COMPOSITION, LIGHT-EMITTING DEVICE INCLUDING THE COMPOSITION, AND ELECTRONIC APPARATUS INCLUDING THE LIGHT-EMITTING DEVICE

1 . A composition comprising:

a first compound represented by Formula 1; and

a second compound comprising an azine group comprising at least one nitrogen:

wherein, in Formula 1,

rings A 11 , A 12 , A 21 , A 22 , A 31 , A 32 , A 41 , and A 42 are each a π electron-rich C 5 -C 60 cyclic group,

R 1 to R 3 are each independently:

hydrogen, deuterium, a C 1 -C 60 alkyl group, or a deuterated C 1 -C 60 alkyl group;

a π electron-rich C 5 -C 60 cyclic group unsubstituted or substituted with deuterium, a C 1 -C 60 alkyl group, a π electron-rich C 5 -C 60 cyclic group, or a combination thereof; or

*—Si(B′ 1 )(B′ 2 )(B′ 3 ),

wherein B′ 1 , B′ 2 , and B′ 3 are each a π electron-rich C 5 -C 60 cyclic group unsubstituted or substituted with at least one W′ 1 ,

R 4 to R 7 and W′ 1 are each independently:

hydrogen, deuterium, a C 1 -C 60 alkyl group, or a deuterated C 1 -C 60 alkyl group; or

a phenyl group or a biphenyl group, each unsubstituted or substituted with deuterium, a C 1 -C 60 alkyl group, a phenyl group, a biphenyl group, or a combination thereof,

wherein a1 to a4 are each independently an integer from 0 to 20,

a5 is an integer from 0 to 4,

a6 and a7 are each independently an integer from 0 to 5,

p and s are each independently 0 or 1, wherein p+s is 1 or 2,

m1 is 0, 1, 2, or 3, and

m2 is 1 or 2.

2 . The composition of claim 1 , wherein R 1 to R 3 in Formula 1 are each independently:

hydrogen, deuterium, a C 1 -C 20 alkyl group, or a deuterated C 1 -C 20 alkyl group; or

a phenyl group or an N-carbazolyl group, each unsubstituted or substituted with deuterium, a C 1 -C 20 alkyl group, a phenyl group, an N-carbazolyl group, or a combination thereof.

3 . The composition of claim 1 , wherein

p in Formula 1 is 0, and

a group represented by

 in Formula 1 is:

a group represented by one of Formulae ph-1 to ph-18; or

a group represented by one of Formulae ph-1 to ph-18, in which at least one hydrogen is substituted with deuterium:

wherein * in Formulae ph-1 to ph-18 indicates a binding site to a neighboring atom.

4 . The composition of claim 1 , wherein

p in Formula 1 is 1,

a group represented by

 in Formula 1 is:

a group represented by one of Formulae ph-51 to ph-58; or

a group one of Formulae ph-51 to ph-58, in which at least one hydrogen is substituted with deuterium:

wherein, in Formulae ph-51 to ph-58,

R 3 is as defined in claim 1 ,

a38 is an integer from 0 to 8, and

* indicates a binding site to a neighboring atom.

5 . The composition of claim 1 , wherein the first compound satisfies at least one of Conditions 1 to 4:

Condition 1

the number of carbazole groups in the first compound is 3 or more

Condition 2

the number of benzene groups linked to each other only via a carbon-carbon single bond in the first compound is 2 or more

Condition 3

the first compound comprises at least one deuterium

Condition 4

the first compound comprises at least one tert-butyl group.

6 . The composition of claim 1 , wherein the second compound comprises:

a triazine group; and

at least one carbazole group, at least one silicon-containing group, or a combination thereof.

