Thermoelectric figure of merit of anisotropic bulk materials in the presence of polar optical phonon scattering

Kazuma Ikeda, Masanori Matoba

Research output: Contribution to journalArticle

Abstract

The effect of mass anisotropy on the thermoelectric figure of merit in the presence of polar optical phonon (POP) scattering is numerically studied. Electron transport is considered using the linear Boltzmann transport equation. The mass anisotropy is advantageous for the figure of merit along the principal directions of a small effective mass if phonon thermal conductivity is large. Inelasticity plays an essential role in the obtained result. The result is qualitatively different from that for an ionised impurity model.

Original languageEnglish
Pages (from-to)2189-2191
Number of pages3
JournalJapanese Journal of Applied Physics
Volume47
Issue number4 PART 1
DOIs
Publication statusPublished - 2008 Apr 18

Fingerprint

Phonon scattering
figure of merit
Anisotropy
scattering
Thermal conductivity
Boltzmann transport equation
anisotropy
Impurities
thermal conductivity
impurities
electrons
Electron Transport

Keywords

  • Anisotropy
  • Effective mass
  • Figure of merit
  • Polar optical phonon
  • Scattering
  • Thermelectric

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Thermoelectric figure of merit of anisotropic bulk materials in the presence of polar optical phonon scattering. / Ikeda, Kazuma; Matoba, Masanori.

In: Japanese Journal of Applied Physics, Vol. 47, No. 4 PART 1, 18.04.2008, p. 2189-2191.

Research output: Contribution to journalArticle

@article{36c2bc9564be4d18b0d0aa97b51139e0,
title = "Thermoelectric figure of merit of anisotropic bulk materials in the presence of polar optical phonon scattering",
abstract = "The effect of mass anisotropy on the thermoelectric figure of merit in the presence of polar optical phonon (POP) scattering is numerically studied. Electron transport is considered using the linear Boltzmann transport equation. The mass anisotropy is advantageous for the figure of merit along the principal directions of a small effective mass if phonon thermal conductivity is large. Inelasticity plays an essential role in the obtained result. The result is qualitatively different from that for an ionised impurity model.",
keywords = "Anisotropy, Effective mass, Figure of merit, Polar optical phonon, Scattering, Thermelectric",
author = "Kazuma Ikeda and Masanori Matoba",
year = "2008",
month = "4",
day = "18",
doi = "10.1143/JJAP.47.2189",
language = "English",
volume = "47",
pages = "2189--2191",
journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",
issn = "0021-4922",
publisher = "Japan Society of Applied Physics",
number = "4 PART 1",

}

TY - JOUR

T1 - Thermoelectric figure of merit of anisotropic bulk materials in the presence of polar optical phonon scattering

AU - Ikeda, Kazuma

AU - Matoba, Masanori

PY - 2008/4/18

Y1 - 2008/4/18

N2 - The effect of mass anisotropy on the thermoelectric figure of merit in the presence of polar optical phonon (POP) scattering is numerically studied. Electron transport is considered using the linear Boltzmann transport equation. The mass anisotropy is advantageous for the figure of merit along the principal directions of a small effective mass if phonon thermal conductivity is large. Inelasticity plays an essential role in the obtained result. The result is qualitatively different from that for an ionised impurity model.

AB - The effect of mass anisotropy on the thermoelectric figure of merit in the presence of polar optical phonon (POP) scattering is numerically studied. Electron transport is considered using the linear Boltzmann transport equation. The mass anisotropy is advantageous for the figure of merit along the principal directions of a small effective mass if phonon thermal conductivity is large. Inelasticity plays an essential role in the obtained result. The result is qualitatively different from that for an ionised impurity model.

KW - Anisotropy

KW - Effective mass

KW - Figure of merit

KW - Polar optical phonon

KW - Scattering

KW - Thermelectric

UR - http://www.scopus.com/inward/record.url?scp=54249143999&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=54249143999&partnerID=8YFLogxK

U2 - 10.1143/JJAP.47.2189

DO - 10.1143/JJAP.47.2189

M3 - Article

AN - SCOPUS:54249143999

VL - 47

SP - 2189

EP - 2191

JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

SN - 0021-4922

IS - 4 PART 1

ER -