Decoupling effect of electrical and thermal properties of Bi2Te3-polypyrrole hybrid material causing remarkable enhancement in thermoelectric performance

Cham Kim; Ju Young Baek; David Humberto Lopez; Dong Hwan Kim; Hoyoung Kim

doi:10.1016/j.jiec.2018.11.013

Decoupling effect of electrical and thermal properties of Bi₂Te₃-polypyrrole hybrid material causing remarkable enhancement in thermoelectric performance

Cham Kim
, Ju Young Baek
, David Humberto Lopez
, Dong Hwan Kim
, Hoyoung Kim

Division of Nanotechnology

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

12 Scopus citations

Abstract

We provided a Bi₂Te₃-polypyrrole hybrid material, in which energy band junction and phonon scattering effects should appear at the interface of the two components. The hybrid material exhibited increases in electrical resistivity and the Seebeck coefficient due the energy band junction, thus retaining the power factor without loss, whereas showing a great reduction in thermal conductivity because of the phonon scattering at the interface. This significant decoupling of electrical and thermal properties resulted in predominant figures of merit (ZT_max ∼ 1.21 at 100 °C and ZT_ave ∼ 1.18 at 50–150 °C) among n-type Bi₂Te₃ or Bi₂(Te,Se)₃ materials previously reported.

Original language	English
Pages (from-to)	119-126
Number of pages	8
Journal	Journal of Industrial and Engineering Chemistry
Volume	71
DOIs	https://doi.org/10.1016/j.jiec.2018.11.013
State	Published - 25 Mar 2019

Bibliographical note

Publisher Copyright:
© 2018 The Korean Society of Industrial and Engineering Chemistry

Keywords

BiTe
Energy band junction
Hybrid material
Phonon scattering
Thermoelectric

Access to Document

10.1016/j.jiec.2018.11.013

Cite this

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title = "Decoupling effect of electrical and thermal properties of Bi2Te3-polypyrrole hybrid material causing remarkable enhancement in thermoelectric performance",

abstract = "We provided a Bi2Te3-polypyrrole hybrid material, in which energy band junction and phonon scattering effects should appear at the interface of the two components. The hybrid material exhibited increases in electrical resistivity and the Seebeck coefficient due the energy band junction, thus retaining the power factor without loss, whereas showing a great reduction in thermal conductivity because of the phonon scattering at the interface. This significant decoupling of electrical and thermal properties resulted in predominant figures of merit (ZTmax ∼ 1.21 at 100 °C and ZTave ∼ 1.18 at 50–150 °C) among n-type Bi2Te3 or Bi2(Te,Se)3 materials previously reported.",

keywords = "BiTe, Energy band junction, Hybrid material, Phonon scattering, Thermoelectric",

author = "Cham Kim and Baek, \{Ju Young\} and Lopez, \{David Humberto\} and Kim, \{Dong Hwan\} and Hoyoung Kim",

note = "Publisher Copyright: {\textcopyright} 2018 The Korean Society of Industrial and Engineering Chemistry",

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day = "25",

doi = "10.1016/j.jiec.2018.11.013",

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T1 - Decoupling effect of electrical and thermal properties of Bi2Te3-polypyrrole hybrid material causing remarkable enhancement in thermoelectric performance

AU - Kim, Cham

AU - Baek, Ju Young

AU - Lopez, David Humberto

AU - Kim, Dong Hwan

AU - Kim, Hoyoung

PY - 2019/3/25

Y1 - 2019/3/25

N2 - We provided a Bi2Te3-polypyrrole hybrid material, in which energy band junction and phonon scattering effects should appear at the interface of the two components. The hybrid material exhibited increases in electrical resistivity and the Seebeck coefficient due the energy band junction, thus retaining the power factor without loss, whereas showing a great reduction in thermal conductivity because of the phonon scattering at the interface. This significant decoupling of electrical and thermal properties resulted in predominant figures of merit (ZTmax ∼ 1.21 at 100 °C and ZTave ∼ 1.18 at 50–150 °C) among n-type Bi2Te3 or Bi2(Te,Se)3 materials previously reported.

AB - We provided a Bi2Te3-polypyrrole hybrid material, in which energy band junction and phonon scattering effects should appear at the interface of the two components. The hybrid material exhibited increases in electrical resistivity and the Seebeck coefficient due the energy band junction, thus retaining the power factor without loss, whereas showing a great reduction in thermal conductivity because of the phonon scattering at the interface. This significant decoupling of electrical and thermal properties resulted in predominant figures of merit (ZTmax ∼ 1.21 at 100 °C and ZTave ∼ 1.18 at 50–150 °C) among n-type Bi2Te3 or Bi2(Te,Se)3 materials previously reported.

KW - BiTe

KW - Energy band junction

KW - Hybrid material

KW - Phonon scattering

KW - Thermoelectric

UR - https://www.scopus.com/pages/publications/85057017566

U2 - 10.1016/j.jiec.2018.11.013

DO - 10.1016/j.jiec.2018.11.013

M3 - Article

AN - SCOPUS:85057017566

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SP - 119

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JO - Journal of Industrial and Engineering Chemistry

JF - Journal of Industrial and Engineering Chemistry

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