title: Influence of substrate surface chemistry on the performance of top-gate organic thin-film transistors.
abstract: Organic thin-film transistor (OTFT) performance depends on the chemical characteristics of the interface between functional semiconductor/dielectric/conductor materials. Here we report for the first time that OTFT response in top-gate architectures strongly depends on the substrate chemical functionalization. Depending on the nature of the substrate surface, dramatic variations and opposite trends of the TFT threshold voltage (~±50 V) and OFF current (10(5)×!) are observed for both p- and n-channel semiconductors. However, the field-effect mobility varies only marginally (~2×). Our results demonstrate that the substrate is not a mere passive mechanical support.
authors.affiliation: CEA/LITEN/LCI, 17 rue des martyrs, 38054 Grenoble, France. dboudinet@polyera.com
authors.forename: Damien
authors.initials: D
authors.lastname: Boudinet
authors.forename: Mohammed
authors.initials: M
authors.lastname: Benwadih
authors.forename: Stéphane
authors.initials: S
authors.lastname: Altazin
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Verilhac
authors.forename: Eric
authors.initials: E
authors.lastname: De Vito
authors.forename: Christophe
authors.initials: C
authors.lastname: Serbutoviez
authors.forename: Gilles
authors.initials: G
authors.lastname: Horowitz
authors.forename: Antonio
authors.initials: A
authors.lastname: Facchetti