Transactions on Electrical and Electronic Materials

  • 제12권2호
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  • Pages.84-87
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  • 2011
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  • 1229-7607(pISSN)
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  • 2092-7592(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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Electrical and Optical Properties of Phosphorescent Organic Light-Emitting Devices with a TAPC Host

  • Kim, Tae-Yong (Department of Materials Engineering, Soonchunhyang University) ;
  • Moon, Dae-Gyu (Department of Materials Engineering, Soonchunhyang University)
  • 투고 : 2011.02.21
  • 심사 : 2011.03.10
  • 발행 : 2011.04.25
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초록

We fabricated phosphorescent organic light-emitting devices with a 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) host layer. Two kinds of devices, one of ITO/TAPC/TAPC:FIrpic/TAZ/LiF/Al (device A) and one of ITO/TAPC:FIrpic/TAPC/TAZ/LiF/Al (device B), were prepared to investigate electrical and optical properties. Iridium(III) bis[(4,6-difluorophenyl)-pyridinato-N,$C^{2'}$]picolinate (FIrpic) and 3-(4-biphenylyl)-4-phenyl-5-(4-tert-butylphenyl)-1,2,4-triazole (TAZ) were used as a blue phosphorescent guest material and an electron transport layer, respectively. The TAPC layer in device B strongly contributes to whitish emission, higher driving voltage, and lower current efficiency characteristics compared with device A. The mechanisms of these electrical and optical characteristics of the devices were investigated.

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