Stationary and time dependent PL emission of v-SiO2 in the UV range

被引:13
作者
Cannas, M [1 ]
Boscaino, R [1 ]
Gelardi, FM [1 ]
Leone, M [1 ]
机构
[1] UNIV PALERMO,IST FIS,I-90123 PALERMO,ITALY
关键词
D O I
10.1016/S0022-3093(97)00121-X
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 photoluminescence in vitreous-SiO2 in the 4.0 to 4.5 eV region has been investigated by exciting with UV and vacuum-UV photons. Two emission bands, alpha(E) and alpha(I), centered at 4.26 and 4.42 eV respectively, are detected. They have distinct features: alpha(E) has an excitation profile extending from 7.0 to 8.2 eV and decays with a lifetime of 5.5 ns; alpha(I), has an excitation maximum at 6.8 eV and a decay time of 4.1 ns. The centers responsible for these optical activities are discussed, also on the basis of their behaviour under gamma-irradiation. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:99 / 104
页数:6
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