Stretchable and Stable Electrolyte-Gated Organic Electrochemical Transistor Synapse with a Nafion Membrane for Enhanced Synaptic Properties,Advanced Engineering Materials

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Stretchable and Stable Electrolyte-Gated Organic Electrochemical Transistor Synapse with a Nafion Membrane for Enhanced Synaptic Properties
Advanced Engineering Materials ( IF 3.4 ) Pub Date : 2021-09-08 , DOI: 10.1002/adem.202100918
Trong Danh Nguyen ₁ , Tran Quang Trung ₁ , Yurim Lee ₁ , Nae-Eung Lee ₂

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Stretchable artificial synaptic devices are promising for integration into soft neuromorphic systems. However, the organic electrochemical transistor (OECT)-based synaptic device is challenging due to the difficulty of obtaining high mechanical deformability and durability as well as high long-term plasticity (LTP) and retention time. Herein, a highly stable and stretchable synaptic OECT fabricated on a 3D mogul-patterned substrate with stress absorption capability with improved synaptic properties is reported. The mechanical stability of a poly(3,4-ethylenedioxythiophene)polystyrene sulfonate (PEDOT:PSS) channel and, in turn, the OECT is improved by adding additives in the channel. Synaptic properties including synaptic weight (SW), LTP, and retention time could be tuned and improved by adopting a Nafion membrane between the channel and the gate electrode, which modifies the transport dynamics of ions in the electrolyte across the membrane. This approach paves a way for improving and tuning the synaptic properties of stretchable biomimetic OECT synapses.

中文翻译：

具有 Nafion 膜的可拉伸且稳定的电解质门控有机电化学晶体管突触以增强突触特性

可拉伸的人工突触装置有望集成到软神经形态系统中。然而，基于有机电化学晶体管 (OECT) 的突触装置由于难以获得高机械变形性和耐久性以及高长期可塑性 (LTP) 和保留时间而具有挑战性。本文报道了一种高度稳定和可拉伸的突触 OECT，该 OECT 在具有应力吸收能力和改进的突触特性的 3D mogul 图案基板上制造。聚 (3,4-乙烯二氧噻吩) 聚苯乙烯磺酸盐 (PEDOT:PSS) 通道的机械稳定性，进而通过在通道中添加添加剂来改善 OECT。突触属性包括突触权重 (SW)、LTP、通过在通道和栅电极之间采用 Nafion 膜，可以调整和改善保留时间，这可以改变电解质中离子在膜上的传输动力学。这种方法为改进和调整可拉伸仿生 OECT 突触的突触特性铺平了道路。

更新日期：2021-09-08

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