Light-emitting device including heterocyclic compound and electronic apparatus including the light-emitting device
A light-emitting device and an electronic apparatus (including the light-emitting device) are provided. The light-emitting device includes a first compound represented by Formula 1 and a second compound represented by Formula 2: wherein detailed descriptions of Formula 1 and Formula 2 are the same as described in the present specification.
1 . A light-emitting device comprising:
a first electrode;
a second electrode facing the first electrode;
an interlayer between the first electrode and the second electrode and comprising an emission layer;
a first compound represented by Formula 1; and
a second compound represented by Formula 2:
wherein, in Formulae 1 and 2,
X 1 is N, B, P(═O), or P(═S),
X 2 is N, B, P(═O), or P(═S),
X 3 is N, B, P(═O), or P(═S),
X 4 is N, B, P(═O), or P(═S), L 1 is a single bond, a C 5 -C 30 carbocyclic group unsubstituted or substituted with at least one R 10a , or a C 1 -C 30 heterocyclic group unsubstituted or substituted with at least one R 10a ,
a1 is an integer from 0 to 3,
ring CY2 to ring CY5 are each independently a C 3 -C 60 carbocyclic group or a C 1 -C 60 heterocyclic group,
Ar 1 to Ar 6 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 1 -C 60 alkyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkenyl group unsubstituted or substituted with at least one R 10a , a C 2 -C 60 alkynyl group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 alkoxy group unsubstituted or substituted with at least one R 10a , a C 3 -C 60 carbocyclic group unsubstituted or substituted with at least one R 10a , a C 1 -C 60 heterocyclic group unsubstituted or substituted with at least one R 10a , a C 6 -C 60 aryloxy group unsubstituted or substituted with at least one R 10a , a C 6 -C 60 arylthio group unsubstituted or substituted with at least one R 10a , —Si(Q 1 )(Q 2 )(Q 3 ), —N(Q 1 )(Q 2 ), —B(Q 1 )(Q 2 ), —C(═O)(Q 1 ), —S(═O) 2 (Q 1 ), and —P(═O)(Q 1 )(Q 2 ),
b1 to b5 are each an integer from 0 to 10, and
R 10a is:
deuterium (-D), —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, or a nitro group;
a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, or a C 1 -C 60 alkoxy group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 3 -C 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 7 -C 60 aryl alkyl group, a C 2 -C 60 heteroaryl alkyl group, —Si(Q 11 )(Q 12 )(Q 13 ), —N(Q 11 )(Q 12 ), —B(Q 11 )(Q 12 ), —C(═O)(Q 11 ), —S(═O) 2 (Q 11 ), —P(═O)(Q 11 )(Q 12 ), or any combination thereof;
a C 3 -C 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 7 -C 60 aryl alkyl group, or a C 2 -C 60 heteroaryl alkyl group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, a C 1 -C 60 alkoxy group, a C 3 -C 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, a C 6 -Coo arylthio group, a C 7 -Coo aryl alkyl group, a C 2 -C 60 heteroaryl alkyl group, —Si(Q 21 )(Q 22 )(Q 23 ), —N(Q 21 )(Q 22 ), —B(Q 21 )(Q 22 ), —C(═O)(Q 21 ), —S(═O) 2 (Q 21 ), —P(═O)(Q 21 )(Q 22 ), or any combination thereof; or
—Si(Q 31 )(Q 32 )(Q 33 ), —N(Q 31 )(Q 32 ), —B(Q 31 )(Q 32 ), —C(═O)(Q 31 ), —S(═O) 2 (Q 31 ), or —P(═O)(Q 31 )(Q 32 ), and
wherein Q 1 to Q 3 , Q 11 to Q 13 , Q 21 to Q 23 , and Q 31 to Q 33 are each independently hydrogen; deuterium; —F; —Cl; —Br; —I; a hydroxyl group; a cyano group; a nitro group; a C 1 -C 60 alkyl group; a C 2 -C 60 alkenyl group; a C 2 -C 60 alkynyl group; a C 1 -C 60 alkoxy group; a C 3 -C 60 carbocyclic group or a C 1 -C 60 heterocyclic group, each unsubstituted or substituted with deuterium, —F, a cyano group, a C 1 -C 60 alkyl group, a C 1 -C 60 alkoxy group, a phenyl group, a biphenyl group, or any combination thereof; a C 7 -C 60 aryl alkyl group; or a C 2 -C 60 heteroaryl alkyl group.
2 . The light-emitting device of claim 1 , wherein the emission layer comprises the first compound and the second compound.
3 . The light-emitting device of claim 2 , wherein each of the first compound and the second compound is a host.
4 . The light-emitting device of claim 2 , wherein the first compound and the second compound are different from each other.
