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Front-side metallization of silicon solar cells by nickel plating and light induced silver plating

: Aleman, M.; Bay, N.; Barucha, D.; Glunz, S.W.; Preu, R.

Galvanotechnik 100 (2009), No.2, pp.412-417
ISSN: 0016-4232
Journal Article
Fraunhofer ISE ()

At present, screen-printing is the industrial method of choice for forming front-side contacts. Granted, the method is robust, but results in terms of contact width and contact formation, especially for high-efficiency solar cells, are not optimal. For forming these front-side contacts, a new process was developed, not requiring an etching step, but using a laser beam for direct writing of the contact pattern. By making use of the special properties of the semiconductor substrate, a metallising step can be simultaneously carried out. The basic process, involving deposition of nickel, then silver, is described.