Intrinsically Stretchable Subthreshold Organic Transistors for Highly Sensitive Low‐Power Skin‐Like Active‐Matrix Temperature Sensors

Kim, Jun Su; Jeong, Min Woo; Nam, Tae Uk; Vo, Ngoc Thanh Phuong; Jung, Kyu Ho; Lee, Tae Il; Oh, Jin Young

doi:10.1002/adfm.202305252

Cited by 10 publications

(2 citation statements)

References 50 publications

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“…The memory on/off ratio and memory window of the devices remained virtually unchanged under all of the investigated ambient conditions. In addition, the device exhibited reliable memory performance by maintaining a memory on/off ratio greater than 10 4 and a memory window greater than 10 V, with no alteration in the activation energy for writing, 38 across the entire temperature range from −30 to 60 °C, which represents the temperature fluctuations of all four seasons (Figures 4c, S33, and S34). The drift in the temperature test is attributed to thermally activated hopping within a Gaussian distribution of localized states in semicrystalline or disordered polymer semiconductors.…”

Section: Resultsmentioning

confidence: 98%

Intrinsically Stretchable Floating Gate Memory Transistors for Data Storage of Electronic Skin Devices

Nam,

Vo,

Jeong

et al. 2024

ACS Nano

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To propel electronic skin (e-skin) to the next level by integrating artificial intelligence features with advanced sensory capabilities, it is imperative to develop stretchable memory device technology. A stretchable memory device for e-skin must offer, in particular, long-term data storage while ensuring the security of personal information under any type of deformation. However, despite the significance of these needs, technology related to stretchable memory devices remains in its infancy. Here, we report an intrinsically stretchable floating gate (FG) polymer memory transistor. The device features a dual-stimuli (optical and electrical) writing system to prevent easy erasure of recorded data. An FG comprising an intermixture of Ag nanoparticles and elastomer and with proper energy-band alignment between the semiconductor and dielectric facilitated sustainable memory performance, while achieving a high memory on/off ratio (>10 5 ) and a long retention time (10 6 s) with the ability to withstand 50% uniaxial or 30% biaxial strain. In addition, our memory transistor exhibited high mechanical durability over multiple stretching cycles (1000 times), along with excellent environmental stability with respect to factors such as temperature, moisture, air, and delamination. Finally, we fabricated a 7 × 7 active-matrix memory transistor array for personalized storage of e-skin data and successfully demonstrated its functionality.

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Section: Resultsmentioning

confidence: 98%

Intrinsically Stretchable Floating Gate Memory Transistors for Data Storage of Electronic Skin Devices

Nam,

Vo,

Jeong

et al. 2024

ACS Nano

Self Cite

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“…(a) 基于复合有机半导体结构的有机晶体管器件结构图. (b, c) DPPT-TT:SEBS薄膜表面形貌图和基于该混合薄膜的OFET随温度变化的电流信号[48] . (d) 基于绝缘层设计发展的有机晶体管器件结构图.…”

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具有触觉感知功能的有机晶体管研究进展

Zhang,

Jiang,

Xiang

et al. 2024

Sci. Sin.-Chim

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Advancements in the research of organic bioelectronics, bridging organic optoelectronic devices primarily based on electronic transport with biological systems dominated by ion signals, are considered crucial areas for constructing the next generation of artificial intelligence systems. Organic transistors (OFET) exhibit unique optoelectronic properties by modulating the semiconductor's conductivity through field-induced or electrochemical ion doping. Leveraging their flexibility, excellent solubility for processing, and significant biocompatibility, organic transistors have become excellent platforms for building organic intelligent sensing devices. Over the past decade, research on tactile perception organic transistors, focusing on the development of functional materials, device structures, and the integration of biological, physical signal sensing, and synaptic functionalities, has garnered widespread attention and rapid progress. In this paper, we provide an overview of the progress in tactile perception functionalization of organic transistors, covering aspects such as the design of device structures, working principles, and fabrication techniques that enable the conversion, transmission, and processing of physical signals. We emphasize the development and current applications in temperature/pressure sensing, synaptic, and neural learning, summarize the research strategies for the next generation of tactile perception organic transistors, along with the prospect for challenges and opportunities.

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Stretchable Multifunctional Polydimethylsiloxane Composites with Cage‐Like Conductive Architecture for Integrated Thermosensitive and Electromagnetic Interference Shielding Performance

Tian,

Qin,

et al. 2024

Adv Funct Materials

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High‐performance sensors with outstanding sensitivity, wide working range, and multifunctional properties are highly desirable in modern integrated smart wearable electronics. Herein, polydimethylsiloxane (PDMS)‐based stretchable pyroresistive sensors composed of tightly‐assembled silver nanowires (Ag NWs)‐encapsulated PDMS microspheres (PM) and expandable microspheres (EM) are fabricated. The synergistic cage‐like conductive network and EM endow the temperature sensor with tunable sensitivity (Max TCR: 27.4% °C−1), broad sensing range (25–85 °C), low perception limit (0.1 °C), and excellent anti‐interference ability. Interestingly, at elevated temperature field (> 90 °C), a remarkable conduction‐insulation transition is observed, which is employed to facilitate an early fire alarm system. In addition, the selectively distributed Ag NWs constructs segregated conductive pathways at an ultralow content (Pc = 0.014 vol%), leading to efficient electromagnetic interference shielding (40.0 dB). The underlying mechanism responsible for the observed superior thermosensation and EMI shielding performance is elucidated, and possible applications are demonstrated. Consequently, this work offers a novel strategy for the design of flexible, multifunctional pyroresistive sensors toward artificial intelligence and emerging wearable electronics.

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Intrinsically Stretchable Subthreshold Organic Transistors for Highly Sensitive Low‐Power Skin‐Like Active‐Matrix Temperature Sensors

Cited by 10 publications

References 50 publications

Intrinsically Stretchable Floating Gate Memory Transistors for Data Storage of Electronic Skin Devices

Intrinsically Stretchable Floating Gate Memory Transistors for Data Storage of Electronic Skin Devices

具有触觉感知功能的有机晶体管研究进展

Stretchable Multifunctional Polydimethylsiloxane Composites with Cage‐Like Conductive Architecture for Integrated Thermosensitive and Electromagnetic Interference Shielding Performance

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