Ternary solvent boosts two-dimensional perovskites

In the past few years,organic–inorganic/inorganic lead halide perovskites,most notably CH3NH3Pb I3and its mixed cation/anion compounds,have attracted tremendous research interests in a wide range of different disciplines,which is largely initialized by their unprecedented success in low-cost and highly efficient solar cells.With certified efficiencies of over 22%in the lab-scale devices,