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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S5 — Aug. 25, 2014
  • pp: A1229–A1236

Light trapping efficiency of organic solar cells with large period photonic crystals

Léo Peres, Valérie Vigneras, and Sophie Fasquel  »View Author Affiliations

Optics Express, Vol. 22, Issue S5, pp. A1229-A1236 (2014)

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We study the optical properties of a 2D Photonic Crystal (PC) inserted in the upper ITO electrode of a classical P3HT:PCBM solar architecture with an ultra-thin active layer. First, we analyze the optical response of the system when only the active layer is supposed to absorb light. This allows us to observe clear photonic crystal resonances in the absorption spectrum, which increase the cell efficiency even if the period of the PC is higher than the wavelength. This is in apparent contradiction with the common belief that PC should work in subwavelength regime. Then, by turning to a real system (with optical losses in all the layers), an optimized PC design is proposed, where the maximum of efficiency is obtained for a PC period of 1200 nm, much larger than visible wavelength.

© 2014 Optical Society of America

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

ToC Category:
Light Trapping for Photovoltaics

Original Manuscript: March 20, 2014
Revised Manuscript: May 16, 2014
Manuscript Accepted: May 16, 2014
Published: July 10, 2014

Léo Peres, Valérie Vigneras, and Sophie Fasquel, "Light trapping efficiency of organic solar cells with large period photonic crystals," Opt. Express 22, A1229-A1236 (2014)

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