TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The inorganic molecule is zinc oxide, titanium oxide and/or cadmium selenide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The organic small molecule is a derivative of phthalocyanines, croconines, squarines, perylene diimides or fullerene.    TECHNOLOGY FOCUS - POLYMERS - Preferred Device: The device comprises various conjugated polymers, various organic small molecules and various inorganic molecules. The photovoltaic device preferably comprises: A1) blends of polythiophenes, substituted polythiophenes, regioregular poly(3-substituted thiophenes) and/or regiorandom poly(3-substituted thiophenes), with derivatives of fullerene; A2) blends of poly(p-phenylene vinylene) and/or substituted poly(p-phenylene vinylene), or derivatives with derivatives of fullerene; A3) blends of polyfluorenes and/or substituted polyfluorenes or their derivatives with derivatives of fullerene; A4) blends of polythiophenes, substituted polythiophenes, regioregular poly(3-substituted thiophene) and/or regiorandom poly(3-substituted thiophene) with single wall or multi wall carbon nanotubes; A5) blends of poly(p-phenylene vinylene and/or substituted poly(p-phenylene vinylene) or their derivatives with single wall or multi wall carbon nanotubes; or A6) blends of polyfluorenes and/or substituted polyfluorenes or their derivatives with single wall or multi wall carbon nanotubes. Preferred Method: The method (M1) involves reacting monofunctionalized regioregular poly(3-substituted thiophene) with partial or fully modified single wall or multi wall carbon nanotubes. Preferred Components: The polymer is a block copolymer, random copolymer, periodic copolymer and/or alternating polymer. The polymer is preferably poly(p-phenylene vinylene) and/or substituted poly(p-phenylene vinylene) or their derivatives; polythiophene, substituted polythiophenes, regioregular poly(3-substituted thiophenes) or regiorandom poly(3-substituted thiophenes); polyfluorene, substituted polyfluorenes or their derivatives; polyoxadiazoles and/or polyquinolines; or is a cyano substituted polythiophene having the structure (Ia). EXAMPLE - No suitable example given.