InImpact: The Journal of Innovation Impact

Publisher Future Technology Press
Vol. 7 No. 2 KES Transactions on SDM I - Sustainable Design and Manufacturing 2014
Volume Editors KES International
Journal ISSN 2051-6002
Article TitleInvestigations on repetition rate and laser wavelength for efficient generation of black silicon solar cells
Primary AuthorViktor Schütz, Laser Zentrum Hannover e.V.
Other Author(s) Jürgen Koch; Oliver Suttmann; Ludger Overmeyer
Pages 936 - 949
Article ID sdm14-077
Publication Date 01-May-16
AbstractUltra-short pulsed laser radiation applied on silicon decreases the reflectivity by modifying the surface topology by ablation to achieve a so called “black silicon” texture. A multitude of laser processing parameters are investigated in order to classify the reflectivity reduction. Exemplarily, 5-inch mc-silicon solar wafers are machined in a first step with high throughput using a linear 7-foci diffractive optical element (DOE). In a second step, solar cells are built up to determine the efficiency gain by the laser surface modification. A preliminary absolute efficiency gain of ?? > 0.2 % is achieved at an absolute reflectivity reduction of globally 11.2 % in comparison to a conventional isotexture.
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