高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (7): 1081.

• 研究论文 • 上一篇    下一篇

KMgF3:Eu和KMgF3:Eu-Ce单晶体中Eu2+与Ce3+的格位取代和能量传递

苏海全, 贾志宏, 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开放实验室, 长春 130022
  • 收稿日期:2000-07-18 出版日期:2001-07-24 发布日期:2001-07-24
  • 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(G1998061323)

Site Substitution and Energy Transfer of Eu2+ and Ce3+ in KMgF3:Eu and KMgF3:Eu-Ce Single Crystals

SU Hai-Quan, JIA Zhi-Hong, 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:2000-07-18 Online:2001-07-24 Published:2001-07-24

摘要: 在77K测定了两个晶体的高分辨发射光谱,讨论了单掺杂Eu2+和双掺杂Eu2+及Ce3+的KMgF3中的格位取代问题.在KMgF3:Eu-Ce中观察到了Eu2+6P5/2能级到Ce3+的4f5d能级间的间接能量传递,讨论了能量传递机理.

关键词: KMgF3, 能量传递, 格位取代

Abstract: The high-resolution emission spectra of KMgF3:Eu and KMgF3:Eu-Ce single crystals were measured at 77 K. The site substitution of Eu 2+ and Eu 2+-Ce 3+ co-doped system in KMgF3 was discussed. Eu 2+ substituted for K+ sites on three differentsite symmetry: cubic, trigonal and tetragonal. The attribution of all lines occuring in the emission spectra were ascertained.The indirect energy transfer from 6P5/2 states of Eu 2+ to 4f 5d states of Ce 3+ in KMgF3:Eu-Ce was observed and the energy transfer mechanism was studied. The d-d interaction among levels was proposed.

Key words: KMgF3, Energy transfer, Site substitution

中图分类号: 

TrendMD: