Structure and optical properties of Eu3+-doped fluoroaluminate and fluorophosphate glasses

被引:19
作者
Inoue, H [1 ]
Soga, K [1 ]
Makishima, A [1 ]
机构
[1] Univ Tokyo, Sch Engn, Dept Mat Sci, Tokyo 113, Japan
关键词
D O I
10.1016/S0022-3093(97)00362-1
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
Emission spectra of Eu3+ in fluoroaluminate and fluorophosphate glasses at 80 K were measured as a function of excitation energy by the fluorescence line narrowing (FLN) technique. The magnitudes of the splitting of the F-7(1) manifolds at lower excitation energies increased with increasing phosphate content. The relative intensity of D-5(0) --> F-7(2) to D-5(0) --> F-7(1) transitions increased by adding the phosphate compound. This increase decreased gradually with increasing excitation energy. The atomic structure around Eu3+ in these glasses was simulated using molecular dynamics techniques. The Stark splitting and the transition probabilities between D-5(0) and F-7(1) energy states at each simulated Eu3+ ion were calculated on the basis of the point-charge approximation. The predicted energy differences between D-5(0) and (F-7(2), F-7(1), and F-7(0)) energy levels agree within 100 cm(-1) with the observed ones. The transition probabilities are discussed in terms of the crystal field potential and the configuration interaction parameters, Xi(k,lambda). (C) 1997 Elsevier Science B.V.
引用
收藏
页码:212 / 220
页数:9
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