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Edge stabilization in reduced-dimensional perovskites

Author

Listed:
  • Li Na Quan

    (University of Toronto)

  • Dongxin Ma

    (University of Toronto)

  • Yongbiao Zhao

    (University of Toronto
    University of Toronto)

  • Oleksandr Voznyy

    (University of Toronto)

  • Haifeng Yuan

    (University of Toronto
    KU Leuven)

  • Eva Bladt

    (University of Antwerp)

  • Jun Pan

    (King Abdullah University of Science and Technology (KAUST)
    Zhejiang University of Technology)

  • F. Pelayo García de Arquer

    (University of Toronto)

  • Randy Sabatini

    (University of Toronto)

  • Zachary Piontkowski

    (University of Rochester)

  • Abdul-Hamid Emwas

    (King Abdullah University of Science and Technology)

  • Petar Todorović

    (University of Toronto)

  • Rafael Quintero-Bermudez

    (University of Toronto)

  • Grant Walters

    (University of Toronto)

  • James Z. Fan

    (University of Toronto)

  • Mengxia Liu

    (University of Toronto)

  • Hairen Tan

    (University of Toronto)

  • Makhsud I. Saidaminov

    (University of Toronto)

  • Liang Gao

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

  • Yiying Li

    (University of Toronto)

  • Dalaver H. Anjum

    (King Abdullah University of Science and Technology)

  • Nini Wei

    (King Abdullah University of Science and Technology)

  • Jiang Tang

    (Huazhong University of Science and Technology (HUST))

  • David W. McCamant

    (University of Rochester)

  • Maarten B. J. Roeffaers

    (KU Leuven)

  • Sara Bals

    (University of Antwerp)

  • Johan Hofkens

    (KU Leuven
    Max Planck Institute for Polymer Research)

  • Osman M. Bakr

    (King Abdullah University of Science and Technology (KAUST))

  • Zheng-Hong Lu

    (University of Toronto)

  • Edward H. Sargent

    (University of Toronto)

Abstract

Reduced-dimensional perovskites are attractive light-emitting materials due to their efficient luminescence, color purity, tunable bandgap, and structural diversity. A major limitation in perovskite light-emitting diodes is their limited operational stability. Here we demonstrate that rapid photodegradation arises from edge-initiated photooxidation, wherein oxidative attack is powered by photogenerated and electrically-injected carriers that diffuse to the nanoplatelet edges and produce superoxide. We report an edge-stabilization strategy wherein phosphine oxides passivate unsaturated lead sites during perovskite crystallization. With this approach, we synthesize reduced-dimensional perovskites that exhibit 97 ± 3% photoluminescence quantum yields and stabilities that exceed 300 h upon continuous illumination in an air ambient. We achieve green-emitting devices with a peak external quantum efficiency (EQE) of 14% at 1000 cd m−2; their maximum luminance is 4.5 × 104 cd m−2 (corresponding to an EQE of 5%); and, at 4000 cd m−2, they achieve an operational half-lifetime of 3.5 h.

Suggested Citation

  • Li Na Quan & Dongxin Ma & Yongbiao Zhao & Oleksandr Voznyy & Haifeng Yuan & Eva Bladt & Jun Pan & F. Pelayo García de Arquer & Randy Sabatini & Zachary Piontkowski & Abdul-Hamid Emwas & Petar Todorovi, 2020. "Edge stabilization in reduced-dimensional perovskites," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-13944-2
    DOI: 10.1038/s41467-019-13944-2
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    Cited by:

    1. Sheprow, Elizabeth & Harrison, Spencer H., 2022. "When regular meets remarkable: Awe as a link between routine work and meaningful self-narratives," Organizational Behavior and Human Decision Processes, Elsevier, vol. 170(C).

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