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Enhanced electrical properties of PEDOT:PSS via synergistic effect

ABSTRACT As a representing conducting polymer, poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) has been widely employed in organic electronics. However, the electrical conductivity for pristine PEDOT:PSS is only between 0.1 and 0.5 S/cm. In order to enhance the conductivity, the silver nanowires (Ag NWs) were synthesized to dope PEDOT:PSS. It was found the electrical conductivity of PEDOT:PSS was improved to about 200 S/cm with Ag NWs. When double-wall carbon nanotube (DWCNT) was employed together with Ag NWs, the electrical conductivity was further improved to over 2800 S/cm. We proposed the synergistic working model between Ag NWs and CNTs for such enhancement. In this work, UV-vis-NIR spectra and SEM images were also employed to investigate the mechanism of electrical conductivity enhancement.