All-inorganic halide perovskites for air-processed “n–i–p” monolithic perovskite/organic hybrid tandem solar cells exceeding 23% efficiency

We are excited to report dynamic hot-air assisted ambient conditions processed metal ion-doped γ-CsPb(I 1− x Br x ) 3 ( E g = 1.87 eV) wide bandgap in combination with a ternary bulk-heterojunction ( E g = 1.36 eV) narrow bandgap based monolithic hybrid tandem solar cells crossing 23% efficiency.