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Photonic crystals as rear-side diffusers and reflectors for high efficiency silicon solar cells

: Janz, S.; Voisin, P.; Suwito, D.; Peters, M.; Hermle, M.; Glunz, S.W.

Volltext urn:nbn:de:0011-n-1433167 (605 KByte PDF)
MD5 Fingerprint: b3b9e4b27f7b90d40f47432f6eaffeb1
Erstellt am: 31.8.2012

Sinke, W. ; WIP - Renewable Energies, München; European Commission; UNESCO; World Council for Renewable Energy; International Photovoltaic Equipment Association:
24th European Photovoltaic Solar Energy Conference 2009. CD-ROM : The compiled State-of-the-Art of PV Solar Technology and Deployment. Proceedings of the International Conference held in Hamburg, 21-25 September 2009
München, 2009
ISBN: 3-936338-25-6
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <24, 2009, Hamburg>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer ISE ()

The results in this publication show that it is possible to fabricate photonic crystals through spincoating of nano spheres made of Polymethylmethacrylate (PMMA) or SiO2, a subsequent infiltration with SiyC1-y using plasma enhanced chemical vapour deposition and optional burning out of the PMMA spheres. The structures are highly ordered and show enhanced reflectivity (600 nm spheres). An implementation of such structures into the process chain of high efficiency solar cells was done successfully. After passivating the solar cells rear side with SixC1-x and generating the photonic structure the rear metal contact was established with laser ablation and Al evaporation. Reflectivity measurements show reduced reflection for the solar cells with photonic structures and conductivity measurements proof that the rear contacting was successful.