Conductive paste composition, preparation method and use thereof, crystalline silicon solar cell
AssigneesSolamet Electronic Materials (Dongguan) Co., Ltd., Solamet Materials Science Co., Ltd.
InventorsPaul Douglas VerNooy, Qijie Guo
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Abstract
A conductive paste composition, a preparation method and a use thereof, as well as a crystalline silicon solar cell are disclosed. The conductive paste composition contains a silver powder and an aluminum powder, and contains a lead-boron-selenium glass frit or a bismuth-boron-selenium glass frit. The conductive paste composition can perform effective etching of a passivation film of an n-type crystalline silicon solar cell during a high temperature firing, and also does not over-oxidize the aluminum powder contained therein, thereby forming an electrode having decent electrical contact with a p-type doped emitter.
Claims17
A conductive paste composition, comprising:
- a lead-boron-selenium glass frit accounting for 0.5 wt % to 10 wt % of a total solid in the conductive paste composition;
- wherein based on a total weight of a dry weight of the lead-boron-selenium glass frit, the lead-boron-selenium glass frit at least contains lead-boron-selenium oxides with 51 wt % to 82 wt % of PbO, 4 wt % to 20 wt % of B2O3, and 1 wt % to 16 wt % of SeO2;
- the lead-boron-selenium oxides contained in the lead-boron-selenium glass frit are completely amorphous;
- or a first part of the lead-boron-selenium oxides contained in the lead-boron-selenium glass frit is amorphous, and a second part of the lead-boron-selenium oxides is crystalline, a content of the second part in the lead-boron-selenium glass frit accounts for less than 1.5% of a total weight of lead-boron-selenium oxides;
- a conductive component accounting for 87 wt % to 99 wt % of the total solid;
- an aluminum elemental component accounting for 0.5 wt % to 3 wt % of the total solid;
- and
- an organic medium.
A conductive paste composition, comprising:
- a bismuth-boron-selenium glass frit accounting for 0.5 wt % to 10 wt % of a total solid in the conductive paste composition;
- wherein based on a total weight of a dry weight of the bismuth-boron-selenium glass frit, the bismuth-boron-selenium glass frit at least contains bismuth-boron-selenium oxides with 50 wt % to 90 wt % of Bi2O3, 2 wt % to 35 wt % of B2O3, and 0.1 wt % to 15 wt % of SeO2;
- the bismuth-boron-selenium oxides contained in the bismuth-boron-selenium glass frit are completely amorphous;
- or a first part of the bismuth-boron-selenium oxides contained in the bismuth-boron-selenium glass frit is amorphous, and a second part of the bismuth-boron-selenium oxides is crystalline,
- a content of the second part in the bismuth-boron-selenium glass frit accounts for less than 1.5% of a total weight of bismuth-boron-selenium oxides;
- a conductive component accounting for 87 wt % to 99 wt % of the total solid;
- an aluminum elemental component accounting for 0.5 wt % to 3 wt % of the total solid;
- and
- an organic medium.
Dependencies are inferred from the claim text.