Patent ID: 8304095

Claim:
An organic electroluminescent device comprising an anode, a cathode, and at least one organic layer capable of emitting light, wherein said at least one organic layer comprises at least one compound of formula (1) wherein R is, identically or differently on each occurrence, F; OCF 3 ; Si(R 2 ) 3 ; B(OR 2 ) 2 ; a straight-chain, branched, or cyclic alkyl, alkoxy or thioalkoxy group having 4 to 10 C atoms optionally substituted by one or more radicals R 1 , wherein one or more non-adjacent CH 2 groups are optionally replaced by —R 2 C═CR 2 —, —C≡C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , —O—, —S, or —CONR 2 —, and wherein one or more H atoms are optionally replaced by F, Cl, Br, I, CN or NO 2 ; wherein when R is an alkyl, alkoxy, or thioalkoxy group, R optionally has two bonds to the phenyl group to define a cyclic, condensed ring system; R 1 is, identically or differently on each occurrence, F; Cl; Br; I; CN; Si(R 2 ) 3 ; B(OR 2 ) 2 ; a straight-chain alkyl, alkoxy or thioalkoxy group having up to 40 C atoms optionally substituted by one or more radicals R 2 , wherein one or more non-adjacent CH 2 groups are optionally replaced by —R 2 C═CR 2 —, —C≡C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , —O—, —S, or —CONR 2 — and wherein one or more H atoms are optionally replaced by F, Cl, Br, I, CN, or NO 2 ; a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 40 C atoms optionally substituted by one or more radicals R 2 , wherein one or more non-adjacent CH 2 groups are optionally replaced by —R 2 C═CR 2 —, —C≡C—, Si(R 2 ) 2 , Ge(R 2 ) 2 , Sn(R 2 ) 2 , C═O, C═S, C═Se, C═NR 2 , —O—, —S, or —CONR 2 — and wherein one or more H atoms are optionally replaced by F, Cl, Br, I, CN, or NO 2 ; an aromatic or heteroaromatic ring system having 5 to 30 aromatic ring atoms optionally substituted by one or more radicals R 2 ; or an aryloxy or heteroaryloxy group having 5 to 24 aromatic ring atoms optionally substituted by one or more radicals R 2 ; or a combination of two, three, four, or five of these systems; and wherein two or more substituents R 1 optionally define a mono- or polycyclic, aliphatic or aromatic ring system with one another; R 2 is, identically or differently on each occurrence, H or a hydrocarbon radical having up to 20 C atoms, wherein said radical is aliphatic, aromatic, or a combination of aliphatic and aromatic and wherein individual H atoms are optionally replaced by fluorine; and wherein two or more radicals R 2 optionally define a mono- or polycyclic, aliphatic or aromatic ring system with one another; n is, identically or differently on each occurrence, 0, 1, 2, 3, or 4; p is, identically or differently on each occurrence, 0 or 1; and wherein the compound of formula (1) or formula (1a) is mixed with a host material and incorporated in an emitting layer.