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Proceedings Paper

Modeling of laser patterning of thin-film solar cells
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Paper Abstract

We report on theoretical models of the interaction of ultra-short laser pulses with multilayer structures used in thin-film solar cells. A finite-difference based optical model of light propagation within the thin-film system is used to determine the 3D-distribution of absorbed laser power in the structure. The model includes the evolution of the density of charge carriers which may be driven either by direct absorption of the laser radiation or multi-photon absorption and impact ionization of highly excited carriers. Depending on the excitation wavelength and pulse energy absorption occurs in different depths of the structure which has a large effect on the efficiency of the laser ablation process.

Paper Details

Date Published: 6 March 2014
PDF: 8 pages
Proc. SPIE 8967, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XIX, 896714 (6 March 2014); doi: 10.1117/12.2039813
Show Author Affiliations
Thomas Peschel, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
G. Matthäus, Friedrich-Schiller-Univ. Jena (Germany)
S. Nolte, Friedrich-Schiller-Univ. Jena (Germany)
R. Eberhardt, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)
A. Tünnermann, Fraunhofer-Institut für Angewandte Optik und Feinmechanik (Germany)


Published in SPIE Proceedings Vol. 8967:
Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XIX
Yoshiki Nakata; Xianfan Xu; Stephan Roth; Beat Neuenschwander, Editor(s)

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