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

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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The study on the characteristics of organic light emitting devices using Ir

Ir 착화합물을 이용한 유기발광소자의 특성연구

  • 김준호 (홍익대학교 전기정보제어공학과) ;
  • 표상우 (홍대학교 전기정보제어공학과) ;
  • 정래영 (홍익대학교 화학공학과) ;
  • 하윤경 (홍익대학교 기초과학과) ;
  • 김영관 (홍익대학교 화학공학과) ;
  • 김정수 (홍익대학교 전기정보제어공학과)
  • Published : 2002.07.01
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Abstract

The internal quantum efficiency of organic light emitting devices(OLEDs) using fluorescent organic materials is limited within 25% because of the triplet excitons which can hardly emit light. So there has been considerable interest in finding ways to obtain light emission from triplet excitons. One approach has been to add phosphorescent compounds to one of the layers in OLEDs. Then triplet excitons can transfer to these phosphorescent molecules and emit light. In this study, multilayer OLEDs with phosphorescent emitter, Iridium complexes were prepared. The devices with a structure of ITO/TPD/Ir complex doped in the host material/Alq3/Li:Al/Al were fabricated, and its electrical and optical characteristics were studied. Using various Ir complexes and the host materials, we fabricated several devices and investigated the device characteristics.

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