Phosphorescent dye-based supramolecules for high-efficiency organic light-emitting diodes

Kwon Hyeon Kim, Sunghun Lee, Chang Ki Moon, Sei Yong Kim, Young Seo Park, Jeong Hwan Lee, Jin Woo Lee, June Huh, Youngmin You, Jang Joo Kim

Research output: Contribution to journalArticle

207 Citations (Scopus)

Abstract

Organic light-emitting diodes (OLEDs) are among the most promising organic semiconductor devices. The recently reported external quantum efficiencies (EQEs) of 29-30% for green and blue phosphorescent OLEDs are considered to be near the limit for isotropically oriented iridium complexes. The preferred orientation of transition dipole moments has not been thoroughly considered for phosphorescent OLEDs because of the lack of an apparent driving force for a molecular arrangement in all but a few cases, even though horizontally oriented transition dipoles can result in efficiencies of over 30%. Here we use quantum chemical calculations to show that the preferred orientation of the transition dipole moments of heteroleptic iridium complexes (HICs) in OLEDs originates from the preferred direction of the HIC triplet transition dipole moments and the strong supramolecular arrangement within the co-host environment. We also demonstrate an unprecedentedly high EQE of 35.6% when using HICs with phosphorescent transition dipole moments oriented in the horizontal direction.

Original languageEnglish
Article number4769
JournalNature communications
Volume5
DOIs
Publication statusPublished - 2014 Jan 1

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Iridium
Dipole moment
Organic light emitting diodes (OLED)
iridium
Coloring Agents
light emitting diodes
dyes
Light
dipole moments
Quantum efficiency
quantum efficiency
Semiconductors
Semiconducting organic compounds
Semiconductor devices
organic semiconductors
semiconductor devices
Equipment and Supplies
dipoles
Direction compound

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Kim, K. H., Lee, S., Moon, C. K., Kim, S. Y., Park, Y. S., Lee, J. H., ... Kim, J. J. (2014). Phosphorescent dye-based supramolecules for high-efficiency organic light-emitting diodes. Nature communications, 5, [4769]. https://doi.org/10.1038/ncomms5769

Phosphorescent dye-based supramolecules for high-efficiency organic light-emitting diodes. / Kim, Kwon Hyeon; Lee, Sunghun; Moon, Chang Ki; Kim, Sei Yong; Park, Young Seo; Lee, Jeong Hwan; Lee, Jin Woo; Huh, June; You, Youngmin; Kim, Jang Joo.

In: Nature communications, Vol. 5, 4769, 01.01.2014.

Research output: Contribution to journalArticle

Kim, KH, Lee, S, Moon, CK, Kim, SY, Park, YS, Lee, JH, Lee, JW, Huh, J, You, Y & Kim, JJ 2014, 'Phosphorescent dye-based supramolecules for high-efficiency organic light-emitting diodes', Nature communications, vol. 5, 4769. https://doi.org/10.1038/ncomms5769
Kim, Kwon Hyeon ; Lee, Sunghun ; Moon, Chang Ki ; Kim, Sei Yong ; Park, Young Seo ; Lee, Jeong Hwan ; Lee, Jin Woo ; Huh, June ; You, Youngmin ; Kim, Jang Joo. / Phosphorescent dye-based supramolecules for high-efficiency organic light-emitting diodes. In: Nature communications. 2014 ; Vol. 5.
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