▎ 摘　　要

NOVELTY - Metal oxide semiconductor-graphene core-shell quantum dot comprises a structure, where a metal oxide semiconductor nanoparticle is a core and the core is covered with graphene in a shell shape. USE - The quantum dot is useful in LED and its fabrication (all claimed). ADVANTAGE - The quantum dot: exhibits superior electrical properties; provides LED that exhibits excellent power conversion, requires materials and equipments for fabrication at reduced cost and simple fabrication process; and allows to mass produce and enlarge the size of display and fabricating LED having different wavelengths. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) LED that is white LED, comprising the quantum dot as a single active layer; and (2) fabricating the LED, comprising: preparing a solution by adding the quantum dot to alcohol; forming a first conductive polymer layer by coating a hydrophilic polymer on a transparent electrode substrate; forming a second conductive polymer layer by coating a hydrophobic polymer on the first conductive polymer layer; forming a single active layer by coating the alcohol solution of the quantum dot on the second conductive polymer layer; forming a supplementary layer on the single active layer; and forming a metal electrode layer.