Light-emitting panel, light-emitting device using the light-emitting panel, and method for manufacturing the light-emitting panel

Patent metadata

Field	Value
Publication number	US-9502676-B2
Application number	US-201514858282-A
Country	US
Kind code	B2
Filing date	Sep 18, 2015
Priority date	Jun 24, 2011
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

To provide a light-emitting panel in which the occurrence of crosstalk is suppressed. To provide a method for manufacturing a light-emitting panel in which the occurrence of crosstalk is suppressed. The light-emitting panel includes a first electrode of one light-emitting element, a first electrode of the other light-emitting element, and an insulating partition which separates the two first electrodes. A portion with a thickness A 1 smaller than a thickness A 0 of a portion of the layer containing a light-emitting organic compound, which overlaps with a side surface of the partition, is included. The ratio (B 1 /B 0 ) of a thickness B 1 of a portion of the second electrode, which overlaps with a side surface of the partition, to a thickness B 0 of a portion of the second electrode, which overlaps with the first electrode, is higher than the ratio (A 1 /A 0 ).

First claim

What is claimed is:

1. A light-emitting panel comprising:
a first electrode over a substrate;
an insulating layer covering partially a top surface of the first electrode;
a layer containing a light-emitting compound covering the first electrode and the insulating layer; and
a second electrode covering the layer containing the light-emitting compound,
wherein the layer containing the light-emitting compound includes a portion of a thickness A 0 covering the first electrode and a portion of a thickness A 1 covering a side surface of the insulating layer, the thickness A 1 being smaller than the thickness A 0 ,
wherein the second electrode includes a portion of a thickness B 0 covering the first electrode with the layer containing the light-emitting compound interposed therebetween, and a portion of a thickness B 1 covering the side surface of the insulating layer with the layer containing the light-emitting compound interposed therebetween, a ratio B 1 /B 0 being higher than a ratio A 1 /A 0 , and
wherein a portion of the layer containing the light-emitting compound covering a top surface of the insulating layer is thicker than the portion of the thickness A 1 covering the side surface of the insulating layer.

2. The light-emitting panel according to claim 1 ,
wherein the thickness Al is smaller than half of the thickness A 0 .

3. The light-emitting panel according to claim 1 ,
wherein the insulating layer covers partially a top surface of another first electrode that is in a same plane as the first electrode, and
wherein the layer containing a light-emitting compound covers other first electrode and is formed continuously between the first electrode and the other first electrode.

4. The light-emitting panel according to claim 1 ,
wherein the insulating layer is a partition.

5. The light-emitting panel according to claim 1 ,
wherein the thickness A 1 is smaller than half of the thickness A 0 .

6. The light-emitting panel according to claim 1 ,
wherein the side surface forms an angle of greater than or equal to 55° and less than or equal to 90° with to the substrate.

7. The light-emitting panel according to claim 1 ,
wherein the side surface forms an angle of greater than or equal to 90° and less than or equal to 100° with the substrate.

8. The light-emitting panel according to claim 1 , further comprising a spacer formed over the insulating layer,
wherein the spacer is covered with the layer containing the light-emitting compound and the second electrode.

9. A light-emitting device comprising the light-emitting panel according to claim 1 .

10. A light-emitting panel comprising:
at least two first electrodes adjacent to each other over a substrate;
a partition formed between the at least two first electrodes and covering partially top surfaces of the at least two first electrodes;
a layer containing a light-emitting compound covering the at least two first electrodes and the partition, and formed continuously between the at least two first electrodes; and
a second electrode covering the layer containing the light-emitting compound, the second electrode overlapping with the at least two first electrodes and the partition,
wherein the layer containing the light-emitting compound includes a portion of a thickness A 0 covering one of the at least two first electrodes, and a portion of a thickness A 1 covering a side surface of the partition, the thickness A 1 being smaller than half of the thickness A 0 ,
wherein the second electrode includes a portion of a thickness B 0 covering one of the at least two first electrodes with the layer containing the light-emitting compound interposed therebetween, and a portion of a thickness B 1 covering the side surface of the partition with the layer containing the light-emitting compound interposed therebetween, a ratio B 1 /B 0 being higher than a ratio A l /A 0 , and
wherein a portion of the layer containing the light-emitting compound covering a top surface of the partition is thicker than the portion of the thickness A 1 covering the side surface of the partition.

11. The light-emitting panel according to claim 10 ,
wherein the at least two first electrodes are respectively part of a first light-emitting element and a second light-emitting element, each of the first and the second light-emitting elements comprising the layer containing the light-emitting compound and the second electrode.

12. The light-emitting panel according to claim 10 ,
wherein the side surface forms an angle of greater than or equal to 55° and less than or equal to 90° with to the substrate.

13. The light-emitting panel according to claim 1 ,
wherein the side surface forms an angle of greater than or equal to 90° and less than or equal to 100° with the substrate.

14. The light-emitting panel according to claim 10 , further comprising a spacer formed over the partition,
wherein the spacer is covered with the layer containing the light-emitting compound and the second electrode.

15. A light-emitting device comprising the light-emitting panel according to claim 10 .

16. A method for manufacturing a light-emitting panel comprising:
forming at least two first electrodes adjacent to each other over a substrate;
forming a partition between the at least two first electrodes, the partition covering partially top surfaces of the at least two first electrodes;

forming a layer containing a light-emitting compound by a first deposition method, the first deposition method having directivity in a direction vertical to the substrate,
forming a second electrode by a second deposition method, the second deposition method having less directivity than the first deposition method,
wherein the first deposition method is such that the layer containing the light-emitting compound includes a portion of a thickness A 0 over one of the at least two first electrodes, and a portion of a thickness A 1 over a side surface of the partition, the thickness A 1 being smaller than half of the thickness A 0 ,
wherein the first deposition method is such that a portion of the layer containing the light-emitting compound overlapping with a top surface of the partition is thicker than the portion of the thickness A 1 over the side surface of the partition, and

wherein the second deposition method is such that the second electrode includes a portion of a thickness B 0 over one of the at least two first electrodes, and a portion of a thickness B 1 over the side surface of the partition, a ratio B 1 /B 0 being higher than a ratio A 1 /A 0 .

17. The method for manufacturing a light-emitting panel according to claim 16 ,
wherein the first deposition method is a resistance heating method and the second deposition method is a sputtering method.

18. The method for manufacturing a light-emitting panel according to claim 16 ,
wherein the side surface forms an angle of greater than or equal to 55° and less than or equal to 90° with the substrate.

19. The method for manufacturing a light-emitting panel according to claim 16 ,
wherein the side surface forms an angle of greater than or equal to 90° and less than or equal to 100° with the substrate.

Assignees

• Semiconductor Energy Lab

Inventors

• Ohnuma Hideto
• Miyairi Noriko
• Senda Naoyuki

Classifications

• H10K59/8052

  Cathodes · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K50/81

  Anodes · CPC title

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title

• H01L51/0085

  Electricity · mapped topic