Optical Properties of Eu3+ ,Dy3+ ,Sm3+ Doped Ca(Sr,Ba)WO4

YANG Yan-min; LIU Chong; LIU Yun-feng; CHEN Bao-jiu; ZHANG Hao

doi:10.3788/fgxb20113207.0699

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Optical Properties of Eu³⁺ ,Dy³⁺ ,Sm³⁺ Doped Ca(Sr,Ba)WO₄

paper | 更新时间：2020-08-12

- Optical Properties of Eu³⁺ ,Dy³⁺ ,Sm³⁺ Doped Ca(Sr,Ba)WO₄
- Chinese Journal of Luminescence Vol. 32, Issue 7, Pages: 699-703(2011)
- 作者机构：
  
  1. 河北大学物理科学与技术学院,河北保定,071002
  2. 河北大学工商学院,河北保定,071002
  3. 河北大学研究生学院,河北保定,071002
  4. 大连海事大学物理系,辽宁大连,116026
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20113207.0699
  CLC： O482.31
- Received：25 January 2011，
  
  Revised：24 February 2011，
  
  Published Online：22 July 2011，
  
  Published：22 July 2011
- 稿件说明：
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杨艳民, 刘冲, 刘云峰, 陈宝玖, 张浩. Eu3+ ,Dy3+ ,Sm3+掺杂Ca(Sr,Ba)WO4的光谱性质[J]. 发光学报, 2011,32(7): 699-703

YANG Yan-min, LIU Chong, LIU Yun-feng, CHEN Bao-jiu, ZHANG Hao. Optical Properties of Eu3+ ,Dy3+ ,Sm3+ Doped Ca(Sr,Ba)WO4[J]. Chinese Journal of Luminescence, 2011,32(7): 699-703
杨艳民, 刘冲, 刘云峰, 陈宝玖, 张浩. Eu3+ ,Dy3+ ,Sm3+掺杂Ca(Sr,Ba)WO4的光谱性质[J]. 发光学报, 2011,32(7): 699-703 DOI： 10.3788/fgxb20113207.0699.

YANG Yan-min, LIU Chong, LIU Yun-feng, CHEN Bao-jiu, ZHANG Hao. Optical Properties of Eu3+ ,Dy3+ ,Sm3+ Doped Ca(Sr,Ba)WO4[J]. Chinese Journal of Luminescence, 2011,32(7): 699-703 DOI： 10.3788/fgxb20113207.0699.

摘要

采用共沉淀方法制备了稀土离子Eu

掺杂的Ca(Sr

Ba)WO

发光材料

目的是研究金属阳离子改变对稀土离子发光性质的影响。X射线衍射光谱数据表明

CaWO

、SrWO

、BaWO

都是四方晶系

(88)结构

随着阳离子半径增大

衍射峰向小角移动。不同温度制备的BaWO

样品X射线衍射光谱数据表明

温度较低时制备的晶体样品X射线衍射峰较宽;当制备温度升高后

晶体样品X射线衍射峰宽变窄。样品的SEM 照片表明

低温制备的样品晶粒尺寸较小

约为100~300 nm;高温制备样品晶粒尺寸较大

约为2~6 m。测试了Eu

掺杂的Ca(Sr

Ba)WO

发光材料的激发和发射光谱。计算了Eu

掺杂的Ca(Sr

Ba)WO

的J-O强度参数

(=2

值随着阳离子半径增大迅速减小

经分析它是导致Eu

掺杂的Ca(Sr

Ba)WO

的发射强度随着阳离子半径增大迅速减弱的原因。然而Sm

掺杂的SrWO

其他两种晶体相比

其发射强度反而增强。根据激发光谱和文献报道

我们认为可能是由于钨酸根离子与稀土离子的能量传递引起的。从Dy

掺杂的Ca(Sr

Ba)WO

的发射光谱可以看到

随着阳离子半径增大发射峰蓝移

发射峰的Stark劈裂减弱。我们用位形坐标图解释了这一现象产生的原因。

Abstract

doped Ca(Sr

Ba)WO

phosphors were synthesized by the co-precipitation method in order to investigate the effect of different metallic cations on luminescence properties of rare earth ions. The data of X ray diffraction (XRD) indicated that the crystal structures of CaWO

SrWO

BaWO

belong to tetragonal

(88) and the diffraction peaks moved towards smaller angle with the increasing diameter of the metal cation. The data of X-ray diffraction (XRD) of BaWO

synthesized under different temperatures showed that the diffraction peaks were broader under lower synthesized temperature

which can be attributed to the smaller particle sizes (about 100~300 nm seen from SEM morphology) of BaWO

phosphors under lower synthesized temperature. The emission spectrum and excitation spectrum of Eu

doped Ca(Sr

Ba)WO

phosphors were measured. J-O strength parameters

(

4) of Eu

ion

were calculated. The data indicated that

decreased with increasing diameter of the metal cation

which can be used to explain the decrease of emission intensity of Eu

doped Ca(Sr

Ba)WO

with increasing diameter of the metal cation. However

the emission intensity of Sm

doped SrWO

phosphors were more stronger than that of Sm

doped Ca(Ba)WO

which can be explained by the energy transfer between WO

and rare earth ions. It can be seen from the emission spectrum of Dy

doped Ca(Sr

Ba)WO

the emission peaks moved towards shorter wavelength and their bandwidths were reduced

which was explained by the configurational coordinate diagram.

关键词

Keywords

references

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