Top-gate bottom-contact field-effect transistors based on solution-processed films of molecules in which two naphthalene-1,8:4,5- bis(dicarboxdiimide)s are bridged by thieno[3,2-b]thiophene, dithieno[3,2-b:2′,3′-d]thiophene and dithieno[3,2-b:2′, 3′-d]pyrrole exhibit electron mobility values of up to 1.5 cm2 V-1 s-1. © 2011 American Chemical Society.