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Solid-State Synthesis and Thermoelectric Properties of Ge-Doped Tetrahedrites Cu<sub>12</sub>Sb<sub>4-y</sub>Ge<sub>y</sub>S<sub>13</sub>
Se-In Jeong, Il-Ho Kim
Korean J. Met. Mater. 2022;60(5):376-383.   Published online 2022 Apr 22
DOI: https://doi.org/10.3365/KJMM.2022.60.5.376

Ge-doped tetrahedrites Cu12Sb4-yGeyS13 (y = 0.1–0.4) were prepared using mechanical alloying and hot pressing. An X-ray diffraction analysis after mechanical alloying showed a single tetrahedrite phase without secondary phases. The tetrahedrite phase was stable after hot pressing at 723 K under 70 MPa. As the Ge content increased, the lattice..... More

Electronic Transport and Thermoelectric Properties of Te-Doped Tetrahedrites Cu<sub>12</sub>Sb<sub>4-y</sub>Te<sub>y</sub>S<sub>13</sub>
Sung-Gyu Kwak, Go-Eun Lee, Il-Ho Kim
Korean J. Met. Mater. 2021;59(8):560-566.   Published online 2021 Jul 5
DOI: https://doi.org/10.3365/KJMM.2021.59.8.560

Tetrahedrite is a promising thermoelectric material mainly due to its low thermal conductivity, a consequence of its complicated crystal structure. However, tetrahedrite has a high hole concentration; therefore, optimizing carrier concentration through doping is required to maximize the power factor. In this study, Te-doped tetrahedrites Cu12Sb4-yTeyS13 (0.1 ≤ y ≤..... More

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