Dr. Chuan Wang
Department of Electrical Engineering and Computer Sciences, UC Berkeley
BSAC Postdoctoral Researcher
October 30, 2012 | 12:30 to 01:00 | 540 Cory Hall, DOP Center Conference Room
Host: Ali Javey
Single-walled carbon nanotubes possess fascinating electrical properties and offer new entries into a wide range of novel electronic applications that are unattainable with conventional Si-based devices. In this talk, we report our recently developed platform for solution-based processing of high-purity semiconducting carbon nanotube networks that has led to low-cost fabrication of large quantity of thin-film transistors (TFTs) with excellent yield and highly uniform, respectable performance on mechanically flexible substrates. Such transistors exhibit excellent performance with on-current, transconductance, and field-effect mobility up to 15 µA/µm, 4 µS/µm, and 50 cm²/Vs. Based upon the semiconducting carbon nanotube TFTs, a wide range of macro-scale system-level electronics have been demonstrated including flexible integrated circuits (logic gates, ring oscillators, d-flip-flops, and counters), flexible full-color active-matrix organic light-emitting diode display, and a smart interactive skin sensor that can simultaneously map and respond to the pressure stimulus. With emphasis on large-area systems where nm-scale accuracy in the assembly of nanotubes is not required, our demonstrations present a unique niche for nanotube electronics by taking full advantage of their superior electrical and physical properties. Our work shows carbon nanotubes’ immense promise as a low-cost and scalable TFT technology for nonconventional electronic systems with excellent performance.
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