Method for manufacturing graphene light source, organic light-emitting device comprising graphene light source, and method for manufacturing organic light-emitting device

An organic light emitting element comprising:

• a substrate;
• a hole injection layer on the substrate;
• a hole transport layer on the hole injection layer;
• a graphene oxide layer on the hole transport layer;
• an electron transport layer on the graphene oxide layer;
• an electron injection layer on the electron transport layer;
• a first electrode electrically connected to the hole injection layer;
• and
• a second electrode electrically connected to the electron injection layer,
• wherein:
• the graphene oxide layer includes a graphene quantum dot;
• and
• the graphene oxide layer is configured to emit green light or blue light.

A method for manufacturing an organic light emitting element including a graphene light source, the method comprising:

• sequentially forming a hole injection layer, a hole transport layer, and a graphene layer on a substrate;
• forming electrodes in contact with both sides of the graphene layer;
• forming a graphene quantum dot in the graphene layer;
• performing a patterning process on the hole injection layer, the hole transport layer, and the graphene layer;
• sequentially forming an electron transport layer and an electron injection layer on the graphene quantum dot of the graphene layer;
• and
• electrically connecting the electrodes to the hole injection layer and the electron injection layer;
• wherein the forming of the graphene quantum dot includes:
• forming a nano-gap of the graphene layer;
• and
• forming a graphene oxide layer by bonding ionized oxygen to a portion of the graphene layer adjacent to one side of the nano-gap.