A Study On The Properties Of Doped PPy And PEDOT Thermoelectric Film Materials Based On The Electrodeposition

Electrochemical deposition method is carried out to prepare polypyrrole films through the addition of P-toluene sulfonic acid(PTSA).Sb2Te3/PPy composite films were fabricated using different proportions of Sb2Te3 powders and Polypyrrole by a facile physical blending process.The Seebeck coefficients have increased from 8.4568?V/K(pure PPy films)to 35.6368 ?V/K(Sb2Te3/PPy composite films).As a result,the thermoelectric performances of these composite films enhance significantly.The electrical conductivity and Seebeck coefficient have been researched at the different temperature(300K-400K).The maximum electrical conductivity and Seebeck coefficient of composites reach 1556 S/m and 38.96?V/K at the temperature of 400K of 100-2 and 30-6 respectively,and the maximum power factor is up to 0.223 ?W/m K2.Moreover,the thermal conductivity corresponding to the Ppy and Sb2Te3/PPy composite films were 8.06 W/m K and 5.86 W/m K,respectively.In addition,organic composite films of PPy-PEDOT have been prepared by the method of cyclic voltammetry and the Seebeck coefficient of organic composite films have been enhanced to 16.92 ?V/K.there is a preliminary discussion have been done that the influence mechanism of Bi2Te3 for the thermoelectric properties of Sb2Te3/PPy composite film materials.Hall tests have been selected to achieve carrier concentration and mobility of the sample with different Seebeck coefficient.IR and EDS spectral analysis confirm the functional group and element content of composite films.Surface morphology of composite films has been observed by SEM.