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绿光SrAl2O4:Eu2+,Dy3+到近红外光LiGa5O8:Cr3+的余辉能量传递及近红外余辉增强
Enhancement of Near-infrared Afterglow by The Persistent Energy Transfer from SrAl2O4:Eu2+,Dy3+ to LiGa5O8:Cr3+
- 发光学报 2018年39卷第11期 页码：1496-1504
- 作者机构：
浙江工业大学 化学工程学院,浙江 杭州,310000
- 作者简介：
- 基金信息：国家自然科学基金（10804099）();浙江省自然科学基金重点项目（LZ18B050002）资助()
DOI：10.3788/fgxb20183911.1496
中图分类号： O482.31收稿日期：2018-02-07，
修回日期：2018-04-10，
网络出版日期：2018-05-09，
纸质出版日期：2018-11-05
- 稿件说明：
移动端阅览
潘再法, 金可燃, 严丽萍等. 绿光SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>,Dy<sup>3+</sup>到近红外光LiGa<sub>5</sub>O<sub>8</sub>:Cr<sup>3+</sup>的余辉能量传递及近红外余辉增强[J]. 发光学报, 2018,39(11): 1496-1504
PAN Zai-fa, JIN Ke-ran, YAN Li-ping etc. Enhancement of Near-infrared Afterglow by The Persistent Energy Transfer from SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>,Dy<sup>3+</sup> to LiGa<sub>5</sub>O<sub>8</sub>:Cr<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2018,39(11): 1496-1504
潘再法, 金可燃, 严丽萍等. 绿光SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>,Dy<sup>3+</sup>到近红外光LiGa<sub>5</sub>O<sub>8</sub>:Cr<sup>3+</sup>的余辉能量传递及近红外余辉增强[J]. 发光学报, 2018,39(11): 1496-1504 DOI： 10.3788/fgxb20183911.1496.
PAN Zai-fa, JIN Ke-ran, YAN Li-ping etc. Enhancement of Near-infrared Afterglow by The Persistent Energy Transfer from SrAl<sub>2</sub>O<sub>4</sub>:Eu<sup>2+</sup>,Dy<sup>3+</sup> to LiGa<sub>5</sub>O<sub>8</sub>:Cr<sup>3+</sup>[J]. Chinese Journal of Luminescence, 2018,39(11): 1496-1504 DOI： 10.3788/fgxb20183911.1496.
摘要
相较于蓝绿光长余辉材料，近红光长余辉材料不仅种类少，其性能也相对较差。本文探索基于余辉能量传递的机理，实现将绿光长余辉材料SrAl
2
O
4
:Eu
2+
，Dy
3+
的余辉能量传递给近红外光长余辉材料LiGa
5
O
8
:Cr
3+
，以此来增强LiGa
5
O
8
:Cr
3+
的余辉性能。实验首先采用高温固相法分别合成SrAl
2
O
4
:Eu
2+
，Dy
3+
和LiGa
5
O
8
:Cr
3+
，然后再按不同的质量比例混合均匀，最后测试混合材料的余辉光谱性能。实验结果表明，与SrAl
2
O
4
:Eu
2+
，Dy
3+
混合后，来自于LiGa
5
O
8
:Cr
3+
的718 nm近红外余辉增强；不同比例下混合后LiGa
5
O
8
:Cr
3+
的余辉光谱增强效果不一，其中两者比例为1:1时，能量传递效率最佳，LiGa
5
O
8
:Cr
3+
的余辉最强。最后在监测LiGa
5
O
8
:Cr
3+
的余辉718 nm的热释曲线中呈现了明显的SrAl
2
O
4
:Eu
2+
，Dy
3+
的热释峰，是两者之间存在能量传递的重要证据。该结果阐明了两种长余辉材料间余辉能量传递的可行性，为改善近红外长余辉材料余辉性能提供了一种有潜力的方法。
Abstract
Near-infrared persistent luminescent materials are catching extensive attention for their distinctive features in bio-imaging application. However
comparison with the excellent afterglow properties of green and blue persistent luminescent materials
the afterglow of near-infrared persistent luminescent material is urgent to be improved. This paper proposed a persistent energy transfer enhancement strategy to improve the near-infrared afterglow of LiGa
5
O
8
:Cr
3+
through the radiative energy transfer from SrAl
2
O
4
:Eu
2+
Dy
3+
to LiGa
5
O
8
:Cr
3+
. In this work
SrAl
2
O
4
:Eu
2+
Dy
3+
and LiGa
5
O
8
:Cr
3+
were synthesized by solid state reaction
and then the afterglow properties were characterized for the composites with various weight ratios. The results show that the near-infrared (718 nm) afterglow decay time of the SrAl
2
O
4
:Eu
2+
Dy
3+
/LiGa
5
O
8
:Cr
3+
composites became longer than pure LiGa
5
O
8
:Cr
3+
under the excitation of 348 nm. Moreover
the afterglow enhancement was different for various weight ratios composites. When the ratio was 1:1
the afterglow at 718 nm of LiGa
5
O
8
:Cr
3+
was strongest
indicating the most efficiency of energy transfer. In addition
the TL peaks belonging to SrAl
2
O
4
:Eu
2+
Dy
3+
were recorded in the TL curve
by monitoring at 718 nm. This is a substantial proof for the persistent energy transfer from SrAl
2
O
4
:Eu
2+
Dy
3+
to LiGa
5
O
8
:Cr
3+
. These results demonstrate the feasibility of the persistent energy transfer between two long afterglow luminescent materials
and provide a potential approach to improve the afterglow properties of near-infrared persistent luminescent materials.
关键词
Keywords
references
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