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N-type multicrystalline silion for high efficiency solar cells

: Riepe, S.; Krenckel, P.; Schindler, F.; Schubert, M.; Benick, J.

Photovoltaics International 32 (2016), pp.25-30
ISSN: 1757-1197
Journal Article
Fraunhofer ISE ()
Materialien - Solarzellen und Technologie; Photovoltaik; Silicium-Photovoltaik; feedstock; Kristallisation und Wafering; silicon; n-type; TOPCon solar cell

High-efficiency silicon solar cells require silicon wafers of high electrical quality as the base material. One advantage of n-type compared with p-type doped silicon is the smaller impact of many metal impurities on the electrical material quality. This applies especially to n-type multicrystalline silicon ingots produced by the directional solidification process, with dissolved metal impurities typically introduced by the crucible system.