OSA's Digital Library

Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 20 — Oct. 15, 2012
  • pp: 4230–4232

Optimization of slow light one-dimensional Bragg structures forphotocurrent enhancement in solar cells

Olivier Deparis and Ounsi El Daif  »View Author Affiliations

Optics Letters, Vol. 37, Issue 20, pp. 4230-4232 (2012)

View Full Text Article

Enhanced HTML    Acrobat PDF (372 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



In 1D photonic crystal Bragg structures, strong localization of the light occurs in the high refractive index layers at wavelengths on the red edge of the photonic bandgap. We exploit this slow light effect for thin film solar cells in order to increase the absorption of light in silicon, as the latter has a high refractive index. Amorphous silicon and a transparent conductive oxide are chosen as high-index and low-index materials, respectively. Reference thin film cells have equivalent total thickness of amorphous silicon, plus antireflection coating and optional metallic back mirror. Through transfer-matrix calculations, we demonstrate that the spectrally integrated photon flux absorbed in active layers, hence the photocurrent, is enhanced by at least 10% with respect to reference using only a few periods. The enhancement is robust with respect to the light incidence angle. The key of such an enhancement is the tuning of the red edge to both the solar irradiance spectrum and the intrinsic material absorption spectrum, which is achieved by suitably selecting the layer thicknesses.

© 2012 Optical Society of America

OCIS Codes
(230.4170) Optical devices : Multilayers
(350.6050) Other areas of optics : Solar energy
(050.5298) Diffraction and gratings : Photonic crystals
(310.6805) Thin films : Theory and design

ToC Category:
Solar Energy

Original Manuscript: August 31, 2012
Manuscript Accepted: August 31, 2012
Published: October 5, 2012

Olivier Deparis and Ounsi El Daif, "Optimization of slow light one-dimensional Bragg structures forphotocurrent enhancement in solar cells," Opt. Lett. 37, 4230-4232 (2012)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. S. Basu Mallick, N. P. Sergeant, M. Agrawal, J.-Y. Lee, and P. Peumans, MRS Bull. 36, 453 (2011).. [CrossRef]
  2. O. El Daif, E. Drouard, G. Gomard, A. Kaminski, A. Fave, M. Lemiti, S. Ahn, S. Kim, P. Roca i Cabarrocas, H. Jeon, and C. Seassal, Opt. Express 18, A293 (2010). [CrossRef]
  3. S. Schaefer and R. Lüdemann, J. Vac. Sci. Technol. A 17, 749 (1999). [CrossRef]
  4. J. D. Joannopoulos, R. D. Meade, and J. N. Winn, Photonic Crystals: Molding the Flow of Light (Princeton, 1995).
  5. I. Kuzma-Filipek, F. Duerinckx, E. Van Kerschaver, K. Van Nieuwenhuysen, G. Beaucarne, and J. Poortmans, J. Appl. Phys. 104, 073529 (2008). [CrossRef]
  6. X. Meng, G. Gomard, O. El Daif, E. Drouard, R. Orobtchouk, A. Kaminski, A. Fave, M. Lemiti, A. Abramov, P. Roca i Cabarrocas, and C. Seassal, Solar Energy Mater. Solar Cells 95, S32 (2011). [CrossRef]
  7. P. Yeh, Optical Waves in Layered Media, 2nd ed. (Wiley, 2005).
  8. O. Deparis, Opt. Lett. 36, 3960 (2011). [CrossRef]
  9. M. Izzi, L. Serenelli, M. Tucci, M. Della Noce, I. Usatii, L. V. Mercaldo, and P. Delli Veneri, in Photovoltaic Technical Conference (ARCSIS, 2012).
  10. J. Poortmans and V. Arkhipov, Thin Film Solar Cells: Fabrication, Characterization and Applications (Wiley, 2006).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1. Fig. 2. Fig. 3.
Fig. 4.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited