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Harmonization of rapid triplet up-conversion and singlet radiation enables efficient and stable white OLEDs

Author

Listed:
  • Manli Huang

    (Shenzhen University
    Shenzhen University)

  • Zhanxiang Chen

    (Shenzhen University)

  • Jingsheng Miao

    (Shenzhen University)

  • Siyuan He

    (Shenzhen University)

  • Wei Yang

    (Shenzhen University)

  • Zhongyan Huang

    (Shenzhen University)

  • Yang Zou

    (Shenzhen University)

  • Shaolong Gong

    (Wuhan University)

  • Yao Tan

    (Wuhan University)

  • Chuluo Yang

    (Shenzhen University
    Shenzhen University)

Abstract

White organic light-emitting diodes (WOLEDs) hold significant promise in illumination and displays, but achieving high efficiency while maintaining stability is an ongoing challenge. Here, we strategically combine a blue donor-acceptor thermally activated delayed fluorescence (TADF) emitter featuring rapid reverse intersystem crossing rate and a yellow multi-resonance TADF emitter renowned for the fast radiative transition process to achieve warm WOLEDs with exceptional power efficiency exceeding 190 lm W−1 and external quantum efficiency (EQE) of 39%, setting records for WOLEDs. Meanwhile, these devices also exhibit an extended operational lifetime (LT80) of 446 h at an initial luminance of 1000 cd m−2. Another group of blue and yellow emitters based on our strategy achieves a standard white emission and a high EQE of 35.6%, confirming the universality of our strategy. This work presents a versatile strategy to harmonize singlet exciton radiation and triplet exciton up-conversion, thus achieving a win-win situation of efficiency and stability.

Suggested Citation

  • Manli Huang & Zhanxiang Chen & Jingsheng Miao & Siyuan He & Wei Yang & Zhongyan Huang & Yang Zou & Shaolong Gong & Yao Tan & Chuluo Yang, 2024. "Harmonization of rapid triplet up-conversion and singlet radiation enables efficient and stable white OLEDs," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-52401-7
    DOI: 10.1038/s41467-024-52401-7
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    References listed on IDEAS

    as
    1. Yunhu Wang & Kunpeng Wang & Fangxu Dai & Kai Zhang & Haifeng Tang & Lei Wang & Jun Xing, 2022. "A warm-white light-emitting diode based on single-component emitter aromatic carbon nitride," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. Chunmiao Han & Ruiming Du & Hui Xu & Sanyang Han & Peng Ma & Jinkun Bian & Chunbo Duan & Ying Wei & Mingzhi Sun & Xiaogang Liu & Wei Huang, 2021. "Ladder-like energy-relaying exciplex enables 100% internal quantum efficiency of white TADF-based diodes in a single emissive layer," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    3. Yiru Sun & Noel C. Giebink & Hiroshi Kanno & Biwu Ma & Mark E. Thompson & Stephen R. Forrest, 2006. "Management of singlet and triplet excitons for efficient white organic light-emitting devices," Nature, Nature, vol. 440(7086), pages 908-912, April.
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