Light-emitting device and lighting device
View Patent ↗To provide a light-emitting device including the plurality of light-emitting elements having a structure in which a light-emitting area is large and defects in patterning of light-emitting elements are suppressed. To provide a lighting device including the light-emitting device. The light-emitting device includes a first wiring provided over a substrate having an insulating surface, an insulating film provided over the first wiring, a second wiring provided over the insulating film, and a light-emitting element unit including a plurality of light-emitting elements provided over the first wiring with the insulating film provided therebetween. The plurality of light-emitting elements each include a first electrode layer having a light-blocking property, a layer containing an organic compound in contact with the first electrode layer, and a second electrode layer having a light-transmitting property in contact with the layer containing an organic compound. The layers containing an organic compound are separated by a separation layer.
1. A light-emitting device comprising:
a substrate;
a first wiring over the substrate;
an insulating film over the first wiring;
a second wiring over the insulating film; and
a first light-emitting element, a second light-emitting element, and a third light-emitting element over the insulating film, each of the first to third light-emitting elements comprising:
a first electrode having a light-blocking property;
a layer containing an organic compound on the first electrode; and
a second electrode having a light-transmitting property on the layer containing an organic compound,
wherein the layers containing an organic compound of the first and second light-emitting elements are separated from each other by a separation layer,
wherein the second electrodes of the first and second light-emitting elements are separated from each other by the separation layer,
wherein the first electrode of the first light-emitting element is directly in contact with the first wiring,
wherein the second electrode of the first light-emitting element extends beyond an edge portion of the layer containing an organic compound of the first light-emitting element and is directly in contact with the first electrode of the second light-emitting element,
wherein the second electrode of the third light-emitting element extends beyond an edge portion of the layer containing an organic compound of the third light-emitting element and is directly in contact with the second wiring, and
wherein the first light-emitting element, the second light-emitting element, and the third light-emitting element are electrically connected to each other in series.
2. The light-emitting device according to claim 1 , further comprising a fourth light-emitting element, a fifth light-emitting element, and a sixth light-emitting element over the insulating film,
wherein the fourth light-emitting element, the fifth light-emitting element, and the sixth light-emitting element are electrically connected to each other in series.
3. The light-emitting device according to claim 2 ,
wherein a first light-emitting element row comprising the first light-emitting element, the second light-emitting element, and the third light-emitting element and a second light-emitting element row comprising the fourth light-emitting element, the fifth light-emitting element, and the sixth light-emitting element are electrically connected to each other in parallel.
4. The light-emitting device according to claim 1 , wherein a cross section of the separation layer has a shape in which a side in contact with a surface where the separation layer is formed is shorter than the opposite side.
5. The light-emitting device according to claim 1 , wherein the substrate is made of organic resin or metal.
6. The light-emitting device according to claim 1 , wherein the first wiring and the second wiring are formed of a conductive paste.
7. The light-emitting device according to claim 1 , wherein light emitted from the first light-emitting element is extracted through the second electrode of the first light-emitting element.
8. A lighting device comprising the light-emitting device according to claim 1 .
9. A light-emitting device comprising:
a substrate;
a first wiring over the substrate;
an insulating film over the first wiring;
a second wiring over the insulating film; and
a first light-emitting element, a second light-emitting element, and a third light-emitting element over the insulating film, each of the first to third light-emitting elements comprising:
a first electrode;
a layer containing an organic compound on the first electrode; and
a second electrode on the layer containing an organic compound,
wherein the layers containing an organic compound of the first and second light-emitting elements are separated from each other by a separation layer,
wherein the second electrodes of the first and second light-emitting elements are separated from each other by the separation layer,
wherein the first electrode of the first light-emitting element is directly in contact with the first wiring,
wherein the second electrode of the first light-emitting element extends beyond an edge portion of the layer containing an organic compound of the first light-emitting element and is directly in contact with the first electrode of the second light-emitting element,
wherein the second electrode of the third light-emitting element extends beyond an edge portion of the layer containing an organic compound of the third light-emitting element and is directly in contact with the second wiring, and
wherein the first light-emitting element, the second light-emitting element, and the third light-emitting element are electrically connected to each other in series.
10. The light-emitting device according to claim 9 , further comprising a fourth light-emitting element, a fifth light-emitting element, and a sixth light-emitting element over the insulating film,
wherein the fourth light-emitting element, the fifth light-emitting element, and the sixth light-emitting element are electrically connected to each other in series.
11. The light-emitting device according to claim 10 ,
wherein a first light-emitting element row comprising the first light-emitting element, the second light-emitting element, and the third light-emitting element and a second light-emitting element row comprising the fourth light-emitting element, the fifth light-emitting element, and the sixth light-emitting element are electrically connected to each other in parallel.
12. The light-emitting device according to claim 9 , wherein a cross section of the separation layer has a shape in which a side in contact with a surface where the separation layer is formed is shorter than the opposite side.
13. The light-emitting device according to claim 9 , wherein the substrate is made of organic resin or metal.
14. The light-emitting device according to claim 9 , wherein the first wiring and the second wiring are formed of a conductive paste.
15. A lighting device comprising the light-emitting device according to claim 9 .
16. A light-emitting device comprising:
a substrate;
a first wiring over the substrate;
an insulating film over the first wiring;
a second wiring over the insulating film; and
a first plurality of light-emitting elements comprising a first light-emitting element, a second light-emitting element, and a third light-emitting element over the insulating film, each of the first light-emitting element, the second light-emitting element, and the third light-emitting element comprising:
a first electrode;
an EL layer over the first electrode; and
a second electrode over the EL layer,
wherein the EL layer of the first light-emitting element and the EL layer of the second light-emitting element are separated from each other by a separation layer,
wherein the second electrode of the first light-emitting element and the second electrode of the second light-emitting element are separated from each other by the separation layer,
wherein the first electrode of the first light-emitting element is in contact with the first wiring,
wherein the second electrode of the first light-emitting element extends beyond an edge portion of the EL layer of the first light-emitting element,
wherein the second electrode of the first light-emitting element is in contact with the first electrode of the second light-emitting element,
wherein the second electrode of the third light-emitting element extends beyond an edge portion of the EL layer of the third light-emitting element,
wherein the second electrode of the third light-emitting element is in contact with the second wiring, and
wherein the first light-emitting element, the second light-emitting element, and the third light-emitting element are electrically connected to each other in series.
17. The light-emitting device according to claim 16 , further comprising a second plurality of light-emitting elements comprising a fourth light-emitting element, a fifth light-emitting element, and a sixth light-emitting element over the insulating film,
wherein the fourth light-emitting element, the fifth light-emitting element, and the sixth light-emitting element are electrically connected to each other in series.
18. The light-emitting device according to claim 17 , wherein the first plurality of light-emitting elements and the second plurality of light-emitting elements are electrically connected to each other in parallel.
19. The light-emitting device according to claim 16 , wherein a cross section of the separation layer has a shape in which a side in contact with a surface where the separation layer is formed is shorter than the opposite side.
20. The light-emitting device according to claim 16 , wherein the substrate is made of organic resin or metal.
21. The light-emitting device according to claim 16 , wherein the first wiring and the second wiring are formed of a conductive paste.
22. A lighting device comprising the light-emitting device according to claim 16 .