Adjusting luminescence properties of SrxCa1−xAl2O4: Eu2+, Dy3+ phosphors by Sr/Ca ratio
Adjusting luminescence properties of SrxCa1−xAl2O4: Eu2+, Dy3+ phosphors by Sr/Ca ratio
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DOI：
10.1016/j.jallcom.2008.03.001
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发表时间：
2009-02
影响因子：
6.2
通讯作者：
Cheng Liu;Yinhai Wang;Yihua Hu;Ren Chen;Feng Liao
中科院分区：
文献类型：
--
作者：
Cheng Liu;Yinhai Wang;Yihua Hu;Ren Chen;Feng Liao
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 CaAl2O4when x<0.8 with SrAl2O4phase as a minor phase, whereas the major phase was SrAl2O4when x≥0.8. The results indicated that the phase structure of the samples changed from CaAl2O4to SrAl2O4when 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.
