# US 8,465,794 B2 · Glass compositions used in conductors for photovoltaic cells

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- Number: US 8,465,794 B2
- Document ID: US8465794B2
- Status: Granted
- Kind: B2
- Application number: 12/726,693
- Filed: 2010-03-18
- Published: 2010-09-23
- Granted: 2013-06-18
- Earliest claimed: 2009-03-19
- Assignees: E. I. Du Pont de Nemours and Company
- Applicants: Takuya Konno; Hisashi Matsuno; Brian J. Laughlin
- Inventors: Takuya Konno; Hisashi Matsuno; Brian J. Laughlin
- Web page: https://patentgrep.com/patent/US8465794B2

## CPC

- H01B 1/16: the conductive material comprising metals or alloys
- H05K 1/092: {Dispersed materials, e.g. conductive pastes or inks}
- Y02E 10/50: Photovoltaic [PV] energy
- 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

An objective of this present invention is to provide a conductive paste that could obtain good electrical property, for example series resistance in an electrode. An aspect of the present invention relates to a conductive paste which comprises electrically conductive powder; glass frit which comprises, based on weight percent (wt %) of the glass frit, 8-26 wt % of SiO2, 0.1-5 wt % of Al2O3, and 73-90 wt % of lead compound, wherein lead fluoride is contained in the range of 5-28 wt % based on the total weight of the lead compound; and organic medium.

## Claims

### Claim 1

A method of manufacturing a solar cell electrode comprising steps of:
providing a semiconductor substrate;
applying a conductive paste onto the semiconductor substrate, wherein the conductive paste comprises, electrically conductive powder, glass frit which comprises, based on weight percent (wt %) of the glass frit:
8-26 wt % of SiO2,
0.1-5 wt % of Al2O3,
0.5-5.0 wt % of B2O3, and
73-90 wt % of lead compound, wherein the lead compound comprises 5-18 wt % of lead fluoride based on the total weight of the lead compound; and
organic medium; and
firing the conductive paste.

### Claim 2 (depends on 1)

The method of manufacturing a solar cell electrode of claim 1, wherein the conductive paste is fired at a temperature of less than 930° C.

### Claim 3 (depends on 1)

The method of claim 1, wherein the conductive paste is fired for 2-5 minutes.

### Claim 4 (depends on 1)

A solar cell electrode manufactured by the method of claim 1.

### Claim 5 (depends on 4)

A solar cell comprising the solar cell electrode claim 4.