title: Spray-coated carbon nanotube thin-film transistors with striped transport channels.
abstract: We present results for the transfer characteristics of carbon nanotube thin-film transistors (CNT-TFTs) that utilize single-walled carbon nanotube thin-films prepared by direct spray-coating on the substrate. By varying the number of spray-coatings (N(sp)) and the concentration of nanotubes in solution (C(NT)), it was possible to control the conductivity of the spray-coated nanotube thin-film from 129 to 0.1 kΩ/□. Also, by introducing stripes into the channel of the CNT-TFT, and thereby reducing the number of metallic percolation paths between source and drain, it was possible to enhance the on/off current ratio 1000-fold, from 10 to 10(4), demonstrating that it may be possible to utilize spray-coating as a method to fabricate CNT-TFTs for large area switching array applications.
authors.affiliation: Department of Electronic Engineering, College of Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 133-791, Korea.
authors.forename: Minho
authors.initials: M
authors.lastname: Jeong
authors.forename: Kunhak
authors.initials: K
authors.lastname: Lee
authors.forename: Eunsuk
authors.initials: E
authors.lastname: Choi
authors.forename: Ahsung
authors.initials: A
authors.lastname: Kim
authors.forename: Seung-Beck
authors.initials: SB
authors.lastname: Lee