Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 6, 2011
|
|
---|---|---|
Article Number | 11020 | |
Number of page(s) | 4 | |
DOI | https://doi.org/10.2971/jeos.2011.11020 | |
Published online | 25 April 2011 |
Regular papers
A novel back-side light trapping structure for thin silicon solar cells
1
Institute for Energy Technology, Department of Solar Energy, P.O. Box 40, 2027 Kjeller, Norway
2
University of Oslo, Department of Physics, P.O. Box 1048 Blindern, 0316 Oslo, Norway
3
University Graduate Center at Kjeller, P.O. Box 70, 2027 Kjeller, Norway
Received:
17
December
2010
Decreasing silicon consumption is one of the most important ways of reducing the cost of solar cells. High-quality light trapping provides the possibility of making thinner silicon solar cells without sacrificing optical efficiency. In this work we introduce an advanced bi-periodic back-side structure with promising light trapping properties. The structure combines high coupling efficiency of light to oblique travelling modes with the ability of keeping the light within the solar cell for multiple reflections between the front and the rear side. We have done numerical simulations of light trapping for normal incidence in our structure, and we show that our structure with real materials holds the potential to exceed the light trapping of an ideal Lambertian surface. We also investigate the behaviour of our light trapping structure as a function of incidence angle and state of polarization, and compare it to the Lambertian behaviour.
Key words: solar cells / light trapping / diffraction grating
© The Author(s) 2011. All rights reserved.
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