Luminescence Properties of Blue-green Phosphors Sr1-xBaxAl2O4∶Eu2+ for White LED

YANG Zhi-ping; ZHOU Dong-zhan; MA Shu-yuan; YU Hong-wei; LIU Yu-feng; LI Xu

doi:10.3788/fgxb20113208.0755

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Luminescence Properties of Blue-green Phosphors Sr_1-xBa_xAl₂O₄∶Eu²⁺ for White LED

paper | 更新时间：2020-08-12

- Luminescence Properties of Blue-green Phosphors Sr_1-xBa_xAl₂O₄∶Eu²⁺ for White LED
- Chinese Journal of Luminescence Vol. 32, Issue 8, Pages: 755-760(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. 河北大学电子信息工程学院,河北保定,071002
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20113208.0755
  CLC： O482.31
- Received：14 April 2011，
  
  Revised：17 June 2011，
  
  Published Online：22 August 2011，
  
  Published：22 August 2011
- 稿件说明：
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杨志平, 周东站, 马淑媛, 于红伟, 刘玉峰, 李旭. 白光LED用蓝绿色荧光粉 Sr1-xBaxAl2O4∶Eu2+的发光性质[J]. 发光学报, 2011,32(8): 755-760

YANG Zhi-ping, ZHOU Dong-zhan, MA Shu-yuan, YU Hong-wei, LIU Yu-feng, LI Xu. Luminescence Properties of Blue-green Phosphors Sr1-xBaxAl2O4∶Eu2+ for White LED[J]. Chinese Journal of Luminescence, 2011,32(8): 755-760
杨志平, 周东站, 马淑媛, 于红伟, 刘玉峰, 李旭. 白光LED用蓝绿色荧光粉 Sr1-xBaxAl2O4∶Eu2+的发光性质[J]. 发光学报, 2011,32(8): 755-760 DOI： 10.3788/fgxb20113208.0755.

YANG Zhi-ping, ZHOU Dong-zhan, MA Shu-yuan, YU Hong-wei, LIU Yu-feng, LI Xu. Luminescence Properties of Blue-green Phosphors Sr1-xBaxAl2O4∶Eu2+ for White LED[J]. Chinese Journal of Luminescence, 2011,32(8): 755-760 DOI： 10.3788/fgxb20113208.0755.

摘要

采用高温固相法在还原气氛中合成Sr

∶Eu

荧光材料。XRD显示

当钡掺杂量

0.4时

对应样品主要为单斜SrAl

晶体结构;当

0.4时

对应样品主要为简单六方BaAl

晶体结构。在360 nm激发下

样品的发射光谱随

的增加由单一的绿光发射(

max

=516 nm)逐渐转变为蓝绿光双发射(

max1

=441 nm

max2

=486 nm)。在Eu

摩尔分数为0.29%时

双发射峰强度最强;继续增加Eu

浓度

将出现浓度猝灭。研究表明

∶Eu

的浓度猝灭机理为电偶极-电偶极相互作用。

Abstract

∶Eu

phosphors were synthesized in a reducing atmosphere by high temperature solid state method at 1 350 ℃. The patterns of XRD indicated that the crystal structure of the phosphors are the monoclinic phase of SrAl

when

0.4 and the simple hexagonal phase of BaAl

when

0.4 because of crystal lattice expands with Ba

ion substitution for Sr

ion. Photoluminescence experiments were carried out to study the luminescence properties of the phosphors excited under 360 nm. The results showed that emission spectra gradually changed from single green emission (

max

=516 nm) to blue-green dual-emission (

max1

= 441 nm

max2

=486 nm) with the increase of

. When

was 0.5

there was a better property in Sr

0.5

∶Eu

. From the relationship between the concentration of Eu

ion and the intensities of emissions in Sr

0.5

∶

%Eu

we get that the maximum dual-emission intensity when

=0.29%. There exist a concentration quenching effect in Sr

0.5

∶Eu

and the study points out that the mechanism of concentration quenching effect is electric dipole-dipole interaction.

关键词

Keywords

references

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