Light emitting body

摘要

A light emitting body has a base material containing a graphene structure and a covering material for covering a surface of the base material. The graphene structure preferably includes a sheet portion made of a monolayer or multilayer graphene nanosheet and having, at an edge portion thereof, an armchair edge-face portion; and a terminal six-membered ring bound to the armchair edge-face portion while sharing only one side therewith. Further, the graphene structure preferably includes a nitrogen-containing functional group bound to any one or more carbon atoms selected from (a) carbon atoms constituting the terminal six-membered ring but not bound to the armchair edge-face portion, and (b) carbon atoms constituting the sheet portion (including carbon atom on the side shared with the terminal six-membered ring).

主权项

1. A light emitting body comprising:
a base material containing a graphene structure; and a covering material for covering a surface of the base material,wherein:
the graphene structure comprises:
a sheet portion made of a monolayer or multilayer graphene nanosheet and having, at the edge portion thereof, an armchair edge-face portion;a terminal six-membered ring bound to the armchair edge-face portion while sharing only one side therewith; anda nitrogen-containing functional group bound to any one or more carbon atoms selected from:
(a) carbon atoms constituting the terminal six-membered ring but not bound to the armchair edge-face portion, and(b) carbon atoms constituting the sheet portion including carbon atom on the side shared with the terminal six-membered ring; the graphene structure has an average mass of 1000 m/z to 50000 m/z; the graphene structure has a nitrogen content of 5 wt % to 50 wt %; the graphene structure is obtained by dispersing graphite oxide and/or graphene oxide in an aqueous solution having urea and/or ammonia dissolved therein and heating the resulting aqueous solution at 60° C. or greater; and the light emitting body has an emission efficiency of 15% or greater.