TY - JOUR
T1 - Electrochemical Analysis of Ion Effects on Electrolyte-Gated Synaptic Transistor Characteristics
AU - Lee, Haeyeon
AU - Cho, Jinil
AU - Jin, Minho
AU - Lee, Jae Hak
AU - Lee, Chan
AU - Kim, Jiyeon
AU - Lee, Jiho
AU - Shin, Jong Chan
AU - Yoo, Jeeyoung
AU - Lee, Eungkyu
AU - Kim, Youn Sang
N1 - Publisher Copyright:
© 2024 American Chemical Society.
PY - 2023
Y1 - 2023
N2 - Electrolyte-gated transistors (EGTs) are promising candidates as artificial synapses owing to their precise conductance controllability, quick response times, and especially their low operating voltages resulting from ion-assisted signal transmission. However, it is still vague how ion-related physiochemical elements and working mechanisms impact synaptic performance. Here, to address the unclear correlations, we suggest a methodical approach based on electrochemical analysis using poly(ethylene oxide) EGTs with three alkali ions: Li+, Na+, and K+. Cyclic voltammetry is employed to identify the kind of electrochemical reactions taking place at the channel/electrolyte interface, which determines the nonvolatile memory functionality of the EGTs. Additionally, using electrochemical impedance spectroscopy and qualitative analysis of electrolytes, we confirm that the intrinsic properties of electrolytes (such as crystallinity, solubility, and ion conductivity) and ion dynamics ultimately define the linearity/symmetricity of conductance modulation. Through simple but systematic electrochemical analysis, these results offer useful insights for the selection of components for high-performing artificial synapses.
AB - Electrolyte-gated transistors (EGTs) are promising candidates as artificial synapses owing to their precise conductance controllability, quick response times, and especially their low operating voltages resulting from ion-assisted signal transmission. However, it is still vague how ion-related physiochemical elements and working mechanisms impact synaptic performance. Here, to address the unclear correlations, we suggest a methodical approach based on electrochemical analysis using poly(ethylene oxide) EGTs with three alkali ions: Li+, Na+, and K+. Cyclic voltammetry is employed to identify the kind of electrochemical reactions taking place at the channel/electrolyte interface, which determines the nonvolatile memory functionality of the EGTs. Additionally, using electrochemical impedance spectroscopy and qualitative analysis of electrolytes, we confirm that the intrinsic properties of electrolytes (such as crystallinity, solubility, and ion conductivity) and ion dynamics ultimately define the linearity/symmetricity of conductance modulation. Through simple but systematic electrochemical analysis, these results offer useful insights for the selection of components for high-performing artificial synapses.
KW - artificial synapses
KW - electrochemical analysis
KW - electrolyte-gated transistors
KW - ion dynamics
KW - neuromorphic computing
UR - http://www.scopus.com/inward/record.url?scp=85185282022&partnerID=8YFLogxK
U2 - 10.1021/acsnano.3c10082
DO - 10.1021/acsnano.3c10082
M3 - Article
AN - SCOPUS:85185282022
SN - 1936-0851
JO - ACS Nano
JF - ACS Nano
ER -