Low-Voltage, Flexible, and Self-Encapsulated Ultracompact Organic Thin-Film Transistors Based on Nanomembranes.
Low-Voltage, Flexible, and Self-Encapsulated Ultracompact Organic Thin-Film Transistors Based on Nanomembranes.
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DOI：
10.1021/acs.nanolett.8b01958
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发表时间：
2018-08
期刊：
影响因子：
10.8
通讯作者：
Kleyton Torikai;Rafael Furlan de Oliveira;Davi H Starnini de Camargo;C. C. Bof Bufon-C.
中科院分区：
文献类型：
--
作者：
Kleyton Torikai;Rafael Furlan de Oliveira;Davi H Starnini de Camargo;C. C. Bof Bufon-C.
有机薄膜晶体管(OTFT)是一个不断增长的研究课题，为柔性和可穿戴电子等最新技术提供动力。目前，许多研究正在推进最先进的OTFT技术，以实现高载波移动性、低功耗、灵活性和在恶劣条件下工作的能力。在这里，我们通过提出一种新颖的OTFT结构来解决这一问题，该结构探索了所谓的卷起纳米膜技术来制备低电压(<；2V)、超致密的OTFT。作为OTFT栅极，我们使用应变纳米膜，它允许所有晶体管组件卷起并限制在管状三维器件结构中，占地面积减少(约为平面对应器件的90%)，而不会损失任何电气性能。这种创新的架构赋予了OTFT极高的机械灵活性(弯曲半径为30μm)和坚固耐用--该设备可进行可逆变形，可承受500多次径向压缩/减压循环。此外，管状器件设计具有固有的自封装特性，可保护OTFT有源区免受紫外线和有害蒸汽的破坏。所报道的策略也被证明与不同的有机半导体材料兼容。所有这些特性有助于进一步扩展OTFT的潜力，主要是在坚固耐用的电子设备方面。
Organic thin-film transistors (OTFTs) are an ever-growing subject of research, powering recent technologies such as flexible and wearable electronics. Currently, many studies are being carried out to push forward the state-of-the-art OTFT technology to achieve characteristics that include high carrier mobility, low power consumption, flexibility, and the ability to operate under harsh conditions. Here, we tackle this task by proposing a novel OTFT architecture exploring the so-called rolled-up nanomembrane technology to fabricate low-voltage (<2 V), ultracompact OTFTs. As the OTFT gate electrode, we use strained nanomembranes, which allows all transistor components to be rolled-up and confined into a tubular-shaped tridimensional device structure with reduced footprint (ca. 90% of their planar counterpart), without any loss of electrical performance. Such an innovative architecture endows the OTFTs high mechanical flexibility (bending radius of <30 μm) and robustness-the devices can be reversibly deformed, withstanding more than 500 radial compression/decompression cycles. Additionally, the tubular device design possesses an inherent self-encapsulation characteristic that protects the OTFT active region from degradation by UV-light and hazardous vapors. The reported strategy is also shown to be compatible with different organic semiconductor materials. All of these characteristics contribute to further extending the potentialities of OTFTs, mainly toward rugged electronics.