Substitution of phthalocyanines affecting the properties of their films and heterostructures

► Sulphonamide phthalocyanines are soluble and the films can be solution processed. ► Sulphonamide substitution of zinc phthalocyanine does not affect photovoltage in film. ► Amine substitution of phthalocyanines decreases photosensitivity of the material. ► The maximum photosensitivity was observed in the heterostructures with pentacene.