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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 9 — Apr. 27, 2009
  • pp: 7505–7518

Global optimization of silicon photovoltaic cell front coatings

Michael Ghebrebrhan, Peter Bermel, Yehuda Avniel, John D. Joannopoulos, and Steven G. Johnson  »View Author Affiliations


Optics Express, Vol. 17, Issue 9, pp. 7505-7518 (2009)
http://dx.doi.org/10.1364/OE.17.007505


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Abstract

The front-coating (FC) of a solar cell controls its efficiency, determining admission of light into the absorbing material and potentially trapping light to enhance thin absorbers. Single-layer FC designs are well known, especially for thick absorbers where their only purpose is to reduce reflections. Multilayer FCs could improve performance, but require global optimization to design. For narrow bandwidths, one can always achieve nearly 100% absorption. For the entire solar bandwidth, however, a second FC layer improves performance by 6.1% for 256 μm wafer-based cells, or by 3.6% for 2 μm thin-film cells, while additional layers yield rapidly diminishing returns.

© 2009 Optical Society of America

OCIS Codes
(350.6050) Other areas of optics : Solar energy
(230.5298) Optical devices : Photonic crystals

ToC Category:
Photonic Crystals

History
Original Manuscript: February 10, 2009
Revised Manuscript: March 20, 2009
Manuscript Accepted: March 21, 2009
Published: April 22, 2009

Citation
Michael Ghebrebrhan, Peter Bermel, Yehuda Avniel, John D. Joannopoulos, and Steven G. Johnson, "Global optimization of silicon photovoltaic cell front coatings," Opt. Express 17, 7505-7518 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-9-7505


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