12 October 2012 Extending the limits of laser beam shaping for PV-cell manufacturing
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Proceedings Volume 8473, Laser Material Processing for Solar Energy; 84730N (2012); doi: 10.1117/12.931658
Event: SPIE Solar Energy + Technology, 2012, San Diego, California, United States
Abstract
Laser processing of photovoltaic cells enables the manufacturing of high-efficiency cells and offers opportunities to cut down costs. Structuring of selective emitters or laser fired contacts requires precise laser beam shaping. In this paper we identify key design parameters for industrial applications of Gaussian-to-top hat converters. We derive the physical limits for top hats close to the diffraction limited and compare the performance of actual beam shapers to these limits. Additionally we present details and first measurements of our improved solution to scan a 50μm top hat, allowing to structure a 156mm wafer in a few seconds.
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I. Steiner, T. Mitra, "Extending the limits of laser beam shaping for PV-cell manufacturing", Proc. SPIE 8473, Laser Material Processing for Solar Energy, 84730N (12 October 2012); doi: 10.1117/12.931658; https://doi.org/10.1117/12.931658
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KEYWORDS
Beam shaping

Manufacturing

Solar energy

Diffraction

Mirrors

Laser processing

Solar cells

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