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

A composition for an organic optoelectronic element, comprising:

• a first compound for an organic optoelectronic element, represented by a combination of Chemical Formula 1 and Chemical Formula 2, and
• a second compound for an organic optoelectronic element, represented by a combination of Chemical Formula 3 and Chemical Formula 4:
• wherein, in Chemical Formula 1 and Chemical Formula 2,
• Ar is a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof,
• adjacent two of a1* to a4* are C linked with b1* and b2*, respectively,
• the rest of a1* to a4*, not linked with b1* and b2*, are independently C-La-Ra,
• La and L1 to L4 are 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,
• Ra and R1 to R4 are independently hydrogen, deuterium, a cyano group, a substituted or unsubstituted amine group, 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, or a combination thereof, and
• at least one of Ra and R1 to R4 is a group represented by Chemical Formula a,
• wherein, in Chemical Formula a,
• Lb and Lc are 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,
• Rb and RC are independently a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof, and
• * is a linking point with La and L1 to L4;
• wherein, in Chemical Formula 3 and Chemical Formula 4,
• X is O or S,
• d1* and d2* are C linked with c1* and c2*, respectively, or d1* and d2* are C linked with c2* and c1*, respectively
• L5 and L6 are 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,
• R5 to R10 are independently hydrogen, deuterium, a cyano group, a substituted or unsubstituted amine group, 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, or a combination thereof, and
• at least one of R5 and R6 is a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a combination thereof