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Proceedings Paper

Optimized absorption of solar radiations in nano-structured thin films of crystalline silicon via a genetic algorithm
Author(s): Alexandre Mayer; Jérôme Muller; Aline Herman; Olivier Deparis
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Paper Abstract

We developed a genetic algorithm to achieve optimal absorption of solar radiation in nano-structured thin films of crystalline silicon (c-Si) for applications in photovoltaics. The device includes on the front side a periodic array of inverted pyramids, with conformal passivation layer (a-Si:H or AlOx) and anti-reflection coating (SiNx). The device also includes on the back side a passivation layer (a-Si:H) and a flat reflector (ITO and Ag). The geometrical parameters of the inverted pyramids as well as the thickness of the different layers must be adjusted in order to maximize the absorption of solar radiations in the c-Si. The genetic algorithm enables the determination of optimal solutions that lead to high performances by evaluating only a reduced number of parameter combinations. The results achieved by the genetic algorithm for a 40μm thick c-Si lead to short-circuit currents of 37 mA/cm2 when a-Si:H is used for the front-side passivation and 39.1 mA/cm2 when transparent AlOx is used instead.

Paper Details

Date Published: 31 August 2015
PDF: 10 pages
Proc. SPIE 9546, Active Photonic Materials VII, 95461N (31 August 2015); doi: 10.1117/12.2185672
Show Author Affiliations
Alexandre Mayer, Univ. of Namur (Belgium)
Jérôme Muller, Univ. of Namur (Belgium)
Aline Herman, Univ. of Namur (Belgium)
Olivier Deparis, Univ. of Namur (Belgium)

Published in SPIE Proceedings Vol. 9546:
Active Photonic Materials VII
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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