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  Simashkevich, A.; Sherban, D.; Bruc, L.; Rusu, M.; Wiesner, S.; Abashkin, V.; Harea, E.; Usatyi, I.: 20.9%-Efficient bifacial isotype solar cell. In: Ossenbrink, H. [u.a.] [Eds.] : 26th European Photovoltaic Solar Energy Conference 5 - 9 September, Hamburg, GermanyMünchen: WIP, 2011. - ISBN 3-936338-27-2, p. 2288-2291

Abstract:
The optimization ways and related photovoltaic parameters of the mono- and bi-facial solar cells based on n+ITO-SiO2-nSi isotype structures are presented. A technique for texturing the surface of silicon wafers oriented in (100) plane to form a regular pattern of inverted pyramids as well as irregular topography patterns was developed. The efficiency of the solar cells with monofacial sensitivity from silicon wafers with the surface patterned in the form of inverted pyramids was increased from 10.1 to 15.8%, which is by more than 5% higher compared to the efficiency of the solar cells with unstructured silicon surface. For solar cells with bifacial sensitivity, the total efficiency was increased from 12.6 to 15.7% for the case of irregular patterned silicon surface and up to 20.9% in the case of the regular patterned silicon surface. The developed and applied technique for the structurization of the surface of silicon wafers for solar cell devices resulted in an efficiency increase to up to 15.8% for monofacial and up to 20.9% for bifacial solar cells. Keywords: ITO, Interface, Bifacial, Silicon Solar Cell, Optical Losses, Spray Pyrolysis, Texturization