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

A composition for an organic optoelectronic device, comprising:

• a first compound;
• a second compound;
• and
• a third compound,
• wherein the first compound is represented by Chemical Formula 1,
• the second compound is represented by Chemical Formula 2 or a combination of Chemical Formula 3 and Chemical Formula 4, and
• the third compound is represented by Chemical Formula 5:
• wherein, in Chemical Formula 1,
• Z1 to Z3 are N or C-La-Ra,
• at least two of Z1 to Z3 are N,
• La and L1 to L3 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,
• R1 and R2 are each independently a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof,
• Ra and R3 to R6 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
• ring A is represented by one of Chemical Formula I-1 to Chemical Formula I-6,
• wherein, in Chemical Formula I-1 to Chemical Formula I-6,
• X1 is O, S, or NR,
• Rb and R7 to R22 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
• * is a linking point;
• wherein, in Chemical Formula 2,
• 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,
• L4 and L5 are each independently a single bond or a substituted or unsubstituted C6 to C20 arylene group,
• R23 to R33 are each independently hydrogen, deuterium, a cyano group, a halogen, a substituted or unsubstituted amine group, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C2 to C30 heterocyclic group,
• m1 and m2 are each independently an integer of 1 to 3,
• m3 is an integer of 1 to 4, and
• n is an integer of 0 to 2;
• wherein, in Chemical Formulas 3 and 4,
• 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,
• among b1* to b4* in Chemical Formula 3, two adjacent ones are each a linking carbon (C) that is linked to * in Chemical Formula 4,
• among b1* to b4* in Chemical Formula 3, the remaining two that are not linked to * in Chemical Formula 4 are each independently C-Lb-Rc,
• Lb, L6, and L7 are each independently a single bond or a substituted or unsubstituted C6 to C20 arylene group, and
• Rc and R34 to R41 are each independently hydrogen, deuterium, a cyano group, a halogen, a substituted or unsubstituted amine group, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted C6 to C30 aryl group, or a substituted or unsubstituted C2 to C30 heterocyclic group;
• wherein, in Chemical Formula 5,
• R42 to R44 and R47 to R54 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,
• m13 and m14 are each independently an integer of 1 to 4,
• m15 is an integer of 1 to 3, and
• L8 is a single bond or a substituted or unsubstituted C6 to C20 arylene group including at least one of a meta-phenylene group and a para-phenylene group.