Effect of Side Chains on Charge Transport of Anthracene-Based PPE-PPV Copolymers

The variation of the drift mobility of positive and negative charge carriers in films of anthracene-containing poly(p-phenylene-ethynylene)-alt-poly(p-phenylene-vinylene)s (AnE-PVs), differently substituted, is investigated as a function of the applied electric field. Branched 2-ethylhexyl and linear alkoxy side chains of different lengths are considered, as well as well-defined and random distributions of lateral substituents. The same conditions are used both for the deposition of the polymer films and for their characterization, which allows for the establishment of a clear relationship between the chemical structure and the charge carrier mobility.