Self-energized sensory neuromorphic system integrating multiple sensing functions and preparation method of self-energized sensory neuromorphic system

Abstract

The invention provides a self-powered sensory nerve morphology system integrating multiple perception functions and a preparation method thereof, belongs to the technical field of bionic nerve morphology systems, and aims to solve the technical problem that a self-powered bionic nerve component is single in perception function. The self-energized sensory neuromorphic system comprises a lower substrate, a lower electrode layer, a photoelectric sensitive signal processing layer, an upper electrode layer and an upper substrate, and the photoelectric sensitive signal processing layer is prepared by mixing a high-dielectric-property insulating material and a light-absorbing material. The photoelectric sensitive signal processing layer in the self-energized sensory neuromorphic system can sense touch, hearing and the like and can also sense illumination to simulate a biological visual function, so that a single device is promoted to simulate a biological multi-sensory function. The device simultaneously realizes touch, auditory and visual perception calculation functions, and promotes the artificial intelligence technology to realize more efficient multi-application scene and multi-perception interaction, thereby providing a more efficient and rapid development channel for the artificial intelligence technology.

Description

Technical Field

[0001] The present invention belongs to the technical field of bionic neuromorphic systems, and in particular relates to a self-powered sensory neuromorphic system. Background Art

[0002] With the rapid development of the Internet of Things and artificial intelligence (AI), efficient and energy-efficient data storage and computation have become pressing challenges. Traditional von Neumann-based computing often results in extremely high latency and low efficiency due to the separate storage and computation units. The resulting memory wall problem has limited further computer development. The biological brain boasts high efficiency, low power consumption, parallel computing, and autonomous cognition. Brain-inspired, self-powered biomimetic neuromorphic systems, integrating multi-sensory capabilities, are crucial components for breaking through the von Neumann bottleneck in next-generation AI technology.

[0003] Because current multisensory neuromorphic systems based on two-terminal memristors and three-terminal transistors require an additional power supply, achieving efficient, low-energy, and fast computing is difficult. To address this issue, Patent Publication No. CN118310656A discloses a self-powered biomimetic tactile neuron device, its preparation method, and applications. This self-powered biomimetic tactile neuron device comprises a protective layer, a pressure-sensing layer, and a signal-transmitting electrode layer stacked in sequence; the protective layer comprises a polymer film; and the pressure-sensing layer is a composite ion hydrogel film comprising a lithium salt, polyolefinic acid, and polyethylene terephthalate fiber. This self-powered biomimetic tactile neuron device features self-power, high sensitivity, a wide linear sensing range, excellent stability, and biocompatibility. It can also simulate the spatiotemporal signal integration function of neurons, making it suitable for pressure sensing and electrophysiological stimulation-based neural regulation. Furthermore, while self-powered neuromorphic systems can improve energy consumption, they are primarily designed to simulate a single biological sense and cannot meet the demands of the current era of the Internet of Things, which requires the simultaneous interaction of multiple senses. Summary of the Invention

[0004] In response to the technical problem of the single perception function of self-powered bionic neuron devices, the present invention proposes a self-powered sensory neuromorphic system integrating multiple perception functions and a preparation method thereof, which can obtain a device that simultaneously realizes tactile, auditory and visual perception computing functions, enabling artificial intelligence technology to achieve more efficient multi-application scenarios and multi-sensory interactions, thereby providing a more efficient and rapid development channel for artificial intelligence technology.

[0005] In order to achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A self-powered sensory neuromorphic system integrating multiple sensory functions includes a lower substrate, a lower electrode layer, a photoelectric sensitive signal processing layer, an upper electrode layer, and an upper substrate; the upper electrode layer and the lower electrode layer serve as charge transfer electrodes and current and voltage output electrodes of the self-powered sensory neuromorphic system integrating multiple sensory functions; the photoelectric sensitive signal processing layer serves as an important functional layer for the self-powered sensory neuromorphic system integrating multiple sensory functions to perceive tactile, auditory, and visual signals; through the transmission and storage of charges within the photoelectric sensitive signal processing layer, the system ultimately realizes the functions of tactile, auditory, and visual multisensory signal perception, processing, and learning, and outputs a variety of neuromorphic signals between the upper and lower electrodes, such as excitatory / inhibitory postsynaptic currents, double-pulse facilitation, short-term / long-term synaptic plasticity, spike timing-dependent plasticity, etc.

