Combined radial Fresnel lens: controlling the distribution of solar irradiance and the profile of the generated photocurrent in a multi-junction solar cell

N. A. Sadchikov, A. V. Andreeva

Ioffe Institute, St. Petersburg, Russia

Abstract: A solution is proposed for a Fresnel lens with a variable pitch and focus, designed for use in ground-based concentrator modules with a high degree of solar radiation concentration. Compared to a Fresnel lens with a constant pitch and focus, this approach provided a reduction in the spatial and spectral inhomogeneities of the local concentration of solar radiation in a focal spot on the surface of an InGaP/GaAs/Ge multijunction solar cell (MJSC). This made it possible to form a distribution profile of the local photocurrent density with reduced peak values at the center of the SC and a minimum difference in the values of the local photocurrent density for three photosensitive $p$–$n$ junctions over the entire surface of the MJSC.

Keywords: concentrator photovoltaic modules, Fresnel lens, multijunction solar cells.

Received: 08.09.2023
Revised: 27.09.2023
Accepted: 28.09.2023

DOI: 10.61011/PJTF.2023.22.56595.19723

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