1. Plating metallization for bifacial i-TOPCon silicon solar cells.
- Author
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Grübel, Benjamin, Kluska, Sven, Cimiotti, Gisela, Schmiga, Christian, Arya, Varun, Steinhauser, Bernd, Goraya, Baljeet Singh, Nold, Sebastian, Hermle, Martin, Kamp, Mathias, Passig, Michael, Sieber, Markus, and Brunner, Damian
- Subjects
SILICON solar cells ,PHOTOVOLTAIC power systems ,SCREEN process printing ,SOLAR cells ,INDUSTRIAL capacity - Abstract
This work investigates in detail plating of Ni/Cu/Ag contacts as an alternative metallization approach for industrial bifacial tunneling oxide and passivating contacts (i-TOPCon) silicon solar cells. We have achieved a 23.3 % champion cell efficiency on a front and rear plated bifacial TOPCon silicon solar cell on industrial precursors on a 9 busbar design reaching the same mean efficiency level (η = 23.0 %) as industrially processed identical screen printed references. Further, plating metallization demonstrates the potential to contact poly-Si layer thicknesses below 100 nm with reasonable J
0,met . The substitution of printed silver by plated copper leads to a significant reduction in the cost of ownership of the metallization backend for i-TOPCon solar cells of about 7.38 $ct/wafer. The integration of plated Ni/Cu/Ag contacts enables a reduction in Ag consumption of about 19.7 t/Gigawatt production capacity compared to screen printing metallization. [ABSTRACT FROM AUTHOR]- Published
- 2022
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