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Facile composite synthesis and photoluminescence of NaGd(MoO4)2: Ln3+ (Ln = Eu, Tb) submicrometer phosphors

Published online by Cambridge University Press:  31 January 2011

Bing Yan  and
Jianhua Wu
Bing Yan*
Affiliation:
Department of Chemistry, Tongji University, Shanghai 200092, China
Jianhua Wu
Affiliation:
Department of Chemistry, Tongji University, Shanghai 200092, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

NaGd(MoO4)2:Ln3+ (Ln = Eu, Tb) submicrometer phosphors have been synthesized by a composite method including the solid state reaction process at room temperature and the hydrothermal process. It is revealed that temperature and humidity have an influence on the reaction rate and that higher temperature and humidity can speed up the reaction process. Crystalline water is necessary for the solid phase reaction at room temperature. The x-ray diffraction (XRD) patterns indicate that NaGd(MoO4)2:Ln3+ (Ln = Eu, Tb) submicrometer phosphors crystallize well with the scheelite structure. Both scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images illustrate that the average grain size of NaGd(MoO4)2:Ln3+ is about 225 nm without conglomeration. The luminescent lifetime and quantum efficiency for NaGd(MoO4)2:Eu3+ are determined.

Keywords

Chemical synthesisLuminescenceOptical properties
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 1 , January 2009 , pp. 32 - 38
Copyright
Copyright © Materials Research Society 2009

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