Fully Printed Foldable Integrated Logic Gates with Tunable Performance Using Semiconducting Carbon Nanotubes
Fully Printed Foldable Integrated Logic Gates with Tunable Performance Using Semiconducting Carbon Nanotubes
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DOI：
10.1002/adfm.201502367
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发表时间：
2015-09-16
影响因子：
19
通讯作者：
Wang, Chuan
中科院分区：
文献类型：
--
作者：
Cai, Le;Zhang, Suoming;Wang, Chuan
大面积、低成本柔性微电子器件的实现依赖于材料科学的进步和制造技术的创新。在这项研究中，通过类似喷墨的印刷工艺在一块超薄聚酰亚胺基板上制造了极其可弯曲和可折叠的碳纳米管薄膜晶体管和集成逻辑门。采用由钛酸钡纳米粒子和聚甲基丙烯酸甲酯组成的混合栅极介电层不仅具有优异的栅极效应，而且具有优异的机械柔量。经过多达 1000 次曲率半径低至 1 毫米的弯曲测试以及非常激进的折叠测试后，该器件特性的变化量可以忽略不计。此外，每个集成逻辑门的电气特性可以通过针对不同器件使用不同数量的碳纳米管印刷通道来单独调整和优化，体现了喷墨印刷作为数字、增材和无掩模方法的独特适应性。这份关于完全印刷和可折叠集成逻辑门的报告代表了碳纳米管在高性能和低成本无处不在的柔性电子产品的实际应用方面取得的鼓舞人心的进步。
The realization of large-area and low-cost flexible macroelectronics relies on both the advancements in materials science and the innovations in manufacturing techniques. In this study, extremely bendable and foldable carbon nanotube thin film transistors and integrated logic gates are fabricated on a piece of ultrathin polyimide substrate through an ink-jet-like printing process. The adoption of a hybrid gate dielectric layer consisting of barium titanate nanoparticles and poly(methyl methacrylate) has led to not only excellent gating effect but also superior mechanical compliance. The device characteristics show negligible amount of change after up to 1000 cycles of bending tests with curvature radii down to 1 mm, as well as very aggressive folding tests. Additionally, the electrical characteristics of each integrated logic gate can be tuned and optimized individually by using different numbers of carbon nanotube printing passes for different devices, manifesting the unique adaptability of ink-jet printing as a digital, additive, and maskless method. This report on fully printed and foldable integrated logic gates represents an inspiring advancement toward the practical applications of carbon nanotubes for high-performance and low-cost ubiquitous flexible electronics.