Fig. 1: Light and voltage co-stimulated synapse based on MoS2/h-BN heterostructure.
From: Photoelectroactive artificial synapse and its application to biosignal pattern recognition

a Schematic illustration of device structure and bidirectional weight operation process. b Postsynaptic current (Ipost) responses to the co-stimuli consisting of optical and electrical spikes. c Energy band diagrams indicating weight-updating principles of long-term potentiation and depression (LTP/D). d Photoluminescence (PL) spectra of h-BN. e Kelvin probe force microscope (KPFM) work function mapping image of h-BN and MoS2 before and after ionization of h-BN defects.