Abstract
We report optical and electronic properties of composites of soluble polythiophene derivatives and polystyrene over the full range of composition. The composite films were prepared by evaporating the solvent in an inert atmosphere from a solution containing both polymers. The films, made conducting by charge transfer doping (reaction with NOPF 6 in acetonitrile), display an insulator-metal transition at the percolation threshold: a volume fraction of ≈16% conducting polymer in polystyrene.
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