Combination of solution-phase process and halide exchange for all-inorganic, highly stable CsPbBr3 perovskite nanowire photodetector

The synthesis of high quality all-inorganic perovskite nanowires needs the harsh conditions, complex process and precision instruments, which are not beneficial to their extensive application. Here, all-inorganic perovskite cesium lead bromine (CsPbBr3) nanowires (NWs) are demonstrated with the combination of solution-phase process and halide exchange technology. A metal-semiconductor-metal structure CsPbBr3 nanowire photodetector was prepared, which showed a detectivity as high as 1.7×1011 cm Hz1/2 W−1 (Jones) with rapid response time (The rise and decay time are 10 ms and 22 ms, respectively). Moreover, our photodetectors have high stability under ultraviolet (UV) light, high temperature and humidity.