Organic light-emitting device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-10734597-B2
Application number	US-201816225394-A
Country	US
Kind code	B2
Filing date	Dec 19, 2018
Priority date	May 31, 2016
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

Disclosed are an organic light-emitting device and a method of manufacturing the same. In the organic light-emitting device, an auxiliary electrode is formed on anode electrode to come into contact with the anode electrode via the same mask process as the anode electrode, which results in a simplified structure and simplified processing. In addition, a bank is disposed to cover a side surface and an upper surface of the auxiliary electrode and a side surface of the anode electrode, whereby damage to the auxiliary electrode and the anode electrode is prevented.

First claim

What is claimed is:

1. An organic light-emitting device comprising:
a substrate;
a first electrode on the substrate, the first electrode having a first portion and a second portion different from the first portion, the first portion of the first electrode extending in a first direction of the substrate and extending in a second direction transverse to the first direction to form a lattice shape;
a light-emitting layer on the first electrode;
a second electrode on the light-emitting layer;
an auxiliary electrode connected to and on the first portion of the first electrode; and
a bank overlapping the auxiliary electrode and forming an emission area on the substrate.

2. The device according to claim 1 , wherein the second portion of the first electrode includes:
an emitting portion in the emission area of the light-emitting layer; and
an auxiliary portion between the first, portion and the emitting portion.

3. The device according to claim 2 , wherein the bank is further disposed on the auxiliary portion of the first electrode.

4. The device according to claim 3 , wherein the bank covers a side surface and an upper surface of the auxiliary portion of the first electrode, and the bank covers a side surface of the emitting portion the first electrode.

5. The device according to claim 4 , further comprising:
a light extraction layer between the bank and the substrate or on a back surface of the substrate.

6. The device according to claim 5 , wherein the light extraction layer serves to increase light extraction efficiency.

7. The device according to claim 6 , wherein the light extraction layer includes a plurality of scattered particles in a binder.

8. The device according to claim 2 , wherein the auxiliary portion of the first electrode has a smaller line width than at least one of the first portion and the emitting portion.

9. The device according to claim 8 , wherein the auxiliary portion of the first electrode surrounds at least one of the first portion and the emitting portion.

10. The device according to claim 2 , wherein the bank overlaps an upper surface and a side surface of each of the first portion and the auxiliary portion, and the bank covers a side surface of the emitting portion.

11. The device according to claim 1 , wherein the bank has a lattice form corresponding to the first portion of the auxiliary electrode.

12. The device according to claim 1 , wherein the light-emitting layer is disposed on a part of the bank on the first electrode.

13. The device according to claim 1 , further comprising:
an encapsulation layer on the bank.

14. The device according to claim 1 , wherein the auxiliary electrode connected to the first electrode has a side surface that is aligned with a side surface of the first electrode.

15. The device according to claim 1 , further comprising:
one or more pads configured to supply a drive signal from an integrated drive circuit to the first electrode or the second electrode on the substrate.

16. The device according to claim 15 , wherein the one or more pads includes:
a first pad electrode on the substrate;
a second pad electrode on the first pad electrode; and
a pad protective layer on the second pad electrode.

17. The device according to claim 16 , wherein one of the first pad electrode or the second pad electrode is formed in a single layer or in multiple layers.

18. The device according to claim 17 , wherein the pad protective layer is formed of a same material as the bank selected from one of an organic insulation material and inorganic insulation material.

19. The device according to claim 16 , wherein the pad protective layer partially overlaps with the first pad electrode and the second pad electrode.

20. The device according to claim 1 , wherein the first electrode is formed of a transparent conductive material and the auxiliary electrode is formed of a metal material having a higher conductivity than the first electrode.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Yong-Il

Classifications

• H10K59/873 Primary

  Encapsulations · CPC title

• H10K59/80516

  combined with auxiliary electrodes, e.g. ITO layer combined with metal lines · CPC title

• H10K50/814

  combined with auxiliary electrodes, e.g. ITO layer combined with metal lines · CPC title

• H10K59/173 Primary

  comprising banks or shadow masks · CPC title

• H10D86/0231

  using masks, e.g. half-tone masks · CPC title