Lambertus Groenendaal

Poly(3,4‐ethylenedioxythiophene) and Its Derivatives: Past, Present, and Future

An overview of one of the most successful conducting polymers, poly(3,4-ethylenedioxythiophene) (PEDT) and its derivatives, is presented, detailing its early development, the synthesis of numerous hybrid and derivative materials, along with a description of the broad array of properties accessible and a description of a set of the more prominent applications in which they can be utilized. Synthetic flexibility and facility is the key to the many new 3,4-ethylenedioxythiophene- (EDT-) based monomers, oligomers, and (co) polymers. These (co) polymers provide highly conducting and especially stable doped states, a range of optical properties with electronic bandgaps varying across the entire visible spectrum, and enhanced redox properties, making them useful for numerous electrochemical devices. Present and future applications for PEDT that are discussed include static charge dissipation films and electrode materials in solid electrolyte capacitors.

In situ conductivity measurements on polyethylenedioxythiophene derivatives with different counter ions

Abstract 3,4-Ethylenedioxythiophene (EDT) and thieno-(3,4-b)-2,3-dihydro-2-tetradecyl-1,4-dioxane (EDT-C14) were electrochemically deposited onto Pt using different electrolytes in acetonitrile. The resulting PEDT films containing different counter ions were subsequently characterized and their in situ conductivity values were measured using a two band electrode. The latter showed that the highest conductivities were obtained with ClO4− and BF4− as counter ions. Furthermore, the morphology, and thus the conductive properties, of the films seem to be strongly dependent on the applied polymerization potential.