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Strategic-tuning of radiative excitons for efficient and stable fluorescent white organic light-emitting diodes

Author

Listed:
  • Zhongbin Wu

    (South China University of Technology
    Technische Universität Dresden)

  • Yuan Liu

    (Technische Universität Dresden)

  • Ling Yu

    (Wuhan University)

  • Chenyang Zhao

    (South China University of Technology)

  • Dezhi Yang

    (South China University of Technology)

  • Xianfeng Qiao

    (South China University of Technology)

  • Jiangshan Chen

    (South China University of Technology)

  • Chuluo Yang

    (Wuhan University)

  • Hans Kleemann

    (Technische Universität Dresden)

  • Karl Leo

    (Technische Universität Dresden)

  • Dongge Ma

    (South China University of Technology)

Abstract

The emerging thermally activated delayed fluorescence materials have great potential for efficiencies in organic light-emitting diodes by optimizing molecular structures of the emitter system. However, it is still challenging in the device structural design to achieve high efficiency and stable device operation in white organic light-emitting diodes. Here we propose a universal design strategy for thermally activated delayed fluorescence emitter-based fluorescent white organic light-emitting diodes, establishing an advanced system of “orange thermally activated delayed fluorescence emitter sensitized by blue thermally activated delayed fluorescence host” combined with an effective exciton-confined emissive layer. Compared to reference single-layer and double-layer emissive devices, the external quantum efficiency improves by 31 and 45%, respectively, and device operational stability also shows nearly fivefold increase. Additionally, a detailed optical simulation for the present structure is made, indicating the validity of the design strategy in the fluorescent white organic light-emitting diodes.

Suggested Citation

  • Zhongbin Wu & Yuan Liu & Ling Yu & Chenyang Zhao & Dezhi Yang & Xianfeng Qiao & Jiangshan Chen & Chuluo Yang & Hans Kleemann & Karl Leo & Dongge Ma, 2019. "Strategic-tuning of radiative excitons for efficient and stable fluorescent white organic light-emitting diodes," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10104-4
    DOI: 10.1038/s41467-019-10104-4
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