A Practical Efficiency Target for Perovskite/Silicon Tandem Solar Cells

Monolithic two-terminal (2T) perovskite/silicon tandem solar cells are rapidly progressing toward higher power conversion efficiencies (PCEs), which has led to a prominent role for this technology within the photovoltaics (PV) research community and, increasingly, in industrial PV R&D. Here, we define a practical PCE target of 37.8% for 2T perovskite/silicon tandems based on metrics derived from state-of-the-art silicon and perovskite solar cells and discuss possible pathways toward that goal. It is hoped that this PCE target will serve to guide future research directions, most notably into continued improvements in the radiative efficiency of the mixed-halide perovskite top cell via bulk and surface passivation strategies.