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- W4313379470 abstract "In this study, Cu<sub>3</sub>Sb<sub>1-y</sub>Sn<sub>y</sub>Se<sub>4</sub> (0 ≤ y ≤ 0.08) permingeatites were synthesized via mechanical alloying followed by hot pressing. The phase transformation, microstructure, charge transport parameters of the permingeatites, and their thermoelectric properties were analyzed. The permingeatites were present in a single phase with a tetragonal structure, and secondary phases were not detected. The permingeatites had relative densities of 97.2%–98.5%. The lattice constants of the a- and c-axis increased when Sn was substituted at the Sb sites. With increasing Sn content, the carrier concentration increased to (2.2–4.1) × 10<sup>19</sup> cm<sup>-3</sup>; however, mobility did not change significantly, at 58–66 cm<sup>2</sup>V<sup>-1</sup>s<sup>-1</sup>. The undoped Cu<sub>3</sub>SbSe<sub>4</sub> behaved as a non-degenerate semiconductor. Its Lorenz number was calculated to be (1.57–1.56) × 10<sup>-8</sup>V<sup>2</sup>K<sup>-2</sup> at 323–623 K, and a maximum dimensionless figure of merit (<i>ZT</i>) of 0.39 was obtained at the temperature of 623 K, power factor of 0.49 mWm<sup>-1</sup>K<sup>-2</sup>, and thermal conductivity of 0.76 Wm<sup>-1</sup>K<sup>-1</sup>. However, the Sn-doped specimens behaved as degenerate semiconductors. Their Lorenz numbers increased to (1.63–1.94) × 10<sup>-8</sup>V<sup>2</sup>K<sup>-2</sup> at 323–623 K. Cu<sub>3</sub>Sb<sub>0.96</sub>Sn<sub>0.04</sub>Se<sub>4</sub> exhibited a remarkably enhanced <i>ZT</i> of 0.71 at a temperature of 623 K, power factor of 1.18 mWm<sup>-1</sup>K<sup>-2</sup>, and thermal conductivity of 1.01 Wm<sup>-1</sup>K<sup>-1</sup>." @default.
- W4313379470 created "2023-01-06" @default.
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- W4313379470 date "2023-01-05" @default.
- W4313379470 modified "2023-09-25" @default.
- W4313379470 title "Enhanced Thermoelectric Performance of Sn-Doped Permingeatites Cu<sub>3</sub>Sb<sub>1-y</sub>Sn<sub>y</sub>Se<sub>4</sub>" @default.
- W4313379470 doi "https://doi.org/10.3365/kjmm.2023.61.1.52" @default.
- W4313379470 hasPublicationYear "2023" @default.
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