Silicon-Nanomembrane-Based\nBroadband Synaptic Phototransistors\nfor Neuromorphic Vision

Abstract

Neuromorphic vision has been attracting much attention\ndue to its\nadvantages over conventional machine vision (e.g., lower data redundancy\nand lower power consumption). Here we develop synaptic phototransistors\nbased on the silicon nanomembrane (Si NM), which are coupled with\nlead sulfide quantum dots (PbS QDs) and poly(3-hexyl­thiophene)\n(P3HT) to form a heterostructure with distinct photogating. Synaptic\nphototransistors with optical stimulation have outstanding synaptic\nfunctionalities ranging from ultraviolet (UV) to near-infrared (NIR).\nThe broadband synaptic functionalities enable an array of synaptic\nphototransistors to achieve the perception of brightness and color.\nIn addition, an array of synaptic phototransistors is capable of\nsimultaneous sensing, processing, and memory, which well mimics human\nvision.