Strategies toward Highly Efficient Monolithic Perovskite/Organic Tandem Solar Cells

Comprehensive Summary Constructing monolithic tandem solar cells (TSCs) is an effective method to break the Shockley–Queisser (S–Q) radiative efficiency limit for single‐junction solar cells. Employing the wide bandgap perovskite materials and low bandgap organic materials as absorber layers for front and rear subcells, respectively, to construct perovskite/organic TSCs can complementarily absorb sunlight in ultraviolet‐visible (UV‐Vis) range by front perovskite and near‐infrared (NIR) range by rear organic molecules, thus reducing the thermalization energy losses. Besides the subcells, the interconnection layer (ICL), which physically and electrically connects the front and rear subcells, is also an important tunnel junction to recombine charges. In this review, we summarize the optimization strategies of wide bandgap perovskites for front subcell, narrow bandgap organic material for rear subcell, and the ICLs employed in monolithic perovskite/organic TSCs. Constructing monolithic tandem solar cells (TSCs) is an effective method to break the Shockley–Queisser (S–Q) radiative efficiency limit for single‐junction solar cells. Here, we summarize the current progresses in monolithic perovskite/organic TSCs. The front subcell based on wide bandgap mixed halide perovskites, rear subcell based on low bandgap organic molecules and the interconnection layer (ICL) are discussed, respectively, which aims to open a pathway to realize highly efficient monolithic perovskite/organic tandem device.