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发光颜色可调的硅酸盐长余辉发光材料 Ba4(Si3O8)2∶Eu2+,Ce3+,Dy3+
Color Tunable Silicate Long-lasting Afterglow Phosphors: Ba4(Si3O8)2∶Eu2+,Ce3+,Dy3+
- 发光学报 2012年33卷第9期 页码：973-978
- 作者机构：
1. 兰州大学 物理科学与技术学院,甘肃 兰州,730000
2. 兰州军区 信息工程科技创新工作站,甘肃 兰州,730020
- 作者简介：
- 基金信息：国家自然科学基金(10874061)资助项目()
DOI：10.3788/fgxb20123309.0973
中图分类号： O482.31纸质出版日期：2012-9-10，
收稿日期：2012-5-17，
修回日期：2012-7-12，
扫 描 看 全 文
龚宇, 王明孝, 任建波, 王育华. 发光颜色可调的硅酸盐长余辉发光材料 Ba<sub>4</sub>(Si<sub>3</sub>O<sub>8</sub>)<sub>2</sub>∶Eu<sup>2+</sup>,Ce<sup>3+</sup>,Dy<sup>3+</sup>[J]. 发光学报, 2012,33(9): 973-978
GONG Yu, WANG Ming-xiao, REN Jian-bo, WANG Yu-hua. Color Tunable Silicate Long-lasting Afterglow Phosphors: Ba<sub>4</sub>(Si<sub>3</sub>O<sub>8</sub>)<sub>2</sub>∶Eu<sup>2+</sup>,Ce<sup>3+</sup>,Dy<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2012,33(9): 973-978
龚宇, 王明孝, 任建波, 王育华. 发光颜色可调的硅酸盐长余辉发光材料 Ba<sub>4</sub>(Si<sub>3</sub>O<sub>8</sub>)<sub>2</sub>∶Eu<sup>2+</sup>,Ce<sup>3+</sup>,Dy<sup>3+</sup>[J]. 发光学报, 2012,33(9): 973-978 DOI： 10.3788/fgxb20123309.0973.
GONG Yu, WANG Ming-xiao, REN Jian-bo, WANG Yu-hua. Color Tunable Silicate Long-lasting Afterglow Phosphors: Ba<sub>4</sub>(Si<sub>3</sub>O<sub>8</sub>)<sub>2</sub>∶Eu<sup>2+</sup>,Ce<sup>3+</sup>,Dy<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2012,33(9): 973-978 DOI： 10.3788/fgxb20123309.0973.
摘要
在还原气氛下利用高温固相法制备了Ba
3.982-
x
(Si
3
O
8
)
2
∶0.008Eu
2+
x
Ce
3+
0.01Dy
3+
系列样品。光谱分析表明
Ce
3+
进入到晶格中将取代不同Ba
2+
格位从而形成不同的发光中心。通过Ce
3+
→Eu
2+
的能量传递
得到了一系列发光颜色可调、余辉颜色为绿色的长余辉发光材料。Ce
3+
的掺入可以增大样品的余辉强度但是同时缩短了样品的余辉时间。热释光谱的分析表明
Ce
3+
的掺入可以同时增加浅陷阱T
1
和深陷阱T
3
的数量
深陷阱对载流子的再捕获效应导致了样品余辉强度的增大和余辉时间的缩短。
Abstract
Long afterglow phosphors Ba
3.982-
x
(Si
3
O
8
)
2
∶0.008Eu
2+
x
Ce
3+
0.01Dy
3+
were prepared by solid-state reactions under a weak reductive atmosphere. The photoluminescence spectra showed that two types of Ce
3+
centers existed in the Ba
4
(Si
3
O
8
)
2
lattice due to Ce
3+
could occupied two different Ba
2+
sites. Through the energy transfer between Ce
3+
and Eu
2+
multicolor fluorescence and green phosphorescence can be got. Co-doping of Ce
3+
can increase the afterglow intensity
however
decrease the duration of Ba
4
(Si
3
O
8
)
2
∶Eu
2+
Dy
3+
. Through the analysis of the thermoluminescence curves
the co-doped of Ce
3+
can increase the number of shallow (T
1
) and deep traps(T
3
). As the re-trapping of the deep trap
the duration of the phosphor decreased and the intensity of the afterglow increased.
关键词
长余辉颜色可调Ba4(Si3O8)2热释光
Keywords
long-lasting phosphorcolor tunableBa4(Si3O8)2thermoluminescence
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