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US 12,006,457 B2Granted
Graphene quantum dot composite with dielectric matrix, electroluminescent device having the same, and method for manufacturing the graphene quantum dot composite
AssigneeKorea Advanced Institute of Science and Technology
InventorsSeokwoo Jeon, Minsu Park, Hyewon Yoon
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Abstract
The disclosed graphene quantum dot composite includes a dielectric matrix including a metal oxynitride, and a graphene quantum dot dispersed in the dielectric matrix. The graphene quantum dot composite can reduce the aggregation-caused photoluminescence quenching of graphene quantum dots, and can improve a photoluminescence quantum yields of a graphene quantum dot.
Claims16
A graphene quantum dot composite comprising:
- a dielectric matrix including a metal oxynitride;
- and
- a graphene quantum dot dispersed in the dielectric matrix.
A method for manufacturing a graphene quantum dot composite, the method comprising:
- preparing a mixture solution including a graphene quantum dot, a nitrogen-containing hydride and a metal hydroxide;
- and
- reacting the nitrogen-containing hydride and the metal hydroxide with each other to form a dielectric matrix including a metal oxynitride and dispersing the graphene quantum dot therein.
An electroluminescent device comprising:
- a lower electrode;
- an upper electrode spaced apart from the lower electrode;
- and
- a light-emitting layer disposed between the lower electrode and the upper electrode and including a graphene quantum dot composite,
- wherein the graphene quantum dot composite includes:
- a dielectric matrix including a metal oxynitride;
- and
- a graphene quantum dot dispersed in the dielectric matrix.
5 more elements
Dependencies are inferred from the claim text.