Band engineering and tuning thermoelectric transport properties of p-type Bi0.52Sb1.48Te3 by Pb doping for low-temperature power generation

Kwanlae Kim; Gwansik Kim; Hwijong Lee; Kyu Hyoung Lee; Wooyoung Lee

doi:10.1016/j.scriptamat.2017.10.009

Band engineering and tuning thermoelectric transport properties of p-type Bi_0.52Sb_1.48Te₃ by Pb doping for low-temperature power generation

Kwanlae Kim, Gwansik Kim, Hwijong Lee, Kyu Hyoung Lee, Wooyoung Lee

Dept. of Manufacturing Systems and Design Engineering

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

67 Scopus citations

Abstract

Herein, we report the results of a systematic study on the effect of Pb doping on the thermoelectric transport properties of p-type BiSbTe alloys to validate its potential applications for low-temperature power generation. The maximum power factor (~ 4.4 mW m^{− 1} K^{− 2}) at 300 K was obtained using 0.31 at.% Pb-doped Bi_0.52Sb_1.48Te₃ and was found to originate from an enlarged density of states effective mass as a result of the band engineering effect. The maximum efficiency of thermoelectric power generation (η_max) could be enhanced by 150% at ΔT = 220 K when the Pb concentration was optimized.

Original language	English
Pages (from-to)	41-44
Number of pages	4
Journal	Scripta Materialia
Volume	145
DOIs	https://doi.org/10.1016/j.scriptamat.2017.10.009
State	Published - 1 Mar 2018

Keywords

Electrical properties
Point defects
Spark plasma sintering
Thermal conductivity
Thermoelectric materials

Access to Document

10.1016/j.scriptamat.2017.10.009

Cite this

@article{a290cc5e986d48cc803411f663bbaec5,

title = "Band engineering and tuning thermoelectric transport properties of p-type Bi0.52Sb1.48Te3 by Pb doping for low-temperature power generation",

abstract = "Herein, we report the results of a systematic study on the effect of Pb doping on the thermoelectric transport properties of p-type BiSbTe alloys to validate its potential applications for low-temperature power generation. The maximum power factor (\textasciitilde{} 4.4 mW m− 1 K− 2) at 300 K was obtained using 0.31 at.\% Pb-doped Bi0.52Sb1.48Te3 and was found to originate from an enlarged density of states effective mass as a result of the band engineering effect. The maximum efficiency of thermoelectric power generation (ηmax) could be enhanced by 150\% at ΔT = 220 K when the Pb concentration was optimized.",

keywords = "Electrical properties, Point defects, Spark plasma sintering, Thermal conductivity, Thermoelectric materials",

author = "Kwanlae Kim and Gwansik Kim and Hwijong Lee and Lee, \{Kyu Hyoung\} and Wooyoung Lee",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2018",

month = mar,

day = "1",

doi = "10.1016/j.scriptamat.2017.10.009",

language = "English",

volume = "145",

pages = "41--44",

journal = "Scripta Materialia",

issn = "1359-6462",

}

TY - JOUR

T1 - Band engineering and tuning thermoelectric transport properties of p-type Bi0.52Sb1.48Te3 by Pb doping for low-temperature power generation

AU - Kim, Kwanlae

AU - Kim, Gwansik

AU - Lee, Hwijong

AU - Lee, Kyu Hyoung

AU - Lee, Wooyoung

PY - 2018/3/1

Y1 - 2018/3/1

N2 - Herein, we report the results of a systematic study on the effect of Pb doping on the thermoelectric transport properties of p-type BiSbTe alloys to validate its potential applications for low-temperature power generation. The maximum power factor (~ 4.4 mW m− 1 K− 2) at 300 K was obtained using 0.31 at.% Pb-doped Bi0.52Sb1.48Te3 and was found to originate from an enlarged density of states effective mass as a result of the band engineering effect. The maximum efficiency of thermoelectric power generation (ηmax) could be enhanced by 150% at ΔT = 220 K when the Pb concentration was optimized.

AB - Herein, we report the results of a systematic study on the effect of Pb doping on the thermoelectric transport properties of p-type BiSbTe alloys to validate its potential applications for low-temperature power generation. The maximum power factor (~ 4.4 mW m− 1 K− 2) at 300 K was obtained using 0.31 at.% Pb-doped Bi0.52Sb1.48Te3 and was found to originate from an enlarged density of states effective mass as a result of the band engineering effect. The maximum efficiency of thermoelectric power generation (ηmax) could be enhanced by 150% at ΔT = 220 K when the Pb concentration was optimized.

KW - Electrical properties

KW - Point defects

KW - Spark plasma sintering

KW - Thermal conductivity

KW - Thermoelectric materials

UR - https://www.scopus.com/pages/publications/85031100633

U2 - 10.1016/j.scriptamat.2017.10.009

DO - 10.1016/j.scriptamat.2017.10.009

M3 - Article

AN - SCOPUS:85031100633

SN - 1359-6462

VL - 145

SP - 41

EP - 44

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Band engineering and tuning thermoelectric transport properties of p-type Bi_0.52Sb_1.48Te₃ by Pb doping for low-temperature power generation

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this