Abstract: Plasma-polymerization was carried out on a series of nitriles, and polymeric filmswith conductivities ranged from 10^-12 to 10^-7 Scm^-1 were obtained.The results of infra-red spectroscopy and ultraviolet spectroscopy showed that there is a more extensive conjuga-ted structure in the polymer films obtained from monomers which have bigger conjugatedstructure.As a result, the films showed higher conductivities and the Al/polymer film/ITO (indium tin oxide) sandwich cells showed better rectifying behavior and photovolt-aic effect.

Key words: nitriles,plasma-polymerization, semiconductive film, rectifying behavior, photovotaic effect