TECHNOLOGY FOCUS - ELECTRICAL POWER AND ENERGY - Preferred Component: The first photoactive material comprises a first electron acceptor material, and the second photoactive material comprises a second electron acceptor material. Each of the photovoltaic cells comprises two electrodes. The photovoltaic module comprises an electrode shared by the photovoltaic cells. At least one of the first and second photovoltaic cells comprises a flexible substrate. Preferred Property: The angle is greater than or equal to30degrees (preferably less than or equal to60degrees). The first maximum absorption wavelength is greater than or equal to25 nm different from the second maximum absorption wavelength.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Material: The electron acceptor materials comprise inorganic nanoparticles, carbon nanorods, or inorganic nanorods. The inorganic nanoparticles comprise titanium oxide, zirconium oxide, zinc oxide, tungsten oxide, niobium oxide, lanthanum oxide, tin oxide, terbium oxide, tantalum oxide, indium phosphide, cadmium selenide, and/or lead sulfide. The electrodes comprise indium tin oxide, tin oxide, or fluorine-doped tin oxide.    TECHNOLOGY FOCUS - POLYMERS - Preferred Material: The electron acceptor materials comprise fullerenes (preferably substituted fullerenes), oxadiazoles, discotic liquid crystals, polymers containing cyano groups, and/or polymers containing CF3 groups. The flexible substrate comprises polyethylene naphthalates, polyethylene terephthalates, polyethyelenes, polypropylenes, polyamides, polymethyl methacrylate, polycarbonates, and/or polyurethanes. The first photoactive material further comprises an electron donor material including polyacetylenes, polyanilines, polyphenylenes, poly(p-phenylene vinylene)s, polythienylvinylenes, polythiophenes, polyporphyrins, porphyrinic macrocycles, polymetallocenes, polyisothianaphthalenes, polyphthalocyanines, and/or discotic liquid crystal polymers. The first photoactive material further comprises a dye including cyanines, merocyanines, phthalocyanines, pyrroles, and/or xanthines.