Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

2002.11a
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Pages.534-537
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2002

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)

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Temperature-dependent Electrical Properties in organic light-emitting diodes of ITO/Buffer layer/TPD/$Alq_3$/Al structure

ITO/Buffer layer/TPD/$Alq_3$/Al 구조의 유기 발광 소자에서 온도 변화에 따른 전기적 특성 연구

Chung, Dong-Hoe (Kwangwoon University) ;
Kim, Sang-Keol (Kwangwoon University) ;
Oh, Hyun-Seok (Kwangwoon University) ;
Hong, Jin-Woong (Kwangwoon University) ;
Lee, Joon-Ung (KIEEME) ;
Kim, Tae-Wan (Hongik University)

정동회 (광운대학교) ;
김상걸 (광운대학교) ;
오현석 (광운대학교) ;
홍진웅 (광운대학교) ;
이준웅 (한국전기전자재료학회) ;
김태완 (홍익대학교)

Published : 2002.11.07

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Abstract

We have studied conduction mechanism that is interpreted in terms of space charge limited current (SCLC) region and tunneling region. The OLEDs are based on the molecular compounds, N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine (TPD) as a hole transport, tris (8- hydroxyquinolinoline) aluminum(III) $(Alq_3)$ as an electron injection and transport and emitting later, copper phthalocyanine (CuPc) and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and poly(vinylcarbazole) (PVK) as a buffer layer respectively. Al was used as cathode. We manufactured reference structure that has in ITO/TPD/$Alq_3$/Al. Buffer layer effects were compared to reference structure. And we have analyzed out luminance efficiency-voltage characteristics in ITO/Buffer layer/TPD/$Alq_3$/Al with buffer-layer materials.

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