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Solvothermal synthesis of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates for high-performance thermoelectric thin films on flexible substrates

To improve thermoelectric performance of materials, the utilization of low-dimensional materials with a multi-alloy system is a promising approach. We report on the enhanced thermoelectric properties of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates using solvothermal synthesis by tuning the composition o...

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Autores principales: Kimura, Yuki, Mori, Ryotaro, Yonezawa, Susumu, Yabuki, Hayato, Namiki, Hiromasa, Ota, Yuichi, Takashiri, Masayuki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7156490/
https://www.ncbi.nlm.nih.gov/pubmed/32286446
http://dx.doi.org/10.1038/s41598-020-63374-0
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author Kimura, Yuki
Mori, Ryotaro
Yonezawa, Susumu
Yabuki, Hayato
Namiki, Hiromasa
Ota, Yuichi
Takashiri, Masayuki
author_facet Kimura, Yuki
Mori, Ryotaro
Yonezawa, Susumu
Yabuki, Hayato
Namiki, Hiromasa
Ota, Yuichi
Takashiri, Masayuki
author_sort Kimura, Yuki
collection PubMed
description To improve thermoelectric performance of materials, the utilization of low-dimensional materials with a multi-alloy system is a promising approach. We report on the enhanced thermoelectric properties of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates using solvothermal synthesis by tuning the composition of selenium (Se). Variation of the Se composition within nanoplates is demonstrated using X-ray diffraction and electron probe microanalysis. The calculated lattice parameters closely followed Vegard’s law. However, when the Se composition was extremely high, an impurity phase was observed. At a reduced Se composition, regular-hexagonal-shaped nanoplates with a size of approximately 500 nm were produced. When the Se composition was increased, the shape distribution became random with sizes more than 5 μm. To measure the thermoelectric properties, nanoplate thin films (NPTs) were formed on a flexible substrate using drop-casting, followed by thermal annealing. The resulting NPTs sufficiently adhered to the substrate during the bending condition. The electrical conductivity of the NPTs increased with an increase in the Se composition, but it rapidly decreased at an extremely high Se composition because of the presence of the impurity phase. As a result, the Bi(2)(Se(x)Te(1−x))(3) NPTs exhibited the highest power factor of 4.1 μW/(cm∙K(2)) at a Se composition of x = 0.75. Therefore, it was demonstrated that the thermoelectric performance of Bi(2)(Se(x)Te(1−x))(3) nanoplates can be improved by tuning the Se composition.
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spelling pubmed-71564902020-04-19 Solvothermal synthesis of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates for high-performance thermoelectric thin films on flexible substrates Kimura, Yuki Mori, Ryotaro Yonezawa, Susumu Yabuki, Hayato Namiki, Hiromasa Ota, Yuichi Takashiri, Masayuki Sci Rep Article To improve thermoelectric performance of materials, the utilization of low-dimensional materials with a multi-alloy system is a promising approach. We report on the enhanced thermoelectric properties of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates using solvothermal synthesis by tuning the composition of selenium (Se). Variation of the Se composition within nanoplates is demonstrated using X-ray diffraction and electron probe microanalysis. The calculated lattice parameters closely followed Vegard’s law. However, when the Se composition was extremely high, an impurity phase was observed. At a reduced Se composition, regular-hexagonal-shaped nanoplates with a size of approximately 500 nm were produced. When the Se composition was increased, the shape distribution became random with sizes more than 5 μm. To measure the thermoelectric properties, nanoplate thin films (NPTs) were formed on a flexible substrate using drop-casting, followed by thermal annealing. The resulting NPTs sufficiently adhered to the substrate during the bending condition. The electrical conductivity of the NPTs increased with an increase in the Se composition, but it rapidly decreased at an extremely high Se composition because of the presence of the impurity phase. As a result, the Bi(2)(Se(x)Te(1−x))(3) NPTs exhibited the highest power factor of 4.1 μW/(cm∙K(2)) at a Se composition of x = 0.75. Therefore, it was demonstrated that the thermoelectric performance of Bi(2)(Se(x)Te(1−x))(3) nanoplates can be improved by tuning the Se composition. Nature Publishing Group UK 2020-04-14 /pmc/articles/PMC7156490/ /pubmed/32286446 http://dx.doi.org/10.1038/s41598-020-63374-0 Text en © The Author(s) 2020 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
Kimura, Yuki
Mori, Ryotaro
Yonezawa, Susumu
Yabuki, Hayato
Namiki, Hiromasa
Ota, Yuichi
Takashiri, Masayuki
Solvothermal synthesis of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates for high-performance thermoelectric thin films on flexible substrates
title Solvothermal synthesis of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates for high-performance thermoelectric thin films on flexible substrates
title_full Solvothermal synthesis of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates for high-performance thermoelectric thin films on flexible substrates
title_fullStr Solvothermal synthesis of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates for high-performance thermoelectric thin films on flexible substrates
title_full_unstemmed Solvothermal synthesis of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates for high-performance thermoelectric thin films on flexible substrates
title_short Solvothermal synthesis of n-type Bi(2)(Se(x)Te(1−x))(3) nanoplates for high-performance thermoelectric thin films on flexible substrates
title_sort solvothermal synthesis of n-type bi(2)(se(x)te(1−x))(3) nanoplates for high-performance thermoelectric thin films on flexible substrates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7156490/
https://www.ncbi.nlm.nih.gov/pubmed/32286446
http://dx.doi.org/10.1038/s41598-020-63374-0
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