Enhanced thermoelectric properties of AgSbTe(2) obtained by controlling heterophases with Ce doping

We report the enhanced thermoelectric properties of Ce-doped AgSbTe(2) (AgSb(1−x)Ce(x)Te(2)) compounds. As the Ce contents increased, the proportion of heterophase Ag(2)Te in the AgSbTe(2) gradually decreased, along with the size of the crystals. The electrical resistivity and Seebeck coefficient we...

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Autores principales: Lee, Jae Ki, Oh, Min-Wook, Ryu, Byungki, Lee, Ji Eun, Kim, Bong-Seo, Min, Bok-Ki, Joo, Sung-Jae, Lee, Hee-Woong, Park, Su-Dong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5495764/
https://www.ncbi.nlm.nih.gov/pubmed/28674398
http://dx.doi.org/10.1038/s41598-017-04885-1
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author Lee, Jae Ki
Oh, Min-Wook
Ryu, Byungki
Lee, Ji Eun
Kim, Bong-Seo
Min, Bok-Ki
Joo, Sung-Jae
Lee, Hee-Woong
Park, Su-Dong
author_facet Lee, Jae Ki
Oh, Min-Wook
Ryu, Byungki
Lee, Ji Eun
Kim, Bong-Seo
Min, Bok-Ki
Joo, Sung-Jae
Lee, Hee-Woong
Park, Su-Dong
author_sort Lee, Jae Ki
collection PubMed
description We report the enhanced thermoelectric properties of Ce-doped AgSbTe(2) (AgSb(1−x)Ce(x)Te(2)) compounds. As the Ce contents increased, the proportion of heterophase Ag(2)Te in the AgSbTe(2) gradually decreased, along with the size of the crystals. The electrical resistivity and Seebeck coefficient were dramatically affected by Ce doping and the lattice thermal conductivity was reduced. The presence of nanostructured Ag(2)Te heterophases resulted in a greatly enhanced dimensionless figure of merit, ZT of 1.5 at 673 K. These findings highlight the importance of the heterophase and doping control, which determines both electrical and thermal properties.
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spelling pubmed-54957642017-07-07 Enhanced thermoelectric properties of AgSbTe(2) obtained by controlling heterophases with Ce doping Lee, Jae Ki Oh, Min-Wook Ryu, Byungki Lee, Ji Eun Kim, Bong-Seo Min, Bok-Ki Joo, Sung-Jae Lee, Hee-Woong Park, Su-Dong Sci Rep Article We report the enhanced thermoelectric properties of Ce-doped AgSbTe(2) (AgSb(1−x)Ce(x)Te(2)) compounds. As the Ce contents increased, the proportion of heterophase Ag(2)Te in the AgSbTe(2) gradually decreased, along with the size of the crystals. The electrical resistivity and Seebeck coefficient were dramatically affected by Ce doping and the lattice thermal conductivity was reduced. The presence of nanostructured Ag(2)Te heterophases resulted in a greatly enhanced dimensionless figure of merit, ZT of 1.5 at 673 K. These findings highlight the importance of the heterophase and doping control, which determines both electrical and thermal properties. Nature Publishing Group UK 2017-07-03 /pmc/articles/PMC5495764/ /pubmed/28674398 http://dx.doi.org/10.1038/s41598-017-04885-1 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Lee, Jae Ki
Oh, Min-Wook
Ryu, Byungki
Lee, Ji Eun
Kim, Bong-Seo
Min, Bok-Ki
Joo, Sung-Jae
Lee, Hee-Woong
Park, Su-Dong
Enhanced thermoelectric properties of AgSbTe(2) obtained by controlling heterophases with Ce doping
title Enhanced thermoelectric properties of AgSbTe(2) obtained by controlling heterophases with Ce doping
title_full Enhanced thermoelectric properties of AgSbTe(2) obtained by controlling heterophases with Ce doping
title_fullStr Enhanced thermoelectric properties of AgSbTe(2) obtained by controlling heterophases with Ce doping
title_full_unstemmed Enhanced thermoelectric properties of AgSbTe(2) obtained by controlling heterophases with Ce doping
title_short Enhanced thermoelectric properties of AgSbTe(2) obtained by controlling heterophases with Ce doping
title_sort enhanced thermoelectric properties of agsbte(2) obtained by controlling heterophases with ce doping
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5495764/
https://www.ncbi.nlm.nih.gov/pubmed/28674398
http://dx.doi.org/10.1038/s41598-017-04885-1
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