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Energy Express

Energy Express

  • Editor: Christian Seassal
  • Vol. 22, Iss. S4 — Jun. 30, 2014
  • pp: A1174–A1189

Light trapping in ZnO nanowire arrays covered with an absorbing shell for solar cells

Jérôme Michallon, Davide Bucci, Alain Morand, Mauro Zanuccoli, Vincent Consonni, and Anne Kaminski-Cachopo  »View Author Affiliations

Optics Express, Vol. 22, Issue S4, pp. A1174-A1189 (2014)

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The absorption properties of ZnO nanowire arrays covered with a semiconducting absorbing shell for extremely thin absorber solar cells are theoretically investigated by optical computations of the ideal short-circuit current density with three-dimensional rigorous coupled wave analysis. The effects of nanowire geometrical dimensions on the light trapping and absorption properties are reported through a comprehensive optical mode analysis. It is shown that the high absorptance of these heterostructures is driven by two different regimes originating from the combination of individual nanowire effects and nanowire arrangement effects. In the short wavelength regime, the absorptance is likely dominated by optical modes efficiently coupled with the incident light and interacting with the nearby nanowires (i.e. diffraction), induced by the period of core shell ZnO nanowire arrays. In contrast, in the long wavelength regime, the absorptance is governed by key optically guided modes, related to the diameter of individual core shell ZnO nanowires.

© 2014 Optical Society of America

OCIS Codes
(040.5350) Detectors : Photovoltaic
(050.0050) Diffraction and gratings : Diffraction and gratings
(310.2790) Thin films : Guided waves
(350.6050) Other areas of optics : Solar energy
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Light Trapping for Photovoltaics

Original Manuscript: January 17, 2014
Revised Manuscript: April 1, 2014
Manuscript Accepted: May 14, 2014
Published: June 19, 2014

Jérôme Michallon, Davide Bucci, Alain Morand, Mauro Zanuccoli, Vincent Consonni, and Anne Kaminski-Cachopo, "Light trapping in ZnO nanowire arrays covered with an absorbing shell for solar cells," Opt. Express 22, A1174-A1189 (2014)

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