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Constructing high-efficiency orange-red thermally activated delayed fluorescence emitters by three-dimension molecular engineering

Author

Listed:
  • Lei Hua

    (Beijing University of Chemical Technology
    Beijing University of Chemical Technology)

  • Yuchao Liu

    (Qingdao University of Science & Technology)

  • Binbin Liu

    (Beijing University of Chemical Technology)

  • Zhennan Zhao

    (Beijing University of Chemical Technology
    Beijing University of Chemical Technology)

  • Lei Zhang

    (Beijing University of Chemical Technology)

  • Shouke Yan

    (Beijing University of Chemical Technology
    Qingdao University of Science & Technology)

  • Zhongjie Ren

    (Beijing University of Chemical Technology
    Beijing University of Chemical Technology)

Abstract

Preparing high-efficiency solution-processable orange-red thermally activated delayed fluorescence (TADF) emitters remains challenging. Herein, we design a series of emitters consisting of trinaphtho[3,3,3]propellane (TNP) core derivatized with different TADF units. Benefiting from the unique hexagonal stacking architecture of TNPs, TADF units are thus kept in the cavities between two TNPs, which decrease concentration quenching and annihilation of long-lived triplet excitons. According to the molecular engineering of TADF and host units, the excited states can further be regulated to effectively enhance spin-orbit coupling (SOC) processes. We observe a high-efficiency orange-red emission at 604 nm in one instance with high SOC value of 0.862 cm−1 and high photoluminescence quantum yield of 70.9%. Solution-processable organic light-emitting diodes exhibit a maximum external quantum efficiency of 24.74%. This study provides a universal strategy for designing high-performance TADF emitters through molecular packing and excited state regulation.

Suggested Citation

  • Lei Hua & Yuchao Liu & Binbin Liu & Zhennan Zhao & Lei Zhang & Shouke Yan & Zhongjie Ren, 2022. "Constructing high-efficiency orange-red thermally activated delayed fluorescence emitters by three-dimension molecular engineering," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35591-w
    DOI: 10.1038/s41467-022-35591-w
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    1. Bluebell H. Drummond & Naoya Aizawa & Yadong Zhang & William K. Myers & Yao Xiong & Matthew W. Cooper & Stephen Barlow & Qinying Gu & Leah R. Weiss & Alexander J. Gillett & Dan Credgington & Yong-Jin , 2021. "Electron spin resonance resolves intermediate triplet states in delayed fluorescence," Nature Communications, Nature, vol. 12(1), pages 1-11, December.
    2. A. Lennart Schleper & Kenichi Goushi & Christoph Bannwarth & Bastian Haehnle & Philipp J. Welscher & Chihaya Adachi & Alexander J. C. Kuehne, 2021. "Hot exciplexes in U-shaped TADF molecules with emission from locally excited states," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
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    4. Maria Vasilopoulou & Abd. Rashid bin Mohd Yusoff & Matyas Daboczi & Julio Conforto & Anderson Emanuel Ximim Gavim & Wilson Jose Silva & Andreia Gerniski Macedo & Anastasia Soultati & George Pistolis &, 2021. "High efficiency blue organic light-emitting diodes with below-bandgap electroluminescence," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
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    Cited by:

    1. Nan Xue & He-Ye Zhou & Ying Han & Meng Li & Hai-Yan Lu & Chuan-Feng Chen, 2024. "A general supramolecular strategy for fabricating full-color-tunable thermally activated delayed fluorescence materials," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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