Organometallic complexes, and organic electroluminescence device and display using the same

An organometallic complex represented by Chemical Formula 1:

• wherein, in Chemical Formula 1,
• M is Ir, Os, Pt, Pb, Re, Ru, or Pd,
• CyN-M-CyC forms a heterocyclic ring and CyN—CyC is a cyclometalating ligand bonded with M through a nitrogen atom and a carbon atom;
• or CyN is a substituted or unsubstituted C2 to C60 heterocyclic group comprising a nitrogen atom bonded with M or a substituted or unsubstituted C3 to C60 heteroaryl group including a nitrogen atom bonded with M, CyC is a substituted or unsubstituted C4 to C60 carbon cyclic group including a carbon atom bonded with M, a substituted or unsubstituted C3 to C60 heterocyclic group including a carbon atom bonded with M, a substituted or unsubstituted C6 to C60 aryl group including a carbon atom bonded with M, a substituted or unsubstituted C7 to C60 arylalkyl group including a carbon atom bonded with M, or a substituted or unsubstituted C3 to C60 heteroaryl group including a carbon atom bonded with M, and CyN—CyC is a cyclometalating ligand bonded with M through a nitrogen atom and a carbon atom,
• X1 to X3 are independently N or CR′, provided at least one of X1 to X3 is a nitrogen atom,
• R1 to R3 and R′ are independently hydrogen, deuterium, a halogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkoxy group, a substituted or unsubstituted C3 to C30 cycloalkyl group, a substituted or unsubstituted C2 to C30 alkenyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C1 to C30 heteroaryl group, a substituted or unsubstituted C1 to C30 amino group, SF5, a trialkylsilyl group having a substituted or unsubstituted C1 to C30 alkyl group, a dialkylarylsilyl group having a substituted or unsubstituted C1 to C30 alkyl group and a C6 to C30 aryl group, a triarylsilyl group having a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted diaryl boronyl, or at least two of R1 to R3 are fused to form a fused ring, and
• n is an integer ranging from 0 to 2.