Flexible light-emitting device
View Patent ↗It is an object to provide a flexible light-emitting device with long lifetime in a simple way and to provide an inexpensive electronic device with long lifetime using the flexible light-emitting device. A flexible light-emitting device is provided, which includes a substrate having flexibility and a light-transmitting property with respect to visible light; a first adhesive layer over the substrate; an insulating film containing nitrogen and silicon over the first adhesive layer; a light-emitting element including a first electrode, a second electrode facing the first electrode, and an EL layer between the first electrode and the second electrode; a second adhesive layer over the second electrode; and a metal substrate over the second adhesive layer, wherein the thickness of the metal substrate is 10 μm to 200 μm inclusive. Further, an electronic device using the flexible light-emitting device is provided.
1. A flexible light-emitting device, comprising:
a first substrate having flexibility and a light-transmitting property with respect to visible light;
a first adhesive layer provided over the first substrate;
an insulating film containing nitrogen and silicon provided over the first adhesive layer;
a light-emitting element comprising:
a first electrode provided over the insulating film;
a second electrode facing the first electrode; and
an EL layer provided between the first electrode and the second electrode;
a second adhesive layer provided over the second electrode; and
a second substrate provided over the second adhesive layer,
wherein the second substrate is a metal substrate, and
wherein a thickness of the second substrate is greater than or equal to 10 μm and less than or equal to 200 μm.
2. The flexible light-emitting device according to claim 1 , further comprising a film sealing layer provided between the second electrode and the second adhesive layer.
3. The flexible light-emitting device according to claim 1 ,
wherein the second substrate comprises at least one selected from the group consisting of stainless steel, aluminum, copper, nickel, and an aluminum alloy.
4. The flexible light-emitting device according to claim 1 ,
wherein the first adhesive layer comprises at least one selected from the group consisting of an epoxy resin, an acrylic resin, a silicone resin, and a phenol resin.
5. The flexible light-emitting device according to claim 1 ,
wherein the second adhesive layer comprises at least one selected from the group consisting of an epoxy resin, an acrylic resin, a silicone resin, and a phenol resin.
6. The flexible light-emitting device according to claim 1 , further comprising a resin layer provided over the second substrate.
7. The flexible light-emitting device according to claim 6 ,
wherein the resin layer comprises at least one selected from the group of an epoxy resin, an acrylic resin, a silicone resin, a phenol resin, a polyester resin, polypropylene, polyethylene, polycarbonate, polystyrene, polyamide, polyetherketone, a fluorine resin, and polyethylenenaphthalate.
8. The flexible light-emitting device according to claim 6 ,
wherein the resin layer includes a fibrous body.
9. The flexible light-emitting device according to claim 1 ,
wherein at least one of the first substrate, the first adhesive layer, and the second adhesive layer includes a fibrous body.
10. The flexible light-emitting device according to claim 1 , further comprising a film having low permeability provided between the first substrate and the first adhesive layer.
11. The flexible light-emitting device according to claim 10 , wherein the film having low permeability is a film containing silicon and nitrogen or a film containing aluminum and nitrogen.
12. The flexible light-emitting device according to claim 1 , further comprising a coat film provided over a surface of the first substrate, which is opposite to a surface facing the second substrate.
13. The flexible light-emitting device according to claim 12 , wherein the coat film has a light-transmitting property with respect to visible light and high hardness.
14. The flexible light-emitting device according to claim 12 , wherein the coat film is a conductive film having a light-transmitting property with respect to visible light.
15. An electronic device using the flexible light-emitting device according to claim 1 for a display portion.
16. A flexible light-emitting device, comprising:
a first substrate having flexibility and a light-transmitting property with respect to visible light;
a first adhesive layer provided over the first substrate;
an insulating film containing nitrogen and silicon provided over the first adhesive layer;
a thin film transistor formation layer comprising a thin film transistor provided over the insulating film;
a light-emitting element comprising:
a first electrode electrically connected to the thin film transistor;
a second electrode facing the first electrode; and
an EL layer provided between the first electrode and the second electrode;
a second adhesive layer provided over the second electrode; and
a second substrate provided over the second adhesive layer,
wherein the second substrate is a metal substrate, and
wherein a thickness of the second substrate is greater than or equal to 10 μm and less than or equal to 200 μm.
17. The flexible light-emitting device according to claim 16 , wherein an active layer of the thin film transistor formed in the thin film transistor formation layer comprises crystalline silicon.
18. The flexible light-emitting device according to claim 16 ,
wherein a pixel portion includes a plurality of the light-emitting elements,
wherein a driver circuit portion is provided outside the pixel portion, and
wherein the driver circuit portion includes a thin film transistor formed in the thin film transistor formation layer.
19. The flexible light-emitting device according to claim 16 , further comprising a film sealing layer provided between the second electrode and the second adhesive layer.
20. The flexible light-emitting device according to claim 16 ,
wherein the second substrate comprises at least one selected from the group consisting of stainless steel, aluminum, copper, nickel, and an aluminum alloy.
21. The flexible light-emitting device according to claim 16 ,
wherein the first adhesive layer comprises at least one selected from the group consisting of an epoxy resin, an acrylic resin, a silicone resin, and a phenol resin.
22. The flexible light-emitting device according to claim 16 ,
wherein the second adhesive layer comprises at least one selected from the group consisting of an epoxy resin, an acrylic resin, a silicone resin, and a phenol resin.
23. The flexible light-emitting device according to claim 16 , further comprising a resin layer provided over the second substrate.
24. The flexible light-emitting device according to claim 23 , wherein the resin layer comprises at least one selected from the group of an epoxy resin, an acrylic resin, a silicone resin, a phenol resin, a polyester resin, polypropylene, polyethylene, polycarbonate, polystyrene, polyamide, polyetherketone, a fluorine resin, and polyethylenenaphthalate.
25. The flexible light-emitting device according to claim 23 ,
wherein the resin layer includes a fibrous body.
26. The flexible light-emitting device according to claim 16 ,
wherein at least one of the first substrate, the first adhesive layer, and the second adhesive layer includes a fibrous body.
27. The flexible light-emitting device according to claim 16 , further comprising a film having low permeability provided between the first substrate and the first adhesive layer.
28. The flexibe light-emitting device according to claim 27 , wherein the film having low permeability is a film containing silicon and nitrogen or a film containing aluminum and nitrogen.
29. The flexible light-emitting device according to claim 16 , further comprising a coat film provided over a surface of the first substrate, which is opposite to a surface facing the second substrate.
30. The flexible light-emitting device according to claim 29 , wherein the coat film has a light-transmitting property with respect to visible light and high hardness.
31. The flexible light-emitting device according to claim 29 , wherein the coat film is a conductive film having a light-transmitting property with respect to visible light.
32. An electronic device using the flexible light-emitting device according to claim 16 for a display portion.