Thermoelectric properties of the PEDOT/SWCNT composite films prepared by a vapor phase polymerization
The poly(3,4-ethylenedioxythiophene)/single walled carbon nanotube (PEDOT/SWCNT) composite films with various SWCNT contents (0-50wt.%) have been prepared by a vapor phase polymerization technique for the first time. The Seebeck coefficients of the composite films increase with the SWCNT contents. The maximum power factor is 37.8μWmK -2 for a composite film with 35wt% SWCNT, which is 1.7 times as high as that of the film without SWCNTs. The composite film with 35wt% SWCNT has then been treated with a 0.04wt% NaBH 4 /DMSO solution and the power factor increases to 44.1μWmK -2 after the treatment. The PEDOT chains are more orderly arranged and with decreased doping level by forming composites with SWCNT and may be de-doped further after further treated with NaBH 4 /DMSO. Therefore, the Seebeck coefficient of the composite film has been further enhanced.
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