In this paper, copper tetra-(2, 4-dimethyl-3-pentoxy) phthalocyanine (CuPc-712), 2-[2-methylene-1,1,3-trimethyl-
1H-benzo[e]inline]-4-[1-ethanol-2-methylquino]-cyclobutadienylium-1,3-diolate (SQ-700), and 3,4,9,10-tetra-(heptyl acetate)-
perylene (Pery-C7), attached with functional groups by covalent bonds were synthesized. In addition, bulk heterojunction diodes
made from ITO/PEDOT:PSS (CuPc-712+SQ-700+Pery-C7)/Al have been realized and studied by I−V characteristic measurements
in the dark and under illumination (ITO is indium tin oxide; PEDOT:PSS is poly(3,4-ethylene dioxythiophene) oxidized
(doped) with poly(4-styrene sulfonate)). Enhanced photosensitivity was observed in the photoreceptor made from the composite
(CuPc-712+SQ-700+Pery-C7), which was interpreted in terms of the expansion of light absorption spectrum and to charge
separation by the bulk heterojunctions. In addition, the presence of a thin PEDOT:PSS film at the ITO/(CuPc-712+SQ-700+Pery-C7)
interface allows one to achieve a significant photovoltaic efficiency of ∼0.2%