Synthesis of high efficient Ca 2SiO 4:Eu 2 green emitting phosphor by a liquid phase precursor method

Y. Y. Luo, D. S. Jo, K. Senthil, S. Tezuka, M. Kakihana, K. Toda, T. Masaki, D. H. Yoon

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    53 Citations (Scopus)

    Abstract

    Green emitting Eu 2-doped Ca 2SiO 4 phosphors were synthesized by three different methods (a conventional solid state reaction (SSR) method, a novel liquid phase precursor approach using SiO 2 sol (LPP-SiO 2(sol)) and water-soluble silicon compound (LPP-WSS)). The obtained phosphors exhibited a broad excitation spectrum ranging from 225 to 450 nm and a strong green emission peak at 502 nm due to the 4f 65d 1→4f 7( 8S 7/2) transition of Eu 2. The highest luminescent intensity was obtained for the samples fired at 1100 °C. The dependence of luminescence properties on Eu 2 concentration for the phosphors synthesized using LPP-WSS method was also examined from 0.1 to 5.0 mol% and the maximum emission intensity was observed at 3.0 mol% Eu 2. A detailed analysis using various characterizations revealed that phosphors produced by the LPP-WSS process exhibited more homogenous phase distribution and higher luminescence intensity than those from the other two processes, which suggested the potential application of Ca 2SiO 4:Eu 2 in white light-emitting diodes and fluorescence lamps.

    Original languageEnglish
    Pages (from-to)68-74
    Number of pages7
    JournalJournal of Solid State Chemistry
    Volume189
    DOIs
    Publication statusPublished - 2012 May

    Keywords

    • Eu concentration
    • Luminescence
    • Silicate phosphor
    • Thermal analysis
    • White LEDs

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Ceramics and Composites
    • Condensed Matter Physics
    • Physical and Theoretical Chemistry
    • Inorganic Chemistry
    • Materials Chemistry

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