Surface Modification of Bismuth by ALD of Antimony Oxide for Suppressing Lattice Thermal Conductivity

He S, Yang J, Bahrami A, Zhang X, He R, Hantusch M, Lehmann S, Nielsch K (2022)

Publication Type: Journal article

Publication year: 2022

Journal

ACS Applied Energy Materials American Chemical Society

Book Volume: 5

Pages Range: 4041-4046

Journal Issue: 4

DOI: 10.1021/acsaem.2c00681

Abstract

Surface modification may significantly improve the performance of thermoelectric materials by suppressing thermal conductivity. Using the powder atomic layer deposition method, the newly developed Sb2O5 thin films produced from SbCl5 and H2O2 were formed on the surfaces of Bi powders. Because of the high thermal resistance generated by Sb2O5 layers on Bi particles, a substantial decrease in κtot from 7.8 to 5.7 W m-1 K-1 was obtained with just 5 cycles of Sb2O5 layer deposition and a 16% reduction in κlat. Because of the strong phonon scattering, the maximum zT values increased by around 12% and were relocated to 423 K.

Involved external institutions

Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE) Zhengzhou University / 郑州大学 CN China (CN)

How to cite

APA:

He, S., Yang, J., Bahrami, A., Zhang, X., He, R., Hantusch, M.,... Nielsch, K. (2022). Surface Modification of Bismuth by ALD of Antimony Oxide for Suppressing Lattice Thermal Conductivity. ACS Applied Energy Materials, 5(4), 4041-4046. https://doi.org/10.1021/acsaem.2c00681

MLA:

He, Shiyang, et al. "Surface Modification of Bismuth by ALD of Antimony Oxide for Suppressing Lattice Thermal Conductivity." ACS Applied Energy Materials 5.4 (2022): 4041-4046.

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