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Battery type electrochemical synaptic transistor based on polythiophene and preparation method thereof

An electrochemical and polythiophene technology, applied in the fields of electrical solid device, semiconductor/solid state device manufacturing, circuit, etc., can solve the problems of carrier recombination and difficult charge storage, and achieve excellent synaptic plasticity and excellent ion response behavior. Effect

Active Publication Date: 2021-09-17
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a battery-type electrochemical synapse transistor based on polythiophene, by introducing an N-type organic semiconductor capable of cation storage into the gate to build a battery-type electrochemical synapse transistor, Using the cation storage at the electrolyte / gate presynaptic interface to couple the anion storage in the P-type semiconductor to construct a dual-ion battery, thereby stabilizing the hole carrier concentration in the channel, and solving the problem of difficult charge storage and gate / electrolyte interface. Carrier recombination and other issues

Method used

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  • Battery type electrochemical synaptic transistor based on polythiophene and preparation method thereof
  • Battery type electrochemical synaptic transistor based on polythiophene and preparation method thereof
  • Battery type electrochemical synaptic transistor based on polythiophene and preparation method thereof

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Embodiment 1

[0039] 1) Cleaning of the substrate: remove the dust-proof film on the surface of the substrate, use acetone, isopropanol, and deionized water to perform ultrasonic treatment for 10 minutes respectively, and dry the substrate with nitrogen, then transfer it to an oven for drying, In order to obtain a clean silicon oxide wafer as the substrate;

[0040] 2) Preparation of source and drain electrodes: Put a custom-made electrochemical transistor source and drain electrode mask (channel width W=30 μm, channel length L=2000 μm) on the sample holder of the evaporation system, and place the substrate on the mask Put the sample rack into the evaporation chamber, place 3-5cm of gold on the evaporation tungsten boat and close the chamber; at this time, start the cooling system and the compression pump, turn on the power supply of the evaporation system and the vacuum gauge After the switch, turn on the mechanical pump and solenoid valve in turn, and turn on the molecular pump after the ...

Embodiment 2

[0048] The difference between Example 2 and Example 1 is that the ionic liquid used in step (4) is 1-ethyl-3-methylimidazolium trifluoromethanesulfonate ([EMIM][OTF]).

[0049] When the basic electrical properties of the device are tested, the device exhibits excellent electrochemical properties, including but not limited to the device gate voltage-current has typical oxidation / reduction characteristics, and the output and transfer characteristic curves of the device have those of memristors. Typical hysteresis characteristics, memristive characteristics with continuously adjustable conductivity.

[0050] When the device was tested for synaptic function, the device showed good synaptic plasticity, including but not limited to excitatory postsynaptic current (EPSC), double-pulse facilitation (PPF), enhancement / inhibition of synaptic weights (Potentiation / Depression), pulse rate-dependent plasticity (SRDP).

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Abstract

The invention relates to a battery type electrochemical synaptic transistor based on polythiophene and a preparation method thereof, and belongs to the technical field of organic semiconductor materials and devices. The battery type electrochemical transistor is based on an electrochemical transistor and an electric double layer effect thereof, is combined with a reversible oxidation reduction mechanism of a double-ion battery, is guided by a classical Hodgkin-Huxley model in neurobiology, and introduces an N-type polymer semiconductor layer on the basis of a traditional P-type electrochemical transistor, so that the doping concentration of anions in the P-type polymer is greatly stabilized, and meanwhile, the problems of unstable conductive state and the like caused by carrier recombination are successfully solved. According to the battery type device, the construction of a stable anion / cation storage interface is realized, and meanwhile, the cation storage layer, the electrolyte layer and the anion storage layer respectively realize deep simulation on three parts of biological synapses, namely pre-synaptic neurons, synaptic gaps and post-synaptic neurons.

Description

technical field [0001] The invention belongs to the technical field of organic semiconductor materials and devices, and in particular relates to a battery-type electrochemical synapse transistor based on polythiophene and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of information technology, computer networks based on the traditional von Neumann architecture have been difficult to meet the needs of information processing. Brain-like computing, as a new type of computing architecture, is expected to realize the simulation of biological neural networks from the hardware through the simulation of biological neural networks with the help of neuromorphic devices that can integrate storage and calculation, and then it is expected to fundamentally subvert the classic The computing strategy realizes a highly parallel, low power consumption, highly integrated and high-throughput information processing platform, which further...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/05H01L51/30H01L51/40G06N3/06
CPCG06N3/061H10K71/12H10K85/113H10K10/46
Inventor 林宗琼张晓翁洁娜郑昊杨波傅莉黄维
Owner NORTHWESTERN POLYTECHNICAL UNIV
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