NDLI: Ioffe–Regel limit and lattice thermal conductivity reduction of high performance (AgSbTe2)15(GeTe)85 thermoelectric materials

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Back cover

Journal of Materials Chemistry A Vol - 2 Issue - 8

Journal of Materials Chemistry A Vol - 2 Issue - 7

Journal of Materials Chemistry A Vol - 2 Issue - 6

Journal of Materials Chemistry A Vol - 2 Issue - 5

Journal of Materials Chemistry A Vol -1

Ioffe–Regel limit and lattice thermal conductivity reduction of high performance (AgSbTe₂)₁₅(GeTe)₈₅ thermoelectric materials

Content Provider	Royal Society of Chemistry (RSC)
Author	Chen, Yi Zhu, Tiejun Gao, Hongli Zhao, Xinbing
Copyright Year	2014
Abstract	The transport characteristics of high performance (AgxSbTex/2+1.5)15(GeTe)85 (TAGS-85) (x = 0.4–1.2) thermoelectric alloys are investigated. It is found that the carrier mean free path of TAGS-85 materials is comparable to the lattice parameter, indicating that this system has reached the minimum possible mobility, the Ioffe–Regel limit, and that further reduction of grain size will not affect the mobility while benefiting to the thermal conductivity reduction. The fine-grained samples are prepared by melt spinning to corroborate the supposition. The carrier mobility and mean free path of melt spun samples are indeed comparable with those of coarse-grained samples, while the lattice thermal conductivity is suppressed effectively as a result of the increasing boundaries and hence phonon scattering. A state-of-the-art ZT of ∼1.6 is obtained for the melt-spun fine-grained samples and the temperature region of ZT > 1.2 has been broadened notably, which is pretty encouraging for the future applications.
Starting Page	3251
Ending Page	3256
Page Count	6
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	2
Issue Number	9
Journal	Journal of Materials Chemistry A
DOI	10.1039/c3ta15147f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Thermoelectric materials Lattice constant Thermal conductivity Melt spinning Phonon
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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Ioffe–Regel limit and lattice thermal conductivity reduction of high performance (AgSbTe2)15(GeTe)85 thermoelectric materials

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