Dimensional scaling of high-speed printed organic transistors enabling high-frequency operation
Dimensional scaling of high-speed printed organic transistors enabling high-frequency operation
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DOI：
10.1088/2058-8585/ab739a
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发表时间：
2020-02-01
影响因子：
3.1
通讯作者：
Subramanian, Vivek
中科院分区：
文献类型：
--
作者：
Grau, Gerd;Subramanian, Vivek
一段时间以来，印刷电子产品承诺为大众市场应用提供低成本、大面积和灵活的电子产品;然而，到目前为止，一个限制因素是设备性能。在过去的十年中，在用于印刷晶体管的材料、工艺和印刷分辨率方面取得了很大的进步。在这篇文章中，我们回顾了印刷有机薄膜晶体管的尺寸缩放，这使得高频操作。我们回顾了不同的设备架构，需要不同的尺寸进行扩展，伴随着性能和复杂性的权衡。已经使用各种印刷方法来印刷按比例缩放的晶体管。喷墨和凹版印刷已经看到了最大的改进。我们将在这里重点介绍凹版印刷，因为它不仅可以实现高分辨率功能，还可以实现高速印刷以实现低成本制造。由于印刷栅压膜的厚度难以按比例缩小，工作电压的缩小幅度较小。有机半导体材料的性能也得到了显著改善。在加工半导体时，需要考虑其他器件尺寸的缩放以优化性能。基于这些进步，晶体管开关频率在过去十年中急剧增加，有几份报告称高速印刷逆变器工作在高kHz至低MHz频率，这对印刷电子的新兴应用来说是有希望的结果。
Printed electronics has promised to deliver low-cost, large-area and flexible electronics for mass-market applications for some time; however, so far one limiting factor has been device performance. Over the last decade, great progress has been made in terms of materials, processing and printing resolution for printed transistors. In this article, we review dimensional scaling of printed organic thin-film transistors, which has enabled high-frequency operation. We review different device architectures that require different dimensions to be scaled with accompanying tradeoffs in performance and complexity. Various printing methods have been used to print scaled transistors. Inkjet and gravure printing have seen the greatest improvements. We will focus on gravure printing here as it not only enables high-resolution features but also high-speed printing for low-cost manufacturing. Operating voltage has been scaled down less aggressively due to difficulties with scaling down the thickness of printed gate dielectrics. The performance of organic semiconductor materials has also improved substantially. When processing the semiconductor, the scaling of other device dimensions needs to be considered to optimize performance. Based on these advances, transistor switching frequency has increased dramatically over the last decade with several reports of high-speed printed inverters operating at high kHz to low MHz frequencies, which are promising results for emerging applications of printed electronics.