Dramatic thermal conductivity reduction by nanostructures for large increase in thermoelectric figure-of-merit of FeSb[subscript 2]
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Chen_Dramatic thermal.pdf
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Author(s)
Chen, Gang
Zhao, Huaizhou
Pokharel, Mani
Zhu, Gaohua
Chen, Shuo
Lukas, Kevin
Jie, Qing
Opeil, Cyril
Ren, Zhifeng
Date Issued
October 2011
Journal
Applied Physics Letters
Publisher
American Institute of Physics (AIP)
Citation
Zhao, Huaizhou et al. “Dramatic Thermal Conductivity Reduction by Nanostructures for Large Increase in Thermoelectric Figure-of-merit of FeSb2.” Applied Physics Letters 99.16 (2011): 163101. © 2011 American Institute of Physics
Version
Final published version
Abstract
In this report, thermal conductivity reduction by more than three orders of magnitude over its single crystal counterpart for the strongly correlated system FeSb[subscript 2] through a nanostructure approach was presented, leading to a significant increase of thermoelectric figure-of-merit (ZT). For the samples processed with the optimal parameters, the thermal conductivity reached 0.34 Wm[superscript −1] K[superscript −1] at 50 K, leading to a ZT peak of about 0.013, compared to 0.005 for single crystal FeSb[subscript 2], an increase of about 160%. This work suggests that nanostructure method is effective and can be possibly extended to other strongly correlated low temperature thermoelectric materials, paving the way for future cryogenic temperature cooling applications.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.3651757
