HOMO stabilisation in pi-Extended Dibenzotetrathiafulvalene derivatives for their application in OFETs
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Three new organic semiconductors, in which either two methoxy units are directly linked to a dibenzotetrathiafulvalene (DB-TTF) central core and a 2,1,3-chalcogendiazole is fused on the one side, or four methoxy groups are linked to the DB-TTF, have been synthesised as active materials for organic field-effect transistors (OFETs). Their electrochemical behaviour, electronic absorption and fluorescence emission as well as photoinduced intramolecular charge transfer were studied. The electron-withdrawing 2,1,3-chalcogendiazole unit significantly affects the electronic properties of these semiconductors, lowering both the HOMO and LUMO energy levels and hence increasing the stability of the semiconducting material. The solution-processed single-crystal transistors exhibit high performance with a hole mobility up to 0.04 cm2¿V-1¿s-1 as well as good ambient stability.
CitationGeng, Y., Pfattner, R., Campos, A., Wang, W., Jeannin, O., Hauser, J., Puigdollers, J., Bromley, S., Decurtins, S., Veciana, J., Rovira, C., Mas, M., Liu, S. HOMO stabilisation in pi-Extended Dibenzotetrathiafulvalene derivatives for their application in OFETs. "Chemistry. A European Journal", 15 Maig 2014, núm. 50, p. 16672-16679.