Compounds with diazadibenzofurane or diazadibenzothiophene structures

A compound of formula (A):

• wherein
• Y1 is O or S;
• Y2 is N(Ar), O, C(R1)2, or —R1C═CR1—;
• W is the same or different in each instance and is N or CR1, with the proviso that not more than two W in one cycle are N, wherein the R1 radicals in the W groups do not form a fused heteroaromatic ring system;
• L1 is a bond or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms and which is optionally substituted by one or more R1 radicals;
• A is the same or different in each instance and is N, CAra, or CArb, wherein exactly two A are N separated by at least one CAra or CArb group, with the proviso that A is CArb if two N are adjacent to this A;
• Ar is the same or different in each instance and is an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms and which is optionally substituted by one or more radicals R1;
• Ara is the same or different in each instance and is an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms and which is optionally substituted by one or more radicals R′;
• Arb is a group of formula (Arb-1):
• wherein
• L2 is a bond or an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms and which is optionally substituted by one or more R1 radicals;
• m is 0, 1, 2, 3, or 4;
• and
• the dotted line denotes the bond,
• R1 is the same or different in each instance and is H, D, F, Cl, Br, I, CN, NO2, N(Ar1)2, N(R2)2, C(═O)Ar1, C(═O)R2, P(═O)(Ar1)2, P(Ar1)2, B(Ar1)2, Si(Ar1)3, Si(R2)3, a straight-chain alkyl, alkoxy, or thioalkoxy group having 1 to 40 carbon atoms or a branched or cyclic alkyl, alkoxy, or thioalkoxy group having 3 to 40 carbon atoms, each of which is optionally substituted by one or more R2 radicals, wherein one or more nonadjacent CH2 groups are optionally replaced by
• —R2C═CR2—, Si(R2)2, C═O, C═S, C═NR2, —C(═O)O—, —C(═O)NR2—, NR2, P(═O)(R2), —O—, —S—, SO, or SO2, and wherein one or more hydrogen atoms are optionally replaced by D, F, Cl, Br, I, CN, or NO2, or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms, each of which is optionally substituted by one or more R2 radicals, or an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms and which is optionally substituted by one or more R2 radicals, or an aralkyl or heteroaralkyl group having 5 to 40 aromatic ring atoms and which is optionally substituted by one or more R2 radicals, or a combination of these systems;
• and wherein two or more R1 together optionally define a mono- or polycyclic, aliphatic, or aromatic ring system;
• Ar1 is the same or different in each instance and is an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms and which is optionally substituted by one or more nonaromatic R2 radicals;
• and wherein two Ar1 bonded to the same silicon atom, nitrogen atom, phosphorus atom, or baron atom are optionally also joined together via a single bond or a bridge selected from the group consisting of B(R2), C(R2)2, Si(R2)2, C═O, C═NR2, C═C(R2)2, O, S, S═O, SO2, N(R2), P(R2), and P(═O)R2;
• R2 is the same or different in each instance and is H, D, F, Cl, Br, I, CN, B(OR3)2, —CHO, C(═O)R3, CR3═C(R3)2, C(═O)OR3, C(═O)N(R3)2, Si(R3)3, P(R3)2, B(R13)2, N(R3)2, NO2, P(═O)(R3)2, OSO2R3, OR3, S(═O)R3, S(═O)2R3, a straight-chain alkyl, alkoxy, or thioalkoxy group having 1 to 40 carbon atoms or a branched or cyclic alkyl, alkoxy, or thioalkoxy group having 3 to 40 carbon atoms, each of which is optionally substituted by one or more R3 radicals, wherein one or more nonadjacent CH2 groups are optionally replaced by —R3C═CR3—, Si(R3)2, C═O, C═S, C═NR3, —C(═O)O—, —C(═O)NR3—, NR3, P(═O)(R3), —O—, —S—, SO, or SO2 and wherein one or more hydrogen atoms are optionally replaced by D, F, Cl, Br, I, CN, or NO2, or an aromatic or heteroaromatic ring system having 5 to 40 aromatic ring atoms and which is optionally substituted in each case by one or more R3 radicals, or an aryloxy or heteroaryloxy group having 5 to 40 aromatic ring atoms and which is optionally substituted by one or more R3 radicals, or a combination of these systems;
• and wherein two or more adjacent R2 together optionally define a mono- or polycyclic, aliphatic, or aromatic ring system;
• R3 is the same or different in each instance and is H, D, F, or an aliphatic, aromatic, and/or heteroaromatic hydrocarbyl radical having 1 to 20 carbon atoms, wherein hydrogen atoms are also optionally replaced by F;
• and wherein two or more adjacent R3 together optionally define a mono- or polycyclic, aliphatic, or aromatic ring system;
• n is 0, 1, 2, or 3;
• with the proviso that,
• if Y2 is N(Ar) or O, Ara does not comprise any carbazole group, including any R1, R2, and R3 substituents bonded to Ara.