[0007] The lower substrate is a rigid substrate or a flexible substrate, and can be selected from any one of polyethylene terephthalate, glass, silicon dioxide, and polyimide.

[0008] The lower electrode layer is one or more conductive materials, including but not limited to one or two of gold, silver, copper, aluminum, indium tin oxide, and silver nanowires, and a wire is led out as an external electrode.

[0009] The photoelectric sensitive signal processing layer is made of a single material or a mixture of multiple materials that are easy to simulate touch, hearing and vision.

[0010] The photoelectric sensitive signal processing layer that is easy to simulate touch and hearing generally includes a high dielectric performance insulating material with strong electronegativity, including but not limited to conductive ion gel, polyvinyl alcohol, polydimethylsiloxane, polysiloxane, polyvinylidene fluoride, polyethylene glycol dimethacrylate, polyhydroxyethyl methacrylate, or a combination of two or more thereof.

[0011] The photoelectric sensitive signal processing layer that is easy to simulate vision is a light-absorbing material whose energy level is easy to capture electrons, including but not limited to nitrogen carbon compounds, sulfides, borides, cadmium selenide zinc sulfide quantum dots, perovskite quantum dots, metal organic framework materials, and covalent organic framework materials, one or a combination of two or more thereof.

[0012] The upper electrode layer is one or more conductive materials, including but not limited to one or two of gold, silver, copper, aluminum, indium tin oxide, and silver nanowires, and a wire is led out as an external electrode.

[0013] The upper substrate is a rigid substrate or a flexible substrate, and can be selected from any one of polyethylene terephthalate, glass, silicon dioxide, and polyimide.

[0014] The upper electrode is formed on the substrate, the photoelectrically sensitive signal processing layer is formed on the lower electrode, and the upper electrode is formed on the upper substrate.

[0015] The multi-sensory function of the self-powered bionic neuromorphic system integrating multiple sensory functions is to simulate multiple functions of touch, hearing and vision. According to the self-powered bionic neuromorphic system, different sensory input signals are learned and memorized to output different voltage and current signals. The self-powered bionic neuromorphic system integrating multiple sensory functions is realized according to the size of the output voltage and current.

[0016] A method for preparing a self-powered sensory neuromorphic system integrating multiple sensory functions comprises a series of steps:

[0017] (1) depositing the material of the lower electrode layer onto the lower substrate by magnetron sputtering;

[0018] (2) depositing the material of the upper electrode layer onto the upper substrate by magnetron sputtering;

[0019] (3) preparing a high dielectric insulating material solution, mixing the light absorbing material with the high dielectric insulating material solution, and then coating the mixture on the lower electrode layer or the upper electrode layer, and stacking and assembling the layers to obtain a self-powered sensory neuromorphic system integrating multiple sensory functions;

[0020] The mass ratio of the high dielectric property insulating material to the light absorbing material is 10:1.

[0021] Beneficial effects of the present invention:

[0022] 1. By integrating perception, processing, and power supply into a single self-powered neuromorphic system, efficient and low-energy data processing and computing can be achieved.

[0023] 2. The photoelectric sensitive signal processing layer can not only sense touch, hearing, etc., but also sense light to simulate biological visual functions, enabling a single device to simulate biological multi-sensory functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the working principle of the simulated touch and hearing of the present invention;

[0027] Figure 3 Schematic diagram of the simulated vision working principle of the present invention.

[0028] Figure 4 Schematic diagram of the simulated tactile output response curve of the present invention.

[0029] Figure 5 Schematic diagram of the simulated tactile + visual output response curve of the present invention.

[0030] In the figure: 100, lower substrate; 101, lower electrode layer; 102, high dielectric insulating material; 103, light-absorbing material; 104, upper electrode layer; 105, upper substrate. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0032] like Figure 1 As shown, the self-powered bionic neuromorphic system integrating multiple sensory functions includes a lower substrate 100, a lower electrode layer 101, a photoelectric sensitive signal processing layer (high dielectric performance insulating material 102 + light-absorbing material 103), an upper electrode layer 104, and an upper substrate 105; the upper electrode layer and the lower electrode layer serve as charge transfer electrodes and voltage and current output electrodes of the self-powered bionic neuromorphic system, and the photoelectric sensitive signal processing layer serves as the multi-sensory perception layer and charge transfer layer of the self-powered bionic neuromorphic system, and outputs multiple perception processing signals between the upper electrode and the lower electrode.

