NOVELTY - Substrate for flexible photoelectric device comprises a flexible substrate and a conductive layer, where the structural composition of the substrate comprises (a) the flexible substrate as an UV photo-curable adhesive, and the conductive layer as a thin film silver nanowire, whose gap is filled with graphene; or (b) the flexible substrate as a graphene-doped UV photo-curable adhesive, and the conductive layer as silver nanowire thin film, whose gap is filled with graphene-doped UV photo-curable adhesive.    USE - Used as a substrate for flexible photoelectric device.    ADVANTAGE - The substrate solves the problem of roughness of the silver nanowire thin film; increases the binding force between the silver nanowire thin film and the flexible substrate; and improves the conductivity of the silver nanowire thin film and its surface flatness.    DETAILED DESCRIPTION - Substrate for flexible photoelectric device comprises a flexible substrate and a conductive layer, where the structural composition of the substrate comprises (a) the flexible substrate as an UV photo-curable adhesive, and the conductive layer as a thin film silver nanowire, whose gap is filled with graphene; or (b) the flexible substrate as a graphene-doped UV photo-curable adhesive, and the conductive layer as silver nanowire thin film, whose gap is filled with graphene-doped UV photo-curable adhesive, where the UV photo-curable adhesive comprises e.g. a free radical type UV photo-curable adhesive and/or cationic UV photo-curable adhesive. An INDEPENDENT CLAIM is also included for preparing the substrate for flexible photoelectric device, comprising (i) cleaning the rigid base plate, whose surface roughness is less than 1 nm, and blow drying using dry nitrogen; (ii) carrying out spin coating or spray coating or self-assembling or spray ink printing or screen printing to prepare silver nanowire thin film on the clean substrate; (iii) spin coating or spray coating the silver nanowire thin film with the UV photo-curable adhesive doped with graphene, or initially spin coating or drip-painting or spraying graphene, and then spin coating or spray coating the UV photo-curable adhesive layer; (iv) carrying out UV light curing process to the rigid base plate surface for 30 seconds; (v) peeling off the silver nanowire thin film and the solidified UV photo-curable adhesive layer or the ultraviolet light solidifying adhesive layer doped with the graphene from the rigid base plate surface, and forming the flexible conductive substrate; and (vi) testing the transmittance, electrical conductivity of the flexible conductive base plate, and each parameter of the surface appearance.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the substrate for flexible photoelectric device.