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Research Article | Open Access

Luminescence enhancement of CaMoO4:Eu3+ phosphor by charge compensation using microwave sintering method

Zhiping ZHOU, Yingsen YU, Xiaotang LIU( ), Weihao YE, Guangqi HU, Bingfu LEI, Yun YAN
College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
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Abstract

CaMoO4:Eu3+ and CaMoO4:Eu3+,A+ (A=Li, Na, K) phosphors for light-emitting diode (LED) applications have been prepared by microwave sintering method (MSM), and their structure and luminescence properties are investigated. The influences of microwave reaction time and concentration of different kinds of charge compensation A+ and Eu3+ on luminescence have also been discussed. The samples emit a red luminescence at 615 nm attributed to the 5D0→7F2 transition of Eu3+ under 464 nm excitation. It is observed that adding charge compensation A+ in the sample synthesis increases luminescence intensity. The optimized sample made with 32 mol% Li+ and 32 mol% Eu3+ has an enhancement factor of 4 in photoluminescence compared to the sample made without charge compensation. The CIE (Commission Internationale de l´Eclairage) coordinates of Ca0.36MoO4:0.32Eu3+,0.32Li+ are x=0.661 and y=0.339, which indicate that the obtained phosphor can be a promising red color candidate for white LED fabrications.

Keywords

CaMoO4:Eu3+ phosphorluminescence enhancementcharge compensationmicrowave sinteringwhite light-emitting diode (LED)

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Journal of Advanced Ceramics
Volume 4 Issue 4,
December 2015
Pages 318-325
DOI: 10.1007/s40145-015-0168-7
Cite this article:
ZHOU Z, YU Y, LIU X, et al. Luminescence enhancement of CaMoO4:Eu3+ phosphor by charge compensation using microwave sintering method. Journal of Advanced Ceramics, 2015, 4(4): 318-325. https://doi.org/10.1007/s40145-015-0168-7

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Received: 27 May 2015
Revised: 09 August 2015
Accepted: 25 August 2015
Published: 02 December 2015
© The author(s) 2015

This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
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