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首页> 外文期刊>Advanced Functional Materials >Improving Electrical Stability and Ideality in Organic Field-Effect Transistors by the Addition of Fullerenes: Understanding the Working Mechanism
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Improving Electrical Stability and Ideality in Organic Field-Effect Transistors by the Addition of Fullerenes: Understanding the Working Mechanism

机译：通过添加富勒烯提高有机场效应晶体管的电稳定性和理想性：了解其工作机理

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摘要

Electrical instability and nonideality due to undesirable electron injection are often-encountered problems for high-mobility organic field-effect transistors (OFETs) with low-bandgap polymer semiconductors. Due to electron trapping and the resulting accumulation of negative charges on the silicon dioxide dielectric, transfer curves deviate from ideality characteristics and double-slopes are observed as the devices are operated for extended periods of time. One way to circumvent those is to use an electron-acceptor additive, such as fullerene and its derivatives. This work interprets the mechanisms of how fullerene derivatives suppress electron transport and electrical instability while maintaining high hole mobility in p-type OFETs. This study shows that hole transport of the active layer is uninterrupted upon the addition of the electron acceptors. Most importantly, the added fullerene derivatives out-compete SiO2 to acquire electrons that are injected into the polymers. Electrical instability and double-slope induced from electron trapping at SiO2 surface are thereby suppressed.
机译：对于具有低带隙聚合物半导体的高迁移率有机场效应晶体管（OFET），由于不希望的电子注入而引起的电不稳定和不理想是经常遇到的问题。由于电子的俘获以及由此产生的负电荷在二氧化硅电介质上的积累，转移曲线偏离了理想特性，并且在器件长时间运行时观察到双斜率。解决这些问题的一种方法是使用电子受体添加剂，例如富勒烯及其衍生物。这项工作解释了富勒烯衍生物如何抑制电子传输和电不稳定性，同时在p型OFET中保持高空穴迁移率的机理。这项研究表明，在添加电子受体后，有源层的空穴传输不会中断。最重要的是，添加的富勒烯衍生物可以与SiO2竞争，从而获得注入到聚合物中的电子。从而抑制了由于电子在SiO2表面捕获而引起的电不稳定性和双斜率。

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  • 来源
    《Advanced Functional Materials》 |2017年第38期|1701358.1-1701358.8|共8页
  • 作者

    Phan Hung; Ford Michael J.; Lill Alexander T.; Wang Ming; Bazan Guillermo C.; Thuc-Quyen Nguyen;

  • 作者单位

    Univ Calif Santa Barbara, Ctr Polymer & Organ Solids, Mitsubishi Chem Ctr Adv Mat, Santa Barbara, CA 93106 USA;

    Univ Calif Santa Barbara, Ctr Polymer & Organ Solids, Mitsubishi Chem Ctr Adv Mat, Santa Barbara, CA 93106 USA;

    Univ Calif Santa Barbara, Ctr Polymer & Organ Solids, Mitsubishi Chem Ctr Adv Mat, Santa Barbara, CA 93106 USA;

    Univ Calif Santa Barbara, Ctr Polymer & Organ Solids, Mitsubishi Chem Ctr Adv Mat, Santa Barbara, CA 93106 USA;

    Univ Calif Santa Barbara, Ctr Polymer & Organ Solids, Mitsubishi Chem Ctr Adv Mat, Santa Barbara, CA 93106 USA;

    Univ Calif Santa Barbara, Ctr Polymer & Organ Solids, Mitsubishi Chem Ctr Adv Mat, Santa Barbara, CA 93106 USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    conjugated polymers; double slopes; fullerene additives; organic fieldeffect transistors; stability;

    机译：共轭聚合物;双斜率;富勒烯添加剂;有机场效应晶体管;稳定性;

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