In this study, we have fabricated efficient polymer solar cells (PSCs) by introducing a highly conductive poly(3,4-ethylene dioxy-thiophene):poly(styrene sulfonate) (PH1000) thin film treated with a combination of ethylene glycol (EG) additive and H2SO4 solution immersion as a transparent electrode (PH1000–EG–H2SO4).
Ordered microstructure and high conductivity of poly(3,4-ethylenedioxythiophene):poly-(styrene sulfonate) films for transparent anode were obtained by liquid-crystalline ionic liquids modification.