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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.1
- 수록면
- 164 - 171 (8page)
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Tetrahedrite Cu12Sb4S13is composed of abundant non-toxic components and has attracted attention as a promising thermoelectricmaterial with low thermal conductivity at intermediate temperatures. The carrier concentration can be optimizedby doping (substituting), thereby maximizing its power factor and reducing its thermal conductivity. In this study,Cu12Sb4S13−zSez (z = 0.1–0.4) compounds were synthesized using mechanical alloying and hot pressing. Our objective wasto maintain a high power factor through Se doping and to reduce the lattice thermal conductivity through additional phononscattering. X-ray diffraction analysis revealed that the lattice constant increased with an increase in Se substitution for theS sites, and all the specimens appeared as a single tetrahedrite phase. As the Se doping level increased, the carrier (hole)concentration decreased while the mobility increased. The Hall and Seebeck coefficients were both positive, indicating thatSe-doped tetrahedrites exhibit p-type conduction. As the Se substitution increased, the electrical conductivity decreased,but the Seebeck coefficient increased. In addition, Se doping lowered both, the electronic and lattice thermal conductivities,which resulted in decreased thermal conductivity. A maximum dimensionless figure of merit (ZT) of 0.87 was obtained at723 K for Cu12Sb4S12.8Se0.2with a high power factor of 0.96 mW m−1 K−2 and a low thermal conductivity of 0.77 W m−1 K−1.
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참고문헌 (23)
참고문헌 신청
Dianta Ginting / 2019 / Thermoelectric Properties and Chemical Potential Tuning by K- and Se-Coalloying in (Pb0.5Sn0.5)1-xKxTe0.95Se0.05 / Electronic Materials Letters 15(3):342~349
Lu, X. / 2013 / Natural mineral tetrahedrite as a direct source of thermoelectric materials / Phys. Chem. Chem. Phys 15:5762~5766
Lu, X. / 2013 / High performance thermoelectricity in earth-abundant compounds based on natural mineral tetrahedrites / Adv. Energy Mater 3:342~348
Pfi tzner, A. / 1997 / Cu 12 Sb 4 S 13 : A temperature-dependent structure investigation / Acta Crystallogr 53:337~345
Bouyrie, Y. / 2015 / From crystal to glass-like thermal conductivity in crystalline minerals / Phys. Chem. Chem. Phys 17:19751~19758
Lu, X. / 2013 / Natural mineral tetrahedrite as a direct source of thermoelectric materials / Phys. Chem. Chem. Phys 15:5762~5766
Lu, X. / 2013 / High performance thermoelectricity in earth-abundant compounds based on natural mineral tetrahedrites / Adv. Energy Mater 3:342~348
Pfi tzner, A. / 1997 / Cu 12 Sb 4 S 13 : A temperature-dependent structure investigation / Acta Crystallogr 53:337~345
Bouyrie, Y. / 2015 / From crystal to glass-like thermal conductivity in crystalline minerals / Phys. Chem. Chem. Phys 17:19751~19758
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