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Na4Ca3(AlO2)10∶Eu2+,Mn2+荧光粉的发光特性
Photoluminescence Characteristics of Na4Ca3(AlO2)10∶Eu2+,Mn2+
- 发光学报 2011年32卷第11期 页码：1109-1114
- 作者机构：
延边大学理学院 物理系, 吉林 延吉,133002
- 作者简介：
- 基金信息：
DOI：
中图分类号： O482.31收稿日期：2011-04-06，
修回日期：2011-06-23，
网络出版日期：2011-11-22，
纸质出版日期：2011-11-22
- 稿件说明：
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王雪, 田莲花. Na<sub>4</sub>Ca<sub>3</sub>(AlO<sub>2</sub>)<sub>10</sub>∶Eu<sup>2+</sup>,Mn<sup>2+</sup>荧光粉的发光特性[J]. 发光学报, 2011,32(11): 1109-1114
WANG Xue, TIAN Lian-hua. Photoluminescence Characteristics of Na<sub>4</sub>Ca<sub>3</sub>(AlO<sub>2</sub>)<sub>10</sub>∶Eu<sup>2+</sup>,Mn<sup>2+</sup>[J]. Chinese Journal of Luminescence, 2011,32(11): 1109-1114
王雪, 田莲花. Na<sub>4</sub>Ca<sub>3</sub>(AlO<sub>2</sub>)<sub>10</sub>∶Eu<sup>2+</sup>,Mn<sup>2+</sup>荧光粉的发光特性[J]. 发光学报, 2011,32(11): 1109-1114 DOI：
WANG Xue, TIAN Lian-hua. Photoluminescence Characteristics of Na<sub>4</sub>Ca<sub>3</sub>(AlO<sub>2</sub>)<sub>10</sub>∶Eu<sup>2+</sup>,Mn<sup>2+</sup>[J]. Chinese Journal of Luminescence, 2011,32(11): 1109-1114 DOI：
摘要
采用高温固相法
制得一种新型荧光粉Na
4
Ca
3
(AlO
2
)
10
∶Eu
2+
Mn
2+
。样品的结构和发光性质分别由X射线衍射谱和荧光光谱来表征。在Na
4
Ca
3
(AlO
2
)
10
∶Eu
2+
的激发光谱中出现了Eu
2+
的f-d跃迁吸收带;在发射光谱中
出现蓝光发射
峰值位于441 nm。当在Na
4
Ca
3
(AlO
2
)
10
∶Eu
2+
中掺杂Mn
2+
时
发生了Eu
2+
Mn
2+
的能量传递
在542 nm处出现了Mn
2+
的发射峰。在Na
4
Ca
3
(AlO
2
)
10
∶Eu
2+
Mn
2+
中
随着Mn
2+
浓度的增加
Eu
2+
粒子的发射强度减弱
而Mn
2+
粒子的发射强度增强
且Eu
2+
离子发射的衰减时间缩短
同时色度由蓝光移向白光。
Abstract
A novel phosphor Na
4
Ca
3
(AlO
2
)
10
∶Eu
2+
was prepared by solid state reaction method in a thermal-carbon reducing atmosphere. The photoluminescence(PL) properties were investigated in this paper. The excitation spectrum of Na
4
Ca
3
(AlO
2
)
10
∶Eu
2+
showed two absorption bands centered at 262 nm and 320 nm respectively. The photoluminescence spectrum of Na
4
Ca
3
(AlO
2
)
10
∶Eu
2+
exhibited a single emission peak centered at 441 nm
which could be attributed to 5d-4f transition of Eu
2+
. The excitation spectrum of Na
4
Ca
3
-(AlO
2
)
10
∶Mn
2+
showed absorption peak at about 440 nm monitoring at 542 nm
which shows spectral overlap between emission spectrum of Na
4
Ca
3
(AlO
2
)
10
∶Eu
2+
. Co-doped Mn
2+
with Eu
2+
the photoluminescence spectra of Na
4
Ca
3
(AlO
2
)
10
∶Eu
2+
Mn
2+
were observed two peaks centered at 441 nm and 542 nm correspon-ding to the 5d-4f transition of Eu
2+
and the d-d transition of Mn
2+
respectively. With increasing the concentration of Mn
2+
the emission intensity of 5d-4f transition of Eu
2+
at 441 nm was significantly decreased
whereas the d-d transition of Mn
2+
at 542 nm was found to increase. The decay lifetime for Eu
2+
was found to decrease with increasing Mn
2+
dopant content
which was strong evidence for the energy transfer from Eu
2+
to Mn
2+
. We were also interested in investigating the energy transfer efficiency
T
of Eu
2+
Mn
2+
. With increasing Mn
2+
dopant content
the energy transfer efficiency
T
was found to increase gradually. According to the Dexter's energy transfer formula of multipolar interaction
it was demonstrated that the energy transfer from Eu
2+
to Mn
2+
was due to the electric quadripole-quadripole interaction of the resonance transfer. According to the CIE chromaticity coordinates of Na
4
Ca
3
(AlO
2
)
10
∶Eu
2+
x
Mn
2+
it was clearly observed that the CIE chromaticity coordinates with the increase of Mn content shifted from blue region to white region.
关键词
Keywords
references
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