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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 41, Number 3
JKCSEZ 41(3)
June 20, 1997 

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 EL 소자의 특성
Sung Hoon Kim, Jin Seok Bae, Seok Hwan Hwang, Lee Soon Park

김성훈,배진석,황석환, 박이순
N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine(TPD)를 정공수송층으로, squarylium 색소를 발광체로, 액정성 폴리머를 TPD의 matrix로 사용하여 electroluminescence(EL) 소자를 제작하였다. ITO 투명전극과 Mg전극을 각각 홀주입, 전자주입 전극으로 사용하였다. Polymer/TPD 농도를 0.005wt%로 하여 spin coating법으로 소자를 제작하였을 때 가장 안정한 ELD가 얻어졌다. ITO/polymer-TPD/SQ dye/Mg 고조의 ELD는 인가전압 23 volt에서 붉은 색의 발광이 나타났으며 전류는 102mA/cm2이었다.

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/cm2 with an applied voltage of 23 V.

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