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Printed Transistors on Paper: Towards Smart Consumer Product Packaging

机译：纸上印刷晶体管：迈向智能消费产品包装

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摘要

The integration of fully printed transistors on low cost paper substrates compatible with roll-to-roll processes is demonstrated here. Printed electronics promises to enable a range of technologies on paper including printed sensors, RF tags, and displays. However, progress has been slow due to the paper roughness and ink absorption. This is solved here by employing gravure printing to print local smoothing pads that also act as an absorption barrier. This innovative local smoothing process retains desirable paper properties such as foldability, breathability, and biodegradability outside of electronically active areas. Atomic force microscopy measurements show significant improvements in roughness. The polymer ink and printing parameters are optimized to minimize ink absorption and printing artifacts when printing the smoothing layer. Organic thin film transistors (OTFT) are fabricated on top of this locally smoothed paper. OTFTs exhibit performance on par with previously reported printed transistors on plastic utilizing the same materials system (pBTTT semiconductor, poly-4-vinylphenol dielectric). OTFTs deliver saturation mobility approaching 0.1 cm~2 V~(-1) s~(-1) and on-off-ratio of 3.2 × 10~4. This attests to the quality of the local smoothing, and points to a promising path for realizing electronics on paper.
机译：此处展示了在与卷对卷工艺兼容的低成本纸质基材上集成全印刷晶体管的方法。印刷电子产品有望在纸上实现一系列技术，包括印刷传感器，RF标签和显示器。但是，由于纸张粗糙和油墨吸收，进展缓慢。在这里，这可以通过使用凹版印刷来印刷还用作吸收阻挡层的局部平滑垫来解决。这种创新的局部平滑过程在电子有效区域之外保留了理想的纸张属性，例如可折叠性，透气性和生物降解性。原子力显微镜测量显示出粗糙度的显着改善。优化聚合物油墨和印刷参数，以在印刷平滑层时最大程度地减少油墨吸收和印刷伪影。有机薄膜晶体管（OTFT）在这种局部平滑的纸上制造。 OTFT与使用相同材料系统（pBTTT半导体，聚-4-乙烯基苯酚电介质）的塑料印刷晶体管相比，具有同等的性能。 OTFT的饱和迁移率接近0.1 cm〜2 V〜（-1）s〜（-1），开/关比为3.2×10〜4。这证明了局部平滑的质量，并指出了在纸上实现电子产品的有前途的途径。

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  • 来源
    《Advanced Functional Materials》 |2014年第32期|5067-5074|共8页
  • 作者

    Gerd Grau; Rungrot Kitsomboonloha; Sarah L. Swisher; Hongki Kang; Vivek Subramanian;

  • 作者单位

    Department of Electrical Engineering and Computer Sciences University of California, Berkeley Berkeley, CA 94720-1770, USA;

    Department of Electrical Engineering and Computer Sciences University of California, Berkeley Berkeley, CA 94720-1770, USA;

    Department of Electrical Engineering and Computer Sciences University of California, Berkeley Berkeley, CA 94720-1770, USA;

    Department of Electrical Engineering and Computer Sciences University of California, Berkeley Berkeley, CA 94720-1770, USA;

    Department of Electrical Engineering and Computer Sciences University of California, Berkeley Berkeley, CA 94720-1770, USA;

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