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Journal of Inorganic Materials

Journal of Inorganic Materials >

2010 , Vol. 15 >Issue 2: 120 - 124

DOI: https://doi.org/10.3724/SP.J.1077.2010.00120

Research Paper

Synthesis and Luminescence Properties of Mono-disperse Spherical SiO2@SrAl2Si2O8∶Eu2+ Particles with Core-shell Structure

  • LI Yi-Dong ,
  • CHEN Xiao-Bo ,
  • AI Peng-Fei ,
  • LIU Ying-Liang
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  • (Institute of Nano-chemistry, Department of Chemistry, Jinan University, Guangzhou 510632, China)

Received date: 2009-06-02

  Revised date: 2009-07-19

  Online published: 2010-02-20

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Abstract

Nanocrystalline SrAl2Si2O8∶Eu2+ phosphor layers were coated on non-aggregated, mono-dispersed, and spherical SiO2 particles by sol-gel process at relatively low temperature, resulting in the formation of core-shell SiO2@SrAl2Si2O8∶Eu2+ particles. X-ray diffraction, scanning electron microscope (SEM), transmission electron microscope (TEM), as well as photoluminescence were utilized to characterize the core-shell structured SiO2@SrAl2Si2O8∶Eu2+ particles. XRD analysis confirms the formation of SiO2@SrAl2Si2O8∶Eu2+ particles, it indicates that the SrAl2Si2O8∶Eu2+ phosphor layers coated on SiO2 particles are hexagonal crystal phase. SEM and TEM indicate that the roughness of the SiO2 particles’ surface obviously increases. The obtained core-shell phosphors consist of well dispersed submicron spherical particles with a narrow size distribution, and the thickness of coated layers is about 20-30nm. The core-shell particles show strong blue emission, which is ascribed to transition from 5d to 4f (around 440nm) of Eu2+ under the excitation of ultraviolet light (361nm). The excitation and emission spectra show that Eu2+ can be incorporated into SrAl2Si2O8 effectively. The study of optical properties suggest that these particles may be used in plasma display panel (PDP) device and other luminescent apparatus.

Key words： SiO2@SrAl2Si2O8∶Eu2+; core-shell structure; sol-gel process; blue phosphor

Cite this article

LI Yi-Dong , CHEN Xiao-Bo , AI Peng-Fei , LIU Ying-Liang . Synthesis and Luminescence Properties of Mono-disperse Spherical SiO2@SrAl2Si2O8∶Eu2+ Particles with Core-shell Structure[J]. Journal of Inorganic Materials, 2010 , 15(2) : 120 -124 . DOI: 10.3724/SP.J.1077.2010.00120

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