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  Thermoelectric properties of the Zintl phases Yb5M2Sb6 (M = Al, Ga, In)

Aydemir, U., Zevalkink, A., Ormeci, A., Wang, H., Ohno, S., Bux, S., et al. (2015). Thermoelectric properties of the Zintl phases Yb5M2Sb6 (M = Al, Ga, In). Dalton Transactions, 44(15), 6767-6774. doi:10.1039/c4dt03773a.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0026-C9A7-E Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-B1AB-6
Genre: Journal Article

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 Creators:
Aydemir, Umut1, Author
Zevalkink, Alex1, Author
Ormeci, Alim2, Author              
Wang, Heng1, Author
Ohno, Saneyuki1, Author
Bux, Sabah1, Author
Snyder, G. Jeffrey1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405              

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 Abstract: Zintl compounds with chemical formula Yb5M2Sb6 (M = Al, Ga, and In) form one of two known A(5)M(2)Pn(6) structure types characterized by double chains of corner-linked MPn(4) tetrahedra bridged by Pn(2) dumb-bells. High temperature electronic and thermal transport measurements were used to characterize the thermoelectric properties of Yb5M2Sb6 compounds. All samples were found to exhibit similar high p-type carrier concentrations, low resistivity and low Seebeck coefficients in agreement with the band structure calculations. These results, combined with previous studies, suggest that Yb5M2Sb6 compounds are semi-metals (i.e., they lack an energy gap between the valence and conduction bands), in contrast to the semi-conducting alkaline earth (Ca, Sr, Ba) and Eu based A(5)M(2)Sb(6) compounds. Yb5M2Sb6 compounds have very low lattice thermal conductivity, comparable to other closely related A(5)M(2)Sb(6) and A(3)MSb(3) phases. However, due to the semimetallic behaviour, the figure of merit of investigated samples remains low (zT < 0.15).

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Language(s): eng - English
 Dates: 2015-02-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000352271900012
DOI: 10.1039/c4dt03773a
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Title: Dalton Transactions
  Other : Dalton Trans.
Source Genre: Journal
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Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 44 (15) Sequence Number: - Start / End Page: 6767 - 6774 Identifier: ISSN: 1477-9226
CoNE: /journals/resource/954925269323