Blue-luminescence of nanocrystalline MWO4 (M = Ca, Sr, Ba, Pb) phosphors synthesized via a citrate complex route assisted by microwave irradiation

被引：34
|
作者：
Ryu, JH [1 ]
Yoon, JW [1 ]
Shim, KB [1 ]
机构：
[1] Hanyang Univ, Dept Ceram Engn, Seoul 133791, South Korea
来源：
ELECTROCHEMICAL AND SOLID STATE LETTERS | 2005年 / 8卷 / 05期
关键词：
D O I：
10.1149/1.1891626
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Nanocrystalline metal tungstates [MWO4 (M = Ca, Sr, Ba, Pb)] phosphors, which have scheelite structure, were successfully synthesized at low temperatures via a modified citrate complex route assisted by microwave irradiation. Crystallizations of the MWO4 (M = Ca, Sr, Ba, Pb) phosphors were detected at 400 degrees C and were completed at 500 degrees C. Most of the MWO4 (M = Ca, Sr, Ba, Pb) nanocrystallites heat-treated above 500 degrees C showed primarily spherical and homogeneous morphology with particle size of 20-30 nm. The nanocrystalline MWO4 (M = Ca, Sr, Ba, Pb) phosphors prepared at 600 degrees C exhibited a spread-eagle shape of blue luminescent spectra, which was due to Jahn-Teller effect on [WO42-] tetrahedron. (C) 2005 The Electrochemical Society.
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收藏
页码：D15 / D18
页数：4
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