한국재료학회지 (Korean Journal of Materials Research)

  • 제16권12호
  • /
  • Pages.761-765
  • /
  • 2006
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  • 1225-0562(pISSN)
  • /
  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
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LED용 BaGa2S4:Eu2+ 녹색 형광체의 합성 및 발광특성

Synthesis and Luminescent Characteristics of BaGa2S4:Eu2+ Green Phosphor for Light Emitting Diode

  • 김재명 (한국화학연구원 화학소재연구부 형광물질연구팀) ;
  • 박정규 (한국화학연구원 화학소재연구부 형광물질연구팀) ;
  • 김경남 (한국화학연구원 화학소재연구부 형광물질연구팀) ;
  • 이승재 (한국화학연구원 화학소재연구부 형광물질연구팀) ;
  • 김창해 (한국화학연구원 화학소재연구부 형광물질연구팀)
  • Kim, Jae-Myung (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Park, Joung-Kyu (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Kyung-Nam (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Lee, Seung-Jae (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Kim, Chang-Hae (Advanced Materials Division, Korea Research Institute of Chemical Technology)
  • 발행 : 2006.12.27
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초록

[ $II-III_2-(S,Se)_4$ ] structured of phosphor has been used at various field because those have high luminescent efficiency and broad emission band. Among these phosphors, the europium doped $BaGa_2S_4$ was prepared by solid-state method and had high potential application due to an emissive property of UV region. Also, the common sulfide phosphors were synthesized by using injurious $H_2S\;or\;CS_2$ gas. However, in this study $BaGa_2S_4:Eu^{2+}$ phosphor in addition to excess sulfur was prepared under at 5% $H_2/95%\;N_2$ reduction atmosphere. Thus, this process could be considered as large scale synthesis because of non-harmfulness and simplification. The photoluminescence efficiency of the prepared $BaGa_2S_4:Eu^{2+}$ phosphor increased 20% than that of commercial $SrGa_2S_4:Eu^{2+}$ phosphor. The prepared $BaGa_2S_4:Eu^{2+}$ could be applied to green phosphor for white LED of three wavelengths.

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