Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3

Kyu Hyoung Lee; Soon Mok Choi; Sang Il Kim; Jong Wook Roh; Dae Jin Yang; Weon Ho Shin; Hee Jung Park; Kimoon Lee; Sungwoo Hwang; Jeong Hoon Lee; Hyeona Mun; Sung Wng Kim

doi:10.1016/j.cap.2014.12.006

Doping effects on the thermoelectric properties of Cu-intercalated Bi₂Te_2.7Se_0.3

Kyu Hyoung Lee, Soon Mok Choi, Sang Il Kim, Jong Wook Roh, Dae Jin Yang, Weon Ho Shin, Hee Jung Park, Kimoon Lee, Sungwoo Hwang, Jeong Hoon Lee, Hyeona Mun, Sung Wng Kim

Department of Materials Science and Engineering

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

24 Scopus citations

Abstract

We herein report an enhancement of the thermoelectric performance of spark plasma sintered polycrystalline n-type Bi₂Te_2.7Se_0.3 by the intercalation of Cu and the doping of Al on Bi-sites. Through the intercalation of a small amount of Cu (0.008), the reproducibility could be significantly improved, with ZT was enhanced from 0.64 to 0.73 at 300 K due to the reduced lattice thermal conductivity benefiting from intensified point-defect phonon scattering. We also found that Al is an effective doping element for power factor enhancement and for reducing the lattice thermal conductivity of Cu-intercalated Bi₂Te_2.7Se_0.3. With these synergetic effects, an enhanced ZT values of 0.78 at 300 K and 0.81 at 360 K were obtained in 1 at% Al-doped Cu_0.008Bi₂Te_2.7Se_0.3 (Cu_0.008Bi_1.98Al_0.02Te_2.7Se_0.3).

Original language	English
Pages (from-to)	190-193
Number of pages	4
Journal	Current Applied Physics
Volume	15
Issue number	3
DOIs	https://doi.org/10.1016/j.cap.2014.12.006
State	Published - Mar 2015

Keywords

Doping
Intercalation
Lattice thermal conductivity
Thermoelectric

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@article{b5a5e56efbf84ef59deacaaa4934fe52,

title = "Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3",

abstract = "We herein report an enhancement of the thermoelectric performance of spark plasma sintered polycrystalline n-type Bi2Te2.7Se0.3 by the intercalation of Cu and the doping of Al on Bi-sites. Through the intercalation of a small amount of Cu (0.008), the reproducibility could be significantly improved, with ZT was enhanced from 0.64 to 0.73 at 300 K due to the reduced lattice thermal conductivity benefiting from intensified point-defect phonon scattering. We also found that Al is an effective doping element for power factor enhancement and for reducing the lattice thermal conductivity of Cu-intercalated Bi2Te2.7Se0.3. With these synergetic effects, an enhanced ZT values of 0.78 at 300 K and 0.81 at 360 K were obtained in 1 at% Al-doped Cu0.008Bi2Te2.7Se0.3 (Cu0.008Bi1.98Al0.02Te2.7Se0.3).",

keywords = "Doping, Intercalation, Lattice thermal conductivity, Thermoelectric",

author = "Lee, {Kyu Hyoung} and Choi, {Soon Mok} and Kim, {Sang Il} and Roh, {Jong Wook} and Yang, {Dae Jin} and Shin, {Weon Ho} and Park, {Hee Jung} and Kimoon Lee and Sungwoo Hwang and Lee, {Jeong Hoon} and Hyeona Mun and Kim, {Sung Wng}",

year = "2015",

month = mar,

doi = "10.1016/j.cap.2014.12.006",

language = "English",

volume = "15",

pages = "190--193",

journal = "Current Applied Physics",

issn = "1567-1739",

publisher = "Elsevier B.V.",

number = "3",

}

TY - JOUR

T1 - Doping effects on the thermoelectric properties of Cu-intercalated Bi2Te2.7Se0.3

AU - Lee, Kyu Hyoung

AU - Choi, Soon Mok

AU - Kim, Sang Il

AU - Roh, Jong Wook

AU - Yang, Dae Jin

AU - Shin, Weon Ho

AU - Park, Hee Jung

AU - Lee, Kimoon

AU - Hwang, Sungwoo

AU - Lee, Jeong Hoon

AU - Mun, Hyeona

AU - Kim, Sung Wng

PY - 2015/3

Y1 - 2015/3

N2 - We herein report an enhancement of the thermoelectric performance of spark plasma sintered polycrystalline n-type Bi2Te2.7Se0.3 by the intercalation of Cu and the doping of Al on Bi-sites. Through the intercalation of a small amount of Cu (0.008), the reproducibility could be significantly improved, with ZT was enhanced from 0.64 to 0.73 at 300 K due to the reduced lattice thermal conductivity benefiting from intensified point-defect phonon scattering. We also found that Al is an effective doping element for power factor enhancement and for reducing the lattice thermal conductivity of Cu-intercalated Bi2Te2.7Se0.3. With these synergetic effects, an enhanced ZT values of 0.78 at 300 K and 0.81 at 360 K were obtained in 1 at% Al-doped Cu0.008Bi2Te2.7Se0.3 (Cu0.008Bi1.98Al0.02Te2.7Se0.3).

AB - We herein report an enhancement of the thermoelectric performance of spark plasma sintered polycrystalline n-type Bi2Te2.7Se0.3 by the intercalation of Cu and the doping of Al on Bi-sites. Through the intercalation of a small amount of Cu (0.008), the reproducibility could be significantly improved, with ZT was enhanced from 0.64 to 0.73 at 300 K due to the reduced lattice thermal conductivity benefiting from intensified point-defect phonon scattering. We also found that Al is an effective doping element for power factor enhancement and for reducing the lattice thermal conductivity of Cu-intercalated Bi2Te2.7Se0.3. With these synergetic effects, an enhanced ZT values of 0.78 at 300 K and 0.81 at 360 K were obtained in 1 at% Al-doped Cu0.008Bi2Te2.7Se0.3 (Cu0.008Bi1.98Al0.02Te2.7Se0.3).

KW - Doping

KW - Intercalation

KW - Lattice thermal conductivity

KW - Thermoelectric

UR - http://www.scopus.com/inward/record.url?scp=84919765347&partnerID=8YFLogxK

U2 - 10.1016/j.cap.2014.12.006

DO - 10.1016/j.cap.2014.12.006

M3 - Article

AN - SCOPUS:84919765347

SN - 1567-1739

VL - 15

SP - 190

EP - 193

JO - Current Applied Physics

JF - Current Applied Physics

IS - 3

ER -

Doping effects on the thermoelectric properties of Cu-intercalated Bi₂Te_2.7Se_0.3

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Keywords

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