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Optical properties of long-lasting phosphorescent crystals Ce3+-doped Ca2Al2SiO7 and CaYAl3O7
被引:96
作者:
Kodama, N
Tanii, Y
Yamaga, M
机构:
[1] Akita Univ, Dept Mat Sci & Engn, Fac Engn & Resource Sci, Akita 0108502, Japan
[2] Gifu Univ, Dept Elect, Gifu 5011193, Japan
关键词:
long-lasting phosphors;
Ce3+ ions;
melilite crystals;
D O I:
10.1016/S0022-2313(99)00543-8
中图分类号:
O43 [光学];
学科分类号:
070207 ;
0803 ;
摘要:
UV excitation of Ce3+-doped melilite crystals Ca2Al2SiO7 and CaYAl3O7 produces long-lasting phosphorescence besides intrinsic Ce3+ luminescence with lifetime of 40 ns. The intensity of the phosphorescence was measured as functions of temperature and time. The temperature dependence of the intensity integrated in time domain supports the upward-hopping mechanism of the trapped electron and the recombination of electron and hole at localized hole sites Ce4+. (C) 2000 Published by Elsevier Science B.V. All rights reserved.
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页码:1076 / 1078
页数:3
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