Local structure and its effect on the oscillator strengths and emission properties of Ho3+ in chalcohalide glasses

被引：26
|
作者：
Lee, Tae Hoon
Kwon, Yong Kon
Heo, Jong [1 ]
机构：
[1] Pohang Univ Sci & Technol, Ctr Informat Mat, Pohang 790784, Gyeongbuk, South Korea
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 2008年 / 354卷 / 27期
关键词：
chalcohalides; absorption; luminescence; short-range order;
D O I：
10.1016/j.jnoncrysol.2008.01.017
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The formation of structural units in Ge-Ga-S glass with CsBr addition and its effect on the optical band gap and several spectroscopic properties of Ho3+ were investigated. The optical band gap of the host glasses and the oscillator strengths of Ho3+ absorption decreased sharply when the ratio of CsBr/Ga became close to unity. These property changes were associated with the formation of structural units of [GaS3/2Br](-) and they have a crucial effect on the changes of the local structure around Ho3+ ions. The local structure was not sensitive to the As or Br addition but was critically dependent on the concentration of CsBr. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：3107 / 3112
页数：6
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