Conductive paste used for solar cell electrodes and method of manufacturing the solar cell electrodes
AssigneeE. I. Du Pont de Nemours and Company
InventorsISAO HAYASHI, Yumi Matsuura
Life of this patent
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Abstract
A conductive paste used for a solar cell electrode comprising, (i) 60 wt % to 95 wt % of a conductive powder; (ii) 0.1 wt % to 5.0 wt % of a lead-tellurium-oxide powder, comprising 20 wt % to 60 wt % of PbO and 20 wt % to 60 wt % of TeO2 based on the total weight of the lead-tellurium-oxide powder; (iii) 3 wt % to 38 wt % of an organic medium; and (iv) 0.1 wt % to 1.5 wt % of an inorganic oxide powder selected from the group consisting of Ho2O3, La2O3, Sm2O3, Y2O3, Yb2O3, Gd2O3 and a mixture thereof, based on the total weight of the conductive paste.
Claims12
A conductive paste used for a solar cell electrode comprising:
- (i) 60 wt % to 95 wt % of a conductive powder, based on the total weight of the conductive paste;
- (ii) 0.1 wt % to 5.0 wt % of a lead-tellurium-oxide powder, based on the total weight of the conductive paste, comprising 20 wt % to 60 wt % of PbO and 20 wt % to 60 wt % of TeO2, based on the total weight of the lead-tellurium-oxide powder;
- (iii) 3 wt % to 38 wt % of an organic medium, based on the total weight of the conductive paste;
- and
- (iv) 0.1 wt % to 1.5 wt % of an inorganic oxide powder selected from the group consisting of Ho2O3, La2O3, Sm2O3, Y2O3, Yb2O3, Gd2O3 and a mixture thereof, based on the total weight of the conductive paste.
A method of manufacturing a solar cell electrode comprising steps of:
- preparing a semiconductor substrate comprising a front side and a back side;
- applying onto the front side of the semiconductor substrate a conductive paste comprising, (i) 60 wt % to 95 wt % of a conductive powder, based on the total weight of the conductive paste, (ii) 0.1 wt % to 5.0 wt % of a lead-tellurium-oxide powder, based on the total weight of the conductive paste, comprising 20 wt % to 60 wt % of PbO and 20 wt % to 60 wt % of TeO2, based on the total weight of the lead-tellurium-oxide powder, (iii) 3 wt % to 38 wt % of an organic medium, based on the total weight of the conductive paste, and (iv) 0.1 wt % to 1.5 wt % of an inorganic oxide powder selected from the group consisting of Ho2O3, La2O3, Sm2O3, Y2O3, Yb2O3, Gd2O3 and a mixture thereof, based on the total weight of the conductive paste;
- and
- firing the applied conductive paste to form an electrode.
Dependencies are inferred from the claim text.