Electrical and thermal properties of PEDOT:PSS films doped with carbon nanotubes

摘要

We report on a highly conductive polymer composite where poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS) is doped with dimethylsulfoxide (DMSO) and carbon nanotubes (CNTs). By the addition of single-walled CNTs (SWCNTs) into the DMSO-doped PEDOT:PSS solutions, the sheet resistance can be lowered from 279 Q/D to 150 Q/D without any compromise on the optical transmittance (81% at 520 nm) and surface morphology (~2 nm). Through the measurement using Fourier transform infrared (FT-IR) spectrometer, it is found that the conductivity enhancement by the addition of CNTs is related to the bonding disruption of SO_3H group with the insulating PSS chains. Furthermore, the enhanced thermal conductivity of the nanocomposite is demonstrated by its heat dissipation capability.