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Emission Characteristics of Polymer Blue Organic Light Emitting Devices on the Plastic Substrates

플라스틱 기판을 이용한 고분자 청색 유기발광다이오드의 발광 특성

  • Jung, Jae-Hoon (Department of Advanced Materials Engineering, Soonchunhyang University) ;
  • Moon, Dae-Gyu (Department of Advanced Materials Engineering, Soonchunhyang University)
  • 정재훈 (순천향대학교 신소재공학과) ;
  • 문대규 (순천향대학교 신소재공학과)
  • Received : 2013.07.23
  • Accepted : 2013.08.20
  • Published : 2013.09.01

Abstract

We have fabricated blue phosphorescent organic light-emitting devices (OLEDs) on a plastic substrate. The solution coated poly (9-vinylcarbazole) (PVK) host doped with Bis (3,5-difluoro-2-(2-pyridyl)phenyl_(2-carboxypyridyl)irdium(III) (FIrPic) guest molecules was used as an hole transporting emission layer. The device structure was ITO/PVK:FIrpic (50 nm, xwt%)/TAZ 50 nm)/LiF (0.5 nm)/Al (100 nm). The concentration of FIrpic molecule was varied from 1 wt% to 10 wt%. The OLED on plastic substrate exhibited maximum current efficiency of 18 cd/A with 5 wt% FIrpic molecules were doped into the PVK layer.

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