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Crystalline silicon solar cells beyond 20% efficiency

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10 Author(s)
P. Ortega ; Grup de Micro i NanoTecnologies (MNT), Universitat Politècnica de Catalunya UPC, Barcelona, Spain ; G. López ; A. Orpella ; I. Martín
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This paper describes a fabrication process to obtain high efficiency c-Si cells (>; 20%) based on the Laser Fired Contact Passivated Emitter Rear Cell (LFC-PERC) concept. Photovoltaic efficiencies beyond 20% have been achieved using thermal SiO2 as a rear passivation layer on 2 cm × 2 cm solar cells with 0.45 Qcm Fz c-Si substrates. Efficiencies up to 22% are expected for material resistivities in the 0.4-5 Ωcm using an optimized rear contact grid.

Published in:

Proceedings of the 8th Spanish Conference on Electron Devices, CDE'2011

Date of Conference:

8-11 Feb. 2011