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Effect of Ph3PO or BCP Between Electron Transport and Emission Layers on the Driving Voltage of Organic Light Emitting Diode

전자수송층과 발광층 사이의 Ph3PO 혹은 BCP가 유기발광다이오드의 구동전압에 미치는 영향

  • Ha, Mi-Young (Department of Materials Engineering, Soonchunhyang University) ;
  • Moon, Dae-Gyu (Department of Materials Engineering, Soonchunhyang University)
  • 하미영 (순천향대학교 디스플레이신소재공학과) ;
  • 문대규 (순천향대학교 디스플레이신소재공학과)
  • Received : 2010.04.05
  • Accepted : 2011.07.22
  • Published : 2011.08.01

Abstract

We have investigated the effect of organic thin film on the driving voltage of OLED (organic light emitting diode) by inserting a 5 nm thick 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) or triphenylphosphineoxide ($Ph_3PO$) between tris-(8-hydroxyquinoline)aluminum ($Alq_3$) electron transport layer and 4,4'-bis(2,2'-diphyenylvinyl)-1,1'-biphenyl (DPVBi) emission layer. The device with 5 nm thick $Ph_3PO$ layer exhibited higher maximum current efficiency and lower driving voltage than the device with BCP layer, resulting from better electron injection from $Alq_3$ to DPVBi in the device with $Ph_3PO$ layer.

Keywords

References

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