Transparent conductive thin film electrodes, electronic devices and methods of producing the same

Patent metadata

Field	Value
Publication number	US-2015279498-A1
Application number	US-201514617459-A
Country	US
Kind code	A1
Filing date	Feb 9, 2015
Priority date	Mar 27, 2014
Publication date	Oct 1, 2015
Grant date	—

Abstract

A transparent electrodes having a conductive thin film, an electronic devices including the same, and methods of producing the same, include a first metal layer and a second metal layer on the first metal layer, wherein a surface energy of the first metal layer is higher than a surface energy of the second metal layer.

First claim

What is claimed is:

1 . A transparent electrode, comprising:
a first metal layer and a second metal layer on the first metal layer, wherein a surface energy of the first metal layer is higher than a surface energy of the second metal layer.

2 . The transparent electrode of claim 1 , wherein the first metal layer is on a transparent substrate including at least one selected from the group consisting of an inorganic oxide, quartz, a polymer, a semiconductor material, a crystalline material, an organic-inorganic hybrid material, and a combination thereof.

3 . The transparent electrode of claim 1 , wherein the transparent electrode further includes a transparent metal oxide layer, a transparent conductive polymer layer, or a transparent conductive carbon material layer, and
the transparent oxide layer, the transparent conductive polymer layer, or the transparent conductive carbon material layer is on the second metal layer.

4 . The transparent electrode of claim 1 , wherein the first metal layer includes a metal having a surface energy of greater than, or equal to, about 1300 mJ/cm 2 at a temperature of about 0° C.

5 . The transparent electrode of claim 1 , wherein the first metal layer includes at least one selected from the group consisting of W, Mo, Cu, Au, Pd, and a combination thereof.

6 . The transparent electrode of claim 1 , wherein the first metal layer has a thickness of less than, or equal to, about 2 nm.

7 . The transparent electrode of claim 1 , wherein the second metal layer includes at least one selected from the group consisting of Ag, Cu, Au, Al, and a combination thereof.

8 . The transparent electrode of claim 1 , wherein the second metal layer has a thickness of less than, or equal to, about 10 nm.

9 . The transparent electrode of claim 3 , wherein the transparent metal oxide layer, the transparent conductive polymer layer, or the transparent conductive carbon material layer includes a material having a dielectric constant of greater than, or equal to, about 10.

10 . The transparent electrode of claim 3 , wherein the transparent metal oxide layer, the transparent conductive polymer layer, or the transparent conductive carbon material layer includes a material having a specific resistance of less than, or equal to, about 1×10 −2 Ω·cm.

11 . The transparent electrode of claim 3 , wherein the transparent metal oxide layer includes an oxide having a bandgap of greater than, or equal to, about 3.0 eV.

12 . The transparent electrode of claim 3 , wherein the transparent oxide layer includes at least one selected from the group consisting of an indium oxide, a Sn doped indium oxide, a zinc oxide, an Al doped ZnO, tin oxide doped with Ga, In, or Zn, Ga 2 O 3 , SiO 2 , Al 2 O 3 , GaN, AlN, MoO 3 , WO 3 , and a combination thereof;
the transparent conductive polymer layer includes at least one selected from the group consisting of polythiophene, polyaniline, polyparaphenylene, polypyrrole, polyacetylene, and a combination thereof; and the transparent conductive carbon material layer includes at least one selected from the group consisting of carbon nanotubes, graphene, a reduced graphene oxide, graphite, and a combination thereof.

13 . The transparent electrode of claim 3 , wherein the transparent oxide layer has a thickness of less than, or equal to, about 100 nm.

14 . A method of producing a transparent electrode including a first metal layer and a second metal layer on the first metal layer, wherein a surface energy of the first metal layer is higher than a surface energy of the at least one second metal layer, the method comprising:
obtaining a transparent substrate; forming the first metal layer on the transparent substrate; and forming the second metal layer on the first metal layer.

15 . The method of claim 14 , further comprising:
forming a transparent oxide layer, a transparent conductive polymer layer, or a transparent conductive carbon material layer on the second metal layer.

16 . The method of claim 15 , wherein the forming of the transparent oxide layer, the transparent conductive polymer layer, or the transparent conductive carbon material layer on the second metal layer is performed in a non-oxidative atmosphere.

17 . The method of claim 14 , wherein the first metal layer includes at least one selected from the group consisting of W, Mo, Cu, Au, Pd, and a combination thereof,
the second metal layer includes at least one selected from the group consisting of Ag, Cu, Au, Al, and a combination thereof, the first metal layer has a thickness of less than, or equal to, about 2 nm, and the second metal layer has a thickness of less than, or equal to, about 10 nm.

18 . An electronic device, comprising:
a transparent electrode according to claim 1 .

19 . The electronic device of claim 18 , wherein the electronic device is a flat panel display, a touch screen panel, a photovoltaic cell, an e-window, a heat mirror, or a transparent transistor.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Kwang Hee
• Park Hyeon Cheol
• Kwak Chan
• Son Yoon Chul
• Lee Sang Mock

Classifications

• H10F71/138

  Manufacture of transparent electrodes, e.g. transparent conductive oxides [TCO] or indium tin oxide [ITO] electrodes · CPC title

• H01B1/02 Primary

  mainly consisting of metals or alloys · CPC title

• H01B1/128

  comprising six-membered aromatic rings in the main chain, e.g. polyanilines, polyphenylenes · CPC title

• H01B1/08

  oxides · CPC title

• H01B1/125

  comprising aliphatic main chains, e.g. polyactylenes · CPC title