Conductive paste composition for solar cells and solar cell

Patent metadata

Field	Value
Publication number	US-9312045-B2
Application number	US-201214235684-A
Country	US
Kind code	B2
Filing date	Jun 22, 2012
Priority date	Jul 29, 2011
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A conductive paste composition for a solar cell contains a conductive powder, a glass frit, and a vehicle. The glass fit includes glass containing SO 2 within a range of 0.05 to 5.0 (mol %) in terms of oxide.

First claim

The invention claimed is:

1. A conductive paste composition for a solar cell comprising a conductive powder, a glass frit, and an organic vehicle,
the glass frit comprising glass that comprises SO 2 within a range of 0.05 to 5.0 mol % in terms of oxide.

2. The conductive paste composition for a solar cell of claim 1 , wherein the glass further comprises Pb and Si in a Pb/Si mol ratio within a range of 0.8 to 2.3, and 0.6 to 18 mol % of Li 2 O, 18 to 64 mol %; of PbO, 1 to 18 mol % of B 2 O 3 , and 15 to 47 mol % of SiO 2 in terms of oxide.

3. The conductive paste composition for a solar cell of claim 2 , wherein the glass comprises 0.1 to 5.0 mol % of SO 2 , 1 to 15 mol % of Li 2 O, 22 to 62 mol % of PbO, 1 to 15 mol % of B 2 O 3 , and 20 to 41 mol % of SiO 2 in terms of oxide.

4. The conductive paste composition for a solar cell of claim 2 , wherein the glass further comprises at least one selected from the group consisting of Al 2 O 3 at 18 mol % or less, TiO 2 at 18 mol % or less, and ZnO at 30 mol % or less in terms of oxide.

5. The conductive paste composition for a solar cell of claim 1 , wherein the glass further comprises Pb and Si in a Pb/Si mol ratio within a range of 1.4 to 2.5, and 50 to 70 mol % of PbO, 1 to 8 mol % of B 2 O 3 , and 20 to 40 mol % of SiO 2 in terms of oxide without Li 2 O.

6. The conductive paste composition for a solar cell of claim 5 , wherein the Pb/Si mol ratio is within a range of 1.7 to 2.3, and the glass comprises 0.1 to 3.0 mol % of SO 2 , 55 to 62 mol % of PbO, 3 to 6 mol % of B 2 O 3 , and 28 to 34 mol of SiO 2 in terms of oxide.

7. The conductive paste composition for a solar cell of claim 5 , wherein the glass further comprises at least one selected from the group consisting of Al 2 O 3 at 5 mol % or less, TiO 2 at 10 mol % or less, and ZnO at 10 mol % or less in terms of oxide.

8. The conductive paste composition for a solar cell of claim 2 , wherein the glass further comprises 0.1 to 15 mol % of Bi 2 O 3 in terms of oxide.

9. The conductive paste composition for a solar cell of claim 1 , wherein the glass further comprises 6.0 mol % or less of P 2 O 5 in terms of oxide.

10. A solar cell comprising a light-receiving surface electrode formed with a fire-through method from a paste for an electrode comprising a conductive powder, a glass frit, and an organic vehicle,
the glass frit comprising glass that comprises SO 2 within a range of 0.05 to 5.0 mol % in terms of oxide.

11. The conductive paste composition for a solar cell of claim 1 , wherein the conductive powder is selected from the group consisting of silver powder, nickel powder, and copper powder.

12. The conductive paste composition for a solar cell of claim 1 , wherein the conductive powder is silver powder.

Assignees

• Yoshino Yasushi
• Kawamoto Yusuke
• Tsunoda Kosuke
• Noritake Co Ltd

Inventors

• Yoshino Yasushi
• Kawamoto Yusuke
• Tsunoda Kosuke

Classifications

• H10F77/211

  for photovoltaic cells · CPC title

• H01L31/022425

  Electricity · mapped topic

• H01B1/16 Primary

  the conductive material comprising metals or alloys · CPC title

• C03C3/072

  containing boron · CPC title

• H01B1/22 Primary

  the conductive material comprising metals or alloys · CPC title