Metallisation and Interconnection of Thin-Film Polycrystalline Silicon Solar Cells on Glass

TL;DRAbstract

This paper presents the development of metallization and interconnection schemes for e-beam evaporated polycrystalline silicon thin-film solar cells on glass substrates. The method involves electrically isolating mini-cells by laser scribing, and then forming an isolation layer on each laser scribe. The main advantage of this metallization is to have a single aluminium evaporation step for the formation of finger and busbar features, as well as for series interconnection. The open-circuit voltage of the mini-module is the sum of individual cells’ voltages, indicating a successful interconnection. Of particular interest is a method for series connection of individual cells to primarily minimize light leakage to the glass substrate and thus to reduce associated current loss.

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