材料科学
电解质
晶体管
紫外线
光电子学
活动层
神经形态工程学
聚合物
紫外线
图层(电子)
纳米技术
化学工程
电极
复合材料
薄膜晶体管
电压
计算机科学
电气工程
化学
工程类
物理化学
机器学习
人工神经网络
作者
Haeyeon Lee,Minho Jin,Hyun‐Jae Na,Churl Hyun Im,Jae Hak Lee,Jiyeon Kim,Yong Gong,Chan Lee,Eungkyu Lee,Youn Sang Kim
标识
DOI:10.1002/adfm.202110591
摘要
Abstract Electrolyte‐gated transistors (EGTs) have been extensively studied as a next‐generation neuromorphic device mimicking the biological ionic flux in synapses. However, its long‐term plasticity characteristic lasts only for few seconds because of the rapid self‐discharge of electrical double layer. Here, ultraviolet ozone (UVO) treated water‐in‐bisalt (WiBS)/polymer electrolyte‐gated synaptic transistor (WEST) which excellently implements multiple synaptic functions is proposed. Ultraviolet (UV) light and reactive oxygen radicals generated during UVO treatment form trap sites on the surface of active layer, causing lithium cations in the WiBS/polymer electrolyte to be captured at the electrolyte/active layer interface. The UVO treated WEST shows enhanced nonvolatile memory performance for 10 000 s, up to 1186 times longer than that of the untreated WEST. Also, near‐ideal weight update over 10 000 cycle tests with 0.32 and −0.55 nonlinearities of long‐term potentiation and depression is acquired with a ten times improved symmetricity. These results confirm that the surface engineering is a key technique for sophisticated ion transport, and demonstrate various applicability of EGTs as a neuromorphic device.
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