Photovoltaic Properties of Perovskite-Silicon Hybrid Solar Cells: A Strategy to Achieve Perovskite-Based Tandem Cells

Planar combination of perovskite-silicon solar cell was realized and photovoltaic performance was characterized. The overall efficiency exceeding 4.1% was achieved by using perovskite (230 nm in thickness) and nanocrystalline Si cells with efficiencies of 10.5 and 3.8%, respectively, resulting from higher open-circuit voltage and fill factor. The external quantum efficiency of the silicon solar cell that was unfiltered or filtered with perovskite layer exhibited that power matching is of great importance to achieve a high efficiency. Moreover, the change in the thickness of perovskite layer impacted on the overall hybrid cell efficiency, which also implying the importance of power matching issue. This study experimentally demonstrates the possibility of perovskite-based tandem cells and the strategy to achieve a high efficiency of tandem cell.