Novel concept organic semiconductors useful for organic light emitting diodes

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We report a material having a very small energy gap between its singlet and triplet excited states, ΔE1-3, that realizes efficient up-conversion of triplet excitons into a singlet state, leading to efficient thermally activated delayed fluorescence (TADF). Our molecule, 2-biphenyl-4,6-bis(12-phenylindolo[2,3-a]carbazol-11-yl)-1,3,5-triazine (PIC-TRZ), broke the large energy gap restriction, providing a quite small ΔE1-3 of 0.11 eV while maintaining a high fluorescent radiative decay rate (kr∼107). The intense TADF provides a novel pathway for high efficiency electroluminescence.

Original languageEnglish
Title of host publicationSociety for Information Display - 18th International Display Workshops 2011, IDW'11
Number of pages4
Publication statusPublished - 2011
Event18th International Display Workshops 2011, IDW 2011 - Nagoya, Japan
Duration: Dec 7 2011Dec 9 2011

Publication series

NameProceedings of the International Display Workshops
ISSN (Print)1883-2490


Other18th International Display Workshops 2011, IDW 2011

All Science Journal Classification (ASJC) codes

  • Computer Vision and Pattern Recognition
  • Human-Computer Interaction
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Radiology Nuclear Medicine and imaging


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