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Minimising efficiency roll-off in high-brightness perovskite light-emitting diodes

Author

Listed:
  • Wei Zou

    (Nanjing Tech University (NanjingTech))

  • Renzhi Li

    (Nanjing Tech University (NanjingTech))

  • Shuting Zhang

    (Nanjing Tech University (NanjingTech))

  • Yunlong Liu

    (Nanjing Tech University (NanjingTech)
    Liaocheng University)

  • Nana Wang

    (Nanjing Tech University (NanjingTech))

  • Yu Cao

    (Nanjing Tech University (NanjingTech))

  • Yanfeng Miao

    (Nanjing Tech University (NanjingTech))

  • Mengmeng Xu

    (Nanjing Tech University (NanjingTech))

  • Qiang Guo

    (Nanjing Tech University (NanjingTech))

  • Dawei Di

    (Cambridge University)

  • Li Zhang

    (Nanjing Tech University (NanjingTech))

  • Chang Yi

    (Nanjing Tech University (NanjingTech))

  • Feng Gao

    (Linköping University)

  • Richard H. Friend

    (Cambridge University)

  • Jianpu Wang

    (Nanjing Tech University (NanjingTech))

  • Wei Huang

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

Abstract

Efficiency roll-off is a major issue for most types of light-emitting diodes (LEDs), and its origins remain controversial. Here we present investigations of the efficiency roll-off in perovskite LEDs based on two-dimensional layered perovskites. By simultaneously measuring electroluminescence and photoluminescence on a working device, supported by transient photoluminescence decay measurements, we conclude that the efficiency roll-off in perovskite LEDs is mainly due to luminescence quenching which is likely caused by non-radiative Auger recombination. This detrimental effect can be suppressed by increasing the width of quantum wells, which can be easily realized in the layered perovskites by tuning the ratio of large and small organic cations in the precursor solution. This approach leads to the realization of a perovskite LED with a record external quantum efficiency of 12.7%, and the efficiency remains to be high, at approximately 10%, under a high current density of 500 mA cm−2.

Suggested Citation

  • 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.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03049-7
    DOI: 10.1038/s41467-018-03049-7
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    Cited by:

    1. Jong Hyun Park & Chung Hyeon Jang & Eui Dae Jung & Seungjin Lee & Myoung Hoon Song & Bo Ram Lee, 2020. "A-Site Cation Engineering for Efficient Blue-Emissive Perovskite Light-Emitting Diodes," Energies, MDPI, vol. 13(24), pages 1-8, December.
    2. 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.

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