Display device
A display device includes a first electrode, a second electrode spaced apart from the first electrode and facing the first electrode, a first insulating layer disposed to at least partially cover the first electrode and the second electrode, a second insulating layer disposed on at least a part of the first insulating layer, and a light-emitting element disposed on the second insulating layer between the first electrode and the second electrode, wherein at least a part of a lower surface of the light-emitting element is chemically bonded to the second insulating layer.
1. A display device comprising:
a first electrode and a second electrode spaced apart from the first electrode;
a light-emitting element disposed on the first electrode and the second electrode; and
an insulating layer disposed to overlapping with at least portion of the light emitting elements,
wherein at least a portion of an outer surface of the light-emitting element is chemically bonded to the insulating layer.
2. The display device of claim 1 , wherein the light-emitting element is disposed on the insulating layer.
3. The display device of claim 1 , wherein
the light-emitting element is brought into contact with the insulating layer to form the chemical bond, and
an area where the light-emitting element and the insulating layer are in contact with each other comprises a covalent bond area containing the chemical bond between the light-emitting element and the insulating layer.
4. The display device of claim 3 , wherein
the light-emitting element comprises:
a rod-like semiconductor core;
an insulation film surrounding the semiconductor core; and
a binding group coupled to the insulation film,
the insulating layer comprises a second functional group, and
the chemical bond between the light-emitting element and the insulating layer is formed by a chemical reaction between the bonding group and the second functional group.
5. The display device of claim 4 , wherein
the binding group comprises:
a main chain;
a linker coupled to the main chain and connecting the main chain with the light-emitting element; and
a first functional group substituted on the main chain, and
the first functional group forms a covalent bond with the second functional group.
6. The display device of claim 5 , wherein the main chain is selected from a group consisting of a C1-6 alkyl group, a C2-6 alkenyl group, a C2-6 alkynyl group, a phenyl group, a biphenyl group, and a naphthalene group.
7. The display device of claim 5 , wherein
the linker is selected from a group consisting of —Si(OH)3, —Si(OR)3, —(R)Si(OH)3, —(R)Si(OR)3, —B(OH)2, —B(OR)2, —(R)B(OH)2 and —(R)B(OR)2, and
the R is a carbon chain.
8. The display device of claim 5 , wherein the first functional group is selected from a group consisting of alcohol group, an alkylamine group, an acrylate group, and an epoxy group.
9. The display device of claim 1 , wherein
the insulating layer comprises one or more insulating patterns extended in a direction, and
the insulating patterns are spaced apart from one another in another direction crossing the direction.
10. The display device of claim 9 , wherein the insulating layer comprises:
a first insulating pattern partially overlapping the first electrode; and
a second insulating pattern partially overlapping the second electrode.
11. The display device of claim 10 , wherein
the first insulating pattern overlaps with one side portion of the first electrode that faces the second electrode, and
the light-emitting element is disposed on the side portion of the first electrode and one side portion of the second electrode that faces the first electrode.
12. The display device of claim 1 , wherein
the insulating layer is extending in a direction, and
the insulating layer overlaps an area between the first electrode and the second electrode, and overlaps at least portion of the first electrode and the second electrode.
13. The display device of claim 1 , wherein the insulating layer overlaps a space between the first electrode and the second electrode, but does not overlaps the first electrode and the second electrode.
14. The display device of claim 1 , wherein the insulating layer overlaps a center portion of the light-emitting element.
15. The display device of claim 1 , further comprising:
a first contact electrode electrically connected to the first electrode and the light emitting element; and
a second contact electrode electrically connected to the second electrode and the light emitting element.