Dramatic thermal conductivity reduction by nanostructures for large increase in thermoelectric figure-of-merit of FeSb[subscript 2]
Author(s)
Chen, Gang; Zhao, Huaizhou; Pokharel, Mani; Zhu, Gaohua; Chen, Shuo; Lukas, Kevin; Jie, Qing; Opeil, Cyril; Ren, Zhifeng; ... Show more Show less
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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.
Date issued
2011-10Department
Massachusetts Institute of Technology. Department of Mechanical EngineeringJournal
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
ISSN
0003-6951
1077-3118