Syntheses of Improved Polymer/Organic Materials for Electroluminescence(EL) Device and Electro-Optical Characteristics(Ⅱ) Properties of EL Device using Squarylium Dye as Emitting Material

고기능 EL소자용 고분자/유기 재료의 합성 및 전기 광학적 특성(Ⅱ) Squarylium 색소를 이용한 EL소자의 특성

  • Kim, Sung Hoon (Department of Dyeing and Finshing, Kyunpook National University) ;
  • Bae, Jin Seok (Department of Dyeing and Finshing, Kyunpook National University) ;
  • Hwang, Seok Hwan (Department of Dyeing and Finshing, Kyunpook National University) ;
  • Park, Lee Soon (Department of Polymer Science, Kyunpook National University)
  • 김성훈 (경북대학교 공과대학 염색공학과) ;
  • 배진석 (경북대학교 공과대학 염색공학과) ;
  • 황석환 (경북대학교 공과대학 염색공학과) ;
  • 박이순 (경북대학교 공과대학 고분자공학과)
  • Published : 19970300


Organic electroluminescence devices(ELD) were fabricated using by molecularly doped method with N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine(TPD) as a hole transport agent, squarylium dye as an emitting agent, and side chain liquid crystalline polymer(MCH) as matrix for TPD. An indium-tin-oxide(ITO) coated glass and an Mg electrode were used as the hole and the electron injecting electrode, respectively. The highest stability of ELD was obtained by spin coating method using dichloroethane as a solvent at a polymer/TPD concentration of 0.005 wt%. For the EL cell with ITO/polymer-TPD/SQ dye/Mg structure, we achieved light red luminescence at a current of 102 mA/$cm^2$ with an applied voltage of 23 V.



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