High performance organic light-emitting diodes based on thermally-activated delayed fluorescence materials

Research output: Contribution to journalReview article

Abstract

A brief review is given on the unique features of thermally activated delayed fluorescence (TADF). We demonstrate a novel pathway to open an ultimate electroluminescence (EL) efficiency by using simple aromatic compounds displaying efficient TADF molecules. We found that a proper design of organic molecules enables the formation of a small energy gap between singlet and triplet excited states, resulting in the enhanced T1 to S1 reverse intersystem crossing. We also demonstrate a novel pathway for highly efficient fluorescence-based light-emitting diodes by applying the concept of TADF as an exciton generation source.

Original languageEnglish
Pages (from-to)73-78
Number of pages6
JournalJournal of the Vacuum Society of Japan
Volume58
Issue number3
DOIs
Publication statusPublished - Jan 1 2015

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Organic light emitting diodes (OLED)
light emitting diodes
Fluorescence
fluorescence
Molecules
aromatic compounds
Aromatic compounds
Electroluminescence
Excited states
Excitons
electroluminescence
Light emitting diodes
molecules
Energy gap
excitons
excitation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Instrumentation
  • Surfaces and Interfaces
  • Spectroscopy

Cite this

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abstract = "A brief review is given on the unique features of thermally activated delayed fluorescence (TADF). We demonstrate a novel pathway to open an ultimate electroluminescence (EL) efficiency by using simple aromatic compounds displaying efficient TADF molecules. We found that a proper design of organic molecules enables the formation of a small energy gap between singlet and triplet excited states, resulting in the enhanced T1 to S1 reverse intersystem crossing. We also demonstrate a novel pathway for highly efficient fluorescence-based light-emitting diodes by applying the concept of TADF as an exciton generation source.",
author = "Hajime Nakanotani and Chihaya Adachi",
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N2 - A brief review is given on the unique features of thermally activated delayed fluorescence (TADF). We demonstrate a novel pathway to open an ultimate electroluminescence (EL) efficiency by using simple aromatic compounds displaying efficient TADF molecules. We found that a proper design of organic molecules enables the formation of a small energy gap between singlet and triplet excited states, resulting in the enhanced T1 to S1 reverse intersystem crossing. We also demonstrate a novel pathway for highly efficient fluorescence-based light-emitting diodes by applying the concept of TADF as an exciton generation source.

AB - A brief review is given on the unique features of thermally activated delayed fluorescence (TADF). We demonstrate a novel pathway to open an ultimate electroluminescence (EL) efficiency by using simple aromatic compounds displaying efficient TADF molecules. We found that a proper design of organic molecules enables the formation of a small energy gap between singlet and triplet excited states, resulting in the enhanced T1 to S1 reverse intersystem crossing. We also demonstrate a novel pathway for highly efficient fluorescence-based light-emitting diodes by applying the concept of TADF as an exciton generation source.

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