[0033] Example 1

[0034] A self-powered sensory neuromorphic system integrating multiple sensory functions, such as Figure 1 As shown, the lower substrate 100 and the upper substrate 105 of the self-powered bionic neuromorphic system are polyethylene terephthalate, the lower electrode layer 101 and the upper electrode layer 104 are metallic copper, the high dielectric performance insulating material 102 in the photoelectric sensitive signal processing layer is polydimethylsiloxane, and the light-absorbing material 103 is nitrogen carbonide.

[0035] The method for preparing the self-powered bionic neuromorphic system comprises the following steps:

[0036] 1. Clean the polyethylene terephthalate substrate. Cut the polyethylene terephthalate into 2cm*2cm squares. Then, clean the substrate with deionized water, ethanol, or other solutions to obtain a clean substrate.

[0037] 2. Prepare the upper and lower electrode layers by sputtering the indium tin oxide material onto a clean polyethylene terephthalate substrate in a vacuum environment using a magnetron sputtering instrument. The thickness of the sputtered indium tin oxide material is 200 nm.

[0038] 3. Preparation of photoelectric sensitive signal processing layer: Prepare polydimethylsiloxane solution (PDMS), use a rubber-tipped dropper to take glue A and glue B (Dow Corning Sylgard 182), where the mass ratio of glue A to glue B is 10:1, and then stir glue A and glue B thoroughly to remove bubbles and set aside; use a pipette to take the fully mixed polydimethylsiloxane solution and MXene solution with a concentration of 10 mg / mL, the mass ratio of the two solutions is 10:1, and stir them thoroughly to remove bubbles, and then use a spin coater to spin coat the stirred and defoamed solution at a speed of 1000 rpm / s for 60 seconds to form a uniform thin film, and finally anneal at 80°C for 12 hours to form a photoelectric sensitive layer with a thickness of 700 μm.

[0039] The working principle of the self-powered bionic neuromorphic system in simulating touch and hearing is as follows: when the upper electrode contacts the photoelectric sensitive signal processing layer, due to the different electronegativity of the two materials, the electrons of the upper electrode are transferred to the surface of the photoelectric signal processing layer where electrons are easily available. At the same time, due to the energy level matching between carbon nitride and polydimethylsiloxane, the obtained electrons are easily transferred to the interior of the carbon nitride and bound there; then, as the number of presses or contacts increases, more and more electrons are bound inside the carbon nitride to form an excitatory postsynaptic voltage. The principle diagram is shown in FIG. Figure 2 shown.

[0040] The test process of the self-powered bionic neuromorphic system in simulating touch is as follows: the upper and lower electrodes of the system are connected through an oscilloscope, and the touch is simulated by a pulse stepping device to achieve contact and separation between the upper electrode and the photoelectric sensitive layer. The voltage signal generated at the same time is recorded by the oscilloscope. The schematic diagram of the tactile output response curve is shown in FIG. Figure 4 shown.

[0041] The working principle of the self-powered bionic neuromorphic system in simulating vision is as follows: when external light shines on the photosensitive signal processing layer, the carbon nitride generates photogenerated electron-hole pairs, which are then bound inside the carbon nitride due to energy level matching. Thereafter, as the number of light exposures increases, more and more electrons are bound inside the carbon nitride to form an excitatory postsynaptic voltage. The principle diagram is shown in FIG. Figure 3 As shown,

[0042] The test process of the self-powered bionic neuromorphic system in simulating touch and vision is as follows: the upper and lower electrodes of the system are connected through an oscilloscope, and the touch is simulated by a pulse stepping device to achieve contact and separation between the upper electrode and the photoelectric sensitive layer. At the same time, a pulse light source is used to simulate visual behavior, and the generated voltage signal is recorded by the oscilloscope. The schematic diagram of the tactile + visual output response curve is shown in FIG. Figure 5 shown.

