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Open AccessArticle

Poly(3,4-Ethylenedioxythiophene) Nanoparticles as Building Blocks for Hybrid Thermoelectric Flexible Films

1
Institute of Materials Science (ICMUV), University of Valencia, 46980 Paterna, Spain
2
Stokes Laboratories, Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
3
Institute of Molecular Science (ICMol), University of Valencia, 46980 Paterna, Spain
*
Authors to whom correspondence should be addressed.
Coatings 2020, 10(1), 22; https://doi.org/10.3390/coatings10010022
Received: 4 December 2019 / Revised: 23 December 2019 / Accepted: 24 December 2019 / Published: 28 December 2019
(This article belongs to the Special Issue Thin Films for Thermoelectric Applications)
Hybrid thermoelectric flexible films based on poly(3,4-ethylenedioxythiophene) (PEDOT) nanoparticles and carbon nanotubes were prepared by using layer-by-layer (LbL) assembly. The employed PEDOT nanoparticles were synthesized by oxidative miniemulsion polymerization by using iron(III) p-toluenesulfonate hexahydrate (FeTos) as an oxidant and poly(diallyldimethylammonium chloride) (PDADMAC) as stabilizer. Sodium deoxycholate (DOC) was used as a stabilizer to prepare the aqueous dispersions of the carbon nanotubes. Hybrid thermoelectric films were finally prepared with different monomer/oxidant molar ratios and different types of carbon nanotubes, aiming to maximize the power factor (PF). The use of single-wall (SWCNT), double-wall (DWCNT), and multiwall (MWCNT) carbon nanotubes was compared. The Seebeck coefficient was measured by applying a temperature difference between the ends of the film and the electrical conductivity was measured by the Van der Pauw method. The best hybrid film in this study exhibited a PF of 72 µW m−1K−2. These films are prepared from aqueous dispersions with relatively low-cost materials and, due to lightweight and flexible properties, they are potentially good candidates to recover waste heat in wearable electronic applications. View Full-Text
Keywords: PEDOT; nanoparticles; carbon nanotubes; hybrid material; thermoelectricity; miniemulsion; layer-by-layer assembly; electrical conductivity PEDOT; nanoparticles; carbon nanotubes; hybrid material; thermoelectricity; miniemulsion; layer-by-layer assembly; electrical conductivity
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Serrano-Claumarchirant, J.F.; Culebras, M.; Cantarero, A.; Gómez, C.M.; Muñoz-Espí, R. Poly(3,4-Ethylenedioxythiophene) Nanoparticles as Building Blocks for Hybrid Thermoelectric Flexible Films. Coatings 2020, 10, 22.

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