title: Synthesis of 2,5,8,11,14,17-hexafluoro-hexa-peri- hexabenzocoronene for n-type organic field-effect transistors.
abstract: A fluorine-substituted hexa-peri-hexabenzocoronene was synthesized as a thermostable active material for n-type semiconductors. The LUMO and HOMO energy levels, estimated by UV-vis and photoelectron spectroscopy, were lower by 0.5 eV than those of hexa-peri-hexabenzocoronene. A field-effect transistor fabricated by vacuum sublimation showed n-type performance with a field-effect mobility of 1.6 x 10(-2) cm(2)/Vs and an on/off ratio of 10(4). The electron-withdrawing effect of the fluorine substituents changed the polarity from p-type to n-type.
authors.affiliation: Toyota Central Research and Laboratories Inc., Nagakute, Aichi, Japan. e1319@mosk.tytlabs.co.jp
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kikuzawa
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Mori
authors.forename: Hisato
authors.initials: H
authors.lastname: Takeuchi