Perovskite‐Based Hybrid Solar Cells Exceeding 10% Efficiency with High Reproducibility Using a Thin Film Sandwich Approach

Organometal halide perovskites have tremendous potential as light absorbers for photovoltaic applications. In this work we demonstrate hybrid solar cells based on the mixed perovskite CH3NH3PbI2Cl in a thin film sandwich structure, with unprecedented reproducibility and generating efficiencies up to 10.8%. The successfulness of our approach is corroborated by the experimental electronic structure determination of this perovskite. Hybrid solar cells based on organometal halide perovskites (e.g., CH3NH3PbI2Cl) as light absorbers are upcoming new players in the field of third-generation photovoltaics.1 Remarkably, this new type of solar cells has surpassed dye-sensitized and organic solar cells in terms of…