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

Author

Listed:
  • Kwon-Hyeon Kim

    (WCU Hybrid Materials Program, Seoul National University)

  • Sunghun Lee

    (WCU Hybrid Materials Program, Seoul National University)

  • Chang-Ki Moon

    (Seoul National University)

  • Sei-Yong Kim

    (Seoul National University)

  • Young-Seo Park

    (Seoul National University)

  • Jeong-Hwan Lee

    (WCU Hybrid Materials Program, Seoul National University)

  • Jin Woo Lee

    (Samsung Total Petrochemicals, Daesan-eup)

  • June Huh

    (Korea University)

  • Youngmin You

    (Kyung Hee University)

  • Jang-Joo Kim

    (WCU Hybrid Materials Program, Seoul National University
    Seoul National University)

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.

Suggested Citation

  • 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, 2014. "Phosphorescent dye-based supramolecules for high-efficiency organic light-emitting diodes," Nature Communications, Nature, vol. 5(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5769
    DOI: 10.1038/ncomms5769
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    Cited by:

    1. Dong-Hyeok Kim & Seung-Je Woo & Claudia Pereyra Huelmo & Min-Ho Park & Aaron M. Schankler & Zhenbang Dai & Jung-Min Heo & Sungjin Kim & Guy Reuveni & Sungsu Kang & Joo Sung Kim & Hyung Joong Yun & Jin, 2024. "Surface-binding molecular multipods strengthen the halide perovskite lattice and boost luminescence," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    2. Sudhir Kumar & Tommaso Marcato & Frank Krumeich & Yen-Ting Li & Yu-Cheng Chiu & Chih-Jen Shih, 2022. "Anisotropic nanocrystal superlattices overcoming intrinsic light outcoupling efficiency limit in perovskite quantum dot light-emitting diodes," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    3. Ningning Tang & Jiadong Zhou & Liangxuan Wang & Matthias Stolte & Guojing Xie & Xinbo Wen & Linlin Liu & Frank Würthner & Johannes Gierschner & Zengqi Xie, 2023. "Anomalous deep-red luminescence of perylene black analogues with strong π-π interactions," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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