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

Department of Materials Science and Engineering

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

44 Citations (Scopus)

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
Publication status	Published - 2018 Mar 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIP) ( 2014R1A2A1A10053869 ) and the Priority Research Centers Program ( 2009-0093823 ).

Publisher Copyright:
© 2017

All Science Journal Classification (ASJC) codes

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

Access to Document

10.1016/j.scriptamat.2017.10.009

Cite this

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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 (~ 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.",

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

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AU - Lee, Kyu Hyoung

AU - Lee, Wooyoung

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIP) ( 2014R1A2A1A10053869 ) and the Priority Research Centers Program ( 2009-0093823 ). Publisher Copyright: © 2017

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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.

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