Article ID Journal Published Year Pages File Type
1529001 Materials Science and Engineering: B 2013 6 Pages PDF
Abstract

The red afterglow phosphors of CaWO4 doped with Eu3+, Zn2+ or (and) Si4+ were prepared by solid state reaction. All crystalline phases were identified by the X-ray powder diffraction (XRD). The photoluminescence spectra and decay curves as well as thermoluminecence (TL) curves of all samples were also investigated. In comparison to CaWO4:Eu3+ phosphor, the luminescence and afterglow properties could be improved greatly after being doped with Zn2+ or (and) Si4+ ions.

Graphical abstractEmission spectra (λex = 254 nm) of Ca0.99WO4:Eu0.013+, Ca0.98WO4:Eu0.013+,Zn0.012+, Ca0.98WO4:Eu0.013+, Si0.012+ and Ca0.97WO4:Eu0.013+, Zn0.012+, Si0.012+ samples.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Co-doping Zn2+ and Si4+ ions in CaWO4: Eu3+ could enhance the intensity of the charge band of WO42−. ► Co-doping Zn2+ and Si4+ ions in CaWO4:Eu3+ could make the energy transfer from WO42− to Eu3+ more efficiently. ► Co-doping Zn2+ and Si4 in CaWO4:Eu3++ is beneficial for the improvement the afterglow property.

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Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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