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EP-3800677-B1 - ORGANIC LIGHT-EMITTING DEVICE AND APPARATUS INCLUDING THE SAME

EP3800677B1EP 3800677 B1EP3800677 B1EP 3800677B1EP-3800677-B1

Inventors

  • KIM, HYUNYOUNG
  • JUNG, HYEJIN
  • CHO, Kunwook
  • CHO, HYEONGU
  • CHOI, MINSOO
  • CHOI, Youngeun
  • JEONG, HYEIN
  • KIM, MINJE
  • KIM, EUNGDO
  • KIM, HYOJEONG
  • SHIN, HYOSUP
  • YOON, SEOKGYU
  • LEE, YOUNGKI
  • LEE, JUNGSUB
  • LEE, JIYOUNG

Dates

Publication Date
20260506
Application Date
20200928

Claims (15)

  1. An organic light-emitting device comprising: a first electrode (110); a second electrode (190) facing the first electrode; and an organic layer (150) between the first electrode and the second electrode, wherein the organic layer comprises an emission layer, characterized in that the emission layer comprises a first compound, a second compound, a third compound, and a fourth compound, the first compound is represented by Formula 1; the second compound is represented by Formula 2; the third compound is represented by Formula 3; the fourth compound is represented by any one of Formulae 4-1 to 4-3; and the first compound, the second compound, the third compound, and the fourth compound are different from each other: <Formula 3> M 31 (L 31 ) n31 (L 32 ) n32 <Formula 4-1> (D 41 ) n41 -(L 41 ) a41 -(A 41 ) m41 <Formula 4-2> (D41)n41-(L41)a41-(A41)m41-(L42)a42-(D42)n42 <Formula 4-3> (A 41 ) m41 -(L 41 ) a41 -(D 41 ) n41 -(L 42 ) a42 -(A 42 ) m42 wherein, in Formula 1, X 11 is selected from O, S, N(R 19 ), and C(R 19 )(R 20 ); R 11 to R 20 are each independently selected from: a group represented by *-(L 11 ) a11 -A 11 , hydrogen, deuterium, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q 1 )(Q 2 )(Q 3 ), - Si(Q 1 )(Q 2 )(Q 3 ), -B(Q 1 )(Q 2 ), and -N(Q 1 )(Q 2 ); a π electron-depleted nitrogen-free cyclic group substituted with at least one selected from deuterium, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ), and -N(Q 31 )(Q 32 ); and a π electron-depleted nitrogen-free cyclic group substituted with at least one π electron-depleted nitrogen-free cyclic group that is substituted with at least one selected from deuterium, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q 21 )(Q 22 )(Q 23 ), -Si(Q 21 )(Q 22 )(Q 23 ), -B(Q 21 )(Q 22 ), and -N(Q 21 )(Q 22 ), wherein the π electron-depleted nitrogen-free cyclic group is not an anthracene group; L 11 is selected from: a π electron-depleted nitrogen-free cyclic group, -C(Q 1 )(Q 2 )-, -Si(Q 1 )(Q 2 )-, -B(Q 1 )-, and -N(Q 1 )-; and a π electron-depleted nitrogen-free cyclic group substituted with at least one selected from deuterium, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ), and -N(Q 31 )(Q 32 ), wherein the π electron-depleted nitrogen-free cyclic group is not an anthracene group; a11 is selected from 1, 2, and 3, and A 11 is selected from: a π electron-depleted nitrogen-free cyclic group; a π electron-depleted nitrogen-free cyclic group substituted with at least one selected from deuterium, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ), and -N(Q 31 )(Q 32 ); and a π electron-depleted nitrogen-free cyclic group substituted with at least one π electron-depleted nitrogen-free cyclic group that is substituted with at least one selected from deuterium, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q 21 )(Q 22 )(Q 23 ), -Si(Q 21 )(Q 22 )(Q 23 ), -B(Q 21 )(Q 22 ), and -N(Q 21 )(Q 22 ), wherein in Formula 2, L 21 to L 23 are each independently selected from a substituted or unsubstituted C 5 -C 30 carbocyclic group and a substituted or unsubstituted C 1 -C 30 heterocyclic group, a21 to a23 are each independently selected from 0, 1, and 2, and R 21 to R 23 are each independently selected from a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, - C(Q 