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Organic covalent modification to improve thermoelectric properties of TaS2

Author

Listed:
  • Shaozhi Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Xiao Yang

    (University of Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Lingxiang Hou

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Xueping Cui

    (Chinese Academy of Sciences)

  • Xinghua Zheng

    (University of Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Jian Zheng

    (Chinese Academy of Sciences)

Abstract

Organic semiconductors are attracting considerable attention as a new thermoelectric material because of their molecular diversity, non-toxicity and easy processing. The side chains which are introduced into two-dimensional (2D) transition metal dichalcogenides (TMDs) by covalent modification lead to a significant decrease in their thermal conductivity. Here, we describe a simple approach to preparing the side chains covalent modification TaS2 (SCCM-TaS2) organic/inorganic hybrid structures, which is a homogeneous and non-destructive technique that does not depend on defects and boundaries. Electrical conductivity of 3,401 S cm−1 and a power factor of 0.34 mW m−1 K−2 are obtained for a hybrid material of SCCM-TaS2, with an in-plane thermal conductivity of 4.0 W m−1 K−1, which is 7 times smaller than the thermal conductivity of the pristine TaS2 crystal. The power factor and low thermal conductivity contribute to a thermoelectric figure of merit (ZT) of ~0.04 at 443 K.

Suggested Citation

  • Shaozhi Wang & Xiao Yang & Lingxiang Hou & Xueping Cui & Xinghua Zheng & Jian Zheng, 2022. "Organic covalent modification to improve thermoelectric properties of TaS2," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-32058-w
    DOI: 10.1038/s41467-022-32058-w
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    References listed on IDEAS

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    1. Xueping Cui & Zhizhi Kong & Enlai Gao & Dazhen Huang & Yang Hao & Hongguang Shen & Chong-an Di & Zhiping Xu & Jian Zheng & Daoben Zhu, 2018. "Rolling up transition metal dichalcogenide nanoscrolls via one drop of ethanol," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    2. Chen Wang & Qiyuan He & Udayabagya Halim & Yuanyue Liu & Enbo Zhu & Zhaoyang Lin & Hai Xiao & Xidong Duan & Ziying Feng & Rui Cheng & Nathan O. Weiss & Guojun Ye & Yun-Chiao Huang & Hao Wu & Hung-Chie, 2018. "Monolayer atomic crystal molecular superlattices," Nature, Nature, vol. 555(7695), pages 231-236, March.
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