Organometallic compound, organic light-emitting device including the same, and electronic device including the organic light-emitting device

Abstract

An organometallic compound, an organic light-emitting device including the same, and an electronic device including the organic light-emitting device are provided.SOLUTION: Provided are an organometallic compound represented by Chemical Formula A and satisfying Inequality 1, an organic light-emitting device including the organometallic compound, and an electronic device including the organic light-emitting device: LUNTO (A1) LUNTO (A2) Chemical Formula A and Inequality 1 are the same as described above.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to organometallic compounds, organic light-emitting devices containing the same, and electronic devices containing the organic light-emitting devices. [Background technology]

[0002] An organic light emitting device is a self-luminous device that is excellent in viewing angle, response time, brightness, driving voltage, response speed, etc., and is capable of being multicolored.

[0003] According to one example, an organic light-emitting device includes an anode, a cathode, and an organic layer including an emitting layer interposed between the anode and the cathode. A hole transport region is provided between the anode and the emitting layer, and an electron transport region is provided between the emitting layer and the cathode. Holes injected from the anode move to the emitting layer via the hole transport region, and electrons injected from the cathode move to the emitting layer via the electron transport region. The holes and electrons recombine in the emitting layer region to generate excitons. Light is generated as the excitons change from an excited state to a ground state. Summary of the Invention [Problem to be solved by the invention]

[0004] The problem to be solved by the present invention is to provide an organometallic compound, an organic light-emitting device including the same, and an electronic device including the organic light-emitting device. [Means for solving the problem]

[0005] According to one aspect, there is provided an organometallic compound represented by the following chemical formula A, which satisfies the following inequality 1: [ka] In the above chemical formula A, M1 is a transition metal, A1 and A2 are independently at least one R10a Substituted or unsubstituted C1-C 60 is a heterocyclic group, B1 and B2 are independently at least one R 10a Substituted or unsubstituted C5-C 60 a carbocyclic group, or at least one R 10a Substituted or unsubstituted C1-C 60 is a heterocyclic group, L1 to L3 are independently a single bond, O, S, Se, N(R 11a ), B(R 11a ), C(R 11a )(R 12a ), or Si(R 11a )(R 12a ) and R 10a , R 11a and R 12a are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60Heteroaryloxy groups, substituted or unsubstituted C1-C 60 a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2); R 10a , R 11a and R 12a two or more of the adjacent C5-C 30 Carbocyclic groups or substituted or unsubstituted C1-C 30 forming a heterocyclic group, The substituted C5-C 30 Carbocyclic groups, substituted C1-C 30 Heterocyclic groups, substituted C1-C 60 Alkyl groups, substituted C2-C 60 Alkenyl groups, substituted C2-C 60 Alkynyl groups, substituted C1-C 60 Alkoxy groups, substituted C3-C 10 Cycloalkyl groups, substituted C1-C 10 Heterocycloalkyl groups, substituted C3-C 10 Cycloalkenyl groups, substituted C2-C 10 Heterocycloalkenyl groups, substituted C6-C 60 Aryl groups, substituted C6-C 60 Aryloxy groups, substituted C6-C 60 Arylthio groups, substituted C1-C 60 Heteroaryl groups, substituted C1-C 60 Heteroaryloxy groups, substituted C1-C 60 At least one of the substituents of the heteroarylthio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused polycyclic group is Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 ), -Ge(Q 11 )(Q 12 )(Q 13 ), -N(Q 14 )(Q 15 ), -B(Q 16 )(Q 17 ), -P(=O)(Q 18 )(Q 19 ), or any combination thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60alkoxy groups; C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 a heteroarylthio group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 ), -Ge(Q 21 )(Q 22 )(Q 23 ), -N(Q 24 )(Q 25 ), -B(Q26 )(Q 27 ), -P(=O)(Q 28 )(Q 29 ), or any combination thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 a heteroaryl group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; or -Si(Q 31 )(Q 32 )(Q 33 ), -Ge(Q 31 )(Q 32 )(Q 33 ), -N(Q 34 )(Q 35 ), -B(Q 36 )(Q 37 ), or -P(=O)(Q 38 )(Q 39 ); and The above Q1 to Q9, Q 11 ~Q 19 , Q 21 ~Q 29 and Q 31 ~Q 39 are each independently 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, or a phosphate group or a salt thereof; C1-C 60 Alkyl group; C2-C 60 Alkenyl group; C2-C 60 Alkynyl group; C1-C 60 Alkoxy group; or deuterium, -F, cyano group, C1-C 60 Alkyl groups, C1-C 60 Alkoxy groups, C3-C 60 carbocyclic group, C1-C 60heterocyclic groups, or any combination thereof, substituted or unsubstituted, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 60 Carbocyclic group, or C1-C 60 a heterocyclic group; <Inequalities 1> LUNTO(A1) <LUNTO(A2) In the above Inequality 1, LUNTO(A1) is the percentage contribution of the A1 ring in the LUNTO (lowest unoccupied natural transition orbital) distribution of the triplet (T1) of the organometallic compound; LUNTO(A2) is the percentage contribution of the A2 ring in the LUNTO distribution of T1 of the organometallic compound; The LUNTO distribution of T1 of the organometallic compound is the LUNTO distribution when excited from the ground state (S0) to the triplet state (T1), calculated by TD-DFT (time-dependent density functional theory).

[0006] In another aspect, there is provided an organic light emitting device comprising the organometallic compound.

[0007] According to yet another aspect, there is provided an electronic device including the organic light emitting device.

[0008] According to yet another aspect, there is provided an organometallic compound represented by the following formula 1: [ka] In the above Chemical Formula 1, M1 is a transition metal, CY2 to CY5 are independent of each other, C5-C 60 Carbocyclic group or C1-C 60 is a heterocyclic group, X6 is C(R6) or N, X7 is C(R7) or N, and X8 is C(R8) or N; X9 is C(R9) or N, and X 10 is C(R 10 ) or N and X 11 is C(R 11 ) or N and X 12 is C(R 12 ) or N, X 13 is C(R 13 ) or N and X 14 is C(R 14 ) or N and X 15 is C(R 15 ) or N and X 16 is C(R 16 ) or N, X 17 is C(R 17 ) or N and X 18 is C(R 18 ) or N and X 19 is C(R 19 ) or N, L1 is a single bond, O, S, Se, N(R 61 ), B(R 61 ), C(R 61 )(R 62 ), or Si(R 61 )(R 62 ) and a1 is 1, 2, 3, 4, or 5, R1~R 20 , R 30 , R 40 , R 50 , R 61 and R 62 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60 a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2); At least one of R1 to R5 and R6 to R 19 At least one of the following is a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl group, or substituted or unsubstituted C1-C 60 an alkoxy group, b50 R 50 At least one of the C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60 a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, or a substituted or unsubstituted monovalent non-aromatic fused polycyclic heterocyclic group, R1~R 20 , R 30 , R 40 , R 50 , R 61 and R 62 two or more of the adjacent C5-C 30 Carbocyclic groups or substituted or unsubstituted C1-C 30 forming a heterocyclic group, b20, b30, b40 and b50 are each independently 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10; The substituted C5-C 30 Carbocyclic groups, substituted C1-C 30 Heterocyclic groups, substituted C1-C 60 Alkyl groups, substituted C2-C 60 Alkenyl groups, substituted C2-C 60 Alkynyl groups, substituted C1-C 60Alkoxy groups, substituted C3-C 10 Cycloalkyl groups, substituted C1-C 10 Heterocycloalkyl groups, substituted C3-C 10 Cycloalkenyl groups, substituted C2-C 10 Heterocycloalkenyl groups, substituted C6-C 60 Aryl groups, substituted C6-C 60 Aryloxy groups, substituted C6-C 60 Arylthio groups, substituted C1-C 60 Heteroaryl groups, substituted C1-C 60 Heteroaryloxy groups, substituted C1-C 60 At least one of the substituents of the heteroarylthio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused polycyclic group is Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 ), -Ge(Q 11 )(Q 12 )(Q 13 ), -N(Q 14 )(Q 15 ), -B(Q 16 )(Q 17 ), -P(=O)(Q 18 )(Q 19 ), or any combination thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 a heteroarylthio group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 ), -Ge(Q 21 )(Q 22 )(Q 23 ), -N(Q 24 )(Q 25 ), -B(Q 26 )(Q 27 ), -P(=O)(Q 28 )(Q 29 ), or any combination thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 a heteroaryl group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; or -Si(Q 31 )(Q 32 )(Q 33 ), -Ge(Q 31 )(Q 32 )(Q 33 ), -N(Q 34 )(Q 35 ), -B(Q 36 )(Q 37 ), or -P(=O)(Q 38 )(Q 39 ); and The above Q1 to Q9, Q 11~Q 19 , Q 21 ~Q 29 and Q 31 ~Q 39 are each independently 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, or a phosphate group or a salt thereof; C1-C 60 Alkyl group; C2-C 60 Alkenyl group; C2-C 60 Alkynyl group; C1-C 60 Alkoxy group; or deuterium, -F, cyano group, C1-C 60 Alkyl groups, C1-C 60 Alkoxy groups, C3-C 60 carbocyclic group, C1-C 60 heterocyclic groups, or any combination thereof, substituted or unsubstituted, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 60 Carbocyclic group, or C1-C 60 a heterocyclic group; [Effects of the Invention]

[0009] The organometallic compounds have excellent luminescence and charge transport properties, and therefore electronic devices, e.g., organic light emitting devices, using the organometallic compounds can have low driving voltage, high efficiency, and / or long life. Therefore, high-quality organic light emitting devices can be realized using the organometallic compounds.

[0010] Furthermore, a high-quality electronic device can be provided that includes the organic light-emitting device. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a cross-sectional view schematically illustrating an organic light emitting device according to an embodiment. [Figure 2]1 is a diagram illustrating energy transitions according to an embodiment. [Figure 3] 1 is a diagram illustrating energy transitions according to an embodiment. [Figure 4] 1 is a diagram illustrating energy transitions according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] The organometallic compound according to one embodiment is represented by the following chemical formula A and satisfies the following inequality 1: [ka] In the above formula A, M1 is a transition metal.

[0013] According to one embodiment, M1 is also beryllium (Be), magnesium (Mg), aluminum (Al), calcium (Ca), titanium (Ti), manganese (Mn), cobalt (Co), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), zirconium (Zr), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), rhenium (Re), platinum (Pt), or gold (Au).

[0014] According to one embodiment, M1 is also Pd, Ag, Re, Pt or Au.

[0015] According to one embodiment, M1 is also Pd or Pt.

[0016] In the formula A, A1 and A2 each independently represent at least one R 10a Substituted or unsubstituted C1-C 60 It is a heterocyclic group.

