Combustion synthesis of long-persistent luminescent MAl2O4: Eu2+, R3+ (M = Sr, Ba, Ca, R = Dy, Nd and La) nanoparticles and luminescence mechanism research

被引：147

作者：

Qiu, Zifeng ^{[1
]}

Zhou, Yuanyuan ^{[1
]}

Lu, Mengkai ^{[1
]}

Zhang, Aiyu ^{[1
]}

Ma, Qian ^{[1
]}

机构：

[1] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

来源：

ACTA MATERIALIA | 2007年 / 55卷 / 08期

关键词：

combustion synthesis; nanoparticle; long-persistent; luminescence; mechanism;

D O I：

10.1016/j.actamat.2006.12.018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Eu2+, R3+ co-doped alkaline earth aluminates MAl2O4:Eu2+, R3+ (M=Sr, Ba and Ca; R=Dy, Nd and La) nanoparticles with high brightness and long afterglow have been prepared by solution-combustion synthesis at 600 degrees C without a post-annealing process for the first time. The morphologies and the phase structures of the products have been characterized by transmission electron microscopy and X-ray diffraction. The excitation and emission spectra of the products have been measured by an Edinburgh FLS920 spectrometer at room temperature. The characteristic luminescence of the as-prepared sample has been evaluated, and the reason why the wavelength changed from yellow-green to blue-green and then to blue-purple in visible range when the composition changed from SrAl2O4: Eu2+, Dy3+ to BaAl2O4:Eu2+, Nd3+ and then to CaAl2O4:Eu2+, La3+ has been explained. Furthermore, a new persistent luminescence mechanism was proposed in this article. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2615 / 2620

页数：6

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