Uniform and Stable Aerosol Jet Printing of Carbon Nanotube Thin-Film Transistors by Ink Temperature Control.
Uniform and Stable Aerosol Jet Printing of Carbon Nanotube Thin-Film Transistors by Ink Temperature Control.
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DOI：
10.1021/acsami.0c12046
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发表时间：
2020-09-23
影响因子：
9.5
通讯作者：
Franklin AD
中科院分区：
文献类型：
--
作者：
Lu S;Zheng J;Cardenas JA;Williams NX;Lin YC;Franklin AD
半导体碳纳米管(CNT)网络具有吸引薄膜应用的电、机械和化学特性，而印刷允许可扩展的、经济上有利的CNT薄膜晶体管(TFT)的制造。然而，打印的CNT-TFT的器件之间的差异仍然是一个令人担忧的问题，这在很大程度上是由于打印的CNT薄膜的形貌和由此产生的性质的变化。在这项工作中，我们克服了与打印均匀性相关的挑战，并展示了一种气溶胶喷墨打印工艺，该工艺可生产出空穴迁移率为μh=12.5cm2/V·S的器件，相对标准偏差低至4%(来自38多个器件)。实现如此高一致性的因素包括印刷过程中对碳纳米管墨浴温度的控制、使用非挥发性和增粘剂的油墨配方以及用于去除聚合物的热处理。研究发现，在短期(~1分钟)和长期(~1小时)打印设置下，较低的碳纳米管油墨温度有利于气溶胶喷墨打印的均匀性和稳定性。这些发现揭示了通常被忽视的碳纳米管喷雾打印的影响，并为实现大规模、高一致性的碳纳米管-TFT提供了一种实用的策略。
Semiconducting carbon nanotube (CNT) networks exhibit electrical, mechanical, and chemical properties attractive for thin-film applications, and printing allows for scalable, economically favorable fabrication of CNT thin-film transistors (TFTs). However, device-to-device variation of printed CNT-TFTs remains a concern, which largely stems from variations in printed CNT thin-film morphology and resulting properties. In this work, we overcome the challenges associated with printing uniformity and demonstrate an aerosol jet printing process that yields devices exhibiting a hole mobility of μh = 12.5 cm2/V · s with a relative standard deviation as small as 4% (from over 38 devices). The enabling factors of such high uniformity include control of the CNT ink bath temperature during printing, ink formulation with nonvolatile and viscosifying additives, and a thermal treatment for polymer removal. It is discovered that a low CNT ink temperature benefits aerosol jet printing uniformity and stability in both short-term (~1 min) and long-term (~1 hour) printing settings. These findings shed light on the effect of a commonly overlooked dimension of CNT aerosol jet printing and provide a practical strategy to large-scale, high-consistency realization of CNT-TFTs.
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影响因子：
19
作者：
Cai, Le;Zhang, Suoming;Wang, Chuan
通讯作者：
Wang, Chuan
影响因子：
9.5
作者：
Goh, Guo Liang;Agarwala, Shweta;Yeong, Wai Yee
通讯作者：
Yeong, Wai Yee
影响因子：
9.5
作者：
Joo, Yongho;Brady, Gerald J.;Gopalan, Padma
通讯作者：
Gopalan, Padma
用于场效应晶体管和生物传感器的高质量、高浓度半导体单壁碳纳米管
影响因子：
17.1
作者：
Li, Wen-Shan;Hou, Peng-Xiang;Cheng, Hui-Ming
通讯作者：
Cheng, Hui-Ming
影响因子：
4
作者：
Chandra, Bhupesh;Park, Hongsik;Tulevski, George S.
通讯作者：
Tulevski, George S.