| 主权项 |
1. An organic electroluminescent device comprising, in at least one emitting layer,
(A) at least one phosphorescent compound and (B) at least one compound of the formula (1) or formula (2):where the following applies to the symbols and indices used:
Ar is on each occurrence, identically or differently, a heteroaryl group selected from the group consisting of triazine, pyrazine, pyridazine, pyridine, pyrazole, imidazole, oxazole and thiazole, each of which may be substituted by one or more groups R1; X is on each occurrence, identically or differently, a group of the formula (3), where the dashed bond in each case indicates the bonding to the two benzene rings:or X is on each occurrence, identically or differently, a divalent bridge selected from B(R1), C(R1)2, Si(R1)2, C═C(R1)2, O, S, S═O, SO2, N(R′), P(R1) and P(═O)R1;
R1 is on each occurrence, identically or differently, H, D, F, Cl, Br, I, CHO, N(Ar1)2, C(═O)Ar1, P(═O)(Ar1)2, S(═O)Ar1, S(═O)2Ar1, CR2═CR2Ar1, CN, NO2, Si(R2)3, B(OR2)2, B(R2)2, B(N(R2)2)2, OSO2R2, a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 40 C atoms or a straight-chain alkenyl or alkynyl group having 2 to 40 C atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group having 3 to 40 C atoms, each of which is optionally substituted by one or more radicals R2, where one or more, non-adjacent CH2 groups is optionally replaced by R2C═CR2, C≡C, Si(R2)2, Ge(R2)2, Sn(R2)2, C═O, C═S, C═Se, C═NR2, P(═O)(R2), SO, SO2, NR2, O, S or CONR2 and where one or more H atoms is optionally replaced by D, F, Cl, Br, I, CN or NO2, or an aromatic or heteroaromatic ring system having 5 to 60 aromatic ring atoms, which is optionally in each case be substituted by one or more radicals R2, or an aryloxy or heteroaryloxy group having 5 to 60 aromatic ring atoms, which is optionally substituted by one or more radicals R2, or a combination of these systems; two or more adjacent substituents R1 here may also form a mono- or polycyclic, aliphatic or aromatic ring system with one another; Ar1 is on each occurrence, identically or differently, an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms, which is optionally substituted by one or more radicals R2; two radicals Ar1 here which are bonded to the same nitrogen, phosphorus or boron atom are optionally linked to one another by 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 on each occurrence, identically or differently, H, D or an aliphatic, aromatic and/or heteroaromatic hydrocarbon radical having 1 to 20 C atoms, in which, in addition, H atoms is optionally replaced by D or F; two or more adjacent substituents R2 here optionally form a mono- or polycyclic, aliphatic or aromatic ring system with one another; n is 0 or 1; m is 0, 1, 2 or 3; o is 0, 1, 2, 3 or 4 if n=0 and is 0, 1, 2 or 3 if n=1. |
