Thermoelectric properties of Zn 5Sb 4In 2-δ (δ=0.15)

Y. Wu; A. P. Litvinchuk; E. S. Toberer; G. J. Snyder; Nathan Newman; A. Fischer; E. W. Scheidt; W. Scherer; U. Hussermann

doi:10.1063/1.4729566

Thermoelectric properties of Zn ₅Sb ₄In _2-δ (δ=0.15)

Y. Wu, A. P. Litvinchuk, E. S. Toberer, G. J. Snyder, Nathan Newman, A. Fischer, E. W. Scheidt, W. Scherer, U. Hussermann

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Abstract

The polymorphic intermetallic compound Zn ₅Sb ₄In _2-δ (δ= 0.15(3)) shows promising thermoelectric properties at low temperatures, approaching a figure of merit ZT of 0.3 at 300 K. However, thermopower and electrical resistivity changes discontinuously at around 220 K. Measurement of the specific heat locates the previously unknown temperature of the order-disorder phase transition at around 180 K. Investigation of the charge carrier concentration and mobility by Hall measurements and infrared reflection spectroscopy indicate a mixed conduction behavior and the activation of charge carriers at temperatures above 220 K. Zn ₅Sb ₄In _2-δ has a low thermal stability, and at temperatures above 470 K samples decompose into a mixture of Zn, InSb, and Zn ₄Sb ₃.

Original language	English (US)
Article number	123712
Journal	Journal of Applied Physics
Volume	111
Issue number	12
DOIs	https://doi.org/10.1063/1.4729566
State	Published - Jun 15 2012

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Thermoelectric properties of Zn 5Sb 4In 2-δ (δ=0.15)",

abstract = "The polymorphic intermetallic compound Zn 5Sb 4In 2-δ (δ= 0.15(3)) shows promising thermoelectric properties at low temperatures, approaching a figure of merit ZT of 0.3 at 300 K. However, thermopower and electrical resistivity changes discontinuously at around 220 K. Measurement of the specific heat locates the previously unknown temperature of the order-disorder phase transition at around 180 K. Investigation of the charge carrier concentration and mobility by Hall measurements and infrared reflection spectroscopy indicate a mixed conduction behavior and the activation of charge carriers at temperatures above 220 K. Zn 5Sb 4In 2-δ has a low thermal stability, and at temperatures above 470 K samples decompose into a mixture of Zn, InSb, and Zn 4Sb 3.",

author = "Y. Wu and Litvinchuk, {A. P.} and Toberer, {E. S.} and Snyder, {G. J.} and Nathan Newman and A. Fischer and Scheidt, {E. W.} and W. Scherer and U. Hussermann",

note = "Funding Information: This work was supported by the National Science Foundation through grant DMR-1007557.",

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doi = "10.1063/1.4729566",

language = "English (US)",

volume = "111",

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TY - JOUR

T1 - Thermoelectric properties of Zn 5Sb 4In 2-δ (δ=0.15)

AU - Wu, Y.

AU - Litvinchuk, A. P.

AU - Toberer, E. S.

AU - Snyder, G. J.

AU - Newman, Nathan

AU - Fischer, A.

AU - Scheidt, E. W.

AU - Scherer, W.

AU - Hussermann, U.

N1 - Funding Information: This work was supported by the National Science Foundation through grant DMR-1007557.

PY - 2012/6/15

Y1 - 2012/6/15

N2 - The polymorphic intermetallic compound Zn 5Sb 4In 2-δ (δ= 0.15(3)) shows promising thermoelectric properties at low temperatures, approaching a figure of merit ZT of 0.3 at 300 K. However, thermopower and electrical resistivity changes discontinuously at around 220 K. Measurement of the specific heat locates the previously unknown temperature of the order-disorder phase transition at around 180 K. Investigation of the charge carrier concentration and mobility by Hall measurements and infrared reflection spectroscopy indicate a mixed conduction behavior and the activation of charge carriers at temperatures above 220 K. Zn 5Sb 4In 2-δ has a low thermal stability, and at temperatures above 470 K samples decompose into a mixture of Zn, InSb, and Zn 4Sb 3.

AB - The polymorphic intermetallic compound Zn 5Sb 4In 2-δ (δ= 0.15(3)) shows promising thermoelectric properties at low temperatures, approaching a figure of merit ZT of 0.3 at 300 K. However, thermopower and electrical resistivity changes discontinuously at around 220 K. Measurement of the specific heat locates the previously unknown temperature of the order-disorder phase transition at around 180 K. Investigation of the charge carrier concentration and mobility by Hall measurements and infrared reflection spectroscopy indicate a mixed conduction behavior and the activation of charge carriers at temperatures above 220 K. Zn 5Sb 4In 2-δ has a low thermal stability, and at temperatures above 470 K samples decompose into a mixture of Zn, InSb, and Zn 4Sb 3.

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ER -

Thermoelectric properties of Zn ₅Sb ₄In _2-δ (δ=0.15)

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