[0017] According to one embodiment, A1 and A2 independently of each other are selected from at least one R 10a(i) a first ring, (ii) a second ring, (iii) a fused ring in which two or more first rings are fused to each other, or (iv) a fused ring in which one or more first rings and one or more second rings are fused to each other, each substituted or unsubstituted by the first ring is a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a furan group, a thiophene group, a pyrrole group, a silole group, an indene group, a benzofuran group, a benzothiophene group, an indole group, a benzosilole group, an oxazole group, an isoxazole group, an oxadiazole group, an isoxadiazole group, an oxatriazole group, an isoxatriazole group, a thiazole group, an isothiazole group, a thiadiazole group, an isothiadiazole group, a thiatriazole group, an isothiazole group, a pyrazole group, an imidazole group, a triazole group, a tetrazole group, an azasilole group, a diazasilol group, or a triazasilol group; The second ring can also be a cyclopentane group, a cyclopentadiene group, an adamantane group, a norbornene group, a bicyclo[1.1.1]pentane group, a bicyclo[2.1.1]hexane group, a bicyclo[2.2.1]heptane group (norbornane group), a bicyclo[2.2.2]octane group, a cyclohexane group, a cyclohexene group, or a benzene group.

[0018] In the formula A, B1 and B2 each independently represent at least one R 10a Substituted or unsubstituted C5-C 60 a carbocyclic group, or at least one R 10a Substituted or unsubstituted C1-C 60 It is a heterocyclic group.

[0019] According to one embodiment, B1 and B2 independently of each other are selected from the group consisting of at least one R 10a (i) a first ring, (ii) a second ring, (iii) a fused ring in which two or more first rings are fused together, (iv) a fused ring in which two or more second rings are fused together, or (v) a fused ring in which one or more first rings and one or more second rings are fused together, each substituted or unsubstituted by the first ring is a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a furan group, a thiophene group, a pyrrole group, a silole group, an indene group, a benzofuran group, a benzothiophene group, an indole group, a benzosilole group, an oxazole group, an isoxazole group, an oxadiazole group, an isoxadiazole group, an oxatriazole group, an isoxatriazole group, a thiazole group, an isothiazole group, a thiadiazole group, an isothiadiazole group, a thiatriazole group, an isothiazole group, a pyrazole group, an imidazole group, a triazole group, a tetrazole group, an azasilole group, a diazasilol group, or a triazasilol group; The second ring can also be a cyclopentane group, a cyclopentadiene group, an adamantane group, a norbornene group, a bicyclo[1.1.1]pentane group, a bicyclo[2.1.1]hexane group, a bicyclo[2.2.1]heptane group (norbornane group), a bicyclo[2.2.2]octane group, a cyclohexane group, a cyclohexene group, or a benzene group.

[0020] In the chemical formula A, L1 to L3 are each independently a single bond, O, S, Se, N(R 11a ), B(R 11a ), C(R 11a )(R 12a ), or Si(R 11a )(R 12a )

[0021] In the above chemical formula A, a1 to a3 are 1, 2, 3, 4, or 5, independently of one another.

[0022] In the above chemical formula A, R 10a , R 11a and R 12a are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60 a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2); R 10a , R 11a and R 12a two or more of the adjacent C5-C 30 Carbocyclic groups or substituted or unsubstituted C1-C 30 Forms a heterocyclic group.

[0023] According to one embodiment, said ring A1 may contain at least two electron-donating groups.

[0024] According to one embodiment, said ring A2 may contain at least one electron donating group.

[0025] According to one embodiment, the electron donating group is a substituted or unsubstituted C-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60 It may also be a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, or a substituted or unsubstituted monovalent non-aromatic fused polycyclic heterocyclic group.

[0026] <Inequalities 1> LUNTO(A1) <LUNTO(A2) In the above Inequality 1, LUNTO(A1) is the percentage contribution of the A1 ring in the LUNTO (lowest unoccupied natural transition orbital) distribution of the triplet (T1) of the organometallic compound; LUNTO(A2) is the percentage contribution of the A2 ring in the LUNTO distribution of T1 of the organometallic compound; The LUNTO distribution of T1 of the organometallic compound is the LUNTO distribution when excited from the ground state (S0) to the triplet state (T1), calculated by TD-DFT (time-dependent density functional theory).

[0027] According to one embodiment, the triplet state (T1) of said organometallic compound is also a structure optimized by DFT (density functional theory) calculations.

[0028] According to one embodiment, the DFT calculations may be performed based on a molecular structure optimized through the Gaussian 16 program and the B3LYP / 6-31G(d,p) function.

[0029] According to one embodiment, the organometallic compound is first subjected to DFT calculations (B3LYP / 6-31G(d,p)) to optimize the triplet state (T1) structure of the compound, and then the state excited from S0 to T1 is calculated by TD-DFT based on the optimized structure, and the values ​​of LUNTO(A1) and LUNTO(A2) can be calculated.

[0030] According to one embodiment, the LUNTO distribution quantification calculation of the organometallic compound, for example, the calculation of the LUNTO(A1) and LUNTO(A2) values, can be performed using a program such as Multiwfn.

[0031] The organometallic compound according to one embodiment satisfies Inequality 1, and the LUNTO contribution of ring A2 is higher than the LUNTO contribution of ring A1, thereby improving the luminous efficiency.

[0032] According to one embodiment, the organometallic compound can satisfy the following inequality 2: <Inequalities 2> 15 <LUNTO(A1)<28 In the above Inequality 2, The explanation for LUNTO(A1) is the same as that given in this specification.

[0033] According to one embodiment, the organometallic compound can satisfy the following inequality 3: <Inequality 3> 40 <LUNTO(A2)<80 In the above Inequality 3, The explanation for LUNTO(A2) is the same as that given in this specification.

[0034] The organometallic compound according to an embodiment satisfies inequality 2 and / or 3, and the LUNTO contribution of ring A1 and / or the LUNTO contribution of ring A2 satisfy a certain range, thereby improving the luminous efficiency.

[0035] According to one embodiment, the organometallic compound represented by the formula A is also an organometallic compound represented by the following formula 1: [ka]

[0036] According to one embodiment, rings A1, A2, B1, and B2 in the organometallic compound represented by Formula A each correspond to a moiety in Formula 1 as follows: [ka]

[0037] For example, LUNTO(A1) in the formula 1, that is, the percentage of contribution of the ring A1, is [ka] It means the percentage of contribution of the moiety.

[0038] For example, LUNTO(A2) in the formula 1, that is, the percentage of contribution of the ring A2 is [ka] It means the percentage of contribution of the moiety.

[0039] The * and *' respectively indicate bonding sites with adjacent atoms.

[0040] Without being limited by any particular theory, the organometallic compound according to one embodiment satisfies the structure of Formula 1. [ka] The conjugation effect of the moiety is reduced, which reduces the amount of electrons transferred from the excited state of the organometallic compound to the moiety, thereby decreasing LUNTO(A1) and increasing LUNTO(A2), thereby improving luminous efficiency.

[0041] In addition, in one embodiment of the organometallic compound, as described above, the ring A1 includes at least two electron-donating groups and / or the ring A2 includes at least one weak electron-donating group or electron-withdrawing group. In this case, too, LUNTO(A1) decreases and LUNTO(A2) increases, thereby improving luminous efficiency.

[0042] In the above formula 1, M1 is a transition metal.

[0043] The description of M1 is given in this specification.

[0044] In the above Chemical Formula 1, CY2 to CY5 are each independently a C5-C 60 Carbocyclic group or C1-C 60 It is a heterocyclic group.

[0045] According to one embodiment, CY2 to CY5 are each independently (i) a first ring, (ii) a second ring, (iii) a fused ring in which two or more first rings are fused to each other, (iv) a fused ring in which two or more second rings are fused to each other, (v) a fused ring in which one or more first rings and one or more second rings are fused to each other, or (vi) a group represented by Chemical Formula 1A, the first ring is a cyclopentane group, a cyclopentadiene group, a furan group, a thiophene group, a pyrrole group, a silole group, an indene group, a benzofuran group, a benzothiophene group, an indole group, a benzosilole group, an oxazole group, an isoxazole group, an oxadiazole group, an isoxadiazole group, an oxatriazole group, an isoxatriazole group, a thiazole group, an isothiazole group, a thiadiazole group, an isothiadiazole group, a thiatriazole group, an isothiazole group, a pyrazole group, an imidazole group, a triazole group, a tetrazole group, an azasilole group, a diazasilol group, or a triazasilol group; The second ring can also be an adamantane group, a norbornene group, a bicyclo[1.1.1]pentane group, a bicyclo[2.1.1]hexane group, a bicyclo[2.2.1]heptane group (norbornane group), a bicyclo[2.2.2]octane group, a cyclohexane group, a cyclohexene group, a benzene group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, or a triazine group.

[0046] According to one embodiment, CY2 to CY5 are each independently a benzene group, a naphthalene group, an anthracene group, a phenanthrene group, a triphenylene group, a pyrene group, a chrysene group, a 1,2,3,4-tetrahydronaphthalene group, a benzothiophene group, a benzofuran group, an indole group, an indene group, a benzosilole group, a benzoborole group, a benzophosphole group, a benzoselenophene group, a benzogermole group, a dibenzothiophene group, a dibenzofuran group, a carbazole group, a fluorene group, a dibenzosilole group, a dibenzoborole group, a dibenzophosphole group, a dibenzoselenophene group, a dibenzogermole group, a dibenzothiophene-5-oxide group, a 9H-fluoren-9-one group, a dibenzothiophene-5,5-dioxide group, an azabenzothiophene group, an azabenzofuran group, an azaindole group, an azaindene group, an azabenzosil ... azabenzosilole group, azabenzoborole group, azabenzophosphole group, azabenzoselenophene group, azabenzogermole group, azadibenzothiophene group, azadibenzofuran group, azacarbazole group, azafluorene group, azadibenzosilole group, azadibenzoborole group, azadibenzophosphole group, azadibenzoselenophene group, azadibenzogermole group, azadibenzothiophene 5-oxide group, aza- It may also be a 9H-fluoren-9-one group, an azadibenzothiophene 5,5-dioxide group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a quinoxaline group, a quinazoline group, a phenanthroline group, a 5,6,7,8-tetrahydroisoquinoline group, a 5,6,7,8-tetrahydroquinoline group, an adamantane group, a norbornane group, or a norbornene group.

[0047] According to one embodiment, CY2 to CY5 are, independently of one another, a benzene group, a naphthalene group, a phenanthrene group, a furan group, a thiophene group, a pyrrole group, a cyclopentene group, a silole group, a germole group, a benzofuran group, a benzothiophene group, an indole group, an indene group, a benzosilole group, a benzogermole group, a dibenzofuran group, a dibenzothiophene group, a carbazole group, a fluorene group, a dibenzosilole group, a dibenzogermole group, a pyridine group, a pyrimidine group, a pyridazine group, or a pyrazine group.

[0048] In the formula 1, X6 is C(R6) or N, X7 is C(R7) or N, X8 is C(R8) or N, X9 is C(R9) or N, and X 10 is C(R 10 ) or N and X 11 is C(R 11 ) or N and X 12 is C(R 12 ) or N and X 13 is C(R 13 ) or N and X 14 is C(R 14 ) or N and X 15 is C(R 15 ) or N and X 16 is C(R 16 ) or N and X 17 is C(R 17 ) or N and X 18 is C(R 18 ) or N and X 19 is C(R 19 ) or N.

[0049] In the above Chemical Formula 1, L1 is a single bond, O, S, Se, N(R 61 ), B(R 61 ), C(R 61 )(R 62 ), or Si(R 61 )(R 62 )

[0050] In the above Chemical Formula 1, a1 is 1, 2, 3, 4, or 5.

[0051] The description of a1 above is given in this specification.

