Air-stable n-type semiconductor: Core-perfluoroalkylated perylene bisimides

A series of core-perfluoroalkylated perylene bisimides (PBls) have been efficiently synthesized by copper-mediated perfluoroalkylation of dibrominated PBIs. Their aromatic cores are highly twisted due to the steric encumbrance in the bay regions as revealed by single-crystal X-ray analysis. The organic field-effect transistors (OFETs) incorporating these new n-type semiconductors show remarkable air-stability and good field effect mobility.