Correlation between Transient Response and Neuromorphic Behavior in Organic Electrochemical Transistors

Correlation between Transient Response and Neuromorphic Behavior in Organic Electrochemical Transistors
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有机电化学晶体管瞬态响应与神经形态行为的相关性

DOI:
10.1002/aelm.202101186
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发表时间:
2022
影响因子:
6.2
通讯作者:
Malliaras George G.
Malliaras George G.
中科院分区:
材料科学2区
文献类型:
--
作者:
Yamamoto Shunsuke;Polyravas Anastasios G.;Han Sanggil;Malliaras George G.

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研究了控制有机电化学晶体管(OECTS)神经形态响应的因素。在这些装置中,栅极电压被用来提供突触前输入,而漏电流被用作突触后输出。分析了由混合导体(PEDOT:PSS)和离子导体(PSSNa)组成的聚合物共混物制成的器件的行为。实验结果表明,突触后反应的时间尺度取决于电解液中离子的大小。建模表明,神经形态响应由光电电流互感器离子回路的暂态响应控制。这些关于设备响应时间的见解为基于OECT的神经形态设备的更合理设计铺平了道路。
The factors controlling the neuromorphic response of organic electrochemical transistors (OECTs) are examined. In these devices, the gate voltage is used to supply the pre‐synaptic input, while the drain current is taken as the post‐synaptic output. The behavior of devices made from polymer blends of a mixed conductor (PEDOT:PSS) and an ion conductor (PSSNa) is analyzed. The experimental results highlight that the post‐synaptic response timescale depends on the size of ion in the electrolyte. Modeling shows that the neuromorphic response is controlled by the transient response of the ionic circuit of the OECT. These insights on device response time pave the way for a more rational design of OECT‐based neuromorphic devices.
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