1 )(Q 2 )(Q 3 ), -Si(Q 1 )(Q 2 )(Q 3 ), -B(Q 1 )(Q 2 ), -N(Q 1 )(Q 2 ), -P(Q 1 )(Q 2 ), -C(=O)(Q 1 ), - S(=O)(Q 1 ), -S(=O) 2 (Q 1 ), -P(=O)(Q 1 )(Q 2 ), and -P(=S)(Q 1 )(Q 2 ), wherein in Formula 3, M 31 is selected from a Period 4 transition metal, a Period 5 transition metal, and a Period 6 transition metal, L 31 is a ligand represented by one of Formulae 3A to 3D, L 32 is selected from a monodentate ligand, a bidentate ligand, and a tridentate ligand, n31 is 1 or 2, and n32 is selected from 0, 1, 2, 3, and 4, wherein in Formulae 3A to 3D, A 31 to A 34 are each independently selected from a C 5 -C 30 carbocyclic group and a C 1 -C 30 heterocyclic group, T 31 to T 34 are each independently selected from a single bond, a double bond, *-O-*', *-S-*', *-C(=O)-*', *-S(=O)-*', *-C(R 35 )(R 36 )-*', *-C(R 35 )=C(R 36 )-*', *-C(R 35 )=*', *-Si(R 35 )(R 36 )-*', *-B(R 35 )-*', *-N(R 35 )-*', and *-P(R 35 )-*', k31 to k34 are each independently selected from 1, 2, and 3, Y 31 to Y 34 are each independently selected from a single bond, *-O-*', *-S-*', *-C(R 37 )(R 38 )-*', *-Si(R 37 )(R 38 )-*', *-B(R 37 )-*', *-N(R 37 )-*', and *-P(R 37 )-*', *1, *2, *3, and *4 each indicate a binding site to M 31 , R 31 to R 38 are each independently selected from hydrogen, deuterium, -F, -Cl, - Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, - C(Q 1 )(Q 2 )(Q 3 ), -Si(Q 1 )(Q 2 )(Q 3 ), -B(Q 1 )(Q 2 ), -N(Q 1 )(Q 2 ), -P(Q 1 )(Q 2 ), -C(=O)(Q 1 ), - S(=O)(Q 1 ), -S(=O) 2 (Q 1 ), -P(=O)(Q 1 )(Q 2 ), and -P(=S)(Q 1 )(Q 2 ), wherein R 31 to R 38 are optionally linked to each other to form a substituted or unsubstituted C 5 -C 60 carbocyclic group or a substituted or unsubstituted C 1 -C 60 heterocyclic group, and b31 to b34 are each independently an integer from 0 to 10, wherein in Formulae 4-1 to 4-3, A 41 and A 42 are each independently selected from: a π electron-depleted nitrogen-free cyclic group, -Si(Q 1 )(Q 2 )(Q 3 ), - B(Q 1 )(Q 2 ), and -N(Q 1 )(Q 2 ); a π electron-depleted nitrogen-free cyclic group substituted with at least one selected from deuterium, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ), and -N(Q 31 )(Q 32 ); and a π electron-depleted nitrogen-free cyclic group substituted with at least one π electron-depleted nitrogen-free cyclic group that is substituted with at least one selected from deuterium, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q 21 )(Q 22 )(Q 23 ), -Si(Q 21 )(Q 22 )(Q 23 ), -B(Q 21 )(Q 22 ), and -N(Q 21 )(Q 22 ), m41 and m42 are each independently selected from 1, 2, and 3, D 41 and D 42 are each independently selected from: -F, a cyano group, a π electron-depleted nitrogen-containing cyclic group, a C(=O)-containing group, a S(=O)-containing group, a S(=O) 2 -containing group, a P(=O)-containing group, and a P(=S)-containing group; a π electron-depleted nitrogen-containing cyclic group, a C(=O)-containing group, a S(=O)-containing group, a S(=O) 2 -containing group, a P(=O)-containing group, and a P(=S)-containing group, each substituted with at least one selected from deuterium, -F, a cyano group, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-containing cyclic group, and a π electron-depleted nitrogen-free cyclic group; a π electron-depleted nitrogen-containing cyclic group, a C(=O)-containing group, a S(=O)-containing group, a S(=O) 2 -containing group, a P(=O)-containing group, and a P(=S)-containing group, each substituted with at least one selected from a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-containing cyclic group and a π electron-depleted nitrogen-free cyclic group that are each independently substituted with at least one selected from deuterium, - F, a cyano group, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-containing cyclic group, and