Transparent electrodes and electronic devices including the same

Patent metadata

Field	Value
Publication number	US-11037696-B2
Application number	US-201615343541-A
Country	US
Kind code	B2
Filing date	Nov 4, 2016
Priority date	Nov 4, 2015
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A transparent electrode including: a first layer including a thermosetting copolymer including a first repeating unit having an aromatic moiety as a pendant group or incorporated in a backbone of the copolymer and a second repeating unit capable of lowering a curing temperature, a combination of a first polymer including the first repeating unit and a second polymer including the second repeating unit, or a combination thereof; a second layer disposed directly on one side of the first layer, wherein the second layer includes graphene; and a third layer disposed on the second layer, wherein the third layer includes an electrically conductive metal nanowire.

First claim

What is claimed is:

1. A transparent electrode comprising:
a first layer comprising a thermosetting copolymer represented by Chemical Formula 3; wherein the first layer has a first side and a second side opposite to the first side;
a second layer disposed directly on the first side of the first layer, wherein the second layer consists of graphene;
a third layer disposed on the second layer, wherein the third layer comprises an electrically conductive metal nanowire; and
a flexible substrate disposed directly on the second side of the first layer;

wherein in Chemical Formula 3,
R1 is a hydroxyl group,
R2 is hydrogen or a C1 to C3 alkyl,
R3 is —COOR 4 , wherein R 4 is a substituted or unsubstituted C1 to C10 alkyl group, and
x and y independently represent the number of respective repeating units.

2. The transparent electrode of claim 1 , wherein a thickness of the first layer is less than or equal to about 300 nanometers.

3. The transparent electrode of claim 2 , wherein a thickness of the first layer is about 50 nanometers to about 200 nanometers.

4. The transparent electrode of claim 1 , wherein the first layer further comprises a zinc-containing compound, a tin-containing compound, a gold-containing compound, an aryl amine, an arylimidazole, a curing agent, a nitric acid, or a combination thereof.

5. The transparent electrode of claim 1 , wherein the electrically conductive metal nanowire comprises silver, copper, gold, aluminum, cobalt, palladium, or a combination thereof.

6. The transparent electrode of claim 1 , wherein the electrically conductive metal nanowire has an average diameter of less than or equal to about 50 nanometers and an average length of greater than or equal to about 1 micrometer.

7. The transparent electrode of claim 1 , wherein the transparent electrode further comprises an overcoating layer disposed directly on the second layer,
wherein the overcoating layer comprises: the thermosetting copolymer, a combination of the first polymer and the second polymer, a urethane (meth)acrylate, a perfluoropolymer comprising a (meth)acrylate group, a poly(meth)acrylate comprising a (meth)acrylate group, an epoxy(meth)acrylate, or a combination thereof.

8. The transparent electrode of claim 1 , wherein the transparent electrode further comprises an overcoating layer comprising a polymer disposed on the third layer.

9. The transparent electrode of claim 8 , wherein the overcoating layer comprises the thermosetting copolymer, the combination of the first polymer and the second polymer, a urethane (meth)acrylate, a perfluoropolymer comprising a (meth)acrylate group, a poly(meth)acrylate comprising a (meth)acrylate group, an epoxy(meth)acrylate, or a combination thereof.

10. The transparent electrode of claim 1 , wherein the transparent electrode has light transmittance of greater than or equal to about 85% at a wavelength of 550 nanometers and sheet resistance of less than or equal to about 200 ohms per square.

11. An electronic device comprising the transparent electrode of claim 1 .

12. The electronic device of claim 11 , wherein the electronic device is a flat panel display, a touch screen panel, a solar cell, an e-window, an electrochromic mirror, a heat mirror, a transparent transistor, or a flexible display.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Park Hyeon Cheol
• Cho Youngjin
• Yang Daejin
• Kwak Chan
• Kim Kwanghee
• Shin Weonho
• Woo Yun Sung

Classifications

• H10D64/60

  Electrodes characterised by their materials · CPC title

• H10F77/244

  made of transparent conductive layers, e.g. transparent conductive oxide [TCO] layers · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• H01B1/22 Primary

  the conductive material comprising metals or alloys · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title