Enhanced thermoelectric performance of skutterudite Co1−yNiySn1.5Te1.5−x with switchable conduction behavior

Suneesh Meledath Valiyaveettil; Mohammad Qorbani; Cheng Rong Hsing; Ta Lei Chou; Laura Paradis-Fortin; Amr Sabbah; Divya Srivastava; Duc Long Nguyen; Thi Thong Ho; Tadesse Billo; Peramaiyan Ganesan; Ching Ming Wei; Li Chyong Chen; Kuei Hsien Chen

doi:10.1016/j.mtphys.2022.100889

Enhanced thermoelectric performance of skutterudite Co_1−yNi_ySn_1.5Te_1.5−x with switchable conduction behavior

Suneesh Meledath Valiyaveettil
, Mohammad Qorbani
, Cheng Rong Hsing
, Ta Lei Chou
, Laura Paradis-Fortin
, Amr Sabbah
, Divya Srivastava
, Duc Long Nguyen
, Thi Thong Ho
, Tadesse Billo
, Peramaiyan Ganesan
, Ching Ming Wei^*
, Li Chyong Chen^*
, Kuei Hsien Chen^*

^*Corresponding author for this work

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

8 Scopus citations

Abstract

A fine control of carriers in solids is the most essential thing while exploring any functionality. For a ternary skutterudite like CoSn_1·5Te_1.5−x, which has been recently recognized as a potential material for thermoelectric conversion, the dominant carrier could be either electrons or holes via chemically tuning the quaternary Sn₂Te₂ rings in the structure. Both theoretical calculation and different spectroscopic probes, such as X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) were employed to unveil the conduction type switching details. On the other hand, a Ni-for-Co substitution was applied to enhance electronic transport, and thereby the thermoelectric power factor. Thanks to the substantial cut-off of lattice thermal conductivity by the characteristic Sn₂Te₂ rings in the skutterudite structure, ultimately a 70-fold increase in the dimensionless figure-of-merit (zT) is achieved at 723 K with the nominal composition Co_0·95Ni_0·05Sn_1·5Te_1.5.

Original language	English
Article number	100889
Journal	Materials Today Physics
Volume	28
DOIs	https://doi.org/10.1016/j.mtphys.2022.100889
State	Published - Nov 2022
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

Density functional theory
Phonon scattering
Skutterudite
Switchable carrier type
Thermoelectrics

ASJC Scopus subject areas

General Materials Science
Energy (miscellaneous)
Physics and Astronomy (miscellaneous)

Access to Document

10.1016/j.mtphys.2022.100889

Cite this

Meledath Valiyaveettil, S., Qorbani, M., Hsing, C. R., Chou, T. L., Paradis-Fortin, L., Sabbah, A., Srivastava, D., Nguyen, D. L., Ho, T. T., Billo, T., Ganesan, P., Wei, C. M., Chen, L. C., & Chen, K. H. (2022). Enhanced thermoelectric performance of skutterudite Co_1−yNi_ySn_1.5Te_1.5−x with switchable conduction behavior. Materials Today Physics, 28, Article 100889. https://doi.org/10.1016/j.mtphys.2022.100889

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title = "Enhanced thermoelectric performance of skutterudite Co1−yNiySn1.5Te1.5−x with switchable conduction behavior",

abstract = "A fine control of carriers in solids is the most essential thing while exploring any functionality. For a ternary skutterudite like CoSn1·5Te1.5−x, which has been recently recognized as a potential material for thermoelectric conversion, the dominant carrier could be either electrons or holes via chemically tuning the quaternary Sn2Te2 rings in the structure. Both theoretical calculation and different spectroscopic probes, such as X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) were employed to unveil the conduction type switching details. On the other hand, a Ni-for-Co substitution was applied to enhance electronic transport, and thereby the thermoelectric power factor. Thanks to the substantial cut-off of lattice thermal conductivity by the characteristic Sn2Te2 rings in the skutterudite structure, ultimately a 70-fold increase in the dimensionless figure-of-merit (zT) is achieved at 723 K with the nominal composition Co0·95Ni0·05Sn1·5Te1.5.",

