Organic molecules for use as emitters

An organic molecule comprising a structure of formula D:

• wherein
• R″ is R or an organic bridge via which a second same or different unit of formula D is bound forming a dimeric system and wherein at least one R at the aryl ring is a donor group comprising a structure of formula I
• wherein
• A and B are independently selected from the group consisting of CRR′, CR, NR, and N, wherein there is a single or a double bond between A and B and a single or a double bond between B and Z;
• Z is a direct bond or a divalent organic bridge group selected from the group consisting of a substituted or un substituted C1-C9-alkylene, C2-C8-alkenylene, C2-C8-alkynylene or arylene group or a combination of these, —CRR′, —C═CRR′, —C═NR, —NR—, —O—, —SiRR′—, —S—, —S(O)—, —S(O)2—, and O-interrupted substituted or unsubstituted C1-C9-alkylene, C2-C8-alkenylene, C2-C8-alkynylene or arylene groups, or phenyl or substituted phenyl units;
• wherein the waved line indicates the position over which R is bound to the aryl ring;
• wherein each R and R′ at each occurrence is the same or different H, deuterium, azide (N3−), F, Cl, Br, I, N(R2)2, CN, CF3, NO2, OH, COOH, COOR2, CO(NR2)2, Si(R2)3, B(OR2)2, C(═O)R2, P(═O)(R2)2, S(═O)R2, S(═O)2R2, OSO2R2, a linear alkyl, alkoxy or thioalkoxy group with 1 to 40 C-atoms or a linear alkenyl or alkynyl group with 2 to 40 C-atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group with 3 to 40 C-atoms, which each can be substituted by one or more radicals R2, wherein one or more not adjacent CH2-groups can be 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 wherein one or more H-atoms can be replaced by deuterium, F, Cl, Br, I, CN, CF3 or NO2, or an aromatic or heteroaromatic ring system with 5 to 60 aromatic ring atoms, which each can be substituted by one or more radicals R2, or an aryloxy or heteroaryloxy group with 5 to 60 aromatic ring atoms, which can be substituted by one or more radicals R2, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group with 10 to 40 aromatic ring atoms, which can be substituted by one or more radicals R2, or a combination of these systems, or a cross-linkable unit, whereby two or more of the substituents R and R′ can also form with each other a mono- or polycyclic, aliphatic, aromatic and/or benzoannulated ring system;
• R2 is at each occurrence is the same or different H, deuterium, F, Cl, Br, I, N(R3)2, CN, CF3, NO2, OH, COOH, COOR3, CO(NR3)2, Si(R3)3, B(OR3)2, C(═O)R3, P(═O)(R3)2, S(═O)R3, S(═O)2R3, OSO2R3, a linear alkyl, alkoxy or thioalkoxy group with 1 to 40 C-atoms or a linear alkenyl or alkynyl group with 2 to 40 C-atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group with 3 to 40 C-atoms, which each can be substituted by one or more radicals R3, wherein one or more not adjacent CH2-groups can be replaced by R3C═CR3, C≡C, Si(R3)2, Ge(R3)2, Sn(R3)2, C═O, C═S, C═Se, C═NR3, P(═O)(R3), SO, SO2, NR3, O, S or CONR3 and wherein one or more H-atoms can be replaced by deuterium, F, Cl, Br, I, CN, CF3 or NO2, or an aromatic or heteroaromatic ring system with 5 to 60 aromatic ring atoms, which each can be substituted by one or more radicals R3, or an aryloxy or heteroaryloxy group with 5 to 60 aromatic ring atoms, which can be substituted by one or more radicals R3, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group with 10 to 40 aromatic ring atoms, which can be substituted by one or more radicals R3, or a combination of these systems;
• whereby two or more of these substituents R2 can also form with each other a mono- or polycyclic, aromatic and/or benzoannulated ring system;
• R3 is at each occurrence is the same or different H, deuterium, F, CF3 or an aliphatic, aromatic and/or heteroaromatic hydrocarbon radical with 1 to 20 C-atoms, in which one or more H-atoms can be replaced by F or CF3;
