Jump to main content
Jump to site search


Exceptional Thermoelectric Performance of a “Star-Like” SnSe Nanotube with Ultra-Low Thermal Conductivity and a High Power Factor

Abstract

Efficient thermoelectric energy conversion is both crucial and challenging, and requires new materials candidates by design. From first princi-ples simulations, we identify that a “star-like” SnSe nanotube – with alternating dense and loose rings along the tube direction – gives rise to an ultra-low lattice thermal conductivity, 0.18 Wm-1K-1 at 750K, and a large Seebeck coefficient, compared with single crystal SnSe. The power factor of the p-type SnSe nanotube reaches its maximum value of 235 μWcm-1K-2 at a moderate doping level around 1020 to 1021 cm-3. The p-type nanotube shows better thermoelectric properties than the n-type. The phonon anharmonic scattering rate of the SnSe nanotube is larger than that of the SnSe crystal. All of these lead to an exceptional figure-of-merit (ZT) value of 3.5~4.6, compared to 0.6~2.6 for crystalline SnSe at the optimal condition. Such a large ZT value should lead to a six fold increase in the energy conversion efficiency to about 30%.

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Jul 2017, accepted on 11 Aug 2017 and first published on 11 Aug 2017


Article type: Paper
DOI: 10.1039/C7CP04508E
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
  •   Request permissions

    Exceptional Thermoelectric Performance of a “Star-Like” SnSe Nanotube with Ultra-Low Thermal Conductivity and a High Power Factor

    C. Lin, W. Cheng, Z. X. Guo, G. Chai and H. Zhang, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP04508E

Search articles by author

Spotlight

Advertisements