Ruddlesden-Popper Perovskite Solar Cells

Ruddlesden-Popper halide perovskites are now viewed as a promising avenue in perovskite solar cells in terms of both stability and high power-conversion efficiencies. We provide context to the efforts of Kanatzidis and coworkers, who, in this issue of Chem, have unveiled promising developments in the higher members of the (CH3(CH2)(3)NH3)(2)(CH3NH3)(n-1)PbnI(3n+1) series.