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Sub-Micrometer SiO2@ZnMoO4:Tb3+ Core-Shell Phosphors: Sol-Gel Synthesis and Characterization

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Abstract:

ZnMoO4:Tb3+ phosphor layers were grown on monodisperse SiO2 particles through a simple sol-gel method, resulting in the formation of core-shell structured SiO2@ZnMoO4:Tb3+ sub-microspheres. The resulting SiO2@ZnMoO4:Tb3+ core-shell particles were characterized by powder X-ray diffraction(XRD), field emission scanning electron microscopy(FESEM), transmission electron microscopy(TEM) and photoluminescence(PL). SEM and TEM analysis indicates that the obtained sub-microspheres have a uniform size distribution and obvious core-shell structure. SiO2@ZnMoO4:Tb3+ sub-microspheres show strong green emission under ultraviolet(275nm) illumination and the emission spectra are dominated by a 5D4→7F5 transition of Tb3+(543nm,green) from the ZnMoO4:Tb3+ shells. The optimum concentration for Tb3+ was determined to be 5 mol% of Zn2+ in ZnMoO4 host shells.

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Periodical:

Advanced Materials Research (Volume 800)

Pages:

436-439

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.800.436

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Online since:

September 2013

Authors:

Hu Yang, Xiao Bo Zhang, Juan Li, Yu Jun Lu

Keywords:

Core-Shell, SiO2@ZnMoO4:Tb3+, Sol-Gel Synthesis, Sub-Micrometer

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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