Journal of Inorganic Materials, Volume. 38, Issue 11, 1331(2023)

Donor-like Effect and Thermoelectric Performance in p-Type Bi0.5Sb1.5Te3 Alloy

Zhiqiang LU1...2, Keke LIU1,2, Qiang LI1,2, Qin HU1,2, Liping FENG1,2, Qingjie ZHANG2, Jinsong WU2,3, Xianli SU1,2,*, and Xinfeng TANG12,* |Show fewer author(s)
Author Affiliations
  • 11. Longzhong Laboratory in Hubei Province, Xiangyang Demonstration Zone of Wuhan University of Technology, Xiangyang 441000, China
  • 22. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
  • 33. Nanostructure Research Center, Wuhan University of Technology, Wuhan 430070, China
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    Figures & Tables(7)
    (a) Powder XRD patterns of sintered samples with powders treated in different atmospheres, and (b) XRD patterns of bulk samples measured perpendicular to the sintered pressing direction
    FESEM images for In-Ar sample along the direction (a) perpendicular and (b) parallel to sintering pressure
    (a) Backscattered electron images, (b) Bi, (c) Sb, and (d) Te elemental distribution mappings on the polished surface of In-Ar sample via EDS along the direction perpendicular to the sintering pressure
    Formation energy with complex defects presented in Bi0.5Sb1.5Te3 alloys at different Te chemical potentials
    Temperature dependence of (a) electrical conductivity, (b) Seebeck coefficient, (c) power factor for samples treated with different atmospheres along the direction perpendicular to the sintering pressure, (d) relationship between Seebeck coefficient and carrier concentration (Pisarenko curve) at room temperature for Bi-Sb-Te alloy
    Temperature dependence of (a) total thermal conductivity, (b) sum of lattice thermal conductivity and bipolar thermal conductivity, (c) thermoelectric merit ZT for samples treated with different atmospheres along the direction perpendicular to the sintering pressure
    • Table 1. Orientation factor (F), conductivity (σ), Seebeck coefficient (S), carrier concentration (n), mobility (μ), total thermal conductivity(κ), effective mass (m*/m0), and thermoelectric value ZT of the samples treated with different atmospheres at room temperature and average thermoelectric value ZTave

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      Table 1. Orientation factor (F), conductivity (σ), Seebeck coefficient (S), carrier concentration (n), mobility (μ), total thermal conductivity(κ), effective mass (m*/m0), and thermoelectric value ZT of the samples treated with different atmospheres at room temperature and average thermoelectric value ZTave

      SampleFσ/(×104, S•m−1) S/(μV•K−1) n/(×1019, cm−3) μ/(cm2•V−1•s−1) κ/(W•m−1•K−1) m*/m0ZTZTave
      In-Ar0.07617.501504.492431.490.930.780.92
      Out-Ar0.07415.551603.882491.450.910.820.86
      In-Air0.07812.921723.312431.280.890.900.81
      Out-Air0.07212.361773.212401.230.890.940.87
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    Zhiqiang LU, Keke LIU, Qiang LI, Qin HU, Liping FENG, Qingjie ZHANG, Jinsong WU, Xianli SU, Xinfeng TANG. Donor-like Effect and Thermoelectric Performance in p-Type Bi0.5Sb1.5Te3 Alloy [J]. Journal of Inorganic Materials, 2023, 38(11): 1331

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    Paper Information

    Category:

    Received: Mar. 9, 2023

    Accepted: --

    Published Online: Mar. 6, 2024

    The Author Email: SU Xianli (suxianli@whut.edu.cn), TANG Xinfeng (tangxf@whut.edu.cn)

    DOI:10.15541/jim20230121

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