[0052] In the above Chemical Formula 1, R1 to R 20 , R 30 , R 40 , R 50 , R 61 and R 62are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60 a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic hetero-fused polycyclic group, -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2).

[0053] According to one embodiment, R1 to R 20 , R 30 , R 40 , R 50 , R 61 and R 62 are independent of each other, Hydrogen, deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 an alkoxy group; or It is also a group represented by any one of chemical formulas 9-1 to 9-61, 9-201 to 9-244, 10-1 to 10-154, and 10-201 to 10-350: [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka]

[0054] In the above chemical formulas 9-1 to 9-61, 9-201 to 9-244, 10-1 to 10-154, and 10-201 to 10-350, * represents a bonding site with an adjacent atom, Ph represents a phenyl group, TMS represents a trimethylsilyl group, and TMG represents a trimethylgermyl group.

[0055] According to one embodiment, R1 to R 19 At least two of the C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl group, or substituted or unsubstituted C1-C 60 It is also an alkoxy group.

[0056] According to one embodiment, b 50 R 50 At least one of the following is a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60 It may also be a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, or a substituted or unsubstituted monovalent non-aromatic fused polycyclic heterocyclic group.

[0057] According to one embodiment, at least one of R1 to R5 and R6 to R 19At least one of the following is a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl group, or substituted or unsubstituted C1-C 60 It is also an alkoxy group.

[0058] According to one embodiment, b 50 R 50 At least one of the C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60 It may also be a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, or a substituted or unsubstituted monovalent non-aromatic fused polycyclic heterocyclic group.

[0059] In the above Chemical Formula 1, R1 to R 20 , R 30 , R 40 , R 50 , R 61 and R62 two or more adjacent C5-C 30 Carbocyclic groups or substituted or unsubstituted C1-C 30 A heterocyclic group can be formed.

[0060] In Chemical Formula 1, b20, b30, b40, and b50 are each independently 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10.

[0061] According to one embodiment, b20, b30, b40 and b50 are also 1, 2, 3 or 4, independently of each other.

[0062] As used herein, the substituted C5-C 30 Carbocyclic groups, substituted C1-C 30 Heterocyclic groups, substituted C1-C 60 Alkyl groups, substituted C2-C 60 Alkenyl groups, substituted C2-C 60 Alkynyl groups, substituted C1-C 60 Alkoxy groups, substituted C3-C 10 Cycloalkyl groups, substituted C1-C 10 Heterocycloalkyl groups, substituted C3-C 10 Cycloalkenyl groups, substituted C1-C 10 Heterocycloalkenyl groups, substituted C6-C 60 Aryl groups, substituted C6-C 60 Aryloxy groups, substituted C6-C 60 Arylthio groups, substituted C1-C 60 Heteroaryl groups, substituted monovalent non-aromatic fused polycyclic groups, substituted monovalent non-aromatic fused polycyclic heterocyclic groups, substituted C3-C 10 Cycloalkylene groups, substituted C1-C 10 Heterocycloalkylene groups, substituted C3-C 10 Cycloalkenylene groups, substituted C1-C 10 Heterocycloalkenylene groups, substituted C6-C 60 Arylene groups, substituted C1-C 60The substituents of the heteroarylene group, the substituted divalent non-aromatic fused polycyclic group, and the substituted divalent non-aromatic fused polycyclic heterocyclic group are: Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or salt thereof, sulfonic acid or salt thereof, phosphoric acid or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or salt thereof, sulfonic acid or salt thereof, phosphoric acid or salt thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q 11 )(Q 12 ), -Si(Q 11 )(Q 12 )(Q 13 ), -Ge(Q 11 )(Q 12 )(Q 13 ), -C(=O)(Q 11 ), -S(=O)(Q 11 ), -S(=O)2(Q 11 ), -B(Q 11 )(Q 12 ), -P(Q 11 )(Q 12 ), -P(=O)(Q 11 )(Q 12 ), -P(=S)(Q11 )(Q 12 ), or any combination thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or salt thereof, sulfonic acid or salt thereof, phosphoric acid or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -N(Q 21 )(Q 22 ), -Si(Q 21 )(Q 22 )(Q 23 ), -Ge(Q 21 )(Q 22 )(Q 23 ), -C(=O)(Q 21 ), -S(=O)(Q 21 ), -S(=O)2(Q 21 ), -B(Q 21 )(Q 22 ), -P(Q 21 )(Q 22 ), -P(=O)(Q 21 )(Q 22 ), -P(=S)(Q 21 )(Q 22), or any combination thereof, substituted or unsubstituted, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 a heteroaryl group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; -N(Q 31 )(Q 32 ), -Si(Q 31 )(Q 32 )(Q 33 ), -Ge(Q 31 )(Q 32 )(Q 33 ), -C(=O)(Q 31 ), -S(=O)(Q 31 ), -S(=O)2(Q 31 ), -B(Q 31 )(Q 32 ), -P(Q 31 )(Q 32 ), -P(=O)(Q 31 )(Q 32 ), or -P(Q 31 )(Q 32 );or Any combination of them;

[0063] In this specification, Q1 to Q3, Q 11 ~Q 13 , Q 21 ~Q 23 and Q 31 ~Q 33 are, independently of one another, hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl group; cyano group; nitro group; amidino group; hydrazine group; hydrazone group; carboxylic acid group or salt thereof; sulfonic acid group or salt thereof; phosphate group or salt thereof; deuterium, C1-C 60 Alkyl groups, C6-C 60C1-C substituted or unsubstituted aryl groups, or any combination thereof 60 Alkyl group; C2-C 60 Alkenyl group; C2-C 60 Alkynyl group; C1-C 60 Alkoxy group; C3-C 10 Cycloalkyl groups; C1-C 10 Heterocycloalkyl group; C3-C 10 Cycloalkenyl group; C1-C 10 Heterocycloalkenyl group; deuterium, C1-C 60 Alkyl groups, C6-C 60 C6-C substituted or unsubstituted aryl groups, or any combination thereof 60 Aryl group; C6-C 60 Aryloxy group; C6-C 60 Arylthio group; C1-C 60 It can also be a heteroaryl group; a monovalent non-aromatic fused polycyclic group; or a monovalent non-aromatic fused polycyclic heterocyclic group.

[0064] For example, in this specification, Q1 to Q3, Q 11 ~Q 13 , Q 21 ~Q 23 and Q 31 ~Q 33 are independent of each other, -CH3, -CD3, -CD2H, -CDH2, -CH2CH3, -CH2CD3, -CH2CD2H, -CH2CDH2, -CHDCH3, -CHDCD2H, -CHDCDH2, -CHDCD3, -CD2CD3, -CD2CD2H, or -CD2CDH2; or Deuterium, C1-C 10 n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, phenyl, biphenyl, or naphthyl groups, substituted or unsubstituted with alkyl groups, phenyl groups, or any combination thereof.

[0065] According to one embodiment, the organometallic compound may be represented by the following Formula 11: [ka] In the above Chemical Formula 11, M1, X6~X 19 , L1, a1, and R1 to R5 are the same as those described in this specification, X 21 is C(R 21 ) or N and X 22 is C(R 22 ) or N and X 23 is C(R 23 ) or N, X 31 is C(R 31 ) or N and X 32 is C(R 32 ) or N, X 41 is C(R 41 ) or N and X 42 is C(R 42 ) or N and X 43 is C(R 43 ) or N and X 44 is C(R 44 ) or N, X 51 is C(R 51 ) or N and X 52 is C(R 52 ) or N and X 53 is C(R 53 ) or N and X 54 is C(R 54 ) or N, R 21 ~R 23 The explanation regarding R 20 The same as the explanation for R 31 and R 32 The explanation regarding R 30 The same as the explanation for R 41 ~R 44 The explanation regarding R 40 The same as the explanation for R51 ~R 54 The explanation regarding R 50 The same applies to the explanation for the above.

[0066] According to one embodiment, the organometallic compound may be represented by the following Formula 21: [ka] (Chemical formula 21) In the above Chemical Formula 21, M1, X6~X 19 , L1, a1, and R1 to R5 are the same as those described in this specification, R 21 ~R 23 The explanation regarding R 20 The same as the explanation for R 31 and R 32 The explanation regarding R 30 The same as the explanation for R 41 ~R 44 The explanation regarding R 40 The same as the explanation for R 51 ~R 54 The explanation regarding R 50 The same applies to the explanation for the above.

[0067] According to one embodiment, the organometallic compound is at least one of the following compounds 1-53, but is not limited to them: [ka] [ka] [ka] [ka] [ka]

[0068] According to one embodiment, the organometallic compound may be represented by the following Formula 1: [ka] In the above Chemical Formula 1, M1 is a transition metal, CY2 to CY5 are independent of each other, C5-C 60 Carbocyclic group or C1-C 60 is a heterocyclic group, X6 is C(R6) or N, X7 is C(R7) or N, and X8 is C(R8) or N; X9 is C(R9) or N, and X 10 is C(R 10 ) or N and X 11 is C(R 11 ) or N and X 12 is C(R 12 ) or N, X 13 is C(R 13 ) or N and X 14 is C(R 14 ) or N and X 15 is C(R 15 ) or N and X 16 is C(R 16 ) or N, X 17 is C(R 17 ) or N and X 18 is C(R 18 ) or N and X 19 is C(R 19 ) or N, L1 is a single bond, O, S, Se, N(R 61 ), B(R 61 ), C(R 61 )(R 62 ), or Si(R 61 )(R 62 ) and a1 is 1, 2, 3, 4, or 5, R1~R 20 , R 30 , R 40 , R 50 , R61 and R 62 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60 a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2); At least one of R1 to R5 and R6 to R 19 At least one of the following is a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl group, or substituted or unsubstituted C1-C 60 an alkoxy group, b50 R 50 At least one of the C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60 a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, or a substituted or unsubstituted monovalent non-aromatic fused polycyclic heterocyclic group, R1~R 20 , R 30 , R 40 , R 50 , R 61 and R 62 two or more adjacent C5-C 30 Carbocyclic groups or substituted or unsubstituted C1-C 30 forming a heterocyclic group, b20, b30, b40 and b50 are each independently 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10; The substituted C5-C 30 Carbocyclic groups, substituted C1-C 30 Heterocyclic groups, substituted C1-C 60 Alkyl groups, substituted C2-C 60 Alkenyl groups, substituted C2-C 60 Alkynyl groups, substituted C1-C 60 Alkoxy groups, substituted C3-C 10 Cycloalkyl groups, substituted C1-C 10 Heterocycloalkyl groups, substituted C3-C 10 Cycloalkenyl groups, substituted C2-C 10 Heterocycloalkenyl groups, substituted C6-C 60 Aryl groups, substituted C6-C 60 Aryloxy groups, substituted C6-C 60 Arylthio groups, substituted C1-C 60 Heteroaryl groups, substituted C1-C 60 Heteroaryloxy groups, substituted C1-C 60 At least one of the substituents of the heteroarylthio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused polycyclic group is Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 ), -Ge(Q 11 )(Q 12 )(Q 13 ), -N(Q 14 )(Q 15 ), -B(Q 16 )(Q 17 ), -P(=O)(Q 18 )(Q 19 ), or any combination thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60Heteroaryloxy groups, C1-C 60 a heteroarylthio group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 ), -Ge(Q 21 )(Q 22 )(Q 23 ), -N(Q 24 )(Q 25 ), -B(Q 26 )(Q 27 ), -P(=O)(Q 28 )(Q 29 ), or any combination thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 a heteroaryl group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; or -Si(Q 31 )(Q 32 )(Q 33 ), -Ge(Q 31 )(Q 32 )(Q 33 ), -N(Q 34 )(Q 35 ), -B(Q 36 )(Q 37 ), or -P(=O)(Q 38 )(Q 39 ); and The above Q1 to Q9, Q 11 ~Q 19 , Q 21 ~Q 29 and Q 31 ~Q 39 are each independently 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, or a phosphate group or a salt thereof; C1-C 60 Alkyl group; C2-C 60 Alkenyl group; C2-C 60 Alkynyl group; C1-C 60 Alkoxy group; or deuterium, -F, cyano group, C1-C 60 Alkyl groups, C1-C 60 Alkoxy groups, C3-C 60 carbocyclic group, C1-C 60 heterocyclic groups, or any combination thereof, substituted or unsubstituted, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 60 Carbocyclic group, or C1-C 60 a heterocyclic group;

[0069] M1, CY2 to CY5, X6 to X 20, L1, a1, R1~R 20 , R 30 , R 40 , R 50 , R 61 , R 62 , b20, b30, b40 and b50 are described in this specification.

