Conductive film and display device comprising the same

Patent metadata

Field	Value
Publication number	US-11309515-B2
Application number	US-202016942152-A
Country	US
Kind code	B2
Filing date	Jul 29, 2020
Priority date	Nov 12, 2019
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

The present disclosure relates to a conductive film and a display device including the conductive film. More specifically, as the conductive film includes a conductive polymer layer and a plurality of metal nanowires and includes a network structure inserted in the conductive polymer layer, it is possible to provide the conductive film with high light transmittance and excellent electrical conductivity and the display device including the conductive film.

First claim

What is claimed is:

1. A conductive film, comprising:
a base layer;
a conductive polymer layer on the base layer and including a conductive polymer; and
a network structure positioned within the conductive polymer layer,
wherein the network structure includes a plurality of metal nanowires,
wherein the conductive polymer is a conjugated polymer of an anionic polymer and a cationic polymer, and
wherein the cationic polymer includes dextran sulfate.

2. The conductive film according to claim 1 , wherein the anionic polymer includes poly(3,4-ethylenedixoythiophene).

3. The conductive film according to claim 1 , wherein the conductive polymer has a conductivity of about 9000 S/cm (Siemens per centimeter) or more.

4. The conductive film according to claim 1 , wherein the conductive polymer has a light transmittance of about 85% or more.

5. The conductive film according to claim 1 , wherein the metal nanowires are silver nanowires.

6. The conductive film according to claim 1 , wherein the network structure includes a junction portion in which two adjacent metal nanowires of a plurality of metal nanowires overlap each other.

7. The conductive film according to claim 1 , wherein the network structure has a sheet resistance of 20Ω/□ (ohms per square) or less.

8. The conductive film according to claim 1 , wherein the network structure has a light transmittance of about 90% or more.

9. The conductive film according to claim 1 , wherein the conductive polymer is located in a pore between the plurality of metal nanowires forming the network structure.

10. A display device, comprising:
a conductive film,
the conductive film including:
a base layer;
a conductive polymer layer on the base layer and including a conductive polymer; and
a plurality of overlapping metallic structures included in the conductive polymer layer, wherein the metallic structures have width dimensions on the order of a nanometer,
wherein the conductive polymer is a conjugated polymer of an anionic polymer and a cationic polymer, and
wherein the cationic polymer includes dextran sulfate.

11. The display device according to claim 10 , wherein the display device further comprising an organic light emitting element,
wherein the organic light emitting element includes a first electrode, a light emitting layer, and a second electrode, and
wherein at least one of the first electrode and the second electrode include the conductive film.

12. The display device according to claim 10 , wherein the display device further comprising a touch panel including a plurality of touch electrodes, and
wherein at least one of the plurality of touch electrodes include the conductive film.

13. The display device according to claim 10 , wherein each of the metallic structures are discrete from each other.

14. The display device according to claim 13 , wherein at least one of the metallic structure overlaps with at least one other metallic structure in a majority of the area of network.

15. A conductive film, comprising:
a base layer;
a conductive polymer layer on the base layer and including a conductive polymer; and
a network structure positioned within the conductive polymer layer,
wherein the network structure includes a plurality of metal nanowires, and
wherein the conductive polymer has a conductivity of about 9000 S/cm (Siemens per centimeter) or more.

Assignees

• Lg Display Co Ltd

Inventors

• Park Jonghyun

Classifications

• H10K85/1135

  Polyethylene dioxythiophene [PEDOT]; Derivatives thereof · CPC title

• H10K71/60 Primary

  Forming conductive regions or layers, e.g. electrodes · CPC title

• H10K59/8051

  Anodes · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H01B5/14 Primary

  comprising conductive layers or films on insulating-supports · CPC title