Dresden 2014 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 81: Poster: Energy materials incl. photovoltaics

HL 81.6: Poster

Wednesday, April 2, 2014, 17:00–20:00, P1

Optimizing binary profiles for metallic solar cell back-plane reflectors — •Jan Marc Stockschläder and Erich Runge — Institut für Physik and Thüringer Landesgraduiertenschule für Photovoltaik PhotoGrad, Technische Universität Ilmenau, 98693 Ilmenau

Coupling light to the active medium of a solar cell is a crucial point for high efficiency. Structured substrates have been proposed to scatter light more efficiently into the absorber. Thin geometries are particularly attractive because they have the potential for low-cost fabrication. In acoustics, so-called Galois scatterer are often used because they scatter equally into every available scattering order[1]. However for solar cells, it matters whether scattering orders correspond to long or short path ways in the absorber. Taking this into account, we present a simple criterion as a basis for educated guesses for the absorption enhancement of a particular scattering profile. We compare the results of FDTD simulations and our heuristic estimate for Galois scatters and numerous structures of the same period length.

[1] T. J. Cox , P. D’Antonio, and M. Schroeder, Acoustic Absorbers and Diffusers: Theory, Design and Application, JASA 117, 3345 (2005)