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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 25 — Dec. 7, 2009
  • pp: 23058–23065

Light trapping in thin-film silicon solar cells with submicron surface texture

Rahul Dewan, Marko Marinkovic, Rodrigo Noriega, Sujay Phadke, Alberto Salleo, and Dietmar Knipp  »View Author Affiliations

Optics Express, Vol. 17, Issue 25, pp. 23058-23065 (2009)

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The influence of nano textured front contacts on the optical wave propagation within microcrystalline thin-film silicon solar cell was investigated. Periodic triangular gratings were integrated in solar cells and the influence of the profile dimensions on the quantum efficiency and the short circuit current was studied. A Finite Difference Time Domain approach was used to rigorously solve the Maxwell’s equations in two dimensions. By studying the influence of the period and height of the triangular profile, the design of the structures were optimized to achieve higher short circuit currents and quantum efficiencies. Enhancement of the short circuit current in the blue part of the spectrum is achieved for small triangular periods (P<200 nm), whereas the short circuit current in the red and infrared part of the spectrum is increased for triangular periods (P = 900nm) comparable to the optical wavelength. The influence of the surface texture on the solar cell performance will be discussed.

© 2009 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(350.6050) Other areas of optics : Solar energy
(050.6624) Diffraction and gratings : Subwavelength structures
(310.6845) Thin films : Thin film devices and applications

ToC Category:
Solar Energy

Original Manuscript: September 9, 2009
Revised Manuscript: October 2, 2009
Manuscript Accepted: October 3, 2009
Published: December 2, 2009

Rahul Dewan, Marko Marinkovic, Rodrigo Noriega, Sujay Phadke, Alberto Salleo, and Dietmar Knipp, "Light trapping in thin-film silicon solar cells with submicron surface texture," Opt. Express 17, 23058-23065 (2009)

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