FEM-based optical modeling of silicon thin-film tandem solar cells with randomly textured interfaces in 3D

Martin Hammerschmidt; Daniel Lockau; Sven Burger; Frank Schmidt; Christoph Schwanke; Simon Kirner; Sonya Calnan; Bernd Stannowski; Bernd Rech

doi:10.1117/12.2001789

25 March 2013 FEM-based optical modeling of silicon thin-film tandem solar cells with randomly textured interfaces in 3D

Martin Hammerschmidt, Daniel Lockau, Sven Burger, Frank Schmidt, Christoph Schwanke, Simon Kirner, Sonya Calnan, Bernd Stannowski, Bernd Rech

Author Affiliations +

Proceedings Volume 8620, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II; 86201H (2013) https://doi.org/10.1117/12.2001789
Event: SPIE OPTO, 2013, San Francisco, California, United States

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.

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Martin Hammerschmidt, Daniel Lockau, Sven Burger, Frank Schmidt, Christoph Schwanke, Simon Kirner, Sonya Calnan, Bernd Stannowski, and Bernd Rech "FEM-based optical modeling of silicon thin-film tandem solar cells with randomly textured interfaces in 3D", Proc. SPIE 8620, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II, 86201H (25 March 2013); https://doi.org/10.1117/12.2001789

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