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Co-diffused back-contact back-junction silicon solar cells

: Keding, R.; Stüwe, D.; Kamp, M.; Reichel, C.; Wolf, A.; Woehl, R.; Borchert, D.; Reinecke, H.; Biro, D.

Fulltext urn:nbn:de:0011-n-2669328 (141 KByte PDF)
MD5 Fingerprint: b6b881773fa4f5b31ec05fb6e8324a83
Created on: 29.11.2013

Mine, A. ; European Commission:
28th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2013. Proceedings. DVD-ROM : 30 September to 04 October 2013, Paris, France
München: WIP-Renewable Energies, 2013
ISBN: 3-936338-33-7
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <28, 2013, Paris>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
PV Produktionstechnologie und Qualitätssicherung; Silicium-Photovoltaik; Dotierung und Diffusion; Kontaktierung und Strukturierung; Herstellung und Analyse von hocheffizienten Solarzellen; Pilotherstellung von industrienahen Solarzellen; Rückseitenkontaktsolarzellen; MWT; EWT; IBC; Devices; Diffusion; PECVD

Aiming for industrial solar cell fabrication the ratio of costs to watt peak has to be lowered [1]. This can be achieved by either decreasing the overall solar cell manufacturing costs including material, process and module assembly or increasing solar cell efficiency [2]. One very promising approach for decreasing optical losses on the front side of the cell and thus increasing the solar cell efficiency is to contact solar cells only on the back side. Back-contact back-junction (BC-BJ) solar cells already showed efficiencies over 24% [3]. Since the assembly of this type of solar cell is combined with a high process effort and hence high production costs, simplifications of the process sequences are needed. This can be achieved e.g. by avoiding several cost-intensive high temperature steps by implementing a co-diffusion process. Further the avoidance of the so called gap region – region between the highly doped areas on the cell rear side - would lead to a reduction of process steps.