(Invited) All Inorganic Metal Halide Perovskite Solar Cells

Abstract

Metal halide perovskite solar cells have attracted great attention because of their excellent properties such as high absorption coefficient, small exciton binding energy, convenient bandgap tunability, long charge carrier’s diffusion length, and solution processability. Owing to the intensive studies, to date their record efficiency reached to 25.2 % at 1 sun condition. However, the organic/inorganic hybrid metal halide perovskite solar cells have intrinsically weak stabilities against moisture and heat. Therefore, all inorganic metal halide perovskite materials have been of great interest because they exhibit better thermal stability than the hybrid perovskite materials even though they have wider bandgap than the hybrid perovskite materials. Therefore, it is still challenging to improve the efficiency of all inorganic metal halide perovskite solar cells to find commercial applications. Here, we would like to share recent progress of all inorganic metal halide perovskite solar cells.