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Thermal management towards ultra-bright and stable perovskite nanocrystal-based pure red light-emitting diodes

Author

Listed:
  • Hongjin Li

    (Zhejiang University
    Zhejiang University)

  • Xiaofang Zhu

    (Zhejiang University
    Zhejiang University)

  • Dingshuo Zhang

    (Zhejiang University
    Zhejiang University)

  • Yun Gao

    (Zhejiang University
    Zhejiang University)

  • Yifeng Feng

    (Zhejiang University
    Zhejiang University)

  • Zichao Ma

    (Zhejiang University
    Zhejiang University)

  • Jingyun Huang

    (Zhejiang University
    Zhejiang University)

  • Haiping He

    (Zhejiang University
    Zhejiang University
    Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering)

  • Zhizhen Ye

    (Zhejiang University
    Zhejiang University
    Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering)

  • Xingliang Dai

    (Zhejiang University
    Zhejiang University
    Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering)

Abstract

Despite the promising candidacy of perovskite nanocrystals for light-emitting diodes, their pure red electroluminescence is hindered by low saturated luminance, severe external quantum efficiency roll-off, and inferior operational stability. Here, we report ultra-bright and stable pure red light-emitting diodes by manipulating Joule heat generation in the nanocrystal emissive layer and thermal management within the device. Diphenylphosphoryl azide-mediated regulation of the nanocrystal surface synergistically enhances the optical properties and carrier transport of the emissive layer, enabling reduced Joule heat generation and thus lowering the working temperature. These merits inhibit ion migration of the CsPb(Br/I)3 nanocrystal film, promising excellent spectra stability. Combined with the highly thermal-conductive sapphire substrates and implementation of pulse-driving mode, the pure red light-emitting diodes exhibit an ultra-bright luminance of 390,000 cd m−2, a peak external quantum efficiency of 25%, suppressed efficiency roll-off, an operational half-life of 20 hours, and superior spectral stability within 15 A cm−2.

Suggested Citation

  • Hongjin Li & Xiaofang Zhu & Dingshuo Zhang & Yun Gao & Yifeng Feng & Zichao Ma & Jingyun Huang & Haiping He & Zhizhen Ye & Xingliang Dai, 2024. "Thermal management towards ultra-bright and stable perovskite nanocrystal-based pure red light-emitting diodes," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50634-0
    DOI: 10.1038/s41467-024-50634-0
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    References listed on IDEAS

    as
    1. Hoyeon Kim & Lianfeng Zhao & Jared S. Price & Alex J. Grede & Kwangdong Roh & Alyssa N. Brigeman & Mike Lopez & Barry P. Rand & Noel C. Giebink, 2018. "Hybrid perovskite light emitting diodes under intense electrical excitation," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    2. Yasser Hassan & Jong Hyun Park & Michael L. Crawford & Aditya Sadhanala & Jeongjae Lee & James C. Sadighian & Edoardo Mosconi & Ravichandran Shivanna & Eros Radicchi & Mingyu Jeong & Changduk Yang & H, 2021. "Ligand-engineered bandgap stability in mixed-halide perovskite LEDs," Nature, Nature, vol. 591(7848), pages 72-77, March.
    3. Wei Zou & Renzhi Li & Shuting Zhang & Yunlong Liu & Nana Wang & Yu Cao & Yanfeng Miao & Mengmeng Xu & Qiang Guo & Dawei Di & Li Zhang & Chang Yi & Feng Gao & Richard H. Friend & Jianpu Wang & Wei Huan, 2018. "Minimising efficiency roll-off in high-brightness perovskite light-emitting diodes," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
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