[0070] The organometallic compound according to one embodiment satisfies the structure represented by Chemical Formula 1, and due to such a structure, the compound has excellent luminescent properties, is suitable for realizing deep blue, and has excellent charge transport properties.

[0071] Without being limited by any particular theory, the organometallic compound contains a rigid polycyclic carbene structure as represented by Chemical Formula 1, which reduces structural changes in the excited state, thereby suppressing non-radiative transitions and regulating intermolecular interactions through a steric hindrance effect. Furthermore, the organometallic compound of Chemical Formula 1 is characterized by (1) at least one of R1 to R5 and R6 to R 19 or (2) 50 R 50 Since the compound contains at least one substituent selected from the group consisting of the above, the luminous efficiency and color purity are improved, and it is easy to adjust the emission wavelength for deep blue light emission. In addition, an organic light emitting device with excellent properties, such as improved life characteristics, can be realized.

[0072] According to one embodiment, the full width at half maximum (FWHM) of the emission peak of the emission spectrum or electroluminescence spectrum of the organometallic compound is 60 nm or less, for example, in the range of 5 nm to 50 nm, 7 nm to 40 nm, or 10 nm to 30 nm.

[0073] Those skilled in the art will recognize how to synthesize the organometallic compounds by referring to the synthesis examples described below.

[0074] The method for confirming the structure of the organometallic compound is not particularly limited. According to one embodiment, the structure of the organometallic compound can be confirmed by a known method (e.g., NMR, LC-MS, etc.).

[0075] [Electronic elements] According to another aspect, an electronic device is provided that includes an organometallic compound.

[0076] According to one embodiment, the electronic device is an organic light emitting device (OLED), an organic photodiode (OPD), or an organic solar cell (OSC).

[0077] [Organic light-emitting element] According to yet another aspect, there is provided an organic light emitting device comprising the organometallic compound.

[0078] According to one embodiment, the organic light-emitting element includes a first electrode, a second electrode, and an organic layer disposed between the first electrode and the second electrode and including an emitting layer, The organic layer may include an organometallic compound represented by Chemical Formula 1.

[0079] According to one embodiment, the light-emitting layer may include the organometallic compound.

[0080] According to one embodiment, the light-emitting layer may include a host and an emitter, and the emitter may include the organometallic compound.

[0081] According to one embodiment, the content of the host in the light-emitting layer is greater than the content of the organometallic compound, based on weight.

[0082] According to one embodiment, the light-emitting layer may further comprise a sensitizer.

[0083] According to one embodiment, the sensitizer comprises a phosphorescent compound, a delayed fluorescent compound, or any combination thereof.

[0084] For detailed descriptions of the aforementioned hosts, emitters, and sensitizers, please refer to those set forth herein.

[0085] The organic light emitting device includes an emission layer containing the organometallic compound as described above, and thus can have a relatively narrow full width at half maximum (FWHM) of the EL spectrum emission peak, excellent efficiency, and lifespan characteristics.

[0086] According to one embodiment, the organometallic compound acts as a dopant (e.g., an emitter or a sensitizer) in the light-emitting layer, and the light-emitting layer may further include a host (i.e., the content of the organometallic compound in the light-emitting layer is less than the content of the host).

[0087] According to one embodiment, the light-emitting layer may emit blue light. For example, the light-emitting layer may emit blue light having a maximum emission wavelength of 400 nm to 490 nm. As another example, the light-emitting layer may emit blue light having a maximum emission wavelength of 430 nm to 480 nm.

[0088] In this specification, "(the light-emitting layer) contains one or more organometallic compounds" can also be interpreted as "(the light-emitting layer) may contain one type of the organometallic compound, or two or more different types of the organometallic compounds."

[0089] For example, the light-emitting layer may contain only Compound 1 as the organometallic compound. In this case, Compound 1 may be present in the light-emitting layer of the organic light-emitting device. Alternatively, the light-emitting layer may contain Compound 1 and Compound 2 as the organometallic compound.

[0090] [Explanation regarding Figure 1] 1 is a schematic cross-sectional view of an organic light emitting device 10 according to an embodiment. Hereinafter, the structure and manufacturing method of the organic light emitting device according to an embodiment will be described with reference to FIG.

[0091] The organic light emitting device 10 of FIG. 1 includes a first electrode 11, a second electrode 19 facing the first electrode 11, and an organic layer 15 disposed between the first electrode 11 and the second electrode 19.

[0092] The organic layer 15 includes an emissive layer, with a hole transport region disposed between the first electrode 11 and the emissive layer, and an electron transport region disposed between the emissive layer and the second electrode 19 .

[0093] A substrate may be further disposed below the first electrode 11 or above the second electrode 19. The substrate may be a substrate used in a typical organic light emitting device, but may also be a glass substrate or a transparent plastic substrate that has excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and water repellency.

[0094] [First electrode 11] The first electrode 11 is formed by depositing a first electrode material on the substrate using, for example, a deposition method or a sputtering method. The first electrode 11 also serves as an anode. The first electrode material is selected from materials having a high work function to facilitate hole injection.

[0095] The first electrode 11 may be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode. To form the first electrode 11 as a transmissive electrode, the first electrode material may be selected from, but is not limited to, indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO), zinc oxide (ZnO), and any combination thereof. Alternatively, to form the first electrode 110 as a semi-transmissive or reflective electrode, the first electrode material may be selected from, but is not limited to, magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), and any combination thereof.

[0096] The first electrode 11 may have a single layer structure or a multi-layer structure including two or more layers.

[0097] [Emitting layer 15] The light-emitting layer 15 may include the organometallic compound.

[0098] [Explanation regarding Figure 2] According to one embodiment, an organometallic compound in the light-emitting layer may be included as an emitter.

[0099] According to one embodiment, the light-emitting layer may further include a host (hereinafter referred to as "host A," which is not the same as the organometallic compound). The host A is understood with reference to the host materials described below, but is not limited thereto.

[0100] The energy transition according to one embodiment will be described below with reference to FIG.

[0101] 25% of singlet excitons are formed in host A in the emitting layer, and the singlet excitons formed in host A are transferred to the organometallic compound through Förster energy transfer (or Förster resonance energy transfer (FRET)). 75% of triplet excitons formed in host A in the emitting layer are transferred to the organometallic compound through Dexter energy transfer. At least a portion of the singlet energy of the organometallic compound is transferred to triplets through intersystem crossing (ISC), allowing the organometallic compound to emit phosphorescence. At least a portion of the triplet energy of the organometallic compound is transferred to singlets through reverse intersystem crossing (RISC), allowing the organometallic compound to emit delayed fluorescence (or thermally activated delayed fluorescence (TADF)).

[0102] According to one embodiment, the proportion of the luminescent components emitted from the organometallic compound among all the luminescent components emitted from the light-emitting layer is 80% or more, for example, 90% or more, For example, the proportion of the luminescent components emitted from the organometallic compound among all the luminescent components emitted from the light-emitting layer is 95% or more.

[0103] Here, the organometallic compound emits phosphorescence or delayed fluorescence, and the host does not emit light.

[0104] According to one embodiment, when the light-emitting layer further includes a host A in addition to the organometallic compound, the content of the organometallic compound is 50 parts by weight or less, for example, 30 parts by weight or less, per 100 parts by weight of the light-emitting layer, and the content of the host A in the light-emitting layer is 50 parts by weight or more, for example, 70 parts by weight or more, per 100 parts by weight of the light-emitting layer, but is not limited thereto.

[0105] [Explanation regarding Figure 3] According to one embodiment, the organometallic compound is used as a sensitizer and the light-emitting layer may further comprise a fluorescent emitter.

[0106] According to one embodiment, the light-emitting layer may further include a host (hereinafter referred to as "host B," which is not the same as the organometallic compound and the fluorescent emitter) and a fluorescent emitter (hereinafter referred to as "fluorescent emitter B," which is not the same as the host B and the organometallic compound). The host B and the fluorescent emitter B are understood with reference to, but are not limited to, the host material and the fluorescent emitter material described below.

[0107] According to one embodiment, the proportion of the luminescent component of the fluorescent emitter B among all the luminescent components emitted from the emitting layer is 80% or more, for example, 90% or more (as another example, 95% or more). For example, the fluorescent emitter B can emit fluorescence. Furthermore, the host and the sensitizer do not emit light.

[0108] The energy transition according to one embodiment will be described below with reference to FIG.

[0109] 75% of triplet excitons formed in host B in the emitting layer are transferred to the organometallic compound through Dexter energy transfer, and 25% of singlet excitons formed in host B are transferred to singlet and triplet states of the organometallic compound, of which at least a portion of the energy transferred to the singlet state of the organometallic compound is transferred to the triplet state via ISC, and then the triplet energy of the organometallic compound is transferred to fluorescent emitter B through FRET. In addition, at least a portion of the triplet energy of the organometallic compound is transferred to the singlet state via RISC and then transferred to fluorescent emitter B.

[0110] As a result, both singlet and triplet excitons generated in the light-emitting layer are transferred to the emitter, resulting in an organic light-emitting device with improved efficiency.Furthermore, an organic light-emitting device with significantly reduced energy loss can be obtained, thereby improving the life characteristics of the organic light-emitting device.

[0111] According to one embodiment, the content of the organometallic compound in the light-emitting layer is selected in the range of 5 wt% to 50 wt%, specifically, in the range of 10 wt% to 30 wt%. When the content is within the above range, effective energy transfer in the light-emitting layer can be achieved, thereby realizing an organic light-emitting device with high efficiency and long life.

[0112] According to one embodiment, the content of the fluorescent emitter B in the light-emitting layer is selected within the range of 0.01 wt % to 15 wt %, specifically within the range of 0.05 wt % to 3 wt %, but is not limited thereto.

[0113] [Explanation regarding Figure 4] According to one embodiment, the organometallic compound is used as a sensitizer, and the light-emitting layer may further comprise a delayed fluorescence emitter.

