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大连工业大学 光子学研究所,辽宁 大连,116034
纸质出版日期:2018-10-5,
网络出版日期:2018-5-21,
收稿日期:2018-1-8,
修回日期:2018-3-22,
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董超, 程志远, 宁宏宇等. Ba<sub>3</sub>WO<sub>6</sub>:Eu<sup>3+</sup>红色荧光粉的结构及其发光特性[J]. 发光学报, 2018,39(10): 1365-1370
DONG Chao, CHENG Zhi-yuan, NING Hong-yu etc. Structure and Luminescence of Red Phosphor Ba<sub>3</sub>WO<sub>6</sub>: Eu<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2018,39(10): 1365-1370
董超, 程志远, 宁宏宇等. Ba<sub>3</sub>WO<sub>6</sub>:Eu<sup>3+</sup>红色荧光粉的结构及其发光特性[J]. 发光学报, 2018,39(10): 1365-1370 DOI: 10.3788/fgxb20183910.1365.
DONG Chao, CHENG Zhi-yuan, NING Hong-yu etc. Structure and Luminescence of Red Phosphor Ba<sub>3</sub>WO<sub>6</sub>: Eu<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2018,39(10): 1365-1370 DOI: 10.3788/fgxb20183910.1365.
以高温固相法成功合成了一系列Eu
3+
离子激活Ba
3
WO
6
红色荧光粉。分别采用X射线衍射(XRD)和荧光光谱(FL)对样品的晶体结构和发光性能进行了表征。结果表明,样品均具有立方晶系的双钙钛矿结构;Eu
3+
离子的激发谱由一个宽带(包括Eu
3+
-O
2-
和W
6+
-O
2-
电荷转移带)和若干个窄峰(4f-4f电子跃迁)组成,而跃迁
5
D
0
7
F
1
和
5
D
0
7
F
2
则构成了发射谱的主要部分。调整原材料中BaCO
3
和WO
3
的量的比,XRD的主衍射峰位发生红移至与标准谱完全吻合,发光强度有所提升并分析了原因。Eu
3+
离子的临界摩尔分数为0.05,临界距离(
R
c
)为1.263 4 nm。在314 nm或394 nm激发光下,样品发出红光(
max
=596 nm),色坐标为(0.618,0.342),在LED照明、显示等领域具备一定潜力。
A series of Eu
3+
activated Ba
3
WO
6
red phosphors were synthesized by high temperature solid state method. The structure and luminescence properties were characterized by XRD and FL
respectively. The results show that all samples have the cubic double-perovskite structure. The excitation spectrum of Eu
3+
is consisted of a broad band including the Eu
3+
-O
2-
and W
6+
-O
2-
charge transfer bands and several peaks due to 4f-4f transitions of Eu
3+
. The emission spectrum is majorly consisted of transitions
5
D
0
7
F
1
and
5
D
0
7
F
2
. By adjusting the mole ratio of BaCO
3
and WO
3
the peaks of XRD are red shifted and accorded with the standard
the luminescence intensity is promoted. The critical mole fraction of Eu
3+
is 0.05 and the critical distance(
R
c
) is 1.263 4 nm. Under 314 or 394 nm excitation
the samples can emit red light(
max
=596 nm) with CIE color coordinates around (0.618
0.342)
suggesting the synthesized phosphors as promising candidate in the LED lighting and display fields.
Ba3WO6:Eu3+红色荧光粉Ba2格位
Ba3WO6:Eu3+red phosphorBa2 lattice site
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