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硅酸盐建筑材料国家重点实验室 武汉理工大学, 湖北 武汉 430070
纸质出版日期:2017-8-5,
收稿日期:2017-1-25,
修回日期:2017-3-9,
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阮威威, 刘志国, 刘成振等. Eu<sup>3+</sup>离子激活荧光粉Ca<sub>1.9</sub> Eu<sub>0.1</sub> NaMg<sub>2-<em>x</em></sub> Zn<sub><em>x</em></sub>(VO<sub>4</sub>)<sub>3</sub>(0 &le; <em>x</em> &le; 1)的发光性质[J]. 发光学报, 2017,38(8): 995-1002
RUAN Wei-wei, LIU Zhi-guo, LIU Cheng-zhen etc. Photoluminescence Properties of Eu<sup>3+</sup>-activated Ca<sub>1.9</sub> Eu<sub>0.1</sub> NaMg<sub>2-<em>x</em></sub> Zn<sub><em>x</em></sub>(VO<sub>4</sub>)<sub>3</sub>(0 &le; <em>x</em> &le; 1.0) Phosphor[J]. Chinese Journal of Luminescence, 2017,38(8): 995-1002
阮威威, 刘志国, 刘成振等. Eu<sup>3+</sup>离子激活荧光粉Ca<sub>1.9</sub> Eu<sub>0.1</sub> NaMg<sub>2-<em>x</em></sub> Zn<sub><em>x</em></sub>(VO<sub>4</sub>)<sub>3</sub>(0 &le; <em>x</em> &le; 1)的发光性质[J]. 发光学报, 2017,38(8): 995-1002 DOI: 10.3788/fgxb20173808.0995.
RUAN Wei-wei, LIU Zhi-guo, LIU Cheng-zhen etc. Photoluminescence Properties of Eu<sup>3+</sup>-activated Ca<sub>1.9</sub> Eu<sub>0.1</sub> NaMg<sub>2-<em>x</em></sub> Zn<sub><em>x</em></sub>(VO<sub>4</sub>)<sub>3</sub>(0 &le; <em>x</em> &le; 1.0) Phosphor[J]. Chinese Journal of Luminescence, 2017,38(8): 995-1002 DOI: 10.3788/fgxb20173808.0995.
采用固相反应法合成了Eu
3+
离子激活的Ca
1.9
Eu
0.1
NaMg
2-
x
Zn
x
(VO
4
)
3
(0
x
1),并研究了其发光和热猝灭性能。经粉末X射线衍射确认,反应产物由目标相和微量杂质相EuVO
4
构成。在355 nm激发下,样品中均能同时观察到来自[VO
4
]
3-
基团和Eu
3+
离子的特征发光。研究结果表明:随着
x
值的增加,上述两种发光的强度均先增加后降低;而它们的最强激发峰位置由347 nm逐渐地红移至356 nm,Stokes位移也逐渐地减小。这种现象应归因于Zn3d轨道和O2p轨道间很强的轨道杂化效应,这种效应随着
x
值的增加而逐渐增强。此外,Eu
3+
离子荧光发射强度最大值对应的
x
值与自激活荧光的不同。当
x
=1.0时,两者的相对强度差别最大。经荧光热猝灭测试确认,上述现象是由样品中的自激活荧光表现出比Eu
3+
离子荧光更严重的荧光热猝灭造成的。因而,在紫外光激发下,样品发出荧光的颜色具有温度敏感性。
Eu
3+
-activated Ca
1.9
Eu
0.1
NaMg
2-
x
Zn
x
(VO
4
)
3
(0
x
1) were synthesized by solid-state reaction route
and their photoluminescence and thermal quenching properties were studied. The samples were verified through powder X-ray diffraction
and the target phase was identified with tiny impurity of EuVO
4
in the obtained product. Excited by 355 nm
all the samples show the characteristic emissions from[VO
4
]
3-
group and Eu
3+
ion. With the increment of
x
value
the intensity of either of the above mentioned emissions increases at first and then decreases
while a red-shifting excitation peak from 347 nm to 356 nm and a decreasing Stokes-shift can be observed. Stronger hybridization effect occurres between the Zn3d orbital and the O2p orbital resulted by the increasing
x
value which is supposed to be responsible for that phenomena. Furthermore
the
x
value corresponding to the observed intensity maximum for Eu
3+
emission is different from the one for self-activated emission. Their highest difference is observed in the sample of
x
=1.0. It could be due to an apparently more serious thermal quenching of self-activated emission than that of Eu
3+
ion emission. Then
a temperature-sensitive color of the emission is also observed in the samples excited by the near ultraviolet light.
荧光粉碱土钒酸盐自激活荧光Eu3+离子荧光热猝灭
phosphoralkaline earth vanadateself-activated emissionEu3+ ionphotoluminescence thermal quenching
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