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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,...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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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. |
format | Online Article Text |
id | pubmed-8953958 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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