Light-Intensity Switching of Graphene/WSe₂ Synaptic Devices.

ABSTRACT: 2D van der Waals heterojunctions (vdWH) have emerged as an attractive platform for the realization of optoelectronic synaptic devices, which are critical for energy-efficient computing systems. Photogating induced by charge traps at the interfaces indeed results in ultrahigh responsivity and tunable photoconductance. Yet, optical potentiation and depression remain mostly modulated by gate bias, requiring relatively high energy inputs. Thus, advanced all-optical synapse switching strategies are still needed. In this work, a reversible switching between positive photoconductivity (PPC) and negative photoconductivity (NPC) is achieved in graphene/WSe₂ vdWH solely through light-intensity modulation. Consequently, the graphene/WSe₂ synaptic device shows tunable optical pot

SUBMITTER: Tang H 

PROVIDER: S-EPMC11199970 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature