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1. 中国地质大学 材料与化学学院,湖北 武汉,430074
2. 武汉科技大学 城市学院, 湖北 武汉 430083
3. 华中科技大学 管理学院, 湖北 武汉 430074
收稿日期:2013-07-03,
修回日期:2013-08-30,
纸质出版日期:2013-11-10
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雷志高, 常天赐, 崔佳萌, 陈骏飞, 肖颖, 孟大维, 邹锴, 吴秀玲. ZnAl<sub>2</sub>O<sub>4</sub>:Tb<sup>3+</sup>荧光粉的合成、结构及其光学性能研究[J]. 发光学报, 2013,34(11): 1446-1450
LEI Zhi-gao, CHANG Tian-ci, CUI Jia-meng, CHEN Jun-fei, XIAO Ying, MENG Da-wei, ZOU Kai, WU Xiu-ling. Synthesis, Structure and Optical Property of ZnAl<sub>2</sub>O<sub>4</sub>:Tb<sup>3+</sup> Phosphor[J]. Chinese Journal of Luminescence, 2013,34(11): 1446-1450
雷志高, 常天赐, 崔佳萌, 陈骏飞, 肖颖, 孟大维, 邹锴, 吴秀玲. ZnAl<sub>2</sub>O<sub>4</sub>:Tb<sup>3+</sup>荧光粉的合成、结构及其光学性能研究[J]. 发光学报, 2013,34(11): 1446-1450 DOI: 10.3788/fgxb20133411.1446.
LEI Zhi-gao, CHANG Tian-ci, CUI Jia-meng, CHEN Jun-fei, XIAO Ying, MENG Da-wei, ZOU Kai, WU Xiu-ling. Synthesis, Structure and Optical Property of ZnAl<sub>2</sub>O<sub>4</sub>:Tb<sup>3+</sup> Phosphor[J]. Chinese Journal of Luminescence, 2013,34(11): 1446-1450 DOI: 10.3788/fgxb20133411.1446.
通过溶胶-凝胶法制备出不同Tb
3+
掺杂浓度和不同二次煅烧温度下的ZnAl
2
O
4
:Tb
3+
荧光粉
并利用X射线衍射(XRD)和荧光光谱等对样品进行了表征。由XRD结果可知
当Tb
3+
掺杂的摩尔分数不大于9%
二次煅烧温度在600℃以上时
所得粉体为结晶性良好的尖晶石相。在紫外光激发下
ZnAl
2
O
4
:Tb
3+
荧光粉的发射光谱由位于488 nm(
5
D
4
7
F
6
)、542 nm(
5
D
4
7
F
5
)、587 nm(
5
D
4
7
F
4
)和621.5 nm(
5
D
4
7
F
3
)的4个发射峰组成。研究发现
Tb
3+
的掺杂浓度和二次煅烧温度对样品发光强度有着重要影响
当Tb
3+
的摩尔分数为5%
二次煅烧温度为900℃时
ZnAl
2
O
4
:Tb
3+
荧光粉的发光最强
继续增加Tb
3+
掺杂浓度或提高煅烧温度
分别会出现浓度猝灭和温度猝灭现象。
The ZnAl
2
O
4
:Tb
3+
phosphor powders were synthesized by sol-gel method with different doping concentrations of Tb
3+
and secondary calcination temperatures. Then they were characterized by X-ray diffraction (XRD) and photoluminescence (PL). The XRD patterns show that the pure spinel phase of high crystallinity can be obtained when the mole fraction of Tb
3+
is less than 9% and the secondary calcination temperature exceeds 600℃. Under the excitation of ultraviolet light
the emission spectra of ZnAl
2
O
4
:Tb
3+
phosphor consists of four peaks locating at 488 nm (
5
D
4
7
F
6
)
542 nm (
5
D
4
7
F
5
)
587 nm (
5
D
4
7
F
4
)
and 621.5 nm (
5
D
4
7
F
3
). The influence of Tb
3+
concentration and secondary calcination temperature on the luminescence intensity was significant. The photoluminescence spectra intensity of ZnAl
2
O
4
:Tb
3+
is the strongest when the mole fraction of Tb
3+
is 5% and the secondary calcination temperature is 900℃. When the mole fraction of Tb
3+
and the secondary calcination temperature increase excessively
concentration quenching and temperature quenching appear
respectively.
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