白色発光ダイオード用蛍光体SrSi_2O_2N_2:Eu^<2+>の合成と発光特性 Preparation and Luminescence Properties of SrSi_2O_2N_2:Eu^<2+> Phosphors for White LEDs

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Author(s)

Abstract

This work has investigated luminescence properties of SrSi<sub>2</sub>O<sub>2</sub>N<sub>2</sub>: Eu<sup>2+</sup> phosphors synthesized by a new method using Sr<sub>2</sub>SiO<sub>4</sub>: Eu<sup>2+</sup> as a precursor. Compared with a conventional solid-state reaction method, this method provides increased crystallinity and luminescence efficiency. X-ray diffraction analysis has indicated that SrSi<sub>2</sub>O<sub>2</sub>N<sub>2</sub>: Eu<sup>2+</sup> formed as an almost single-phase, but chemical analysis has shown that obtained samples have an oxygen/nitrogen atomic ratio deviated from the stoichiometric composition. It can be expected that luminescence efficiency of this phosphor will be higher for the stoichiometric composition than for non-stoichiometric ones. Under 460 nm excitation, this phosphor shows an emission band peaked at 538-564 nm for varied Eu<sup>2+</sup> concentration, and shows the maximum at 15 mol% with high integrated photoluminescence intensity, which is about 1.05 times as high as that of the commercial yellow phosphor, (Y,Gd)<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>: Ce<sup>3+</sup> (P46-Y3).<br>

Journal

  • Journal of the Ceramic Society of Japan

    Journal of the Ceramic Society of Japan 115(1346), 619-622, 2007-10-01

    The Ceramic Society of Japan

References:  17

Codes

  • NII Article ID (NAID)
    110006436412
  • NII NACSIS-CAT ID (NCID)
    AA12229489
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    18820743
  • NDL Article ID
    8936383
  • NDL Source Classification
    ZP9(科学技術--化学・化学工業--無機化学・無機化学工業--セラミックス・窯業)
  • NDL Call No.
    Z78-A504
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE 
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