Efficient organic light-emitting diodes through up-conversion from triplet to singlet excited states of exciplexes

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Abstract

Enhanced electroluminescence efficiency is achieved in organic light-emitting diodes through delayed fluorescence of the exciplex state formed between 4,4′,4′′-tris[3-methylphenyl(phenyl)amino]- triphenylamine (m-MTDATA) as an electron-donating material and 2,8-bis(diphenylphosphoryl)dibenzo-[b,d]thiophene (PPT) as an electron-accepting material. The devices exhibited maximum external electroluminescence quantum and power efficiencies of 10.0 and 47.0 lm/W, respectively.

Original languageEnglish
Article number023306
JournalApplied Physics Letters
Volume101
Issue number2
DOIs
Publication statusPublished - Jul 9 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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