a π electron-depleted nitrogen-free cyclic group; a C 1 -C 60 alkyl group and a π electron-depleted nitrogen-free cyclic group, each substituted with at least one selected from -F, a cyano group, and a π electron-depleted nitrogen-containing cyclic group; a C 1 -C 60 alkyl group and a π electron-depleted nitrogen-free cyclic group, each substituted with at least one π electron-depleted nitrogen-containing cyclic group that is substituted with at least one selected from deuterium, -F, a cyano group, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-containing cyclic group, and a π electron-depleted nitrogen-free cyclic group; and a C 1 -C 60 alkyl group and a π electron-depleted nitrogen-free cyclic group, each substituted with at least one selected from a C 1 -C 60 alkyl group and a π electron-depleted nitrogen-free cyclic group that are each independently substituted with at least one selected from -F, a cyano group, and a π electron-depleted nitrogen-containing cyclic group, n41 and n42 are each independently selected from 1, 2, and 3, L 41 and L 42 are each independently selected from: a π electron-depleted nitrogen-free cyclic group, -C(Q 1 )(Q 2 )-, -Si(Q 1 )(Q 2 )-, -B(Q 1 )-, and -N(Q 1 )-; and a π electron-depleted nitrogen-free cyclic group substituted with at least one selected from deuterium, a C 1 -C 60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ), and -N(Q 31 )(Q 32 ), and a41 and a42 are each independently selected from 0, 1, 2, and 3, wherein in Formulae 1, 2, 3, and 4-1 to 4-3, at least one substituent of the substituted C 1 -C 60 alkyl group, the substituted C 2 -C 60 alkenyl group, the substituted C 2 -C 60 alkynyl group, the substituted C 1 -C 60 alkoxy group, the substituted C 3 -C 10 cycloalkyl group, the substituted C 1 -C 10 heterocycloalkyl group, the substituted C 3 -C 10 cycloalkenyl group, the substituted C 1 -C 10 heterocycloalkenyl group, the substituted C 6 -C 60 aryl group, the substituted C 6 -C 60 aryloxy group, the substituted C 6 -C 60 arylthio group, the substituted C 1 -C 60 heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed heteropolycyclic group, the substituted C 5 -C 60 carbocyclic group, and the substituted C 1 -C 60 heterocyclic group is selected from: deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, and a C 1 -C 60 alkoxy group; a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, and a C 1 -C 60 alkoxy group, each substituted with at least one selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic 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 ), and -P(=O)(Q 11 )(Q 12 ); a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group; a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone 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 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic 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 ), and - P(=O)(Q 21 )(Q 22 ); and -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 ), and -P(=O)(Q 31 )(Q 32 ), 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 selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone 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 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, and a terphenyl group.
  2. The organic light-emitting device of claim 1, wherein (i) the first compound, the second compound, and the third compound are substantially not to emit light, and/or. (ii)wherein the fourth compound is to emit light, and/or(iii), wherein a ratio of a light emitted from the fourth compound to a total light emitted from the emission layer is 80% or more.
  3. The organic light-emitting device of any one of claims 1 to 2, wherein (i) at least one of R 11 to R 19 is represented by *-(L 11 ) a11 -A 11 ; and/or (ii), wherein X 11 is O, S, or N(R 19 ).
