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Stable and efficient CsPbI3 quantum-dot light-emitting diodes with strong quantum confinement

Author

Listed:
  • Yanming Li

    (Chinese Academy of Science
    Qianwan Institute of CNITECH, Ningbo, P. R. China)

  • Ming Deng

    (Chinese Academy of Science
    Qianwan Institute of CNITECH, Ningbo, P. R. China
    Ningbo University)

  • Xuanyu Zhang

    (Chinese Academy of Science
    Qianwan Institute of CNITECH, Ningbo, P. R. China
    University of Nottingham Ningbo China)

  • Ting Xu

    (Shenzhen Institute of Information Technology)

  • Ximeng Wang

    (University of Wisconsin-Madison)

  • Zhiwei Yao

    (Chinese Academy of Science
    Qianwan Institute of CNITECH, Ningbo, P. R. China)

  • Qiangqiang Wang

    (Chinese Academy of Science
    Qianwan Institute of CNITECH, Ningbo, P. R. China
    Ningbo University)

  • Lei Qian

    (Chinese Academy of Science
    Qianwan Institute of CNITECH, Ningbo, P. R. China
    Chinese Academy of Science)

  • Chaoyu Xiang

    (Chinese Academy of Science
    Qianwan Institute of CNITECH, Ningbo, P. R. China
    Chinese Academy of Science)

Abstract

Even though lead halide perovskite has been demonstrated as a promising optoelectronic material for next-generation display applications, achieving high-efficiency and stable pure-red (620~635 nm) emission to cover the full visible wavelength is still challenging. Here, we report perovskite light-emitting diodes emitting pure-red light at 628 nm achieving high external quantum efficiencies of 26.04%. The performance is attributed to successful synthesizing strongly confined CsPbI3 quantum dots with good stability. The strong binding 2-naphthalene sulfonic acid ligands are introduced after nucleation to suppress Ostwald ripening, meanwhile, ammonium hexafluorophosphate exchanges long chain ligands and avoids regrowth by strong binding during the purification process. Both ligands enhance the charge transport ability of CsPbI3 quantum dots. The state-of-the-art synthesis of pure red CsPbI3 quantum dots achieves 94% high quantum efficiency, which can maintain over 80% after 50 days, providing a method for synthesizing stable strong confined perovskite quantum dots.

Suggested Citation

  • Yanming Li & Ming Deng & Xuanyu Zhang & Ting Xu & Ximeng Wang & Zhiwei Yao & Qiangqiang Wang & Lei Qian & Chaoyu Xiang, 2024. "Stable and efficient CsPbI3 quantum-dot light-emitting diodes with strong quantum confinement," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50022-8
    DOI: 10.1038/s41467-024-50022-8
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    References listed on IDEAS

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    1. Huichao Zhang & Xu Fu & Ying Tang & Hua Wang & Chunfeng Zhang & William W. Yu & Xiaoyong Wang & Yu Zhang & Min Xiao, 2019. "Phase segregation due to ion migration in all-inorganic mixed-halide perovskite nanocrystals," Nature Communications, Nature, vol. 10(1), pages 1-8, December.
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