NOVELTY - Making active layer of optoelectronic device comprises: (a) forming (502) nanostructured network layer including network of regularly spaced structures with spaces between neighboring structures; (b) disposing (504) network-filling material in spaces; (c) disposing (506) interfacial layer between network layer and filling material; and (d) configuring (508) interfacial layer so that charge-carriers traveling from nanostructured network layer to network-filling material are transported at different rate than same type of charge-carriers traveling from filling material to network layer.    USE - The method is useful in making active layer of optoelectronic device (claimed) e.g. photovoltaic cells and solar cells.    ADVANTAGE - The method provides devices with enhanced light absorption, charge injection and efficiency at relatively low costs.    DETAILED DESCRIPTION - Making an active layer of an optoelectronic device comprises: (a) forming a nanostructured network layer including a network of regularly spaced structures with spaces between neighboring structures; (b) disposing a network-filling material in at least one of the space, where at least one network-filling material has complementary charge transfer properties with respect to the material of the nanostructured network layer; (c) disposing an interfacial layer between the nanostructured network layer and the network-filling material; and (d) configuring the interfacial layer to enhance an efficiency of the resulting active layer by configuring the interfacial layer so that charge-carriers traveling from the nanostructured network layer to the network-filling material are transported at a different rate than the same type of charge-carriers traveling from the network-filling material to the nanostructured network layer which includes disposing a functionalized fullerene on surfaces of structures in the nanostructured network layer, where forming the nanostructured network layer includes using a technique comprising intercalation and/or grafting of organic or polymeric molecules within a mineral lamellar network, synthesis of hybrid molecular assemblies by electrocrystallization, impregnation of preformed inorganic gels, synthesis from heterofunctional metallic alkoxides, metallic halides or silsesquioxanes, synthesis of hybrid networks through the connection of well-defined functional nano building blocks, templated growth of inorganic or hybrid networks by using organic molecules, macromolecules proteins or fibers as structure directing agents, and templated growth using nanoparticles, followed by removal of the nanoparticles.    DESCRIPTION OF DRAWING(S) - The figure shows a flow diagram illustrating a method of forming an active layer for an optoelectronic device.    Form nanostructured network layer (502)    Fill spaces in nanostructured network layer with network-filling material (504)    Dispose interfacial layer between nanostructured network layer and network-filling material (506)    Configure interfacial layer (508)    Add transparent conducting electrode (510)