Effects of Co Doping on the Thermoelectric Properties of Cu3SbSe4 at Moderate Temperature
| Autor: | Lin Bo, Yong Peng Wang, Min Zuo, Wen Ying Wang, Lin Wang, Degang Zhao |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Condensed matter physics Mechanical Engineering Doping 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Moderate temperature 0104 chemical sciences Mechanics of Materials Thermoelectric effect General Materials Science 0210 nano-technology |
| Zdroj: | Materials Science Forum. 993:899-905 |
| ISSN: | 1662-9752 |
| Popis: | Cu3SbSe4-based thermoelectric materials are a class of thermoelectric materials with diamond-like structure which exhibit high thermoelectric properties at moderate temperature region and have broad research prospects. In this study, the p-type Co-doped Cu3-xCoxSbSe4 (x=0-0.015) thermoelectric materials were fabricated by melting-annealing-ball milling-hot pressing process to investigate the effects of Co doping on the thermoelectric properties of Cu3SbSe4. It is found that the average power factor of Cu2.995Co0.005SbSe4 was increased by 30% compared with the pure sample, indicating that Co doping had a great effect on the electrical properties of Cu3SbSe4. The energy gap of ternary p-type semiconductor Cu3SbSe4 was around 0.27eV. As the Co content increasing, the lattice distortion enhanced the phonon scattering, which led to the decrease in lattice thermal conductivity. The maximum thermoelectric figure of merit, ZTmax, reached 0.46 at 600K for the Cu2.995Co0.005SbSe4. |
| Databáze: | OpenAIRE |
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