Composition for forming solar cell electrode and electrode manufactured therefrom

Patent metadata

Field	Value
Publication number	US-10388803-B2
Application number	US-201414761215-A
Country	US
Kind code	B2
Filing date	Sep 12, 2014
Priority date	Sep 13, 2013
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

Disclosed herein is a composition for solar cell electrodes. The composition includes silver powder; glass frits; and an organic vehicle, wherein the glass frits have a glass transition temperature of about 100° C. to about 300° C. and exhibit an exothermic peak starting temperature of about 200° C. to about 400° C. on a DTA curve in TG-DTA analysis. Solar cell electrodes formed of the composition have high open circuit voltage and short circuit current density, thereby providing excellent conversion efficiency and fill factor.

First claim

The invention claimed is:

1. A composition for solar cell electrodes, the composition comprising:
silver powder;
glass frit that is free of boron oxide; and
an organic vehicle,
wherein the glass frit:
has a glass transition temperature of about 100° C. to less than 300° C., and
exhibits an exothermic peak starting temperature of about 200° C. to about 400° C. on a DTA curve in TG-DTA analysis,
wherein the glass frit includes a Pb—Bi—Te—O-based glass frit that does not include vanadium oxide and that includes:
greater than 30 wt % to about 70 wt % of lead oxide,
greater than 10 wt % to about 20 wt % of bismuth oxide, and
about 10 wt % to less than 60 wt % of tellurium oxide, and

wherein a weight ratio of the lead oxide to the tellurium oxide is about 1:1.3 to less than 1:2.

2. The composition according to claim 1 , wherein the glass frit further includes at least one oxide selected from silicon oxide, barium oxide, phosphorus oxide, magnesium oxide, cerium oxide, strontium oxide, molybdenum oxide, titanium oxide, tin oxide, indium oxide, nickel oxide, copper oxide, antimony oxide, germanium oxide, gallium oxide, calcium oxide, arsenic oxide, cobalt oxide, zirconium oxide, manganese oxide, neodymium oxide, tungsten oxide, chromium oxide, and aluminum oxide.

3. The composition according to claim 1 , wherein the composition includes:
about 60 wt % to about 95 wt % of the silver powder;
about 0.5 wt % to about 20 wt % of the glass fit; and
about 1 wt % to about 30 wt % of the organic vehicle.

4. The composition according to claim 1 , wherein the glass frit has an average particle diameter (D50) of about 0.1 μm to about 10 μm.

5. The composition according to claim 1 , further comprising: at least one additive selected from dispersants, thixotropic agents, plasticizers, viscosity stabilizers, anti-foaming agents, pigments, UV stabilizers, antioxidants, and coupling agents.

6. A solar cell electrode prepared from the composition for solar cell electrodes according to claim 1 .

Assignees

• Samsung Sdi Co Ltd

Inventors

• Jung Seok Hyun
• Kim Dong Suk
• Park Min Su
• Park Young Ki
• Kim Koon Ho
• Kim Min Jae
• Kim Seakcheol
• Seo Yong Je

Classifications

• H01B1/16

  the conductive material comprising metals or alloys · CPC title

• H01B1/22

  the conductive material comprising metals or alloys · CPC title

• Y02E10/50

  Photovoltaic [PV] energy · CPC title

• C09D5/24

  Electrically-conducting paints {(conductive materials H01B1/00)} · CPC title

• C03C8/18

  containing free metals · CPC title