Processing optimization of PEDOT:PSS and PEDOT:PSS/Tween 80 films

Abstract

The optimum processing conditions for PEDOT:PSS and PEDOT:PSS/Tween 80 cast films were investigated by considering film quality and resistivity. The thermal stabilities of these materials were found to strongly influence the accessible annealing temperatures, especially in the presence of the conductivity-enhancing agent Tween 80. The resistivities of PEDOT:PSS films with and without Tween 80 decreased by up to 85% with increases in both annealing temperature and time until a plateau was reached. In addition, thermal structural rearrangements of these polymers were the key driving factors that reduced resistivity, with water removal alone insufficient. Finally, the optimum processing conditions for PEDOT:PSS and PEDOT:PSS/Tween 80 films are detailed.