The use of a composition comprising A) at least one organic semiconductor selected from rylene compounds of the general formula (I.a) wherein n is 1, 2, 3 or 4, R a and R b are independently of one another selected from hydrogen and in each case unsubstituted or substituted alkyl, alkenyl, alkadienyl, alkynyl, cycloalkyl, bicycloalkyl, cycloalkenyl, heterocycloalkyl, aryl and heteroaryl, the R n1, R n2, R n3 and R n4 radicals are independently of one another selected from hydrogen, F, Cl, Br, I, CN, hydroxy, mercapto, nitro, cyanato, thiocyanato, formyl, acyl, carboxy, carboxylate, alkylcarbonyloxy, carbamoyl, alkylaminocarbonyl, dialkylaminocarbonyl, sulfo, sulfonate, sulfoamino, sulfamoyl, alkylsulfonyl, arylsulfonyl, amidino, NE 1 E 2, where E 1 and E 2 are each independently selected from hydrogen, alkyl, cycloalkyl, heterocycloalkyl, aryl or hetaryl, in each case unsubstituted or 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 and (dihetaryl)amino, and B) at least one compound that is liquid at 20°C and 1013 mbar, selected from compounds of the formula R c -X 1 -A-X 2 -R d wherein A is a 5- to 8-membered unsubstituted or substituted, aliphatic or aromatic carbocycle or heterocycle, X 1 and X 2 are ∗-(C=O)-O-, where * is the point of linkage to the aliphatic or aromatic carbocycle or heterocycle; and R c and R d are independently selected from unbranched and branched C 1 -C 12 -alkyl and C 2 -C 12 -alkenyl; for the production of a semiconductor material, preferably a semiconductor material in organic electronics or in organic photovoltaics. A) at least one organic semiconductor selected from rylene compounds of the general formula (I.a) wherein n is 1, 2, 3 or 4, R a and R b are independently of one another selected from hydrogen and in each case unsubstituted or substituted alkyl, alkenyl, alkadienyl, alkynyl, cycloalkyl, bicycloalkyl, cycloalkenyl, heterocycloalkyl, aryl and heteroaryl, the R n1, R n2, R n3 and R n4 radicals are independently of one another selected from hydrogen, F, Cl, Br, I, CN, hydroxy, mercapto, nitro, cyanato, thiocyanato, formyl, acyl, carboxy, carboxylate, alkylcarbonyloxy, carbamoyl, alkylaminocarbonyl, dialkylaminocarbonyl, sulfo, sulfonate, sulfoamino, sulfamoyl, alkylsulfonyl, arylsulfonyl, amidino, NE 1 E 2, where E 1 and E 2 are each independently selected from hydrogen, alkyl, cycloalkyl, heterocycloalkyl, aryl or hetaryl, in each case unsubstituted or 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 and (dihetaryl)amino, and n is 1, 2, 3 or 4, R a and R b are independently of one another selected from hydrogen and in each case unsubstituted or substituted alkyl, alkenyl, alkadienyl, alkynyl, cycloalkyl, bicycloalkyl, cycloalkenyl, heterocycloalkyl, aryl and heteroaryl, the R n1, R n2, R n3 and R n4 radicals are independently of one another selected from hydrogen, F, Cl, Br, I, CN, hydroxy, mercapto, nitro, cyanato, thiocyanato, formyl, acyl, carboxy, carboxylate, alkylcarbonyloxy, carbamoyl, alkylaminocarbonyl, dialkylaminocarbonyl, sulfo, sulfonate, sulfoamino, sulfamoyl, alkylsulfonyl, arylsulfonyl, amidino, NE 1 E 2, where E 1 and E 2 are each independently selected from hydrogen, alkyl, cycloalkyl, heterocycloalkyl, aryl or hetaryl, in each case unsubstituted or 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 and (dihetaryl)amino, and B) at least one compound that is liquid at 20°C and 1013 mbar, selected from compounds of the formula R c -X 1 -A-X 2 -R d wherein A is a 5- to 8-membered unsubstituted or substituted, aliphatic or aromatic carbocycle or heterocycle, X 1 and X 2 are ∗-(C=O)-O-, where * is the point of linkage to the aliphatic or aromatic carbocycle or heterocycle; and R c and R d are independently selected from unbranched and branched C 1 -C 12 -alkyl and C 2 -C 12 -alkenyl; for the production of a semiconductor material, preferably a semiconductor material in organic electronics or in organic photovoltaics. A is a 5- to 8-membered unsubstituted or substituted, aliphatic or aromatic carbocycle or heterocycle, X 1 and X 2 are ∗-(C=O)-O-, where * is the point of linkage to the aliphatic or aromatic carbocycle or heterocycle; and R c and R d are independently selected from unbranched and branched C 1 -C 12 -alkyl and C 2 -C 12 -alkenyl;