Light-emitting device, display device, and method for manufacturing the same
View Patent ↗It is known that a light-emitting element utilizing organic EL deteriorates due to moisture. Therefore, a sealing technique to prevent moisture permeation is important. A light-emitting device including a light-emitting element utilizing organic EL is manufactured over a support substrate having flexibility and a high heat dissipation property (e.g., stainless steel or duralumin), and the light-emitting device is sealed with a stack body having moisture impermeability and a high light-transmitting property or with glass having moisture impermeability and a high light-transmitting property and having a thickness greater than or equal to 20 μm and less than or equal to 100 μm.
1. A light-emitting device comprising:
a first substrate having flexibility;
a base insulating film over the first substrate;
first and second electrodes over the base insulating film;
a first partition wall covering an end portion of the first electrode and an end portion of the second electrode;
a second partition wall over the first electrode;
an organic EL layer over the first electrode, the first partition wall, and the second partition wall;
a third electrode covering the organic EL layer, the second electrode having a light-transmitting property in a visible light region;
a second substrate having a vapor permeability coefficient lower than or equal to 1×10 −7 g/(m 2 ·day); and
a sealant,
wherein the first substrate and the second substrate are bonded to each other with the sealant.
2. The light-emitting device according to claim 1 , wherein the first substrate comprises one of stainless steel and duralumin.
3. The light-emitting device according to claim 1 , wherein the second substrate is a glass substrate having a thickness greater than or equal to 20 μm and less than or equal to 100 μm.
4. The light-emitting device according to claim 1 , wherein the second substrate comprises a stacked body that includes one of a sheet having a gas barrier property and a resin, and a film including two or more materials selected from silicon oxide, silicon oxynitride, silicon nitride oxide, silicon nitride, aluminum oxide, aluminum oxynitride, aluminum nitride oxide, aluminum nitride, silicon carbide, diamond-like carbon, or a high molecular material, provided over the one of the sheet having the gas barrier property and the resin.
5. The light-emitting device according to claim 1 , wherein a space between the first substrate and the second substrate is filled with an organic compound having a light-transmitting property in a visible light region or an inorganic compound having a light-transmitting property in a visible light region.
6. The light-emitting device according to claim 1 , further comprising a structure with a lens shape over the second substrate, the structure including a resin.
7. A light-emitting device comprising:
a first substrate having flexibility;
a base insulating film over the first substrate;
first and second electrodes over the base insulating film;
a first partition wall over and in contact with an end portion of the first electrode and an end portion of the second electrode;
a second partition wall over the first electrode;
an organic EL layer over the first electrode, the first partition wall, and the second partition wall;
a third electrode over the organic EL layer, the third electrode having a light-transmitting property in a visible light region;
a second substrate over the third electrode, the second substrate having a vapor permeability coefficient lower than or equal to 1×10 −7 g/(m 2 ·day); and
a sealant between the first substrate and the second substrate.
8. The light-emitting device according to claim 7 , wherein the first substrate comprises one of stainless steel and duralumin.
9. The light-emitting device according to claim 7 , wherein the second substrate is a glass substrate having a thickness greater than or equal to 20 μm and less than or equal to 100 μm.
10. The light-emitting device according to claim 7 , wherein the second substrate comprises a stacked body that includes one of a sheet having a gas barrier property and a resin, and a film including two or more materials selected from silicon oxide, silicon oxynitride, silicon nitride oxide, silicon nitride, aluminum oxide, aluminum oxynitride, aluminum nitride oxide, aluminum nitride, silicon carbide, diamond-like carbon, or a high molecular material, provided over the one of the sheet having the gas barrier property and the resin.
11. The light-emitting device according to claim 7 , wherein a space between the first substrate and the second substrate is filled with an organic compound having a light-transmitting property in a visible light region or an inorganic compound having a light-transmitting property in a visible light region.
12. The light-emitting device according to claim 7 , further comprising a structure with a lens shape over the second substrate, the structure including a resin.