Intrinsically flexible organic phototransistors for bioinspired neuromorphic sensory system

Wearable electronics., Journal Year: 2024, Volume and Issue: 1, P. 41 - 52

Published: May 13, 2024

With the development of Human-Computer Interaction and Internet Things applications, bioinspired wearable electronics have gained extensive attention. In view low-cost availability, multifunctional bionic simulation free deformation properties, phototransistor-based intrinsically flexible organic neuromorphic devices arrays become a compelling arena for both academic industrial to realize next-generation intelligent equipment. Recently, rapidly evolving materials sophisticated structural designs enabled such with optical-event-driven operations multi-task parallel processing. multifunctionality simultaneously acquire, compute, adapt vast majority external information, put forward intelligence, artificial vision neuro-prosthetics. this review, we first provide brief overview recent advances in design strategies devices, including field-effect phototransistors electrochemical transistors. Then, analyze emerging optoelectronics their applications. Finally, discuss outlook challenges transistor-based from potential photoactive manufacturability monofunctional devices. The foreseeable evolution towards fully integrated systems is further summarized future optoelectronics.

Language: Английский

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Bionic Olfactory Synaptic Transistors for Artificial Neuromotor Pathway Construction and Gas Recognition

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(36)

Published: April 22, 2024

Abstract The superior recognition ability and excitatory–inhibitory balance of the olfactory system has important applications in efficient recognition, analysis, processing data. In this study, transistor synaptic devices are prepared utilizing poly‐diketo‐pyrrolopyrrole‐selenophene polymer (PTDPPSe‐5Si) with excellent electrical properties as active layer, dual‐gas pulses applied for first time to simulate excitatory inhibitory behaviors system. Basic successfully simulated, such excitatory/inhibitory postsynaptic currents (EPSC/IPSC), long‐term potentiation/depression (LTP/LTD). regulation biomimetic olfaction is simulated. This working mechanism attributed capture release carriers channel induced by gas's electron‐donating electron‐withdrawing characteristics. neuromotor pathway constructed using key unit, which enables integration information from neurons output motor neurons. A convolutional neural network achieve eight common laboratory gas types concentrations a accuracy over 97%. simulated exhibited device hold significant importance development artificial networks, intelligent frameworks, robots.

Language: Английский

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Flexible Neuromorphic Electronics for Wearable Near‐Sensor and In‐Sensor Computing Systems

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 19, 2025

Abstract Flexible neuromorphic architectures that emulate biological cognitive systems hold great promise for smart wearable electronics. To realize neuro‐inspired sensing and computing electronics, artificial sensory neurons detect process external stimuli must be integrated with central nervous capable of parallel computation. In near‐sensor computing, synaptic devices, sensors are used to receptors, respectively. contrast, in in‐sensor a single multifunctional device serves as both the receptor neuron. Bio‐inspired efficiently through data structuring techniques, significantly reducing volume enabling extension applications systems. construct near‐ it is crucial develop synapses replicate functionalities. Additionally, exhibit high mechanical flexibility integration density. This review addresses research on flexible bio‐inspired systems, classified into computing. It covers fundamental aspects, including processes, required components, structures each component, well Finally, offers perspectives future directions electronics connected next‐generation Internet Things.

Language: Английский

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Emerging Artificial Synaptic Devices Based on Organic Semiconductors: Molecular Design, Structure and Applications

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

In modern computing, the Von Neumann architecture faces challenges such as memory bottleneck, hindering efficient processing of large datasets and concurrent programs. Neuromorphic inspired by brain's architecture, emerges a promising alternative, offering unparalleled computational power while consuming less energy. Artificial synaptic devices play crucial role in this paradigm shift. Various material systems, from organic to inorganic, have been explored for neuromorphic devices, with materials attracting attention their excellent photoelectric properties, diverse choices, versatile preparation methods. Organic semiconductors, particular, offer advantages over transition-metal dichalcogenides, including ease flexibility, making them suitable large-area films. This review focuses on emerging artificial based discussing different branches within semiconductor system, various fabrication methods, device structure designs, applications synapse. Critical considerations achieving truly human-like dynamic perception systems semiconductors are also outlined, reflecting ongoing evolution computing.

Language: Английский

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Constructing Perovskite Organic Phototransistors Using a Triple Strategy to Achieve Visible and NIR Visual Synapses and Adaptive Functions

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Abstract Photoelectric synaptic transistors have the advantages of high bandwidth, signal‐to‐noise ratio, low power consumption, and crosstalk, which are crucial for development artificial visual perception systems. However, photoelectric problems such as light sensitivity, narrow detection poor adaptability to biological light. Here, a ternary strategy is employed combine 2D perovskite with infrared polymeric material poly (n‐alkylpyrrole dithiophene) (PDPP‐DTT, abbreviated PDPP) small molecular PC 61 BM fabricated visible wide spectrum phototransistor, has both function adaptative functions. The introduction PDPP:PC organic heterojunction promotes separation injection photogenerated carriers in phototransistors, leading photosensitivity light, achieving 4.9 × 10 5 1.9 , respectively. Gate voltage, intensity, defects heterojunctions can regulate concentration charge transistors, allowing device array mimic synapses adaptive functions under red, green, blue NIR triple fabricating provides technical support multifunctional vision

