Effect of cationic substitution on the thermoelectric properties of In 4-xMxSe2.95 compounds (M Na, Ca, Zn, Ga, Sn, Pb; X 0.1)

Kyunghan Ahn; Eunseog Cho; Jong Soo Rhyee; Sang Il Kim; Sang Mock Lee; Kyu Hyoung Lee

doi:10.1063/1.3637053

Effect of cationic substitution on the thermoelectric properties of In _4-xM_xSe_2.95 compounds (M Na, Ca, Zn, Ga, Sn, Pb; X 0.1)

Kyunghan Ahn, Eunseog Cho, Jong Soo Rhyee, Sang Il Kim, Sang Mock Lee, Kyu Hyoung Lee

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

We report an electrical and thermal transport study for polycrystalline samples of In₄Se_3-x substituted with various metals. Our experimental and theoretical investigation revealed that the Na, Ca, and Pb substitutions at the In4 site in the 4:3 indium selenide lattice are more effective for increase in electron concentration than the Zn, Ga, and Sn substitutions at other sites, and the Peierls distortion in cationic substituted compounds may not be as strong as In₄Se_3-x based on higher lattice thermal conductivities of the former than the latter. It is found that the cationic substitutions may weaken the effect of Peierls distortion on thermal properties for In₄Se_3-x while they maintain the same trend for electrical properties of In₄Se_3-x with different electron concentrations.

Original language	English
Article number	102110
Journal	Applied Physics Letters
Volume	99
Issue number	10
DOIs	https://doi.org/10.1063/1.3637053
Publication status	Published - 2011 Sept 5

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3637053

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abstract = "We report an electrical and thermal transport study for polycrystalline samples of In4Se3-x substituted with various metals. Our experimental and theoretical investigation revealed that the Na, Ca, and Pb substitutions at the In4 site in the 4:3 indium selenide lattice are more effective for increase in electron concentration than the Zn, Ga, and Sn substitutions at other sites, and the Peierls distortion in cationic substituted compounds may not be as strong as In4Se3-x based on higher lattice thermal conductivities of the former than the latter. It is found that the cationic substitutions may weaken the effect of Peierls distortion on thermal properties for In4Se3-x while they maintain the same trend for electrical properties of In4Se3-x with different electron concentrations.",

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T1 - Effect of cationic substitution on the thermoelectric properties of In 4-xMxSe2.95 compounds (M Na, Ca, Zn, Ga, Sn, Pb; X 0.1)

AU - Ahn, Kyunghan

AU - Cho, Eunseog

AU - Rhyee, Jong Soo

AU - Il Kim, Sang

AU - Mock Lee, Sang

AU - Hyoung Lee, Kyu

PY - 2011/9/5

Y1 - 2011/9/5

N2 - We report an electrical and thermal transport study for polycrystalline samples of In4Se3-x substituted with various metals. Our experimental and theoretical investigation revealed that the Na, Ca, and Pb substitutions at the In4 site in the 4:3 indium selenide lattice are more effective for increase in electron concentration than the Zn, Ga, and Sn substitutions at other sites, and the Peierls distortion in cationic substituted compounds may not be as strong as In4Se3-x based on higher lattice thermal conductivities of the former than the latter. It is found that the cationic substitutions may weaken the effect of Peierls distortion on thermal properties for In4Se3-x while they maintain the same trend for electrical properties of In4Se3-x with different electron concentrations.

AB - We report an electrical and thermal transport study for polycrystalline samples of In4Se3-x substituted with various metals. Our experimental and theoretical investigation revealed that the Na, Ca, and Pb substitutions at the In4 site in the 4:3 indium selenide lattice are more effective for increase in electron concentration than the Zn, Ga, and Sn substitutions at other sites, and the Peierls distortion in cationic substituted compounds may not be as strong as In4Se3-x based on higher lattice thermal conductivities of the former than the latter. It is found that the cationic substitutions may weaken the effect of Peierls distortion on thermal properties for In4Se3-x while they maintain the same trend for electrical properties of In4Se3-x with different electron concentrations.

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Effect of cationic substitution on the thermoelectric properties of In _4-xM_xSe_2.95 compounds (M Na, Ca, Zn, Ga, Sn, Pb; X 0.1)

Abstract

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