Color stability of white organic light emitting diodes as position of partially doped rubrene in DPVBi emission layer

Chan Jae Lee, Duck Kyun Choi, Jeong In Han

Research output: Contribution to journalArticlepeer-review

Abstract

Using blue emitting material, 4-bis(2,2-diphenylvinyl)-1,1-biphenyl (DPVBi) and orange dopant 5,6,11,12,-tetraphenyl-naphthacene (Rubrene), white organic light emitting devices (WOLEDs) have been fabricated. The location of rubrene doped definite thickness 50 in the emitting layer, DPVBi influences the electroluminescence (EL) and I-V characteristics are studied. As the gap from the NPD/DPVBi interface to the doped layer is increased, the intensity of blue peak enhances rapidly and turn-on voltage becomes higher. When doped layer is contacted with NPD, electroluminescence spectrum is seriously changed by applied voltage. However, devices with the gap, although this gap is very thin 0.5nm, have good stability of color index by applied voltage.

Original languageEnglish
Pages (from-to)66/[388]-74/[396]
JournalMolecular Crystals and Liquid Crystals
Volume499
DOIs
StatePublished - Feb 2009

Keywords

  • Color index
  • Doping
  • DPVBi
  • Rubrene
  • Spectrum
  • White organic light emitting diode (WOLED)

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