[0114] According to one embodiment, the light-emitting layer may further include a host (hereinafter referred to as "host C," which is not the same as the organometallic compound and the fluorescent emitter) and a delayed fluorescence emitter (hereinafter referred to as "delayed fluorescence emitter C," which is not the same as the host C and the organometallic compound). The host C and the delayed fluorescence emitter C are understood with reference to the host material and the delayed fluorescence emitter material described below, but are not limited thereto.

[0115] According to one embodiment, the proportion of the luminescent component of the delayed fluorescence emitter among all the luminescent components emitted from the emitting layer is 80% or more, for example, 90% or more (as another example, 95% or more). For example, the delayed fluorescence emitter can emit delayed fluorescence. Furthermore, the host and the sensitizer do not emit light.

[0116] The energy transition according to one embodiment will be described below with reference to FIG.

[0117] 75% of triplet excitons formed in host C in the emitting layer are transferred to the organometallic compound through Dexter energy transfer, and 25% of singlet excitons formed in host C are transferred to singlet and triplet states of the organometallic compound, of which at least a portion of the energy transferred to the singlet state of the organometallic compound is transferred to the triplet state via ISC, and then the triplet energy of the organometallic compound is transferred to delayed fluorescence emitter C through FRET. In addition, at least a portion of the triplet energy of the organometallic compound is transferred to the singlet state via RISC and then transferred to delayed fluorescence emitter C.

[0118] As a result, both singlet and triplet excitons generated in the light-emitting layer are transferred to the emitter, resulting in an organic light-emitting device with improved efficiency.Furthermore, an organic light-emitting device with significantly reduced energy loss can be obtained, thereby improving the life characteristics of the organic light-emitting device.

[0119] According to one embodiment, the content of the organometallic compound in the light-emitting layer is selected in the range of 5 wt% to 50 wt%, specifically, in the range of 10 wt% to 30 wt%. When the content is within the above range, effective energy transfer in the light-emitting layer can be achieved, thereby realizing an organic light-emitting device with high efficiency and long life.

[0120] According to one embodiment, the content of the delayed fluorescence emitter C in the light-emitting layer is selected within the range of 0.01 wt % to 15 wt %, specifically within the range of 0.05 wt % to 3 wt %, but is not limited thereto.

[0121] [Host in the emitting layer] According to one embodiment, the host does not contain metal atoms.

[0122] According to one embodiment, the host may include at least one compound selected from a fluorene-containing compound, a carbazole-containing compound, a dibenzofuran-containing compound, a dibenzothiophene-containing compound, an indenocarbazole-containing compound, an indolocarbazole-containing compound, a benzofurocarbazole-containing compound, a benzothienocarbazole-containing compound, an acridine-containing compound, a dihydroacridine-containing compound, a triindolobenzene-containing compound, a pyridine-containing compound, a pyrimidine-containing compound, a triazine-containing compound, a silicon-containing compound, a cyano group-containing compound, a phosphine oxide-containing compound, a sulfoxide-containing compound, and a sulfonyl-containing compound.

[0123] For example, the host is a compound containing at least one carbazole ring and at least one cyano group, or a phosphine oxide-containing compound.

[0124] According to one embodiment, the host may consist of one type of host. When the host consists of one type of host, the one type of host is selected from the group consisting of a bipolar host, an electron transporting host, and a hole transporting host, which will be described later.

[0125] According to one embodiment, the host may be a mixture of two or more different hosts, for example, the host may include a hole-transporting host, an electron-transporting host, a bipolar host, or a combination thereof.

[0126] According to one embodiment, the host may be a mixture of an electron-transporting host and a hole-transporting host, a mixture of two different electron-transporting hosts, or a mixture of two different hole-transporting hosts. For details regarding the electron-transporting host and the hole-transporting host, see below.

[0127] According to one embodiment, the host may include an electron-transporting host that includes at least one electron-transporting moiety, and a hole-transporting host that does not include an electron-transporting moiety.

[0128] As used herein, the electron transporting moiety is selected from a cyano group, a π-electron deficient nitrogen-containing cyclic group, and a group represented by one of the following formulas:

[0129] <ET-モイエティ> [ka] In the above chemical formula, *, *', and *" each represent a bonding site with any adjacent atom.

[0130] According to one embodiment, the electron transporting host in the light-emitting layer may include at least one of a cyano group and a π-electron deficient nitrogen-containing cyclic group.

[0131] According to one embodiment, the electron transporting host in the light-emitting layer may contain at least one cyano group.

[0132] According to one embodiment, the electron-transporting host in the light-emitting layer may comprise at least one cyano group and at least one π-electron-deficient nitrogen-containing cyclic group.

[0133] According to one embodiment, the hole-transporting host in the light-emitting layer comprises a hole-transporting moiety and does not comprise an electron-transporting moiety.

[0134] As used herein, the hole transporting moiety is a π-electron-rich C3-C 60 The HT-moiety is selected from cyclic groups and groups represented by the formula: <HT-モイエティ> [ka] In the above chemical formula, *, *', *" and *'" each represent a bonding site with any adjacent atom.

[0135] According to one embodiment, the host comprises an electron-transporting host and a hole-transporting host, the electron-transporting host comprising at least one π-electron-deficient, non-nitrogen-containing cyclic group and at least one electron-transporting moiety, and the hole-transporting host comprising at least one π-electron-deficient, non-nitrogen-containing cyclic group and no electron-transporting moiety.

[0136] In the present specification, the term "π-electron deficient nitrogen-containing cyclic group" refers to a cyclic group having at least one *-N=*' moiety, and examples thereof include an imidazole group, a pyrazole group, a thiazole group, an isothiazole group, an oxazole group, an isoxazole group, a pyridine group, a pyrazine group, a pyridazine group, a pyrimidine group, an indazole group, a purine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a phthalazine group, a naphthyridine group, a quinoxaline group, a quinazolidinyl ... a cinnoline group, a phenanthridine group, an acridine group, a phenanthroline group, a phenazine group, a benzimidazole group, an isobenzothiazole group, a benzoxazole group, an isobenzoxazole group, a triazole group, a tetrazole group, an oxadiazole group, a triazine group, a thiadiazole group, an imidazopyridine group, an imidazopyrimidine group, and an azacarbazole group; and a fused ring of two or more of the above π-electron-deficient nitrogen-containing cyclic groups.

[0137] On the other hand, the π-electron deficient nitrogen-free cyclic group is a benzene group, a heptalene group, an indene group, a naphthalene group, an azulene group, an indacene group, an acenaphthylene group, a fluorene group, a spirobifluorene group, a benzofluorene group, a dibenzofluorene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyrene group, a chrysene group, a naphthacene group, a picene group, a perylene group, a pentacene group, a hexacene group, a rubicene group, a cologen group, an ovalene group, a pyrrole group, or an isoindole group. group, an indole group, a furan group, a thiophene group, a benzofuran group, a benzothiophene group, a benzocarbazole group, a dibenzocarbazole group, a dibenzofuran group, a dibenzothiophene group, a dibenzothiophenesulfone group, a carbazole group, a dibenzosilole group, an indenocarbazole group, an indolocarbazole group, a benzofurocarbazole group, a benzothienocarbazole group, and a triindolobenzene group; and fused rings of two or more of the above π-electron deficient nitrogen-free cyclic groups, but are not limited thereto.

[0138] According to one embodiment, when the host is a mixture of an electron-transporting host and a hole-transporting host, the weight ratio of the electron-transporting host to the hole-transporting host is selected from the range of 1:9 to 9:1, for example, 2:8 to 8:2, for example, 4:6 to 6:4, and for example, 5:5. When the weight ratio of the electron-transporting host to the hole-transporting host satisfies the above range, a balance of hole and electron transport into the light-emitting layer can be achieved.

[0139] According to one embodiment, the bipolar host may include at least one electron transporting moiety and at least one hole transporting moiety.

[0140] According to one embodiment, the host comprises a first compound and a second compound; i) the first compound is a hole-transporting host and the second compound is an electron-transporting host; ii) the first compound is an electron-transporting host and the second compound is a hole-transporting host; iii) the first compound and the second compound are each a bipolar host; iv) the first compound is a hole transporting host and the second compound is a bipolar host; v) the first compound is an electron transporting host and the second compound is a bipolar host; vi) the first compound is a bipolar host and the second compound is a hole transporting host; or vii) The first compound is a bipolar host and the second compound is an electron transporting host.

[0141] The host may include at least one of the following: TPBi, TBADN, ADN (also referred to as "DNA"), CBP, CDBP, TCP, mCP, Compound H50, and Compound H51: [ka]

[0142] Alternatively, the host may further include a compound represented by the following formula 301: [ka]

[0143] In the formula 301, Ar 111 and Ar 112 are independent of each other, Phenylene, naphthylene, phenanthrenylene, and pyrenylene groups; and phenylene, naphthylene, phenanthrenylene, and pyrenylene groups substituted with one or more of phenyl, naphthyl, and anthracenyl groups.

[0144] In the formula 301, Ar 113 ~Ar 116 are independent of each other, C1-C 10 alkyl groups, phenyl groups, naphthyl groups, phenanthrenyl groups, and pyrenyl groups; and phenyl, naphthyl, phenanthrenyl, and pyrenyl groups substituted with one or more of phenyl, naphthyl, and anthracenyl groups.

[0145] In the above chemical formula 301, g, h, i, and j are each independently an integer of 0 to 4, for example, 0, 1, or 2.

[0146] In the formula 301, Ar 113 ~Ar 116 are independent of each other, C1-C substituted with one or more phenyl, naphthyl, and anthracenyl groups 10 alkyl groups; phenyl, naphthyl, anthracenyl, pyrenyl, phenanthrenyl, and fluorenyl groups; Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, sulfonic acid or its salt, phosphoric acid or its salt, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 phenyl, naphthyl, anthracenyl, pyrenyl, phenanthrenyl, and fluorenyl groups substituted with one or more of alkoxy, phenyl, naphthyl, anthracenyl, pyrenyl, phenanthrenyl, and fluorenyl groups; and [ka] ; selected from, but not limited to:

[0147] Alternatively, the host may include a compound represented by Formula 302: [ka]

[0148] In the formula 302, Ar 122 ~Ar 125 The detailed description of the Ar 113 The same applies to the explanation for the above.

[0149] In the formula 302, Ar 126 and Ar 127 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60and -C(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2). 126 and Ar 127 are independent of each other, C1-C 10 It is an alkyl group (for example, a methyl group, an ethyl group, or a propyl group).

[0150] In the formula 302, k and l are each independently an integer of 0 to 4. For example, k and l are 0, 1, or 2.

[0151] According to one embodiment, the host may include at least one compound selected from the following compounds H1 to H108 and E1 to E47: [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka]

[0152] According to one embodiment, the host may consist of one compound, for example, the one compound may be selected from the first material (hole-transporting host) and the second material (electron-transporting host) described above.

[0153] According to one embodiment, the host may include two or more compounds, for example, two or more different hole-transporting hosts, two or more different electron-transporting hosts, or a combination of one or more hole-transporting hosts and one or more electron-transporting hosts.

[0154] [Emitter in the light-emitting layer] The emitter is capable of emitting light.

[0155] According to one embodiment, the emitter may include the organometallic compound.

[0156] According to another embodiment, the emitter may be a fluorescent and / or delayed fluorescent emitter, which emits fluorescent and / or delayed fluorescent light, thereby allowing the decay time (T decay (E)) is less than 100 μs.