• whereby two or more substituents R3 can form with each other a mono- or polycyclic aliphatic ring system,
• wherein at least one of the donor groups of formula I comprises a structure of formula II:
• wherein
• Z is a direct bond or a divalent organic bridge group selected from the group consisting of a substituted or unsubstituted C1-C9-alkylene, C2-C8-alkenylene, C2-C8-alkynylene or arylene group or a combination of these, —CRR′, —C═CRR′, —C═NR—, —NR—, —O—, —SiRR′—, —S—, —S(O)—, —S(O)2—, and O-interrupted substituted or unsubstituted C1-C9-alkylene, C2-C8-alkenylene, C2-C8-alkynylene or arylene groups, phenyl or substituted phenyl units;
• wherein the waved line indicates the linkage position of D;
• each R and R′ at each occurrence is same or different H, deuterium, F, Cl, Br, I, N(R2)2, CN, CF3, NO2, OH, COOH, COOR2, CO(NR2)2, Si(R2)3, B(OR2)2, C(═O)(R2), P(═O)(R2)2, S(═O)R2, S(═O)2R2, OSO2R2, a linear alkyl, alkoxy or thioalkoxy group with 1 to 40 C-atoms or a linear alkenyl or alkenyl group with 2 to 40 C-atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group with 3 to 40 C-atoms, which each can be substituted by one or more radicals R2, wherein one or more not adjacent CH2-groups 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 wherein one or more H-atoms can be replaced by deuterium, F, Cl, Br, I, CN, CF3 or NO2 or an aromatic or heteroaromatic ring system with 5 to 60 aromatic ring atoms, which each can be substituted by one or more radicals R2, or an aryloxy or heteroaryloxy group with 5 to 60 aromatic ring atoms, which can be substituted by one or more radicals R2, a diarylamino group, diheteroarylamino group or arylheteroarylamino group with 10 to 40 aromatic ring atoms, which can be substituted by one or more radicals R2, or a combination of these systems, or a cross-linkable unit, which can be cross-linked by acid-catalyzed thermal or UV cross-linking processes;
• thereby two or more of the substituents R and R′ can form with each other a mono- or polycyclic, aliphatic, aromatic and/or benzoannulated ring system;
• R2 is at each occurrence is the same or different H, deuterium F, Cl, Br, I, N(R3)2, CN, CF3, NO2, OH, COOH, COOR3, CO(NR3)2, Si(R3)3, B(OR3)2, C(═O)R3, P(═O)(R3)2, S(═O)R3, S(═O)2R3, OSO2R3, a linear alkyl, alkoxy or thioalkoxy group with 1 to 40 C-atoms or a linear alkenyl or alkynyl group with 2 to 40 C-atoms or a branched or cyclic alkyl, alkenyl, alkynyl, alkoxy or thioalkoxy group with 3 to 40 C-atoms, which each can be substituted by one or more radicals R3, wherein one or more not adjacent CH2-groups can be replaced by R3C═CR3, C≡C, Si(R3)2, Ge(R3)2, Sn(R3)2, C═O, C═S, C═Se, C═NR3, P(═O)(R3), SO, SO2, O, S or CONR3 and wherein one or more H-atoms can be replaced by deuterium, F, Cl, Br, I, CN, CF3 or NO2, or an aromatic or heteroaromatic ring system with 5 to 60 aromatic ring atoms, which each can be substituted by one or more radicals R3, or an aryloxy or heteroaryloxy group with 5 to 60 aromatic ring atoms, which can be substituted by one or more radicals R3, or a diarylamino group, diheteroarylamino group or arylheteroarylamino group with 10 to 40 aromatic ring atoms, which can be substituted by one or more radicals R3, or a combination of these systems;
• thereby two or more of these substituents R2 can also form with each other a mono- or polycyclic, aromatic and/or benzoannulated ring system;
• and
• R3 is at each occurrence is the same or different H, deuterium, F, CF3 or an aliphatic, aromatic and/or heteroaromatic hydrocarbon radical with 1 to 20 C-atoms, in which one or more H-atoms can also be replaced by F or CF3;
• thereby two or more substituents R3 can also form with each other a mono- or polycyclic aliphatic ring system.