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Energy Express

  • Editor: Bernard Kippelen
  • Vol. 19, Iss. S4 — Jul. 4, 2011
  • pp: A875–A887

Broadband omnidirectional antireflection coatings for metal-backed solar cells optimized using simulated annealing algorithm incorporated with solar spectrum

Yin-Jung Chang and Yu-Ting Chen  »View Author Affiliations

Optics Express, Vol. 19, Issue S4, pp. A875-A887 (2011)

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Broadband omnidirectional antireflection (AR) coatings for solar cells optimized using simulated annealing (SA) algorithm incorporated with the solar (irradiance) spectrum at Earth’s surface (AM1.57 radiation) are described. Material dispersions and reflections from the planar backside metal are considered in the rigorous electromagnetic calculations. Optimized AR coatings for bulk crystalline Si and thin-film CuIn1–x Ga x Se2 (CIGS) solar cells as two representative cases are presented and the effect of solar spectrum in the AR coating designs is investigated. In general, the angle-averaged reflectance of a solar-spectrum-incorporated AR design is shown to be smaller and more uniform in the spectral range with relatively stronger solar irradiance. By incorporating the transparent conductive and buffer layers as part of the AR coating in CIGS solar cells (2μm-thick CIGS layer), a single MgF2 layer could provide an average reflectance of 8.46% for wavelengths ranging from 350 nm to 1200 nm and incident angles from 0° to 80°.

© 2011 OSA

OCIS Codes
(310.1210) Thin films : Antireflection coatings
(310.4165) Thin films : Multilayer design

ToC Category:
Thin Films

Original Manuscript: April 26, 2011
Revised Manuscript: June 8, 2011
Manuscript Accepted: June 9, 2011
Published: June 27, 2011

Yin-Jung Chang and Yu-Ting Chen, "Broadband omnidirectional antireflection coatings for metal-backed solar cells optimized using simulated annealing algorithm incorporated with solar spectrum," Opt. Express 19, A875-A887 (2011)

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