title: Design of a polymer-carbon nanohybrid junction by interface modeling for efficient printed transistors.
abstract: Molecularly hybridized materials composed of polymer semiconductors (PSCs) and single-walled carbon nanotubes (SWNTs) may provide a new way to exploit an advantageous combination of semiconductors, which yields electrical properties that are not available in a single-component system. We demonstrate for the first time high-performance inkjet-printed hybrid thin film transistors with an electrically engineered heterostructure by using specially designed PSCs and semiconducting SWNTs (sc-SWNTs) whose system achieved a high mobility of 0.23 cm(2) V(-1) s(-1), no V(on) shift, and a low off-current. PSCs were designed by calculation of the density of states of the backbone structure, which was related to charge transfer. The sc-SWNTs were prepared by a single cascade of the density-induced separation method. We also revealed that the binding energy between PSCs and sc-SWNTs was strongly affected by the side-chain length of PSCs, leading to the formation of a homogeneous nanohybrid film. The understanding of electrostatic interactions in the heterostructure and experimental results suggests criteria for the design of nanohybrid heterostructures.
authors.affiliation: Display Device Laboratory, Samsung Advanced Institute of Technology, Samsung Electronics, Yongin, Gyeonggi-do 446-712, Korea.
authors.forename: Do Hwan
authors.initials: DH
authors.lastname: Kim
authors.forename: Hyeon-Jin
authors.initials: HJ
authors.lastname: Shin
authors.forename: Hyo Sug
authors.initials: HS
authors.lastname: Lee
authors.forename: Jiyoul
authors.initials: J
authors.lastname: Lee
authors.forename: Bang-Lin
authors.initials: BL
authors.lastname: Lee
authors.forename: Wi Hyoung
authors.initials: WH
authors.lastname: Lee
authors.forename: Jong-Hwa
authors.initials: JH
authors.lastname: Lee
authors.forename: Kilwon
authors.initials: K
authors.lastname: Cho
authors.forename: Woo-Jae
authors.initials: WJ
authors.lastname: Kim
authors.forename: Sang Yoon
authors.initials: SY
authors.lastname: Lee
authors.forename: Jae-Young
authors.initials: JY
authors.lastname: Choi
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Kim
mesh_terms: D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D014173:Transistors, Electronic
chemical_list: D037742:Nanotubes, Carbon; D011108:Polymers