Thermoelectric properties of Au nanoparticle-supported Sb1.6Bi0.4Te3 synthesized by a γ-ray irradiation method

Doyoung Jung; Ken Kurosaki; Satoshi Seino; Manabu Ishimaru; Kazuhisa Sato; Yuji Ohishi; Hiroaki Muta; Shinsuke Yamanaka

doi:10.1002/pssb.201349226

Thermoelectric properties of Au nanoparticle-supported Sb_1.6Bi_0.4Te₃ synthesized by a γ-ray irradiation method

Doyoung Jung, Ken Kurosaki, Satoshi Seino, Manabu Ishimaru, Kazuhisa Sato, Yuji Ohishi, Hiroaki Muta, Shinsuke Yamanaka

Cooperative Research and Development Center for Advanced Materials

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

10 Citations (Scopus)

Abstract

SbBiTe alloys have been some of the most efficient thermoelectric materials near room temperature. Here we synthesized a complete nanocomposite using γ-ray irradiation, in which Au/AuTe₂ nanoparticles are dispersed uniformly without aggregation in the Sb_1.6Bi_0.4Te₃ matrix. The lattice thermal conductivity was significantly reduced mainly due to the increased number of interfaces for phonon scattering between the nanoparticles and the matrix phase, thereby resulting in clear enhancement of dimensionless figure of merit (ZT). The maximum ZT value of the Au/AuTe₂ nanoparticle-supported Sb_1.6Bi_0.4Te₃ nanocomposite was 1.01 at 423K, which is about 18% higher than the maximum ZT value of Sb_1.6Bi_0.4Te₃.

Original language	English
Pages (from-to)	162-167
Number of pages	6
Journal	Physica Status Solidi (B) Basic Research
Volume	251
Issue number	1
DOIs	https://doi.org/10.1002/pssb.201349226
Publication status	Published - 2014 Jan

Keywords

Nanoparticles
SbBiTe alloys
Thermoelectrics
γ-ray irradiation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1002/pssb.201349226

Cite this

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title = "Thermoelectric properties of Au nanoparticle-supported Sb1.6Bi0.4Te3 synthesized by a γ-ray irradiation method",

abstract = "SbBiTe alloys have been some of the most efficient thermoelectric materials near room temperature. Here we synthesized a complete nanocomposite using γ-ray irradiation, in which Au/AuTe2 nanoparticles are dispersed uniformly without aggregation in the Sb1.6Bi0.4Te3 matrix. The lattice thermal conductivity was significantly reduced mainly due to the increased number of interfaces for phonon scattering between the nanoparticles and the matrix phase, thereby resulting in clear enhancement of dimensionless figure of merit (ZT). The maximum ZT value of the Au/AuTe2 nanoparticle-supported Sb1.6Bi0.4Te3 nanocomposite was 1.01 at 423K, which is about 18% higher than the maximum ZT value of Sb1.6Bi0.4Te3.",

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T1 - Thermoelectric properties of Au nanoparticle-supported Sb1.6Bi0.4Te3 synthesized by a γ-ray irradiation method

AU - Jung, Doyoung

AU - Kurosaki, Ken

AU - Seino, Satoshi

AU - Ishimaru, Manabu

AU - Sato, Kazuhisa

AU - Ohishi, Yuji

AU - Muta, Hiroaki

AU - Yamanaka, Shinsuke

PY - 2014/1

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N2 - SbBiTe alloys have been some of the most efficient thermoelectric materials near room temperature. Here we synthesized a complete nanocomposite using γ-ray irradiation, in which Au/AuTe2 nanoparticles are dispersed uniformly without aggregation in the Sb1.6Bi0.4Te3 matrix. The lattice thermal conductivity was significantly reduced mainly due to the increased number of interfaces for phonon scattering between the nanoparticles and the matrix phase, thereby resulting in clear enhancement of dimensionless figure of merit (ZT). The maximum ZT value of the Au/AuTe2 nanoparticle-supported Sb1.6Bi0.4Te3 nanocomposite was 1.01 at 423K, which is about 18% higher than the maximum ZT value of Sb1.6Bi0.4Te3.

AB - SbBiTe alloys have been some of the most efficient thermoelectric materials near room temperature. Here we synthesized a complete nanocomposite using γ-ray irradiation, in which Au/AuTe2 nanoparticles are dispersed uniformly without aggregation in the Sb1.6Bi0.4Te3 matrix. The lattice thermal conductivity was significantly reduced mainly due to the increased number of interfaces for phonon scattering between the nanoparticles and the matrix phase, thereby resulting in clear enhancement of dimensionless figure of merit (ZT). The maximum ZT value of the Au/AuTe2 nanoparticle-supported Sb1.6Bi0.4Te3 nanocomposite was 1.01 at 423K, which is about 18% higher than the maximum ZT value of Sb1.6Bi0.4Te3.

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KW - SbBiTe alloys

KW - Thermoelectrics

KW - γ-ray irradiation

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