The thermoelectric performance of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) pellets and free-standing PEDOT/PSS films, prepared from PEDOT/PSS solution containing the additives dimethyl sulfoxide or ethylene glycol, have been systematically investigated. It has been found that the electrical conductivity of free-standing PEDOT/PSS films is invariably much higher than that of PEDOT/PSS pellets, while there is no distinct change in the Seebeck coefficient. The highest electrical conductivity of a free-standing PEDOT/PSS film can be up to 300 S cm−1, five to six times higher than that of PEDOT/PSS pellets (55 S cm−1). The thermal conductivity was measured over a wide temperature range, indicating that PEDOT/PSS has extremely low thermal conductivity. The figure of merit (ZT) of free-standing PEDOT/PSS films with good environmental stability can be up to 10−2, an order of magnitude higher than that of pressed PEDOT/PSS pellets (10−3).
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Liu, C., Jiang, F., Huang, M. et al. Thermoelectric Performance of Poly(3,4-Ethylenedioxy-thiophene)/Poly(Styrenesulfonate) Pellets and Films. J. Electron. Mater. 40, 648–651 (2011). https://doi.org/10.1007/s11664-010-1494-8
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DOI: https://doi.org/10.1007/s11664-010-1494-8