# US 9,039,937 B1 · Composition for solar cell electrodes and electrode fabricated using the same

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- Number: US 9,039,937 B1
- Document ID: US9039937B1
- Status: Granted
- Kind: B1
- Application number: 14/534,370
- Filed: 2014-11-06
- Published: 2015-06-18
- Granted: 2015-05-26
- Earliest claimed: 2013-12-17
- Assignees: Samsung SDI Co., Ltd.
- Applicants: Samsung SDI Co., Ltd.
- Inventors: Seok Hyun Jung; Young Ki Park; Dong Suk Kim; Ju Hee Kim; Min Su Park; Koon Ho Kim; Min Jae Kim; Seak Cheol Kim; Sang Hyun Yang
- Web page: https://patentgrep.com/patent/US9039937B1

## CPC

- H10F 77/211: {for photovoltaic cells}
- C03C 3/122: {containing oxides of As, Sb, Bi, Mo, W, V, Te as glass formers}
- C03C 4/14: for electro-conductive glass
- C03C 8/04: containing zinc
- C03C 8/18: containing free metals
- C09D 5/24: Electrically-conducting paints {(conductive materials H01B1/00)}
- H01B 1/22: the conductive material comprising metals or alloys
- H10F 77/20: Electrodes
- H05K 1/092: {Dispersed materials, e.g. conductive pastes or inks}
- Y02E 10/50: Photovoltaic [PV] energy
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A composition for solar cell electrodes includes a silver powder; a glass frit; and an organic vehicle, wherein the glass frit includes bismuth (Bi), tellurium (Te), and chromium (Cr).

## Claims

### Claim 1

A composition for solar cell electrodes, comprising:
a silver powder;
a glass frit; and
an organic vehicle,
wherein the glass frit includes bismuth (Bi), tellurium (Te), and chromium (Cr), and a mole ratio of chromium to tellurium in the glass frit ranges from about 1:1 to about 1:80.

### Claim 2 (depends on 1)

The composition as claimed in claim 1, wherein the glass frit further includes at least one element selected from lead (Pb), lithium (Li), zinc (Zn), tungsten (W), phosphorus (P), silicon (Si), magnesium (Mg), cesium (Ce), strontium (Sr), molybdenum (Mo), titanium (Ti), tin (Sn), indium (In), vanadium (V), barium (Ba), nickel (Ni), copper (Cu), sodium (Na), potassium (K), antimony (Sb), germanium (Ge), gallium (Ga), calcium (Ca), arsenic (As), cobalt (Co), zirconium (Zr), manganese (Mn), aluminum (Al), and boron (B).

### Claim 3 (depends on 1)

The composition as claimed in claim 1, wherein the glass fit includes about 5 mol % to about 50 mol % of lead (Pb) based on a total weight of the glass frit.

### Claim 4 (depends on 1)

The composition as claimed in claim 1, wherein the glass frit is prepared from a mixture of metal oxides including about 5 wt % to about 30 wt % of bismuth oxide, about 40 wt % to about 80 wt % of tellurium oxide, about 1 wt % to about 15 wt % of chromium oxide, and about 1 wt % to about 50 wt % of a fourth metal oxide.

### Claim 5 (depends on 4)

The composition as claimed in claim 4, wherein the fourth metal oxide includes at least one metal oxide selected from lead (Pb), lithium (Li), zinc (Zn), tungsten (W), phosphorus (P), silicon (Si), magnesium (Mg), cesium (Ce), strontium (Sr), molybdenum (Mo), titanium (Ti), tin (Sn), indium (In), vanadium (V), barium (Ba), nickel (Ni), copper (Cu), sodium (Na), potassium (K), antimony (Sb), germanium (Ge), gallium (Ga), calcium (Ca), arsenic (As), cobalt (Co), zirconium (Zr), manganese (Mn), aluminum (Al), and boron (B) oxides.

### Claim 6 (depends on 4)

The composition as claimed in claim 4, wherein the fourth metal oxide includes about 1 wt % to about 10 wt % of lithium oxide, about 1 wt % to about 10 wt % of zinc oxide, and about 1 wt % to about 10 wt % of tungsten oxide based on the total weight of the mixture of metal oxides.

### Claim 7 (depends on 4)

The composition as claimed in claim 4, wherein the fourth metal oxide includes about 15 wt % to about 50 wt % of lead oxide based on a total weight of the mixture of metal oxides.

### Claim 8 (depends on 1)

The composition as claimed in claim 1, including:
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.

### Claim 9 (depends on 1)

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

### Claim 10 (depends on 1)

The composition 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 antioxidant, and a coupling agent.

### Claim 11 (depends on 1)

The composition as claimed in claim 1, wherein the organic vehicle includes a binder resin, the binder resin having a weight average molecular weight (Mw) of about 30,000 g/mol to about 200,000 g/mol.

### Claim 12 (depends on 1)

The composition as claimed in claim 1, wherein the composition has a viscosity of about 100,000 cps to about 500,000 cps.

### Claim 13 (depends on 1)

A solar cell electrode fabricated using the composition for solar cell electrodes as claimed in claim 1.