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The Korean Infomation Display Society (한국정보디스플레이학회)
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Synthesis and Luminescence Properties of a Cyan-blue Thiosilicate-based Phosphor $SrSi_2S_5:Eu^{2+}$

  • Nakamuraa, Masayoshi (Institute of Multidisciplinary Research for Advanced Materials, Tohoku University) ;
  • Katoa, Hideki (Institute of Multidisciplinary Research for Advanced Materials, Tohoku University) ;
  • Takatsuka, Yuji (Institute of Multidisciplinary Research for Advanced Materials, Tohoku University) ;
  • Petrykinc, Valery (J. Heyrovsky of the Institute of Physical Chemistry) ;
  • Tezuka, Satoko (Institute of Multidisciplinary Research for Advanced Materials, Tohoku University) ;
  • Kakihana, Masato (Institute of Multidisciplinary Research for Advanced Materials, Tohoku University)
  • Received : 2010.11.06
  • Accepted : 2010.12.27
  • Published : 2010.12.31
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Abstract

A series of Sr-Si-S compounds was synthesized using an advanced chemical method in which the use of one solution-based process uniformly dispersed the $Eu^{2+}$ activators in the host crystals, to find new compositions that would suit phosphor applications. Particular focus was given to the Si-rich region. This led to the synthesis of a single-phase compound that showed an unknown X-ray diffraction pattern. This compound had a composition close to that of $SrSi_2S_5$. When this compound is activated with $Eu^{2+}$ ($SrSi_2S_5:Eu^{2+}$), it shows a cyan-blue emission with a main luminescence peak at 495 nm. This emission is excited by wavelengths of 250-440 nm and has a maximum excitation at 350 nm.

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References

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