▎ 摘　　要

NOVELTY - Device (100) comprises a perovskite nanocrystal (NC) layer, a charge separating layer (120), an insulating layer (110), a gate electrode (180), a cathode (140), and an anode (150), where the charge separating layer is positioned between the perovskite NC layer and the insulating layer, the insulating layer is positioned between the charge separating layer and the gate electrode, and the cathode and the anode both electrically contact the charge separating layer and the insulating layer. USE - Device ADVANTAGE - The device is configured to operate as at least one of a photodetector, an optical switching device, and/or a neuromorphic switching device. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method, which involves applying at least one of a source drain voltage, a gate voltage, or a light pulse to a device, and measuring a photocurrent generated by the device as a result of the applying, where the device comprises a perovskite nanocrystal (NC) layer, a charge separating layer, an insulating layer, a gate electrode, a cathode, and an anode. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a device. Device (100) Insulating layer (110) Charge separating layer (120) Cathode (140) Anode (150) Gate electrode (180)