Spectral broadening in electroluminescence of white organic light-emitting diodes based on complementary colors

Young Min Kim, Young Wook Park, Jin Hwan Choi, Byeong Kwon Ju, Jae Hoon Jung, Jai Kyeong Kim

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The authors report the optical and electroluminescent (EL) properties of white organic light-emitting diodes (OLEDs) which have two emitters with similar structures: 1, 1, 4, 4-tetraphenyl-1, 3-butadiene and 2,9-dimethyl-4,7- diphenyl-1,10-phenanthroline have an emission peak of 400 nm around the near ultraviolet, and tris-(8-hydroxyquinoline) aluminum doped with 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran has an emission peak of 580 nm producing a yellow color. The EL spectra of the white OLED have shown a broadening through visual range from 400 to 780 nm. This spectral broadening is related to an exciplex emission at the organic solid interface.

Original languageEnglish
Article number033506
JournalApplied Physics Letters
Issue number3
Publication statusPublished - 2007 Jan 29


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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