Excellent synaptic behavior of lithium-based nano-ionic transistor based on optimal WO2.7 stoichiometry with high ion diffusivity
SCIE
SCOPUS
- Title
- Excellent synaptic behavior of lithium-based nano-ionic transistor based on optimal WO2.7 stoichiometry with high ion diffusivity
- Authors
- LEE, LEEJONGWON; NIKAM REVANNATH; SEOKJAE, LIM; KWAK, MYOUNG HOON; Hwang, Hyunsang
- Date Issued
- 2020-03
- Publisher
- IOP PUBLISHING LTD
- Abstract
- In this study, we introduce a lithium (Li) ion-based three-terminal (3-T) synapse device using WOx as a channel. Our study reveals a key stoichiometry of WO2.7 for excellent synaptic characteristics that is related to Li-ion diffusivity. The open-lattice structure formed by oxygen deficiency promoted Li-ion injection and diffusion. The optimized stoichiometry and improved Li-ion diffusivity were confirmed by x-ray photoelectron spectroscopy analysis and cyclic voltammetry, respectively. Furthermore, the transient conductance change that inevitably occurs in ion-based synaptic transistors was resolved by applying a two-step voltage pulse scheme. As a result, we achieved a symmetric and linear weight-update characteristic with reduced program/erase operation time.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/105620
- DOI
- 10.1088/1361-6528/ab793d
- ISSN
- 0957-4484
- Article Type
- Article
- Citation
- NANOTECHNOLOGY, vol. 31, no. 23, 2020-03
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- There are no files associated with this item.
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