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HL: Fachverband Halbleiterphysik

HL 85: Poster Session II

HL 85.71: Poster

Donnerstag, 17. März 2011, 18:00–21:00, P4

Semi-coherent optical modelling of thin film silicon solar cells — •Cordula Walder, Jürgen Lacombe, Karsten von Maydell, and Carsten Agert — NEXT ENERGY, EWE-Forschungszentrum für Energietechnologie e.V., Carl-von-Ossietzky-Straße 15, 26129 Oldenburg, Germany

At NEXT ENERGY the experimental investigation of thin film silicon solar cells is combined with numerical simulations using the software Sentaurus TCAD from Synopsys. We present the results of optical modelling with Sentaurus TCAD based on the one-dimensional semi-coherent optical model by Janez Krč [1]. The idea of this model is that after interacting with a rough interface the incident light is split into a direct coherent part treated as electromagnetic waves and in a diffuse incoherent part treated as light beams. The proportion of either direct or diffuse part is determined by the haze parameter which can be obtained from spectrometer data. In order to describe the scattering effects at rough interfaces the intensities of the diffuse light are scaled with angular distribution functions. These functions are obtained from angle resolved scattering measurements.

The optical model will be verified by experimental data and compared to the Raytracer and the Transfer Matrix Model. Furthermore the influence of different angles of incidence and of the spectral dependency on the solar cell performance will be investigated.

[1] J. Krč, F. Smole, M. Topič. One-dimensional semi-coherent optical model for thin-film solar cells with rough interfaces. Informacije MIDEM 2002; 32(1): 6-13.