Extremely Bendable, High-Performance Integrated Circuits Using Semiconducting Carbon Nanotube Networks for Digital, Analog, and Radio-Frequency Applications

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• 作者：Chuan Wang ; Jun-Chau Chien ; Kuniharu Takei ; Toshitake Takahashi ; Junghyo Nah ; Ali M. Niknejad ; Ali Javey
• 刊名：Nano Letters
• 出版年：2012
• 出版时间：March 14, 2012
• 年：2012
• 卷：12
• 期：3
• 页码：1527-1533
• 全文大小：415K
• 年卷期：v.12,no.3(March 14, 2012)
• ISSN：1530-6992

文摘

Solution-processed thin-films of semiconducting carbon nanotubes as the channel material for flexible electronics simultaneously offers high performance, low cost, and ambient stability, which significantly outruns the organic semiconductor materials. In this work, we report the use of semiconductor-enriched carbon nanotubes for high-performance integrated circuits on mechanically flexible substrates for digital, analog and radio frequency applications. The as-obtained thin-film transistors (TFTs) exhibit highly uniform device performance with on-current and transconductance up to 15 渭A/渭m and 4 渭S/渭m. By performing capacitance鈥搗oltage measurements, the gate capacitance of the nanotube TFT is precisely extracted and the corresponding peak effective device mobility is evaluated to be around 50 cm²V^鈥?s^鈥?. Using such devices, digital logic gates including inverters, NAND, and NOR gates with superior bending stability have been demonstrated. Moreover, radio frequency measurements show that cutoff frequency of 170 MHz can be achieved in devices with a relatively long channel length of 4 渭m, which is sufficient for certain wireless communication applications. This proof-of-concept demonstration indicates that our platform can serve as a foundation for scalable, low-cost, high-performance flexible electronics.

Keywords:

Flexible electronics; thin-film transistors; semiconducting nanotube networks; integrated circuits; radio frequency applications