[0043] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of touch as follows: a small pressure will cause the transfer of surface charge of the self-powered bionic neuromorphic system and be bound in the photoelectric sensitive signal processing layer, ultimately achieving signal output and excitatory postsynaptic voltage;

[0044] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of hearing as follows: the vibration generated by the sound will cause the internal electrodes of the self-powered bionic neuromorphic system to contact with the photoelectric sensitive signal processing layer, thereby achieving surface charge transfer and excitatory postsynaptic voltage;

[0045] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of vision by stimulating the generation of electron-hole pairs in the photoelectric sensitive signal processing layer when irradiating the layer, realizing the transfer of charges and binding them in the photoelectric sensitive signal processing layer, and finally realizing the output of signals and excitatory postsynaptic voltage.

[0046] Example 2

[0047] A self-powered sensory neuromorphic system integrating multiple sensory functions, such as Figure 1 As shown, the lower substrate 100 and the upper substrate 105 of the self-powered bionic neuromorphic system are glass, the lower electrode layer 101 and the upper electrode layer 104 are metallic silver, the high dielectric performance insulating material 102 in the photoelectric sensitive signal processing layer is polydimethylsiloxane, and the light-absorbing material 103 is CdSe / ZnS core-shell structure quantum dots.

[0048] The method for preparing the self-powered bionic neuromorphic system comprises the following steps:

[0049] 1. Clean the glass substrate and cut the glass into 2cm*2cm squares. Then use deionized water, ethanol and other solutions to clean the substrate to obtain a clean substrate.

[0050] 2. Prepare the upper and lower electrode layers. Use a high-temperature vacuum metal evaporation instrument to evaporate silver material onto a clean glass substrate under a vacuum environment. The thickness of the evaporated silver material is 300nm.

[0051] 3. Preparation of photoelectric sensitive signal processing layer: prepare polydimethylsiloxane solution (PDMS), use a glue-tipped dropper to take glue A and glue B (Dow Corning Sylgard 182), where the mass ratio of glue A to glue B is 10:1, and then stir glue A and glue B thoroughly to remove bubbles and set aside; use a pipette to take the fully mixed polydimethylsiloxane solution and a quantum dot solution (CdSe / ZnS core-shell structure quantum dots) with a concentration of 5 mg / mL, the mass ratio of the two solutions is 10:1, and stir them thoroughly to remove bubbles, and then use a spin coater to spin coat the stirred and defoamed solution at a speed of 1500 rpm / s for 60 seconds to form a uniform thin film, and finally anneal at 80°C for 12 hours to form a photoelectric sensitive layer with a thickness of 500 μm.

[0052] The working principle of the self-powered bionic neuromorphic system in simulating touch and hearing is as follows: when the upper electrode contacts the photoelectric sensitive signal processing layer, due to the different electronegativity of the two materials, the electrons of the upper electrode are transferred to the surface of the photoelectric signal processing layer where electrons are easily available. At the same time, due to the energy level matching between quantum dots and polydimethylsiloxane, the obtained electrons are easily transmitted to the interior of the quantum dots and bound there; then, as the number of presses or contacts increases, more and more electrons are bound inside the quantum dots to form an excitatory postsynaptic voltage.

[0053] The working principle of the self-powered bionic neuromorphic system in simulating vision is as follows: when external light shines on the photoelectric sensitive signal processing layer, the quantum dots generate photogenerated electron-hole pairs, which are then bound inside the quantum dots due to energy level matching. Thereafter, as the number of light exposures increases, more and more electrons are bound inside the quantum dots to form excitatory postsynaptic voltage.

[0054] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of touch as follows: a small pressure will cause the transfer of surface charge of the self-powered bionic neuromorphic system and be bound in the photoelectric sensitive signal processing layer, ultimately achieving signal output and excitatory postsynaptic voltage;

[0055] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of hearing as follows: the vibration generated by the sound will cause the internal electrodes of the self-powered bionic neuromorphic system to contact with the photoelectric sensitive signal processing layer, thereby achieving surface charge transfer and excitatory postsynaptic voltage;

[0056] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of vision by stimulating the generation of electron-hole pairs in the photoelectric sensitive signal processing layer when irradiating the layer, realizing the transfer of charges and binding them in the photoelectric sensitive signal processing layer, and finally realizing the output of signals and excitatory postsynaptic voltage.

[0057] Example 3

[0058] A self-powered sensory neuromorphic system integrating multiple sensory functions, such as Figure 1 As shown, the lower substrate 100 and the upper substrate 105 of the self-powered bionic neuromorphic system are silicon dioxide, the lower electrode layer 101 and the upper electrode layer 104 are metallic silver, the high dielectric performance insulating material 102 in the photoelectric sensitive signal processing layer is a polyvinyl alcohol solution, and the light-absorbing material 103 is CdSe / ZnS core-shell structure quantum dots.

