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Proceedings Paper

Understanding CIGS device performances through photoreflectance spectroscopy
Author(s): Antonin Moreau; David Fuertes-Marron; Irene Artacho; Ludovic Escoubas; Jean-Jacques Simon; Carmen M. Ruiz; Veronica Bermudez
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Paper Abstract

Cu(In1-x,Gax)S2 was studied using photoreflectance spectroscopy. In this study, efforts are devoted to optimizing PR set-up for measuring CIGS grown by electrodeposition: issues such as photoluminescence perturbation, high roughness and scattering are addressed. Dual frequency photoreflectance, where both probe and pump beams are modulated, is proposed here to over come the poor signal to noise ratio. Considering the low electric field regime, material parameters are extracted by employing the third derivative functional form of dielectric functions to fit data. The reliability of the technique is finally tested by measuring PR spectra on a specific 15 x 15 cm2 wafer and explanations of PR line-shape evolution on this wafer are discussed.

Paper Details

Date Published: 10 October 2012
PDF: 7 pages
Proc. SPIE 8470, Thin Film Solar Technology IV, 84700L (10 October 2012); doi: 10.1117/12.929784
Show Author Affiliations
Antonin Moreau, IM2NP, CNRS, Aix-Marseille Univ. (France)
NEXCIS, Photovoltaic Technology Rousset (France)
David Fuertes-Marron, Technical Univ. of Madrid (Spain)
Irene Artacho, Technical Univ. of Madrid (Spain)
Ludovic Escoubas, IM2NP, CNRS, Aix-Marseille Univ. (France)
Jean-Jacques Simon, IM2NP, CNRS, Aix-Marseille Univ. (France)
Carmen M. Ruiz, IM2NP, CNRS, Aix-Marseille Univ. (France)
NEXCIS, Photovoltaic Technology Rousset (France)
Veronica Bermudez, NEXCIS, Photovoltaic Technology Rousset (France)

Published in SPIE Proceedings Vol. 8470:
Thin Film Solar Technology IV
Louay A. Eldada, Editor(s)

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