Carrier concentration tuning in thermoelectric thiospinel Cu 2 CoTi 3 S 8 by oxidative extraction of copper

Katsuaki Hashikuni, Koichiro Suekuni, Kosuke Watanabe, Yohan Bouyrie, Michihiro Ohta, Michitaka Ohtaki, Toshiro Takabatake

研究成果: ジャーナルへの寄稿記事

3 引用 (Scopus)

抄録

We report a method for carrier concentration tuning in the thermoelectric thiospinel Cu 2 CoTi 3 S 8 , which exhibits an n-type metallic character and a high power factor. An oxidative Cu extraction treatment produced Cu defects, resulting in Cu 2−x CoTi 3 S 8 up to x = 0.62. The electron carrier concentration was effectively reduced by this treatment, leading to the decrease in power factor, whereas the electronic contribution to the thermal conductivity was suppressed. As a result, the dimensionless figure of merit ZT remained unchanged as 0.2 at 670 K in the whole range of x ≤ 0.62. The oxidative Cu extraction described in this paper offers an opportunity to tune the electron carrier concentration for Cu-containing thermoelectric materials.

元の言語英語
ページ(範囲)5-10
ページ数6
ジャーナルJournal of Solid State Chemistry
259
DOI
出版物ステータス出版済み - 3 1 2018

Fingerprint

Carrier concentration
Copper
Tuning
tuning
copper
thermoelectric materials
Electrons
figure of merit
Thermal conductivity
electrons
thermal conductivity
Defects
defects
electronics
S(8)

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

これを引用

Carrier concentration tuning in thermoelectric thiospinel Cu 2 CoTi 3 S 8 by oxidative extraction of copper . / Hashikuni, Katsuaki; Suekuni, Koichiro; Watanabe, Kosuke; Bouyrie, Yohan; Ohta, Michihiro; Ohtaki, Michitaka; Takabatake, Toshiro.

:: Journal of Solid State Chemistry, 巻 259, 01.03.2018, p. 5-10.

研究成果: ジャーナルへの寄稿記事

Hashikuni, Katsuaki ; Suekuni, Koichiro ; Watanabe, Kosuke ; Bouyrie, Yohan ; Ohta, Michihiro ; Ohtaki, Michitaka ; Takabatake, Toshiro. / Carrier concentration tuning in thermoelectric thiospinel Cu 2 CoTi 3 S 8 by oxidative extraction of copper :: Journal of Solid State Chemistry. 2018 ; 巻 259. pp. 5-10.
@article{6e40925c2de944c095cc7d830f20e15f,
title = "Carrier concentration tuning in thermoelectric thiospinel Cu 2 CoTi 3 S 8 by oxidative extraction of copper",
abstract = "We report a method for carrier concentration tuning in the thermoelectric thiospinel Cu 2 CoTi 3 S 8 , which exhibits an n-type metallic character and a high power factor. An oxidative Cu extraction treatment produced Cu defects, resulting in Cu 2−x CoTi 3 S 8 up to x = 0.62. The electron carrier concentration was effectively reduced by this treatment, leading to the decrease in power factor, whereas the electronic contribution to the thermal conductivity was suppressed. As a result, the dimensionless figure of merit ZT remained unchanged as 0.2 at 670 K in the whole range of x ≤ 0.62. The oxidative Cu extraction described in this paper offers an opportunity to tune the electron carrier concentration for Cu-containing thermoelectric materials.",
author = "Katsuaki Hashikuni and Koichiro Suekuni and Kosuke Watanabe and Yohan Bouyrie and Michihiro Ohta and Michitaka Ohtaki and Toshiro Takabatake",
year = "2018",
month = "3",
day = "1",
doi = "10.1016/j.jssc.2017.12.031",
language = "English",
volume = "259",
pages = "5--10",
journal = "Journal of Solid State Chemistry",
issn = "0022-4596",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Carrier concentration tuning in thermoelectric thiospinel Cu 2 CoTi 3 S 8 by oxidative extraction of copper

AU - Hashikuni, Katsuaki

AU - Suekuni, Koichiro

AU - Watanabe, Kosuke

AU - Bouyrie, Yohan

AU - Ohta, Michihiro

AU - Ohtaki, Michitaka

AU - Takabatake, Toshiro

PY - 2018/3/1

Y1 - 2018/3/1

N2 - We report a method for carrier concentration tuning in the thermoelectric thiospinel Cu 2 CoTi 3 S 8 , which exhibits an n-type metallic character and a high power factor. An oxidative Cu extraction treatment produced Cu defects, resulting in Cu 2−x CoTi 3 S 8 up to x = 0.62. The electron carrier concentration was effectively reduced by this treatment, leading to the decrease in power factor, whereas the electronic contribution to the thermal conductivity was suppressed. As a result, the dimensionless figure of merit ZT remained unchanged as 0.2 at 670 K in the whole range of x ≤ 0.62. The oxidative Cu extraction described in this paper offers an opportunity to tune the electron carrier concentration for Cu-containing thermoelectric materials.

AB - We report a method for carrier concentration tuning in the thermoelectric thiospinel Cu 2 CoTi 3 S 8 , which exhibits an n-type metallic character and a high power factor. An oxidative Cu extraction treatment produced Cu defects, resulting in Cu 2−x CoTi 3 S 8 up to x = 0.62. The electron carrier concentration was effectively reduced by this treatment, leading to the decrease in power factor, whereas the electronic contribution to the thermal conductivity was suppressed. As a result, the dimensionless figure of merit ZT remained unchanged as 0.2 at 670 K in the whole range of x ≤ 0.62. The oxidative Cu extraction described in this paper offers an opportunity to tune the electron carrier concentration for Cu-containing thermoelectric materials.

UR - http://www.scopus.com/inward/record.url?scp=85040012936&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85040012936&partnerID=8YFLogxK

U2 - 10.1016/j.jssc.2017.12.031

DO - 10.1016/j.jssc.2017.12.031

M3 - Article

VL - 259

SP - 5

EP - 10

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

SN - 0022-4596

ER -