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Ferroelectric-controlled two-end lead-free perovskite artificial photosynaptic device and preparation method thereof

A technology of lead-free perovskite and synaptic devices, which can be applied in the fields of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc. It can solve the problems of complex manufacturing process and the introduction of gates, and achieve easy implementation and low cost , the effect of simple operation steps

Pending Publication Date: 2022-03-11
EAST CHINA NORMAL UNIV
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Problems solved by technology

[0004] However, the complex manufacturing process and the introduction of the gate pose challenges to the device's manufacturing process and power consumption.

Method used

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  • Ferroelectric-controlled two-end lead-free perovskite artificial photosynaptic device and preparation method thereof
  • Ferroelectric-controlled two-end lead-free perovskite artificial photosynaptic device and preparation method thereof
  • Ferroelectric-controlled two-end lead-free perovskite artificial photosynaptic device and preparation method thereof

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Embodiment 1

[0028] In this example, polyvinylidene fluoride-trifluoroethylene copolymer (P(VDF-TrFE)) is used as an organic ferroelectric polymer, and cesium silver bismuth bromide (Cs 2 AgBr 6 ) is a lead-free perovskite, and an artificial synaptic device based on a lead-free perovskite and an organic ferroelectric polymer is prepared, and the specific steps are as follows:

[0029] 1) The ITO substrate was ultrasonically cleaned in deionized water, propanol, ethanol and isopropanol in sequence for 20 minutes, and the surface of the substrate was blown dry with nitrogen and placed in a dry box for use.

[0030] 2) Cesium bromide (CsBr), silver bromide (AgBr) and bismuth bromide (BiBr 3 ) was weighed at a molar ratio of 2:1:1 and dissolved in 1 ml of dimethyl sulfoxide (DMSO). The solution was heated to 75°C and stirred for 2 hours in the atmosphere to obtain a concentration of 0.5 moles per liter The clear and transparent yellow Cs 2 AgBr 6 solution.

[0031] 3) The polyvinylidene f...

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Abstract

The ferroelectric-controlled perovskite artificial photosynapse device is characterized in that a lower electrode is sequentially spin-coated with a lead-free perovskite thin film and an organic ferroelectric polymer thin film to form a semiconductor active functional layer, and then an upper electrode is thermally evaporated on the functional layer; the preparation method of the ferroelectric controlled two-end artificial synapse device specifically comprises the following steps: preparing a spin-coating liquid, spin-coating the lead-free perovskite thin film and the organic ferroelectric polymer thin film, and evaporating the upper electrode. Compared with the prior art, the method has the advantages of picoampere-level operation current, zero power consumption, long memory time and the like, can simulate a typical biological synaptic function under the stimulation action of light with a specific wavelength, can be applied to construction of an artificial neural network system, and is simple and feasible in preparation method, low in cost, safe and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of artificial synapse optoelectronic devices, in particular to a method for preparing a ferroelectrically regulated two-terminal lead-free perovskite artificial optical synapse device. Background technique [0002] The rise of the Internet of Things (IoT) poses serious challenges to traditional von Neumann-based computers. Therefore, simulating the structure and working principle of the human brain to realize brain-like parallelism, high efficiency and low power consumption is one of the effective ways to solve this problem. The human brain consists of about 10 11 composed of neurons with about 10 inter-neurons 15 Synaptic plasticity is thought to be the biological basis of learning and memory. Significant progress has been made in the research of electrically stimulating artificial synapse devices and arrays. Compared with electrically stimulating artificial synapses, optical signal stimulation has the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48G06N3/063G06N3/04
CPCG06N3/049G06N3/063H10K85/141H10K30/10H10K2102/00Y02E10/549
Inventor 彭晖劳婕蒋纯莉罗春花
Owner EAST CHINA NORMAL UNIV
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