Crystal structure and luminescence properties of Eu2+ activated Sr12Al14O32Cl2: A potential green-emitting phosphor for near UV light-emitting diodes

被引：10

作者：

Jiang, Ziqiang ^{[1
]}

Sun, Zhihua ^{[1
]}

Su, Xinghua ^{[1
]}

Duan, Li ^{[1
]}

Yu, Xiaochen ^{[1
]}

机构：

[1] Changan Univ, Sch Mat Sci & Engn, Xian 710061, Shannxi, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 577卷

关键词：

NUV LEDs; Phosphor; Photoluminescence; Oxychloride host; EMISSION;

D O I：

10.1016/j.jallcom.2013.06.140

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A novel green-emitting Sr12Al14O32Cl2:Eu2+ phosphor was synthesized and its crystal structure, photoluminescence properties was investigated. Sr12Al14O32Cl2 crystallizes as a cubic structure with a space group of I (4) over bar 3d and lattice constants of a = 12.3471(7) angstrom, V = 1882.35(8) angstrom(3). Sr12Al14O32Cl2:Eu2+ can be efficiently excited in the wavelength range of 260-450 nm. When excited at 355 nm, it emit a broad band in the wavelength range of 450-600 nm with a maximum intensity at about 523 nm due to the 4f(6)5d(1)-4f(7) transitions of Eu2+. Weak red line emissions of Eu3+ were also observed in the emission spectra, indicating the coexistence of Eu2+ and Eu3+ ions in the sample. The Sr12Al14O32Cl2:Eu2+ would be a potential candidate green phosphor for near UV light-emitting diodes. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：683 / 686

页数：4

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