Adjusting luminescence properties of SrxCa1-xAl2O4: Eu2+, Dy3+ phosphors by Sr/Ca ratio

被引：0
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作者：
Liu, Cheng [1 ]
Wang, Yinhai [1 ]
Hu, Yihua [1 ]
Chen, Ren [1 ]
Liao, Feng [1 ]
机构：
[1] School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, China
来源：
Journal of Alloys and Compounds | 2009年 / 470卷 / 1-2期
关键词：
Long persistent phosphors SrxCa1-xAl2O4: Eu2+; Dy3+ (x = 0; 0.2; 0.4; 0.6; 0.8; 1.0) were prepared through a solution-combustion method at 600 °C. The phase structures of the phosphors were characterized by X-ray diffraction. The major phase was CaAl2O4 when x 2O4 phase as a minor phase; whereas the major phase was SrAl2O4 when x ≥ 0.8. The results indicated that the phase structure of the samples changed from CaAl2O4 to SrAl2O4 when x changed from 0 to 1.0. The emission colors changed accordingly from blue to green-blue and then to green in visible range; as evidenced from the emission spectra. The decay characteristics showed that the life times also varied with the value of x. These results revealed that the emission colors and life times can be adjusted by the value of x. Furthermore; the reason that the emission colors and decay times varied with x has been ascribed to the distortion of crystal lattice. © 2008 Elsevier B.V. All rights reserved;
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页码：473 / 476
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