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Ultra-low power carbon nanotube/porphyrin synaptic arrays for persistent photoconductivity and neuromorphic computing

Author

Listed:
  • Jian Yao

    (University of Science and Technology of China
    Chinese Academy of Sciences)

  • Qinan Wang

    (Chinese Academy of Sciences
    Xi’an Jiaotong-Liverpool University)

  • Yong Zhang

    (Chinese Academy of Sciences)

  • Yu Teng

    (Chinese Academy of Sciences)

  • Jing Li

    (Chinese Academy of Sciences)

  • Pin Zhao

    (Chinese Academy of Sciences)

  • Chun Zhao

    (Xi’an Jiaotong-Liverpool University)

  • Ziyi Hu

    (Chinese Academy of Sciences)

  • Zongjie Shen

    (Chinese Academy of Sciences)

  • Liwei Liu

    (University of Science and Technology of China
    Chinese Academy of Sciences)

  • Dan Tian

    (Nanjing Forestry University)

  • Song Qiu

    (University of Science and Technology of China
    Chinese Academy of Sciences)

  • Zhongrui Wang

    (Pokfulam Road)

  • Lixing Kang

    (University of Science and Technology of China
    Chinese Academy of Sciences)

  • Qingwen Li

    (University of Science and Technology of China
    Chinese Academy of Sciences)

Abstract

Developing devices with a wide-temperature range persistent photoconductivity (PPC) and ultra-low power consumption remains a significant challenge for optical synaptic devices used in neuromorphic computing. By harnessing the PPC properties in materials, it can achieve optical storage and neuromorphic computing, surpassing the von Neuman architecture-based systems. However, previous research implemented PPC required additional gate voltages and low temperatures, which need additional energy consumption and PPC cannot be achieved across a wide temperature range. Here, we fabricated a simple heterojunctions using zinc(II)-meso-tetraphenyl porphyrin (ZnTPP) and single-walled carbon nanotubes (SWCNTs). By leveraging the strong binding energy at the heterojunction interface and the unique band structure, the heterojunction achieved PPC over an exceptionally wide temperature range (77 K-400 K). Remarkably, it demonstrated nonvolatile storage for up to 2×104 s, without additional gate voltage. The minimum energy consumption for each synaptic event is as low as 6.5 aJ. Furthermore, we successfully demonstrate the feasibility to manufacture a flexible wafer-scale array utilizing this heterojunction. We applied it to autonomous driving under extreme temperatures and achieved as a high impressive accuracy rate as 94.5%. This tunable and stable wide-temperature PPC capability holds promise for ultra-low-power neuromorphic computing.

Suggested Citation

  • Jian Yao & Qinan Wang & Yong Zhang & Yu Teng & Jing Li & Pin Zhao & Chun Zhao & Ziyi Hu & Zongjie Shen & Liwei Liu & Dan Tian & Song Qiu & Zhongrui Wang & Lixing Kang & Qingwen Li, 2024. "Ultra-low power carbon nanotube/porphyrin synaptic arrays for persistent photoconductivity and neuromorphic computing," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50490-y
    DOI: 10.1038/s41467-024-50490-y
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    References listed on IDEAS

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