Photo-stimulated and Thermo Luminescence Properties of Tm3+ Doped SrAl2O4:Eu2+ Phosphors

ZHANG Bu-hao; LI Fa-she; YU Xue

doi:10.3788/fgxb20153603.0299

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Photo-stimulated and Thermo Luminescence Properties of Tm³⁺ Doped SrAl₂O₄:Eu²⁺ Phosphors

更新时间：2020-08-12

- Photo-stimulated and Thermo Luminescence Properties of Tm³⁺ Doped SrAl₂O₄:Eu²⁺ Phosphors
- Chinese Journal of Luminescence Vol. 36, Issue 3, Pages: 299-304(2015)
- 作者机构：
  
  1. 昆明理工大学材料科学与工程学院,云南昆明,650093
  2. 昆明理工大学冶金与能源工程学院,云南昆明,650093
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20153603.0299
  CLC： O433.4;O482.31
- Received：10 December 2014，
  
  Revised：06 January 2015，
  
  Published：03 March 2015
- 稿件说明：
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张步豪, 李法社, 余雪. Tm3+掺杂SrAl2O4:Eu2+的光激励和热释光性能[J]. 发光学报, 2015,36(3): 299-304

ZHANG Bu-hao, LI Fa-she, YU Xue. Photo-stimulated and Thermo Luminescence Properties of Tm3+ Doped SrAl2O4:Eu2+ Phosphors[J]. Chinese Journal of Luminescence, 2015,36(3): 299-304
张步豪, 李法社, 余雪. Tm3+掺杂SrAl2O4:Eu2+的光激励和热释光性能[J]. 发光学报, 2015,36(3): 299-304 DOI： 10.3788/fgxb20153603.0299.

ZHANG Bu-hao, LI Fa-she, YU Xue. Photo-stimulated and Thermo Luminescence Properties of Tm3+ Doped SrAl2O4:Eu2+ Phosphors[J]. Chinese Journal of Luminescence, 2015,36(3): 299-304 DOI： 10.3788/fgxb20153603.0299.

摘要

通过高温固相法制备出Sr

0.98-

:0.02Eu

(

0.01

0.02

0.03

0.04

0.05)系列样品

并对其光激励和热释光性能进行了研究。在SrAl

:Eu

原有陷阱能级结构的基础上

通过Tm

的掺杂引入了更深的陷阱T

并增加原有陷阱T

浓度

进而优化了材料的光存储容量及光激励特性。对比研究了系列样品的初始光激励发光强度和热释光强度随着Tm

掺杂量的变化规律

证实陷阱T

为光激励发光提供了有效俘获中心。当Tm

的掺杂摩尔分数

=0.03时

材料中的陷阱T

的浓度达到最高值

同时光激励发光强度最大。对比Tm

共掺前后热释光图谱

通过Chen's半宽法计算出了引入陷阱T

的陷阱深度。实验结果证实材料中T

的浓度对其光激励发光性能起着决定性的作用。在980 nm激发下

由深陷阱T

释放出来的电子可以再次被浅陷阱T

俘获

这种浅陷阱T

的再俘获效应在光激励发光过程中表现为光激励余辉现象。

Abstract

A series of electron capture materials Sr

0.98-

:0.02Eu

(

0.01

0.02

0.03

0.04

0.05) were synthesized by a conventional solid-state reaction method. The deeper new trap (T

) was introduced into the SrAl

:Eu

phosphor lattice by the co-dopant of Tm

ions to optimize the properties of the ETM phosphor. Meanwhile

the trap concentration of intrinsic shallow trap (T

) was increased. The properties of photo-stimulated luminescence (PSL) and thermoluminescence (TL) in the series samples were investigated. It is found that T

is responsible for the performance of PSL. The most efficient initial PSL can be obtained when the co-doping mole fraction of Tm

is 0.03

which keeps the correspondence with the strongest TL intensity of T

. Besides

the phosphors show a PSL afterglow under 980 nm stimulation

which can be ascribed to the re-trapping of T

as the electrons firstly excited from T

will be re-trapped by the empty T

to generate the PSL afterglow.

关键词

Keywords

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