3 XIE Yaning3 1. Valences of rare earth ions in long afterglow phosphors[J]. Nuclear techniques, 2005, (1): 21-23. DOI：

摘要

利用同步辐射X射线吸收近边结构（XANES）对Eu

Dy共掺杂硅酸盐体系长余辉发光材料中的稀土离子的价态进行分析

结果表明有+2价和+3价的Eu离子存在

但未发现+1价的Eu离子

而Dy离子则始终以+3价形式存在

未发现+4价Dy离子存在。这说明空穴传输模型还存在许多值得商榷的问题。该研究为进一步研究长余辉材料的发光机理提供了实验依据。

Abstract

Valences of rare earth ions in long afterglow silicate phosphors were studies by L3 edge X-ray absorption near edge structure ( XANES ) spectroscopy. The results show that Eu ions are in divalent and trivalent mixed-valent state while Dy ions exist in trivalent state. No monovalent Eu and tetravalent Dy were observed. Validation of the ex- isting hole-transferring mechanism of long afterglow phosphors was discussed.

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