Composition for forming solar cell electrode and electrode prepared using the same

Patent metadata

Field	Value
Publication number	US-10439080-B2
Application number	US-201715654125-A
Country	US
Kind code	B2
Filing date	Jul 19, 2017
Priority date	Oct 28, 2016
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

A composition for solar cell electrodes includes silver powder, a glass frit, and an organic vehicle. The glass frit includes a first glass frit and a second glass frit. The first glass frit includes tellurium (Te) and silver (Ag) in a molar ratio (Te:Ag) of about 75:1 to about 1:25. The second glass frit includes a lead-tellurium-oxide (Pb—Te—O)-based glass frit or a bismuth-tellurium-oxide (Bi—Te—O)-based glass frit and is free from silver (Ag).

First claim

What is claimed is:

1. A composition for solar cell electrodes, comprising:
silver powder;
a glass frit; and
an organic vehicle,
wherein:
the glass frit includes a first glass frit and a second glass frit,
the first glass frit includes tellurium (Te) and silver (Ag) in a molar ratio (Te:Ag) of about 75:1 to about 1:25, and
the second glass frit includes a lead-tellurium-oxide (Pb—Te—O)-based glass fit or a bismuth-tellurium-oxide (Bi—Te—O)-based glass fit and is free from silver (Ag), wherein, in the glass frit, a weight ratio of the first glass frit to the second glass frit ranges from about 7:1 to about 1:5.

2. The composition for solar cell electrodes as claimed in claim 1 , wherein elemental silver (Ag) contained in the first glass frit is derived from a silver compound having an ionization temperature of about 1,000° C. or less.

3. The composition for solar cell electrodes as claimed in claim 1 , wherein elemental silver (Ag) contained in the first glass frit is derived from at least one silver compound selected from the group consisting of silver cyanide, silver nitrate, silver halide, silver carbonate, and silver acetate.

4. The composition for solar cell electrodes as claimed in claim 1 , wherein the second glass frit includes lead (Pb) and tellurium (Te) in a molar ratio of about 0.01:1 to about 0.5:1.

5. The composition for solar cell electrodes as claimed in claim 1 , wherein the second glass frit includes bismuth (Bi) and tellurium (Te) in a molar ratio of about 0.01:1 to about 0.4:1.

6. The composition for solar cell electrodes as claimed in claim 1 , the composition including:
about 60 wt % to about 95 wt % of the silver powder;
about 0.1 wt % to about 20 wt % of the glass fit; and
about 1 wt % to about 30 wt % of the organic vehicle.

7. The composition for solar cell electrodes as claimed in claim 1 , further including at least one additive selected from a dispersant, a thixotropic agent, a plasticizer, a viscosity stabilizer, an anti-foaming agent, a pigment, a UV stabilizer, an antioxidant, and a coupling agent.

8. A solar cell electrode fabricated using the composition for solar cell electrodes as claimed in claim 1 .

Assignees

• Samsung Sdi Co Ltd

Inventors

• Park Sang Hee
• Koo Hyun Jin
• Kim Tae Joon
• Park Min Su
• Lee Ji Seon
• Jung Myung Sung
• Ha Hyun Jin

Classifications

• C03C4/14

  for electro-conductive glass · CPC title

• C03C8/18

  containing free metals · CPC title

• C03C8/02

  Frit compositions, i.e. in a powdered or comminuted form · CPC title

• H01B1/22 Primary

  the conductive material comprising metals or alloys · CPC title

• C03C2205/00

  Compositions applicable for the manufacture of vitreous enamels or glazes · CPC title