5 . The light-emitting device of claim 2 , wherein the emission layer further comprises a dopant.
6 . The light-emitting device of claim 5 , wherein the dopant comprises a phosphorescent dopant, a delayed fluorescence material, or any combination thereof.
7 . The light-emitting device of claim 1 , wherein the emission layer is to emit blue light.
8 . The light-emitting device of claim 1 , wherein a ratio of an amount of the first compound to an amount of the second compound is in a range of 1:0.1 to 1:10.
9 . The light-emitting device of claim 1 , wherein, in Formulae 1 and 2,
X 1 is N, P(═O), or P(═S),
X 2 is N, P(═O), or P(═S),
X 3 is N, P(═O), or P(═S), and
X 4 is N, P(═O), or P(═S).
10 . The light-emitting device of claim 1 , wherein, in Formula 1, L 1 is:
a single bond; or
a benzene group or a carbazole group, each unsubstituted or substituted with at least one R 10a .
11 . The light-emitting device of claim 1 , wherein, in Formulae 1 and 2, ring CY2 to ring CY5 are each independently a benzene group, a naphthalene group, a carbazole group, a dibenzofuran group, a fluorene group, a dibenzothiophene group, or a dibenzosilole group, each unsubstituted or substituted with at least one R 10a .
12 . The light-emitting device of claim 1 , wherein, in Formula 1, ring CY2 is a group represented by one of Formulae CY2-1 to CY2-5:
wherein, in Formulae CY2-1 to CY2-5,
Ar 2 is the same as described in connection with Formula 1,
* indicates a binding site to X 1 in Formula 1, and
*′ indicates a binding site to an element included in ring CY3 in Formula 1.
13 . The light-emitting device of claim 1 , wherein, in Formula 1, ring CY3 is a group represented by one of Formulae CY3-1 to CY3-5:
wherein, in Formulae CY3-1 to CY3-5,
Ar 3 is the same as described in connection with Formula 1,
* indicates a binding site to X 1 in Formula 1, and
**′ indicates a binding site to an element included in ring CY2 in Formula 1.
14 . The light-emitting device of claim 1 , wherein, in Formula 2, ring CY4 is a group represented by one of Formulae CY4-1 to CY4-5:
wherein, in Formulae CY4-1 to CY4-5,
Ar 4 is the same as described in connection with Formula 1,
* indicates a binding site to X 2 in Formula 2, and
**′ indicates a binding site to X 3 in Formula 2.
15 . The light-emitting device of claim 1 , wherein, in Formula 2, ring CY5 is a group represented by one of Formulae CY5-1 to CY5-5:
wherein, in Formulae CY5-1 to CY5-5, Ar 3 is the same as described in connection with Formula 1,
* indicates a binding site to X 4 in Formula 2, and
**′ indicates a binding site to X 3 in Formula 2.
16 . The light-emitting device of claim 1 , wherein, in Formula 1, Ar 1 to Ar 3 are each independently:
hydrogen, deuterium, a group represented by —Si(Q 1 )(Q 2 )(Q 3 ); or a group represented by one of Formulae 4-1 to 4-10:
wherein, in Formulae 4-1 to 4-10,
X 41 is C(R 41a )(R 41b ), Si(R 41a )(R 41b ), N(R 41a ), O, S, or Se,
Q 1 to Q 3 are each independently the same as described in connection with Formula 1,
R 41a , R 41b , Z 41 , and Z 42 are each independently hydrogen or the same as described in connection with R 10a ,
e2 is an integer from 0 to 2,
e3 is an integer from 0 to 3,
e4 is an integer from 0 to 4,
e5 is an integer from 0 to 5,
e7 is an integer from 0 to 7, and
* indicates a binding site to a neighboring group.
17 . The light-emitting device of claim 1 , wherein, in Formula 2, Ar 4 to Ar 6 are each independently:
hydrogen, deuterium, a cyano group; or a group represented by one of Formulae 5-1 to 5-3:
wherein, in Formulae 5-1 to 5-3,
Z 51 and Z 52 are each independently hydrogen or the same as described in connection with R 10a ,
f2 is an integer from 0 to 2,
f4 is an integer from 0 to 4,
f5 is an integer from 0 to 4, and
* indicates a binding site to a neighboring group.
18 . An electronic apparatus comprising the light-emitting device of claim 1 .
19 . The electronic apparatus of claim 18 , further comprising a thin-film transistor, wherein
the thin-film transistor comprises a source electrode and a drain electrode, and
the first electrode of the light-emitting device is electrically connected to the source electrode or the drain electrode of the thin-film transistor.
20 . The electronic apparatus of claim 18 , further comprising a color filter, a color conversion layer, a touch screen layer, a polarizing layer, or any combination thereof.