7 . The composition of claim 1 , wherein the second compound is represented by Formula 2:

wherein, in Formula 2,

X 4 is N, C(H), or C(Z 14 ), X 5 is N, C(H), or C(Z 15 ), X 6 is N, C(H), or C(Z 16 ), wherein at least one of X 4 to X 6 is N,

Z 1 to Z 3 are each independently *—Si(Ar 1 )(Ar 2 )—*′, a C 5 -C 30 carbocyclic group unsubstituted or substituted with at least one R 0 , or a C 2 -C 30 heterocyclic group unsubstituted or substituted with at least one R 0 ,

e1 to e3 are each independently 0, 1, 2, or 3, i) when e1 is 0, a group represented by *—(Z 1 ) e1 —*′ is a single bond, ii) when e2 is 0, a group represented by *—(Z 2 ) e2 -*′ is a single bond, and i) when e3 is 0, a group represented by *—(Z 3 ) e3 -*′ is a single bond,

Z 11 to Z 13 are each independently *—Si(Ar 11 )(Ar 12 )(Ar 13 ), a C 5 -C 30 carbocyclic group unsubstituted or substituted with at least one R 0 , or a C 2 -C 30 heterocyclic group unsubstituted or substituted with at least one R 0 ,

Ar 1 , Ar 2 , and Ar 11 to Ar 13 are each independently a C 5 -C 30 carbocyclic group unsubstituted or substituted with at least one R 0 or a C 2 -C 30 heterocyclic group unsubstituted or substituted with at least one R 0 , and

R 0 and Z 14 to Z 16 are each independently:

deuterium, a C 1 -C 60 alkyl group, or a deuterated C 1 -C 60 alkyl group; or

a C 5 -C 30 carbocyclic group or a C 2 -C 30 heterocyclic group, each unsubstituted or substituted with deuterium, a C 1 -C 60 alkyl group, a deuterated C 1 -C 60 alkyl group, a C 5 -C 30 carbocyclic group, a C 2 -C 30 heterocyclic group, or a combination thereof.

8 . The composition of claim 7 , wherein the second compound is represented by Formula 2-1 or 2-2:

wherein, in Formulae 2-1 and 2-2,

Z 1 , Z 2 , e1, e2, and Z 11 are each as defined in claim 7 ,

Z 22 and Z 23 are each defined as for R 0 in claim 7 ,

e23 and e22 are each independently an integer from 0 to 8, and

Ar 21 , Ar 22 , and Ar 23 are defined as for Ar 11 , Ar 12 , and Ar 13 in claim 7 , respectively.

9 . The composition of claim 1 , wherein a triplet (T 1 ) energy level of the first compound is about 2.8 eV or greater.

10 . The composition of claim 1 , further comprising an emitter.

11 . The composition of claim 10 , wherein the emitter emits blue light.

12 . The composition of claim 10 , wherein

the emitter is an organometallic compound,

the organometallic compound comprises a transition metal and n ligands linked to the transition metal, and

n is an integer from 1 to 4.

13 . The composition of claim 12 , wherein

the transition metal is platinum (Pt) or palladium (Pd),

n is 1, and

the ligand is a tetradentate ligand.

14 . The composition of claim 13 , wherein the tetradentate ligand comprises a carbene moiety linked to the transition metal.

15 . The composition of claim 10 , wherein

the emitter is a multiple resonance thermally activated delayed fluorescence material,

the multiple resonance thermally activated delayed fluorescence material is a polycyclic compound i) not comprising a transition metal and ii) comprising a core in which two or more C 3 -C 60 cyclic groups are condensed to each other, and

at least two C 3 -C 60 cyclic groups of the core are condensed to each other while sharing boron (B) or nitrogen (N).

16 . The composition of claim 10 , further comprising a sensitizer.

17 . The composition of claim 16 , wherein

the sensitizer is an organometallic compound comprising a transition metal and a tetradentate ligand linked to the transition metal,

the transition metal is platinum (Pt) or palladium (Pd), and the tetradentate ligand comprises a carbene moiety linked to the transition metal.

18 . A light-emitting device comprising: a first electrode;

a second electrode; and

an interlayer between the first electrode and the second electrode and comprising an emission layer, wherein

the interlayer comprises the composition of claim 1 .

19 . The light-emitting device of claim 18 , wherein

the composition is comprised in the emission layer, and

the emission layer emits blue light.

20 . An electronic apparatus comprising the light-emitting device of claim 18 .