长余辉材料SrAl2O4 ∶ Eu,Dy中Eu的价态变化及对发光性能的影响

陈雪花; 胡义华; 王银海; 柳 成; 陈 仁; 廖 峰

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长余辉材料SrAl₂O₄ ∶ Eu,Dy中Eu的价态变化及对发光性能的影响

论文 | 更新时间：2020-08-12

- 长余辉材料SrAl₂O₄ ∶ Eu,Dy中Eu的价态变化及对发光性能的影响
- Valence-change of Eu and Its Effect on the Luminescent Properties of Long Afterglow Phosphor SrAl2O4∶Eu,Dy
- 发光学报 2009年30卷第1期页码：40-46
- 作者机构：
 
 广东工业大学物理与光电工程学院
- 作者简介：
- 基金信息：
- DOI：
 中图分类号： O482.31;O614.33
- 收稿：2008-05-22，
 
 修回：1900-1-2，
 
 网络首发：2009-02-20，
 
 纸质出版：2009-02-20
- 稿件说明：
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陈雪花, 胡义华, 王银海, 等. 长余辉材料SrAl₂O₄ ∶ Eu,Dy中Eu的价态变化及对发光性能的影响[J]. 发光学报, 2009,30(1):40-46.

CHEN Xue-hua, HU Yi-hua, WANG Yin-hai, et al. Valence-change of Eu and Its Effect on the Luminescent Properties of Long Afterglow Phosphor SrAl2O4∶Eu,Dy[J]. Chinese Journal of Luminescence, 2009, 30(1): 40-46.
陈雪花, 胡义华, 王银海, 等. 长余辉材料SrAl₂O₄ ∶ Eu,Dy中Eu的价态变化及对发光性能的影响[J]. 发光学报, 2009,30(1):40-46. DOI：

CHEN Xue-hua, HU Yi-hua, WANG Yin-hai, et al. Valence-change of Eu and Its Effect on the Luminescent Properties of Long Afterglow Phosphor SrAl2O4∶Eu,Dy[J]. Chinese Journal of Luminescence, 2009, 30(1): 40-46. DOI：

摘要

采用高温固相法

先在空气气氛下制备了SrAl

∶ Eu

后对其进行还原→氧化→还原处理。X射线衍射结果表明

经过还原→氧化→还原处理后样品的晶体结构没有改变。样品的发射光谱测试表明

在高温空气气氛下有少量的Eu

还原成Eu

。Eu

和Eu

有不同的发光特性

产生的是线状特征光谱

发射峰值在592

616 nm。Eu

产生的是带状光谱

带的中心位置在513 nm。经过还原处理的样品和经过氧化处理的样品相比

的浓度得到显著提高

而Eu

的浓度则急剧下降。对Eu

的氧化、Eu

的还原的机理进行了细致地讨论。另外

样品的热释光谱测试表明

经过氧化气氛处理和经过还原气氛处理过的样品的热释光峰值有很大的变化

但陷阱能级深度基本不变

在0.65 eV左右。这表明

对长余辉材料SrAl

∶ Eu

Dy进行还原→氧化→还原处理

Eu离子价态和发光强度会产生变化

并不影响其中Dy离子的陷阱能级。

Abstract

paper

关键词

Keywords

references

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