Capacitively Coupled Hybrid Ion Gel and Carbon Nanotube Thin-Film Transistors for Low Voltage Flexible Logic Circuits

Title
Capacitively Coupled Hybrid Ion Gel and Carbon Nanotube Thin-Film Transistors for Low Voltage Flexible Logic Circuits
Authors
임정아김형준최용석강주훈Ethan B. SecorJia Sun강문성Mark C. Hersam조정호
Keywords
carbon nanotubes; polymer dielectric; ion gel; printing; flexible; logic gate
Issue Date
2018-08
Publisher
Advanced functional materials
Citation
VOL 28, NO 34-1802610-8
Abstract
The lamination of a high-capacitance ion gel dielectric layer onto semiconducting carbon nanotube (CNT) thin-film transistors (TFTs) that are bottom-gated with a low-capacitance polymer dielectric layer drastically reduces the operating voltage of the devices resulting from the capacitive coupling effect between the two dielectric layers sandwiching the CNT channel. As the CNT channel has a network structure, only a compact area of ion gel is required to make the capacitive coupling effect viable, unlike the planar channels of previously reported transistors that required a substantially larger area of ion gel dielectric layer to induce the coupling effect. The capacitively coupled CNT TFTs possess superlative electrical characteristics such as high carrier mobilities (42.0 cm2 (Vs)&#8722; 1 for holes and 59.1 cm2 (Vs)&#8722; 1 for electrons), steep subthreshold swings (160 mV dec&#8722; 1 for holes and 100 mV dec&#8722; 1 for electrons), and low gate leakage currents (<1 nA). These devices can be further integrated to form complex logic circuits on flexible substrates with high mechanical resilience. The layered geometry of the device coupled with scalable solution-based fabrication has significant potential for large-scale flexible electronics.
URI
http://pubs.kist.re.kr/handle/201004/68053
ISSN
1616-301X
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KIST Publication > Article
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