Ca4Y6Si6O25∶Eu2+绿色荧光粉的发光特性

杨志平; 闻建伟; 刘玉峰; 李立虎; 杨艳民; 周东站; 马淑媛; 于红伟

doi:10.3788/fgxb20113201.0007

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Ca₄Y₆Si₆O₂₅∶Eu²⁺绿色荧光粉的发光特性

材料合成及性能研究 | 更新时间：2020-08-12

- Ca₄Y₆Si₆O₂₅∶Eu²⁺绿色荧光粉的发光特性
- Luminescence Property of Ca₄Y₆Si₆O₂₅ ∶ Eu²⁺ Green Phosphor
- 发光学报 2011年32卷第1期页码：7-11
- 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：
  
  国家自然科学基金(50902042)();河北省自然科学基金(F2009000217)资助项目()
- DOI：10.3788/fgxb20113201.0007
  中图分类号： O482.31
- 收稿日期：2010-04-15，
  
  修回日期：2010-08-05，
  
  网络出版日期：2011-01-22，
  
  纸质出版日期：2011-01-22
- 稿件说明：
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杨志平, 闻建伟, 刘玉峰, 李立虎, 杨艳民, 周东站, 马淑媛, 于红伟. Ca4Y6Si6O25∶Eu2+绿色荧光粉的发光特性[J]. 发光学报, 2011,32(1): 7-11

YANG Zhi-ping, WEN Jian-wei, LIU Yu-feng, LI Li-hu, YANG Yan-min, MA Shu-yuan, YU Hong-wei. Luminescence Property of Ca4Y6Si6O25 ∶ Eu2+ Green Phosphor[J]. Chinese Journal of Luminescence, 2011,32(1): 7-11
杨志平, 闻建伟, 刘玉峰, 李立虎, 杨艳民, 周东站, 马淑媛, 于红伟. Ca4Y6Si6O25∶Eu2+绿色荧光粉的发光特性[J]. 发光学报, 2011,32(1): 7-11 DOI： 10.3788/fgxb20113201.0007.

YANG Zhi-ping, WEN Jian-wei, LIU Yu-feng, LI Li-hu, YANG Yan-min, MA Shu-yuan, YU Hong-wei. Luminescence Property of Ca4Y6Si6O25 ∶ Eu2+ Green Phosphor[J]. Chinese Journal of Luminescence, 2011,32(1): 7-11 DOI： 10.3788/fgxb20113201.0007.

摘要

采用高温固相法合成了Ca

∶ Eu

绿色荧光材料。通过X射线衍射分析得知

属于六方晶系

具有

(176)空间点群结构。测定了Eu

的激发光谱和发射光谱。Ca

∶ Eu

的激发光谱为350~450 nm的宽带谱

这与近紫外光LED芯片相匹配。发射光谱是峰值为527 nm的不对称宽带发射

这是因为Eu

占据了晶格中Ca

的位置

并产生了两种不同的发光中心。研究了Eu

的含量对Ca

4(1-

)

∶ 4

发光性能的影响

随着Eu

浓度的增大

材料的发光强度先增强后减弱

的最佳掺杂摩尔分数为20%(

=0.05)。根据Dexter理论得出

浓度猝灭机理为电四极-电四极相互作用。

Abstract

∶ Eu

green phosphor was prepared by high temperature solid-state reaction. The XRD speetrum indicates that Ca

has a hexagonal crystal structure with a space group of

(176). The excitation and emission spectra of Ca

∶ Eu

were measured when the mole fraction of Eu

was 20%. Its excitation spectrum is a broad band

from 350 nm to 450 nm

which matches with near ultraviolet LED chip. The emission spectrum of Ca

∶ Eu

exhibits an asymmetry broad band with the peak center at 527 nm

and it is because that Eu

takes the place of Ca

and forms two different luminescence centers. The effect of Eu

concentration on Ca

4(1-

)

∶ 4

intensity was also investigated. With the increase of Eu

concentration

the luminescence intensity of the green phosphor get to maximum and then decrease. The optimal mole fraction of Eu

is 20%(

=0.05). According to Dexter theory

concentration quenching can be attributed to quadrupole-quadrupole interaction.

关键词

Keywords

references

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