Photovoltaic Materials, Devices, and Technologies

Characterization of solar cells using electroluminescence and photoluminescence hyperspectral images

[+] Author Affiliations
Amaury Delamarre, Laurent Lombez, Jean-François Guillemoles

IRDEP Institute of Research and Development on Photovoltaic Energy, UMR 7174 CNRS EDF R&D Chimie ParisTech, 6 quai Watier, 78401 Chatou Cedex, France

J. Photon. Energy. 2(1), 027004 (Jul 17, 2012). doi:10.1117/1.JPE.2.027004
History: Received April 16, 2012; Revised May 31, 2012; Accepted June 26, 2012
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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.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Amaury Delamarre ; Laurent Lombez and Jean-François Guillemoles
"Characterization of solar cells using electroluminescence and photoluminescence hyperspectral images", J. Photon. Energy. 2(1), 027004 (Jul 17, 2012). ; http://dx.doi.org/10.1117/1.JPE.2.027004


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