Effect of Viscous Solution of PEDOT: PSS on Thin Films

Abstract

Highly conductive poly (3, 4-ethylenedioxythiphene): poly (styrenesulfonate) (PEDOT:PSS) films were obtained on polyethylene
naphthalate (PEN) substrates by pretreating the solution of PEDOT:PSS by keeping in vacuum desicator. Before deposition of the films, oxygen plasma treatment was done on the substrates to increase the adhesion of the films and dimethyl sulfoxide (DMSO) was added in the solution to increase the conductivity of the films. The films were deposited by a spin coating technique and then annealed in air at 140 oC for 1h. Resistivity of the films was measured by four probe and surface morphology and
surface roughness was measured by atomic force microscope (AFM). The films obtained from 5% DMSO added PEDOT:PSS solution show highest conductivity of 1171 S/cm and transparency more than 80% in the visible region. The results show that PEDOT:PSS can be a promising electrode material for flexible and transparent electronics.