All‐Photolithography Fabrication of Ion‐Gated Flexible Organic Transistor Array for Multimode Neuromorphic Computing

Liu, Xu; Dai, Shilei; Zhao, Weidong; Zhang, Junyao; Guo, Ziyi; Wu, Yue; Xu, Yutong; Sun, Tongrui; Li, Li; Guo, Pu; Yang, Jie; Hu, Huawei; Zhou, Junhe; Zhou, Peng; Huang, Jia

doi:10.1002/adma.202312473

Cited by 12 publications

(1 citation statement)

References 86 publications

(94 reference statements)

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“…The PEO gel consisting of ionic liquid (IL) 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM] + [TFSI] − ) was served as the ion-gel with high ionic conductivity. The ion-gel electrolyte prepared by UV curing mitigates the adsorption and desorption of gas molecules in the semiconductor layer, to retain the memory characteristics long-termly Figure S1 displays the molecular structure of organic semiconductor p(g2T-T) and ion-gel.…”

Section: Results and Discussionmentioning

confidence: 99%

In-Sensor Organic Electrochemical Transistor for the Multimode Neuromorphic Olfactory System

Yin,

Sun,

Wang

et al. 2024

ACS Sens.

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The olfactory system is one of the six basic sensory nervous systems. Developing artificial olfactory systems is challenging due to the complexity of chemical information decoding and memory. Conventional chemical sensors can convert chemical signals into electric signals to decode gas information but they lack memory functions. Additional storage and processing units would significantly increase the complexity and power consumption of the devices, especially for portable and wearable devices. Here, an olfactory-inspired in-sensor organic electrochemical transistor (OI-OECT) is proposed, with the integrated functions of chemical information decoding, tunable memory level, and selectivity of vapor sensing. The ion-gel electrolyte endows the OI-OECT with the function of tunable memory levels and a low operating voltage. Typical synaptic behaviors, including inhibitory postsynaptic current and paired-pulse facilitations, are successfully achieved. Importantly, the gas memory level can be effectively modulated by the gate voltages (0 and −1 V), which realized the transformation of volatile and nonvolatile memory. Furthermore, benefiting from the recognition of multiple gases and ability to detect cumulative damage caused by gases, the OI-OECT is demonstrated for early warning system targeting leakage detection of two gases (NH 3 and H 2 S). This work achieves the integrated functions of chemical gas information decode, tunable gas memory level, and selectivity of gas in a single device, which provides a promising pathway for the development of future artificial olfactory systems.

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Section: Results and Discussionmentioning

confidence: 99%

In-Sensor Organic Electrochemical Transistor for the Multimode Neuromorphic Olfactory System

Yin,

Sun,

Wang

et al. 2024

ACS Sens.

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Drosophila Visual System Inspired Ambipolar OFET for Motion Detection

Xie,

Leng,

Sun

et al. 2024

Adv Funct Materials

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Drosophila can rapidly and precisely detect changes in light in their surroundings and achieve acute perception of motion information with high energy efficiency and adaptivity owing to the cooperation of “ON” channel and the “OFF” channel in its visual system. Optical controlled bidirectional synaptic behavior of neuromorphic device is important for modeling parallel processing channels of Drosophila's visual system. In this study, an ambipolar transistor utilizing a bilayer architecture composed of p‐type pentacene and n‐type C60 as semiconductors is developed, with near‐infrared (NIR) PbS quantum dots serving as the charge‐trapping layer. This design enables a gate‐tunable positive and negative photoresponse, driven by photogating and photovoltaic effects at visible and NIR wavelengths. When regulated by a negative gate voltage, the device exhibits a suppressed photocurrent relaxation time exceeding 1000 s, demonstrating stable long‐term inhibitory characteristics. Consequently, high‐contrast excitatory and inhibitory synapses facilitate orientation and motion detection. Identification accuracies of up to 94.8% for motion direction and 98.1% for dynamic gestures are achieved. Practical applications such as intelligent monitoring and human–computer interaction stand to benefit significantly from these findings.

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All‐Polymer Organic Electrochemical Synaptic Transistor With Controlled Ionic Dynamics for High‐Performance Wearable and Sustainable Reservoir Computing

He,

Ge,

et al. 2024

Adv Funct Materials

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Wearable near/in‐sensor neuromorphic computing is driving next‐generation human‐artificial intelligence (AI) interface, the Internet of Things, and intelligent robots, with reservoir computing (RC) playing a pivotal role in advancing AI hardware, yet its potential remains underexplored. Herein, an all‐polymer accumulation‐mode organic electrochemical synaptic transistor (OEST) is demonstrated with controlled ionic dynamics that can facilitate high‐performance wearable RC while allowing entire recyclability. A microporous glycolated conjugated polymer channel (P3gCPDT‐1gT2) affords current output above mA level at <1 V and enables both volatile and non‐volatile modes in combination with soft poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)/sorbitol electrodes and electrolytes (gelatin/glycerol). Particularly, modulation of the volatile OESTs as nonlinear dynamic reservoirs are elucidated by tuning ionic dynamics with applied voltages and gel compositions. Moreover, such an all‐polymer device exhibits synaptic performance preservation over >3000 bending cycles and allows convenient recyclability using eco‐friendly solvents. A wearable and sustainable RC system can be thus established by configuring the volatile units for data processing and the nonvolatile units as the weight storage in a single‐layer perceptron readout. Such a simple platform achieves up to 90% accuracy in voice recognition tasks under bending. Thus, this work facilitates the widespread integration of multifunctional organic electronic hardware for implementing intelligent information processing with low‐cost, body‐conformable, and eco‐benign features.

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All‐Photolithography Fabrication of Ion‐Gated Flexible Organic Transistor Array for Multimode Neuromorphic Computing

Cited by 12 publications

References 86 publications

In-Sensor Organic Electrochemical Transistor for the Multimode Neuromorphic Olfactory System

In-Sensor Organic Electrochemical Transistor for the Multimode Neuromorphic Olfactory System

Drosophila Visual System Inspired Ambipolar OFET for Motion Detection

All‐Polymer Organic Electrochemical Synaptic Transistor With Controlled Ionic Dynamics for High‐Performance Wearable and Sustainable Reservoir Computing

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