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Title: Camel-back band-induced power factor enhancement of thermoelectric lead-tellurium from Boltzmann transport calculations

Abstract

Band structures of PbTe can be abnormally bended via dual-doping on both the cationic and anionic sites to form camel-back multivalley energy band structures near the band edge. As a result, additional carrier pockets and strong intervalley scattering of carriers are introduced. Boltzmann transport calculations indicate that their contradictory effects yield remarkably enhanced power factor due to the improved thermopower and almost unchanged electrical conductivity in low temperature and high carrier concentration ranges. These findings prove dual-doping-induced band bending as an effective approach to improve the thermoelectric properties of PbTe and other similar materials.

Authors:
; ; ;  [1]
  1. CAS Key Laboratory for Mechanical Behavior and Design of Materials, Department of Modern Mechanics, School of Engineering Science, University of Science and Technology of China, Hefei 230026 (China)
Publication Date:
OSTI Identifier:
22261629
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BOLTZMANN EQUATION; ELECTRIC CONDUCTIVITY; LEAD TELLURIDES; POWER FACTOR; THERMOELECTRIC PROPERTIES

Citation Formats

Wang, X. G., E-mail: wang2006@mail.ustc.edu.cn, Wang, L., E-mail: sqtb@mail.ustc.edu.cn, Liu, J., E-mail: jingliu@mail.ustc.edu.cn, and Peng, L. M., E-mail: penglm@ustc.edu.cn. Camel-back band-induced power factor enhancement of thermoelectric lead-tellurium from Boltzmann transport calculations. United States: N. p., 2014. Web. doi:10.1063/1.4870494.
Wang, X. G., E-mail: wang2006@mail.ustc.edu.cn, Wang, L., E-mail: sqtb@mail.ustc.edu.cn, Liu, J., E-mail: jingliu@mail.ustc.edu.cn, & Peng, L. M., E-mail: penglm@ustc.edu.cn. Camel-back band-induced power factor enhancement of thermoelectric lead-tellurium from Boltzmann transport calculations. United States. https://doi.org/10.1063/1.4870494
Wang, X. G., E-mail: wang2006@mail.ustc.edu.cn, Wang, L., E-mail: sqtb@mail.ustc.edu.cn, Liu, J., E-mail: jingliu@mail.ustc.edu.cn, and Peng, L. M., E-mail: penglm@ustc.edu.cn. 2014. "Camel-back band-induced power factor enhancement of thermoelectric lead-tellurium from Boltzmann transport calculations". United States. https://doi.org/10.1063/1.4870494.
@article{osti_22261629,
title = {Camel-back band-induced power factor enhancement of thermoelectric lead-tellurium from Boltzmann transport calculations},
author = {Wang, X. G., E-mail: wang2006@mail.ustc.edu.cn and Wang, L., E-mail: sqtb@mail.ustc.edu.cn and Liu, J., E-mail: jingliu@mail.ustc.edu.cn and Peng, L. M., E-mail: penglm@ustc.edu.cn},
abstractNote = {Band structures of PbTe can be abnormally bended via dual-doping on both the cationic and anionic sites to form camel-back multivalley energy band structures near the band edge. As a result, additional carrier pockets and strong intervalley scattering of carriers are introduced. Boltzmann transport calculations indicate that their contradictory effects yield remarkably enhanced power factor due to the improved thermopower and almost unchanged electrical conductivity in low temperature and high carrier concentration ranges. These findings prove dual-doping-induced band bending as an effective approach to improve the thermoelectric properties of PbTe and other similar materials.},
doi = {10.1063/1.4870494},
url = {https://www.osti.gov/biblio/22261629}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 13,
volume = 104,
place = {United States},
year = {Mon Mar 31 00:00:00 EDT 2014},
month = {Mon Mar 31 00:00:00 EDT 2014}
}