Self-Powered Photodetectors on the Lateral CsPbBr3/CsPbI3 Perovskite Heterostructure Nanoplates

Self-powered photodetectors have attracted the extensive attention in the past years. Herein, we synthesized the lateral CsPbBr 3 /CsPbI 3 perovskite heterosrtucture nanoplates using anti-solvent solution method and fabricated the self-powered photodetectors by transfer the Au-Au electrodes onto the surface of single CsPbBr 3 /CsPbI 3 nanoplate. Under zero bias, this photodetector showed a reversible switching behavior under turn on/off illumination light with responsivity up to 0.887 mA W −1 and external quantum efficiency of 0.247%, benefiting from the intrinsic built-in electrical potential in the heterosrtuctures. These results enable a significant progress of all-inorganic halide perovskites toward the low-power consumption optoelectronics nanodevices.