Toberer, Eric S. and Brown, Shawna R. and Ikeda, Teruyuki and Kauzlarich, Susan M. and Snyder, G. Jeffrey (2008) High thermoelectric efficiency in lanthanum doped Yb14MnSb11. Applied Physics Letters, 93 (6). Art. No. 062110. ISSN 0003-6951. doi:10.1063/1.2970089. https://resolver.caltech.edu/CaltechAUTHORS:TOBapl08
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Abstract
Lanthanum doping of the high-temperature p-type thermoelectric material Yb_(14)MnSb_(11) enhances the figure of merit zT through carrier concentration tuning. This is achieved by substituting La^(3+) on the Yb^(2+) site to reduce the free hole concentration as expected from the change in valence. The high-temperature transport properties (Seebeck coefficient, electrical resistivity, Hall mobility, and thermal conductivity) of Yb_(13.6)La_(0.4)MnSb_(11) are explained by the change in carrier concentration using a simple rigid parabolic band model, similar to that found in Yb_(14)Mn_(1−x)A_(lx)Sb_(11). Together, use of these two dopant sites enables the partial decoupling of electronic and structural properties in Yb_(14)MnSb_(11)-based materials.
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| Additional Information: | ©2008 American Institute of Physics. Received 23 June 2008; accepted 24 July 2008; published 15 August 2008. We thank NASA/JPL, the Beckman Foundation, and NSF (Contract No. DMR-0600742) for funding and B.C. Sales for useful discussions. | |||||||||
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| Subject Keywords: | antimony alloys, crystal structure, doping, electrical resistivity, Hall mobility, high-temperature effects, hole density, lanthanum alloys, manganese alloys, Seebeck effect, thermal conductivity, ytterbium alloys | |||||||||
| Issue or Number: | 6 | |||||||||
| DOI: | 10.1063/1.2970089 | |||||||||
| Record Number: | CaltechAUTHORS:TOBapl08 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:TOBapl08 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 11503 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Archive Administrator | |||||||||
| Deposited On: | 25 Aug 2008 23:01 | |||||||||
| Last Modified: | 08 Nov 2021 22:00 |
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