Enhanced conductivity in conjugated polymer blends can be achieved by supramolecular self-assembly. The authors demonstrate that the morphology of the conducting polymer blend can be modified by crosslinking of one of its components. Ionic crosslinking of the conducting component—poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate) (PEDOT-PSS)—is shown to result in a three-dimensional network and an increase in the electrical conductivity by a few orders of magnitude. For the ionic crosslinking a bivalent cation, such as Mg2+, is used.
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Ghosh et al. (1998) studied this question.