keywords = "Density functional theory, Phonon scattering, Skutterudite, Switchable carrier type, Thermoelectrics",

author = "\{Meledath Valiyaveettil\}, Suneesh and Mohammad Qorbani and Hsing, \{Cheng Rong\} and Chou, \{Ta Lei\} and Laura Paradis-Fortin and Amr Sabbah and Divya Srivastava and Nguyen, \{Duc Long\} and Ho, \{Thi Thong\} and Tadesse Billo and Peramaiyan Ganesan and Wei, \{Ching Ming\} and Chen, \{Li Chyong\} and Chen, \{Kuei Hsien\}",

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year = "2022",

month = nov,

doi = "10.1016/j.mtphys.2022.100889",

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Meledath Valiyaveettil, S, Qorbani, M, Hsing, CR, Chou, TL, Paradis-Fortin, L, Sabbah, A, Srivastava, D, Nguyen, DL, Ho, TT, Billo, T, Ganesan, P, Wei, CM, Chen, LC & Chen, KH 2022, 'Enhanced thermoelectric performance of skutterudite Co_1−yNi_ySn_1.5Te_1.5−x with switchable conduction behavior', Materials Today Physics, vol. 28, 100889. https://doi.org/10.1016/j.mtphys.2022.100889

TY - JOUR

T1 - Enhanced thermoelectric performance of skutterudite Co1−yNiySn1.5Te1.5−x with switchable conduction behavior

AU - Meledath Valiyaveettil, Suneesh

AU - Qorbani, Mohammad

AU - Hsing, Cheng Rong

AU - Chou, Ta Lei

AU - Paradis-Fortin, Laura

AU - Sabbah, Amr

AU - Srivastava, Divya

AU - Nguyen, Duc Long

AU - Ho, Thi Thong

AU - Billo, Tadesse

AU - Ganesan, Peramaiyan

AU - Wei, Ching Ming

AU - Chen, Li Chyong

AU - Chen, Kuei Hsien

PY - 2022/11

Y1 - 2022/11

N2 - A fine control of carriers in solids is the most essential thing while exploring any functionality. For a ternary skutterudite like CoSn1·5Te1.5−x, which has been recently recognized as a potential material for thermoelectric conversion, the dominant carrier could be either electrons or holes via chemically tuning the quaternary Sn2Te2 rings in the structure. Both theoretical calculation and different spectroscopic probes, such as X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) were employed to unveil the conduction type switching details. On the other hand, a Ni-for-Co substitution was applied to enhance electronic transport, and thereby the thermoelectric power factor. Thanks to the substantial cut-off of lattice thermal conductivity by the characteristic Sn2Te2 rings in the skutterudite structure, ultimately a 70-fold increase in the dimensionless figure-of-merit (zT) is achieved at 723 K with the nominal composition Co0·95Ni0·05Sn1·5Te1.5.

AB - A fine control of carriers in solids is the most essential thing while exploring any functionality. For a ternary skutterudite like CoSn1·5Te1.5−x, which has been recently recognized as a potential material for thermoelectric conversion, the dominant carrier could be either electrons or holes via chemically tuning the quaternary Sn2Te2 rings in the structure. Both theoretical calculation and different spectroscopic probes, such as X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS) were employed to unveil the conduction type switching details. On the other hand, a Ni-for-Co substitution was applied to enhance electronic transport, and thereby the thermoelectric power factor. Thanks to the substantial cut-off of lattice thermal conductivity by the characteristic Sn2Te2 rings in the skutterudite structure, ultimately a 70-fold increase in the dimensionless figure-of-merit (zT) is achieved at 723 K with the nominal composition Co0·95Ni0·05Sn1·5Te1.5.

KW - Density functional theory

KW - Phonon scattering

KW - Skutterudite

KW - Switchable carrier type

KW - Thermoelectrics

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