title: Self-assembly and charge carrier transport of solution-processed conjugated polymer monolayers on dielectric surfaces with controlled sub-nanometer roughness.
abstract: In recent years organic field-effect transistors have received extensive attention, however, it is still a great challenge to fabricate monolayer-based devices of conjugated polymers. In this study, one single layer of poly(2,5-bis(3-alkylthiophen-2-yl)thieno[3,2-b]thiophene) is directly dip-coated, and its self-assembly is precisely tuned from nanofibers to granular aggregates by controlling the dielectric roughness on a sub-nanometer scale. The charge carrier transport of the monolayer transistor exhibits a strong dependence on the dielectric roughness, which is attributed to the roughness-induced effects of higher densities of grain boundaries and charge trapping sites as well as surface scattering. These results mark a great advance in the bottom-up fabrication of organic electronics.
authors.affiliation: Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany. pisula@mpip-mainz.mpg.de muellen@mpip-mainz.mpg.de.
authors.forename: Mengmeng
authors.initials: M
authors.lastname: Li
authors.affiliation: Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany. pisula@mpip-mainz.mpg.de muellen@mpip-mainz.mpg.de.
authors.forename: Felix
authors.initials: F
authors.lastname: Hinkel
authors.affiliation: Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany. pisula@mpip-mainz.mpg.de muellen@mpip-mainz.mpg.de.
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen
authors.affiliation: Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany. pisula@mpip-mainz.mpg.de muellen@mpip-mainz.mpg.de and Department of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Pisula