Highly conductive and transparent PEDOT:PSS with Brønsted acid and ammonium halide dopants System.
발표자
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초록
내용
Poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) is widely used as transparent electrodes owing to their solution processability, transparency, and low-cost. However, pristine PEDOT:PSS exhibits low conductivity (1 S/cm) compared to metals. Herein, we present that the electrical conductivity can be significantly improved to ~4419 S/cm through dopant system with trifluoroacetic acid (TFA) combined with ammonium halides. The mixed dopants were simply applied onto the pristine PEDOT:PSS film through spin-coating. Systematic studies of UV-vis absorption, XPS, electrical conductivity reveal that degree of doping is increasingly enhanced with the amount of the ammonium halides. High conductivity and transparency of the PEDOT:PSS electrode allowed us to replace conventional indium tin oxide electrodes of electrochromic cells, leading to robust performance such as ∆ T 62% at 622nm, low voltage.