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1. 安徽工业大学 材料科学与工程学院,安徽 马鞍山,243002
2. 安徽工业大学 数理科学与工程学院,安徽 马鞍山,243032
纸质出版日期:2017-3-5,
收稿日期:2016-9-26,
修回日期:2016-11-13,
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李中元, 李勇, 夏爱林. Eu<sup>3+</sup>掺杂的Na<sub>2</sub>YMg<sub>2</sub>(VO<sub>4</sub>)<sub>3</sub>荧光粉制备和发光特性[J]. 发光学报, 2017,38(3): 296-302
LI Zhong-yuan, LI Yong, XIA Ai-lin. Synthesis and Luminescent Properties of Eu<sup>3+</sup> Doped Na<sub>2</sub>YMg<sub>2</sub> (VO<sub>4</sub>)<sub>3</sub> Phosphors[J]. Chinese Journal of Luminescence, 2017,38(3): 296-302
李中元, 李勇, 夏爱林. Eu<sup>3+</sup>掺杂的Na<sub>2</sub>YMg<sub>2</sub>(VO<sub>4</sub>)<sub>3</sub>荧光粉制备和发光特性[J]. 发光学报, 2017,38(3): 296-302 DOI: 10.3788/fgxb20173803.0296.
LI Zhong-yuan, LI Yong, XIA Ai-lin. Synthesis and Luminescent Properties of Eu<sup>3+</sup> Doped Na<sub>2</sub>YMg<sub>2</sub> (VO<sub>4</sub>)<sub>3</sub> Phosphors[J]. Chinese Journal of Luminescence, 2017,38(3): 296-302 DOI: 10.3788/fgxb20173803.0296.
采用溶胶-凝胶法制备了Na
2
Y
1-
x
Mg
2
(VO
4
)
3
:
x
Eu
3+
(
x
=0.15~0.75)系列自激活荧光粉。用XRD、SEM、光致发光光谱和荧光衰减曲线分别对其结构、形貌和发光性能进行表征。XRD结果显示样品为纯石榴石结构,其中Eu
3+
取代Y
3+
;SEM照片显示样品为粒径大小在0.3~1 m范围内不规则的光滑球状颗粒;光谱分析表明,Na
2
YMg
2
(VO
4
)
3
作为自激活发光基质可以被200~400 nm紫外光有效激发,发出源于VO
4
3-
电荷迁移跃迁的波长范围为400~700 nm的宽谱带绿光。掺杂Eu
3+
后,在340 nm紫外光激发下同时出现了VO
4
3-
的电荷迁移带和Eu
3+
的特征光谱。不同浓度Eu
3+
掺杂的光谱和荧光衰减曲线表明,存在VO
4
3-
和Eu
3+
之间的能量传递。
A series of self-activated vanadate phosphors Na
2
Y
1-
x
Mg
2
(VO
4
)
3
:
x
Eu
3+
(
x
=0.15-0.75) were prepared by sol-gel method. The phase formation
surface morphology and luminescence properties of the samples were verified by XRD
SEM
photoluminescence spectra and decay curves. It is found that the obtained samples are pure crystalline phases with garnet structure. The particles with a diameter ranging from 0.3 to 1 m show irregular shapes and have a tendency to be agglomerating. This host can be excited by ultraviolet (UV) light
and it exhibits a broad-band green emission in the region from 400 to 700 nm
ascribing to the charge transfer of VO
4
3-
groups. Na
2
YMg
2
(VO
4
)
3
:Eu
3+
phosphors show both characteristic broad-band emission from VO
4
3-
groups and sharp emissions from Eu
3+
ions upon 340 nm UV light. Moreover
the intensities of host and Eu
3+
emission depend on the doping concentration of Eu
3+
. The energy transfer from VO
4
3-
to Eu
3+
was discussed based on spectrum analysis and decay curves.
自激活Na2YMg2(VO4)3:Eu3+能量传递荧光寿命
self-activatedNa2YMg2 (VO4)3:Eu3+energy transferfluorescence lifetime
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