E2M - 전기 전자와 첨단 소재 (Electrical & Electronic Materials)

  • 제8권6호
  • /
  • Pages.752-758
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  • 1995
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  • 2982-6268(pISSN)
  • /
  • 2982-6306(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
권호 표지

CaS:Eu,S 전계발광소자의 특성

Characteristics of CaS:Eu,S electroluminescent devices

  • 조제철 (전남대학교 전기공학과) ;
  • 유용택 (전남대학교 전자공학과)
  • 발행 : 1995.11.01
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초록

Red emitting CaS:Eu,S electroluminescent(EL) device prepared at 550.deg. C by an electron-beam evaporation technique, demonstrated luminance of 175cd/m$\^$2/ and efficiency of 0.311m/W with 3kHz drive. Luminance was increased with the increase of applied voltage and frequency. From the results of the PL spectrum and the EL spectrum, the CaS:Eu, S device showed emission peak near 640nm resulted from the transition of EU$\^$2+/ 4f$\^$6/5d.rarw.4f$\^$7/. The capacitance of the phosphor layer from the Sawyer-Tower circuit was 10.5nF/cm$\^$2/.

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