▎ 摘　　要

NOVELTY - Producing graphene quantum dots, comprises (a) adding reduced graphene oxide and aromatic amines into polar solvent, and performing mechanical mixing to obtain a composite, (b) removing the polar solvent, and removing at least one portion of the aromatic amine compound and the reduced oxidized graphene which is not included in the complex, (c) adding the complex to non-polar solvent followed by mechanical dispersion to prepare graphene quantum dots in which the complex is decomposed, and (d) performing purification process to obtain graphene quantum dots. USE - The method is useful in producing graphene quantum dots for light emitting device (all claimed). ADVANTAGE - The method is simple and economical, and shortens processing time. The graphene quantum dots have improved stability, luminous efficiency and electrical conductivity, easily adjusts light emitting wavelength region of the light emitting diode, implements deep blue color, minimizes problem of low light efficiency, and is environmentally friendly. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) graphene quantum dots comprising aromatic amines bonded reduced graphene oxide structure, and in which emission wavelength is adjusted depending on the ratio of the reduced graphene oxide and the aromatic amine compound; and (2) light emitting device comprising a hole injection layer (200), a hole transport layer (300), an light emitting layer (400) , an electron transport layer (500), an electron injection layer and a cathode sequentially laminated on a substrate (100), where the light-emitting layer includes graphene quantum dots. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the light emitting device. Substrate (100) Hole injection layer (200) Hole transport layer (300) Light emitting layer (400) Electron transport layer (500)