Role of chemically and thermally induced crystal lattice distortion in enhancing the Seebeck coefficient in complex tellurides [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2016.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy - Physical Description
- pages 6,632-6,639 : digital, PDF file
- Additional Creators
- Ames Laboratory, United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
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- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- Composition and crystal structure of complex materials can significantly change the Seebeck effect, i.e., heat to electrical energy conversion, which is utilized in thermoelectric materials. Despite decades of studies of various thermoelectric materials and their application, the fundamental understanding of this effect still is limited. One of the most efficient groups of thermoelectric materials is based on GeTe, where Ge is replaced by [Ag + Sb], i.e., AgxSbxGe50-2xTe50 alloys, traditionally shown as (GeTe)m(AgSbTe2)100-m (TAGS-m series). Here, in this article, we report on the discovery of two unique phenomena in TAGS materials attributed to the effects from [Ag + Sb] atoms: (i) a linear relation between the Seebeck coefficient and rhombohedral lattice distortion, and (ii) resonance-like temperature-induced behavior of the contribution to the Seebeck coefficient produced by [Ag + Sb] atoms. Finally, our findings show that heat to electrical energy conversion strongly depends on the temperature- and compositionally-induced rhombohedral to cubic transformation where [Ag + Sb] atoms play a crucial mediating role.
- Report Numbers
- E 1.99:is-j--9091
is-j--9091 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
07/14/2016.
"is-j--9091"
CrystEngComm 18 35 ISSN 1466-8033 AM
Levin, E. M. [Ames Lab., Ames, IA (United States). Division of Materials Sciences & Engineering; Iowa State Univ., Ames, IA (United States). Department of Physics and Astronomy]; Kramer, M. J. [Ames Lab., Ames, IA (United States). Division of Materials Sciences & Engineering; Iowa State Univ., Ames, IA (United States). Department of Materials Sciences and Engineering]. - Funding Information
- AC02-07CH11358
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