한국정보디스플레이학회:학술대회논문집

한국정보디스플레이학회 (The Korean Infomation Display Society)
권호 표지

Synthesis of the $CaGa_2S_4:Eu^{2+}$ phosphors and Application in White LEDs

  • Kim, Jae-Myung (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Kyung-Nam (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Park, Joung-Kyu (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Chang-Hae (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Jang, Ho-Gyeom (Department of Chemistry, Korea University)
  • 발행 : 2005.07.19
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초록

The thiogallate phosphors which are well known for a long time as phosphor materials for CRT or EL device were reported. Those have high luminescent properties at long-wavelength region. Among those phosphors, the samples with divalent europium doped CaGa2S4 were prepared by a simple process under the reduction atmosphere $(5%\;H_2/\;95%\;N_2)$ without toxic gas such as H2S or CS2. The prepared phosphor shows a higher luminescent efficiency (about 120%) than that of $YAG:Ce^{3+}$ phosphor. Consequently, this phosphor is possible to be applicable to white LED lamp because of the high luminescent efficiency.

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