Study of the cation distributions in Eu doped Sr2Y8(SiO4)6O2 by X-ray diffraction and photoluminescent spectra

被引：43
|
作者：
Shen, Yiqiang [1 ]
Chen, Rui [2 ]
Xiao, Fen [2 ]
Sun, Handong [2 ]
Tok, Alfred [1 ]
Dong, Zhili [1 ]
机构：
[1] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore
[2] Nanyang Technol Univ, Div Phys & Appl Phys, Sch Phys & Math Sci, Singapore 637371, Singapore
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2010年 / 183卷 / 12期
关键词：
Apatite-type structure; X-ray diffraction; Rietveld refinement; Photoluminescent spectra; MODEL APATITE SYSTEMS; MIXED-METAL OXIDES; CRYSTAL-STRUCTURE; SITE OCCUPATION; TOXIC METALS; LUMINESCENCE; STABILIZATION; FLUORESCENCE; INTENSITIES; CHEMISTRY;
D O I：
10.1016/j.jssc.2010.10.025
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The crystal structure and photoluminescent properties of europium doped silicate Sr2Y8(SiO4)(6)O-2:Eu3+ are reported. The Sr2Y8-xEux(SiO4)(6)O-2 compounds have typical apatite crystal structures with the P6(3)/m space group. The distributions of Eu3+ between the two crystallographic sites 4f and 6h in the apatite structure are investigated by the powder X-ray diffraction and Rietveld refinement. Results show that Eu3+ ions only occupy the 4f sites when the Eu doping concentration is low (x=0-0.5 in Sr2Y8-xEux(SiO4)(6)O-2). However, in higher concentrations, Eu3+ ions begin to enter the 611 sites as well. The distributions of the Eu3+ are also reflected in photoluminescent spectra. The CIE coordinates for Sr2Y6Eu2(SiO4)(6)O-2 are (0.63, 0.37), which is close to the pure red color. (c) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码：3093 / 3099
页数：7
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