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The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene)
Organic materials have been found to be promising candidates for low-temperature thermoelectric applications. In particular, poly (3-hexylthiophene) (P3HT) has been attracting great interest due to its desirable intrinsic properties, such as excellent solution processability, chemical and thermal st...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7142503/ https://www.ncbi.nlm.nih.gov/pubmed/32204569 http://dx.doi.org/10.3390/ma13061404 |
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author | Mardi, Saeed Pea, Marialilia Notargiacomo, Andrea Yaghoobi Nia, Narges Carlo, Aldo Di Reale, Andrea |
author_facet | Mardi, Saeed Pea, Marialilia Notargiacomo, Andrea Yaghoobi Nia, Narges Carlo, Aldo Di Reale, Andrea |
author_sort | Mardi, Saeed |
collection | PubMed |
description | Organic materials have been found to be promising candidates for low-temperature thermoelectric applications. In particular, poly (3-hexylthiophene) (P3HT) has been attracting great interest due to its desirable intrinsic properties, such as excellent solution processability, chemical and thermal stability, and high field-effect mobility. However, its poor electrical conductivity has limited its application as a thermoelectric material. It is therefore important to improve the electrical conductivity of P3HT layers. In this work, we studied how molecular weight (MW) influences the thermoelectric properties of P3HT films. The films were doped with lithium bis(trifluoromethane sulfonyl) imide salt (LiTFSI) and 4-tert butylpyridine (TBP). Various P3HT layers with different MWs ranging from 21 to 94 kDa were investigated. UV–Vis spectroscopy and atomic force microscopy (AFM) analysis were performed to investigate the morphology and structure features of thin films with different MWs. The electrical conductivity initially increased when the MW increased and then decreased at the highest MW, whereas the Seebeck coefficient had a trend of reducing as the MW grew. The maximum thermoelectric power factor (1.87 μW/mK(2)) was obtained for MW of 77 kDa at 333 K. At this temperature, the electrical conductivity and Seebeck coefficient of this MW were 65.5 S/m and 169 μV/K, respectively. |
format | Online Article Text |
id | pubmed-7142503 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-71425032020-04-15 The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene) Mardi, Saeed Pea, Marialilia Notargiacomo, Andrea Yaghoobi Nia, Narges Carlo, Aldo Di Reale, Andrea Materials (Basel) Article Organic materials have been found to be promising candidates for low-temperature thermoelectric applications. In particular, poly (3-hexylthiophene) (P3HT) has been attracting great interest due to its desirable intrinsic properties, such as excellent solution processability, chemical and thermal stability, and high field-effect mobility. However, its poor electrical conductivity has limited its application as a thermoelectric material. It is therefore important to improve the electrical conductivity of P3HT layers. In this work, we studied how molecular weight (MW) influences the thermoelectric properties of P3HT films. The films were doped with lithium bis(trifluoromethane sulfonyl) imide salt (LiTFSI) and 4-tert butylpyridine (TBP). Various P3HT layers with different MWs ranging from 21 to 94 kDa were investigated. UV–Vis spectroscopy and atomic force microscopy (AFM) analysis were performed to investigate the morphology and structure features of thin films with different MWs. The electrical conductivity initially increased when the MW increased and then decreased at the highest MW, whereas the Seebeck coefficient had a trend of reducing as the MW grew. The maximum thermoelectric power factor (1.87 μW/mK(2)) was obtained for MW of 77 kDa at 333 K. At this temperature, the electrical conductivity and Seebeck coefficient of this MW were 65.5 S/m and 169 μV/K, respectively. MDPI 2020-03-19 /pmc/articles/PMC7142503/ /pubmed/32204569 http://dx.doi.org/10.3390/ma13061404 Text en © 2020 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Mardi, Saeed Pea, Marialilia Notargiacomo, Andrea Yaghoobi Nia, Narges Carlo, Aldo Di Reale, Andrea The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene) |
title | The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene) |
title_full | The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene) |
title_fullStr | The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene) |
title_full_unstemmed | The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene) |
title_short | The Molecular Weight Dependence of Thermoelectric Properties of Poly (3-Hexylthiophene) |
title_sort | molecular weight dependence of thermoelectric properties of poly (3-hexylthiophene) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7142503/ https://www.ncbi.nlm.nih.gov/pubmed/32204569 http://dx.doi.org/10.3390/ma13061404 |
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