Luminescent properties of deep red light-emitting phosphors NaGd(WO4)2:Pr3+ for blue LED

被引：19

作者：

Xiong, F. B. ^{[1
]}

Zhang, Z. W. ^{[2
]}

Lin, H. F. ^{[1
]}

Wang, L. J. ^{[1
]}

Xu, Y. C. ^{[1
]}

Zhu, W. Z. ^{[1
]}

机构：

[1] Xiamen Univ Technol, Dept Optoelect, Xiamen 361024, Fujian, Peoples R China

[2] Xiamen Univ Technol, Dept Elect Engn, Xiamen 361024, Fujian, Peoples R China

来源：

OPTICAL MATERIALS | 2015年 / 42卷

关键词：

Luminescent properties; Deep red phosphors; Energy transfer; Concentration quenching; White LEDs; OPTICAL-PROPERTIES; EMISSION; CRYSTALS; PR3+;

D O I：

10.1016/j.optmat.2015.01.034

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pr3+-doped NaGd(WO4)(2) phosphors with deep red emission in pure phase were prepared via high temperature solid-state reaction. Photoluminescence properties of those phosphors were investigated. Deep red emission bands with central wavelength at 649 nm were observed under the excitation of 430-500 nm, which is suitable for excitation of the blue LED chips. The optimum doping concentration of Pr3+ ions in NaGd(WO4)(2) is 4.0 at.%. The fluorescence concentration quenching could be attributed to the phonon-assisted cross-relaxation energy transfer between the Pr3+ ions. The CIE color coordinates of Pr-doped NaGd(WO4)(2) phosphors with different Pr3+ concentration can be tuned from deep red to light red. The present work suggests that Pr3+-doped NaGd(WO4)(2) exhibit great potential for using as deep red phosphors for the blue LED. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：394 / 398

页数：5

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