Superior Photodetectors Based on All-Inorganic Perovskite CsPbI₃ Nanorods with Ultrafast Response and High Stability

Currently, one-dimensional all-inorganic CsPbX 3 (X = Br, Cl, and I) perovskites have attracted great attention, owning to their promising and exciting applications in optoelectronic devices. Herein, we reported the exploration of superior photodetectors (PDs) based on a single CsPbI 3 nanorod. The as-constructed PDs had a totally excellent performance with a responsivity of 2.92 × 10 3 A·W –1 and an ultrafast response time of 0.05 ms, respectively, which were both comparable to the best ones ever reported for all-inorganic perovskite PDs. Furthermore, the detectivity of the PDs approached up to 5.17 × 10 13 Jones, which was more than 5 times the best one ever reported. More importantly, the as-constructed PDs showed a high stability when maintained under ambient conditions.