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Stable and bright formamidinium-based perovskite light-emitting diodes with high energy conversion efficiency

Author

Listed:
  • Yanfeng Miao

    (Nanjing Tech University (NanjingTech))

  • You Ke

    (Nanjing Tech University (NanjingTech))

  • Nana Wang

    (Nanjing Tech University (NanjingTech))

  • Wei Zou

    (Nanjing Tech University (NanjingTech))

  • Mengmeng Xu

    (Nanjing Tech University (NanjingTech))

  • Yu Cao

    (Nanjing Tech University (NanjingTech))

  • Yan Sun

    (Nanjing Tech University (NanjingTech))

  • Rong Yang

    (Nanjing Tech University (NanjingTech))

  • Ying Wang

    (Nanjing Tech University (NanjingTech))

  • Yunfang Tong

    (Nanjing Tech University (NanjingTech))

  • Wenjie Xu

    (Nanjing Tech University (NanjingTech))

  • Liangdong Zhang

    (Nanjing Tech University (NanjingTech))

  • Renzhi Li

    (Nanjing Tech University (NanjingTech))

  • Jing Li

    (Zhejiang University)

  • Haiping He

    (Zhejiang University)

  • Yizheng Jin

    (Zhejiang University)

  • Feng Gao

    (Linköping University)

  • Wei Huang

    (Nanjing Tech University (NanjingTech)
    Nanjing University of Posts & Telecommunications
    Northwestern Polytechnical University (NPU))

  • Jianpu Wang

    (Nanjing Tech University (NanjingTech))

Abstract

Solution-processable perovskites show highly emissive and good charge transport, making them attractive for low-cost light-emitting diodes (LEDs) with high energy conversion efficiencies. Despite recent advances in device efficiency, the stability of perovskite LEDs is still a major obstacle. Here, we demonstrate stable and bright perovskite LEDs with high energy conversion efficiencies by optimizing formamidinium lead iodide films. Our LEDs show an energy conversion efficiency of 10.7%, and an external quantum efficiency of 14.2% without outcoupling enhancement through controlling the concentration of the precursor solutions. The device shows low efficiency droop, i.e. 8.3% energy conversion efficiency and 14.0% external quantum efficiency at a current density of 300 mA cm−2, making the device more efficient than state-of-the-art organic and quantum-dot LEDs at high current densities. Furthermore, the half-lifetime of device with benzylamine treatment is 23.7 hr under a current density of 100 mA cm−2, comparable to the lifetime of near-infrared organic LEDs.

Suggested Citation

  • Yanfeng Miao & You Ke & Nana Wang & Wei Zou & Mengmeng Xu & Yu Cao & Yan Sun & Rong Yang & Ying Wang & Yunfang Tong & Wenjie Xu & Liangdong Zhang & Renzhi Li & Jing Li & Haiping He & Yizheng Jin & Fen, 2019. "Stable and bright formamidinium-based perovskite light-emitting diodes with high energy conversion efficiency," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11567-1
    DOI: 10.1038/s41467-019-11567-1
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    Cited by:

    1. Yongjie Liu & Chen Tao & Yu Cao & Liangyan Chen & Shuxin Wang & Pei Li & Cheng Wang & Chenwei Liu & Feihong Ye & Shengyong Hu & Meng Xiao & Zheng Gao & Pengbing Gui & Fang Yao & Kailian Dong & Jiashua, 2022. "Synergistic passivation and stepped-dimensional perovskite analogs enable high-efficiency near-infrared light-emitting diodes," Nature Communications, Nature, vol. 13(1), pages 1-12, December.

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