Effect of Cu2+ ions on the photoluminescence characteristics of Ce4+-doped SrAl2O4
Effect of Cu2+ ions on the photoluminescence characteristics of Ce4+-doped SrAl2O4
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DOI：
10.1016/s0925-3467(02)00059-9
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发表时间：
2002-09-01
影响因子：
3.9
通讯作者：
Gu, F
中科院分区：
文献类型：
--
作者：
Yang, P;Lü, MK;Gu, F
在1200 ℃、弱氧化气氛下，采用固相反应法合成了Cu掺杂、Ce掺杂和Cu Ce掺杂的SrAl_2 O_4发光材料。在室温下研究了掺杂样品的光致发光和激发光谱。Ce ~（4+）掺杂的SrAl_2 O_4样品的激发光谱由两个尖锐的谱带组成，一个在紫外（381 nm），另一个在可见光（517 nm）。Ce ~（4+）掺杂的SrAl_2 O_4样品的光致发光谱随激发波长的变化而变化。由于Cu ~（2+）和Ce ~（4+）之间的能量传递，Cu ~（2+）和Ce ~（4+）共掺样品的荧光光谱和激发光谱与单掺样品有很大的不同。此外，共掺杂样品的PL谱随激发波长的不同而变化。(C)2002 Elsevier Science B. V.保留所有权利。
Cu-doped, Cc-doped and CuCe-doped SrAl2O4 luminescent materials have been synthesized by solid state reaction at 1200 degreesC and weak oxidation atmosphere. The photoluminescence (PL) and excitation spectra of the doped samples have been investigated at room temperature. The excitation spectrum of Ce4+-doped SrAl2O4 sample consists of two sharp bands, one in the ultraviolet (381 nm) and the other in the visible (517 nm) part of the spectrum. The PL spectra of Ce4+-doped SrAl2O4 sample vary with the changing of the excitation wavelength. Because of the energy transfer between Cu2+ and Ce4+, the PL and excitation spectra of the sample co-doped with Cu2+ and Ce4+ are dramatically different from that of Ce4+-doped sample. Also, the PL spectra of the co-doped sample change with using different excitation wavelength. (C) 2002 Elsevier Science B.V. All rights reserved.