Preparation, structure and photoluminescence properties of EU2+ and Ce3+-doped SrYSi4N7

被引：105

作者：

Li, YQ ^{[1
]}

Fang, CM ^{[1
]}

de With, G ^{[1
]}

Hintzen, HT ^{[1
]}

机构：

[1] Tech Univ Eindhoven, Fac Scheikundige Technol, SVM, Lab Solid State & Mat Chem, NL-5600 MB Eindhoven, Netherlands

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2004年 / 177卷 / 12期

关键词：

crystal structure; Rietveld refinement; europium; cerium; luminescence; phophor; rare-earth silicon nitride;

D O I：

10.1016/j.jssc.2004.07.054

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Undoped and Eu2+ or Ce3+-doped SrYSi4N7 were synthesized by solid-state reaction method at 1400-1660 degreesC under nitrogen/hydrogen atmosphere. The crystal structure was refined from the X-ray powder diffraction data by the Rietveld method. SrYSi4N7 and EuYSi4N7, being isotypic with the family of compounds MYbSi4N7 (M=Sr, Eu, Ba) and BaySi(4)N(7), crystallize with the hexagonal symmetry: space group P6(3)mc (No. 186), Z = 2, a = 6.0160 (1) Angstrom, c = 9.7894 (1) Angstrom, V = 306.83(3) Angstrom(3); and a = 6.0123 (1) Angstrom, c = 9.7869 (1) Angstrom, V= 306.37(1) Angstrom(3), respectively. Photoluminescence properties have been studied for Sr1-xEuxYSi4N7 (x=0-1) and SrY1-xCexSi4N7 (x = 0-0.03) at room temperature. Eu2+-doped SrYSi4N7 shows a broad yellow emission band peaking around 548-570 nm, while Ce3+-doped SrYSi4N7 exhibits a blue emission band with a maximum at about 450 nm. SrYSi4N7:Eu2+ can be very well excited by 390 nm radiation, which makes this material attractive as conversion phosphor for LED lighting applications. (C) 2004 Elsevier Inc. All rights reserved.

引用

页码：4687 / 4694

页数：8

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