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Near ideal synaptic functionalities in Li ion synaptic transistor using Li(3)PO(x)Se(x) electrolyte with high ionic conductivity

All solid-state lithium-ion transistors are considered as promising synaptic devices for building artificial neural networks for neuromorphic computing. However, the slow ionic conduction in existing electrolytes hinders the performance of lithium-ion-based synaptic transistors. In this study, we sy...

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Autores principales: Nikam, Revannath Dnyandeo, Kwak, Myonghoon, Lee, Jongwon, Rajput, Krishn Gopal, Banerjee, Writam, Hwang, Hyunsang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6906484/
https://www.ncbi.nlm.nih.gov/pubmed/31827190
http://dx.doi.org/10.1038/s41598-019-55310-8
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author Nikam, Revannath Dnyandeo
Kwak, Myonghoon
Lee, Jongwon
Rajput, Krishn Gopal
Banerjee, Writam
Hwang, Hyunsang
author_facet Nikam, Revannath Dnyandeo
Kwak, Myonghoon
Lee, Jongwon
Rajput, Krishn Gopal
Banerjee, Writam
Hwang, Hyunsang
author_sort Nikam, Revannath Dnyandeo
collection PubMed
description All solid-state lithium-ion transistors are considered as promising synaptic devices for building artificial neural networks for neuromorphic computing. However, the slow ionic conduction in existing electrolytes hinders the performance of lithium-ion-based synaptic transistors. In this study, we systematically explore the influence of ionic conductivity of electrolytes on the synaptic performance of ionic transistors. Isovalent chalcogenide substitution such as Se in Li(3)PO(4) significantly reduces the activation energy for Li ion migration from 0.35 to 0.253 eV, leading to a fast ionic conduction. This high ionic conductivity allows linear conductance switching in the LiCoO(2) channel with several discrete nonvolatile states and good retention for both potentiation and depression steps. Consequently, optimized devices demonstrate the smallest nonlinearity ratio of 0.12 and high on/off ratio of 19. However, Li(3)PO(4) electrolyte (with lower ionic conductivity) shows asymmetric and nonlinear weight-update characteristics. Our findings show that the facilitation of Li ionic conduction in solid-state electrolyte suggests potential application in artificial synapse device development.
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spelling pubmed-69064842019-12-13 Near ideal synaptic functionalities in Li ion synaptic transistor using Li(3)PO(x)Se(x) electrolyte with high ionic conductivity Nikam, Revannath Dnyandeo Kwak, Myonghoon Lee, Jongwon Rajput, Krishn Gopal Banerjee, Writam Hwang, Hyunsang Sci Rep Article All solid-state lithium-ion transistors are considered as promising synaptic devices for building artificial neural networks for neuromorphic computing. However, the slow ionic conduction in existing electrolytes hinders the performance of lithium-ion-based synaptic transistors. In this study, we systematically explore the influence of ionic conductivity of electrolytes on the synaptic performance of ionic transistors. Isovalent chalcogenide substitution such as Se in Li(3)PO(4) significantly reduces the activation energy for Li ion migration from 0.35 to 0.253 eV, leading to a fast ionic conduction. This high ionic conductivity allows linear conductance switching in the LiCoO(2) channel with several discrete nonvolatile states and good retention for both potentiation and depression steps. Consequently, optimized devices demonstrate the smallest nonlinearity ratio of 0.12 and high on/off ratio of 19. However, Li(3)PO(4) electrolyte (with lower ionic conductivity) shows asymmetric and nonlinear weight-update characteristics. Our findings show that the facilitation of Li ionic conduction in solid-state electrolyte suggests potential application in artificial synapse device development. Nature Publishing Group UK 2019-12-11 /pmc/articles/PMC6906484/ /pubmed/31827190 http://dx.doi.org/10.1038/s41598-019-55310-8 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Nikam, Revannath Dnyandeo
Kwak, Myonghoon
Lee, Jongwon
Rajput, Krishn Gopal
Banerjee, Writam
Hwang, Hyunsang
Near ideal synaptic functionalities in Li ion synaptic transistor using Li(3)PO(x)Se(x) electrolyte with high ionic conductivity
title Near ideal synaptic functionalities in Li ion synaptic transistor using Li(3)PO(x)Se(x) electrolyte with high ionic conductivity
title_full Near ideal synaptic functionalities in Li ion synaptic transistor using Li(3)PO(x)Se(x) electrolyte with high ionic conductivity
title_fullStr Near ideal synaptic functionalities in Li ion synaptic transistor using Li(3)PO(x)Se(x) electrolyte with high ionic conductivity
title_full_unstemmed Near ideal synaptic functionalities in Li ion synaptic transistor using Li(3)PO(x)Se(x) electrolyte with high ionic conductivity
title_short Near ideal synaptic functionalities in Li ion synaptic transistor using Li(3)PO(x)Se(x) electrolyte with high ionic conductivity
title_sort near ideal synaptic functionalities in li ion synaptic transistor using li(3)po(x)se(x) electrolyte with high ionic conductivity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6906484/
https://www.ncbi.nlm.nih.gov/pubmed/31827190
http://dx.doi.org/10.1038/s41598-019-55310-8
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