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 1B;
• and
• a second compound represented by one of Chemical Formula 2A, Chemical Formula 2C, and Chemical Formula 2F,
• wherein, in Chemical Formula 1B,
• Ar1 is a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, or a substituted or unsubstituted naphthyl group,
• L1 to L3 are each independently a single bond or a substituted or unsubstituted phenylene group,
• R1 to R4 are each independently a substituted or unsubstituted C1 to C10 alkyl group or a substituted or unsubstituted C6 to C20 aryl group, and
• R5 to R10 are each independently hydrogen, deuterium, a cyano group, a halogen, a substituted or unsubstituted amine group, a substituted or unsubstituted C1 to C10 alkyl group, or a substituted or unsubstituted C6 to C12 aryl group;
• wherein, in Chemical Formula 2A, Chemical Formula 2C and Chemical Formula 2F,
• X1 is O or S,
• Z1 to Z3 are each independently N or CRf, at least two of Z1 to Z3 being N,
• Rf and R11 to R17 are each independently hydrogen, deuterium, a cyano group, a substituted or unsubstituted C1 to C10 alkyl group, or a substituted or unsubstituted C6 to C12 aryl group,
• L4 to L6 are each independently a single bond or a substituted or unsubstituted phenylene group,
• Ar2 and Ar3 are each independently a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group or a substituted or unsubstituted dibenzosilolyl group,
• * is a linking point, and
• “substituted” refers to replacement of at least one hydrogen of a substituent or a compound by deuterium, a C1 to C20 alkyl group, a C6 to C30 aryl group, or a cyano group.