Media type: E-Article Title: Laser structuring for back junction silicon solar cells Contributor: Engelhart, Peter; Harder, Nils‐Peter; Grischke, Rainer; Merkle, Agnes; Meyer, Rüdiger; Brendel, Rolf imprint: Wiley, 2007 Published in: Progress in Photovoltaics: Research and Applications Language: English DOI: 10.1002/pip.732 ISSN: 1062-7995; 1099-159X Keywords: Electrical and Electronic Engineering ; Condensed Matter Physics ; Renewable Energy, Sustainability and the Environment ; Electronic, Optical and Magnetic Materials Origination: Footnote: Description: <jats:title>Abstract</jats:title><jats:p>We demonstrate mask‐free fabrication of a 22·0%‐efficient crystalline Si solar cell by applying laser ablation of Si and by laser ablation of protective coatings. The bulk absorber material is a <jats:bold><jats:italic>p</jats:italic></jats:bold>‐type float zone silicon wafer and the designated cell area is 4 cm<jats:sup>2</jats:sup>. While the processing time of our laboratory‐type of laser system is far too slow for industrial processing, we estimate on the basis of our experiments that laser processing of 12·5 × 12·5 cm<jats:sup>2</jats:sup>‐sized solar cells in just a few seconds is feasible with commercially available equipment. Copyright © 2006 John Wiley & Sons, Ltd.</jats:p>