The PEDOT:PSS water suspension was blended with 5% EG, 1% GOPS and 0.1% dodecylbenzenesulfonic acid (DBSA). The suspension was spin coated on Kapton films that were precleaned with acetone and iso-propanol. As cast EG/GOPS-PEDOT:PSS films contained a 1:2.0 thiophene sulfur to sulfonate sulfur ratio (as determined by XPS, see Figure ), in line with previous reports (1: 2.2-2.5). Considering that PEDOT:PSS prefers a doped state with a hole density of approximately one hole per three ethylenedioxythiophene (EDOT) repeat units, roughly 83% of the sulfonates are excess, not functioning as dopants.