[0059] The method for preparing the self-powered bionic neuromorphic system comprises the following steps:

[0060] 1. Clean the silicon dioxide substrate and cut the silicon dioxide into 2cm*2cm squares. Then, use deionized water, ethanol and other solutions to clean the substrate to obtain a clean substrate.

[0061] 2. Prepare the upper and lower electrode layers. Use the spin coating method to spin-coat a 5 mg / ml silver nanowire (AgNWs) solution on the silicon dioxide substrate at a speed of 300 rpm / s for 60 seconds to form a uniform film. Finally, anneal at 120°C for 1 hour to form an electrode layer with a thickness of 200 nm.

[0062] 3. Preparation of photoelectric sensitive signal processing layer: Use a pipette to take polyvinyl alcohol solution (PVA) and quantum dot solution (CdSe / ZnS core-shell structure quantum dots) with a concentration of 5 mg / mL. The mass ratio of the two solutions is 10:1. Stir them thoroughly to remove bubbles. Then, use a spin coater to spin coat the stirred and defoamed solution at a speed of 1500 rpm / s for 60 seconds to form a uniform thin film. Finally, anneal at 80°C for 12 hours to form a photoelectric sensitive layer with a thickness of 500 μm.

[0063] The working principle of the self-powered bionic neuromorphic system in simulating touch and hearing is as follows: when the upper electrode contacts the photoelectric sensitive signal processing layer, due to the different electronegativity of the two materials, the electrons of the upper electrode are transferred to the surface of the photoelectric signal processing layer where electrons are easily available. At the same time, due to the energy level matching between the quantum dots and polyvinyl alcohol, the obtained electrons are easily transmitted to the interior of the quantum dots and bound there; then, as the number of presses or contacts increases, more and more electrons are bound inside the quantum dots to form an excitatory postsynaptic voltage.

[0064] The working principle of the self-powered bionic neuromorphic system in simulating vision is as follows: when external light shines on the photoelectric sensitive signal processing layer, the quantum dots generate photogenerated electron-hole pairs, which are then bound inside the quantum dots due to energy level matching. Thereafter, as the number of light exposures increases, more and more electrons are bound inside the quantum dots to form excitatory postsynaptic voltage.

[0065] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of touch as follows: a small pressure will cause the transfer of surface charge of the self-powered bionic neuromorphic system and be bound in the photoelectric sensitive signal processing layer, ultimately achieving signal output and excitatory postsynaptic voltage;

[0066] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of hearing as follows: the vibration generated by the sound will cause the internal electrodes of the self-powered bionic neuromorphic system to contact with the photoelectric sensitive signal processing layer, thereby achieving surface charge transfer and excitatory postsynaptic voltage;

[0067] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of vision by stimulating the generation of electron-hole pairs in the photoelectric sensitive signal processing layer when irradiating the layer, realizing the transfer of charges and binding them in the photoelectric sensitive signal processing layer, and finally realizing the output of signals and excitatory postsynaptic voltage.

[0068] Example 4

[0069] A self-powered sensory neuromorphic system integrating multiple sensory functions, such as Figure 1 As shown, the lower substrate 100 and the upper substrate 105 of the self-powered bionic neuromorphic system are glass, the lower electrode layer 101 and the upper electrode layer 104 are metallic gold, the high dielectric performance insulating material 102 in the photoelectric sensitive signal processing layer is a conductive ion gel, and the light-absorbing material 103 is cadmium selenide zinc sulfide quantum dots.

[0070] The method for preparing the self-powered bionic neuromorphic system comprises the following steps:

[0071] 1. Clean the glass substrate and cut it into 2cm*2cm squares. Then, clean the substrate with deionized water, ethanol or other solutions to obtain a clean substrate.

[0072] 2. Prepare the upper and lower electrode layers, and use a high-temperature vacuum metal evaporation instrument to evaporate gold material onto a clean glass substrate under a vacuum environment. The thickness of the evaporated gold material is 100 nm.

