Flexible Memristor Constructed by 2D Cadmium Phosphorus Trichalcogenide for Artificial Synapse and Logic Operation

Abstract

The development of advanced microelectronics requires new device architecture and multi‐functionality. Low‐dimensional material is considered as a powerful candidate to construct new devices. In this work, a flexible memristor is fabricated utilizing 2D cadmium phosphorus trichalcogenide nanosheets as the functional layer. The memristor exhibits excellent resistive switching performance under different radius and over 103 bending times. The device mechanism is systematically investigated, and the synaptic plasticity including paired‐pulse facilitation and spiking timing‐dependent plasticity are further observed. Furthermore, based on the linearly conductance modulation capacity of the flexible memristor, the applications on decimal operation are explored, that the addition, subtraction, multiplication, and division of decimal calculation are successfully achieved. These results demonstrate the potential of metal phosphorus trichalcogenide in novel flexible neuromorphic devices, which accelerate the application process of neuromorphic computing.

Squeeze-Printing Ultrathin 2D Gallium Oxide out of Liquid Metal for Forming-Free Neuromorphic Memristors

“…This characteristic was simulated by applying two successive pre-pulses with Δ t from 2 to 22 ms in the Pt/Ga 2 O 3 /n + Si memristor. The PPF index ([( A 2 – A 1 )/ A 1 ] × 100% = C 1 .25em exp ( − t τ 1 ) + C 2 .25em exp ( − t τ 2 ) , where A 1 and A 2 were the conductance readouts after the first and second pulses and C 1 and C 2 were the initial facilitation magnitudes) , as the function of Δ t is fitted in Figure d. The two fitting time constants, τ 1 (5.029 ms) and τ 2 (17.211 ms), corresponded to the fast and slow decaying terms, respectively.…”

“…, where A 1 and A 2 were the conductance readouts after the first and second pulses and C 1 and C 2 were the initial facilitation magnitudes) 45,46 as the function of Δt is fitted in Figure 4d. The two fitting time constants, τ 1 (5.029 ms) and τ 2 (17.211 ms), corresponded to the fast and slow decaying terms, respectively.…”

Artificial Neuron Devices

“…In addition to substrates, 2D materials (e.g., graphene, 2D transition metal dichalcogenides, h-BN, 2D cadmium phosphorus trichalcogenide) with atomic layer thickness and ultrathin organic films with molecular-scale thickness has gradually become popular choices for flexible synaptic devices due to their intrinsic bendability. The 1D nanowire or network structure also are competitive candidates for strain-resistant synaptic devices, such as carbon nanotube networks , and conductive polymer nanofibers. , Yang et al showed a 1D organic charge-transfer complex well-aligned array on the polyimide (PI) substrate that could confine the conducting filaments to reliable performance .…”

“…Recently, Chen and coauthors developed a fiber-based memristor network comprising fragile Ag/MoS 2 /HfAlO x /carbon nanotubes (CNTs), providing a novel pathway toward the development of flexible in-memory computing textile systems. 246 In addition to substrates, 2D materials (e.g., graphene, 247 2D transition metal dichalcogenides, 248 h-BN, 249 2D cadmium phosphorus trichalcogenide 250 ) with atomic layer thickness and ultrathin organic films with molecular-scale thickness has gradually become popular choices for flexible synaptic devices due to their intrinsic bendability. The 1D nanowire or network structure also are competitive candidates for strain-resistant synaptic devices, such as carbon nanotube networks 251,252 and conductive polymer nanofibers.…”

Effect of external electric field on the electronic properties of the AlAs/SiC van der Waals heterostructure

“…6 In addition, 2D layered materials are flexible, which offers great possibilities for their applications in flexible electronics. 7,8 Moreover, the stacking order or twist angle between the layers provides a new degree of freedom, which may induce a new quantum effect. 9,10 Currently, 2D vdW heterostructures have become a focus of material science research.…”