▎ 摘　　要

NOVELTY - The utility model claims a graphene-based LED with adjustable wavelength, structure of said LED is the bandgap structure combined with carrier injection in one field effect tube with P channel type formed by semi-reduction of graphene oxide. This utility model adopts the light-emitting layer half-reduction of graphene oxide is P-type semiconductor material, having good conductivity, plus injection voltage capable of generating current to increase with increasing voltage, provides carriers on the luminous layer; Combining the bandgap structure with the carrier injection in the one field effect tube with P channel type formed by semi-reduction of graphene oxide, source electrode is grounded, and the source electrode and the drain electrode between the added voltage supply carrier injection by changing the Fermi level of graphene gate voltage adjustment so as to change the light emitting wavelength of the LED. and the adjustable wavelength range interval reaches 450nm to 750nm.