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Entropy engineering promotes thermoelectric performance in p-type chalcogenides

Author

Listed:
  • Binbin Jiang

    (Southern University of Science and Technology)

  • Yong Yu

    (Southern University of Science and Technology)

  • Hongyi Chen

    (Central South University)

  • Juan Cui

    (Southern University of Science and Technology)

  • Xixi Liu

    (Southern University of Science and Technology)

  • Lin Xie

    (Southern University of Science and Technology)

  • Jiaqing He

    (Southern University of Science and Technology
    Southern University of Science and Technology
    Southern University of Science and Technology, Ministry of Education)

Abstract

We demonstrate that the thermoelectric properties of p-type chalcogenides can be effectively improved by band convergence and hierarchical structure based on a high-entropy-stabilized matrix. The band convergence is due to the decreased light and heavy band energy offsets by alloying Cd for an enhanced Seebeck coefficient and electric transport property. Moreover, the hierarchical structure manipulated by entropy engineering introduces all-scale scattering sources for heat-carrying phonons resulting in a very low lattice thermal conductivity. Consequently, a peak zT of 2.0 at 900 K for p-type chalcogenides and a high experimental conversion efficiency of 12% at ΔT = 506 K for the fabricated segmented modules are achieved. This work provides an entropy strategy to form all-scale hierarchical structures employing high-entropy-stabilized matrix. This work will promote real applications of low-cost thermoelectric materials.

Suggested Citation

  • Binbin Jiang & Yong Yu & Hongyi Chen & Juan Cui & Xixi Liu & Lin Xie & Jiaqing He, 2021. "Entropy engineering promotes thermoelectric performance in p-type chalcogenides," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23569-z
    DOI: 10.1038/s41467-021-23569-z
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    Cited by:

    1. Decheng An & Senhao Zhang & Xin Zhai & Wutao Yang & Riga Wu & Huaide Zhang & Wenhao Fan & Wenxian Wang & Shaoping Chen & Oana Cojocaru-Mirédin & Xian-Ming Zhang & Matthias Wuttig & Yuan Yu, 2024. "Metavalently bonded tellurides: the essence of improved thermoelectric performance in elemental Te," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    2. Yingcai Zhu & Dongyang Wang & Tao Hong & Lei Hu & Toshiaki Ina & Shaoping Zhan & Bingchao Qin & Haonan Shi & Lizhong Su & Xiang Gao & Li-Dong Zhao, 2022. "Multiple valence bands convergence and strong phonon scattering lead to high thermoelectric performance in p-type PbSe," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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