Light-emitting device and method for manufacturing light-emitting device
View Patent ↗A highly reliable flexible light-emitting device is provided. The light-emitting device includes a first flexible substrate, a second flexible substrate, a light-emitting element between the first flexible substrate and the second flexible substrate, a first bonding layer; and a second bonding layer in a frame shape surrounding the first bonding layer. The first bonding layer and the second bonding layer are between the second flexible substrate and the light-emitting element. The light-emitting element includes layer containing a light-emitting organic compound between the pair of electrodes. The second bonding layer has a higher gas barrier property than the first bonding layer.
1. A light-emitting device comprising:
a first flexible substrate;
a second flexible substrate;
a light-emitting element between the first flexible substrate and the second flexible substrate;
a first bonding layer between the second flexible substrate and the light-emitting element;
a second bonding layer surrounding the first bonding layer; and
a third bonding layer surrounding the second bonding layer,
wherein the light-emitting element comprises a layer containing a light-emitting organic compound between a pair of electrodes, and
wherein at least one of the second bonding layer and the third bonding layer has a higher gas barrier property than the first bonding layer.
2. The light-emitting device according to claim 1 , wherein the second bonding layer has a frame shape.
3. The light-emitting device according to claim 1 , wherein a permeation amount of water vapor of one or both of the second bonding layer and the third bonding layer is lower than or equal to 1×10 −8 [g/m 2 ·day].
4. The light-emitting device according to claim 1 , further comprising:
a transistor between the first flexible substrate and the light-emitting element; and
an adhesive layer between the first flexible substrate and the transistor.
5. The light-emitting device according to claim 1 , further comprising:
a first insulating layer between the first flexible substrate and the light-emitting element;
a transistor between the first insulating layer and the light-emitting element;
a coloring layer between the light-emitting element and the second flexible substrate; and
a second insulating layer between the coloring layer and the second flexible substrate.
6. An electronic device comprising the light-emitting device according to claim 1 .
7. A lighting device comprising the light-emitting device according to claim 1 .
8. A light-emitting device comprising:
a first flexible substrate;
a second flexible substrate;
a light-emitting element between the first flexible substrate and the second flexible substrate;
a first bonding layer between the second flexible substrate and the light-emitting element; and
a second bonding layer surrounding the first bonding layer,
wherein the light-emitting element comprises a layer containing a light-emitting organic compound between a pair of electrodes,
wherein the second bonding layer has a higher gas barrier property than the first bonding layer,
wherein the first bonding layer has a higher refractive index than the second bonding layer, and
wherein the first bonding layer has a higher light-transmitting property than the second bonding layer.
9. The light-emitting device according to claim 8 , wherein the second bonding layer has a frame shape.
10. The light-emitting device according to claim 8 , wherein a permeation amount of water vapor of the second bonding layer is lower than or equal to 1×10 −8 [g/m 2 ·day].
11. The light-emitting device according to claim 8 , further comprising:
a transistor between the first flexible substrate and the light-emitting element; and
an adhesive layer between the first flexible substrate and the transistor.
12. The light-emitting device according to claim 8 , further comprising:
a first insulating layer between the first flexible substrate and the light-emitting element;
a transistor between the first insulating layer and the light-emitting element;
a coloring layer between the light-emitting element and the second flexible substrate; and
a second insulating layer between the coloring layer and the second flexible substrate.
13. An electronic device comprising the light-emitting device according to claim 8 .
14. A lighting device comprising the light-emitting device according to claim 8 .
15. The light-emitting device according to claim 1 , wherein a thickness of the first bonding layer is different from a thickness of the second bonding layer.
16. The light-emitting device according to claim 8 , wherein a thickness of the first bonding layer is different from a thickness of the second bonding layer.
17. The light-emitting device according to claim 1 , further comprising:
a first insulating layer and a second insulating layer between the first flexible substrate and the second flexible substrate; and
a light emitting portion and a first portion;
wherein the first portion is located outside the light emitting portion, and
wherein a shortest distance between a part of the first insulating layer and a part of the second insulating layer overlapping with the light emitting portion and a shortest distance between a part of the first insulating layer and a part of the second insulating layer overlapping with the first portion are different from each other.
18. The light-emitting device according to claim 8 , further comprising:
a first insulating layer and a second insulating layer between the first flexible substrate and the second flexible substrate; and
a light emitting portion and a first portion;
wherein the first portion is located outside the light emitting portion, and
wherein a shortest distance between a part of the first insulating layer and a part of the second insulating layer overlapping with the light emitting portion and a shortest distance between a part of the first insulating layer and a part of the second insulating layer overlapping with the first portion are different from each other.