Luminescent Properties and Concentration Quenching of Eu2+ in Ba2 Ca(BO3)2

WANG Zhi-jun; LIU Chong; YANG Zhi-ping; LI Pan-lai; GUO Qing-lin

doi:10.3788/fgxb20123307.0729

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Luminescent Properties and Concentration Quenching of Eu²⁺ in Ba₂ Ca(BO₃)₂

更新时间：2020-08-12

- Luminescent Properties and Concentration Quenching of Eu²⁺ in Ba₂ Ca(BO₃)₂
- Chinese Journal of Luminescence Vol. 33, Issue 7, Pages: 729-735(2012)
- 作者机构：
  
  1. 河北大学物理科学与技术学院,河北保定,071002
  2. 河北大学研究生学院, 河北保定 071002
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20123307.0729
  CLC： TN383.1
- Received：05 April 2012，
  
  Revised：18 May 2012，
  
  Published Online：10 July 2012，
  
  Published：10 July 2012
- 稿件说明：
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王志军, 刘冲, 杨志平, 李盼来, 郭庆林. Eu2+在Ba2Ca(BO3)2中的发光特性及浓度猝灭[J]. 发光学报, 2012,33(7): 729-735

WANG Zhi-jun, LIU Chong, YANG Zhi-ping, LI Pan-lai, GUO Qing-lin. Luminescent Properties and Concentration Quenching of Eu2+ in Ba2 Ca(BO3)2[J]. Chinese Journal of Luminescence, 2012,33(7): 729-735
王志军, 刘冲, 杨志平, 李盼来, 郭庆林. Eu2+在Ba2Ca(BO3)2中的发光特性及浓度猝灭[J]. 发光学报, 2012,33(7): 729-735 DOI： 10.3788/fgxb20123307.0729.

WANG Zhi-jun, LIU Chong, YANG Zhi-ping, LI Pan-lai, GUO Qing-lin. Luminescent Properties and Concentration Quenching of Eu2+ in Ba2 Ca(BO3)2[J]. Chinese Journal of Luminescence, 2012,33(7): 729-735 DOI： 10.3788/fgxb20123307.0729.

摘要

采用高温固相法

以CaCO

(A.R)、BaCO

(A.R)、H

(A.R)和Eu

(99.99%)为原料制备了Ba

Ca(BO

)

∶Eu

绿色发光材料

测量了材料的晶体结构、发光特性及色坐标等。Ba

Ca(BO

)

∶Eu

材料的激发光谱覆盖200~500 nm的紫外-可见光区。在400 nm近紫外光激发下

材料的发射光谱为一主峰位于537 nm的非对称宽谱

对应于Eu

的4f

→4f

特征跃迁。研究发现

随Eu

掺杂浓度的增大

Ca-(BO

)

∶Eu

材料的发射强度呈现先增大、后减小的变化趋势

最大发射强度对应的Eu

掺杂摩尔分数为2%。造成发射强度下降的原因为浓度猝灭

其机理为电偶极-电偶极相互作用。依据晶格常数及实验光谱数据

得出临界距离

分别为2.64 nm和2.11 nm。随Eu

掺杂浓度的增大

Ca(BO

)

∶Eu

材料的色坐标变化微小。计算得到Ba

Ca(BO

)

∶2%Eu

的转换效率约为72%。

Abstract

Ca(BO

)

∶Eu

phosphor was synthesized by a high temperature solid-state method. CaCO

(A.R)

BaCO

(A.R)

(A.R) and Eu

(99.99%) were used as raw materials. Its crystal structure

luminescent characteristics and Commission International de lEclairage (CIE) chromaticity coordinates values were measured. Under the ultraviolet to visible light irradiation

Ca(BO

)

∶Eu

shows an asymmetrically single green emission band with a maximum at 537 nm

which corresponds to the 4f

→4f

transition of Eu

. The emission intensity of Ba

Ca(BO

)

∶Eu

was influenced by Eu

molefraction

at first

it increases with the increase of Eu

mole fraction

and reaches a maximum value at 2%Eu

then decreases with further increasing its concentration because of the concentration quenching effect. And the concentration quenching mechanism is verified to be dipole-dipole interaction. According to the crystal structure data and the experimental spectral data

the critical distances(

) can be obtained

and are 2.64 nm and 2.11 nm

respectively. Moreover

with increasing the Eu

doped content

the CIE chromaticity coordinates of the samples were slightly varied. For Ba

Ca(BO

)

∶2%Eu

the quantum efficiency is approximately 72%.

关键词

Keywords

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