NOVELTY - Preparing laminated organic photosensitive device having photoactive donor-acceptor heterojunction, involves forming first portion having first electrode by depositing functional material over flexible substrate; forming second portion over second substrate and optionally containing second electrode, and/or additional functional material; where processing step is performed on one of the first/second functional material or one of the first/second electrode to form desired properties prior to lamination; and coupling first portion to second portion to form laminated organic solar cell.    USE - For preparing laminated organic photosensitive device (claimed) such as solar cells, and plastic solar cells.    ADVANTAGE - The method relates to the development of more robust, more reliable and higher efficiency photosensitive devices, having low fabrication costs.    DETAILED DESCRIPTION - Preparing laminated organic photosensitive device having at least one photoactive donor-acceptor heterojunction, involves preparing first portion containing first electrode by depositing at least one functional material over flexible substrate; preparing second portion over second substrate and optionally containing at least one of second electrode, and/or additional functional material; where at least one processing step is performed on at least one of the first and second functional material or one of the first or second electrode to obtain desired properties prior to lamination; and coupling the first portion to the second portion to form laminated organic solar cell. An INDEPENDENT CLAIM is included for preparing tandem photosensitive device involving preparing at least one first photosensitive device comprising preparing at least one first photosensitive device comprising, providing a first substrate comprising elastomeric material; depositing at least one conducting material on the elastomeric material to form first portion comprising first electrode; optionally processing the first portion comprising the first electrode with at least one pre-lamination treatment step; providing second substrate; depositing functional material, such as one that forms photoactive layer, on the second substrate to form second portion; optionally processing the second portion with at least one pre-lamination step; coupling the first portion comprising first electrode with the second portion to form the first photosensitive device; and preparing at least one second photosensitive device comprising, providing third substrate comprising an elastomeric material; depositing at least one conducting material on the elastomeric material to form a third portion comprising a third electrode; optionally processing the third electrode with at least one pre-lamination treatment step; providing fourth substrate; depositing photoactive material on the fourth substrate to form fourth portion; optionally processing the fourth portion with at least one pre-lamination step; coupling the third portion with the fourth portion to form second photosensitive device, where the coupling conditions for the first portions and the second portions of the first photosensitive device and the third portions and fourth portions of the second photosensitive device may be the same or different; and coupling the first photosensitive device with the second photosensitive device.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of soft-contact lamination process employed to fabricate organic solar cells.