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Studies on the Characteristics of Single-Layered Organic EL Device Using a Copolymer Having Hole and Electron Transporting Moieties  

이창호 (서강대학교 공과대학 화학공학과)
김승욱 (서강대학교 공과대학 화학공학과)
오세용 (서강대학교 공과대학 화학공학과)
Publication Information
Polymer(Korea) / v.26, no.4, 2002 , pp. 543-550 More about this Journal
Abstract
We have synthesized a novel carrier transporting copolymer having triphenylamine moiety as a hole transporting unit and triazine moiety as an electron transporting unit in the polymer side chain. Single-layered organic electroluminescent (EL) devices consisted of ITO/copolymer and emitting materials (DCM, coumarin 6, DPvBi)/Al exhibited maximum external quantum efficiency when the ratio of hole transporting unit and electron transporting unit is 6:4 and the content of emitting material is 30 wt%. Especially, the devices emitted the light of red (620 nm), green (520 nm) and blue (450 nm) corresponding to the emitting materials, respectively. A maximum luminance of ITO/copolymer (6:4) and DCM (30 wt%)/Al EL device was about 500 cd/$m^2$ at a DC drive voltage of 12V.
Keywords
electroluminescence; carrier transporting copolymer; single layer; emitting material; luminance;
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