Improved thermoelectric properties in LU-doped Yb 14mnsb 11Zintl compounds

Cui Yu; Yi Chen; Hanhui Xie; G. Jeffrey Snyder; Chenguang Fu; Jinshu Xu; Xinbing Zhao; Tiejun Zhu

doi:10.1143/APEX.5.031801

Improved thermoelectric properties in LU-doped Yb ₁₄mnsb ₁₁Zintl compounds

Cui Yu, Yi Chen, Hanhui Xie, G. Jeffrey Snyder, Chenguang Fu, Jinshu Xu, Xinbing Zhao, Tiejun Zhu^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

The thermoelectric transport properties of Lu-doped ₁₄MnSb ₁₁ Zintl compounds have been investigated. The electrical conductivity increased and the Seebeck coefficient decreased with increasing Lu doping content, due to an increased carrier concentration. The carrier mobility behavior was in good accordance with the single parabolic band model. It is suggested that Lu doping simply shifts the Fermi energy with the band structure minimally altered. The lattice thermal conductivity roughly decreased via Lu doping. The maximum dimensionless figure of merit ZT of the Ludoped samples was improved by ∼30% at 670 K, compared with that without doping.

Original language	English (US)
Article number	031801
Journal	Applied Physics Express
Volume	5
Issue number	3
DOIs	https://doi.org/10.1143/APEX.5.031801
State	Published - Mar 1 2012

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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abstract = "The thermoelectric transport properties of Lu-doped 14MnSb 11 Zintl compounds have been investigated. The electrical conductivity increased and the Seebeck coefficient decreased with increasing Lu doping content, due to an increased carrier concentration. The carrier mobility behavior was in good accordance with the single parabolic band model. It is suggested that Lu doping simply shifts the Fermi energy with the band structure minimally altered. The lattice thermal conductivity roughly decreased via Lu doping. The maximum dimensionless figure of merit ZT of the Ludoped samples was improved by ∼30% at 670 K, compared with that without doping.",

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AU - Yu, Cui

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AU - Xie, Hanhui

AU - Snyder, G. Jeffrey

AU - Fu, Chenguang

AU - Xu, Jinshu

AU - Zhao, Xinbing

AU - Zhu, Tiejun

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N2 - The thermoelectric transport properties of Lu-doped 14MnSb 11 Zintl compounds have been investigated. The electrical conductivity increased and the Seebeck coefficient decreased with increasing Lu doping content, due to an increased carrier concentration. The carrier mobility behavior was in good accordance with the single parabolic band model. It is suggested that Lu doping simply shifts the Fermi energy with the band structure minimally altered. The lattice thermal conductivity roughly decreased via Lu doping. The maximum dimensionless figure of merit ZT of the Ludoped samples was improved by ∼30% at 670 K, compared with that without doping.

AB - The thermoelectric transport properties of Lu-doped 14MnSb 11 Zintl compounds have been investigated. The electrical conductivity increased and the Seebeck coefficient decreased with increasing Lu doping content, due to an increased carrier concentration. The carrier mobility behavior was in good accordance with the single parabolic band model. It is suggested that Lu doping simply shifts the Fermi energy with the band structure minimally altered. The lattice thermal conductivity roughly decreased via Lu doping. The maximum dimensionless figure of merit ZT of the Ludoped samples was improved by ∼30% at 670 K, compared with that without doping.

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