Organic molecules for use in organic optoelectronic devices

An organic molecule comprising

• a first chemical unit comprising or consisting of a structure of the formula A1:
• at least one second chemical unit comprising or consisting of a structure of the formula D1:
• with
• #=point of attachment of the second chemical unit to the first chemical unit;
• RN comprises or consists of a structure of the formula N1:
• with
• §=point of attachment of the chemical unit of formula N1 to the first chemical unit;
• RN2 is the same or different at each instance and is H, phenyl or naphthyl;
• Ra is the same or different at each instance and is selected from the group consisting of a point of attachment of the first chemical unit to the second chemical unit and H;
• Rb at each instance is independently selected from the group consisting of H, deuterium, CF3, C(═O)R1, CN, carbazolyl which is unsubstituted or substituted by one or more R2, Si(R4)3, an alkyl group which is unsubstituted or substituted by one or more R2, an aryl group which is unsubstituted or substituted by one or more R2, and a heteroaryl group which is unsubstituted or substituted by one or more R2;
• R1 independently at each instance is an aryl group which is unsubstituted or substituted by one or more R3;
• R2 at each instance is independently selected from the group consisting of CF3, C(═O)R1, CN, an alkyl group which is unsubstituted or substituted by one or more R3, an aryl group which is unsubstituted or substituted by one or more R3, and a heteroaryl group which is unsubstituted or substituted by one or more R3;
• R3 at each instance is independently selected from the group consisting of an unsubstituted alkyl group, an unsubstituted aryl group and an unsubstituted heteroaryl group;
• R4 at each instance is independently selected from the group consisting of an aryl group which is unsubstituted or substituted by one or more R3, and a heteroaryl group which is unsubstituted or substituted by one or more R3;
• where two or more of the R1, R2 and R3 substituents together optionally form a monocyclic;
• polycyclic, aliphatic, aromatic and/or benzofused ring system;
• where not less than one and not more than three RN2 is phenyl or naphthyl.