Long-persistent Luminescent Properties of SrAl2O4 ∶ Eu2+ ,Dy3+ Doped with Yb3+ and Er3+

HAO Hong-chen; CHEN Bin; ZHU Jiang; LU Ming

doi:10.3788/fgxb20113204.0319

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Long-persistent Luminescent Properties of SrAl₂O₄ ∶ Eu²⁺ ,Dy³⁺ Doped with Yb³⁺ and Er³⁺

paper | 更新时间：2020-08-12

- Long-persistent Luminescent Properties of SrAl₂O₄ ∶ Eu²⁺ ,Dy³⁺ Doped with Yb³⁺ and Er³⁺
- Chinese Journal of Luminescence Vol. 32, Issue 4, Pages: 319-324(2011)
- 作者机构：
  
  1. 复旦大学物理系, 上海 200433
  2. 复旦大学光科学与工程系上海,200433
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20113204.0319
  CLC： O482.31
- Received：03 September 2010，
  
  Revised：26 October 2010，
  
  Published Online：22 April 2011，
  
  Published：22 April 2011
- 稿件说明：
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郝洪辰, 陈斌, 朱江, 陆明. Yb3+ ,Er3+掺杂的SrAl2O4 ∶ Eu2+ ,Dy3+ 长余辉材料的发光特性[J]. 发光学报, 2011,32(4): 319-324

HAO Hong-chen, CHEN Bin, ZHU Jiang, LU Ming. Long-persistent Luminescent Properties of SrAl2O4 ∶ Eu2+ ,Dy3+ Doped with Yb3+ and Er3+[J]. Chinese Journal of Luminescence, 2011,32(4): 319-324
郝洪辰, 陈斌, 朱江, 陆明. Yb3+ ,Er3+掺杂的SrAl2O4 ∶ Eu2+ ,Dy3+ 长余辉材料的发光特性[J]. 发光学报, 2011,32(4): 319-324 DOI： 10.3788/fgxb20113204.0319.

HAO Hong-chen, CHEN Bin, ZHU Jiang, LU Ming. Long-persistent Luminescent Properties of SrAl2O4 ∶ Eu2+ ,Dy3+ Doped with Yb3+ and Er3+[J]. Chinese Journal of Luminescence, 2011,32(4): 319-324 DOI： 10.3788/fgxb20113204.0319.

摘要

根据Dorenbos能级模型的推论

利用掺杂Yb

和Er

对典型的长余辉材料SrAl

∶ Eu

(简称SAO ∶ ED)的发光特性(发光强度和余辉时间)进行调制。在发光特性分析中

发展并使用了一种简便易行的解析模型

而不是常用的多项e指数衰减函数的经验模型。研究发现

正如Dorenbos所预言的

掺杂确实能够提高SAO ∶ ED的发光强度;但进一步研究发现

不完全是发光中心

而是一种辅助激发中心。Er

掺杂效果也和Dorenbos的预言相同

即它是一种俘获中心;但是当Er

和Yb

共掺杂时

却有一种脱俘作用

使得初始发光强度增强

衰减常数变小

但蓄光能力变化不大。

Abstract

The long-persistent properties of the phosphor SrAl

∶ Eu

(or SAO ∶ ED) have been modulated by doping with Yb

or/and Er

according to the energy-level model proposed recently by Dorenbos. To analyze the decay process

we use a new developed analytical model instead of the usually adopted empirical one. The decay curves have been analyzed by this model. It is found that the doped Yb

does enhance the light-emitting intensity of SAO ∶ ED as predicted by Dorenbos

yet it acts not as a light-emitting center

but as an auxiliary excitation center. In consistent with Dorenbos' prediction

the doped Er

does act as a trap center. But when SAO ∶ ED is co-doped with Er

and Yb

plays a role

which exerts an effect of re-trapping

increases the initial light-emitting intensity and reduces the decay time

but the figure of merit of light-emitting does not change significantly.

关键词

Keywords

references

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