Composition for forming solar cell electrode and electrode produced from same

Patent metadata

Field	Value
Publication number	US-9944802-B2
Application number	US-201414901629-A
Country	US
Kind code	B2
Filing date	Jun 27, 2014
Priority date	Aug 28, 2013
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

The present invention relates to a composition for forming a solar cell electrode, comprising: silver (Ag) powder; a glass frit comprising silver (Ag) and tellurium (Te) elements; and an organic vehicle, wherein the glass frit has a mole ratio of 1:01 to 1:25 of Ag to Te. The solar cell electrode produced from the composition has excellent fill factor and conversion efficiency as contact resistance (Rc) and series resistance (Rs) are minimized.

First claim

The invention claimed is:

1. A composition for solar cell electrodes, the composition comprising:
a silver (Ag) powder;
a glass frit containing elemental silver and elemental tellurium; and
an organic vehicle,
wherein the glass frit has a mole ratio of silver to tellurium of 1:0.1 to 1:25, and
wherein the elemental silver in the glass frit is derived from at least one of silver cyanide, silver nitrate, silver halide, silver carbonate, and silver acetate.

2. The composition according to claim 1 , wherein the glass frit further includes at least one of lead (Pb), bismuth (Bi), phosphorus (P), germanium (Ge), gallium (Ga), antimony (Sb), cerium (Ce), iron (Fe), lithium (Li), silicon (Si), zinc (Zn), tungsten (W), magnesium (Mg), cesium (Cs), strontium (Sr), molybdenum (Mo), titanium (Ti), tin (Sn), indium (In), vanadium (V), ruthenium (Ru), barium (Ba), nickel (Ni), copper (Cu), sodium (Na), potassium (K), arsenic (As), cobalt (Co), zirconium (Zr), manganese (Mn), neodymium (Nd), chromium (Cr), and aluminum (Al).

3. The composition according to claim 1 , wherein the glass frit is formed from a metal oxide and the at least one of silver cyanide, silver nitrate, silver halide, silver carbonate, and silver acetate, the metal oxide including tellurium oxide.

4. The composition according to claim 3 , wherein the metal oxide further includes at least one of lead (Pb) oxide, bismuth (Bi) oxide, phosphorus (P) oxide, germanium (Ge) oxide, gallium (Ga) oxide, antimony (Sb) oxide, cerium (Ce) oxide, iron (Fe) oxide, lithium (Li) oxide, silicon (Si) oxide, zinc (Zn) oxide, tungsten (W) oxide, magnesium (Mg) oxide, cesium (Cs) oxide, strontium (Sr) oxide, molybdenum (Mo) oxide, titanium (Ti) oxide, tin (Sn) oxide, indium (In) oxide, vanadium (V) oxide, ruthenium (Ru) oxide, barium (Ba) oxide, nickel (Ni) oxide, copper (Cu) oxide, sodium (Na) oxide, potassium (K) oxide, arsenic (As) oxide, cobalt (Co) oxide, zirconium (Zr) oxide, manganese (Mn) oxide, neodymium (Nd) oxide, chromium (Cr) oxide, and aluminum (Al) oxide.

5. The composition according to claim 1 , wherein the composition includes:
60 wt % to 95 wt % of the silver powder;
0.1 wt % to 20 wt % of the glass fit; and
1 wt % to 30 wt % of the organic vehicle, all wt % based on a total weight of the composition.

6. The composition according to claim 1 , wherein the glass frit contains 0.1 mol % to 50 mol % of the elemental silver, based on a total number of moles of the glass frit.

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

8. The composition according to claim 1 , further comprising: at least one 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.

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

Assignees

• Samsung Sdi Co Ltd

Inventors

• Park Sang Hee
• Koo Hyun Jin
• Kim Tae Joon
• Song Hun Gyu

Classifications

• C09D5/24 Primary

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

• C03C8/18

  containing free metals · CPC title

• C09D7/1216

  Chemistry & Metallurgy · mapped topic

• Y02E10/50

  Photovoltaic [PV] energy · CPC title

• C09D1/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances · CPC title