Organic light-emitting diodes employing efficient reverse intersystem crossing for triplet-to-singlet state conversion

Kenichi Goshi, Kou Yoshida, Keigo Sato, Chihaya Adachi

Research output: Contribution to journalArticle

722 Citations (Scopus)

Abstract

Light emission from organic light-emitting diodes that make use of fluorescent materials have an internal quantum efficiency that is typically limited to no more than 25% due to the creation of non-radiative triplet excited states. Here, we report the use of electron-donating and electron-accepting molecules that allow a very high reverse intersystem crossing of 86.5% between non-radiative triplet and radiative singlet excited states and thus a means of achieving enhanced electroluminescence. Organic light-emitting diodes made using m-MTDATA as the donor material and 3TPYMB as the acceptor material demonstrate that external quantum efficiencies as high as 5.4% can be achieved, and we believe that the approach will offer even higher values in the future as a result of careful material selection.

Original languageEnglish
Pages (from-to)253-258
Number of pages6
JournalNature Photonics
Volume6
Issue number4
DOIs
Publication statusPublished - Apr 1 2012

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Organic light emitting diodes (OLED)
quantum efficiency
light emitting diodes
acceptor materials
donor materials
materials selection
Quantum efficiency
Excited states
electroluminescence
excitation
light emission
electrons
Electrons
Light emission
Electroluminescence
molecules
Molecules

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

Cite this

Organic light-emitting diodes employing efficient reverse intersystem crossing for triplet-to-singlet state conversion. / Goshi, Kenichi; Yoshida, Kou; Sato, Keigo; Adachi, Chihaya.

In: Nature Photonics, Vol. 6, No. 4, 01.04.2012, p. 253-258.

Research output: Contribution to journalArticle

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