  4. The organic light-emitting device of any one of claims 1 to 3, wherein A 11 is selected from: a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, and a dinaphthothiophenyl group; a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, and a dinaphthothiophenyl group, each substituted with at least one selected from deuterium, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ), - Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ), and -N(Q 31 )(Q 32 ); and a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, and a dinaphthothiophenyl group, each substituted with a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, and a dinaphthothiophenyl group, each substituted with at least one selected from deuterium, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, -C(Q 21 )(Q 22 )(Q 23 ), -Si(Q 21 )(Q 22 )(Q 23 ), -B(Q 21 )(Q 22 ), and -N(Q 21 )(Q 22 ), preferably wherein A 11 is represented by one of Formulae 8-1 to 8-5: wherein, in Formulae 8-1 to 8-5, X 81 is selected from O, S, N(R 89 ), and C(R 89 )(R 90 ), R 81 to R 90 are each independently selected from hydrogen, deuterium, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group, and * indicates a binding site to a neighboring atom.
  5. The organic light-emitting device of any one of claims 1 to 4, wherein the first compound is represented by one of Formulae 1-1 to 1-9: wherein, in Formulae 1-1 to 1-9, L 11 , a11, A 11 , and R 11 to R 19 are each the same as respectively defined in connection with Formula 1.
  6. The organic light-emitting device of any one of claims 1 to 5, wherein (i) L 21 to L 23 in Formula 2 are each independently selected from a benzene group, a naphthalene group, a phenalene group, an anthracene group, a fluoranthene group, a triphenylene group, a phenanthrene group, a pyrene group, a chrysene group, a perylene group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a benzoisoquinoline group, a phthalazine group, a naphthyridine group, a quinoxaline group, a benzoquinoxaline group, a quinazoline group, a benzoquinazoline group, a fluorene group, a carbazole group, a dibenzofuran group, and a dibenzothiophene group; and a fluoranthene group, a triphenylene group, a phenanthrene group, a pyrene group, a chrysene group, a perylene group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a benzoisoquinoline group, a phthalazine group, a naphthyridine group, a quinoxaline group, a benzoquinoxaline group, a quinazoline group, a benzoquinazoline group, a fluorene group, a carbazole group, a dibenzofuran group, and a dibenzothiophene group, each substituted with at least one selected from deuterium, -F, a cyano group, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, an indeno fluorenyl group, an indolofluorenyl group, a benzofurofluorenyl group, a benzothienofluorenyl group, an indenocarbazolyl group, an indolocarbazolyl group, a benzofurocarbazolyl group, a benzothienocarbazolyl group, an indenodibenzofuranyl group, an indolodibenzofuranyl group, a benzofurodibenzofuranyl group, a benzothienodibenzofuranyl group, an indenodibenzothiophenyl group, an indolodibenzothiophenyl group, a benzofurodibenzothiophenyl group, a benzothienodibenzothiophenyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a benzoisoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, an azafluorenyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluorenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group, and a diazadibenzothiophenyl group; and/or. (ii) wherein R 21 to R 23 in Formula 2 are each independently selected from: a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthracenyl group, a phenanthrenyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a benzoisoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a benzoquinoxalinyl group, a benzoquinazolinyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an azafluorenyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluorenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group, and a diazadibenzothiophenyl group; a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthracenyl group, a phenanthrenyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a benzoisoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a benzoquinoxalinyl group, a benzoquinazolinyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an azafluorenyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluorenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group, and a diazadibenzothiophenyl group, each substituted with at least one selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 10 alkyl group, a C 1 -C 10 alkoxy group, a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthracenyl group, a phenanthrenyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a benzoisoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a benzoquinoxalinyl group, a benzoquinazolinyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an azafluorenyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluorenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group, a diazadibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ), - N(Q 31 )(Q 32 ), -P(Q 31 )(Q 32 ), -C(=O)(Q 31 ), -S(=O)(Q 31 ), -S(=O) 2 (Q 31 ), -P(=O)(Q 31 )(Q 32 ), and -P(=S)(Q 31 )(Q 32 ); and -C(Q 1 )(Q 2 )(Q 3 ), -Si(Q 1 )(Q 2 )(Q 3 ), -B(Q 1 )(Q 2 ), -N(Q 1 )(Q 2 ), -P(Q 1 )(Q 2 ), -C(=O)(Q 1 ), -S(=O)(Q 1 ), -S(=O) 2 (Q 1 ), -P(=O)(Q 1 )(Q 2 ), and -P(=S)(Q 1 )(Q 2 ), and wherein Q 1 to Q 3 and Q 31 to Q 33 are each independently selected from a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthracenyl group, a phenanthrenyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a benzoisoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a benzoquinoxalinyl group, a benzoquinazolinyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, an azafluorenyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluorenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group, and a diazadibenzothiophenyl group.
