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Rare earth element Pr enables high thermoelectric performance of Cu12Sb4S13

Author

Listed:
  • Chen Zhu

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

  • Feng Hu

    (Xuzhou University of Technology)

  • Lei Jiang

    (Xuzhou University of Technology)

  • Shouxi Jiang

    (Xuzhou University of Technology)

  • Kun Ding

    (Xuzhou University of Technology)

  • Jian Shao

    (Xuzhou University of Technology)

  • Manman Ding

    (Xuzhou University of Technology)

  • Fali Chong

    (Xuzhou University of Technology)

Abstract

Cu12Sb4S13 has received great attention due to its remarkable thermoelectric properties among medium-temperature range. Herein, the effect of rare earth element Pr substitution at Cu site of Cu12Sb4S13 is comprehensively investigated. Heavy rare earth element Pr substitution can induce strong mass fluctuation and strain-field fluctuation, resulting in intense phonon scattering and decreased lattice thermal conductivity. Consequently, a low lattice thermal conductivity κL of 0.42 W m−1 K−1 is obtained at 748 K in Cu11.7Pr0.3Sb4S13 sample. Additionally, the substitution of Pr for Cu can function as donors, tuning the hole concentration and optimizing the thermopower over the entire temperature range, with a maximum thermopower of 165 μV K−1 at 748 K. Correspondingly, a peak ZT of~0.9 is obtained at 748 K in Cu11.7Pr0.3Sb4S13 sample, due to the significantly reduced thermal conductivity and slightly enhanced power factor. Graphical abstract Perspective of Cu12Sb4S13 crystal structure and the temperature-dependent ZT for Cu12-xPrxSb4S13 samples

Suggested Citation

  • Chen Zhu & Feng Hu & Lei Jiang & Shouxi Jiang & Kun Ding & Jian Shao & Manman Ding & Fali Chong, 2024. "Rare earth element Pr enables high thermoelectric performance of Cu12Sb4S13," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 97(6), pages 1-8, June.
    • Handle: RePEc:spr:eurphb:v:97:y:2024:i:6:d:10.1140_epjb_s10051-024-00716-1
    DOI: 10.1140/epjb/s10051-024-00716-1
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