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Author Lim, Young Soo ♦ Park, Kwan-Ho ♦ Tak, Jang Yeul ♦ Lee, Soonil ♦ Seo, Won-Seon ♦ Park, Cheol-Hee ♦ Kim, Tae Hoon ♦ Park, PumSuk ♦ Kim, Il-Ho ♦ Yang, Jihui
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ ABUNDANCE ♦ ANTIMONY ♦ CHARGE TRANSPORT ♦ COMPARATIVE EVALUATIONS ♦ CONCENTRATION RATIO ♦ CRYSTALS ♦ DEGREES OF FREEDOM ♦ ELECTRIC CONDUCTIVITY ♦ ELECTRONS ♦ FILLERS ♦ GLASS ♦ HEAT RECOVERY ♦ HOST ♦ PHONONS ♦ POWER FACTOR ♦ THERMOELECTRIC MATERIALS ♦ TRANSPORT THEORY ♦ WASTE HEAT
Abstract Among many kinds of thermoelectric materials, CoSb{sub 3} has received exceptional attention for automotive waste heat recovery. Its cage structure provides an ideal framework for the realization of phonon-glass electron-crystal strategy, and there have been numerous reports on the enhanced thermoelectric performance through the independent control of the thermal and electrical conductivity by introducing fillers into its cage sites. Herein, we report colligative thermoelectric transport properties in n-type CoSb{sub 3} from the viewpoint of “guest electrons in a host lattice.” Both the Seebeck coefficient and the charge transport properties are fundamentally determined by the concentration of the guest electrons, which are mostly donated by the fillers, in the conduction band of the host CoSb{sub 3}. Comparing this observation to our previous results, colligative relations for both the Seebeck coefficient and the mobility were deduced as functions of the carrier concentration, and thermoelectric transport constants were defined to predict the power factor in filled CoSb{sub 3}. This discovery not only increases the degree of freedom for choosing a filler but also provides the predictability of power factor in designing and engineering the n-type filled CoSb{sub 3} materials.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-03-21
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 119
Issue Number 11


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