Luminescent Properties of Blue Emitting Long Afterglow Phosphors CaAl2O4:Eu2+,Li+

WAN Ying; HE Jiu-yang; MA Yuan-yuan; Ayituerxun·Abudoureyimu; Aierken·Sidike

doi:10.3788/fgxb20163702.0181

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Luminescent Properties of Blue Emitting Long Afterglow Phosphors CaAl₂O₄:Eu²⁺,Li⁺

更新时间：2020-08-12

- Luminescent Properties of Blue Emitting Long Afterglow Phosphors CaAl₂O₄:Eu²⁺,Li⁺
- Chinese Journal of Luminescence Vol. 37, Issue 2, Pages: 181-186(2016)
- 作者机构：
  
  新疆师范大学物理与电子工程学院, 新疆矿物发光材料及其微结构实验室,新疆乌鲁木齐,830054
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163702.0181
  CLC： O482.31
- Received：06 November 2015，
  
  Revised：18 November 2015，
  
  Published：10 February 2016
- 稿件说明：
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万英, 何久洋, 马媛媛等. 蓝色长余辉材料CaAl₂O₄:Eu²⁺,Li⁺的发光性质[J]. 发光学报, 2016,37(2): 181-186

WAN Ying, HE Jiu-yang, MA Yuan-yuan etc. Luminescent Properties of Blue Emitting Long Afterglow Phosphors CaAl₂O₄:Eu²⁺,Li⁺[J]. Chinese Journal of Luminescence, 2016,37(2): 181-186
万英, 何久洋, 马媛媛等. 蓝色长余辉材料CaAl₂O₄:Eu²⁺,Li⁺的发光性质[J]. 发光学报, 2016,37(2): 181-186 DOI： 10.3788/fgxb20163702.0181.

WAN Ying, HE Jiu-yang, MA Yuan-yuan etc. Luminescent Properties of Blue Emitting Long Afterglow Phosphors CaAl₂O₄:Eu²⁺,Li⁺[J]. Chinese Journal of Luminescence, 2016,37(2): 181-186 DOI： 10.3788/fgxb20163702.0181.

摘要

采用高温固相法制备了CaAl

:Eu

发光材料

并讨论了掺杂Li

对CaAl

:Eu

发光性质的影响。X 射线衍射(XRD)和PL测试分析表明

在CaAl

:Eu

中掺入Li

后

的发光有一定的增强

而余辉时间则延长了4倍左右。通过热释光谱测量

分析了其陷阱能级的数量并估算了陷阱能级深度。结果表明

掺杂Li

会在发光离子周围产生更多的电子陷阱

使陷阱的密度和深度增加

从而提高荧光粉的余辉性能。

Abstract

CaAl

:Eu

phosphors were synthesized by high temperature solid-state method. Influence of Li

doping on the luminescence properties of CaAl

:Eu

was studied. X-ray diffraction (XRD) and photoluminescence (PL) spectra analysis show that the luminescence intensity of CaAl

:Eu

is enhanced and the decay time of CaAl

:Eu

is increased approximately 4 times with the doping of Li

. By the use of thermo luminescence spectrum measurement

the number and the depth of trap level were analyzed. The doping of Li

can produce more electron traps around the luminescence ions

resulting the increase of the trap density and depth

so as to improve the afterglow properties of phosphor.

关键词

Keywords

references

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