Ba2+取代及助熔剂对Sr3SiO5:Eu2+结构和发光性能的影响

冯珊; 向明; 雷婷; 孟小康; 谭劲

doi:10.3788/fgxb20133404.0438

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Ba²⁺取代及助熔剂对Sr₃SiO₅:Eu²⁺结构和发光性能的影响

材料合成及性能 | 更新时间：2020-08-12

- Ba²⁺取代及助熔剂对Sr₃SiO₅:Eu²⁺结构和发光性能的影响
- Effect of Ba²⁺ Substitution and Fluxes on The Crystal Structure and Luminescent Properties of Sr₃SiO₅:Eu²⁺ Orange Phosphor
- 发光学报 2013年34卷第4期页码：438-443
- 作者机构：
  
  中国地质大学材料与化学学院, 湖北武汉 430074
- 作者简介：
- 基金信息：
  
  国家自然科学基金 (40643018)();大学生创新实验计划(101049109)资助项目()
- DOI：10.3788/fgxb20133404.0438
  中图分类号： O482.31
- 收稿日期：2012-12-27，
  
  修回日期：2013-01-23，
  
  网络出版日期：2013-01-25，
  
  纸质出版日期：2013-04-10
- 稿件说明：
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冯珊, 向明, 雷婷, 孟小康, 谭劲. Ba2+取代及助熔剂对Sr3SiO5:Eu2+结构和发光性能的影响[J]. 发光学报, 2013,34(4): 438-443

FENG Shan, XIANG Ming, LEI Ting, MENG Xiao-kang, TAN Jin. Effect of Ba2+ Substitution and Fluxes on The Crystal Structure and Luminescent Properties of Sr3SiO5:Eu2+ Orange Phosphor[J]. Chinese Journal of Luminescence, 2013,34(4): 438-443
冯珊, 向明, 雷婷, 孟小康, 谭劲. Ba2+取代及助熔剂对Sr3SiO5:Eu2+结构和发光性能的影响[J]. 发光学报, 2013,34(4): 438-443 DOI： 10.3788/fgxb20133404.0438.

FENG Shan, XIANG Ming, LEI Ting, MENG Xiao-kang, TAN Jin. Effect of Ba2+ Substitution and Fluxes on The Crystal Structure and Luminescent Properties of Sr3SiO5:Eu2+ Orange Phosphor[J]. Chinese Journal of Luminescence, 2013,34(4): 438-443 DOI： 10.3788/fgxb20133404.0438.

摘要

采用还原气氛下的高温固相法制备了Sr

SiO

:Eu

橙色荧光粉

利用X射线衍射、扫描电子显微镜和荧光分光光度计考察了Ba

与Sr

替换和助熔剂对Sr

SiO

:Eu

晶体结构和发光性能的影响。结果表明:Ba

取代Sr

会使配位多面体膨胀

导致附近Eu

占据的配位多面体压缩

晶体场强度增大。随着Ba

取代量的增加

逐渐占据Ba

取代后的多面体中心

晶体场强度减弱

发射光谱峰值整体先由575 nm红移至592 nm 后又蓝移回583 nm。Sr

与Ba

的量比

(Sr):

(Ba)=4时

发射光谱红移效果最佳。助熔剂H

的掺入会使Sr

SiO

:Eu

的发光强度急剧下降。而NH

F和NH

Cl掺入都能使Sr

SiO

:Eu

的发射光谱强度增大

F和NH

Cl单掺质量分数分别为2%和0.3%时增强效果最好

且NH

Cl的增强效果比NH

F要好很多。

Abstract

SiO

:Eu

phosphors were synthesized by high temperature solid state reaction method under a reductive atmosphere. The effects of Ba

substitution for Sr

and fluxes on the crystal structure and the luminescent properties of Sr

SiO

:Eu

phosphors were investigated by X-ray powder diffraction (XRD)

scanning electron microscopy (SEM)

and fluorescence spectrophotometer. The substitution of the host lattice cation Sr

by Ba

can make the polyhedron enlarged and then cause the shrinking of the neighboring Sr

or Eu

sites

which may explain an increased crystal field. Along with the increase of the Ba

concentration

occupies the Ba

site by degrees and the crystal field decreases. Thus

the emission wavelengths of the sample display red-shift from 575 nm to 592 nm at first and then blue-shift back to 583 nm. The maximum emission wavelength appears when

(Sr):

(Ba)=4. The experimental results also indicate that the influence of different flux on the luminescent intensity of the Sr

SiO

:Eu

phosphors varied: H

decreased sharply

F improved a little and NH

Cl improved greatly. The optimum mass fraction was 2% for NH

F and 0.3% for NH

respectively.

关键词

Keywords

references

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