Lee Yongwoo, Jung Haesun, Choi Bongsik, Yoon Jinsu, Yoo Han Bin, Kim Hyo-Jin, Park Geon-Hwi, Kim Dong Myong, Kim Dae Hwan, Kang Min-Ho, Choi Sung-Jin
School of Electrical Engineering, Kookmin University Seoul 02707 Korea
Department of Nano-process, National Nanofab Center Daejeon 34141 Korea
RSC Adv. 2019 Jul 16;9(38):22124-22128. doi: 10.1039/c9ra02855b. eCollection 2019 Jul 11.
Carbon nanotubes (CNTs), a low-dimensional material currently popular in industry and academia, are promising candidates for addressing the limits of existing semiconductors. In particular, CNTs are attractive candidates for flexible electronic materials due to their excellent flexibility and potential applications. In this work, we demonstrate a flexible CNT Schottky diode based on highly purified, preseparated, solution-processed 99% semiconducting CNTs and an integrated circuit application using the CNT Schottky diodes. Notably, the fabricated flexible CNT diode can greatly modulate the properties of the contact formed between the semiconducting CNT and the anode electrode the control gate bias, exhibiting a high rectification ratio of up to 2.5 × 10. In addition, we confirm that the electrical performance of the CNT Schottky diodes does not significantly change after a few thousand bending/releasing cycles of the flexible substrate. Finally, integrated circuit (IC) applications of logic circuits (OR and AND gates) and an analog circuit (a half-wave rectifier) were presented through the use of flexible CNT Schottky diode combinations. The correct output responses are successfully achieved from the circuit applications; hence, we expect that our findings will provide a promising basis for electronic circuit applications based on CNTs.
碳纳米管（CNTs）是目前在工业和学术界都很流行的一种低维材料，有望解决现有半导体的局限性。特别是，由于其优异的柔韧性和潜在应用，碳纳米管是柔性电子材料的有吸引力的候选者。在这项工作中，我们展示了一种基于高度纯化、预分离、溶液处理的99%半导体碳纳米管的柔性碳纳米管肖特基二极管，以及使用该碳纳米管肖特基二极管的集成电路应用。值得注意的是，所制备的柔性碳纳米管二极管可以通过控制栅极偏置极大地调制半导体碳纳米管与阳极电极之间形成的接触特性，呈现出高达2.5×10的高整流比。此外，我们证实，在柔性衬底进行数千次弯曲/释放循环后，碳纳米管肖特基二极管的电学性能没有显著变化。最后，通过使用柔性碳纳米管肖特基二极管组合，展示了逻辑电路（或门和与门）和模拟电路（半波整流器）的集成电路（IC）应用。从电路应用中成功获得了正确的输出响应；因此，我们期望我们的发现将为基于碳纳米管的电子电路应用提供一个有前景的基础。
