Absorption enhancement using photonic crystals for silicon thin film solar cells

Yeonsang Park, Emmanuel Drouard, Ounsi El Daif, Xavier Letartre, Pierre Viktorovitch, Alain Fave, Anne Kaminski, Mustapha Lemiti, Christian Seassal

Research output: Contribution to journalArticle

176 Citations (Scopus)


We propose a design that increases significantly the absorption of a thin layer of absorbing material such as amorphous silicon. This is achieved by patterning a one-dimensional photonic crystal (1DPC) in this layer. Indeed, by coupling the incident light into slow Bloch modes of the 1DPC, we can control the photon lifetime and then, enhance the absorption integrated over the whole solar spectrum. Optimal parameters of the 1DPC maximize the integrated absorption in the wavelength range of interest, up to 45% in both S and P polarization states instead of 33% for the unpatterned, 100 nm thick amorphous silicon layer. Moreover, the absorption is tolerant with respect to fabrication errors, and remains relatively stable if the angle of incidence is changed.

Original languageEnglish
Pages (from-to)14312-14321
Number of pages10
JournalOptics Express
Issue number16
Publication statusPublished - 3 Aug 2009
Externally publishedYes


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Park, Y., Drouard, E., Daif, O. E., Letartre, X., Viktorovitch, P., Fave, A., Kaminski, A., Lemiti, M., & Seassal, C. (2009). Absorption enhancement using photonic crystals for silicon thin film solar cells. Optics Express, 17(16), 14312-14321. https://doi.org/10.1364/OE.17.014312