  7. The organic light-emitting device of any one of claims 1 to 6, wherein at least one selected from R 21 to R 23 is selected from a group represented by Formula 2A, a group represented by Formula 2B, -C(Q 1 )(Q 2 )(Q 3 ), and -Si(Q 1 )(Q 2 )(Q 3 ): wherein, in Formulae 2A and 2B, Y 21 is selected from a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthracenyl group, a phenanthrenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, - C(Q 31 )(Q 32 )(Q 33 ), and -Si(Q 31 )(Q 32 )(Q 33 ), R 24 to R 27 are each independently selected from hydrogen, deuterium, a C 1 -C 10 alkyl group, a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthracenyl group, a phenanthrenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ), and - Si(Q 31 )(Q 32 )(Q 33 ), Q 1 to Q 3 and Q 31 to Q 33 are each independently selected from a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthracenyl group, a phenanthrenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group, and * indicates a binding site to a neighboring atom.
  8. The organic light-emitting device of any one of claims 1 to 7, wherein the third compound is represented by Formula 3-1 or Formula 3-2: wherein, in Formulae 3-1 and 3-2, X 31 to X 40 are each independently selected from N and C, and M 31 , A 31 to A 34 , R 31 to R 34 , b31 to b34, Y 31 to Y 34 , T 31 to T 33 , k31 to k33, L 362 , n31 and n32 are each the same as respectively defined in connection with Formula 3.
  9. The organic light-emitting device of any one of claims 1 to 8, wherein A 41 and A 42 are each independently selected from a group represented by Formula 12, - Si(Q 1 )(Q 2 )(Q 3 ), -B(Q 1 )(Q 2 ), and -N(Q 1 )(Q 2 ): wherein, in Formula 12, X 121 is selected from O, S, N(R 123 ), and C(R 123 )(R 124 ), X 122 is selected from a single bond, O, S, N(R 125 ), and C(R 125 )(R 126 ), A 121 and A 122 are each independently selected from a benzene group, a naphthalene group, a phenalene group, an anthracene group, a fluoranthene group, a triphenylene group, a phenanthrene group, a pyrene group, a chrysene group, a perylene group, a fluorene group, a carbazole group, a dibenzofuran group, and a dibenzothiophene group, R 121 to R 126 are each independently selected from: a binding site, hydrogen, deuterium, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, - Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ), and -N(Q 31 )(Q 32 ); and a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, and a dinaphthothiophenyl group, each substituted with at least one selected from deuterium, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, - Si(Q 21 )(Q 22 )(Q 23 ), -B(Q 21 )(Q 22 ), and -N(Q 21 )(Q 22 ), wherein R 123 and R 124 are optionally linked to each other to form a π electron-depleted nitrogen-free cyclic group, R 125 and R 126 are optionally linked to each other to form a π electron-depleted nitrogen-free cyclic group, and at least one selected from R 121 to R 126 is the binding site, and b121 and b122 are each independently selected from 1, 2, 3, 4, 5, and 6.
