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

Patent metadata

Field	Value
Publication number	US-10315950-B2
Application number	US-201715610999-A
Country	US
Kind code	B2
Filing date	Jun 1, 2017
Priority date	Jun 15, 2016
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A composition for solar cell electrodes including a conductive powder, a glass frit, and an organic vehicle. The glass frit contains tellurium (Te), sodium (Na), zinc (Zn), and at least one of lead (Pb) and bismuth (Bi). A molar ratio of the sum of lead and bismuth to zinc ranges from about 1 to about 20. A molar ratio of tellurium to sodium ranges from about 1 to about 15.

First claim

What is claimed is:

1. A composition for solar cell electrodes, the composition comprising:
a conductive powder,
a glass frit, and
an organic vehicle,
wherein the glass frit contains tellurium (Te), sodium (Na), zinc (Zn), lead (Pb), and bismuth (Bi), and
a molar ratio of the sum of lead and bismuth to zinc ranges from about 5 to about 20, and a molar ratio of tellurium to sodium ranges from about 1 to about 15.

2. The composition for solar cell electrodes as claimed in claim 1 , wherein the molar ratio of the sum of lead and bismuth to zinc ranges from about 5 to about 15.

3. The composition for solar cell electrodes according as claimed in claim 1 , wherein the molar ratio of tellurium to sodium ranges from about 1 to about 10.

4. The composition for solar cell electrodes as claimed in claim 1 , wherein the glass frit includes about 25 mol % to about 40 mol % of the sum of lead and bismuth, about 10 mol % to about 45 mol % of tellurium, about 1 mol % to about 20 mol % of sodium, and about 2 mol % to about 5 mol % of zinc.

5. The composition for solar cell electrodes as claimed in claim 1 , wherein the glass frit further includes at least one of aluminum, calcium, boron, copper, iron, potassium, magnesium, and silicon.

6. The composition for solar cell electrodes as claimed in claim 1 , including:
about 60 wt % to about 95 wt % of the conductive powder;
about 0.1 wt % to about 20 wt % of the glass frit; 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 comprising 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 antioxidants, and a coupling agents.

8. A solar cell electrode fabricated using the composition for solar cell electrodes according to claim 1 .

9. A solar cell electrode fabricated using the composition for solar cell electrodes according to claim 2 .

10. A solar cell electrode fabricated using the composition for solar cell electrodes according to claim 3 .

11. A solar cell electrode fabricated using the composition for solar cell electrodes according to claim 4 .

12. A solar cell electrode fabricated using the composition for solar cell electrodes according to claim 5 .

13. A solar cell electrode fabricated using the composition for solar cell electrodes according to claim 6 .

14. A solar cell electrode fabricated using the composition for solar cell electrodes according to claim 7 .

Assignees

• Samsung Sdi Co Ltd

Inventors

• Cho Jae Hwi
• Kim Dong Suk
• Jung Seok Hyun

Classifications

• C03C8/04

  containing zinc · CPC title

• C03C2205/00

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

• H01L31/022425

  Electricity · mapped topic

• C03C3/142

  containing lead · CPC title

• C03C8/18 Primary

  containing free metals · CPC title