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-9917274-B2
Application number	US-201615351748-A
Country	US
Kind code	B2
Filing date	Nov 15, 2016
Priority date	Jun 24, 2011
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

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 substrate;
at least two light-emitting elements adjacent to each other over the substrate;
at least two first electrodes adjacent to each other over the substrate;
a partition over the substrate, between the at least two light-emitting elements and between the at least two first electrodes, a side surface of the partition forming an angle of greater than or equal to 55° and less than or equal to 100° with the substrate;
a layer containing a light-emitting compound over the at least two first electrodes and the partition; and
a second electrode over the layer containing the light-emitting compound, the second electrode overlapping the at least two first electrodes,
wherein the at least two light-emitting elements comprise each the second electrode, the layer containing the light-emitting compound, and a corresponding one of the at least two first electrodes,
wherein 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 the thickness A 0 ,
wherein the second electrode includes a portion of a thickness B 0 over the 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 ,
wherein 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.

2. 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 the substrate.

3. The light-emitting panel according to claim 1 ,
wherein B 1 is greater than B 0 .

4. The light-emitting panel according to claim 1 , 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.

5. The light-emitting panel according to claim 1 ,
wherein the layer containing the light-emitting compound is formed by a deposition method having directivity.

6. The light-emitting panel according to claim 5 ,
wherein the deposition method has directivity in a direction vertical to the at least two first electrodes.

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

8. A light-emitting panel comprising:
a substrate;
at least two light-emitting elements adjacent to each other over the substrate;
at least two first electrodes adjacent to each other over the substrate;
a partition over the substrate, between the at least two light-emitting elements and between the at least two first electrodes, a side surface of the partition forming an angle of greater than or equal to 55° and less than or equal to 100° with the substrate;
a layer containing a light-emitting compound over the at least two first electrodes and the partition; and
a second electrode over the layer containing the light-emitting compound, the second electrode overlapping the at least two first electrodes,
wherein the at least two light-emitting elements comprise each the second electrode, the layer containing the light-emitting compound, and a corresponding one of the at least two first electrodes,
wherein 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 second electrode includes a portion of a thickness B 0 over the 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 ,
wherein 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.

9. The light-emitting panel according to claim 8 ,
wherein the side surface forms an angle of greater than or equal to 55° and less than or equal to 90° with the substrate.

10. The light-emitting panel according to claim 8 ,
wherein B 1 is greater than B 0 .

11. The light-emitting panel according to claim 8 , 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.

12. The light-emitting panel according to claim 8 ,
wherein the layer containing the light-emitting compound is formed by a deposition method having directivity.

13. The light-emitting panel according to claim 12 ,
wherein the deposition method has directivity in a direction vertical to the at least two first electrodes.

14. A light-emitting device comprising the light-emitting panel according to claim 8 .

15. A display device comprising:
a substrate;
a driver circuit portion over the substrate;
a pixel portion;
at least two light-emitting elements adjacent to each other over the substrate, in the pixel portion, and configured to be controlled by the driver circuit portion;
at least two first electrodes adjacent to each other over the substrate;
a partition over the substrate, between the at least two light-emitting elements and between the at least two first electrodes, a side surface of the partition forming an angle of greater than or equal to 55° and less than or equal to 100° with the substrate;
a layer containing a light-emitting compound over the at least two first electrodes and the partition; and
a second electrode over the layer containing the light-emitting compound, the second electrode overlapping the at least two first electrodes,
wherein the at least two light-emitting elements comprise each the second electrode, the layer containing the light-emitting compound, and a corresponding one of the at least two first electrodes,
wherein 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 second electrode includes a portion of a thickness B 0 over the 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 ,
wherein 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.

16. The light-emitting panel according to claim 15 ,
wherein the side surface forms an angle of greater than or equal to 55° and less than or equal to 90° with the substrate.

17. The light-emitting panel according to claim 15 ,
wherein B 1 is greater than B 0 .

18. The light-emitting panel according to claim 15 , 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.

19. The light-emitting panel according to claim 15 ,
wherein the layer containing the light-emitting compound is formed by a deposition method having directivi

Assignees

• Semiconductor Energy Lab

Inventors

• Ohnuma Hideto
• Miyairi Noriko
• Senda Naoyuki

Classifications

• H01L51/0052

  Electricity · mapped topic

• H01L27/326

  Electricity · mapped topic

• H01L51/5203

  Electricity · mapped topic

• H01L51/5206 Primary

  Electricity · mapped topic

• H01L51/0074

  Electricity · mapped topic