  10. The organic light-emitting device of any one of claims 1 to 9, wherein D 41 and D 42 are each independently selected from: -F, a cyano group, a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, an oxadiazole group, an isoxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an isothiadiazole group, a pyridine group, a pyrazine group, a pyridazine group, a pyrimidine group, a triazine group, a quinoline group, an isoquinoline group, a naphthyridine group, a quinoxaline group, a quinazoline group, and a group represented by one of Formulae 13-1 to 13-3; a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, an oxadiazole group, an isoxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an isothiadiazole group, a pyridine group, a pyrazine group, a pyridazine group, a pyrimidine group, a triazine group, a quinoline group, an isoquinoline group, a naphthyridine group, a quinoxaline group, and a quinazoline group, each substituted with at least one selected from deuterium, -F, a cyano group, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, a pyrazolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, an isoxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an isothiadiazolyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, and a quinazolinyl group; a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, an oxadiazole group, an isoxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an isothiadiazole group, a pyridine group, a pyrazine group, a pyridazine group, a pyrimidine group, a triazine group, a quinoline group, an isoquinoline group, a naphthyridine group, a quinoxaline group, and a quinazoline group, each substituted with at least one selected from a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, a pyrazolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, an isoxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an isothiadiazolyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, and a quinazolinyl group that are each independently substituted with at least one selected from deuterium, -F, a cyano group, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, a pyrazolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, an isoxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an isothiadiazolyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, and a quinazolinyl group; a C 1 -C 20 alkyl group, a benzene group, biphenyl group, terphenyl group, a naphthalene group, a phenanthrene group, a triphenylene group, a chrysene group, a fluoranthene group, a fluorene group, a carbazole group, a dibenzofuran group, a dibenzothiophene group, a benzofluorene group, a benzocarbazole group, a benzonaphthofuran group, a benzonaphthothiophene group, a dibenzofluorene group, a dibenzocarbazole group, a dinaphthofuran group, and a dinaphthothiophene group, each substituted with at least one selected from -F, a cyano group, a pyrazolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, an isoxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an isothiadiazolyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, and a quinazolinyl group; a C 1 -C 20 alkyl group, a benzene group, biphenyl group, terphenyl group, a naphthalene group, a phenanthrene group, a triphenylene group, a chrysene group, a fluoranthene group, a fluorene group, a carbazole group, a dibenzofuran group, a dibenzothiophene group, a benzofluorene group, a benzocarbazole group, a benzonaphthofuran group, a benzonaphthothiophene group, a dibenzofluorene group, a dibenzocarbazole group, a dinaphthofuran group, and a dinaphthothiophene group, each substituted with at least one selected from a pyrazolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, an isoxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an isothiadiazolyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, and a quinazolinyl group that are each independently substituted with at least one selected from deuterium, -F, a cyano group, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, a pyrazolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, an isoxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an isothiadiazolyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, and a quinazolinyl group; and a C 1 -C 20 alkyl group, a benzene group, biphenyl group, terphenyl group, a naphthalene group, a phenanthrene group, a triphenylene group, a chrysene group, a fluoranthene group, a fluorene group, a carbazole group, a dibenzofuran group, a dibenzothiophene group, a benzofluorene group, a benzocarbazole group, a benzonaphthofuran group, a benzonaphthothiophene group, a dibenzofluorene group, a dibenzocarbazole group, a dinaphthofuran group, and a dinaphthothiophene group, each substituted with at least one selected from a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, and a dinaphthothiophenyl group that are each independently substituted with at least one selected from -F, a cyano group, a pyrazolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, an isoxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an isothiadiazolyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, and a quinazolinyl group: wherein, in Formulae 13-1 to 13-3, X 131 is selected from C(=O), S(=O), S(=O) 2 , P(=O)(R 134 ), and P(=S)(R 134 ), X 132 is selected from O, S, C(=O), S(=O), S(=O) 2 , P(=O)(R 135 ), and P(=S)(R 135 ), k132 is 0 or 1, wherein, when k132 is 0, -(X 132 ) k132 - is a direct link, Y 131 is selected from O and S, A 131 and A 132 are each independently selected from a benzene group, a naphthalene group, a phenalene group, an anthracene group, a fluoranthene group, a triphenylene group, a phenanthrene group, a pyrene group, a chrysene group, a perylene group, a fluorene group, a carbazole group, a dibenzofuran group, and a dibenzothiophene group, R 131 to R 135 are each independently selected from: a binding site, hydrogen, deuterium, -F, a cyano group, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, a pyrazolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, an isoxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an isothiadiazolyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, and a quinazolinyl group; and a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, a pyrazolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, an isoxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an isothiadiazolyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, and a quinazolinyl group, each substituted with at least one selected from deuterium, -F, a cyano group, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, a pyrazolyl group, an imidazolyl group, a triazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, an isoxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an isothiadiazolyl group, a pyridinyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, and a quinazolinyl group, wherein at least one selected from R 131 to R 135 is the binding site, and b131 and b132 are each independently selected from 1, 2, 3, 4, 5, and 6.
