Transparent electrode and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9826636-B2
Application number	US-201614989412-A
Country	US
Kind code	B2
Filing date	Jan 6, 2016
Priority date	Jan 6, 2015
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

Disclosed is a transparent electrode including a transparent substrate 100 , conductive nanowires 10 forming networks, nanoparticles bonding the nanowires 10 , and a conductive layer embedded in the transparent substrate 100.

First claim

What is claimed is:

1. A transparent electrode, comprising:
a conductive layer; and
a transparent substrate,
wherein the conductive layer comprises:
conductive nanowires forming networks, and
nanoparticles binding the conductive nanowires to one another,
wherein the conductive nanowires are silver (Ag) nanowires and the nanoparticles are porous nanoparticles attached to junctions of the networks and bonding the Ag nanowires to one another, and
wherein the conductive layer is formed as a composite mesh including the silver (Ag) nanowires and the porous nanoparticles and embedded in the transparent substrate.

2. The transparent electrode according to claim 1 , wherein the nanoparticles mediate transfer from a release substrate to the transparent substrate based on strong attraction to the conductive nanowires.

3. The transparent electrode according to claim 1 , wherein the transparent substrate has an optical transmittance of about 80 to about 95%.

4. The transparent electrode according to claim 1 , wherein a concentration ratio of the Ag nanowires to the porous nanoparticles is about 0.8 to about 1.2% by weight.

5. The transparent electrode according to claim 4 , wherein silver (Ag) atoms of the silver (Ag) nanowires are dispersed inside pores of the porous nanoparticles to form conductive channels.

6. The transparent electrode according to claim 1 , wherein the nanoparticles are aerogel.

7. An electronic device, comprising:
a transparent electrode that comprises a transparent substrate and a conductive layer comprising conductive nanowires forming networks and nanoparticles, wherein the conductive nanowires are silver (Ag) nanowires and the nanoparticies are porous nanoparticies attached to junctions of the networks and bonding the Ag nanowires to one another, and
wherein the conductive layer is formed as a composite mesh including the silver (Ag) nanowires and the porous nanoparticles binding the Ag nanowires to one another and is embedded in the transparent substrate.

8. The electronic device according to claim 7 , wherein the nanoparticles mediate transfer from a release substrate to the transparent substrate based on strong attraction to the conductive nanowires.

9. The electronic device according to claim 7 , wherein
a concentration ratio of the Ag nanowires to the porous nanoparticles is about 0.8 to about 1.2% by weight.

10. The electronic device according to claim 7 , wherein the nanoparticles are aerogel.

11. The electronic device according to claim 7 , wherein the electronic device is any one of a flexible display, an organic solar cell, an organic light-emitting diode, a touch panel, and a thin film heater.

12. A method of manufacturing a transparent electrode, the method comprising:
mixing conductive nanowires forming networks and nanoparticles binding the nanowires to prepare a dispersion, wherein the conductive nanowires are silver (Ag) nanowires and the nanoparticles are porous nanoparticles attached to junctions of the networks and bonding the Ag nanowires to one another;
coating the dispersion on a release substrate to form a conductive layer;
coating the conductive layer with a polymer for embedding;
hardening the polymer to form a transparent substrate in which the conductive layer is embedded; and
removing the release substrate from the transparent substrate and the conductive layer,
wherein the conductive layer is formed as a composite mesh including the silver (Ag) nanowires and the porous nanoparticles.

13. The method according to claim 12 , wherein, in the coating the dispersion, the dispersion is coated on the release substrate and then a solvent is evaporated through heat treatment.

14. The method according to claim 12 , wherein the release substrate is any one of a silicon substrate and a glass substrate.

Assignees

• Industry-Academic Cooperation Foundation Yonsei Univ

Inventors

• Park Jin Woo

Classifications

• H05K3/207

  using a prefabricated paste pattern, ink pattern or powder pattern · CPC title

• H05K2201/0108

  Transparent · CPC title

• H05K2201/0376

  Flush conductors, i.e. flush with the surface of the printed circuit · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• H05K1/0274

  Optical details, e.g. printed circuits comprising integral optical means (H05K1/0269 takes precedence; coupling light guides with opto-electronic components G02B6/42) · CPC title