4.5 Article

Thermoelectric Properties of an Individual Suspended Single-Crystalline Sb2Se3 Nanowire

期刊

JOURNAL OF THERMAL SCIENCE
卷 31, 期 4, 页码 1106-1114

出版社

SPRINGER
DOI: 10.1007/s11630-022-1610-0

关键词

Sb2Se3 nanowire; thermoelectric properties; thermal conductivity; Seebeck coefficient; electrical conductivity

资金

  1. National Key Research and Development Program of China [2020YFA0715000]
  2. National Natural Science Foundation of China (NSFC) [52127816, 52176078]

向作者/读者索取更多资源

Nanowires show excellent thermoelectric performance due to their unique physical properties. In this paper, the thermoelectric properties of suspended Sb2Se3 nanowire were characterized using the T-type method, revealing high thermal and electrical conductivity, as well as low Seebeck coefficient and figure of merit.
Nanowires exhibit excellent thermoelectric performance, due to the stronger quantum confinement and phonon scattering effect compared to bulk materials. However, it is a challenge to accurately evaluate the thermoelectric performance of nanowires. In this paper, the thermoelectric properties of an individual suspended Sb2Se3 nanowire have been characterized by comprehensive T-type method, including thermal conductivity, electrical conductivity, Seebeck coefficient and figure of merit. The thermal conductivity increases from 0.57 W/(m center dot K) to 3.69 W/(m center dot K) with temperature increasing from 80 K to 320 K. The lattice vibration dominates the heat conduction process, and due to its flawless crystal structure, the thermal conductivity is not lower than the reported values of bulk Sb2Se3. The electrical conductivity increases from 7.83 S/m to 688 S/m in the temperature range of 50 K-320 K, which is a great improvement compared with the corresponding bulk value. At 294 K, the Seebeck coefficient of the Sb2Se3 nanowire is -1120 mu V/K and the corresponding figure of merit is 0.064.

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