Thermoelectric composites of poly(3-hexylthiophene) and carbon nanotubes with a large power factor
Thermoelectric composites of poly(3-hexylthiophene) and carbon nanotubes with a large power factor
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DOI：
10.1039/c2ee23406h
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发表时间：
2013-03-01
影响因子：
32.5
通讯作者：
Mueller, Christian
中科院分区：
文献类型：
--
作者：
Bounioux, Celine;Diaz-Chao, Pablo;Mueller, Christian
聚（3-己基噻吩）和单壁以及多壁碳纳米管的复合膜被证明提供有竞争力的热电性能。功率因数显著超过单独使用任一组分获得的值，条件是共轭聚合物是充分p掺杂的。单壁碳纳米管的使用一致地导致较高的电导率，其最大值高于10（3）S cm（-1），并且因此对于仅8重量%的填料含量产生25 +/-6 μ W m（-1）K-2的功率因数，并且对于42-81重量%的填料含量产生最大95 +/-12 μ W m（-1）K-2。此外，8-10重量%的碳纳米管含量不损害聚合物基质的低体积热导率，这保证了在室温下至少ZT > 10（-2）的高品质因数。所有样品都浇注在塑料基板上，强调其适用于大面积，灵活的热电应用。
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 mu W m(-1) K-2 for a filler content of only 8 wt% and a maximum 95 +/- 12 mu W 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.