NOVELTY - A light-to-energy device comprises two substrates each with conductive surfaces; a pattern of semiconductor elements on the conductive pattern; and an adhesive that fixes the two substrates together. Each semiconductor element comprises a charge donor layer side and a charge acceptor side. The substrates are fixed together so that the charge donor or charge acceptor side is in electrical communication with first conductive surface and the other of the charge donor and charge acceptor side is in electrical communication with the second conductive surface.    USE - For sheets of light active material useful as a photo-radiation source for general illumination, architectural lighting, novelty lighting, display backlighting, heads-up displays, commercial and roadway signage, monochromatic and full-color static and video displays, radiation-source for photocurable materials, and patterned light emissive images. The sheets of light active material may also be used as a light-to-energy device for converting photo-radiation to electrical energy for solar panels, charged coupled-type cameras, and photo-sensors.    ADVANTAGE - The light-to-energy device can be mass produced at relatively low cost. It has an efficient chip packing density that enables a high-intensity photo-radiation source with narrow emission band.    DETAILED DESCRIPTION - A light-to-energy device comprises two substrates each with conductive surfaces; a pattern of semiconductor elements on the conductive pattern; and an adhesive that fixes the two substrates together. Each semiconductor element comprises a charge donor layer side and a charge acceptor side. The substrates are fixed together so that the charge donor or charge acceptor side is in electrical communication with first conductive surface and the other of the charge donor and charge acceptor side is in electrical communication with the second conductive surface. The first conductive surface is formed as a conductive pattern comprising a conductive coating, a conductive ink, and/or a conductive adhesive. The adhesive layer comprises a conductive adhesive, a semi-conductive adhesive, an insulative adhesive, a conductive polymer, a semi-conductive polymer, and/or an insulative polymer.    DESCRIPTION OF DRAWING(S) - The figure illustrates the method for manufacturing a patterned light active sheet.