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Photoelectric synapse device based on organic-inorganic heterojunction, and preparation method and application thereof

A technology of synapse device and heterojunction, applied in the field of photoelectric synapse device and its preparation, can solve the problems of poor reliability, limited photoelectric synapse function, small wavelength response range, etc., achieve low power consumption, simple and economical preparation method , the effect of high sensitivity

Pending Publication Date: 2022-01-11
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the practical application of these optoelectronic synapses is still a daunting task due to their limited functions, small wavelength response range, and poor reliability.

Method used

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  • Photoelectric synapse device based on organic-inorganic heterojunction, and preparation method and application thereof
  • Photoelectric synapse device based on organic-inorganic heterojunction, and preparation method and application thereof
  • Photoelectric synapse device based on organic-inorganic heterojunction, and preparation method and application thereof

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Embodiment 1

[0037] A preparation method based on an organic-inorganic heterojunction photoelectric synapse device, comprising the following steps:

[0038] (1) Conductive substrate treatment: The ITO bottom electrode was ultrasonically treated with deionized water, ethanol, and isopropanol for 15 minutes, and dried with nitrogen; then oxygen plasma treatment was performed.

[0039] (2) Preparation of oxide layer: Spin-coat zinc acetate dihydrate solution with a concentration of 20mg / mL on the bottom electrode at a speed of 3000r / min as a seed crystal, and treat it in an oven at 180°C for 30min. The above substrate was placed in a solution with deionized water, hexamethylenetetramine and zinc nitrate hexahydrate at a ratio of 25mL: 25mg: 50mg, reacted at 95°C for 3h, and finally washed with deionized water to prepare ZnO nanoarrays.

[0040] (3) Polymer layer preparation: The monomer 5,10,15,20-tetrakis(4-aminophenyl)porphyrin with a concentration of 0.05mol / mL and the monomer 2,5- Mix t...

Embodiment 2

[0043] A preparation method based on an organic-inorganic heterojunction photoelectric synapse device, comprising the following steps

[0044](1) Conductive substrate treatment: The ITO bottom electrode was ultrasonically treated with deionized water, ethanol, and isopropanol for 15 minutes, and dried with nitrogen; then oxygen plasma treatment was performed.

[0045] (2) Oxide layer preparation: Spin-coat zinc acetate dihydrate solution with a concentration of 10 mg / mL on the bottom electrode as a seed crystal at a speed of 3000 r / min, and treat it in an oven at 180 °C for 30 min. The above substrate was placed in a solution with deionized water, hexamethylenetetramine and zinc nitrate hexahydrate at a ratio of 25mL: 25mg: 50mg, reacted at 95°C for 3h, and finally washed with deionized water to prepare ZnO nanoarrays.

[0046] (3) Polymer layer preparation: The monomer 5,10,15,20-tetrakis(4-aminophenyl)porphyrin with a concentration of 0.05mol / mL and the monomer 2,5- Mix th...

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Abstract

The invention discloses a photoelectric synapse device based on an organic-inorganic heterojunction, and a preparation method and application thereof. The device sequentially comprises a bottom electrode, an oxide layer, a polymer layer and a top electrode from bottom to top, the oxide layer is a zinc oxide nano array prepared by a hydrothermal method, and the polymer layer is a two-dimensional conjugated microporous polymer prepared by a solution method. Due to the fact that the zinc oxide nano array and the polymer have strong light absorption performance in ultraviolet and visible light wave bands respectively, the zinc oxide nano array and the two-dimensional polymer are assembled layer by layer, and the constructed organic-inorganic two-dimensional heterojunction can achieve light absorption in the range from ultraviolet to visible light. The device can change the carrier concentration and the current intensity by adjusting the illumination time / intensity, and further can simulate the current enhancement effect and the empirical learning behavior after excitatory synapse in the human brain. The photoelectric synapse device based on the organic-inorganic heterojunction prepared by the invention has the performance advantages of broadband response, easiness in preparation, low cost, low power consumption, high stability and the like.

Description

technical field [0001] The invention relates to the field of optoelectronic information materials and storage, in particular to a photoelectric synapse device based on an organic-inorganic heterojunction material and its preparation method and application. Background technique [0002] The neural information activities of the human brain have the advantages of efficient energy utilization, large-scale parallelism, distributed storage and processing, autonomous learning, and low power consumption. Studies have shown that these excellent properties of the human brain are mainly due to the biological synapses in the nervous system, which have computing and storage capabilities. It is highly desirable to simulate synaptic function and execute low-energy and densely interconnected neural network algorithms similar to those of the human brain. [0003] At present, artificial synapses have been successfully realized by using different types of materials, and the excellent applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/15H10K71/12H10K30/152Y02E10/549
Inventor 刘正东宋诚王晓靖班超逸刘举庆
Owner NANJING UNIV OF TECH
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