Three-dimensional characterization of OTFT on modified hydrophobic flexible polymeric substrate by low energy Cs+ ion sputtering

摘要: Abstract Here, electron-transporting semiconducting organic channels made of N,N′-1H, 1H-perfluorobutyl dicyanoperylenecarboxydiimmide (PDIF-CN2) molecules were thermally evaporated on flexible polyethylene-naphtalate (PEN) plastic substrates equipped with gold (Au) electrodes. This multilayer structure represents the basic component for fabrication staggered top-gate n-type thin-film transistors (OTFTs) to be completed addition a polymeric dielectric layer and an aluminum gate electrode. PEN substrate was treated hexamethyldisilazane (HMDS) in order make it more hydrophobic. Indeed, hydrophobized surface shown induce ordered supramolecular semiconductor during evaporation process. The hybrid organic/inorganic formally trilayer non-passivated OTFT successfully profiled single run through ToF-SIMS depth profiling experiments low energy cesium ions. High mass molecular fragment ions obtained used as indicators interfaces, leading increase information specificity. HMDS modification clearly detected spatially located. Finally, chemometric approach also adopted evaluate data. In particular, principal analysis (PCA) K-means algorithm tested innovative method identification fragments useful multi-layer characterization determination number layers, respectively.