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Fine-sized BaSi3Al3O4N5:Eu2+ phosphors prepared by solid-state reaction using BaF2 flux

Published online by Cambridge University Press:  28 August 2013

Jia-Ye Tang ,
Yu-Min He ,
Lu-Yuan Hao ,
Xin Xu  and
Simeon Agathopoulos
Jia-Ye Tang
Affiliation:
CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
Yu-Min He
Affiliation:
CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
Lu-Yuan Hao
Affiliation:
CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
Xin Xu*
Affiliation:
CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, People's Republic of China
Simeon Agathopoulos
Affiliation:
Materials Science and Engineering Department, University of Ioannina, GR-451 10 Ioannina, Greece
*
a)Address all correspondence to this author. e-mail: xuxin@ustc.edu.cn
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Abstract

Fine-sized powders of BaSi3Al3O4N5:Eu2+ phosphors with high stability and improved photoluminescence properties were successfully synthesized by the traditional solid-state reaction method under a reductive atmosphere using BaF2-fluxing additives in the raw powder mixture. The produced phosphors had strong blue emission under excitation in ultraviolet (UV) and vacuum ultraviolet (VUV) light, due to the 4f 5d–4f7 transition of Eu2+ ions. X-ray diffraction, scanning electron microscopy, XANES, and the photoluminescence (PL) spectra under UV and VUV were used to characterize the as-received samples. The experimental results showed that the addition of BaF2 flux improved the crystalline regime and the PL properties of the produced phosphors. Most significantly, it allowed control of the particle size and particle size distribution in the final powders but did not jeopardize the high thermal and chemical stability of the phosphors produced. With the modification of the BaF2 flux, the blue-emitting BaSi3Al3O4N5:Eu2+ phosphors will show excellent packing and coating properties and could be a good candidate for the light-emitting diodes and plasma display panels.

Keywords

flux growthgrain sizeluminescence
Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 18 , 28 September 2013 , pp. 2598 - 2604
Copyright
Copyright © Materials Research Society 2013 

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