Language: Английский

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Self-Powered and Broadband Optical Synapse Device Based on Se-Vacancy Bi₂O₂Se for Artificial Vision System Application

ACS Photonics, Journal Year: 2024, Volume and Issue: 11(11), P. 4990 - 4999

Published: Oct. 16, 2024

The optical synaptic devices, inspired by the human visual system and capable of emulating biological behaviors, have demonstrated significant potential for artificial vision applications. However, contemporary devices are hindered several limitations, including a narrow response range, intricate structures, compromised stability, substantial energy demands. Herein, large single-crystal Bi2O2Se nanosheets with selenium vacancies (Bi2O2Se–VSe) were synthesized via physical vapor deposition. Based on Bi2O2Se–VSe nanosheet, self-powered, broadband device was developed simply straightforward asymmetric contact approach. proficiently replicates functionalities without any electrical power requirement. Furthermore, an comprising 5 × array self-powered constructed. Under illumination at wavelengths 350, 532, 1050 nm 100 s, intensity image pattern can be kept high memory level 94.91%, 44.92%, 12.83% after attenuation which demonstrates excellent sensing, learning, storage properties. This research paves way further exploration contributes novel insights into development systems.

Language: Английский

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High sensitivity artificial synapses using printed high-transmittance ITO fibers for neuromorphic computing

Chinese Chemical Letters, Journal Year: 2024, Volume and Issue: 35(12), P. 110030 - 110030

Published: May 20, 2024

Language: Английский

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Flexible optoelectronic N-I-P synaptic device with visible spectrum perception for energy-efficient artificial vision and efferent neuromuscular system

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 125(8)

Published: Aug. 19, 2024

We have designed a flexible photoelectric artificial synapse with an oxide/mixed perovskite/polymer N-I-P structure that exhibits essential synaptic plasticity. Formamidinium lead triiodide FAPbI3 perovskite doped bromine and methylammonium (FAxMA1−xPbI2Br) is employed as the intrinsic layer to improve optical properties of devices. Without requiring power source in reaction outside spikes, multiple pulse-dependent plasticity reproduced on devices, image's edges are sharpened using high-pass filtering. Additionally, classical conditioning spatiotemporal learning copied under electric pulse excitation. Significant negative differential resistance evident, even after 1500 flex/flat mechanical operation. The recognition rate letters visual system high 92%, walking distance efferent neuromuscular controllable. optoelectronic device facilitate energy-efficient information processing for neuromorphic computing.

Language: Английский

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A Violet‐Light‐Responsive ReRAM Based on Zn₂SnO₄/Ga₂O₃ Heterojunction as an Artificial Synapse for Visual Sensory and In‐Memory Computing

Advanced Electronic Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 9, 2024

Abstract Due to the imitation of neural functionalities human brain via optical modulation resistance states, photoelectric resistive random access memory (ReRAM) devices attract extensive attraction for synaptic electronics and in‐memory computing applications. In this work, a ReRAM (PSR) structure ITO/Zn 2 SnO 4 /Ga O 3 /ITO/glass with simple fabrication process is reported imitate plasticity. Electrically induced long‐term potentiation/depression (LTP/D) behavior indicates fulfillment fundamental requirement artificial neuron devices. Classification three‐channeled images corrupted different levels (0.15–0.9) Gaussian noise achieved by simulating convolutional network (CNN). The violet light (405 nm) illumination generates excitatory post current (EPSC), which influenced persistent photoconductivity (PPC) effect after discontinuing excitation. As an device, PSR able some basic functions such as multi‐levels linearly increasing trend, learning‐forgetting‐relearning behavior. same device also shows emulation visual persistency optic nerve skin‐damage warning. This executes high‐pass filtering function demonstrates its potential in image‐sharpening process. These findings provide avenue develop oxide semiconductor‐based multifunctional advanced systems.

Language: Английский

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Revealing the Effect of Crystalline Self-Assembled Monolayer in Biomimetic Photosynapse with Ultraviolet Light Protection Capability

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

The research on photonic synapses holds immense promise for various applications, such as robotics and artificial intelligence. Pursuing lightweight, miniaturized, low-energy consumption designs is crucial enhancing efficiency adaptability in evolving technological environments. To achieve this goal, work a series of conjugated self-assembled molecules with photoactive pyrene, benzo-naphthol-thiophene (BNT), perylene, benzothieno-benzothiophene cores to develop ultrathin (<3 nm) charge-trapping monolayers (SAMs). highly crystalline BNT forms an orderly arrangement the semiconducting channel, further exhibiting distinguished current contrast stability (∼10

Language: Английский

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