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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 20, Iss. S5 — Sep. 10, 2012
  • pp: A560–A571

Combined front and back diffraction gratings for broad band light trapping in thin film solar cell

Xianqin Meng, Emmanuel Drouard, Guillaume Gomard, Romain Peretti, Alain Fave, and Christian Seassal  »View Author Affiliations


Optics Express, Vol. 20, Issue S5, pp. A560-A571 (2012)
http://dx.doi.org/10.1364/OE.20.00A560


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Abstract

In this paper, we present the integration of combined front and back 1D and 2D diffraction gratings with different periods, within thin film photovoltaic solar cells based on crystalline silicon layers. The grating structures have been designed considering both the need for incident light absorption enhancement and the technological feasibility. Long wavelength absorption is increased thanks to the long period (750 nm) back grating, while the incident light reflection is reduced by using a short period (250 nm) front grating. The simulated short circuit current in a solar cell combining a front and a back grating structures with a 1.2 µm thick c-Si layer, together with the back electrode and TCO layers, is increased up to 30.3 mA/cm2, compared to 18.4 mA/cm2 for a reference stack, as simulated using the AM1.5G solar spectrum intensity distribution from 300 nm to 1100 nm, and under normal incidence.

© 2012 OSA

OCIS Codes
(040.5350) Detectors : Photovoltaic
(040.6040) Detectors : Silicon
(050.1950) Diffraction and gratings : Diffraction gratings
(050.5298) Diffraction and gratings : Photonic crystals
(310.6845) Thin films : Thin film devices and applications

ToC Category:
Photovoltaics

History
Original Manuscript: May 11, 2012
Revised Manuscript: June 22, 2012
Manuscript Accepted: June 25, 2012
Published: July 5, 2012

Citation
Xianqin Meng, Emmanuel Drouard, Guillaume Gomard, Romain Peretti, Alain Fave, and Christian Seassal, "Combined front and back diffraction gratings for broad band light trapping in thin film solar cell," Opt. Express 20, A560-A571 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-S5-A560


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