Dynamically Reconfigurable Short-Term Synapse with Millivolt Stimulus Resolution Based on Organic Electrochemical Transistors

Haifeng Ling, Naixiang Wang, Anneng Yang, Yanghui Liu, Jiajun Song, Feng Yan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)

Abstract

Electrolyte-gated organic electrochemical transistors (OECTs) are attractive for synaptic electronics owing to the ionic–electronic coupling, huge specific capacitance, physiological environmental compatibility, and architectural flexibility. Here, an identical spike-polarity method is reported to realize the concomitance of excitatory and inhibitory short-term plasticities in unipolar poly(3,4-ethylenedioxythiophene)–poly(styrenesulphonate) (PEDOT:PSS) OECTs. Dynamical reconfiguration between the excitatory and inhibitory responses with multilevel and well-balanced synaptic strength is realized, without performing operations or introducing additional modulation terminals. Owing to the distinctive volumetric capacitance of OECTs, the PEDOT:PSS synapse affords remarkable characteristics such as an ultrahigh stimulus-resolution capability of 10 mV and an ultralow power consumption of ≈2 pJ per spike. Moreover, spatiotemporal-correlated logics is realized. This work demonstrates on-demand manipulation of ionic dynamics for building synaptic elements with sophisticated functionalities at a single-device level.

Original languageEnglish
Article number1900471
JournalAdvanced Materials Technologies
Volume4
Issue number9
DOIs
Publication statusPublished - 1 Sep 2019

Keywords

  • artificial synapse
  • conducting polymer
  • electrochemical doping
  • OECT
  • short-term plasticity

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering

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