Abstract
Polymer/inorganic thermoelectric composites have witnessed rapid progress in recent years, but most of the studies have focused on the traditional conducting polymers. The limited structures of traditional conducting polymers restrain the development of organic thermoelectric composites. Herein, we report the preparation and thermoelectric properties of a series of composites films based on SWCNTs and bipyridine-containing polyfluorene derivatives. The value of the power factor around 12 μW m−1 K−2 was achieved for the composite F8bpy/SWCNTs with a mass ratio of 50/50, and the maximum value of 62.3 μW m−1 K−2 was obtained when the mass ratio reached 10/90. Moreover, taking advantage of the bipyridine unit could chelate various kinds of metal ions to form polymer complexes. The enhanced power factor of 87.3 μW m−1 K−2 was obtained for composite F8bpy-Ni/SWCNTs with a mass ratio of 50/50. Finally, the thermoelectric properties of the bipyridine-containing polyfluorene derivative/SWCNT composites were conveniently tuned by chelating with different metal ions.
Highlights
The exploitation of sustainable and environmentally friendly energy materials has been a hot topic due to the gradual exhaustion of fossil energy [1]
We systematically investigated the effects of the different ratios of single-walled carbon nanotube loading and different types of transition metal ions on the thermoelectric properties of the composites
We have developed a series of composites with SWCNTs and bipyridine-containing
Summary
The exploitation of sustainable and environmentally friendly energy materials has been a hot topic due to the gradual exhaustion of fossil energy [1]. Some conjugated polymers used in the polymer solar cells field have been used to explore applications in organic thermoelectric materials, and some good results have been achieved [18,19,20,21,22]. Due to their low electrical conductivity, the thermoelectric properties of ICPs are still not ideal. Conductive polymer composites (CPCs), taking advantage of the good electric conductivity of inorganic materials and the large Seebeck coefficient of organic materials, exhibited enhanced thermoelectric performance compared to each single component [23,24,25,26]. We systematically investigated the effects of the different ratios of single-walled carbon nanotube loading and different types of transition metal ions on the thermoelectric properties of the composites
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