Spectroscopic Analysis for the Identification of Loss Mechanisms in Back-Contact Perovskite Solar Cells

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DOI http://dx.doi.org/10.1002/admt.202300241
Reference H. Sun, G.H. Gillespie, S.A. Rigter, J.S. van der Burgt, K. Datta and E.C. Garnett, Spectroscopic Analysis for the Identification of Loss Mechanisms in Back-Contact Perovskite Solar Cells, Adv. Mater. Technol. 8, (16), 2300241: 1-7 (2023)
Group Nanoscale Solar Cells

Back-contact perovskite solar cells offer a significant potential to reach high efficiency due to reduced parasitic absorption from the top surface. However, the currently reported efficiencies are considerably lower (20%). Herein, back-contact perovskite solar cells are fabricated to study loss mechanisms that cause low device efficiency. This work spatially resolves the short-circuit current, open-circuit voltage, photoluminescence quantum yield, carrier lifetime, and external quantum efficiency of the devices. The results indicate that the front surface recombination, increased nonradiative recombination at hole contact layer/perovskite interface, and the extraction barriers are three main mechanisms limiting devices from achieving high efficiencies.