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Proceedings Paper

Spatial and spectral non-uniform irradiance distribution effects on multijunction solar cells
Author(s): M. Victoria; R. Herrero; C. Domínguez; I. Antón; S. Askins; G. Sala
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Paper Abstract

When refractive optical systems are used to concentrate light onto high efficiency solar cells chromatic aberration creates irradiance distributions over the cells which are neither spatially nor spectrally uniform. Multijunction solar cells are the photovoltaic device with the highest conversion efficiency. However, their efficiency under a concentration system can be significantly lower than the measured efficiency under uniform irradiance and reference conditions. In this paper the irradiance distribution created by a Fresnel lens is studied by ray-tracing simulations and it is characterized using a CCD camera and adequate filters. The effects of the non uniform irradiance distribution on the solar cell performance are analyzed by measuring the IV curve of an elementary unit of the system when illuminated by a solar simulator. IV curves for different lens to cell distances are measured and compared to allow a better understanding of the system.

Paper Details

Date Published: 8 September 2011
PDF: 7 pages
Proc. SPIE 8007, Photonics North 2011, 800724 (8 September 2011);
Show Author Affiliations
M. Victoria, Univ. Politécnica de Madrid (Spain)
R. Herrero, Univ. Politécnica de Madrid (Spain)
C. Domínguez, Univ. Politécnica de Madrid (Spain)
I. Antón, Univ. Politécnica de Madrid (Spain)
S. Askins, Univ. Politécnica de Madrid (Spain)
G. Sala, Univ. Politécnica de Madrid (Spain)

Published in SPIE Proceedings Vol. 8007:
Photonics North 2011
Raman Kashyap; Michel Têtu; Rafael N. Kleiman, Editor(s)

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