▎ 摘　　要

NOVELTY - The detector has a metal electrode layer provided with a source electrode and a drain electrode. A channel is formed between the source and drain electrodes. A photosensitive layer is provided with graphene on the channel and above the drain electrode, where the graphene comprises a layer of a drape structure. The graphene and a perovskite are connected in a heterojunction. The source and the drain electrodes are configured to make current pass through the photosensitive layers to make the source pass the current through the photosensitive layer. An electron-hole pair is generated when exposed to incident electromagnetic radiation to generate a detectable change current. USE - Photoelectric detector based on perovskite and graphene composite used in photoelectric field such as solar cell, transistor and photoelectric detector direction due to the protruding photoelectric characteristics. ADVANTAGE - The wrinkle structure of the graphene will reduce deformation, increase the stability of the device and repeatability of device manufacturing performance. The superlattice structure is more stable, convenient for further processing the configuration of the surface. The deformation of graphene is reduced, and stability of device is increased. The performance index, linear dynamic range and response time of the photoelectric detector are improved. The dark noise is reduced and the amount of light that can be absorbed in the films is increased, and the performance of the photovoltaic device is improved. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a photoelectric detector based on perovskite and graphene composite. 101High doped silicon substrate 102Ti/au source electrode 103Providing ultra-thin graphene 104Electromagnetic radiation excitation perovskite 105Drain electrode