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Proceedings Paper

FEM-based optical modeling of silicon thin-film tandem solar cells with randomly textured interfaces in 3D
Author(s): Martin Hammerschmidt; Daniel Lockau; Sven Burger; Frank Schmidt; Christoph Schwanke; Simon Kirner; Sonya Calnan; Bernd Stannowski; Bernd Rech
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Paper Abstract

Light trapping techniques are one of the key research areas in thin film silicon photovoltaics. Since the 1980s randomly rough textured front transparent oxides (TCOs) have been the methods of choice as light trapping strategies for thin-film devices. Light-trapping efficiency can be optimized by means of optical simulations of nano-structured solar cells. We present a FEM based simulator for 3D rigorous optical modeling of amorphous silicon / microcrystalline silicon tandem thin-film solar cells with randomly textured layer interfaces. We focus strongly on an error analysis study for the presented simulator to demonstrate the numerical convergence of the method and investigate grid and finite element degree refinement strategies in order to obtain reliable simulation results.

Paper Details

Date Published: 25 March 2013
PDF: 9 pages
Proc. SPIE 8620, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II, 86201H (25 March 2013); doi: 10.1117/12.2001789
Show Author Affiliations
Martin Hammerschmidt, Konrad-Zuse-Zentrum für Informationstechnik Berlin (Germany)
Daniel Lockau, Konrad-Zuse-Zentrum für Informationstechnik Berlin (Germany)
Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (Germany)
Sven Burger, Konrad-Zuse-Zentrum für Informationstechnik Berlin (Germany)
JCMwave GmbH (Germany)
Frank Schmidt, Konrad-Zuse-Zentrum für Informationstechnik Berlin (Germany)
JCMwave GmbH (Germany)
Christoph Schwanke, PVcomB (Germany)
Simon Kirner, PVcomB (Germany)
Sonya Calnan, PVcomB (Germany)
Bernd Stannowski, PVcomB (Germany)
Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (Germany)
Bernd Rech, PVcomB (Germany)
Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (Germany)


Published in SPIE Proceedings Vol. 8620:
Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II
Alexandre Freundlich; Jean-Francois Guillemoles, Editor(s)

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