Innovative nanonetwork composed of oxide nanoparticles and single-crystalline ZnO nanowires is demonstrated as efficient photoanode in excitonic solar cells. Such architecture benefits of the capability of high sensitizer loading offered by the nanoparticles and of the direct conduction path for electrons guaranteed by the single-crystal nanowires. The combination of these features leads to improved light absorption, electron photogeneration, and charge collection. Various types of nanonetwork were implemented in a dye-sensitized solar cell architecture demonstrating great enhancement of the efficiency with respect to a nanowire photoanode of the same thickness. © 2010 by The International Society of Offshore and Polar Engineers (ISOPE).