[en] Photovoltaic solar energy has been widely used as an alternative energy source. Polymers can be considered promising materials to produce organic solar cells. This work aimed to synthesize and characterize composite membranes of polysulfone and chitosan (PSF/CS) incorporated with different concentrations of nanoparticles (NPs) of nickel-zinc ferrite (PSF/CS/NZFP) and magnetite (PSF/CS/MP). The NZFP with stoichiometry Ni_0.5Zn_0.5Fe₂O₄ was synthesized by a modified polyol method, while the MP was commercially acquired. The PSF/CS membranes were produced in a 2:1 mass ratio and the NPs of NZFP or MP were added to the PSF/CS solution at concentrations of 0.018 to 0.073% (w/v). PSF/CS composite membranes incorporated with inorganic NPs were uniform, resistant, and transparent without clusters or heterogeneities. The addition of inorganic NPs can increase the efficiency of organic substrates for organic photovoltaic cells. (author)