Mechanical rubbing of polymer films has been widely used in the liquid crystal display
industry to prepare oriented alignment layers of polyimides. We show that this fast
orientation method can be successfully applied to a large palette of different π-conjugated
systems, ie, p-and n-type semiconducting homopolymers and alternating copolymers.
Transmission electron microscopy, grazing incidence X-ray diffraction and UV–vis
absorption spectroscopy reveal that both, the temperature of the films during rubbing and the …