  11. The organic light-emitting device of any one of claims 1 to 10, wherein L 41 and L 42 are each independently selected from: a benzene group, a naphthalene group, a phenalene group, an anthracene group, a fluoranthene group, a triphenylene group, a phenanthrene group, a pyrene group, a chrysene group, a perylene group, a fluorene group, a carbazole group, a dibenzofuran group, a dibenzothiophene group, -C(Q 1 )(Q 2 )- and -Si(Q 1 )(Q 2 )-; and a benzene group, a naphthalene group, a phenalene group, an anthracene group, a fluoranthene group, a triphenylene group, a phenanthrene group, a pyrene group, a chrysene group, a perylene group, a fluorene group, a carbazole group, a dibenzofuran group, and a dibenzothiophene group, each substituted with at least one selected from deuterium, a C 1 -C 20 alkyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthrenyl group, a triphenylenyl group, a chrysenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ), and -Si(Q 31 )(Q 32 )(Q 33 ).
  12. The organic light-emitting device of any one of claims 1 to 11, wherein: the first compound is selected from compounds of Group I; the second compound is selected from compounds of Group II, the third compound is selected from compounds of Group III-I and Group III-II, and the fourth compound is selected from compounds of Group IV:
  13. The organic light-emitting device of any one of claims 1 to 12, wherein: the first electrode is an anode, the second electrode is a cathode, the organic layer further comprises a hole transport region between the first electrode and the emission layer and/or an electron transport region between the emission layer and the second electrode, the hole transport region comprises a hole injection layer, a hole transport layer, an emission auxiliary layer, and/or an electron blocking layer, and the electron transport region comprises a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, and/or an electron injection layer.
  14. The organic light-emitting device of claim 13, wherein the hole blocking layer comprises a hole blocking material represented by Formula 2: wherein, in Formula 2, L 21 to L 23 are each independently selected from a substituted or unsubstituted C 5 -C 30 carbocyclic group and a substituted or unsubstituted C 1 -C 30 heterocyclic group, a21 to a23 are each independently selected from 0, 1, and 2, R 21 to R 23 are each independently selected from a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, - C(Q 1 )(Q 2 )(Q 3 ), -Si(Q 1 )(Q 2 )(Q 3 ), -B(Q 1 )(Q 2 ), -N(Q 1 )(Q 2 ), -P(Q 1 )(Q 2 ), -C(=O)(Q 1 ), - S(=O)(Q 1 ), -S(=O) 2 (Q 1 ), -P(=O)(Q 1 )(Q 2 ), and -P(=S)(Q 1 )(Q 2 ), and at least one substituent of the substituted C 3 -C 10 cycloalkyl group, the substituted C 1 -C 10 heterocycloalkyl group, the substituted C 3 -C 10 cycloalkenyl group, the substituted C 1 -C 10 heterocycloalkenyl group, the substituted C 6 -C 60 aryl group, the substituted C 6 -C 60 aryloxy group, the substituted C 6 -C 60 arylthio group, the substituted C 1 -C 60 heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed heteropolycyclic group is selected from: deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, and a C 1 -C 60 alkoxy group; a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, and a C 1 -C 60 alkoxy group, each substituted with at least one selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic 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 ), and -P(=O)(Q 11 )(Q 12 ); a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group; a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone 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 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic 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 ), and - P(=O)(Q 21 )(Q 22 ); and -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 ), and -P(=O)(Q 31 )(Q 32 ), 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 selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone 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 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a C 1 -C 60 alkyl group substituted with at least one selected from deuterium, -F, and a cyano group, a C 6 -C 60 aryl group substituted with at least one selected from deuterium, -F, and a cyano group, a biphenyl group, and a terphenyl group.
