Synergetic effect of grain size reduction on electronic and thermal transport properties by selectively-suppressed minority carrier mobility and enhanced boundary scattering in Bi 0.5 Sb 1.5 Te 3 alloys

Kyu Hyoung Lee, Weon Ho Shin, Hyun Sik Kim, Kimoon Lee, Jong Wook Roh, Joonyeon Yoo, Ji il Kim, Sung Wng Kim, Sang il Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Controlling electronic and thermal transport properties simultaneously is an ultimate strategy to accomplish high-performance thermoelectrics. Here, our analysis on carrier transport of a nanograined p-type Bi 0.5 Sb 1.5 Te 3 thermoelectric alloy clearly reveals that reducing grain size greatly suppresses bipolar conduction by selective suppression of minority carrier (electron) mobility, resulting in both the power factor enhancement and bipolar thermal conductivity reduction. Furthermore, it is shown how reducing grain size affects decreasing lattice thermal conductivity in respect to grain size and phonon wavelength. Therefore, minimizing grain size can enhance thermoelectric performance of Bi 0.5 Sb 1.5 Te 3 alloy by controlling both electronic and thermal transport properties synergetically.

Original languageEnglish
Pages (from-to)15-19
Number of pages5
JournalScripta Materialia
Volume160
DOIs
Publication statusPublished - 2019 Feb 1

Fingerprint

Electron transport properties
Carrier mobility
minority carriers
carrier mobility
Transport properties
Thermal conductivity
transport properties
grain size
Scattering
Carrier transport
Electron mobility
scattering
electronics
thermal conductivity
Wavelength
electron mobility
retarding
conduction
Hot Temperature
augmentation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Cite this

Lee, Kyu Hyoung ; Shin, Weon Ho ; Kim, Hyun Sik ; Lee, Kimoon ; Roh, Jong Wook ; Yoo, Joonyeon ; Kim, Ji il ; Kim, Sung Wng ; Kim, Sang il. / Synergetic effect of grain size reduction on electronic and thermal transport properties by selectively-suppressed minority carrier mobility and enhanced boundary scattering in Bi 0.5 Sb 1.5 Te 3 alloys In: Scripta Materialia. 2019 ; Vol. 160. pp. 15-19.
@article{f9939e09abc84c8b994f89d704deb496,
title = "Synergetic effect of grain size reduction on electronic and thermal transport properties by selectively-suppressed minority carrier mobility and enhanced boundary scattering in Bi 0.5 Sb 1.5 Te 3 alloys",
abstract = "Controlling electronic and thermal transport properties simultaneously is an ultimate strategy to accomplish high-performance thermoelectrics. Here, our analysis on carrier transport of a nanograined p-type Bi 0.5 Sb 1.5 Te 3 thermoelectric alloy clearly reveals that reducing grain size greatly suppresses bipolar conduction by selective suppression of minority carrier (electron) mobility, resulting in both the power factor enhancement and bipolar thermal conductivity reduction. Furthermore, it is shown how reducing grain size affects decreasing lattice thermal conductivity in respect to grain size and phonon wavelength. Therefore, minimizing grain size can enhance thermoelectric performance of Bi 0.5 Sb 1.5 Te 3 alloy by controlling both electronic and thermal transport properties synergetically.",
author = "Lee, {Kyu Hyoung} and Shin, {Weon Ho} and Kim, {Hyun Sik} and Kimoon Lee and Roh, {Jong Wook} and Joonyeon Yoo and Kim, {Ji il} and Kim, {Sung Wng} and Kim, {Sang il}",
year = "2019",
month = "2",
day = "1",
doi = "10.1016/j.scriptamat.2018.09.038",
language = "English",
volume = "160",
pages = "15--19",
journal = "Scripta Materialia",
issn = "1359-6462",
publisher = "Elsevier Limited",

}

Synergetic effect of grain size reduction on electronic and thermal transport properties by selectively-suppressed minority carrier mobility and enhanced boundary scattering in Bi 0.5 Sb 1.5 Te 3 alloys . / Lee, Kyu Hyoung; Shin, Weon Ho; Kim, Hyun Sik; Lee, Kimoon; Roh, Jong Wook; Yoo, Joonyeon; Kim, Ji il; Kim, Sung Wng; Kim, Sang il.

In: Scripta Materialia, Vol. 160, 01.02.2019, p. 15-19.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Synergetic effect of grain size reduction on electronic and thermal transport properties by selectively-suppressed minority carrier mobility and enhanced boundary scattering in Bi 0.5 Sb 1.5 Te 3 alloys

AU - Lee, Kyu Hyoung

AU - Shin, Weon Ho

AU - Kim, Hyun Sik

AU - Lee, Kimoon

AU - Roh, Jong Wook

AU - Yoo, Joonyeon

AU - Kim, Ji il

AU - Kim, Sung Wng

AU - Kim, Sang il

PY - 2019/2/1

Y1 - 2019/2/1

N2 - Controlling electronic and thermal transport properties simultaneously is an ultimate strategy to accomplish high-performance thermoelectrics. Here, our analysis on carrier transport of a nanograined p-type Bi 0.5 Sb 1.5 Te 3 thermoelectric alloy clearly reveals that reducing grain size greatly suppresses bipolar conduction by selective suppression of minority carrier (electron) mobility, resulting in both the power factor enhancement and bipolar thermal conductivity reduction. Furthermore, it is shown how reducing grain size affects decreasing lattice thermal conductivity in respect to grain size and phonon wavelength. Therefore, minimizing grain size can enhance thermoelectric performance of Bi 0.5 Sb 1.5 Te 3 alloy by controlling both electronic and thermal transport properties synergetically.

AB - Controlling electronic and thermal transport properties simultaneously is an ultimate strategy to accomplish high-performance thermoelectrics. Here, our analysis on carrier transport of a nanograined p-type Bi 0.5 Sb 1.5 Te 3 thermoelectric alloy clearly reveals that reducing grain size greatly suppresses bipolar conduction by selective suppression of minority carrier (electron) mobility, resulting in both the power factor enhancement and bipolar thermal conductivity reduction. Furthermore, it is shown how reducing grain size affects decreasing lattice thermal conductivity in respect to grain size and phonon wavelength. Therefore, minimizing grain size can enhance thermoelectric performance of Bi 0.5 Sb 1.5 Te 3 alloy by controlling both electronic and thermal transport properties synergetically.

UR - http://www.scopus.com/inward/record.url?scp=85053848543&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85053848543&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2018.09.038

DO - 10.1016/j.scriptamat.2018.09.038

M3 - Article

AN - SCOPUS:85053848543

VL - 160

SP - 15

EP - 19

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

ER -