Conducting polymers are an attractive class of materials that combine the general properties of traditional organic polymers with the electrical conductivity of metals or semiconductors. They have potential applications in electrochromics, (1) supercapacitors, (2) antistatic and electrostatic coatings, (3) light-emitting devices, (4, 5) photovoltaics, (6) sensors, (7) etc. However, their insolubility in some solvents limits their wider use. One method to improve the processability of these polymeric materials is by preparing them in water-borne or organic dispersions. This process may have considerable environmental and economic advantages for large scale concerns. Aqueous dispersions of polypyrrole and polyaniline have been already prepared by chemical oxidative polymerization of the corresponding monomers in the presence of suitable water-soluble steric stabilizers. (8-16) Among conducting polymers, poly(3,4-ethylenedioxythiophene) (PEDOT) has been well investigated due to its good environmental stability, low band gap, low redox potential, and high optical transparency in its electrically conductive state, all properties that make it an excellent candidate for use in optoelectronics. (17-19) Despite the fact that the PEDOT−poly(styrenesulfonate) (PEDOT−PSS) mixture is largely used for photovoltaics, there is still a need to optimize the synthesis and the morphology of PEDOT in order to tune the optoelectronic properties.Read less <