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Efficient bifacial monolithic perovskite/silicon tandem solar cells via bandgap engineering

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Efficient bifacial monolithic perovskite/silicon tandem solar cells via bandgap engineering

by Michele De Bastiani, Alessandro J. Mirabelli, Yi Hou, Fabrizio Gota, Erkan Aydin, Thomas G Allen, Joel Troughton, Anand S. Subbiah, Furkan H. Isikgor, Jiang Liu, Lujia Xu, Bin Chen, Emmanuel Van Kerschaver, Derya Baran, Beatrice Fraboni, Michael F. Salvador, Ulrich W. Paetzold, Edward H. Sargent, Stefaan De Wolf
Article Year: 2021 DOI: https://doi.org/10.1038/s41560-020-00756-8

Bibliography

De Bastiani, M., Mirabelli, A.J., Hou, Y. et al. Efficient bifacial monolithic perovskite/silicon tandem solar cells via bandgap engineering. Nat Energy (2021).

Extra Information

In this publication, which took place in Nature Energy, we investigate the influence of scattered and reflected light from the ground (albedo) on the performance of the bifacial tandems with different perovskite bandgaps.

Abstract

Bifacial monolithic perovskite/silicon tandem solar cells exploit albedo—the diffuse reflected light from the environment—to increase their performance above that of monofacial perovskite/silicon tandems. Here we report bifacial tandems with certified power conversion efficiencies >25% under monofacial AM1.5G 1 sun illumination that reach power-generation densities as high as ~26 mW cm–2 under outdoor testing. We investigated the perovskite bandgap required to attain optimized current matching under a variety of realistic illumination and albedo conditions. We then compared the properties of these bifacial tandems exposed to different albedos and provide energy yield calculations for two locations with different environmental conditions. Finally, we present a comparison of outdoor test fields of monofacial and bifacial perovskite/silicon tandems to demonstrate the added value of tandem bifaciality for locations with albedos of practical relevance.

Keywords

Materials for energy and catalysis Solar cells
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