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Large-area and efficient perovskite light-emitting diodes via low-temperature blade-coating

Author

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  • Shenglong Chu

    (University of Science and Technology of China)

  • Wenjing Chen

    (University of Science and Technology of China)

  • Zhibin Fang

    (University of Science and Technology of China)

  • Xun Xiao

    (University of North Carolina at Chapel Hill)

  • Yan Liu

    (University of Science and Technology of China)

  • Jia Chen

    (University of Science and Technology of China)

  • Jinsong Huang

    (University of North Carolina at Chapel Hill)

  • Zhengguo Xiao

    (University of Science and Technology of China)

Abstract

Large-area light-emitting diodes (LEDs) fabricated by mass-production techniques are needed for low-cost flat-panel lighting. Nevertheless, it is still challenging to fabricate efficient large-area LEDs using organic small molecules (OLEDs), quantum dots (QLEDs), polymers (PLEDs), and recently-developed hybrid perovskites (PeLEDs) due to difficulties controlling film uniformity. To that end, we report sol-gel engineering of low-temperature blade-coated methylammonium lead iodide (MAPbI3) perovskite films. The precipitation, gelation, aging, and phase transformation stages are dramatically shortened by using a diluted, organoammonium-excessed precursor, resulting in ultra-flat large-area films (54 cm2) with roughness reaching 1 nm. The external quantum efficiency of doctor-bladed PeLEDs reaches 16.1%, higher than that of best-performing blade-coated OLEDs, QLEDs, and PLEDs. Furthermore, benefitting from the throughput of the blade-coating process and cheap materials, the expected cost of the emissive layer is projected to be as low as 0.02 cents per cm2, emphasizing its application potential.

Suggested Citation

  • Shenglong Chu & Wenjing Chen & Zhibin Fang & Xun Xiao & Yan Liu & Jia Chen & Jinsong Huang & Zhengguo Xiao, 2021. "Large-area and efficient perovskite light-emitting diodes via low-temperature blade-coating," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20433-4
    DOI: 10.1038/s41467-020-20433-4
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    Cited by:

    1. Tian Tian & Meifang Yang & Yuxuan Fang & Shuo Zhang & Yuxin Chen & Lianzhou Wang & Wu-Qiang Wu, 2023. "Large-area waterproof and durable perovskite luminescent textiles," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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