NOVELTY - Substrate for flexible photoelectric device comprises a flexible substrate and a conductive layer, where the structural composition of substrate comprises (i) flexible substrate as an ultraviolet (UV) photo-curable adhesive, and conductive layer as thin carbon nanotube, whose gap is filled with graphene, or (ii) flexible substrate as a graphene-doped UV photo-curable adhesive, and the conductive layer as thin carbon nanotube, 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.    USE - Used as a substrate for flexible photoelectric device.    ADVANTAGE - The substrate solves the problem of flatness of thin carbon nanotube surface; increases the binding force between the carbon nanotube and the flexible substrate; and improves the conductivity of conductive layer and separation ability of base plate to water and oxygen.    DETAILED DESCRIPTION - Substrate for flexible photoelectric device comprises a flexible substrate and a conductive layer, where the structural composition of substrate comprises (i) the flexible substrate as an ultraviolet (UV) photo-curable adhesive, and the conductive layer as thin carbon nanotube, whose gap is filled with graphene, or (ii) the flexible substrate as a graphene-doped UV photo-curable adhesive, and the conductive layer as thin carbon nanotube, whose gap is filled with graphene-doped UV photo-curable adhesive, where the UV photo-curable adhesive comprises a free radical type UV photo-curable adhesive, a cationic UV photo-curable adhesive, and a mixed system. The thickness of carbon nanotube layer is less than or equal to l00 nm. An INDEPENDENT CLAIM is also included for preparing the substrate for flexible photoelectron device, comprising (i) cleaning the rigid base plate, whose surface roughness is less than 1 nm, 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 the carbon nanotube layer on the clean rigid substrate, (iii) spin coating or spray coating the carbon nanotube layer with the UV photo-curable adhesive doped with graphene, or initially spin coating, or drip painting or spray graphene, and then spin coating, or drip painting or spraying 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 carbon nanotube layer and the solidified ultraviolet photo-curable adhesive layer or the ultraviolet light solidifying adhesive layer doped with the graphene from the rigid base plate surface, 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.