한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제39권3호
  • /
  • Pages.240-244
  • /
  • 2002
  • /
  • 1229-7801(pISSN)
  • /
  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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FED용 GdOBr:Ce 청색 형광체의 제조 및 발광특성

Preparation and Luminescent Properties of GdOBr:Ce Blue Phosphors for FED

  • 이준 (한국화학연구원 화학소재부) ;
  • 박정규 (한국화학연구원 화학소재부) ;
  • 한정화 (한라대학교 교양과정부) ;
  • 박희동 (한국화학연구원 화학소재부) ;
  • 윤석승 (충남대학교 화학과)
  • Lee, Jun (Display Phosphor Group, Korea Research Institute of Chemical Technology) ;
  • Park, Joung-Kyu (Display Phosphor Group, Korea Research Institute of Chemical Technology) ;
  • Han, Cheong-Hwa (Department of Chemistry, Halla University) ;
  • Park, Hee-Dong (Display Phosphor Group, Korea Research Institute of Chemical Technology) ;
  • Yun, Sock-Sung (Department of Chemistry, Chungnam National University)
  • 발행 : 2002.01.01
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초록

$Gd_2O_3,\;CeO_2$ 및 $NH_4Br$ 분말을 사용하여 GdOBr:Ce 형광체를 고상 반응으로 합성하였다. GdOBr:Ce 형광체는 370nm UV 여기 하에 410∼430nm의 영역에서 청색 발광스펙트럼을 보였으며, 2mol%의 Ce 농도에서 최대 발광특성을 나타냈다. FED용 형광체로의 응용 가능성을 알아보기 위해 GdOBr:Ce 형광체의 음극서 발광(CL)을 측정하였다. CL의 경우 PL과 동일한 영역인 410∼430nm에서 발광을 나타냈으며, Ce 농도가 1mol%일 때 발광의 최대치를 보였다. CL에서의 degradation 효과를 보기 위해 전자선을 10분간 조사하여 상용형광체와 비교하였다. 이로부터 GdOBr:Ce 형광체를 FED용 청색 형광체로 응용할 수 있는 가능성을 확인하였다.

The GdOBr:Ce phosphor were prepared by solid state reaction using starting chemicals of $Gd_2O_3,\;CeO_2\;and\;NH_4Br$. Under 370nm UV excitation, GdOBr:Ce phosphors showed blue emission band with a spectral range of 410∼430nm. The maximum photoluminescence(PL) emission intensity was observed at 2mol% Ce content. In order to look for feasibility of application for low voltage filed emission display, cathodoluminescence(CL) of GdOBr:Ce phosphors were measured. CL emission spectra was found to be in the range of 410∼430nm, which is the same as PL spectra. The phosphors with 1mol% Ce concentration showed the maximum CL emission intensity. For the comparison of degradation property of the prepared phosphors with commercial ones, the electron beam was applied for 10min. From the result, GdOBr:Ce could be used as a blue phosphor for FED.

키워드

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