한국정보디스플레이학회:학술대회논문집

The Korean Infomation Display Society (한국정보디스플레이학회)
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Photoluminescence Properties of $Eu^{2+}$ and $Mn^{2+}$ Activated (Ba, Sr)$_2ZnS_3$ Red Phosphor with Optimal Composition for White LED.

  • Lee, Chi-Woo (Institute of Multidisciplinary Research for Advanced Materials, Tohoku University) ;
  • Petrykin, Valery (J. Heyrovsky 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)
  • Published : 2009.10.12
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Abstract

A series of $Eu^{2+}/Mn^{2+}$ co-activated $Ba_{1.98-x}Sr_xZnS_3$ red emission phosphors was synthesized using the polymerizable complex method. The excitation spectra of the materials contain two wide bands centered at 345nm and 445nm, implicating their possible use for white LED lighting applications. In addition, substitution of Sr for Ba by 20% (x=0.4) improved drastically the emission intensity as well as the internal quantum efficiency compared to those for Sr-free $Ba_2ZnS_3:Eu^{2+}/Mn^{2+}$ phosphor.

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