Compound for organic optoelectronic device, organic light emitting diode including the same and display device including the same

A compound for an organic optoelectronic device, the compound being represented by the following Chemical Formula 1:

• wherein, in Chemical Formula 1,
• Ar1 is hydrogen or a substituted or unsubstituted C18 to C40 fluorenyl group,
• L1 is selected from the group of a substituted or unsubstituted C1 to C30 alkylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C1 to C30 heteroarylene group, and N,
• X1 to X3 are each independently selected from the group of N, NR′1, O, S, and CR′2, provided that at least two of X1 to X3 are selected from the group of N, O, and S,
• R, R′1, and to R′2 are each independently selected from the group of hydrogen, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C1 to C30 alkylene group, a substituted or unsubstituted C2 to C30 alkenyl group, a substituted or unsubstituted C2 to C30 alkenylene group, a substituted or unsubstituted C6 to C30 aryl group, and a substituted or unsubstituted C1 to C30 heteroaryl group, and optionally adjacent two of R, R′1, and to R′2 form a fused ring,
• a is an integer of 1 to 4, and
• R1 to R4 are each independently hydrogen or a substituted or unsubstituted C1 to C10 alkyl group.