Figure 1.

Schematic diagram of ultra-flexible PSCs device is realized by lamination of front stack structure of PEN/ITO/SnO_2/PbI₂ and back stack structure of PEN/ITO/PTAA/ammonium halide

(A–E) (A) Deposition of precursors of PbI₂, (B) front stack structure of PEN/ITO/SnO_2/PbI₂, (C) Deposition of organic cationic salts, (D) back stack structure of PEN/ITO/PTAA/ammonium halide, and (E) The perovskite crystals are formed by thermal diffusion during the lamination process, and PAM realizes the adhesion between the sub-cells. See Video S1 in supporting information for the full procedure.