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Evaluation of TOPCon technology on large area solar cells

: Feldmann, F.; Steinhauser, B.; Arya, V.; Büchler, A.; Brand, A.A.; Kluska, S.; Hermle, M.; Glunz, S.W.

Volltext urn:nbn:de:0011-n-4774486 (256 KByte PDF)
MD5 Fingerprint: 973d760572242b146ef4e7686543ec12
Erstellt am: 13.1.2018

Smets, A.:
33rd European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2017 : Proceedings of the international conference held in Amsterdam, The Netherlands, 25 September - 29 September 2017
München: WIP, 2017
ISBN: 978-3-936338-47-8
ISBN: 3-936338-47-7
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <33, 2017, Amsterdam>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ISE ()
Solarzellen - Entwicklung und Charakterisierung; Photovoltaik; Silicium-Photovoltaik; Herstellung und Analyse von hocheffizienten Solarzellen

Passivating contacts, like TOPCon or poly-Si/SiOx, have pushed the efficiency of crystalline silicon (c-Si) solar cells notably. Currently, the world-record efficiency of 25.7% for a both-sided contact solar cell has been achieved by an n-type solar cell featuring a selective boron front emitter and a passivating rear contact (TOPCon). Like the 25%-efficient PERL cell, this record cell was realized on a small area of 2x2 cm² using lab processes, like photolithography and evaporation of metal contacts. This paper addresses the first steps towards the realization of a large area TOPCon cell by industry-relevant fabrication steps. The scope of this paper lies on the application of laser ablation and NiCu plating to a 1.5μm deep, 140 Ω/sq boron-diffused emitter. The 10x10 cm² cell yielded an efficiency of 22.9%.