[0073] 3. Preparation of photoelectric sensitive signal processing layer: Use a pipette to take a conductive ion gel ([EMIM][TFSI]) and a quantum dot solution (CdSe / ZnS core-shell structure quantum dots) with a concentration of 5 mg / mL in a ratio of 10:1, and stir them thoroughly to remove bubbles. Then, use a spin coater to spin coat the stirred and defoamed solution at a speed of 800 rpm / s for 60 seconds to form a uniform thin film. Finally, anneal at 80°C for 12 hours to form a 300 μm photoelectric sensitive layer.

[0074] The working principle of the self-powered bionic neuromorphic system in simulating touch and hearing is as follows: when the upper electrode contacts the photoelectric sensitive signal processing layer, due to the different electronegativity of the two materials, the electrons of the upper electrode are transferred to the surface of the photoelectric signal processing layer where electrons are easily available. The obtained electrons are easily transmitted to the interior of the cadmium selenide zinc sulfide quantum dots and bound there; then, as the number of presses or contacts increases, more and more electrons are bound inside the cadmium selenide zinc sulfide quantum dots to form an excitatory postsynaptic voltage.

[0075] The working principle of the self-powered bionic neuromorphic system in simulating vision is as follows: when external light shines on the photoelectric sensitive signal processing layer, the cadmium selenide zinc sulfide quantum dots generate photogenerated electron-hole pairs, which are then bound inside the cadmium selenide zinc sulfide quantum dots due to energy level matching. Thereafter, as the number of light exposures increases, more and more electrons are bound inside the cadmium selenide zinc sulfide quantum dots to form an excitatory postsynaptic voltage.

[0076] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of touch as follows: a small pressure will cause the transfer of surface charge of the self-powered bionic neuromorphic system and be bound in the photoelectric sensitive signal processing layer, ultimately achieving signal output and excitatory postsynaptic voltage;

[0077] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of hearing as follows: the vibration generated by the sound will cause the internal electrodes of the self-powered bionic neuromorphic system to contact with the photoelectric sensitive signal processing layer, thereby achieving surface charge transfer and excitatory postsynaptic voltage;

[0078] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of vision by stimulating the generation of electron-hole pairs in the photoelectric sensitive signal processing layer when irradiating the layer, realizing the transfer of charges and binding them in the photoelectric sensitive signal processing layer, and finally realizing the output of signals and excitatory postsynaptic voltage.

[0079] Example 5

[0080] A self-powered sensory neuromorphic system integrating multiple sensory functions, such as Figure 1 As shown, the lower substrate 100 and the upper substrate 105 of the self-powered bionic neuromorphic system are glass, the lower electrode layer 101 and the upper electrode layer 104 are metal gold, the high dielectric performance insulating material 102 in the photoelectric sensitive signal processing layer is polyvinylidene fluoride, and the light-absorbing material 103 is carbon nitride.

[0081] The method for preparing the self-powered bionic neuromorphic system comprises the following steps:

[0082] 1. Clean the glass substrate and cut it into 2cm*2cm squares. Then, clean the substrate with deionized water, ethanol or other solutions to obtain a clean substrate.

[0083] 2. Prepare the upper and lower electrode layers, and use a high-temperature vacuum metal evaporation instrument to evaporate gold material onto a clean glass substrate under a vacuum environment. The thickness of the evaporated gold material is 100 nm.

[0084] 3. Preparation of photoelectric sensitive signal processing layer: Use a pipette to take a 10 wt% polyvinylidene fluoride (PVDF) and a 10 mg / mL carbon nitride MXene solution in a mass ratio of 10:1, and stir it thoroughly to remove bubbles. Then, use a spin coater to spin coat the stirred and defoamed solution at a speed of 1000 rpm / s for 60 seconds to form a uniform thin film. Finally, anneal at 80 ° C for 12 hours to form a 1000 μm photoelectric sensitive layer.

[0085] The working principle of the self-powered bionic neuromorphic system in simulating touch and hearing is as follows: when the upper electrode contacts the photoelectric sensitive signal processing layer, due to the different electronegativity of the two materials, the electrons of the upper electrode are transferred to the surface of the photoelectric signal processing layer where electrons are easily available. The obtained electrons are easily transmitted to the interior of the carbonitride and bound there; then, as the number of presses or contacts increases, more and more electrons are bound inside the carbonitride to form an excitatory postsynaptic voltage.

