Concentration quenching of Eu2+ in a thermal-stable yellow phosphor Ca2BO3Cl:Eu2+ for LED application

被引：45

作者：

Zhang, Xinguo ^{[1
]}

Zhang, Jilin ^{[1
]}

Dong, Zhiyue ^{[1
]}

Shi, Jianxin ^{[1
]}

Gong, Menglian ^{[1
]}

机构：

[1] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Minist Educ Lab Bioinorgan & Synthet Chem, Sch Chem & Chem Engn, Guangzhou 510275, Guangdong, Peoples R China

来源：

JOURNAL OF LUMINESCENCE | 2012年 / 132卷 / 04期

关键词：

Borate phosphor; Photoluminescence; Concentration quenching; Light-emitting diode; CALCIUM BORATE CHLORIDE; LIGHT-EMITTING-DIODES; LUMINESCENT PROPERTIES; ENERGY-TRANSFER; WHITE; EMISSION; PHOTOLUMINESCENCE; SR2SIO4-EU;

D O I：

10.1016/j.jlumin.2011.11.001

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A piece-shaped phosphor Ca2BO3Cl: Eu2+ was synthesized by solid-state reaction method. This phosphor exhibited wide absorption in ultra-violet and visible range, and bright yellow emission band centering at 570 nm. The concentration quenching mechanism was verified to be a dipole-dipole interaction, and its critical transfer distance was about 17 angstrom by both calculated crystal structural method and experimental spectral method. This phosphor has a good thermal stability with a quenching temperature (T-1/2) of 200 degrees C. Yellow and white LEDs were fabricated with this phosphor and near UV chips, and the yellow LED has a high color purity of 97.0% and promising current tolerant property, while the white LED shows a luminous efficiency of 11.68 lm/W. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.

引用

页码：914 / 918

页数：5

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