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.

引用

页码：D15 / D18

页数：4

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