Co-assembled perylene/graphene oxide photosensitive heterobilayer for efficient neuromorphics

Abstract

Neuromorphic electronics, which use artificial photosensitive synapses, can emulate biological nervous systems with in-memory sensing and computing abilities. Benefiting from multiple intra/interactions and strong light-matter coupling, two-dimensional heterostructures are promising synaptic materials for photonic synapses. Two primary strategies, including chemical vapor deposition and physical stacking, have been developed for layered heterostructures, but large-scale growth control over wet-chemical synthesis with comprehensive efficiency remains elusive. Here we demonstrate an interfacial coassembly heterobilayer films from perylene and graphene oxide (GO) precursors, which are spontaneously formed at the interface, with uniform bilayer structure of single-crystal perylene and well-stacked GO over centimeters in size. The planar heterostructure device exhibits an ultrahigh specific detectivity of 3.1 × 1013 Jones and ultralow energy consumption of 10−9 W as well as broadband photoperception from 365 to 1550 nm. Moreover, the device shows outstanding photonic synaptic behaviors with a paired-pulse facilitation (PPF) index of 214% in neuroplasticity, the heterosynapse array has the capability of information reinforcement learning and recognition.

Applications of Graphene in Five Senses, Nervous System, and Artificial Muscles

“…Besides, the synapse achieved a 92% recognition accuracy for the shape of the number 7. Liu, Li, and Huang et al 197 prepared a perylene/ graphene based photodetector for synaptic devices, which showed high plasticity of the paired-pulsed facilitation index (214%). The pattern image of "CEO" can be recognized with accuracy (85%) by the artificial neural network structure.…”

Light-/steam-driven polymeric crosslinking with porous multistructure pattern for ultrastable and fast-speed memory

“…S16), resulting in resistive switching of the memory from HRS to LRS, demonstrating the capability of dynamic temperature sensing and recording. Thus, the integration of functional sensors with the polymer memory to construct the artificial sensory memory system could mimic the human sensory memory [55][56][57], and will promoting the application of artificial intelligence in future bionic devices and multifunctional robotics.…”

An Organic Optoelectronic Synapse with Multilevel Memory Enabled by Gate Modulation

“…This demonstrates a PPF characteristic, where subsequent presynaptic inputs yield an elevated postsynaptic response relative to a single input. We anticipate that the photon-generated charge carriers hardly decay to the initial state before the arrival of the next pulse, resulting in the accumulation of additional photogenerated charge carriers, 52 a phenomenon that is reminiscent of the biological synaptic behavior. 53 The PPF and PTP (post-tetanic potentiation), two indicators of presynaptic plasticity, which evaluate the variations in synaptic response strength depending on the timing and pattern of synaptic inputs, are defined as follows…”