Lateral dye distribution with ink-jet dye doping of polymer organic light emitting diodes

Conor F. Madigan, Thomas R. Hebner, J. C. Sturm, Richard A. Register, Sandra Troian

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5 Scopus citations

Abstract

In this work we investigate the lateral dye distribution resulting from the dye doping of a thin polymer film by ink-jet printing (IJP) for the integration of color organic light emitting diodes (OLED's). The dye is found to segregate into distinct outer rings following rapid droplet evaporation, while slower evaporation rates are found to significantly reduce (or eliminate) this effect. The dye segregation phenomena are found to depend critically on the mechanisms of droplet evaporation. Good dye uniformity was obtained using a low vapor pressure solvent, and integrated, 250 micron red, green, and blue polymer organic light emitting diodes (OLED's) were fabricated with this technique. These devices had good color uniformity over most of the device area and similar electrical properties to comparable spin-coated devices without IJP.

Original languageEnglish (US)
Pages (from-to)123-128
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume625
DOIs
StatePublished - Jan 1 2000

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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