ABSORPTION AND EMISSION-SPECTROSCOPY OF EU-3+ IN METAPHOSPHATE GLASSES

被引:194
作者
CAPOBIANCO, JA [1 ]
PROULX, PP [1 ]
BETTINELLI, M [1 ]
NEGRISOLO, F [1 ]
机构
[1] UNIV PADUA,DIPARTIMENTO CHIM INORGAN MET ORGAN & ANALIT,I-35131 PADUA,ITALY
来源
PHYSICAL REVIEW B | 1990年 / 42卷 / 10期
关键词
D O I
10.1103/PhysRevB.42.5936
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Optical absorption and emission spectra of Eu3+ in Ba(PO3)2, Zn(PO3)2, and Pb(PO3)2 glasses are reported. Judd-Ofelt intensity parameters for f-f transitions were derived from the integrated absorption spectra and used to calculate the spontaneous emission probabilities from the 5D0 state. Fluorescence-line-narrowed emission excited by the 5D0 7F0 transition was used to study local structure around the Eu3+ ion. A phenomenological crystal-field analysis was conducted using C2v symmetry, and it was found that the sites occupied by Eu3+ in the glasses are adequately described by Brecher and Risebergs model. The influence of the network modifier ions (Ba, Zn, and Pb) on the major crystal-field parameter ratio (B22/B20 and B44/B40) is discussed. Furthermore, it was shown that the network modifier ions affect the properties of the Eu-O bond, and, consequently, the crystal-field strength. © 1990 The American Physical Society.
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页码:5936 / 5944
页数:9
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