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Enhancing Thermoelectric Properties of (Cu(2)Te)(1−x)-(BiCuTeO)(x) Composites by Optimizing Carrier Concentration

Because of the high carrier concentration, copper telluride (Cu(2)Te) has a relatively low Seebeck coefficient and high thermal conductivity, which are not good for its thermoelectric performance. To simultaneously optimize carrier concentration, lower thermal conductivity and improve the stability,...

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Autores principales: Zhang, Wenyu, Zhou, Zhifang, Yang, Yueyang, Zheng, Yunpeng, Xu, Yushuai, Zou, Mingchu, Nan, Ce-Wen, Lin, Yuan-Hua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8953958/
https://www.ncbi.nlm.nih.gov/pubmed/35329548
http://dx.doi.org/10.3390/ma15062096
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author Zhang, Wenyu
Zhou, Zhifang
Yang, Yueyang
Zheng, Yunpeng
Xu, Yushuai
Zou, Mingchu
Nan, Ce-Wen
Lin, Yuan-Hua
author_facet Zhang, Wenyu
Zhou, Zhifang
Yang, Yueyang
Zheng, Yunpeng
Xu, Yushuai
Zou, Mingchu
Nan, Ce-Wen
Lin, Yuan-Hua
author_sort Zhang, Wenyu
collection PubMed
description Because of the high carrier concentration, copper telluride (Cu(2)Te) has a relatively low Seebeck coefficient and high thermal conductivity, which are not good for its thermoelectric performance. To simultaneously optimize carrier concentration, lower thermal conductivity and improve the stability, BiCuTeO, an oxygen containing compound with lower carrier concentration, is in situ formed in Cu(2)Te by a method of combining self-propagating high-temperature synthesis (SHS) with spark plasma sintering (SPS). With the incorporation of BiCuTeO, the carrier concentration decreased from 8.1 × 10(20) to 3.8 × 10(20) cm(−3), bringing the increase of power factor from ~1.91 to ~2.97 μW cm(−1) K(−2) at normal temperature. At the same time, thermal conductivity reduced from 2.61 to 1.48 W m(−1) K(−1) at 623 K. Consequently, (Cu(2)Te)(0.95)-(BiCuTeO)(0.05) composite sample reached a relatively high ZT value of 0.13 at 723 K, which is 41% higher than that of Cu(2)Te.
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spelling pubmed-89539582022-03-26 Enhancing Thermoelectric Properties of (Cu(2)Te)(1−x)-(BiCuTeO)(x) Composites by Optimizing Carrier Concentration Zhang, Wenyu Zhou, Zhifang Yang, Yueyang Zheng, Yunpeng Xu, Yushuai Zou, Mingchu Nan, Ce-Wen Lin, Yuan-Hua Materials (Basel) Article Because of the high carrier concentration, copper telluride (Cu(2)Te) has a relatively low Seebeck coefficient and high thermal conductivity, which are not good for its thermoelectric performance. To simultaneously optimize carrier concentration, lower thermal conductivity and improve the stability, BiCuTeO, an oxygen containing compound with lower carrier concentration, is in situ formed in Cu(2)Te by a method of combining self-propagating high-temperature synthesis (SHS) with spark plasma sintering (SPS). With the incorporation of BiCuTeO, the carrier concentration decreased from 8.1 × 10(20) to 3.8 × 10(20) cm(−3), bringing the increase of power factor from ~1.91 to ~2.97 μW cm(−1) K(−2) at normal temperature. At the same time, thermal conductivity reduced from 2.61 to 1.48 W m(−1) K(−1) at 623 K. Consequently, (Cu(2)Te)(0.95)-(BiCuTeO)(0.05) composite sample reached a relatively high ZT value of 0.13 at 723 K, which is 41% higher than that of Cu(2)Te. MDPI 2022-03-11 /pmc/articles/PMC8953958/ /pubmed/35329548 http://dx.doi.org/10.3390/ma15062096 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Wenyu
Zhou, Zhifang
Yang, Yueyang
Zheng, Yunpeng
Xu, Yushuai
Zou, Mingchu
Nan, Ce-Wen
Lin, Yuan-Hua
Enhancing Thermoelectric Properties of (Cu(2)Te)(1−x)-(BiCuTeO)(x) Composites by Optimizing Carrier Concentration
title Enhancing Thermoelectric Properties of (Cu(2)Te)(1−x)-(BiCuTeO)(x) Composites by Optimizing Carrier Concentration
title_full Enhancing Thermoelectric Properties of (Cu(2)Te)(1−x)-(BiCuTeO)(x) Composites by Optimizing Carrier Concentration
title_fullStr Enhancing Thermoelectric Properties of (Cu(2)Te)(1−x)-(BiCuTeO)(x) Composites by Optimizing Carrier Concentration
title_full_unstemmed Enhancing Thermoelectric Properties of (Cu(2)Te)(1−x)-(BiCuTeO)(x) Composites by Optimizing Carrier Concentration
title_short Enhancing Thermoelectric Properties of (Cu(2)Te)(1−x)-(BiCuTeO)(x) Composites by Optimizing Carrier Concentration
title_sort enhancing thermoelectric properties of (cu(2)te)(1−x)-(bicuteo)(x) composites by optimizing carrier concentration
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8953958/
https://www.ncbi.nlm.nih.gov/pubmed/35329548
http://dx.doi.org/10.3390/ma15062096
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