Ink composition for manufacturing light absorption layer including metal nano particles and method of manufacturing thin film using the same

Patent metadata

Field	Value
Publication number	US-9559243-B2
Application number	US-201514590947-A
Country	US
Kind code	B2
Filing date	Jan 6, 2015
Priority date	Jul 19, 2013
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

Disclosed are an ink composition for manufacturing a light absorption layer including metal nano particles and a method of manufacturing a thin film using the same, more particularly, an ink composition for manufacturing a light absorption layer including copper (Cu)-enriched Cu—In bimetallic metal nano particles and Group IIIA metal particles including S or Se dispersed in a solvent and a method of manufacturing a thin film using the same.

First claim

The invention claimed is:

1. An ink composition for manufacturing a light absorption layer comprising:
a solvent consisting of a mixture of alcohol-based solvents;
nano particles dispersed in the solvent,
wherein the only nano particles present in the ink composition consist of:
1) Cu 2 In bimetallic metal nano particles and In 2 S 3 nano particles;
2) Cu 2 In bimetallic metal nano particles, In 2 S 3 nano particles, and Ga 2 Se 3 nano particles;
3) Cu 2 In bimetallic metal nano particles and InGaS 3 nano particles; or
4) Cu 2 In bimetallic metal nano particles and In 2 Se 3 nano particles, and wherein a ratio of Cu to (In+Ga) in the ink composition is between 0.5 and 1.5.

2. The ink composition according to claim 1 , wherein a ratio of an amount of S and Se to an amount of In and Ga (n/m) is 0.5<(n/m)≦3.

3. The ink composition according to claim 1 , wherein the solvent is at least one organic solvent selected from the group consisting of alkanes, alkenes, alkynes, aromatics, ketons, nitriles, ethers, esters, organic halides, alcohols, amines, thiols, carboxylic acids, phosphines, phosphates, sulfoxides, and amides.

4. The ink composition according to claim 1 , wherein the ink composition further comprises an additive.

5. The ink composition according to claim 4 , wherein the additive is at least one selected from the group consisting of polyvinylpyrrolidone (PVP), Polyvinylalcohol, and ethyl cellulose.

Assignees

• Lg Chemical Ltd

Inventors

• Yoon Seokhee
• Yoon Seokhyun
• Yoon Taehun

Classifications

• C08K3/10

  Metal compounds · CPC title

• C09D11/52

  Electrically conductive inks · CPC title

• B22F9/24

  starting from liquid metal compounds, e.g. solutions · CPC title

• H01B1/02

  mainly consisting of metals or alloys · CPC title

• C22C9/00

  Alloys based on copper · CPC title