کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1332661 1500129 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Luminescence properties of core-shell structured SiO2@CaMoO4:Eu3+ phosphor
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Luminescence properties of core-shell structured SiO2@CaMoO4:Eu3+ phosphor
چکیده انگلیسی

Uniform SiO2@CaMoO4:Eu3+ red phosphor has been synthesized by sol-gel method, and its luminescence properties have been studied by fluorescence spectrometer. The structure and morphology of the SiO2@CaMoO4:Eu3+ red phosphor have been investigated by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), and FT-IR spectrometer. Results indicate that phosphor particles have a core-shell structure and the thickness of the SiO2-shell is about 60 nm. In addition, the luminescent intensity of SiO2@CaMoO4:Eu3+ red phosphor has been greatly enhanced with respect to CaMoO4:Eu3+ phosphor. But the lifetime τ value of SiO2-coated CaMoO4:Eu3+ is slightly smaller than that of non-coated CaMoO4:Eu3+.

A SiO2 nano-layer with thickness of 60 nm and good uniformity was successfully coated on the surface of CaMoO4:Eu3+ phosphor. This coating greatly increases luminescent intensity of the phosphor.Figure optionsDownload as PowerPoint slideHighlights
► SiO2@CaMoO4:Eu3+ was successfully synthesized by sol-gel method.
► The SiO2 nano-layer increases luminescent intensity of the phosphor.
► The SiO2 nano-layer reduces fluorescence lifetime of the phosphor.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 187, March 2012, Pages 109–113
نویسندگان
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