Synthesis and Characterization of Monodisperse Spherical SiO2@Y2O3: Tb3+ Particles with Core-Shell Structure

Huan Wang; Ya Bing Liu; Ling Wei Kong

doi:10.4028/www.scientific.net/AMR.997.317

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 997Synthesis and Characterization of Monodisperse...

Synthesis and Characterization of Monodisperse Spherical SiO₂@Y₂O₃: Tb³⁺ Particles with Core-Shell Structure

Abstract:

Spherical submicron SiO₂ particles have been coated with luminescent Y₂O₃: Tb³⁺ layers by a Pechini sol-gel process, resulting in the formation of SiO₂@Y₂O₃: Tb³⁺ core-shell particles. The obtained core–shell phosphors have perfect spherical shape with narrow size distribution (average size ca. 450 nm), smooth surface and non-agglomeration. The thickness of shells could be easily controlled by changing the number of deposition cycles (35 nm for two deposition cycles). Under the excitation of ultraviolet, the Tb³⁺ ion mainly shows its characteristic emissions in the core-shell particles from Y₂O₃: Tb³⁺) shells. The emission intensity of Tb³⁺ can be tuned by the annealing temperature and the number of coating cycles.

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Periodical:

Advanced Materials Research (Volume 997)

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317-320

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.997.317

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Online since:

August 2014

Authors:

Huan Wang*, Ya Bing Liu, Ling Wei Kong

Keywords:

Core-Shell, Luminescent, Silica, Y₂O₃

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