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Luminescence enhancement of Eu3+-activated La2Mo2O9 red-emitting phosphor through chemical substitution

Published online by Cambridge University Press:  12 September 2011

Xianghong He ,
Mingyun Guan ,
Chunyong Zhang ,
Tongming Shang ,
Ning Lian  and
Quanfa Zhou
Xianghong He*
Affiliation:
School of Chemistry and Environmental Engineering, Jiangsu Teachers University of Technology, Changzhou, Jiangsu 213001, China; and Jiangsu Province Key Laboratory of Precious Metal Chemistry and Technology, Changzhou, Jiangsu 213001, China
Mingyun Guan
Affiliation:
School of Chemistry and Environmental Engineering, Jiangsu Teachers University of Technology, Changzhou, Jiangsu 213001, China; and Jiangsu Province Key Laboratory of Precious Metal Chemistry and Technology, Changzhou, Jiangsu 213001, China
Chunyong Zhang
Affiliation:
School of Chemistry and Environmental Engineering, Jiangsu Teachers University of Technology, Changzhou, Jiangsu 213001, China; and Jiangsu Province Key Laboratory of Precious Metal Chemistry and Technology, Changzhou, Jiangsu 213001, China
Tongming Shang
Affiliation:
School of Chemistry and Environmental Engineering, Jiangsu Teachers University of Technology, Changzhou, Jiangsu 213001, China; and Jiangsu Province Key Laboratory of Precious Metal Chemistry and Technology, Changzhou, Jiangsu 213001, China
Ning Lian
Affiliation:
School of Chemistry and Environmental Engineering, Jiangsu Teachers University of Technology, Changzhou, Jiangsu 213001, China; and Jiangsu Province Key Laboratory of Precious Metal Chemistry and Technology, Changzhou, Jiangsu 213001, China
Quanfa Zhou
Affiliation:
School of Chemistry and Environmental Engineering, Jiangsu Teachers University of Technology, Changzhou, Jiangsu 213001, China; and Jiangsu Province Key Laboratory of Precious Metal Chemistry and Technology, Changzhou, Jiangsu 213001, China
*
a)Address all correspondence to this author. e-mail address: hexh@jstu.edu.cn
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Abstract

A series of red-emitting phosphors with compositions of La2(Mo1−zSiz)2O9:0.05Eu3+ (0 ≤ z ≤ 0.10) with strong near-UV absorption were prepared by solid-state method. The structure and luminescence properties were investigated by x-ray powder diffraction, UV–vis diffuse reflectivity, and photoluminescence spectra. The luminescent properties as a function of Si4+ concentrations were systematically studied. Under excitation of a wide range near-UV (250–430 nm) or blue light, Si4+-doped series phosphors exhibit characteristic red emission of Eu3+ peaked at 615 nm. The incorporation of Si4+ into La2Mo2O9:0.05Eu3+ phosphor leads to the improvement of the excitation broad band and sharp peaks, as well as the broadening of charge transfer band. Appropriate amount of Si4+ doping can enhance the red luminescence intensity. Finally, the possible reasons for the luminescence enhancement via the corporation of Si4+ were explained.

Keywords

Chemical substitutionEuLuminescence
Type
Materials Communications
Information
Journal of Materials Research , Volume 26 , Issue 18 , 28 September 2011 , pp. 2379 - 2383
Copyright
Copyright © Materials Research Society 2011

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