Abstract
Flexible transparent electrodes were fabricated by line patterning of conductive inks consisting of poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate) (PEDOT/PSS) and ethylene glycol on PET films. The average values of thickness, sheet resistance (Rs), electrical conductivity, total light transmittance (TT), and haze of the flexible transparent electrodes in the range of PEDOT/PSS dispersion between 80~95 wt% were found to be 101 nm, 160 Ω/□, 630 S/cm, 95.5% and 1.3%, respectively. The standard deviations of in-plane distributions of Rs (av. 146 Ω/□) and TT (av. 93.5%) were 3.9 Ω/□ and 0.2%, respectively, indicating high uniformity with excellent electrical and optical properties as flexible transparent electrodes. Furthermore, a polymer dispersed liquid crystal (PDLC) display was fabricated using the flexible PEDOT/PSS transparent electrodes. It was found that the PDLC display successfully operated by the opaque/transparent change due to the scattering/non-scattering transition caused by the electric field applied through top and bottom PEDOT/PSS electrodes.
