High-performance perovskite photodetectors based on CH 3 NH 3 PbBr 3 quantum dot/TiO 2 heterojunction

, and rise/decay time of 0.09/0.11 s. Furthermore, we demonstrate that interface plays a crucial role in determining the device current and enhance the overall performance of heterostructure photodetector through interface engineering. We believe that this work can provide a strategy to accelerate development of high-performance solution-processed perovskite photodetectors.