Electroluminescent device comprising in this order(a) an anode(b) a hole transporting layer(c) a light-emitting layer(d) optionally an electron transporting layer and(e) a cathodeand a light-emitting substance, wherein the light-emitting substance is a diketopyrrolopyrrole represented by formula I or formula IIIwherein R1and R2, independently from each other, stand for C1-C25-alkyl, allyl which can be substituted one to three times with C1-C3alkyl or Ar3, or -CR3R4-(CH2)m-Ar3, wherein R3and R4independently from each other stand for hydrogen or C1-C4alkyl, or phenyl which can be substituted one to three times with C1-C3alkyl,Ar3stands for phenyl or 1- or 2-naphthyl which can be substituted one to three times with C1-C8alkyl, C1-C8alkoxy, halogen or phenyl, which can be substituted with C1-C8alkyl or C1-C8alkoxy one to three times, and m stands for 0, 1, 2, 3 or 4,Ar1and Ar2, independently from each other, stand for aryl radicals, preferably forororwherein, R5, R6and R7, independently from each other, stand for hydrogen, cyano, halogen, C1-C6alkyl, -NR8R9, -OR10, -S(O)nR8, -Se(O)nR8, or phenyl, which can be substituted one to three times with C1-C8alkyl or C1-C8alkoxy,wherein R8and R9, independently from each other, stand for hydrogen, phenyl, C1-C25-alkyl, C5-C12-cycloalkyl, -CR3R4-(CH2)m-Ph, R10, wherein R10stands for C6-C24-aryl, or a saturated or unsaturated heterocyclic radical comprising five to seven ring atoms, wherein the ring consists of carbon atoms and one to three hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, wherein Ph, the aryl and heterocyclic radical can be substituted one to three times with C1-C8alkyl, C1-C8alkoxy, or halogen, or R8and R9stand for -C(O)R10, wherein R11can be C1-C25-alkyl, C5-C12-cycloalkyl, R10, -OR12or -NR13R14, wherein R12, R13, and R14stand for C1-C25-alkyl, C5-C12-cycloalkyl, C6-C24-aryl, ora saturated or unsaturated heterocyclic radical comprising five to seven ring atoms, wherein the ring consists of carbon atoms and one to three hetero atoms selected from the group consisting of nitrogen, oxygen and sulfur, wherein the aryl and heterocyclic radical can be substituted one to three times with C1-C8alkyl or C1-C8alkoxy, or -NR8R9stands for a five- or sixmembered heterocyclic radical in which R8and R9together stand for tetramethylene, pentamethylene, -CH2-CH2-O-CH2-CH2-, or -CH2-CH2-NR5-CH2-CH2-, preferably -CH2-CH2-O-CH2-CH2-, and n stands for 0, 1, 2 or 3,and wherein Z stands for a diradical selected from the group consisting of a single bond, C2-C6alkylene, which can be substituted one to three times with C1-C4alkyl, C1-C4alkoxy, or phenyl, phenylene or naphthylene, processes for the preparation of compounds I, its uses and compositions comprising the compounds I and/or III.