PHOTOIONIZATION AND LUMINESCENCES IN BAF2-EU2+

被引：103
作者：
MOINE, B
PEDRINI, C
COURTOIS, B
机构：
[1] U.R.A. 442 du C.N.R.S., Université Lyon 1, 69622 Villeurbanne, 43 Bd. du
来源：
JOURNAL OF LUMINESCENCE | 1991年 / 50卷 / 01期
关键词：
D O I：
10.1016/0022-2313(91)90007-I
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The photoconductivity spectra of BaF2:Eu2+ shows that the "anomalous" emission usually observed in BaF2:Eu2+ is due to the fact that all the Eu2+ excited states are in the conduction band of the crystal. The red shifted emission is due to an impurity trapped exciton which is the lowest excited state of this system. A model for the photoconductive and luminescence behavior of BaF2:Eu2+ and SrF2:Eu2+ is given in terms of configuration coordinate diagrams. A broad blue band is also observed under high energy excitation (> 4 eV) and is interpreted as the emission of a perturbed self-trapped exciton.
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页码：31 / 38
页数：8
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