Excimer-based white phosphorescent organic light emitting diodes with nearly 100 % internal quantum efficiency

Evan L. Williams, Kirsi Haavisto, Jian Li, Ghassan E. Jabbour

Research output: Contribution to journalArticlepeer-review

484 Scopus citations

Abstract

A modified host material, 2,6-bis(N-carbazolyl)pyridine, (26mCPy), which assisted in enhancing device performance, allowing for the creation of an efficient white organic light emitting diode (OLED) is reported. The basic principle for generating white light from an OLED involves combining light output from multiple emission centers. Devices were fabricated on indium tin oxide (ITO) coated glass substrates. PEDOT-PSS was filtered through a 0.45 μm filter and spin-coated on the substrate. The high quantum efficiency suggested phosphor excimer-based emission to be an efficient process. The benefits of this host are thought to be a more balanced ratio of electron and hole carriers in the emissive region or enhanced charge transfer to the dopant.

Original languageEnglish (US)
Pages (from-to)197-202
Number of pages6
JournalAdvanced Materials
Volume19
Issue number2
DOIs
StatePublished - Jan 20 2007

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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