Chemical characteristics of Dy-S bonds in Ge-As-S glass

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Title
Chemical characteristics of Dy-S bonds in Ge-As-S glass
Author(s)
Y G Choi; J H Song; Yong Beom Shin; J Heo
Bibliographic Citation
Journal of Non-Crystalline Solids, vol. 353, no. 16, pp. 1665-1669
Publication Year
2007
Abstract
From Dy L3-edge extended X-ray absorption fine structure spectroscopic analysis of Dy-doped Ge-As-S glass, we verified that both the coordination number and Dy-S distance are decreased in this representative chalcogenide glass compared to those in the Dy2S3 crystalline counterpart. The strong covalent nature inherent in chemical bonds between the constituent atoms of Ge-As-S glass would be responsible for the enhanced covalency of the Dy-S bonds, which would then be sensitively related to the optical characteristics of the 4f ↔ 4f transitions of Dy3+ as well as the low rare-earth solubility exhibited by the Ge-As-S glass.
Keyword
ChalcogenidesLuminescenceRare-earths in glassesX-ray absorption
ISSN
0022-3093
Publisher
Elsevier
DOI
http://dx.doi.org/10.1016/j.jnoncrysol.2007.02.040
Type
Article
Appears in Collections:
Division of Research on National Challenges > Bionanotechnology Research Center > 1. Journal Articles
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