Preparation and luminescence of blue-emitting phosphor Ca2PO4Cl:Eu2+ for n-UV white LEDs

被引：23
作者：
Yu, Ruijin [1 ,2 ,3 ]
Guo, Chongfeng [2 ,3 ]
Li, Ting [2 ,3 ]
Xu, Yan [2 ,3 ]
机构：
[1] Northwest A&F Univ, Coll Sci, Yangling 712100, Shaanxi, Peoples R China
[2] Northwest Univ, Natl Key Lab Photoelect Technol & Funct Mat Cultu, Natl Photoelect Technol & Funct Mat & Applicat Sc, Inst Photon & Photon Technol, Xian 710069, Peoples R China
[3] Northwest Univ, Dept Phys, Xian 710069, Peoples R China
来源：
CURRENT APPLIED PHYSICS | 2013年 / 13卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Luminescence; Phosphor; LED; DIODES; EU2+;
D O I：
10.1016/j.cap.2012.12.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A series of blue-emitting Ca2-xEuxPO4Cl phosphors were synthesized by a solid state method in a reducing atmosphere. The factors those affect the structure and the photoluminescence (PL) intensities of phosphors, including the dosage of chlorine source CaCl2, reaction time and annealing temperature, have been investigated in detail. X-ray diffraction (XRD) and photoluminescence measurements were performed to testify the crystal structure and luminescent properties. The optimal Eu2+ concentration was determined, and the mechanism of the concentration quenching was predominated by dipole-dipole interaction. The present phosphor exhibits a strong absorption in the near-UV region, emits an intense blue emission centered at 451 nm and presents excellent thermal stability, suggesting that the phosphor is competitive as a promising blue-emitting phosphor for near ultraviolet (n-UV) light-emitting diodes (LEDs). (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码：880 / 884
页数：5
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