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Published March 2012 | public
Journal Article

Improved Thermoelectric Properties in Lu-doped Yb_(14)MnSb_(11) Zintl Compounds


The thermoelectric transport properties of Lu-doped Yb_(14)MnSb_(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 Lu-doped samples was improved by ∼30% at 670 K, compared with that without doping.

Additional Information

© 2012 The Japan Society of Applied Physics. Received January 12, 2012; accepted January 27, 2012; published online February 14, 2012. The work is supported by NSFCs (51171171, 50971115, and 51101139), the National ''973'' Program (2007CB607502), and Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University.

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