Investigation on Eu3+ doped Sr2MgSi2O7 red-emitting phosphors for white-light-emitting diodes

被引：44

作者：

Wu, Haoyi ^{[1
]}

Hu, Yihua ^{[1
]}

Wang, Yinhai ^{[1
]}

Kang, Fengwen ^{[1
]}

Mou, Zhongfei ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Phys & Optoelect Engn, Guangzhou 510006, Guangdong, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2011年 / 43卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Red-emitting; Charge compensation; Reduction of Eu3+; ENHANCED LUMINESCENT PROPERTIES; CHARGE COMPENSATION; EU2+; PHOTOLUMINESCENCE; CRYSTAL; DY3+; AIR; ATMOSPHERE; REDUCTION;

D O I：

10.1016/j.optlastec.2011.02.006

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this work, we report the high temperature solid-state synthesis of red phosphors Sr2MgSi2O7: Eu3+ with various Eu3+ concentrations. Their luminescent properties at room temperature are investigated. The X-ray diffraction patterns indicate that the red phosphors powder conforms to the tetragonal Sr2MgSi2O7. Impurity structure appears when more than 20% Eu3+ is doped. The samples show a strong emission line at 615 nm and the intensity increases with the increase of Eu3+ concentration until concentration quenching occurs. Charge compensation assists in the reduction of the impurity structure and vacancies; hence the luminescent intensity is enhanced. The decay measurement indicates that the lifetime of Eu3+ emission is about 2-3 ms. Some of the Eu3+ can be reduced to Eu2+; this is also discussed. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1104 / 1110

页数：7

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