Fabrication of Flexible Double-Gate Organic Thin Film Transistor For Tactile Applications

IF 6.4 3区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Advanced Materials Technologies Pub Date : 2024-07-15 DOI:10.1002/admt.202400534
Mattia Concas, Antonello Mascia, Stefano Lai, Annalisa Bonfiglio, Piero Cosseddu
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Abstract

In this work, the development of a flexible Double-Gate (DG) organic thin film transistor (DG-OTFT), and its employment is reported for the realization of multimodal tactile sensors. Due to the self-encapsulation of the stacked DG architecture, highly stable organic transistors are obtained that show almost negligible degradation after 6 months. Moreover, such configuration is also very useful for the development of sensing devices. In the case, one of the two gates is used to bias and set the working point of the devices, whereas the second one is connected to a polyvinylidene fluoride(PVDF)-capacitor, a pyro/piezoelectric material. It is demonstrated that the charge displacement induced by the PVDF capacitor due to an applied external pressure or due to a temperature variation led to a reproducible variation of the device's output current. Using this approach high-performing multimodal tactile sensors are obtained with sensitivity to up to 241 nA N−1 and 442 nA °C−1 respectively.

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制作用于触觉应用的柔性双栅有机薄膜晶体管
本研究报告介绍了柔性双栅(DG)有机薄膜晶体管(DG-OTFT)的开发及其在实现多模态触觉传感器中的应用。由于堆叠式 DG 结构具有自封装功能,因此获得的有机晶体管非常稳定,6 个月后的降解几乎可以忽略不计。此外,这种结构对于开发传感设备也非常有用。在这种情况下,两个栅极中的一个用于偏置和设置器件的工作点,而第二个栅极则与聚偏二氟乙烯(PVDF)电容器(一种热释电/压电材料)相连。实验证明,聚偏二氟乙烯(PVDF)电容器因外部压力或温度变化而产生的电荷位移会导致设备输出电流发生可重复的变化。利用这种方法获得的高性能多模态触觉传感器的灵敏度分别高达 241 nA N-1 和 442 nA ℃-1。
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来源期刊
Advanced Materials Technologies
Advanced Materials Technologies Materials Science-General Materials Science
CiteScore
10.20
自引率
4.40%
发文量
566
期刊介绍: Advanced Materials Technologies Advanced Materials Technologies is the new home for all technology-related materials applications research, with particular focus on advanced device design, fabrication and integration, as well as new technologies based on novel materials. It bridges the gap between fundamental laboratory research and industry.
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