  15. An apparatus comprising: a thin-film transistor comprising a source electrode, a drain electrode, an activation layer, and a sealing part; and the organic light-emitting device of any one of claims 1 to 14, wherein the first electrode of the organic light-emitting device is electrically connected to the source electrode or the drain electrode of the thin-film transistor.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority to the benefit of Korean Patent Application No. 10-2019-0123355, filed on October 4, 2019, in the Korean Intellectual Property Office. BACKGROUND 1. Field One or more embodiments relate to an organic light-emitting device and an apparatus including the same. 2. Description of Related Art Organic light-emitting devices are self emissive devices that have a wide viewing angle, a high contrast ratio, and/or a short response time, and/or show suitable (e.g., excellent) characteristics in terms of luminance, driving voltage, and/or response speed. In an organic light-emitting device, a first electrode is arranged on a substrate, and a hole transport region, an emission layer, an electron transport region, and a second electrode are sequentially formed on the first electrode. Holes provided from the first electrode may move toward the emission layer through the hole transport region, and electrons provided from the second electrode may move toward the emission layer through the electron transport region. The holes and the electrons, which are carriers, recombine in the emission layer to produce excitons. These excitons transition from an excited state to a ground state, thereby generating (e.g., emitting) light. The document US 2018/198074 A1 discloses a organic light emitting device comprising a combination of three compounds in the emission layer. SUMMARY Aspects according to one or more embodiments are directed toward an organic light-emitting device and an apparatus including the same. Additional aspects will be set forth in part in the description which follows and, in part, will be apparent from the description, or may be learned by practice of the presented embodiments of the disclosure. According to one or more embodiments, an organic light-emitting device comprises: a first electrode;a second electrode facing the first electrode; andan organic layer between the first electrode and the second electrode,wherein the organic layer includes an emission layer,the emission layer comprises a first compound, a second compound, a third compound, and a fourth compound,the first compound is represented by Formula 1;the second compound is represented by Formula 2;the third compound is represented by Formula 3;the fourth compound is represented by any one of Formulae 4-1 to 4-3; andthe first compound, the second compound, the third compound, and the fourth compound are different from each other:         Formula 3     M31(L31)n31(L32)n32         Formula 4-1     (D41)n41-(L41)a41-(A41)m41         Formula 4-2      (D41)n41-(L41)a41-(A41)m41-(L42)a42-(D42)n42         Formula 4-3     (A41)m41-(L41)a41-(D41)n41-(L42)a42-(A42)m42 In Formula 1, X11 may be selected from O, S, N(R19), and C(R19)(R20);R11 to R20 may each independently be selected from:a group represented by *-(L11)a11-A11, hydrogen, deuterium, a C1-C60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q1)(Q2)(Q3), - Si(Q1)(Q2)(Q3), -B(Q1)(Q2), and -N(Q1)(Q2);a π electron-depleted nitrogen-free cyclic group substituted with at least one selected from deuterium, a C1-C60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q31)(Q32)(Q33), -Si(Q31)(Q32)(Q33), -B(Q31)(Q32), and -N(Q31)(Q32); anda π electron-depleted nitrogen-free cyclic group substituted with at least one π electron-depleted nitrogen-free cyclic group that is substituted with at least one selected from deuterium, a C1-C60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q21)(Q22)(Q23), -Si(Q21)(Q22)(Q23), -B(Q21)(Q22), and -N(Q21)(Q22), wherein the π electron-depleted nitrogen-free cyclic group is not an anthracene group;L11 may be selected from:a π electron-depleted nitrogen-free cyclic group, -C(Q1)(Q2)-, -Si(Q1)(Q2)-, - B(Q1)-, and -N(Q1)-; anda π electron-depleted nitrogen-free cyclic group substituted with at least one selected from deuterium, a C1-C60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q31)(Q32)(Q33), -Si(Q31)(Q32)(Q33), -B(Q31)(Q32), and -N(Q31)(Q32), wherein the π electron-depleted nitrogen-free cyclic group is not an anthracene group;a11 may be selected from 1, 2, and 3, andA11 may be selected from:a π electron-depleted nitrogen-free cyclic group;a π electron-depleted nitrogen-free cyclic group substituted with at least one selected from deuterium, a C1-C60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q31)(Q32)(Q33), -Si(Q31)(Q32)(Q33), -B(Q31)(Q32), and -N(Q31)(Q32); anda π electron-depleted nitrogen-free cyclic group substituted with at least one π electron-depleted nitrogen-free cyclic group that is substituted with at least one selected from deuterium, a C1-C60 alkyl group, a π electron-depleted nitrogen-free cyclic group, -C(Q21)(Q22)(Q23), -Si(Q21)(Q22)(Q23), -B(Q21)(Q22), and -N(Q21)(Q22). In Formula 2, L21 to L23 may each independently be selected from a substituted or unsubstituted C5-C30 carbocyclic gro