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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 17 — Sep. 1, 2013
  • pp: 3257–3260

Toward maximum transmittance into absorption layers in solar cells: investigation of lossy-film-induced mismatches between reflectance and transmittance extrema

Yin-Jung Chang and Chi-Sheng Lai  »View Author Affiliations


Optics Letters, Vol. 38, Issue 17, pp. 3257-3260 (2013)
http://dx.doi.org/10.1364/OL.38.003257


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Abstract

The mismatch in film thickness and incident angle between reflectance and transmittance extrema due to the presence of lossy film(s) is investigated toward the maximum transmittance design in the active region of solar cells. Using a planar air/lossy film/silicon double-interface geometry illustrates important and quite opposite mismatch behaviors associated with TE and TM waves. In a typical thin-film CIGS solar cell, mismatches contributed by TM waves in general dominate. The angular mismatch is at least 10° in about 37%–53% of the spectrum, depending on the thickness combination of all lossy interlayers. The largest thickness mismatch of a specific interlayer generally increases with the thickness of the layer itself. Antireflection coating designs for solar cells should therefore be optimized in terms of the maximum transmittance into the active region, even if the corresponding reflectance is not at its minimum.

© 2013 Optical Society of America

OCIS Codes
(310.1210) Thin films : Antireflection coatings
(310.6860) Thin films : Thin films, optical properties
(350.6050) Other areas of optics : Solar energy

ToC Category:
Thin Films

History
Original Manuscript: June 11, 2013
Manuscript Accepted: July 23, 2013
Published: August 20, 2013

Citation
Yin-Jung Chang and Chi-Sheng Lai, "Toward maximum transmittance into absorption layers in solar cells: investigation of lossy-film-induced mismatches between reflectance and transmittance extrema," Opt. Lett. 38, 3257-3260 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-17-3257


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