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Thermoelectric composites of poly(3-hexylthiophene) and carbon nanotubes with a large power factor
Authors
Celine Bounioux
Mariano Campoy Quiles
+5 more
Pablo Díaz Chao
Alejandro R. Goñi
Marisol Martín-González
Christian Müller
Rachel Yerushalmi-Rozene
Publication date
1 June 2016
Publisher
'Royal Society of Chemistry (RSC)'
Doi
Cite
Abstract
Composite films of poly(3-hexylthiophene) and single- as well as multi-walled carbon nanotubes are demonstrated to offer a competitive thermoelectric performance. The power factor significantly exceeds values obtained with either constituent alone provided that the conjugated polymer is sufficiently p-doped. The use of single-walled carbon nanotubes consistently results in a higher electrical conductivity with a maximum value above 10 3 S cm-1 and thus gives rise to a power factor of 25 ± 6 μW m-1 K-2 for a filler content of only 8 wt% and a maximum 95 ± 12 μW m-1 K-2 for 42-81 wt%. Moreover, a carbon nanotube content of 8-10 wt% does not compromise the low bulk thermal conductivity of the polymer matrix, which promises a high figure of merit of at least ZT > 10-2 at room-temperature. All samples are cast on plastic substrates, emphasising their suitability for large-area, flexible thermoelectric applications. © 2013 The Royal Society of Chemistry.This work was supported by the Ministerio de Economía y Competitividad through Grant CSD2010-00044 (Consolider NANOTHERM). C.M. gratefully acknowledges financial support from the CSIC through the JAE-Doc program (European Social Fund). M.C.-Q. thanks the Ministerio de Economía y Competitividad for funding through a Ramón y Cajal fellowship. M.S.M.-G. acknowledges the ERC for funding through an ERC 2008 Starting Grant “Nano-TEC” number 240497.Peer Reviewe
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Last time updated on 18/08/2016