Thermal Shock Fabrication of Ion‐Stabilized Perovskite and Solar Cells
Yifei Kang, Anran Wang, Rong Li, Yilong Song, Xinjiang Wang, Hanming Li, Weiqing Xu, Lijun Zhang, Qingfeng Dong
Abstract
Abstract A highly crystalline tempered‐glass‐like perovskite grain structure with compressed surface lattice realized by a thermal‐shocking fabrication is shown. The strained perovskite grain structure is stabilized by Cl − ‐reinforcing surface lattice and shows enhanced bonding energy and ionic activation temperature, which contributes to hysteresis‐free operation of perovskite solar cells (PSCs) at much higher temperature up to 363 K in thermal‐shocking‐processed MAPbCl x I 3− x (T‐MPI). The PSCs can be fabricated by a high‐speed fully air process without post‐annealing based on the scalable bar‐coating technique. Both high efficiency and stability are achieved in T‐MPI PSC with a power conversion efficiency (PCE) up to 22.99% and long‐term operational stability with T 80 lifetime exceeding 4000 h.