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Feasibility Study of Synergistic Back-Contact Silicon Solar Cells Metallization and Electrically Conductive Adhesive Interconnection Approach
T. Timofte, S. Grosser, M. Pander, T. Fischer, R. Wade, M.I. Devoto, C. Erban, J. Libal, K. Wienands, T. Messmer, D. Tune, A. Halm
Back Contact, Module Manufacturing, PV Materials, Characterisation
Photovoltaic Modules and BoS Components
Subtopic: PV Module Design and Manufacturing
Event: 8th World Conference on Photovoltaic Energy Conversion
Session: 3CO.4.5
551 - 558
ISBN: 3-936338-86-8
Paper DOI: 10.4229/WCPEC-82022-3CO.4.5
0,00 EUR
Document(s): paper, presentation


The successful industrialization of a solar cell technology must consider, beside technical and reliability aspects, also the competitiveness of process costs with respect to the main stream solar cell technologies. Since silver component is a considerable part of the cost of ownership of solar cells, the aim of this study is to push the boundaries of silver paste reduction at solar cell level, as well as at ECA interconnection process level. Through our approach we investigate the feasibility of the replacement of silver busbar of the IBC ZEBRA cell with the ECA interconnection line, as well as the interconnection through ECA pads. These variations were tested at established industrial process environments (qualified processes were implemented at TeamTechnik stringers: TT 1400ECA for ECA interconnection and TT2100 for soldered strings). The produced strings we investigated regarding extent of ECA curing, polymer compatibility, mechanical stability, electrical performance and reliability. Through this comprehensive investigation we obtain a clear identification for reliable configurations, which are worth following at further IBC ZEBRA interconnection process developments, as well as the experimentally determined material saving.