TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The polar diluent is water, and/or alcohols (including methanol, ethanol, n-propanol, 2-propanol, or n-butanol).    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The composition: comprises at least two further polymers, where the two polymers are polystyrene sulfonic acid and a copolymer of tetrafluoroethylene and of the fluorovinylether of poly(hexafluoro propylene oxide)mono(tetrafluoro vinyl sulfonic acid)ethers and their respective salts; has a weight ratio of the polythiophene to the further polymer of 1:2-1:15; further comprises at least one polar diluent. Preferred Components: The further polymer is a copolymer of tetrafluoroethylene and fluorovinylether of poly(hexafluoropropylene oxide)mono(tetrafluoro vinyl sulfonic acid)-ethers or its salts. Preferred Definitions:    M1+ = H+; and    x = 0 or 1; and    R2 = H.    EXAMPLE - Mixture of 80% of 4-(2,3-dihydrothieno(3,4-b)(1,4)dioxin-2-ylmethoxy)-1-butanesulfonic acid and 20% of 4-(3,4-dihydro-2H-thieno(3,4-b)(1,4)dioxepin-3-yl)-1-butanesulfonic acid) (EDT-S) (17.5 g) as sodium salt was dissolved in water (350 ml) under nitrogen atmosphere. Then ferric chloride (25.6 g) was added, and the solution was stirred for 2 hours at room temperature (23 degrees C). The solution was then heated at 100 degrees C, stirred for 12 hours, and worked up after cooling to room temperature. The solution was diluted with water to 3 wt.% and deionized with Lewatit S 100 (RTM: Cation exchange resin) (66 g) and Lewatit MP 62 (RTM: Anion exchange resin) (66 g) by stirring for 4 hours at 23 degrees C. This procedure was repeated for further three times to obtain the polymer (PEDT-S) solution having 80% of 4-(2,3-dihydrothieno(3,4-b)(1,4)dioxin-2-ylmethoxy)-1-butanesulfonic acid and 20% of 4-(3,4-dihydro-2H-thieno(3,4-b)(1,4)dioxepin-3-yl)-1-butanesulfonic acid, as the sodium salt. The resultant PEDT-S solution (20 g) was mixed with a 4.78 wt.% of solution of Nafion (RTM: Perfluorinated ion-exchange resin) (36.4 g) in a mixture of lower aliphatic alcohols and water to obtain the composition.