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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Properties of Organic light-emitting Diodes with various Electron-transporting layers

전자 수송층에 따른 유기 발광 다이오드 소자의 전기적 특성

  • 이석재 (홍익대학교, 정보디스플레이공학과) ;
  • 박정현 (홍익대학교, 정보디스플레이공학과) ;
  • 서지현 (홍익대학교, 정보디스플레이공학과) ;
  • 이금희 (성균관대학교, 화학과) ;
  • 윤승수 (성균관대학교, 화학과) ;
  • 김영관 (홍익대학교, 정보디스플레이공학과)
  • Published : 2007.11.01
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Abstract

Organic light-emitting diodes (OLEDs) were fabricated with the electron dominant complex, 4,7-diphenyl-1, 10-phenanthroline (Bphen) into the traditional electron transporting material of tris (S-hydroxyquinoline) aluminum $(Alq_3)$, neat $Alq_3$ and Bphen as electron-transporting layers (ETLs), respectively. Use of the Bphen material results in efficient electron injection and transport, allowing for high luminous efficiency devices. The devices with neat $Alq_3$(Device1), 1:1 mixed $Alq_3$ : Bphen(Device2), and Bphen(Device3) have efficiency of 15.3cd/A, 16.9cd/A, 20.9cd/A, respectively, at $20\;mA/cm^2$. The efficiency characteristic of device with Bphen is best, but the device that is satisfied high efficiency and stability at once is observed in Device2.

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