▎ 摘　　要

NOVELTY - The electronic device has a substrate and a graphene layer that is placed on the substrate (30). A semiconductor layer (50) covers the graphene layer which includes multiple nanocrystal graphenes and multiple graphene protrusions (40). A side surface of multiple graphene protrusions is uneven. Multiple graphene protrusions comprise multiple nanocrystal graphenes. The heights of multiple graphene protrusions are different from each other. USE - Electronic device such as optical device, photodetector or a solar cell. ADVANTAGE - The electricity consumption is reduced, since molybdenum disulfide is easily switched from an ON state to an OFF state. The thickness of the semiconductor layer is greater than a height of the highest graphene protrusion. The current efficiency of the electronic device is higher than the current efficiency of conventional electronic device. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method of manufacturing an electronic device. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view illustrating an electronic device with an increased graphene-semiconductor junction region. Substrate (30) Graphene protrusion (40) Semiconductor layer (50) First electrode (52) Second electrode (54)