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La2-x-yMgTiO6:xDy3+,yEu3+白色荧光粉的荧光性能及能量传递
Luminescent Properties and Energy Transfer of La2-x-yMgTiO6: xDy3+,yEu3+ White Phosphors
- 发光学报 2019年40卷第6期 页码：713-718
- 作者机构：
西安建筑科技大学 理学院, 陕西 西安 710055
- 作者简介：
- 基金信息：陕西省自然科学基金（2018JM2022）资助项目()
DOI：10.3788/fgxb20194006.0713
中图分类号： O614.33+1;O614.342纸质出版日期：2019-6-5，
网络出版日期：2018-11-5，
收稿日期：2018-8-14，
修回日期：2018-10-22，
扫 描 看 全 文
谢会东, 谭玉荣, 苏彬彬等. La<sub>2-<em>x-y</em></sub>MgTiO<sub>6</sub>:<em>x</em>Dy<sup>3+</sup>,<em>y</em>Eu<sup>3+</sup>白色荧光粉的荧光性能及能量传递[J]. 发光学报, 2019,40(6): 713-718
XIE Hui-dong, TAN Yu-rong, SU Bin-bin etc. Luminescent Properties and Energy Transfer of La<sub>2-<em>x-y</em></sub>MgTiO<sub>6</sub>: <em>x</em>Dy<sup>3+</sup>,<em>y</em>Eu<sup>3+</sup> White Phosphors[J]. Chinese Journal of Luminescence, 2019,40(6): 713-718
谢会东, 谭玉荣, 苏彬彬等. La<sub>2-<em>x-y</em></sub>MgTiO<sub>6</sub>:<em>x</em>Dy<sup>3+</sup>,<em>y</em>Eu<sup>3+</sup>白色荧光粉的荧光性能及能量传递[J]. 发光学报, 2019,40(6): 713-718 DOI： 10.3788/fgxb20194006.0713.
XIE Hui-dong, TAN Yu-rong, SU Bin-bin etc. Luminescent Properties and Energy Transfer of La<sub>2-<em>x-y</em></sub>MgTiO<sub>6</sub>: <em>x</em>Dy<sup>3+</sup>,<em>y</em>Eu<sup>3+</sup> White Phosphors[J]. Chinese Journal of Luminescence, 2019,40(6): 713-718 DOI： 10.3788/fgxb20194006.0713.
摘要
采用高温固相法合成了La
2-
x
MgTiO
6
:
x
Dy
3+
和La
2-
x-y
MgTiO
6
:
x
Dy
3+
，
y
Eu
3+
系列荧光粉，通过X射线衍射对其相结构进行了表征，优化了荧光粉的组成，研究了Dy
3+
和Eu
3+
浓度对发光强度的影响，测试了荧光粉的荧光光谱和寿命，研究了Dy
3+
和Eu
3+
之间的能量传递机理和能量传递效率。结果表明:所有合成的掺杂荧光粉均为单相物质；La
2-
x
MgTiO
6
:
x
Dy
3+
最佳掺杂浓度为
x
=0.05；在350 nm近紫外光激发下，La
2-
x-y
MgTiO
6
:
x
Dy
3+
，
y
Eu
3+
显示出Dy
3+
的特征黄、蓝光发射和Eu
3+
的特征红光发射；Dy
3+
的荧光寿命呈双指数衰减，随着Eu
3+
浓度的增大，Dy
3+
的荧光寿命逐渐减小，证明了Dy
3+
和Eu
3+
离子之间存在着能量传递；能量传递效率随着Eu
3+
掺杂浓度的增加而增加，La
1.83
MgTiO
6
:0.05Dy
3+
，0.12Eu
3+
荧光粉的能量传递效率为53.9%；改变调节Eu
3+
的掺杂浓度可以得到从冷白色到暖白色的荧光粉，La
1.83
MgTiO
6
:0.05Dy
3+
，0.12Eu
3+
的色坐标为（0.337 3，0.354 4）。
Abstract
A series of La
2-
x
MgTiO
6
:
x
Dy
3+
and La
2-
x-y
MgTiO
6
:
x
Dy
3+
y
Eu
3+
phosphors were synthesized by high temperature solid-state method. The phase of the products was determined by X-ray diffraction meter and the composition of the phosphors was optimized. The influence of the concentration of Dy
3+
and Eu
3+
on the luminescence intensity was studied. The fluorescence spectra and fluorescence lifetime of the phosphors were tested. The energy transfer mechanism and energy transfer efficiency between Dy
3+
and Eu
3+
were studied. The results showed that all the as-synthesized doped phosphors were of single phase. The optimum doping concentration of Dy
3+
in La
2-
x
MgTiO
6
:
x
Dy
3+
was
x
=0.05. The La
2-
x-y
MgTiO
6
:
x
Dy
3+
y
Eu
3+
phosphors exhibited yellow and blue emissions of Dy
3+
and characteristic emissions of Eu
3+
upon 350 nm near ultraviolet light excitation. The fluorescence lifetime decay of Dy
3+
was double exponential and it decreased with the increase of the concentration of Eu
3+
which showed the occurrence of an energy transfer between Dy
3+
and Eu
3+
. The energy transfer efficiency increased with the increase of the concentration of Eu
3+
which was 53.9% for La
1.83
MgTiO
6
:0.05Dy
3+
0.12Eu
3+
. By adjusting the concentration of Dy
3+
and Eu
3+
the phosphor realized the emission from cold-white-light to warm-white-light. The chromaticity coordinates of La
1.83
MgTiO
6
:0.05Dy
3+
0.12Eu
3+
were (0.3373
0.3544).
关键词
发光二极管白色荧光粉双钙钛矿钛酸盐
Keywords
LEDwhite phosphordouble perovskitetitanate
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