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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 20, Iss. S1 — Jan. 2, 2012
  • pp: A104–A118

Surface plasmon effects in the absorption enhancements of amorphous silicon solar cells with periodical metal nanowall and nanopillar structures

Hung-Yu Lin, Yang Kuo, Cheng-Yuan Liao, C. C. Yang, and Yean-Woei Kiang  »View Author Affiliations

Optics Express, Vol. 20, Issue S1, pp. A104-A118 (2012)

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The authors numerically investigate the absorption enhancement of an amorphous Si solar cell, in which a periodical one-dimensional nanowall or two-dimensional nanopillar structure of the Ag back-reflector is fabricated such that a dome-shaped grating geometry is formed after Si deposition and indium-tin-oxide coating. In this investigation, the effects of surface plasmon (SP) interaction in such a metal nanostructure are of major concern. Absorption enhancement in most of the solar spectral range of significant amorphous Si absorption (320-800 nm) is observed in a grating solar cell. In the short-wavelength range of high amorphous Si absorption, the weakly wavelength-dependent absorption enhancement is mainly caused by the broadband anti-reflection effect, which is produced through the surface nano-grating structures. In the long-wavelength range of diminishing amorphous Si absorption, the highly wavelength-sensitive absorption enhancement is mainly caused by Fabry-Perot resonance and SP interaction. The SP interaction includes the contributions of surface plasmon polariton and localized surface plasmon.

© 2011 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(350.6050) Other areas of optics : Solar energy

ToC Category:

Original Manuscript: September 8, 2011
Revised Manuscript: December 9, 2011
Manuscript Accepted: December 10, 2011
Published: December 21, 2011

Hung-Yu Lin, Yang Kuo, Cheng-Yuan Liao, C. C. Yang, and Yean-Woei Kiang, "Surface plasmon effects in the absorption enhancements of amorphous silicon solar cells with periodical metal nanowall and nanopillar structures," Opt. Express 20, A104-A118 (2012)

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