Issue 4, 2023

Evaluating charge-type of polyelectrolyte as dielectric layer in memristor and synapse emulation

Abstract

Based on credible advantages, organic materials have received more and more attention in memristor and synapse emulation. In particular, an implementation of the ionic pathway as a dielectric layer is essential for organic materials used as building blocks of memristor and artificial synaptic devices. Herein, we describe an evaluation of the use of positive and negative polyelectrolytes as dielectric layers for a memristor with calcium ion (Ca2+) doping. The device based on a negative polyelectrolyte shows the potential to obtain an excellent resistive switching performance and synapse functionality, especially in the transformation behaviours from short-term plasticity (STP) to long-term plasticity (LTP) in both the potentiation and depression processes, which were comparable to the perfomrmance obtained with a positive polyelectrolyte. The mechanism of electrical resistance transition and synaptic function can be attributed to the migration of the doped Ca2+ and the ionic functional groups of polyelectrolyte, which result in the formation and vanishing filament-like Ca2+ flux.

Graphical abstract: Evaluating charge-type of polyelectrolyte as dielectric layer in memristor and synapse emulation

Supplementary files

Article information

Article type
Communication
Submitted
07 Nov 2022
Accepted
30 Jan 2023
First published
30 Jan 2023

Nanoscale Horiz., 2023,8, 509-515

Evaluating charge-type of polyelectrolyte as dielectric layer in memristor and synapse emulation

J. Shi, S. Kang, J. Feng, J. Fan, S. Xue, G. Cai and J. S. Zhao, Nanoscale Horiz., 2023, 8, 509 DOI: 10.1039/D2NH00524G

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