Compound, organic optoelectronic diode, and display device

A compound represented by Formula 1-1 and Formula 2-1:

• wherein, in Formula 1-1 and Formula 2-1,
• X1 is —O— or —S—,
• Ar1 is a substituent having electron characteristics or a substituent having hole characteristics,
• R1 to R6 are each independently hydrogen, deuterium, a cyano group, a substituted or unsubstituted C1 to C60 alkyl group, a substituted or unsubstituted C6 to C60 aryl group, a substituted or unsubstituted C2 to C60 heteroaryl group, or a combination thereof,
• L1 is a single bond, a substituted or unsubstituted C6 to C60 arylene group, or a substituted or unsubstituted C2 to C60 heteroarylene group,
• n1 is one of integers of 0 to 2,
• * is a linking point of Formula 1-1 and Formula 2-1, and
• FuseR1 and FusedR2 are each independently a substituted or unsubstituted C3 to C60 fused ring.