▎ 摘　　要

NOVELTY - Optical sensor (10) comprises first electrode (11), graphene quantum dot layer (15), graphene quantum dot layer which comprises multiple of first graphene quantum dots which are bonded to first functional group (16) and multiple of second graphene quantum dots which are bonded to second functional group that is different from the first functional group, and second electrode (14) which is set on the graphene quantum dot layer. USE - Optical sensor. ADVANTAGE - The optical sensor has high luminance and high quality images, increases iris recognition rate, and improves iris recognition accuracy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a image sensor, which comprises optical sensor; and signal processing layer which is configured to process an optical signal detected by the optical sensor into an electric signal. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of optical sensor. Optical sensor (10) First electrode (11) Second electrode (14) Graphene quantum dot layer (15) Functional group (16)