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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S2 — Mar. 10, 2014
  • pp: A465–A480

Light trapping design for low band-gap polymer solar cells

Stephen Foster and Sajeev John  »View Author Affiliations

Optics Express, Vol. 22, Issue S2, pp. A465-A480 (2014)

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We demonstrate numerically a 2-D nanostructured design for light trapping in a low band-gap polymer solar cell. Finite element method simulations are used to study the effect of varying nanostructure periodicity, height, and shape on active layer absorption. Maintaining a constant active layer thickness of 100nm we observe an enhancement in solar absorption of almost 40% relative to a planar cell. Improvements of this magnitude enable single-junction, low-band-gap cells to achieve power conversion efficiencies of 11.2% and perform competitively with even state-of-the-art tandem cells. Our design is also shown to significantly outperform tandem cells at off-normal angles of incidence.

© 2014 Optical Society of America

OCIS Codes
(040.5350) Detectors : Photovoltaic
(050.0050) Diffraction and gratings : Diffraction and gratings
(350.6050) Other areas of optics : Solar energy
(050.5298) Diffraction and gratings : Photonic crystals

ToC Category:
Light Trapping for Photovoltaics

Original Manuscript: November 28, 2013
Revised Manuscript: February 13, 2014
Manuscript Accepted: February 15, 2014
Published: February 25, 2014

Stephen Foster and Sajeev John, "Light trapping design for low band-gap polymer solar cells," Opt. Express 22, A465-A480 (2014)

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