Nitrogen-containing heterocyclic compounds and organic electronic device comprising the same

A nitrogen-containing heterocyclic compound represented by the following formula 1:

• wherein
• X is C or Si;
• one or more of R1 to R5 are each independently represented by -L-A, wherein L is a direct bond or a divalent group containing one or more selected from the group consisting of a substituted or unsubstituted aromatic cyclic group and a substituted or unsubstituted heterocyclic group, and A is a substituted or unsubstituted monocyclic heterocyclic group containing one or more N atoms;
• the remainder of R1 to R5 are selected from the group consisting of hydrogen, deuterium, a halogen group, a nitrile group, a nitro group, a hydroxyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted alkylthioxy group, a substituted or unsubstituted arylthioxy group, a substituted or unsubstituted alkylsulfoxy group, a substituted or unsubstituted arylsulfoxy group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted boron group, a substituted or unsubstituted alkylamine group, a substituted or unsubstituted aralkylamine group, a substituted or unsubstituted arylamine group, a substituted or unsubstituted heteroarylamine group, a substituted or unsubstituted aryl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazole group, and a substituted or unsubstituted heterocyclic group containing at least one heteroatom selected from N, O and S;
• a, b, d and e are each independently an integer ranging from 1 to 4;
• and
• c is an integer ranging from 1 to 3.