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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 20, Iss. S1 — Jan. 2, 2012
  • pp: A39–A50

Comparing plasmonic and dielectric gratings for absorption enhancement in thin-film organic solar cells

Khai Q. Le, Aimi Abass, Bjorn Maes, Peter Bienstman, and Andrea Alù  »View Author Affiliations


Optics Express, Vol. 20, Issue S1, pp. A39-A50 (2012)
http://dx.doi.org/10.1364/OE.20.000A39


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Abstract

We theoretically investigate and compare the influence of square silver gratings and one-dimensional photonic crystal (1D PC) based nanostructures on the light absorption of organic solar cells with a thin active layer. We show that, by integrating the grating inside the active layer, excited localized surface plasmon modes may cause strong field enhancement at the interface between the grating and the active layer, which results in broadband absorption enhancement of up to 23.4%. Apart from using silver gratings, we show that patterning a 1D PC on top of the device may also result in a comparable broadband absorption enhancement of 18.9%. The enhancement is due to light scattering of the 1D PC, coupling the incoming light into 1D PC Bloch and surface plasmon resonance modes.

© 2011 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:
Photovoltaics

History
Original Manuscript: October 6, 2011
Revised Manuscript: November 2, 2011
Manuscript Accepted: November 4, 2011
Published: November 28, 2011

Citation
Khai Q. Le, Aimi Abass, Bjorn Maes, Peter Bienstman, and Andrea Alù, "Comparing plasmonic and dielectric gratings for absorption enhancement in thin-film organic solar cells," Opt. Express 20, A39-A50 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-S1-A39


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