• Tillmann, P.; Jäger, K.; Katz, E.A.; Becker, C.: Relaxed current-matching constraints by bifacial operation and luminescent coupling in perovskite/silicon tandem solar cells. In: 48th IEEE Photovoltaic Specialists Conference, PVSC 2021 : Fort Lauderdale, Florida, USA, 20 – 25 June 2021, online. Piscataway, NJ: IEEE, 2021. - ISBN 978-1-6654-3018-0, p. 1086-1088

10.1109/pvsc43889.2021.9518891

Abstract:
Bifacial and multi-junction solar cells are two approaches to increase the power output of market-dominating silicon solar cells. In this work we investigate how the power output of perovskite/silicon tandem solar cells depends on the top-cell bandgap by modeling monofacial and bifacial operation considering the effect of luminescent coupling. Operating a bifacial tandem in realistic illumination scenarios shifts the optimal perovskite bandgap by around −0.1 eV. Luminescent coupling can further reduce the impact of below optimum top cell bandgaps. Considering both effects may change the targeted bandgap of of optimal perovskite materials for tandem solar cells.