Eu2+浓度对Sr2Si5N8:Eu2+红粉热猝灭机制的影响

陈磊; 刘荣辉; 庄卫东; 刘元红; 胡运生; 杜甫

doi:10.3788/fgxb20153604.0371

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Eu²⁺浓度对Sr₂Si₅N₈:Eu²⁺红粉热猝灭机制的影响

材料合成及性能 | 更新时间：2020-08-12

- Eu²⁺浓度对Sr₂Si₅N₈:Eu²⁺红粉热猝灭机制的影响
- Effect of Eu²⁺ Concentration on The Thermal Quenching Mechanism of Sr₂Si₅N₈:Eu²⁺ Red Phosphors
- 发光学报 2015年36卷第4期页码：371-376
- 作者机构：
  
  1. 北京有色金属研究总院稀土材料国家工程研究中心北京,100088
  2. 有研稀土新材料股份有限公司北京,100088
- 作者简介：
- 基金信息：
  
  国家自然科学基金(51102021();51302016)();&ldquo();973();国家重点基础研究发展计划(2014CB643801)资助项目()
- DOI：10.3788/fgxb20153604.0371
  中图分类号： O482.31
- 纸质出版日期：2015-4-3，
  
  收稿日期：2015-1-5，
  
  修回日期：2015-2-9，
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陈磊, 刘荣辉, 庄卫东等. Eu2+浓度对Sr2Si5N8:Eu2+红粉热猝灭机制的影响[J]. 发光学报, 2015,36(4): 371-376

CHEN Lei, LIU Rong-hui, ZHUANG Wei-dong etc. Effect of Eu2+ Concentration on The Thermal Quenching Mechanism of Sr2Si5N8:Eu2+ Red Phosphors[J]. Chinese Journal of Luminescence, 2015,36(4): 371-376
陈磊, 刘荣辉, 庄卫东等. Eu2+浓度对Sr2Si5N8:Eu2+红粉热猝灭机制的影响[J]. 发光学报, 2015,36(4): 371-376 DOI： 10.3788/fgxb20153604.0371.

CHEN Lei, LIU Rong-hui, ZHUANG Wei-dong etc. Effect of Eu2+ Concentration on The Thermal Quenching Mechanism of Sr2Si5N8:Eu2+ Red Phosphors[J]. Chinese Journal of Luminescence, 2015,36(4): 371-376 DOI： 10.3788/fgxb20153604.0371.

摘要

采用高温固相法制备了不同Eu

浓度掺杂的Sr

红色荧光粉

并对其晶体结构、形貌、发光和热猝灭性能进行了详细的研究。XRD和SEM测试表明

所合成的样品为纯相Sr

结构

具有较高的结晶度。PL光谱数据表明

替代Sr

格位形成两种不同的发光中心。温度特性测试发现

样品的热猝灭性能很大程度上取决于Eu

浓度。随着Eu

浓度的增加

样品的热猝灭性能先增强后降低。不同发光中心的荧光强度比和荧光寿命测试结果表明:在较低Eu

掺杂条件下

浓度引起热猝灭性能改变的机制主要归因于Eu

占据不同Sr

格位的几率的改变。

Abstract

doped Sr

red phosphors with different Eu

concentration were synthesized by high-temperature solid state method. The crystal structure

morphology

luminescence and thermal quenching properties were investigated in detail. X-ray diffraction (XRD) patterns show that a pure phase of Sr

phosphor with high crystallinity has been obtained. Photoluminescence (PL) spectra results indicate that there are two different luminescence centers when Eu

ions substitute Sr

sites. Thermal stability data show that the thermal quenching property is largely dependent on Eu

concentration. The changes of relative intensity ratio and fluorescence lifetime were examined for the two-peak emission in Sr

:Eu

. The results reveal that Eu

distribution changes with varying Eu

concentration

which should be the mainly mechanism of the thermal quenching behavior for Eu

doped Sr

phosphors at low dopant levels.

关键词

Sr2Si5N8荧光粉热猝灭荧光寿命

Keywords

Sr2Si5N8phosphorthermal quenchingfluorescence lifetime

references

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