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Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping
[Image: see text] Here we show that molecular doping of polymer thermoelectrics increases the electrical conductivity while reducing the thermal conductivity. A high-throughput methodology based on annealing and doping gradients within individual films is employed to self-consistently analyze and co...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7497712/ https://www.ncbi.nlm.nih.gov/pubmed/32953988 http://dx.doi.org/10.1021/acsenergylett.0c01410 |
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author | Zapata-Arteaga, Osnat Perevedentsev, Aleksandr Marina, Sara Martin, Jaime Reparaz, Juan Sebastián Campoy-Quiles, Mariano |
author_facet | Zapata-Arteaga, Osnat Perevedentsev, Aleksandr Marina, Sara Martin, Jaime Reparaz, Juan Sebastián Campoy-Quiles, Mariano |
author_sort | Zapata-Arteaga, Osnat |
collection | PubMed |
description | [Image: see text] Here we show that molecular doping of polymer thermoelectrics increases the electrical conductivity while reducing the thermal conductivity. A high-throughput methodology based on annealing and doping gradients within individual films is employed to self-consistently analyze and correlate electrical and thermal characteristics for the equivalent of >100 samples. We focus on the benchmark material system poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) doped with molecular acceptor 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ). The thermal conductivity of neat PBTTT films is dominated by the degree of crystallinity, with thermal percolation observed for annealing temperatures >170 °C. Upon doping the samples with a relatively low amount of F4TCNQ (anion content <1 mol %), the thermal conductivity exhibits a two-fold reduction without compromising the crystalline quality, which resembles the effect of alloy scattering observed in several inorganic systems. The analysis of the relation between thermal and electrical conductivities shows that thermal transport is dominated by a doping-induced reduced lattice contribution. |
format | Online Article Text |
id | pubmed-7497712 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-74977122020-09-18 Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping Zapata-Arteaga, Osnat Perevedentsev, Aleksandr Marina, Sara Martin, Jaime Reparaz, Juan Sebastián Campoy-Quiles, Mariano ACS Energy Lett [Image: see text] Here we show that molecular doping of polymer thermoelectrics increases the electrical conductivity while reducing the thermal conductivity. A high-throughput methodology based on annealing and doping gradients within individual films is employed to self-consistently analyze and correlate electrical and thermal characteristics for the equivalent of >100 samples. We focus on the benchmark material system poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) (PBTTT) doped with molecular acceptor 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ). The thermal conductivity of neat PBTTT films is dominated by the degree of crystallinity, with thermal percolation observed for annealing temperatures >170 °C. Upon doping the samples with a relatively low amount of F4TCNQ (anion content <1 mol %), the thermal conductivity exhibits a two-fold reduction without compromising the crystalline quality, which resembles the effect of alloy scattering observed in several inorganic systems. The analysis of the relation between thermal and electrical conductivities shows that thermal transport is dominated by a doping-induced reduced lattice contribution. American Chemical Society 2020-08-19 2020-09-11 /pmc/articles/PMC7497712/ /pubmed/32953988 http://dx.doi.org/10.1021/acsenergylett.0c01410 Text en Copyright © 2020 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | Zapata-Arteaga, Osnat Perevedentsev, Aleksandr Marina, Sara Martin, Jaime Reparaz, Juan Sebastián Campoy-Quiles, Mariano Reduction of the Lattice Thermal Conductivity of Polymer Semiconductors by Molecular Doping |
title | Reduction of the Lattice Thermal Conductivity of Polymer
Semiconductors by Molecular Doping |
title_full | Reduction of the Lattice Thermal Conductivity of Polymer
Semiconductors by Molecular Doping |
title_fullStr | Reduction of the Lattice Thermal Conductivity of Polymer
Semiconductors by Molecular Doping |
title_full_unstemmed | Reduction of the Lattice Thermal Conductivity of Polymer
Semiconductors by Molecular Doping |
title_short | Reduction of the Lattice Thermal Conductivity of Polymer
Semiconductors by Molecular Doping |
title_sort | reduction of the lattice thermal conductivity of polymer
semiconductors by molecular doping |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7497712/ https://www.ncbi.nlm.nih.gov/pubmed/32953988 http://dx.doi.org/10.1021/acsenergylett.0c01410 |
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