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Modulation of recombination zone position for quasi-two-dimensional blue perovskite light-emitting diodes with efficiency exceeding 5%

Author

Listed:
  • Zhenchao Li

    (South China University of Technology)

  • Ziming Chen

    (South China University of Technology)

  • Yongchao Yang

    (South China University of Technology)

  • Qifan Xue

    (South China University of Technology)

  • Hin-Lap Yip

    (South China University of Technology)

  • Yong Cao

    (South China University of Technology)

Abstract

In recent years, substantial progress has been made in developing perovskite light-emitting diodes with near-infrared, red and green emissions and over 20% external quantum efficiency. However, the development of perovskite light-emitting diodes with blue emission remains a great challenge, which retards further development of full-color displays and white-light illumination based on perovskite emissive materials. Here, firstly, through composition and dimensional engineering, we prepare quasi-two-dimensional perovskite thin films with improved blue emission, taking advantages of reduced trap density and enhanced photoluminescence quantum yield. Secondly, we find a vertically non-uniform distribution of perovskite crystals in the PEDOT:PSS/perovskite hybrid film. Through modulating the position of the recombination zone, we activate the majority of quasi-two-dimensional perovskite crystals, and thus demonstrate the most efficient blue perovskite light-emitting diode to date with emission peak at 480 nm, record luminance of 3780 cd m−2 and record external quantum efficiency of 5.7%.

Suggested Citation

  • Zhenchao Li & Ziming Chen & Yongchao Yang & Qifan Xue & Hin-Lap Yip & Yong Cao, 2019. "Modulation of recombination zone position for quasi-two-dimensional blue perovskite light-emitting diodes with efficiency exceeding 5%," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09011-5
    DOI: 10.1038/s41467-019-09011-5
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    Cited by:

    1. Zhenchao Li & Ziming Chen & Zhangsheng Shi & Guangruixing Zou & Linghao Chu & Xian-Kai Chen & Chujun Zhang & Shu Kong So & Hin-Lap Yip, 2023. "Charge injection engineering at organic/inorganic heterointerfaces for high-efficiency and fast-response perovskite light-emitting diodes," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    2. 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.
    3. Yang Bryan Cao & Daquan Zhang & Qianpeng Zhang & Xiao Qiu & Yu Zhou & Swapnadeep Poddar & Yu Fu & Yudong Zhu & Jin-Feng Liao & Lei Shu & Beitao Ren & Yucheng Ding & Bing Han & Zhubing He & Dai-Bin Kua, 2023. "High-efficiency, flexible and large-area red/green/blue all-inorganic metal halide perovskite quantum wires-based light-emitting diodes," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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