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1. 中国科学院长春应用化学研究所 稀土资源利用国家重点实验室, 吉林 长春 130022
2. 沈阳师范大学 化学与化工学院, 辽宁 沈阳 110034
纸质出版日期:2018-4-5,
网络出版日期:2017-8-21,
收稿日期:2017-7-11,
修回日期:2017-8-15,
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李佳钰, 庞然, 于湛等. 近紫外光激发黄色荧光粉Ba<sub>3</sub>Y<sub>4</sub>O<sub>9</sub>:Dy<sup>3+</sup>的制备及发光特性[J]. 发光学报, 2018,39(4): 515-522
LI Jia-yu, PANG Ran, YU Zhan etc. Preparation and Luminescence Properties of Yellow Phosphors Ba<sub>3</sub>Y<sub>4</sub>O<sub>9</sub>: Dy<sup>3+</sup> Excited by Near UV Light[J]. Chinese Journal of Luminescence, 2018,39(4): 515-522
李佳钰, 庞然, 于湛等. 近紫外光激发黄色荧光粉Ba<sub>3</sub>Y<sub>4</sub>O<sub>9</sub>:Dy<sup>3+</sup>的制备及发光特性[J]. 发光学报, 2018,39(4): 515-522 DOI: 10.3788/fgxb20183904.0515.
LI Jia-yu, PANG Ran, YU Zhan etc. Preparation and Luminescence Properties of Yellow Phosphors Ba<sub>3</sub>Y<sub>4</sub>O<sub>9</sub>: Dy<sup>3+</sup> Excited by Near UV Light[J]. Chinese Journal of Luminescence, 2018,39(4): 515-522 DOI: 10.3788/fgxb20183904.0515.
通过高温固相法合成了一系列Ba
3
Y
4-
x
O
9
:
x
Dy
3+
荧光粉材料。利用X射线粉末衍射、荧光光谱和荧光寿命对样品进行了表征。实验表明,样品的激发光谱由一系列线状峰组成,峰值分别位于328,355,368,386,427,456,471 nm。在355 nm激发下,荧光粉在490 nm(
4
F
9/2
6
H
15/2
)和580 nm(
4
F
9/2
6
H
13/2
)处有很强的发射,发射光谱的色坐标位于黄光区域。研究了不同Dy
3+
掺杂浓度对样品发光性质的影响,发现样品的发光随着Dy
3+
浓度的增大而增强,但光谱形状基本保持不变,表明Dy
3+
占据了基质中低对称性的Y
3+
格位。当Dy
3+
摩尔分数
x
=0.08时出现发光强度猝灭现象,浓度猝灭机理为电偶极-电偶极相互作用。样品的发光寿命随着Dy
3+
浓度的增大逐渐减小,进一步证明了Dy
3+
离子之间存在着能量传递现象。Ba
3
Y
4
O
9
:Dy
3+
荧光粉的发光位于黄光区域,有较好的热稳定性,是潜在的白光LED用荧光粉材料。
The phosphor Ba
3
Y
4-
x
O
9
:
x
Dy
3+
was synthesized by traditional high-temperature solid-state reaction method. The structure and luminescence properties were characterized using X-ray powder diffraction
photoluminescence spectra (PL) and fluorescence decay time. The results indicate that the excitation spectrum includes a series of linear peaks
located at 328
355
368
386
427
456
471 nm. The main emission peaks were located at 490 nm(
4
F
9/2
6
H
15/2
)and 580 nm(
4
F
9/2
6
H
13/2
) under 355 nm excitation. The chromaticity coordinates of Ba
3
Y
4
O
9
:Dy
3+
phosphors were measured
which were in the yellow region. The effect of the doping concentration of Dy
3+
was investigated
and found the samples of luminescence intensity increased with the increasing of the concentration of Dy
3+
but the spectral shape basic remains the same. This indicates that Dy
3+
occupies the Y
3+
position of low symmetry in the matrix. The concentration quenching occurred when
x
=0.08 for Ba
3
Y
4-
x
O
9
:
x
Dy
3+
phosphor and its mechanism is ascribed to dipole-dipole interaction. The decay time of the phosphor decreases with the increase of Dy
3+
-doped concentrations
this is further evidence that there exists a phenomenon of energy transfer between the Dy
3+
ions. Ba
3
Y
4
O
9
:Dy
3+
phosphors are located in the yellow region and have good thermal stability.
Ba3Y4O9黄光荧光材料光谱性质
Ba3Y4O9yellow lightfluorescent materialoptical properties
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