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arXiv 1612.04232cond-mat.mtrl-sci
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工作频率为20 MHz的直写polymer场效应晶体管

Direct-written polymer field-effect transistors operating at 20 MHz

Andrea Perinot, Prakash Kshirsagar, Maria Ada Malvindi, Pier Paolo Pompa, Roberto Fiammengo, Mario Caironi

摘要:

印刷聚合物电子产品长期以来一直致力于为可穿戴设备、医疗保健、诊断、自动化和便携式设备提供分布式、灵活、轻便和具有成本效益的应用,从而实现技术革命。虽然在有机半导体迁移率方面已经取得了令人印象深刻的进展,但场效应晶体管(FET),任何电路的基本构建块,仍然显示出有限的操作速度,从而限制了它们的实际应用。到目前为止,利用有机FET来实现数十MHz范围(包括驱动高分辨率显示器的许多应用的阈值)的尝试依赖于采用复杂的光刻技术和/或复杂的架构,破坏了整个概念。在这项工作中,我们展示了聚合物场效应晶体管,它可以工作到20 MHz,并通过可扩展的印刷技术和直接写入方法与一个完全无掩模的程序。这是通过结合一个fs激光工艺烧结高分辨率金属电极,从而很容易实现微米级的通道,降低寄生低至0.19 pF mm-1,和大面积的高迁移率聚合物半导体涂层技术,根据一个简单的和可扩展的工艺流程。

英文摘要:

Printed polymer electronics has held for long the promise of revolutionizing technology by delivering distributed, flexible, lightweight and cost-effective applications for wearables, healthcare, diagnostic, automation and portable devices. While impressive progresses have been registered in terms of organic semiconductors mobility, field-effect transistors (FET), the basic building block of any circuit, are still showing limited speed of operation, thus limiting their real applicability. So far, attempts with organic FET to achieve the tens of MHz regime, a threshold for many applications comprising the driving of high resolution displays, have relied on the adoption of sophisticated lithographic techniques and/or complex architectures, undermining the whole concept. In this work we demonstrate polymer FETs which can operate up to 20 MHz and are fabricated by means only of scalable printing techniques and direct-writing methods with a completely mask-less procedure. This is achieved by combining a fs-laser process for the sintering of high resolution metal electrodes, thus easily achieving micron-scale channels with reduced parasitism down to 0.19 pF mm-1, and a large area coating technique of a high mobility polymer semiconductor, according to a simple and scalable process flow.

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