Light emitting element and nitrogen-containing compound for the same

A light emitting element comprising:

• a first electrode;
• a second electrode disposed on the first electrode;
• and
• at least one functional layer disposed between the first electrode and the second electrode and comprising a nitrogen-containing compound selected from Compound Group 1:

A nitrogen-containing compound represented by Formula 1:

• wherein in Formula 1,
• n1 is an integer from 0 to 2,
• L1 is a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring-forming carbon atoms,
• Ar1 is a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, and
• Ar2 is a group represented by one of Ar2-1 to Ar2-6:
• R1, R2 and R4 to R7 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a substituted or unsubstituted oxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 20 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 20 ring-forming carbon atoms, or are bonded to an adjacent group to form a ring,
• Ar2 and R3 are the same,
• Q1 is O, S, SO, Se, CO, C(R11)(R12), B(R13), P(R15), PO(R16), PS(R17), or a group represented by Formula 3,
• R11 and R12 are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 20 ring-forming carbon atoms, or are bonded to an adjacent group to form a ring, and
• R13 and R15 to R17 are each independently a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms:
• wherein in Ar2-1,
• a21 is an integer from 0 to 5,
• a22 is an integer from 0 to 4, and
• R51 and R52 are each independently a hydrogen atom, a deuterium atom, or an unsubstituted phenyl group,
• wherein in Ar2-4,
• a23 is 0 or 1, and
• W1 is N(Ph), O, or S,
• wherein in Ar2-5 and Ar2-6,
• one of W2 or W3 is a direct linkage, and
• the other of W2 and W3 is N(Ph), O, or S, and
• wherein in Ar2-4 to Ar2-6,
• Ph is a phenyl group,
• wherein in Formula 3,
• W1 is C, Si, or Ge,
• m1 is 0 or 1, and
• Z1 is a direct linkage, C(R32)(R33), N(R34), O, or S,
• a1 is an integer from 0 to 8,
• R31 to R34 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, or are bonded to an adjacent group to form a ring,
• when R3 is a hydrogen atom, Ar1 is a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazole group, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted dibenzothiophene group, or a substituted or unsubstituted dibenzosilole group, and
• when Ar2 is a group represented by Ar2-1, Q1 is a group represented by Formula 3, and Z1 is a direct linkage or N(R34).