Luminescence properties of color-tunable zinc-codoped alikali earth sulfide phosphor for LED application

被引：13
|
作者：
Zhang, Xinguo [1 ]
Dong, Zhiyue [1 ]
Shi, Jianxin [1 ]
Gong, Menglian [1 ]
机构：
[1] Sun Yat Sen Univ, Sch Chem & Chem Engn, State Key Lab Optoelect Mat & Technol, Lab Bioinorgan & Synthet Chem,Minist Educ, Guangzhou 510275, Peoples R China
来源：
MATERIALS LETTERS | 2012年 / 76卷
关键词：
Luminescence; Phosphors; Optical materials and properties; LUMINOUS PROPERTIES;
D O I：
10.1016/j.matlet.2012.02.051
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Zn2+-codoped alikali earth sulfide, (Sr, Ca, Zn)S:Eu2+, was synthesized by a solid-state reaction. The synthesized phosphor was efficiently excited in a broad spectral range from 400 to 500 nm, and exhibits a strong and broad-band red emission. Zn2+-codoping greatly enhanced the emission of this sulfide phosphor. By adjusting the ratio of Sr2+ to Ca2+ in the host, the emission wavelength could be tuned in a range of 606-645 nm. Red and white LEDs were fabricated with this phosphor and blue chips. The red LED shows a high color purity of 92%, while the white LED has CIE coordinates, T-c and R-a of (0.4051, 0.3841), 3450 K, and 80, respectively. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：113 / 116
页数：4
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