Enhanced Thermoelectric Performances of Oxalic Acid-treated Poly(3,4-ethylenedioxythiophene):Poly(4-styrenesulfonate) Free-standing Films

摘要

Thermoelectric properties of poly(3,4-ethylenedioythiophene):poly(styrenesulfonate) (PEDOT:PSS) free-standing films treated with oxalic acid were investigated. The electrical conductivity was enhanced to 393 S/cm. Moreover the Seebeck coefficient is kept at the same level as that of pristine PEDOT:PSS film. The maximum power factor was up to 9.7 μW/(m·K~2) at 300 K and the estimated highest Z_T was 2×10~(-2). It therefore provides a good way to improve the thermoelectric performances of PEDOT:PSS film.