Carbazolocarbazol-bis(dicarboximides) and their use as semiconductors

A compound of formula I

• wherein
• R1, R2, R3, and R4 are each independently selected from the group consisting of hydrogen and an unsubstituted or a substituted alkyl, cycloalkyl, heterocycloalkyl, aryl and hetaryl group,
• R5, R6, R7, R8, R9, R10, R11 and R12 are each independently selected from the group consisting of
• hydrogen,
• an unsubstituted or a substituted alkyl, alkoxy, alkylthio, (monoalkyl)amino, (dialkyl)amino, cycloalkyl, cycloalkoxy, cycloalkylthio, (monocycloalkyl)amino, (dicycloalkyl)amino, heterocycloalkyl, heterocycloalkoxy, heterocycloalkylthio, (monoheterocycloalkyl)amino, (diheterocycloalkyl)amino, aryl, aryloxy, arylthio, (monoaryl)amino, (diaryl)amino, hetaryl, hetaryloxy, hetarylthio, (monohetaryl)amino, (dihetaryl)amino group,
• a halogen atom, a hydroxy group, a mercapto group, a cyano group, a nitro group, a cyanato group, a thiocyanato group, a formyl group, an acyl group, a carboxy group, a carboxylate group, an alkylcarbonyloxy group, a carbamoyl group, an alkylaminocarbonyl group, a dialkylaminocarbonyl group, a sulfo group, a sulfonate group, a sulfoamino group, a sulfamoyl group, an alkylsulfonyl group, an arylsulfonyl group, an amidino group, and a NE1E2 group, where E1 and E2 are each independently hydrogen, an alkyl group, a cycloalkyl group, a heterocycloalkyl group, an aryl group or a hetaryl group, and
• in each case at least two adjacent radicals from R5, R6, R7, R8, R9, R10, R11 and R12, together with the carbon atoms of the benzene ring to which R5, R6, R7, R8, R9, R10, R11 and R12 are bonded, optionally form a fused ring system comprising 1, 2, 3, 4, 5, 6, 7 or 8 further rings.