Optical properties of textured sheets-an efficient matrix-based modelling approach
Tucher N, Eisenlohr J, Kiefel P, Hoehn O, Hauser H, Peters M, Mueller C, Goldschmidt JC, Blaesi B (2015)
Publication Type: Conference contribution
Publication year: 2015
Journal
Publisher: SPIE
Book Volume: 9630
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: Jena
ISBN: 9781628418194
DOI: 10.1117/12.2191316
Abstract
A large variety of optical systems incorporate multiple textured surfaces for reflectance reduction, light redirection or absorptance enhancement. One example for such a system is a textured silicon wafer solar cell. We introduce the OPTOS (Optical Properties of Textured Optical Sheets) formalism for the modelling of light propagation and absorption in optically thick sheets with two arbitrary surface textures at the front and rear side, and demonstrate applications. In contrast to many optical simulation techniques, which are tailored to specific surface morphologies, the OPTOS formalism is a matrix-based method that allows including textures that are described by different optical modelling techniques (e.g. ray optical or wave optical) within one simulation tool. It offers the computationally efficient simulation of light redistribution and non-coherent propagation inside thick sheets. After calculating redistribution matrices for each individual surface texture with the most appropriate technique, optical properties of the complete textured sheet, like e. g. angle dependent reflectance, transmittance or depth resolved absorptance, can be determined via iterative matrix multiplications (for propagation and redistribution) with low computational effort. In this work, we focus on textured wafer-based silicon solar cells as application examples for the OPTOS formalism. The simulation enables us to investigate and optimize combinations of front and rear textures on solar cells in order to increase the photocurrent generation. A solar cell with inverted pyramid front side and a diffractive grating at the rear is found to show similar light trapping properties as one with Lambertian scattering at the rear.
Involved external institutions
Albert-Ludwigs-Universität Freiburg
Germany (DE)
Fraunhofer-Institut für Solare Energiesysteme (ISE) / Fraunhofer Institute for Solar Energy Systems
Germany (DE)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
Germany (DE)
Fraunhofer-Institut für Solare Energiesysteme (ISE) / Fraunhofer Institute for Solar Energy Systems
Germany (DE)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
How to cite
APA:
Tucher, N., Eisenlohr, J., Kiefel, P., Hoehn, O., Hauser, H., Peters, M.,... Blaesi, B. (2015). Optical properties of textured sheets-an efficient matrix-based modelling approach. In Daniel G. Smith, Frank Wyrowski, Andreas Erdmann (Eds.), Proceedings of SPIE - The International Society for Optical Engineering. Jena, DE: SPIE.
MLA:
Tucher, Nico, et al. "Optical properties of textured sheets-an efficient matrix-based modelling approach." Proceedings of the Optical Systems Design 2015: Computational Optics, Jena Ed. Daniel G. Smith, Frank Wyrowski, Andreas Erdmann, SPIE, 2015.
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