Air-stable n-channel organic thin-film transistors with high field-effect mobility based on N,N′-bis(heptafluorobutyl)-3,4:9,10-perylene diimide The thin-film transistor characteristics ofn-channel organic semiconductor,N,N鈥 -bis(2,2,3,3,4,4,4-heptafluorobutyl)-perylene tetracarboxylic ...