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Color-stable highly luminescent sky-blue perovskite light-emitting diodes

Author

Listed:
  • Jun Xing

    (Nanyang Technological University
    University of Toronto
    Northwestern Polytechnical University (NPU))

  • Yongbiao Zhao

    (University of Toronto)

  • Mikhail Askerka

    (University of Toronto)

  • Li Na Quan

    (University of Toronto)

  • Xiwen Gong

    (University of Toronto)

  • Weijie Zhao

    (Nanyang Technological University)

  • Jiaxin Zhao

    (Nanyang Technological University)

  • Hairen Tan

    (University of Toronto)

  • Guankui Long

    (University of Toronto)

  • Liang Gao

    (University of Toronto
    Huazhong University of Science and Technology (HUST))

  • Zhenyu Yang

    (University of Toronto)

  • Oleksandr Voznyy

    (University of Toronto)

  • Jiang Tang

    (Huazhong University of Science and Technology (HUST))

  • Zheng-Hong Lu

    (University of Toronto)

  • Qihua Xiong

    (Nanyang Technological University
    Nanyang Technological University
    MajuLab, CNRS-UNS-NUS-NTU International Joint Research Unit, UMI-3654)

  • Edward H. Sargent

    (University of Toronto)

Abstract

Perovskite light-emitting diodes (PeLEDs) have shown excellent performance in the green and near-infrared spectral regions, with high color purity, efficiency, and brightness. In order to shift the emission wavelength to the blue, compositional engineering (anion mixing) and quantum-confinement engineering (reduced-dimensionality) have been employed. Unfortunately, LED emission profiles shift with increasing driving voltages due to either phase separation or the coexistence of multiple crystal domains. Here we report color-stable sky-blue PeLEDs achieved by enhancing the phase monodispersity of quasi-2D perovskite thin films. We selected cation combinations that modulate the crystallization and layer thickness distribution of the domains. The perovskite films show a record photoluminescence quantum yield of 88% at 477 nm. The corresponding PeLEDs exhibit stable sky-blue emission under high operation voltages. A maximum luminance of 2480 cd m−2 at 490 nm is achieved, fully one order of magnitude higher than the previous record for quasi-2D blue PeLEDs.

Suggested Citation

  • Jun Xing & Yongbiao Zhao & Mikhail Askerka & Li Na Quan & Xiwen Gong & Weijie Zhao & Jiaxin Zhao & Hairen Tan & Guankui Long & Liang Gao & Zhenyu Yang & Oleksandr Voznyy & Jiang Tang & Zheng-Hong Lu &, 2018. "Color-stable highly luminescent sky-blue perovskite light-emitting diodes," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-05909-8
    DOI: 10.1038/s41467-018-05909-8
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    Cited by:

    1. Kang Wang & Zih-Yu Lin & Zihan Zhang & Linrui Jin & Ke Ma & Aidan H. Coffey & Harindi R. Atapattu & Yao Gao & Jee Yung Park & Zitang Wei & Blake P. Finkenauer & Chenhui Zhu & Xiangeng Meng & Sarah N. , 2023. "Suppressing phase disproportionation in quasi-2D perovskite light-emitting diodes," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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