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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )

O 36.7: Poster

Dienstag, 12. März 2013, 18:15–21:45, Poster B2

Impact of 2D structures on the back surface of solar cells on the absorption processes in these cells — •Jan Marc Stockschläder¹, Michael Jaax², Henning Fouckhardt², and Erich Runge¹ — ¹TU Ilmenau, 98693 Ilmenau, Germany — ²TU Kaiserslautern, 67663 Kaiserslautern, Germany

Coupling light to the active medium of a solar cell is a crucial point for high efficiency. Therefore, structured substrates are studied to enhance the light matter coupling. Especially thin geometries are attractive because they have the potential to be fabricated low-cost. We present a 2D periodic structure based on the 1D double-periodic structures of Williamson et al. [1] as they already showed good surface-plasmon coupling capabilities. Furthermore, we analyse a structure based on Galois fields, which scatters incoming waves over a huge solid angle. This concept is well known for acoustic waves [2] and has recently been realized for the optical wavelength regime by M. Jaax et al. [3]. We show the yield enhancement as a substrate structure for solar cells.

[1] A. Williamson, E. McClean, D. Leipold, D. Zerulla, and E. Runge, The design of efficient surface-plasmon-enhanced ultra-thin polymer-based solar cells (APL 99, 093307)

[2] T. J. Cox , P. D’Antonio, and Manfred Schroeder, Acoustic Absorbers and Diffusers, Theory, design and application (JASA 117,3)

[3] M. Jaax, S. Wolf, B. Lägel, and H. Fouckhardt, Optical reflective Galois scattering plates, Presented at EOS Annual Meeting 2012, Aberdeen; (submitted to JEOS)