[0157] T decay (E) is a quartz substrate on which the host and emitter contained in the light-emitting layer are mixed at a weight ratio of 90:10. -7 The values ​​were calculated from the TRPL (Time-Resolved Photoluminescence) spectrum at room temperature for a 40 nm thick film obtained by vacuum co-evaporation at a vacuum level of 1000 torr.

[0158] According to one embodiment, the emitter may include a tetra- or higher carbocyclic group or a tetra- or higher heterocyclic group.

[0159] According to one embodiment, the emitter is also a metal-free organic compound.

[0160] According to one embodiment, the emitter is also a compound represented by any one of the following formulas 51 to 54: [ka] [ka]

[0161] In the chemical formulas 51 to 54, X 51 and X 52 are, independently of each other, N or B, Y 51 is a single bond, O, S, Se, N(R 501 ), B(R 501 ), C(R 501 )(R 502 ), or Si(R 501 )(R 502 ) and Y 52 is a single bond, O, S, Se, N(R 502 ), B(R 502 ), C(R 502 )(R 504 ), or Si(R 502 )(R 504 ) and Y 53 is a single bond, O, S, Se, N(R 505 ), B(R 505 ), C(R 505 )(R 506 ), or Si(R 505 )(R 506 ) and Y 54 is a single bond, O, S, Se, N(R 507 ), B(R 507), C(R 507 )(R 508 ), or Si(R 507 )(R 508 ) and R 51 ~R 65 and R 501 ~R 508 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60 a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2); R 51 ~R 65 and R 501 ~R 508 two or more adjacent C5-C 30 a carbocyclic group or a C1-C2 substituted or unsubstituted with at least one R5 30 forming a heterocyclic group, The substituted C5-C 30 Carbocyclic groups, substituted C1-C 30 Heterocyclic groups, substituted C1-C 60 Alkyl groups, substituted C2-C 60 Alkenyl groups, substituted C2-C 60 Alkynyl groups, substituted C1-C 60 Alkoxy groups, substituted C3-C 10 Cycloalkyl groups, substituted C1-C 10 Heterocycloalkyl groups, substituted C3-C 10 Cycloalkenyl groups, substituted C2-C 10 Heterocycloalkenyl groups, substituted C6-C 60 Aryl groups, substituted C6-C 60 Aryloxy groups, substituted C6-C 60 Arylthio groups, substituted C1-C 60 Heteroaryl groups, substituted C1-C 60 Heteroaryloxy groups, substituted C1-C 60 At least one of the substituents of the heteroarylthio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused polycyclic group is Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 ), -Ge(Q 11 )(Q 12 )(Q 13 ), -N(Q 14 )(Q 15 ), -B(Q 16 )(Q 17 ), -P(=O)(Q 18 )(Q 19 ), or any combination thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60Heteroaryloxy groups, C1-C 60 a heteroarylthio group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 ), -Ge(Q 21 )(Q 22 )(Q 23 ), -N(Q 24 )(Q 25 ), -B(Q 26 )(Q 27 ), -P(=O)(Q 28 )(Q 29 ), or any combination thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C2-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 a heteroaryl group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; or -Si(Q 31 )(Q 32 )(Q 33 ), -Ge(Q 31 )(Q 32 )(Q 33 ), -N(Q 34 )(Q 35 ), -B(Q 36 )(Q 37 ), or -P(=O)(Q 38 )(Q 39 ); and The above Q1 to Q9, Q 11 ~Q 19 , Q 21 ~Q 29 and Q 31 ~Q 39 are each independently 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 phosphate group or a salt thereof, a substituted or unsubstituted C-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C2-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, C1-C 60Heteroaryloxy groups, C1-C 60 It is a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, or a substituted or unsubstituted monovalent non-aromatic fused polycyclic heterocyclic group.

[0162] According to one embodiment, the R 51 ~R 65 and R 501 ~R 508 The explanation regarding is the same as the explanation regarding R1.

[0163] According to one embodiment, the emitter may be selected from fused polycyclic compounds and styryl compounds.

[0164] According to one embodiment, the emitter may include one of a naphthalene-containing core, a fluorene-containing core, a spirobifluorene-containing core, a benzofluorene-containing core, a dibenzofluorene-containing core, a phenanthrene-containing core, an anthracene-containing core, a fluoranthene-containing core, a triphenylene-containing core, a pyrene-containing core, a chrysene-containing core, a picene-containing core, a perylene-containing core, a pentacene-containing core, an indenoanthracene-containing core, a tetracene-containing core, a bisanthracene-containing core, and a core represented by the following chemical formulas 501-1 to 501-21: [ka] [ka]

[0165] Specifically, the emitter is represented by the following chemical formula 501: [ka]

[0166] In the above chemical formula 501, Ar 51represents deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a sulfonic acid group or a salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 511 )(Q 512 )(Q 513 ), -Ge(Q 511 )(Q 512 )(Q 513 ), -C(Q 511 )(Q 512 )(Q 513 ), -B(Q 511 )(Q 512 ), -N(Q 511 )(Q 512 ), -P(Q 511 )(Q 512 ), -C(=O)(Q 511 ), -S(=O)(Q 511 ), -S(=O)2(Q 511 ), -P(=O)(Q 511 )(Q 512 ), -P(=S)(Q 511 )(Q 512), or a naphthalene group, a fluorene group, a spirobifluorene group, a benzofluorene group, a dibenzofluorene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyrene group, a chrysene group, a picene group, a perylene group, a pentacene group, an indenoanthracene group, a tetracene group, a bisanthracene group, or a group represented by the following chemical formulas 501-1 to 501-21, which are substituted or unsubstituted with any combination thereof, [ka] [ka] L 511 ~L 514 are, independently of each other, substituted or unsubstituted C3-C 10 Cycloalkylene groups, substituted or unsubstituted C1-C 10 Heterocycloalkylene groups, substituted or unsubstituted C3-C 10 Cycloalkenylene groups, substituted or unsubstituted C1-C 10 Heterocycloalkenylene group, substituted or unsubstituted C6-C 60 Arylene groups, substituted or unsubstituted C1-C 60 selected from heteroarylene groups, substituted or unsubstituted divalent non-aromatic fused polycyclic groups, and substituted or unsubstituted divalent non-aromatic fused polycyclic heterocyclic groups; a511 to a514 are each independently selected from 0, 1, 2, and 3; R 511 ~R 513 are, independently of each other, substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60is selected from alkylheteroaryl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups, and substituted or unsubstituted monovalent non-aromatic fused polycyclic groups; Q 511 ~Q 513 are, independently of each other, hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C7-C 60 Alkylaryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C2-C 60 Alkylheteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, deuterium, -F, cyano group, C1-C 20 Alkyl groups and C6-C 30 C1-C substituted with at least one aryl group 60 Alkyl groups, as well as deuterium, -F, cyano groups, C1-C 20 Alkyl groups and C6-C 30 C6-C substituted with at least one aryl group 60 aryl groups; n511 and n512 are independently selected from 0, 1, 2, 3, 4, 5 and 6.

[0167] For example, in the above chemical formula 51, the sum of n511 and n512 is 1 or more, but is not limited thereto.

[0168] For example, in the above formula 51, R 511 and R 512 are, independently of one another, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spirobifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazole group, a triazinyl group, a dibenzofuranyl group, and a dibenzothiophenyl group; and Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 20 Alkyl groups, C1-C 20 At least one selected from an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spirobifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group, a dibenzofuranyl group, and a dibenzothiophenyl group. and a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spirobifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group, a dibenzofuranyl group, and a dibenzothiophenyl group, each of which is substituted with at least one of the following:

[0169] In one embodiment, the emitter is selected from the following compounds D1 to D30 and group FD1: [ka] [ka] [ka] <Group FD1> [ka] [ka] [ka] [ka] [ka]

[0170] The maximum emission wavelength of the emission spectrum of the emitter is 400 nm or more and 650 nm or less. For example, the maximum emission wavelength of the emission spectrum of the emitter is 400 nm or more and 550 nm or less, 400 nm or more and 495 nm or less, or 450 nm or more and 495 nm or less, but is not limited thereto. The emitter can emit blue light or green light, specifically blue light, but is not limited thereto. The "maximum emission wavelength" indicates the wavelength at which the emission intensity is maximum and is also called the "peak emission wavelength."

[0171] The content of the emitter in the light emitting layer is selected from the range of 0.01 wt % to 15 wt %, but is not limited thereto.

[0172] The contents of the host, the sensitizer, and the emitter in the light-emitting layer are, but not limited to, the largest content of the host and the smallest content of the emitter.

[0173] The organic light-emitting device can satisfy the following condition 1: <Condition 1> S1(H)>S1(S)≧S1(E) In the above condition 1, S1(H) is the lowest excited singlet energy level of the host; S1(S) is the lowest excited singlet energy level of the sensitizer; S1(E) is the lowest excited singlet energy level of the emitter.

[0174] S1(H), S1(S), and S1(E) are 10 μm thick films of a host, a sensitizer, or an emitter on a quartz substrate, respectively. -7 The values ​​were calculated from the PL spectra obtained for a 40 nm thick film obtained by vacuum co-evaporation at a vacuum of 1000 torr.

[0175] If the condition 1 is satisfied, the emitter can emit light, and an organic light emitting device with improved efficiency can be provided.

[0176] For example, if the condition 1 is satisfied, the light emission ratio from the emitter in the organic light emitting device is 85% or more. In other words, if the above range is satisfied, only the emitter in the organic light emitting device substantially emits light, and the exciplex and the sensitizer do not substantially emit light.

[0177] Singlet and / or triplet excitons formed in the host are transferred to the sensitizer, where they are converted to singlet excitons through reverse intersystem crossing (RISC), and then transferred to the emitter through Förster energy transfer (FRET). Because both the singlet and triplet excitons of the host can be transferred to the emitter, the organic light-emitting device can have significantly improved lifetime and efficiency.

[0178] Meanwhile, the host and the sensitizer can satisfy the following condition 2: <Condition 2> T1(H) ≧ T1(S) In the condition 2, T1(H) is the lowest excited triplet energy level of the host; T1(S) is the lowest excited triplet energy level of the sensitizer.

[0179] [Sensitizer in the light-emitting layer] The sensitizer may include the organometallic compound.

[0180] According to one embodiment, the sensitizer may further comprise a phosphorescent compound.

[0181] According to one embodiment, the phosphorescent compound may include one or more metals.

[0182] According to one embodiment, the phosphorescent compound comprises one or more metals selected from transition metals (M 11 ) and organic ligands (L 11 ), including L 11 and M 11 can form 1, 2, 3 or 4 cyclometallated rings.

