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Synthesis-on-substrate of quantum dot solids

Author

Listed:
  • Yuanzhi Jiang

    (Nankai University
    Haihe Laboratory of Sustainable Chemical Transformations)

  • Changjiu Sun

    (Nankai University)

  • Jian Xu

    (University of Toronto)

  • Saisai Li

    (Nankai University)

  • Minghuan Cui

    (Henan Normal University)

  • Xinliang Fu

    (Nankai University)

  • Yuan Liu

    (University of Toronto)

  • Yaqi Liu

    (Nankai University)

  • Haoyue Wan

    (University of Toronto)

  • Keyu Wei

    (Nankai University)

  • Tong Zhou

    (Nankai University)

  • Wei Zhang

    (Nankai University
    Haihe Laboratory of Sustainable Chemical Transformations)

  • Yingguo Yang

    (Chinese Academy of Sciences
    Fudan University)

  • Jien Yang

    (Henan Normal University)

  • Chaochao Qin

    (Henan Normal University)

  • Shuyan Gao

    (Henan Normal University)

  • Jun Pan

    (Zhejiang University of Technology)

  • Yufang Liu

    (Henan Normal University)

  • Sjoerd Hoogland

    (University of Toronto)

  • Edward H. Sargent

    (University of Toronto)

  • Jun Chen

    (Nankai University
    Haihe Laboratory of Sustainable Chemical Transformations)

  • Mingjian Yuan

    (Nankai University
    Haihe Laboratory of Sustainable Chemical Transformations)

Abstract

Perovskite light-emitting diodes (PeLEDs) with an external quantum efficiency exceeding 20% have been achieved in both green and red wavelengths1–5; however, the performance of blue-emitting PeLEDs lags behind6,7. Ultrasmall CsPbBr3 quantum dots are promising candidates with which to realize efficient and stable blue PeLEDs, although it has proven challenging to synthesize a monodispersed population of ultrasmall CsPbBr3 quantum dots, and difficult to retain their solution-phase properties when casting into solid films8. Here we report the direct synthesis-on-substrate of films of suitably coupled, monodispersed, ultrasmall perovskite QDs. We develop ligand structures that enable control over the quantum dots’ size, monodispersity and coupling during film-based synthesis. A head group (the side with higher electrostatic potential) on the ligand provides steric hindrance that suppresses the formation of layered perovskites. The tail (the side with lower electrostatic potential) is modified using halide substitution to increase the surface binding affinity, constraining resulting grains to sizes within the quantum confinement regime. The approach achieves high monodispersity (full-width at half-maximum = 23 nm with emission centred at 478 nm) united with strong coupling. We report as a result blue PeLEDs with an external quantum efficiency of 18% at 480 nm and 10% at 465 nm, to our knowledge the highest reported among perovskite blue LEDs by a factor of 1.5 and 2, respectively6,7.

Suggested Citation

  • Yuanzhi Jiang & Changjiu Sun & Jian Xu & Saisai Li & Minghuan Cui & Xinliang Fu & Yuan Liu & Yaqi Liu & Haoyue Wan & Keyu Wei & Tong Zhou & Wei Zhang & Yingguo Yang & Jien Yang & Chaochao Qin & Shuyan, 2022. "Synthesis-on-substrate of quantum dot solids," Nature, Nature, vol. 612(7941), pages 679-684, December.
  • Handle: RePEc:nat:nature:v:612:y:2022:i:7941:d:10.1038_s41586-022-05486-3
    DOI: 10.1038/s41586-022-05486-3
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    Citations

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    Cited by:

    1. Guangyi Shi & Zongming Huang & Ran Qiao & Wenjing Chen & Zhijian Li & Yaping Li & Kai Mu & Ting Si & Zhengguo Xiao, 2024. "Manipulating solvent fluidic dynamics for large-area perovskite film-formation and white light-emitting diodes," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Bin Xu & Yawen Li & Peibin Hong & Peijie Zhang & Jiang Han & Zewen Xiao & Zewei Quan, 2024. "Pressure-controlled free exciton and self-trapped exciton emission in quasi-one-dimensional hybrid lead bromides," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    3. 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.
    4. 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.
    5. Xiaopeng Feng & Chenglong Li & Jinmei Song & Yuhong He & Wei Qu & Weijun Li & Keke Guo & Lulu Liu & Bai Yang & Haotong Wei, 2024. "Differential perovskite hemispherical photodetector for intelligent imaging and location tracking," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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