Characterization of solar cells using electroluminescence and photoluminescence hyperspectral images

Amaury Delamarre; Laurent Lombez; Jean-Francois Guillemoles

doi:10.1117/1.JPE.2.027004

17 July 2012 Characterization of solar cells using electroluminescence and photoluminescence hyperspectral images

Amaury Delamarre, Laurent Lombez, Jean-Francois Guillemoles

Author Affiliations +

Journal of Photonics for Energy, Vol. 2, Issue 1, 027004 (July 2012). https://doi.org/10.1117/1.JPE.2.027004

Abstract

We analyze photoluminescence (PL) and electroluminescence (EL) of a GaAs solar cell using a hyperspectral imager that records spectrally resolved images. Thanks to the absolute calibration of the setup, we first investigate the reciprocity relations between solar cells and light-emitting diode and determine the external quantum efficiency from EL images. Spatial variations are observed due to series resistance effect that we can evaluate. Second, the PL experiment allows us to plot the recombination current at a given spatial location versus the quasi-Fermi level splitting at the same location. Under reasonable assumptions, this can be linked to the classical measurement of the short circuit current versus the open circuit voltage. Therefore we perform a contactless mapping of optoelectronic properties such as the saturation currents. The assumptions made in these experiments are discussed in order to correctly investigate polycrystalline solar cells in the future where strong lateral variations exist.

Citation Download Citation

Amaury Delamarre, Laurent Lombez, and Jean-Francois Guillemoles "Characterization of solar cells using electroluminescence and photoluminescence hyperspectral images," Journal of Photonics for Energy 2(1), 027004 (17 July 2012). https://doi.org/10.1117/1.JPE.2.027004

Published: 17 July 2012

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