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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 9 — Apr. 23, 2012
  • pp: 9458–9464

Triangular metallic gratings for large absorption enhancement in thin film Si solar cells

Enes Battal, Taha Alper Yogurt, Levent Erdal Aygun, and Ali K. Okyay  »View Author Affiliations


Optics Express, Vol. 20, Issue 9, pp. 9458-9464 (2012)
http://dx.doi.org/10.1364/OE.20.009458


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Abstract

We estimate high optical absorption in silicon thin film photovoltaic devices using triangular corrugations on the back metallic contact. We computationally show 21.9% overall absorptivity in a 100-nm-thick silicon layer, exceeding any reported absorptivity using single layer gratings placed on the top or the bottom, considering both transverse electric and transverse magnetic polarizations and a wide spectral range (280 – 1100 nm). We also show that the overall absorptivity of the proposed scheme is relatively insensitive to light polarization and the angle of incidence. We also discuss the implications of potential fabrication process variations on such a device.

© 2012 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(050.2770) Diffraction and gratings : Gratings
(240.6680) Optics at surfaces : Surface plasmons
(350.6050) Other areas of optics : Solar energy
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Solar Energy

History
Original Manuscript: November 22, 2011
Revised Manuscript: March 26, 2012
Manuscript Accepted: March 30, 2012
Published: April 10, 2012

Citation
Enes Battal, Taha Alper Yogurt, Levent Erdal Aygun, and Ali K. Okyay, "Triangular metallic gratings for large absorption enhancement in thin film Si solar cells," Opt. Express 20, 9458-9464 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-9-9458


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