Orientation of tin-phthalocyanine film on rubbing substrates

Abstract Optical properties of orientated tin-phthalocyanine (SnPc) films evaporated on two kinds of rubbing treated substrates (polyimide plates and polyamide plates, respectively) were studied by evaluating with absorption spectra, SEM and AFM techniques. On the polyimide plate, the orientation ratios of molecules with the perpendicular direction and with the parallel direction to the rubbing direction were 3 to 1. But, the direction of oriented molecules on the polyamide plate was parallel direction to the rubbing direction.