Energy Transfer in Y3Al5O12 ∶ Ce3+, Cr3+ and Y3Al5O12 ∶ Ce, Pr, Cr

WANG Lei; ZHANG Xia; HAO Zhen-dong; LUO Yong-shi; WANG Xiao-jun; ZHANG Jia-hua

doi:10.3788/fgxb20113205.0417

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Energy Transfer in Y₃Al₅O₁₂ ∶ Ce³⁺, Cr³⁺ and Y₃Al₅O₁₂ ∶ Ce, Pr, Cr

paper | 更新时间：2020-08-12

- Energy Transfer in Y₃Al₅O₁₂ ∶ Ce³⁺, Cr³⁺ and Y₃Al₅O₁₂ ∶ Ce, Pr, Cr
- Chinese Journal of Luminescence Vol. 32, Issue 5, Pages: 417-422(2011)
- 作者机构：
  
  1. 中国科学院研究生院北京,100049
  2. 中国科学院激发态重点实验室长春光学精密机械与物理研究所, 吉林长春 130033
  3. 美国乔治亚南大学物理系, 美国乔治亚 30460
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20113205.0417
  CLC： O482.31
- Received：16 November 2010，
  
  Revised：31 December 2010，
  
  Published Online：22 May 2011，
  
  Published：22 May 2011
- 稿件说明：
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王磊, 张霞, 郝振东, 骆永石, 王笑军, 张家骅. Y3Al5O12 ∶ Ce3+, Cr3+ 和 Y3Al5O12 ∶ Ce3+, Pr3+, Cr3+ 荧光粉体系中的能量传递[J]. 发光学报, 2011,32(5): 417-422

WANG Lei, ZHANG Xia, HAO Zhen-dong, LUO Yong-shi, WANG Xiao-jun, ZHANG Jia-hua. Energy Transfer in Y3Al5O12 ∶ Ce3+, Cr3+ and Y3Al5O12 ∶ Ce, Pr, Cr[J]. Chinese Journal of Luminescence, 2011,32(5): 417-422
王磊, 张霞, 郝振东, 骆永石, 王笑军, 张家骅. Y3Al5O12 ∶ Ce3+, Cr3+ 和 Y3Al5O12 ∶ Ce3+, Pr3+, Cr3+ 荧光粉体系中的能量传递[J]. 发光学报, 2011,32(5): 417-422 DOI： 10.3788/fgxb20113205.0417.

WANG Lei, ZHANG Xia, HAO Zhen-dong, LUO Yong-shi, WANG Xiao-jun, ZHANG Jia-hua. Energy Transfer in Y3Al5O12 ∶ Ce3+, Cr3+ and Y3Al5O12 ∶ Ce, Pr, Cr[J]. Chinese Journal of Luminescence, 2011,32(5): 417-422 DOI： 10.3788/fgxb20113205.0417.

摘要

通过在YAG ∶ Ce

和YAG ∶ Ce

荧光粉体系中分别掺入Cr

离子来提高蓝光管芯白光LED的显色指数。Cr

离子的加入

增加了红光发射

这归因于Cr

的

E-

跃迁的零声子线和声子边带发光。Ce

的能量传递是增强红光发射的重要方式

在YAG ∶ Ce

体系中

由发射光谱得到的Cr

的红光与Ce

黄光发射强度的比值(

)与通过寿命测量得到的强度比很好符合。YAG ∶ Ce

体系中

在只有Ce

离子被激发的状态下(

=340 nm)

3种能量传递过程同时存在:Ce

、Ce

和Pr

进一步增加了红光比例。利用这两种荧光粉和460 nm蓝光发射管芯封装得到的白光LED

在正向驱动电流为20 mA时

LED的显色指数分别为80.4和81.4。

Abstract

Triply doped Y

∶ Ce

phosphors with Ce

and Pr

substituting for Y

sites and Cr

substituting for Al

site are prepared by solid state reaction. A broad emission spectrum composed a yellow emission band from Ce

a light red emission line from Pr

and a deep red emission line from Cr

which are generated through energy transfer among the dopant ions. The study of photoluminescence and fluorescence decay indicates that there exist energy transfers from Ce

and Ce

. The effect of energy transfer on relative intensities of the three emissions is analyzed. A white LED is fabricated using a blue LED chip coated with the triply doped phosphor and shows a color rendering index of 81.4 and 80.4

respectively.It is higher than that either using Ce

and Cr

doubly doped phosphor or Ce

singly doped phosphors.

关键词

Keywords

references

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