[0183] According to one embodiment, the phosphorescent compound may be represented by the following Formula 101: (Chemical formula 101) M 11 (L 11 ) n11 (L 12 ) n12 In the above formula 101, M 11 is a transition metal, L 11 is a ligand represented by any one of the following chemical formulas 1-1 to 1-4, L 12 is a monodentate or bidentate ligand, n11 is 1, n12 is selected from 0, 1 and 2; [ka] In the above chemical formulas 1-1 to 1-4, A1 to A4 are each independently a substituted or unsubstituted C5-C 30 Carbocyclic groups, substituted or unsubstituted C1-C 30 selected from heterocyclic groups and acyclic groups; Y 11 ~Y 14 are, independently of each other, chemical bonds, O, S, N(R 91 ), B(R 91 ), P(R 91 ), or C(R 91 )(R 92 ) and T1 to T4 are independently a single bond, a double bond, or *-N(R 93 )-*', *-B(R 93 )-*', *-P(R 93 )-*', *-C(R 93 )(R 94 )-*', *-Si(R 93 )(R 94 )-*', *-Ge(R 93 )(R 94 )-*', *-S-*', *-Se-*', *-O-*', *-C(=O)-*', *-S(=O)-*', *-S(=O)2-*', *-C(R 93 )=*', *=C(R 93 )-*', *-C(R 93 )=C(R 94 )-*', *-C(=S)-*', and *-C≡C-*'; The substituted C5-C 30 Carbocyclic group substituents, substituted C1-C 30 Substituents of heterocyclic groups and R 91 ~R 94 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, a hydroxyl group, a cyano group, a nitro 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 phosphate group or a salt thereof, a substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 a heteroaryl group, a substituted or unsubstituted monovalent aromatic fused polycyclic group, a substituted or unsubstituted monovalent aromatic heterofused polycyclic group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic heterofused polycyclic group, -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), and -P(=S)(Q1)(Q2), wherein said substituted C5-C 30 Carbocyclic group substituents and substituted C1-C 30 The substituents of the heterocyclic group are not hydrogen, *1, *2, *3 and *4 are M 11 is the binding site for Q1 to Q3 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C60 Aryl groups, C7-C 60 Alkylaryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C2-C 60 Alkylheteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent aromatic condensed polycyclic group, monovalent aromatic heterocondensed polycyclic group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic heterocondensed polycyclic group, deuterium, -F, cyano group, C1-C 60 Alkyl groups and C6-C 60 C1-C substituted with at least one aryl group 60 Alkyl groups, as well as deuterium, -F, cyano groups, C1-C 60 Alkyl groups and C6-C 60 C6-C substituted with at least one aryl group 60 aryl groups.

[0184] According to one embodiment, the transition metal is platinum (Pt), palladium (Pd), gold (Au), iridium (Ir), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb), thulium (Tm), or even rhodium (Rh).

[0185] According to one embodiment, the sensitizer may further comprise a delayed fluorescent compound.

[0186] According to one embodiment, the delayed fluorescent compound may be represented by the following Formula 101 or 102: [ka]

[0187] In the above chemical formulas 101 and 102, A 21 is an acceptor group, D 21is a donor group, m21 is 1, 2 or 3, n21 is 1, 2 or 3, In the chemical formula 101, the sum of n21 and m21 is 5 or less, and in the chemical formula 102, the sum of n21 and m21 is 6 or less; R 201 is hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C7-C 60 Alkylaryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C2-C 60 Alkylheteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryloxy groups, substituted or unsubstituted C1-C 60a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic hetero-fused polycyclic group, -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(═O)(Q1), -S(═O)(Q1), -S(═O)2(Q1), -P(═O)(Q1)(Q2), and -P(═S)(Q1)(Q2); 201 are optionally linked to each other to form substituted or unsubstituted C5-C 30 Carbocyclic groups or substituted or unsubstituted C1-C 30 can form a heterocyclic group, Q1 to Q3 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C7-C 60 Alkylaryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C2-C 60 Alkylheteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent aromatic condensed polycyclic group, monovalent aromatic heterocondensed polycyclic group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic heterocondensed polycyclic group, deuterium, -F, cyano group, C1-C 60 Alkyl groups and C6-C 60 C1-C substituted with at least one aryl group 60 Alkyl groups, as well as deuterium, -F, cyano groups, C1-C60 Alkyl groups and C6-C 60 C6-C substituted with at least one aryl group 60 aryl groups.

[0188] According to one embodiment, in the formulas 101 and 102, A 21 is a substituted or unsubstituted π-electron deficient nitrogen-free cyclic group.

[0189] Specifically, the π-electron deficient nitrogen-free cyclic group may be a benzene group, a heptalene group, an indene group, a naphthalene group, an azulene group, an indacene group, an acenaphthylene group, a fluorene group, a spirobifluorene group, a benzofluorene group, a dibenzofluorene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyrene group, a chrysene group, a naphthacene group, a picene group, a perylene group, a pentacene group, a hexacene group, a rubicene group, a cologen group, an ovalene group, a pyrrole group, an isoindole group, or a cyclohexane group. a fused ring of two or more of the above-mentioned π-electron deficient nitrogen-free cyclic groups;

[0190] For example, in the formulas 101 and 102, D 21 represents -F, a cyano group, or a π-electron deficient nitrogen-containing cyclic group; C1-C substituted with at least one selected from -F and a cyano group 60 an alkyl group, a π-electron-deficient nitrogen-containing cyclic group, and a π-electron-deficient nitrogen-free cyclic group; and Deuterium, C1-C 60a π-electron deficient nitrogen-containing cyclic group substituted with at least one selected from an alkyl group, a π-electron deficient nitrogen-containing cyclic group, and a π-electron deficient nitrogen-free cyclic group.

[0191] Specifically, the π-electron deficient nitrogen-free cyclic group is as described above.

[0192] Specifically, the π-electron deficient nitrogen-containing cyclic group is a cyclic group having at least one *-N=*' moiety, and examples thereof include an imidazole group, a pyrazole group, a thiazole group, an isothiazole group, an oxazole group, an isoxazole group, a pyridine group, a pyrazine group, a pyridazine group, a pyrimidine group, an indazole group, a purine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a phthalazine group, a naphthyridine group, a quinoxaline group, a quinazoline group, and a cinnoline group. group, phenanthridine group, acridine group, phenanthroline group, phenazine group, benzimidazole group, isobenzothiazole group, benzoxazole group, isobenzoxazole group, triazole group, tetrazole group, oxadiazole group, triazine group, thiadiazole group, imidazopyridine group, imidazopyrimidine group, azacarbazole group, and benzimidazole group; and a fused ring of two or more of the above π-electron-deficient nitrogen-containing cyclic groups.

[0193] According to one embodiment, the content of the sensitizer in the organic layer is greater than the content of the emitter. For example, the volume ratio of the sensitizer to the emitter is 30:0.1 to 10:3, or 10:0.1 to 20:5. As another example, the weight ratio of the sensitizer to the emitter is 10:0.1 to 20:5. Meanwhile, the volume ratio of the host to the sensitizer in the organic layer is 60:40 to 95:5, or 70:30 to 90:10. Alternatively, the weight ratio of the host to the sensitizer is selected from the range of 60:40 to 95:5. By satisfying the above content ranges, the organic light emitting device may have improved luminous efficiency and / or life characteristics.

[0194] Figure 1 is a schematic cross-sectional view of an organic light emitting device 10 according to an embodiment of the present invention. The structure and manufacturing method of an organic light emitting device according to an embodiment of the present invention will now be described with reference to Figure 1. The organic light emitting device 10 has a structure in which a first electrode 11, an organic layer 15, and a second electrode 19 are stacked in this order.

[0195] A substrate may be further disposed below the first electrode 11 or above the second electrode 19. The substrate may be a substrate used in a typical organic light emitting device, but may also be a glass substrate or a transparent plastic substrate that has excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and water repellency.

[0196] The first electrode 11 is formed by depositing a first electrode material on the substrate using, for example, evaporation or sputtering. The first electrode 11 also serves as an anode. The first electrode material is selected from materials having a high work function to facilitate hole injection. The first electrode 11 may be a reflective electrode, a semi-transparent electrode, or a transparent electrode. Examples of the first electrode material include indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), and zinc oxide (ZnO). Alternatively, metals such as magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), and magnesium-silver (Mg-Ag) may be used.

[0197] The first electrode 11 may have a single layer structure or a multi-layer structure including two or more layers, for example, but not limited to, a three-layer structure of ITO / Ag / ITO.

[0198] An organic layer 15 is disposed on the first electrode 11 .

[0199] The organic layer 15 includes a hole transport region, an emission layer, and an electron transport region.

[0200] The hole transport region is disposed between the first electrode 11 and the light emitting layer.

[0201] The hole transport region may include a hole injection layer, a hole transport layer, an electron blocking layer, a buffer layer, or any combination thereof.

[0202] The hole transport region may include only a hole injection layer, or may include only a hole transport layer, or may have a structure of a hole injection layer / hole transport layer or a hole injection layer / hole transport layer / electron blocking layer stacked in this order from the first electrode 11.

[0203] When the hole transport region includes a hole injection layer, the hole injection layer (HIL) is formed on the first electrode 11 using various methods such as vacuum deposition, spin coating, casting, and Langmuir-Blodgett (LB) method.

[0204] When forming a hole injection layer by vacuum deposition, the deposition conditions vary depending on the compound used as the hole injection layer material, the structure of the intended hole injection layer, and thermal properties. For example, the deposition temperature is about 100°C to about 500°C, the vacuum degree is about 10 -8 torr ~ approx. 10 -3 The pressure is selected from the range of, but not limited to, torr and the deposition rate is selected from the range of about 0.01 Å / sec to about 100 Å / sec.

[0205] When forming a hole injection layer by spin coating, the coating conditions vary depending on the compound used as the hole injection layer material, the desired structure of the hole injection layer, and the thermal properties. However, the coating speed is typically between about 2,000 rpm and about 5,000 rpm, and the heat treatment temperature for removing the solvent after coating is selected within the range of about 80°C to 200°C, but is not limited thereto.

[0206] The conditions for forming the hole transport layer and the electron blocking layer refer to the conditions for forming the hole injection layer.

[0207] The hole transport region may include at least one of m-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, Spiro-TPD, Spiro-NPB, methylated NPB, TAPC, HMTPD, 4,4′,4″-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / camphorsulfonic acid (PANI / CSA), polyaniline / poly(4-styrenesulfonate) (PANI / PSS), a compound represented by the following chemical formula 201, and a compound represented by the following chemical formula 202: [ka] [ka] In the formula 201, Ar 101 and Ar 102 are independent of each other, a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an acenaphthylene group, a fluorenylene group, a phenalenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylenylene group, a naphthacenylene group, a picenylene group, a perylenylene group, or a pentacenylene group; or Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, sulfonic acid or its salt, phosphoric acid or its salt, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups, C1-C60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an acenaphthylene group, a fluorenylene group, a phenalenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylenylene group, a naphthacenylene group, a picenylene group, a perylenylene group, or a pentacenylene group substituted with a heteroaryl group, a monovalent non-aromatic fused polycyclic group, a monovalent non-aromatic hetero-fused polycyclic group, or any combination thereof.

[0208] In the formula 201, xa and xb are each independently an integer of 0 to 5, or 0, 1, or 2. For example, xa is 1 and xb is 0, but is not limited thereto.

