Conductive paste and method for producing TOPCon solar cell
AssigneeToyo Aluminium Kabushiki Kaisha
InventorsNaoya Morishita, Marwan Dhamrin
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Abstract
This invention provides a conductive paste and a method for producing a TOPCon solar cell, by which a TOPCon solar cell can be produced by a simple method, and additionally, a TOPCon solar cell can be constructed with excellent conversion efficiency. Specifically, the invention provides a conductive paste for use as a back electrode for TOPCon solar cells, the conductive paste comprising aluminum-silicon alloy particles, an organic vehicle, and a glass powder, the aluminum-silicon alloy particles having a silicon concentration of 25 wt % or more and 40 wt % or less.
Claims4
A conductive paste for use as a back electrode for a TOPCon solar cell, the conductive paste comprising aluminum-silicon alloy particles, an organic vehicle, and a glass powder, the aluminum-silicon alloy particles having a silicon concentration of 25 wt % or more and 40 wt % or less,
- the content of the aluminum-silicon alloy particles in the conductive paste being 50 wt % or more,
- the content of the components of the conductive paste other than the aluminum-silicon alloy particles, the organic vehicle, and the glass powder being 5 wt % or less,
- the glass powder comprising at least one member selected from the group consisting of lead (Pb), bismuth (Bi), vanadium (V), boron (B), tin (Sn), phosphorus (P), zinc (Zn), and a lead-free glass powder, and
- the lead-free glass powder being at least one member selected from the group consisting of bismuth-based, vanadium-based, tin-phosphorus-based, zinc-borosilicate-based, and alkali-borosilicate-based glass powders.
Dependencies are inferred from the claim text.