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Hyperfluorescence circularly polarized OLEDs consisting of chiral TADF sensitizers and achiral multi-resonance emitters

Author

Listed:
  • Letian Chen

    (South China University of Technology)

  • Peng Zou

    (South China University of Technology)

  • Jinke Chen

    (South China University of Technology)

  • Letian Xu

    (South China University of Technology)

  • Ben Zhong Tang

    (The Chinese University of Hong Kong)

  • Zujin Zhao

    (South China University of Technology)

Abstract

Developing circularly polarized organic light-emitting diodes (CP-OLEDs) that simultaneously achieve narrow-spectrum emission and high electroluminescence (EL) efficiency remains a formidable challenge. This work prepares two pairs of efficient circularly polarized thermally activated delayed fluorescence (CP-TADF) materials, featuring high photoluminescence quantum yields, short delayed fluorescence lifetimes, good luminescence dissymmetry factors and large horizontal dipole ratios. They can function as emitters for efficient sky-blue CP-OLEDs, providing high maximum external quantum efficiencies (ηext,maxs) (33.8%) and good EL dissymmetry factors (gELs) (−2.64 × 10−3). More importantly, they can work as sensitizers for achiral multi-resonance (MR) TADF emitters, furnishing high-performance blue and green hyperfluorescence (HF) CP-OLEDs with intense narrow-spectrum CP-EL and good ηext,maxs (31.4%). Moreover, tandem HF CP-OLEDs are fabricated for the first time by employing CP-TADF sensitizers and achiral MR-TADF emitters, which radiate narrow-spectrum CP-EL with an extraordinary ηext,maxs (51.3%) and good gELs (4.87 × 10−3). The circularly polarized energy transfer as well as chirality-induced spin selectivity effect of CP-TADF sensitizers are considered to contribute greatly to the generation of efficient CP-EL from achiral MR-TADF emitters. This work not only explores efficient CP-TADF materials but also provides a facile approach to construct HF CP-OLEDs with achiral MR-TADF emitters.

Suggested Citation

  • Letian Chen & Peng Zou & Jinke Chen & Letian Xu & Ben Zhong Tang & Zujin Zhao, 2025. "Hyperfluorescence circularly polarized OLEDs consisting of chiral TADF sensitizers and achiral multi-resonance emitters," Nature Communications, Nature, vol. 16(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-56923-6
    DOI: 10.1038/s41467-025-56923-6
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    References listed on IDEAS

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    1. Siyang Lin & Yuqi Tang & Wenxin Kang & Hari Krishna Bisoyi & Jinbao Guo & Quan Li, 2023. "Photo-triggered full-color circularly polarized luminescence based on photonic capsules for multilevel information encryption," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    2. Longjiang Xing & Jianghui Wang & Wen-Cheng Chen & Bo Liu & Guowei Chen & Xiaofeng Wang & Ji-Hua Tan & Season Si Chen & Jia-Xiong Chen & Shaomin Ji & Zujin Zhao & Man-Chung Tang & Yanping Huo, 2024. "Highly efficient pure-blue organic light-emitting diodes based on rationally designed heterocyclic phenophosphazinine-containing emitters," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
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