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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 21, Iss. S2 — Mar. 11, 2013
  • pp: A295–A304

Nanoimprinted diffraction gratings for crystalline silicon solar cells: implementation, characterization and simulation

Alexander Mellor, Hubert Hauser, Christine Wellens, Jan Benick, Johannes Eisenlohr, Marius Peters, Aron Guttowski, Ignacio Tobías, Antonio Martí, Antonio Luque, and Benedikt Bläsi  »View Author Affiliations


Optics Express, Vol. 21, Issue S2, pp. A295-A304 (2013)
http://dx.doi.org/10.1364/OE.21.00A295


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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, electro-optical simulations are performed of solar cells employing the fabricated grating structures to estimate efficiency enhancement potential.

© 2013 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(050.1950) Diffraction and gratings : Diffraction gratings

ToC Category:
Photovoltaics

History
Original Manuscript: December 5, 2012
Manuscript Accepted: January 21, 2013
Published: February 27, 2013

Citation
Alexander Mellor, Hubert Hauser, Christine Wellens, Jan Benick, Johannes Eisenlohr, Marius Peters, Aron Guttowski, Ignacio Tobías, Antonio Martí, Antonio Luque, and Benedikt Bläsi, "Nanoimprinted diffraction gratings for crystalline silicon solar cells: implementation, characterization and simulation," Opt. Express 21, A295-A304 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-S2-A295


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