Self-assembled monolayer field-effect transistors based on oligo-9,9′-dioctylfluorene phosphonic acidsElectronic supplementary information (ESI) available: Experimental details, methods and detailed results of UV-Vis absorption, XRR, TGA, SCA. See DOI: 10.1039/c7nr06090d

The use of functional oligomers of π-conjugated oligofluorenes led to a region-selective assembly of amorphous monolayers which exhibit robust lateral charge transport pathways in self-assembled monolayer field-effect transistors over long distances and even in mixed monolayers of semiconducting and insulating molecules. This oligomer concept might stimulate a new molecular design of self-assembling semiconducting materials. A fluorene oligomer is employed in a new type of multiple π-system self-assembled monolayer to optimize charge transport.