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Inkjet printed thin and uniform dielectrics for capacitors and organic thin film transistors enabled by the coffee ring effect

机译：通过咖啡环效应实现电容器和有机薄膜晶体管的喷墨印刷薄而均匀的电介质

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摘要

The deposition of a thin and uniform dielectric layer is required for high performance printed capacitors and thin film transistors (TFTs), however this is difficult to achieve with printing methods. We have demonstrated inkjet-printed dielectrics with a uniform thickness from 70 nm to 200 nm by taking advantage of the coffee ring effect. A high capacitance per unit area of 230 pF/mm2 is achieved from capacitors with linear morphologies fully printed onto flexible substrates. We also demonstrate organic TFTs with an average mobility of 0.86 cm~2/Vs and a source drain current of 57 μA obtained with a supply voltage of 15 V. This performance was shown to be consistent, with a standard deviation of 15% obtained from hundreds of printed organic TFTs on PET substrates. This consistency was further validated by the production of functional NAND, NOR, AND and OR logic gates. Our results demonstrate that the coffee ring effect, which is usually viewed as undesirable, can enable higher performance in printed electronic devices.
机译：高性能印刷电容器和薄膜晶体管（TFT）需要沉积薄而均匀的介电层，但是用印刷方法很难做到这一点。我们已经证明了利用咖啡环效应具有70 nm至200 nm均匀厚度的喷墨打印电介质。通过将具有线性形态的电容器完全印刷在柔性基板上，可以实现每单位面积230 pF / mm2的高电容。我们还演示了在15 V电源电压下获得的平均迁移率为0.86 cm〜2 / Vs且源漏电流为57μA的有机TFT。该性能被证明是一致的，其标准偏差为15％。在PET基板上印刷了数百种有机TFT。通过生产功能性NAND，NOR，AND和OR逻辑门进一步验证了这种一致性。我们的结果表明，通常被视为不受欢迎的咖啡环效应可以在印刷电子设备中实现更高的性能。

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  • 来源
    《Organic Electronics》 |2016年第2期|114-119|共6页
  • 作者

    Neil Graddage; Ta-Ya Chu; Heping Ding; Christophe Py; Afshin Dadvand; Ye Tao;

  • 作者单位

    Information and Communications Technologies Portfolio, National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;

    Information and Communications Technologies Portfolio, National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;

    Information and Communications Technologies Portfolio, National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;

    Information and Communications Technologies Portfolio, National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;

    Information and Communications Technologies Portfolio, National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;

    Information and Communications Technologies Portfolio, National Research Council of Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada;

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  • 正文语种 eng
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  • 关键词

    Printed electronics; Inkjet; Polymer dielectric; Capacitor; TFT;

    机译：印刷电子产品;喷墨高分子电介质;电容器薄膜晶体管;

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