We designed and synthesized a new class of narrow bandgap conjugated polyelectrolytes (CPE) with p�conjugated cyclopenta-[2,1-b;3,4-b']-dithiophene-alt-4,7-(2,1,3-benzothiadiazole) backbones, and cationic or anionic pendant groups. The anionic CPEs were doped during dialysis as a process of purification, while the cationic ones were not doped. These CPEs all interact well with single wall carbon nanotubes (SWNT) to form stable dispersions in water. The hydrophobic interactions between CPE and SWNT are proved by UV-Vis absorptions. The thin film electrical conductivity of these composite were found to increase as the concentrations of carbon nanotube increase, while the thermopowers were almost constant, thus leading to an exceptionally high power factor. These composites are powerful candidates for organic thermoelectric applications.

Thermoelectric properties of single wall carbon nanotube/conjugated polyelectrolytes composites

248th National Meeting (2014)

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