Compound for organic optoelectronic device, composition for organic optoelectronic device and organic optoelectronic device and display device

A compound for an organic optoelectronic device represented by Chemical Formula 1:

• wherein, in Chemical Formula 1,
• X1 to X3 are independently N or CRa,
• at least two of X1 to X3 are N,
• Ra and R1 to R5 are independently hydrogen, deuterium, a substituted or unsubstituted C1 to C10 alkyl group, or a substituted or unsubstituted C6 to C12 aryl group,
• Ar1 and Ar2 are independently hydrogen, deuterium, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof,
• at least one of Ar1 and Ar2 is a substituted or unsubstituted fluorenyl group,
• n1, n2, m1, and m2 are independently an integer of 0 to 2,
• 1≦m1+m2≦4, and
• the “substituted” refers to replacement of at least one hydrogen by deuterium, a C1 to C4 alkyl group, a C6 to C18 aryl group, or a C2 to C18 heteroaryl group.