title: Logic circuits composed of flexible carbon nanotube thin-film transistor and ultra-thin polymer gate dielectric.
abstract: Printing electronics has become increasingly prominent in the field of electronic engineering because this method is highly efficient at producing flexible, low-cost and large-scale thin-film transistors. However, TFTs are typically constructed with rigid insulating layers consisting of oxides and nitrides that are brittle and require high processing temperatures, which can cause a number of problems when used in printed flexible TFTs. In this study, we address these issues and demonstrate a method of producing inkjet-printed TFTs that include an ultra-thin polymeric dielectric layer produced by initiated chemical vapor deposition (iCVD) at room temperature and highly purified 99.9% semiconducting carbon nanotubes. Our integrated approach enables the production of flexible logic circuits consisting of CNT-TFTs on a polyethersulfone (PES) substrate that have a high mobility (up to 9.76 cm(2) V(-1) sec(-)1), a low operating voltage (less than 4 V), a high current on/off ratio (3 × 10(4)), and a total device yield of 90%. Thus, it should be emphasized that this study delineates a guideline for the feasibility of producing flexible CNT-TFT logic circuits with high performance based on a low-cost and simple fabrication process.
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology, (KAIST) 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea.
authors.forename: Dongil
authors.initials: D
authors.lastname: Lee
authors.affiliation: School of Electrical Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul, 02707, Republic of Korea.
authors.forename: Jinsu
authors.initials: J
authors.lastname: Yoon
authors.affiliation: School of Electrical Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul, 02707, Republic of Korea.
authors.forename: Juhee
authors.initials: J
authors.lastname: Lee
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology, (KAIST) 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea.
authors.forename: Byung-Hyun
authors.initials: BH
authors.lastname: Lee
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology, (KAIST) 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea.
authors.forename: Myeong-Lok
authors.initials: ML
authors.lastname: Seol
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology, (KAIST) 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea.
authors.forename: Hagyoul
authors.initials: H
authors.lastname: Bae
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology, (KAIST) 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea.
authors.forename: Seung-Bae
authors.initials: SB
authors.lastname: Jeon
authors.affiliation: Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, South Korea.|Graphene Research Center, KI for Nanocentury, KAIST, Daejeon, 34141, South Korea.
authors.forename: Hyejeong
authors.initials: H
authors.lastname: Seong
authors.affiliation: Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, South Korea.|Graphene Research Center, KI for Nanocentury, KAIST, Daejeon, 34141, South Korea.
authors.forename: Sung Gap
authors.initials: SG
authors.lastname: Im
authors.affiliation: School of Electrical Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul, 02707, Republic of Korea.
authors.forename: Sung-Jin
authors.initials: SJ
authors.lastname: Choi
authors.affiliation: School of Electrical Engineering, Korea Advanced Institute of Science and Technology, (KAIST) 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, South Korea.
authors.forename: Yang-Kyu
authors.initials: YK
authors.lastname: Choi