Core-shell nano particle for formation of transparent conductive film, and manufacturing method of transparent conductive film using the same

Patent metadata

Field	Value
Publication number	US-9761344-B2
Application number	US-201414416593-A
Country	US
Kind code	B2
Filing date	Jul 18, 2014
Priority date	Jul 19, 2013
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

Disclosed herein are a core-shell nano particle for formation of a transparent conductive film, a manufacturing method of the core-shell nano particle, and a manufacturing method of a transparent conductive film using the core-shell nano particle and, more particularly, a core-shell structured nano particle consisting of a core including indium or indium oxide and a shell including tin, a manufacturing method of the core-shell structured nano particle, and a manufacturing method of a transparent conductive film including (i) dispersing a core-shell structured nano particle into a solvent to manufacture a coating liquid, (ii) applying the coating liquid onto a substrate to form a coating layer, (iii) drying the coating layer, and (iv) performing an annealing process on the coating layer.

First claim

The invention claimed is:

1. A manufacturing method of a transparent conductive film using a core-shell structured nano particle, the manufacturing method comprising:
(i) dispersing core-shell structured nano particles with a core that includes indium and a shell that includes tin into a solvent to manufacture a coating liquid;
(ii) applying the coating liquid onto a substrate to form a coating layer;
(iii) drying the coating layer; and
(iv) sintering the nano particles by performing an annealing process on the coating layer at a pressure of at least atmospheric pressure in atmosphere,
wherein the annealing process is carried out using laser annealing, and
wherein a laser used for the laser annealing has a visible light wavelength.

2. The manufacturing method according to claim 1 , wherein the solvent comprises one or more solvents selected from a group consisting of water, alcohol, ether, ketone, glycol, glycerol, and terfenol.

3. The manufacturing method according to claim 1 , wherein the coating layer has a thickness of 0.2 micrometer to 2.0 micrometer.

4. The manufacturing method according to claim 1 , wherein the substrate is a plastic substrate or a glass substrate.

5. The manufacturing method according to claim 1 , wherein a laser used for the laser annealing is an Nd-Yag laser, a disc laser, or a fiber laser.

6. The manufacturing method according to claim 1 , wherein the laser annealing is carried out for 0.1 seconds to 5 minutes.

7. A transparent conductive film manufactured by a manufacturing method according to claim 1 .

8. The transparent conductive film according to claim 7 , wherein the transparent conductive film is made of indium tin oxide (ITO).

9. The transparent conductive film according to claim 7 , wherein the transparent conductive film has a specific resistance of 0.001 Ωcm to 0.01 Ωcm.

10. The transparent conductive film according to claim 7 , wherein the transparent conductive film has an average transmittance of 80% or more in a light spectrum of 400 to 800 nm.

11. A solar cell comprising a transparent conductive film according to claim 7 .

12. A liquid crystal display device comprising a transparent conductive film according to claim 7 .

Assignees

• Lg Chemical Ltd

Inventors

• Yoon Seokhyun
• Yoon Seokhee
• Jung Jinmi
• Shin Bugon

Classifications

• H01B1/02

  mainly consisting of metals or alloys · CPC title

• H01B1/08 Primary

  oxides · CPC title

• B82B1/00 Primary

  Nanostructures formed by manipulation of individual atoms or molecules, or limited collections of atoms or molecules as discrete units · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• H01B5/14

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