KMgF_3∶Eu和KMgF_3∶Eu-Ce单晶体中Eu^(2+)与Ce^(3+)的格位取代和能量传递  

Site Substitution and Energy Transfer of Eu^(2+) and Ce^(3+) in KMgF_3∶Eu and KMgF_3∶Eu-Ce Single Crystals

作　　者：苏海全[1] 贾志宏[1] 石春山[1] 

机构地区：[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

出　　处：《高等学校化学学报》2001年第7期1081-1085,共5页Chemical Journal of Chinese Universities

基　　金：国家重点基础研究发展规划项目 ( G19980 6 132 3)

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 KMg F3中的格位取代问题 .在 KMg F3∶ Eu-Ce中观察到了 Eu2 + 的 6P5/ 2 能级到 Ce3+ 的 4 f 5 d能级间的间接能量传递 。The high resolution emission spectra of KMgF 3∶Eu and KMgF 3∶Eu Ce single crystals were measured at 77 K. The site substitution of Eu 2+ and Eu 2+ Ce 3+ co doped system in KMgF 3 was discussed. Eu 2+ substituted for K + sites on three different site symmetry: cubic, trigonal and tetragonal. The attribution of all lines occuring in the emission spectra were ascertained.The indirect energy transfer from 6 P 5/2 states of Eu 2+ to 4 f 5 d states of Ce 3+ in KMgF 3∶Eu Ce was observed and the energy transfer mechanism was studied. The d d interaction among levels was proposed.

关 键 词：能量传递 格位取代 氟化镁钾 铈 铕 单掺杂 双掺杂 光谱 单晶体 

分 类 号：O614.33[理学—无机化学] O433[理学—化学]