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Development of rear passivated laser grooved buried contact (LGBC) laser fired contact (LFC) silicon solar cells using thin wafers

: Morrison, D.J.; Devenport, S.; Heasman, K.C.; Schmiga, C.; Glatthaar, M.

Fulltext urn:nbn:de:0011-n-2366223 (456 KByte PDF)
MD5 Fingerprint: 15454c1fac9048e8d3ce0e616d9edb13
Created on: 12.4.2013

Nowak, S. ; European Commission:
27th European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2012. DVD-ROM : Proceedings of the international conference held in Frankfurt, Germany, 24 - 28 September 2012
München: WIP-Renewable Energies, 2012
ISBN: 3-936338-28-0
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <27, 2012, Frankfurt>
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Solarzellen - Entwicklung und Charakterisierung; Silicium-Photovoltaik; Herstellung und Analyse von hocheffizienten Solarzellen; Industrielle und neuartige Solarzellenstrukturen

The cost per watt peak of solar modules must be reduced to ensure long term commercial viability. Manufacturing costs can be reduced by using thinner silicon wafers. Thin wafers are also advantageous in that they have lower bulk recombination. However, as wafer thickness is reduced, surface recombination becomes a limiting factor for cell efficiency. The advantages of thin cells can be exploited by incorporating a good rear passivation. The FP7 funded project 20Pl s , aims to produce well passivated 20% efficiency solar cells on 100 m Cz monocrystalline wafers.In this paper we describe the integration of a AlOx/SiOx rear passivating layer into a high efficiency LGBC solar cell structure fabricated using 100 m and 160 m thick industry standard Cz Si. These cells have significantly higher open circuit voltages (Voc) and short-circuit current densities (Jsc) than standard LGBC cells and hence show potential for higher cell efficiencies.