Glass frit, composition for solar cell electrodes including the same, and electrode fabricated using the same

Patent metadata

Field	Value
Publication number	US-9512032-B2
Application number	US-201314133763-A
Country	US
Kind code	B2
Filing date	Dec 19, 2013
Priority date	Dec 21, 2012
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A glass frit includes at least three metal oxides selected from the group of lead oxide, silicon oxide, tellurium oxide, bismuth oxide, zinc oxide, and tungsten oxide, wherein the glass frit exhibits a phase transition peak in the range of about 300° C. to about 600° C. on a cooling curve obtained via an TG-DTA analysis while a mixture of the glass frit and silver powder, obtained by mixing the glass frit with the silver powder in a weight ratio of 1:1, is cooled at a cooling rate of 10° C./min, after heating the mixture to 850° C. at a heating rate of 20° C./min and held there for a wait-time of 10 minutes.

First claim

What is claimed is:

1. A glass frit, comprising:
20 wt % to 60 wt % of tellurium oxide;
zinc oxide;
lead oxide; and
bismuth oxide; and
optionally silicon oxide; and
optionally tungsten oxide;
wherein:
the glass frit exhibits a phase transition peak in the range of 300° C. to 600° C. on a cooling curve obtained via an TG-DTA analysis while a mixture of the glass frit and silver powder, obtained by mixing the glass frit with the silver powder in a weight ratio of 1:1, is cooled at a cooling rate of 10° C./min, after heating the mixture to 850° C. at a heating rate of 20° C./min and held there for a wait-time of 10 minutes,
a weight ratio of the tellurium oxide to the lead oxide is 1:0.1 to 1:3, and a weight ratio of the tellurium oxide to the bismuth oxide is 1:0.1 to 1:3, and
the amount of zinc oxide is 6 to 10 wt % of the glass frit.

2. A composition for solar cell electrodes, the composition comprising:
60 wt % to 90 wt % of a conductive powder;
1 wt % to 10 wt % of the glass frit as claimed in claim 1 ; and
5 wt % to 30 wt % of an organic vehicle.

3. The composition as claimed in claim 2 , wherein the conductive powder includes at least one selected from the group consisting of silver, gold, palladium, platinum, copper, chromium, cobalt, aluminum, tin, lead, zinc, iron, iridium, osmium, rhodium, tungsten, molybdenum, nickel, and indium tin oxide.

4. The composition as claimed in claim 2 , wherein the glass frit has an average particle diameter (D 50 ) of 0.1 μm to 5 μm.

5. The composition as claimed in claim 2 , further comprising at least one additive selected from the group consisting of 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.

6. A solar cell electrode prepared from the composition as claimed in claim 2 .

7. The glass fit as claimed in claim 1 , comprising 25 wt % to 48 wt % of tellurium oxide.

8. The glass frit as claimed in claim 1 , wherein the glass frit is a lead oxide-silicon oxide-tellurium oxide-bismuth oxide-zinc oxide glass frit.

9. The glass frit as claimed in claim 1 , wherein the glass frit is a lead oxide-tellurium oxide-bismuth oxide-zinc oxide-tungsten oxide glass fit.

10. The glass frit as claimed in claim 1 , wherein the glass fit is a lead oxide-silicon oxide-tellurium oxide-bismuth oxide-zinc oxide-tungsten oxide glass fit.

11. The glass frit as claimed in claim 1 , wherein the glass frit is a lead oxide-tellurium oxide-bismuth oxide-zinc oxide glass fit.

Assignees

• Choi Young Wook
• Kim Eun Kyung
• Kim Ju Hee
• Park Young Ki
• Song Dae Seop
• Kim Jae Ho
• Yang Sang Hyun
• Cheil Ind Inc

Inventors

• Choi Young Wook
• Kim Eun Kyung
• Kim Ju Hee
• Park Young Ki
• Song Dae Seop
• Kim Jae Ho
• Yang Sang Hyun

Classifications

• C03C3/122

  containing oxides of As, Sb, Bi, Mo, W, V, Te as glass formers · CPC title

• C03C8/02 Primary

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

• H01L31/022466

  Electricity · mapped topic

• C03C8/10 Primary

  containing lead · CPC title

• H01L31/022483

  Electricity · mapped topic