Original Research ARTICLE
Effect of the irradiation on optical and electrical properties of triple-junction flexible thin solar cells for space applications
- 1University of Milano Bicocca, Italy
- 2Other, Italy
The most common multijunction solar cell arrangement employs the InGaP/InGaAs/Ge configuration,
which is usually exploited for high-efficiency space applications. We here test the reliability of
a triple-junction device with an innovative low-thickness and flexible configuration: this is investigation
is aimed at providing its main macroscopic features which must be taken into account for their
applications. Notably, the specific optical and electrical features and the performance variation of
these thin solar cells are systematically analyzed, both in begin-of-life (BOL) configuration and after
irradiation (end-of-life, EOL) by either electrons or protons. Measurements of I-V curves, with
correlated parameters, and of spectral responses (external quantum efficiency) are accomplished on
several BOL and EOL samples: this allows to describe the inhomogeneous damage of the subjunctions
and to follow the evolution of the solar cell physical quantities as a function of the kind and the
amount of irradiation. Finally, photoluminescence emission spectra are measured, pointing out the
effect of particle bombardment on luminescent features. Our results show that these innovative solar
devices allow for the combination of high specific power, mechanical flexibility, high performance,
and strong resistance to particle irradiation, making them an excellent option for space applications.
Keywords: multijunction cells, irradiated cells, III-V semiconductors, Space solar cells, flexible cells
Received: 09 Jul 2019;
Accepted: 11 Oct 2019.
Copyright: © 2019 Parravicini, Arcadi, Le Donne, Campesato, Casale, Greco and Binetti. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Prof. Simona Binetti, University of Milano Bicocca, Milan, 20126, Lombardy, Italy, firstname.lastname@example.org