Dual‐Phase CsPbBr₃–CsPb₂Br₅ Perovskite Thin Films via Vapor Deposition for High‐Performance Rigid and Flexible Photodetectors

provides satisfactory passivation to reduce the recombination of the charge carriers, and with its lower free energy, it enhances the stability of the inorganic perovskite devices. Remarkably, the same inorganic perovskite photodetector is also highly flexible and exhibits an exceptional bending performance (>1000 cycles). These results highlight the great potential of dual-phase inorganic perovskite films in the development of optoelectronic devices, especially for flexible device applications.