▎ 摘　　要

NOVELTY - Layered structure (I), comprises: graphene, where a basal plane of the graphene is a (0001) plane; and a layer comprising an organic material having a conjugated system disposed on the graphene, where the layer comprises the organic material having the conjugated system is bound to the (0001) plane of the graphene by a pi - pi interaction. USE - (I) is useful in an electrical device (claimed) such as LED, a solar cell, a power device, nanogenerator or an organic light-emitting device (OLED). ADVANTAGE - (I) has a lower interfacial resistance due to fewer interfacial defects and is economically efficient to produce. (I) has improved charge transport efficiency. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) preparing a layered structure comprising either coating a solution comprising the organic material having the conjugated system onto the graphene, to form the layer comprising the organic material having the conjugated system, or vapor-depositing an organic precursor material having molecular weight of 100-1000 Daltons on the graphene under conditions effective to form the layer comprising the organic material having the conjugated system; and (2) an electrical device comprising a layered structure. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a self-assembled structure of an organic material having a conjugated system disposed on graphene.