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  4. Nanoimprinted diffraction gratings for crystalline silicon solar cells
 
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2013
  • Zeitschriftenaufsatz

Titel

Nanoimprinted diffraction gratings for crystalline silicon solar cells

Titel Supplements
Implementation, characterization and simulation
Abstract
Light trapping is becoming of increasing importance in crystalline silicon solar cells as thinner wafers are used to reduce costs. In this work, we report on light trapping by rear-side diffraction gratings produced by nano-imprint lithography using interference lithography as the mastering technology. Gratings fabricated on crystalline silicon wafers are shown to provide significant absorption enhancements. Through a combination of optical measurement and simulation, it is shown that the crossed grating provides better absorption enhancement than the linear grating, and that the parasitic reflector absorption is reduced by planarizing the rear reflector, leading to an increase in the useful absorption in the silicon. Finally, electrooptical simulations are performed of solar cells employing the fabricated grating structures to estimate efficiency enhancement potential.
Author(s)
Mellor, A.
Hauser, H.
Wellens, C.
Benick, J.
Eisenlohr, J.
Peters, M.
Guttowski, A.
Tobias, I.
Marti, A.
Luque, A.
Bläsi, B.
Zeitschrift
Optics Express
Funder
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
DOI
10.1364/OE.21.00A295
File(s)
N-241877.pdf (3.03 MB)
Language
Englisch
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Tags
  • Solarthermie und Opti...

  • Silicium-Photovoltaik...

  • Angewandte Optik und ...

  • Kristalline Silicium-...

  • Mikrostrukturierte Ob...

  • Industrielle und neua...

  • trapping

  • Nanoimprint

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