[0086] The self-powered bionic neuromorphic system's operating principle for simulating vision is as follows: When external light shines on the photosensitive signal processing layer, the carbonitride generates photogenerated electron-hole pairs. These pairs are then trapped within the carbonitride due to energy level matching. As the number of light exposures increases, more and more electrons are trapped within the carbonitride, forming an excitatory postsynaptic voltage. The self-powered bionic neuromorphic system simulates the neuromorphic behavior of touch as follows: a slight pressure causes the surface charge of the self-powered bionic neuromorphic system to transfer and be trapped within the photosensitive signal processing layer, ultimately achieving signal output and an excitatory postsynaptic voltage.

[0087] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of hearing as follows: the vibration generated by the sound will cause the internal electrodes of the self-powered bionic neuromorphic system to contact with the photoelectric sensitive signal processing layer, thereby achieving surface charge transfer and excitatory postsynaptic voltage;

[0088] The self-powered bionic neuromorphic system simulates the neuromorphic behavior of vision by stimulating the generation of electron-hole pairs in the photoelectric sensitive signal processing layer when irradiating the layer, realizing the transfer of charges and binding them in the photoelectric sensitive signal processing layer, and finally realizing the output of signals and excitatory postsynaptic voltage.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-powered sensory neuromorphic system integrating multiple sensory functions, characterized in that: It includes a lower substrate, a lower electrode layer, a photoelectric sensitive signal processing layer, an upper electrode layer, and an upper substrate; the photoelectric sensitive signal processing layer is made of a mixture of high dielectric performance insulating material and light absorbing material.

2. The self-powered sensory neuromorphic system integrating multiple sensory functions according to claim 1, characterized in that: The lower substrate is a rigid substrate or a flexible substrate, and the material of the lower substrate is any one of polyethylene terephthalate, glass, silicon dioxide, and polyimide.

3. The self-powered sensory neuromorphic system integrating multiple sensory functions according to claim 1, characterized in that: The material of the lower electrode layer is one or two of gold, silver, copper, aluminum, indium tin oxide, and silver nanowires, and a wire is led out as an external electrode.

4. The self-powered sensory neuromorphic system integrating multiple sensory functions according to claim 1, characterized in that: The high dielectric performance insulating material is one or a combination of two or more of conductive ion gel, polyvinyl alcohol, polydimethylsiloxane, polysilsileoxane, polyvinylidene fluoride, polyethylene glycol dimethacrylate, and polyhydroxyethyl methacrylate.

5. The self-powered sensory neuromorphic system integrating multiple sensory functions according to claim 1, characterized in that: The light-absorbing material is one or a combination of two or more of nitrogen carbonide, sulfide, boride, cadmium selenide zinc sulfide quantum dots, perovskite quantum dots, metal organic framework materials, and covalent organic framework materials.

6. The self-powered sensory neuromorphic system integrating multiple sensory functions according to claim 1, characterized in that: The material of the upper electrode layer is one or two of gold, silver, copper, aluminum, indium tin oxide, and silver nanowires.

7. The self-powered sensory neuromorphic system integrating multiple sensory functions according to claim 1, characterized in that: The upper substrate is a rigid substrate or a flexible substrate, and the material of the upper substrate is any one of polyethylene terephthalate, glass, silicon dioxide, and polyimide.

8. The self-powered sensory neuromorphic system integrating multiple sensory functions according to claim 1, characterized in that: The thickness of the lower electrode layer is 100-500 nm; the thickness of the upper electrode layer is 100-500 nm; and the thickness of the photoelectric sensitive signal processing layer is 200 μm-1000 μm.

9. A method for preparing a self-powered sensory neuromorphic system integrating multiple sensory functions, characterized in that: It includes a series of steps: (1) depositing the material of the lower electrode layer onto the lower substrate by magnetron sputtering; (2) depositing the material of the upper electrode layer onto the upper substrate by magnetron sputtering; (3) A high dielectric insulating material solution is prepared, the light-absorbing material and the high dielectric insulating material solution are mixed, and then coated on the lower electrode layer or the upper electrode layer, and stacked and assembled to obtain a self-powered sensory neuromorphic system integrating multiple sensory functions.

10. The method for preparing a self-powered sensory neuromorphic system integrating multiple sensory functions according to claim 9, characterized in that: The mass ratio of the high dielectric performance insulating material to the light absorbing material is 10:0.001-0.01.

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