Light emitting device, method of manufacturing the light emitting device, and display unit
View Patent ↗A light emitting device having a stacked structure is provided. The stacked structure includes, in recited order: a first electrode layer; an organic layer including a light emitting layer; a second electrode layer; a consecutive conductive sealing layer; and a third electrode layer.
1. A light emitting device having a stacked structure, the stacked structure comprising, in recited order:
a first electrode layer;
an organic layer including a light emitting layer;
a second electrode layer;
a conductive sealing layer; and
a third electrode layer,
wherein the conductive sealing layer is a continuous layer without an opening adjacent to the light emitting device.
2. The light emitting device according to claim 1 , wherein the conductive sealing layer contains a plurality of conductive nanoparticles dispersed in a transparent resin.
3. The light emitting device according to claim 2 , wherein the transparent resin is one of a thermosetting adhesive and an ultraviolet curable adhesive, and
the conductive nanoparticles each include one or more of gold (Au), silver (Ag), Ag nano-wire, copper (Cu), aluminum (Al), platinum (Pt), and indium tin oxide (ITO).
4. The light emitting device according to claim 1 , wherein the conductive sealing layer includes a plurality of conductive fillers dispersed in a transparent resin.
5. The light emitting device according to claim 4 , wherein the transparent resin includes one of a thermosetting adhesive and an ultraviolet curable adhesive, and
the conductive fillers are each configured of a transparent polymer material covered with a transparent conductive film.
6. The light emitting device according to claim 1 , further comprising a high resistance layer provided on the organic layer, the high resistance layer is further inserted between the organic layer and the second electrode layer.
7. The light emitting device according to claim 6 , wherein the high resistance layer has a higher electric resistance than each of the first electrode layer and the second electrode layer.
8. The light emitting device according to claim 6 , wherein the high resistance layer is configured to have at least one of electron transport function and electron injection function.
9. The light emitting device according to claim 1 , wherein the second electrode layer is low in flatness.
10. The light emitting device according to claim 9 , wherein the third electrode layer is high in flatness.
11. The light emitting device according to claim 1 , wherein the conductive sealing layer is configured to transmit 80% or more of light from the light emitting device.
12. The light emitting device according to claim 1 , wherein the conductive sealing layer is configured to electrically connect the second electrode layer to the third electrode layer.
13. A display unit, comprising:
a plurality of light emitting devices on a substrate,
each of the plurality of light emitting devices having a stacked structure, the stacked structure including, in recited order,
a first electrode layer,
an organic layer including a light emitting layer,
a second electrode layer,
a conductive sealing layer, and
a third electrode layer,
wherein the conductive sealing layer is a continuous layer without an opening adjacent to the light emitting device.
14. The display unit according to claim 13 , wherein the second electrode layer, the conductive sealing layer, and the third electrode layer are each a common layer shared by the plurality of light emitting devices.
15. The display unit according to claim 14 , further comprising:
a separation region allowing the light emitting layer to be separately provided for the individual light emitting devices; and
a light emitting region occupied by the light emitting layer,
wherein the separation region is provided with an auxiliary wiring layer connected to the third electrode layer.
16. The display unit according to claim 13 , further comprising a high resistance layer provided on the organic layer, the high resistance layer is further inserted between the organic layer and the second electrode layer.
17. The display unit according to claim 13 , wherein the second electrode layer is low in flatness.
18. The display unit according to claim 17 , wherein the third electrode layer is high in flatness.
19. A method of manufacturing a light emitting device, the method comprising:
forming a stack of a first electrode layer, an organic layer including a light emitting layer, and a second electrode layer in this order on a first substrate;
forming a third electrode layer on a second substrate; and
bonding the second electrode layer to the third electrode layer with a conductive sealing layer therebetween,
wherein the conductive sealing layer is a continuous layer without an opening adjacent to the light emitting device.
20. The method according to claim 19 , wherein a transparent resin including one of a thermosetting adhesive and an ultraviolet curable adhesive, in which a plurality of conductive nanoparticles or a plurality of conductive fillers are dispersed, is cured by heating or irradiation of ultraviolet rays to produce the conductive sealing layer.
21. The method according to claim 19 , further comprising a step of forming a high resistance layer on the organic layer, the high resistance layer is further inserted between the organic layer and the second electrode layer.
22. The method according to claim 19 , wherein the second electrode layer is low in flatness.
23. The method according to claim 22 , wherein the third electrode layer is high in flatness.