Composition for organic optoelectronic device, organic optoelectronic device and display device

A composition for an organic optoelectronic device, the composition comprising:

• a first compound represented by Chemical Formula 1, and
• a second compound represented by a combination of Chemical Formula 2 and Chemical Formula 3:
• wherein, in Chemical Formula 1,
• X1 is O or S,
• Z1 to Z3 are each independently N or CRa, at least two of Z1 to Z3 being N,
• L1 and L2 are each independently a single bond, a substituted or unsubstituted C6 to C20 arylene group, a substituted or unsubstituted C2 to C20 heterocyclic group, or a combination thereof,
• Ar1 and Ar2 are each independently a substituted or unsubstituted C6 to C30 aryl group or a substituted or unsubstituted C2 to C30 heterocyclic group,
• Ra and R1 to R7 are each independently hydrogen, deuterium, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, a substituted or unsubstituted silyl group, a substituted or unsubstituted amine group, a halogen, a cyano group, or a combination thereof, and
• at least one pair of R1 and R2;
• R2 and R3;
• R3 and R4;
• R5 and R6;
• and R6 and R7 are linked to each other to provide a substituted or unsubstituted aromatic ring or a substituted or unsubstituted heteroaromatic ring,
• wherein, in Chemical Formula 2 and Chemical Formula 3,
• X2 is O or S,
• two adjacent ones of a1* to a4* of Chemical Formula 2 are linking carbons linked at * of Chemical Formula 3,
• the remaining two of a1* to a4* of Chemical Formula 2, not linked at * of Chemical Formula 3, are CRb,
• Rb and R8 to R15 are each independently hydrogen, deuterium, a substituted or unsubstituted amine group, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C2 to C30 heterocyclic group, at least one of R8 to R15 being a group represented by Chemical Formula A, and
• R16 and R17 are each independently a substituted or unsubstituted C1 to C30 alkyl group or a substituted or unsubstituted C6 to C30 aryl group,
• wherein, in Chemical Formula A,
• L3 to L5 are each independently a single bond or a substituted or unsubstituted C6 to C30 arylene group,
• Ar3 and Ar4 are each independently a substituted or unsubstituted C6 to C30 aryl group or a substituted or unsubstituted C2 to C30 heterocyclic group, and
• * is linking point.