Electrostatic Fermi level tuning in large-scale self-assembled monolayers of oligo(phenylene–ethynylene) derivatives
Xintai Wang, Ali Ismael, Shanglong Ning, Hanan Althobaiti, Alaa A. Al‐Jobory, Ján Girovský, Hippolyte P. A. G. Astier, Luke J. O’Driscoll, Martin R. Bryce, Colin J. Lambert, C. J. B. Ford
Abstract
gate voltage for molecules with different anchoring groups. Molecules with the same backbone, but a different molecule-electrode interface, were shown experimentally to have conductances that differ by a factor of 5 near zero bias. Theoretical calculations using density functional theory support the trends observed in the experimental data. This work sheds light on how to control electron transport within the HOMO-LUMO energy gap in molecular junctions and will be applicable in scaling up molecular electronic systems for future device applications.
Topics & Concepts
MonolayerHOMO/LUMOMolecular orbitalMolecular electronicsChemical physicsMoleculeElectrodeChemistryConductanceDensity functional theorySelf-assembled monolayerPhenyleneGrapheneNanotechnologyMaterials scienceComputational chemistryPhysicsCondensed matter physicsPhysical chemistryPolymerOrganic chemistryMolecular Junctions and NanostructuresOrganic Electronics and PhotovoltaicsQuantum Dots Synthesis And Properties