(sigma) -conjugated polymers represent a new group of charge-transporting molecular materials. The charge carrier transport is influenced by two factors: delocalized movement inside conjugated domains and intra- and interchain hopping. Polarons play an important role. Electrostatic interactions of polar additives or attached polar side groups with polarons influence the polaron binding energy and the charge hopping.
"σ-conjugated molecular wires", Proc. SPIE 2780, Metal/Nonmetal Microsystems: Physics, Technology, and Applications, (8 April 1996); doi: 10.1117/12.238177; https://doi.org/10.1117/12.238177