[0209] In the chemical formulas 201 and 202, the R 101 ~R 108 , R 111 ~R 119 and R 121 ~R 124 are independent of each other, Hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, sulfonic acid or its salt, phosphoric acid or its salt, C1-C 10 alkyl groups (e.g., methyl, ethyl, propyl, butyl, pentyl, hexyl, etc.), or C1-C 10 Alkoxy groups (e.g., methoxy, ethoxy, propoxy, butoxy, pentoxy, etc.); C1-C substituted with 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 or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, or any combination thereof 10 Alkyl group or C1-C 10 alkoxy groups; a phenyl group, a naphthyl group, an anthracenyl group, a fluorenyl group, or a pyrenyl group; or Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, sulfonic acid or its salt, phosphoric acid or its salt, C1-C 10 Alkyl groups, C1-C 10 phenyl, naphthyl, anthracenyl, fluorenyl, or pyrenyl groups substituted with alkoxy groups, or any combination thereof;

[0210] In the formula 201, R 109 teeth, a phenyl group, a naphthyl group, an anthracenyl group, or a pyridinyl group; or Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid or its salt, sulfonic acid or its salt, phosphoric acid or its salt, C1-C 20 Alkyl groups, C1-C 20 a phenyl, naphthyl, anthracenyl, or pyridinyl group substituted with an alkoxy group, a phenyl, naphthyl, anthracenyl, or pyridinyl group, or any combination thereof;

[0211] According to one embodiment, the compound represented by formula 201 may be represented by, but not limited to, formula 201A: [ka] In the formula 201A, R101 , R 111 , R 112 and R 109 For a detailed description of this, please refer to the above.

[0212] For example, the compound represented by the chemical formula 201 and the compound represented by the chemical formula 202 include, but are not limited to, the following compounds HT1 to HT20: [ka] [ka] [ka]

[0213] The thickness of the hole transport region is about 100 Å to about 10,000 Å, for example, about 100 Å to about 1,000 Å. When the hole transport region includes at least one layer of a hole injection layer and a hole transport layer, the thickness of the hole injection layer is about 100 Å to about 10,000 Å, for example, about 100 Å to about 1,000 Å, and the thickness of the hole transport layer is about 50 Å to about 2,000 Å, for example, about 100 Å to about 1,500 Å. When the thicknesses of the hole transport region, hole injection layer, and hole transport layer satisfy the above-mentioned ranges, the desired hole transport characteristics can be obtained without a substantial increase in driving voltage.

[0214] In addition to the materials described above, the hole transport region may further include a charge generating material to improve conductivity. The charge generating material may be uniformly or non-uniformly dispersed within the hole transport region.

[0215] The charge-generating material may be, for example, a p-type dopant. The p-type dopant may be one of, but is not limited to, a quinone derivative, a metal oxide, and a cyano group-containing compound. Non-limiting examples of the p-type dopant include, but are not limited to, quinone derivatives such as tetracyanoquinone dimethane (TCNQ) and 2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinone dimethane (F4-TCNQ), metal oxides such as tungsten oxide and molybdenum oxide, and cyano group-containing compounds such as the following compounds HT-D1 and F12. [ka]

[0216] The hole transport region may further include a buffer layer.

[0217] The buffer layer may compensate for the optical resonance distance depending on the wavelength of light emitted from the light emitting layer, thereby increasing efficiency.

[0218] The light-emitting layer (EML) can be formed on the hole transport region using methods such as vacuum deposition, spin coating, casting, and the LB method. When forming the light-emitting layer using vacuum deposition and spin coating, the deposition and coating conditions vary depending on the compound used, but are generally selected within the same range as the conditions for forming the hole injection layer.

[0219] On the other hand, when the hole transport region includes an electron blocking layer, the material of the electron blocking layer can be selected from the materials usable for the hole transport region as described above and the host materials described below, but is not limited thereto. For example, when the hole transport region includes an electron blocking layer, the material of the electron blocking layer can be mCP, which will be described later.

[0220] When the organic light emitting device is a full-color organic light emitting device, the light emitting layer may be patterned into a red light emitting layer, a green light emitting layer, and a blue light emitting layer, or the light emitting layer may have a stacked structure of a red light emitting layer, a green light emitting layer, and / or a blue light emitting layer to emit white light.

[0221] When the light-emitting layer includes a host and a dopant, the content of the dopant is generally selected from the range of about 0.01 to about 15 parts by weight based on about 100 parts by weight of the host, but is not limited thereto.

[0222] The thickness of the light-emitting layer is about 100 Å to about 1,000 Å, for example, about 200 Å to about 600 Å. When the thickness of the light-emitting layer satisfies the above range, excellent light-emitting characteristics can be exhibited without a substantial increase in driving voltage.

[0223] An electron transport region is then placed on top of the light-emitting layer.

[0224] The electron transport region may include a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0225] For example, the electron transport region may have a structure of, but is not limited to, a hole blocking layer / electron transport layer / electron injection layer or an electron transport layer / electron injection layer. The electron transport layer may have a single layer structure or a multilayer structure containing two or more different materials.

[0226] The conditions for forming the hole blocking layer, the electron transport layer, and the electron injection layer in the electron transport region refer to the conditions for forming the hole injection layer.

[0227] When the electron transport region includes a hole-blocking layer, the hole-blocking layer includes, for example, but is not limited to, at least one of BCP, Bphen, and BAlq. [ka]

[0228] The thickness of the hole-blocking layer is about 20 Å to about 1,000 Å, for example, about 30 Å to about 300 Å. When the thickness of the hole-blocking layer satisfies the above range, excellent hole-blocking properties can be obtained without a substantial increase in driving voltage.

[0229] The electron transport layer may further include at least one of BCP, Bphen, Alq3, BAlq, TAZ, and NTAZ. [ka]

[0230] Alternatively, the electron transport layer may contain at least one of the following compounds ET1 to ET25, but is not limited thereto. [ka] [ka] [ka]

[0231] The thickness of the electron transport layer is about 100 Å to about 1,000 Å, for example, about 150 Å to about 500 Å. When the thickness of the electron transport layer satisfies the above range, the required electron transport characteristics can be obtained without a substantial increase in driving voltage.

[0232] The electron transport layer may further include a metal-containing material in addition to the above-mentioned materials.

[0233] The metal-containing substance may include a Li complex, such as the following compound ET-D1 (lithium quinolate (LiQ)) or ET-D2. [ka]

[0234] The electron transport region also includes an electron injection layer (EIL) that facilitates the injection of electrons from the second electrode 19 .

[0235] The electron injection layer may include LiF, NaCl, CsF, Li2O, BaO, or any combination thereof.

[0236] The thickness of the electron injection layer is about 1 Å to about 100 Å, for example, about 3 Å to about 90 Å. When the thickness of the electron injection layer satisfies the above range, the required electron injection characteristics can be obtained without a substantial increase in driving voltage.

[0237] [Second electrode 19] A second electrode 19 is provided on the organic layer 15. The second electrode 19 also serves as a cathode. The second electrode 19 may be formed from a metal, alloy, conductive compound, or combination thereof having a relatively low work function. Specific examples of materials that may be used for forming the second electrode 19 include lithium (Li), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), and magnesium-silver (Mg-Ag). Alternatively, various modifications are possible, such as forming a transmissive second electrode 19 using ITO or IZO to obtain a top-emitting device.

[0238] Although the organic light emitting device has been described above with reference to FIG. 1, it is not limited thereto.

[0239] According to yet another aspect, there is provided an electronic device including the organic light emitting device.

[0240] The electronic device may further include a thin film transistor (TFT) in addition to the organic light emitting device described above. The TFT may include a source electrode, a drain electrode, and an active layer, and one of the source electrode and the drain electrode may be electrically connected to one of the first electrode and the second electrode of the organic light emitting device.

[0241] In yet another aspect, there is provided a diagnostic composition comprising the organometallic compound represented by Formula 1.

[0242] The diagnostic composition may include one or more organometallic compounds represented by Chemical Formula 1.

[0243] The organometallic compound represented by Chemical Formula 1 can provide high luminescence efficiency, and therefore, a diagnostic composition containing the organometallic compound can have high diagnostic efficiency.

[0244] The diagnostic composition can be used in a variety of applications, such as various diagnostic kits, diagnostic reagents, biosensors, and biomarkers.

[0245] As used herein, C1-C 60 The alkyl group means a linear or branched saturated aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, and specific examples include a methyl group, an ethyl group, a propyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, an isoamyl group, and a hexyl group. 60 The alkylene group is one of the C1-C 60 It means a divalent group having the same structure as an alkyl group.

[0246] As used herein, C1-C 60 Alkyl groups, C1-C 20 Alkyl groups and / or C1-C 10Examples of alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, n-hexyl, isohexyl, sec-hexyl, tert-hexyl, n-heptyl, isoheptyl, sec-heptyl, tert-heptyl, n-octyl, isooctyl, sec-octyl, tert-octyl, n-nonyl, isononyl, sec-nonyl, tert-nonyl, n-decyl, isodecyl, sec-decyl, tert-decyl, or any combination thereof. and the like, substituted or unsubstituted, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, n-hexyl, isohexyl, sec-hexyl, tert-hexyl, n-heptyl, isoheptyl, sec-heptyl, tert-heptyl, n-octyl, isooctyl, sec-octyl, tert-octyl, n-nonyl, isononyl, sec-nonyl, tert-nonyl, n-decyl, isodecyl, sec-decyl, or tert-decyl. For example, the above formula 9-33 is a branched C6 alkyl group, which appears to be a tert-butyl group substituted with two methyl groups.

[0247] As used herein, C1-C 60 The alkoxy group is -OA. 101 (where A 101 is the above C1-C 60 Specific examples of the alkoxy group include methoxy, ethoxy, and isopropyloxy groups.

[0248] As used herein, C1-C 60 Alkoxy groups, C1-C 20 Alkoxy group, or C1-C10 Examples of the alkoxy group include a methoxy group, an ethoxy group, a propoxy group, a butoxy group, or a pentoxy group.

[0249] As used herein, C2-C 60 The alkenyl group is the C2-C 60 It has a structure containing one or more carbon-carbon double bonds in the middle or at the end of the alkyl group, and specific examples thereof include ethenyl, propenyl, and butenyl groups. 60 The alkenylene group is the C2-C 60 It means a divalent group having the same structure as an alkenyl group.

[0250] As used herein, C2-C 60 The alkynyl group is the C2-C 60 It has a structure containing one or more carbon-carbon triple bonds in the middle or at the end of the alkyl group, and specific examples thereof include an ethynyl group and a propynyl group. 60 The alkynylene group is the C2-C 60 It means a divalent group having the same structure as an alkynyl group.

[0251] As used herein, C3-C 10 The cycloalkyl group refers to a monovalent saturated hydrocarbon monocyclic group having 3 to 10 carbon atoms, and specific examples thereof include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cycloheptyl group. 10 The cycloalkylene group is the C3-C 10 It means a divalent group having the same structure as a cycloalkyl group.

[0252] As used herein, C3-C 10 Examples of cycloalkyl groups include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantanyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.1]heptyl (norbornanyl), bicyclo[2.2.2]octyl, and the like.

[0253] As used herein, C1-C 10 The heterocycloalkyl group means a monovalent monocyclic group having 1 to 10 carbon atoms and containing at least one heteroatom selected from N, O, P, Si, and S as a ring-forming atom, and specific examples thereof include a tetrahydrofuranyl group, a tetrahydrothiophenyl group, etc. In this specification, C1-C 10 The heterocycloalkylene group is one of the C1-C 10 It means a divalent group having the same structure as a heterocycloalkyl group.

[0254] As used herein, C1-C 10 Examples of heterocycloalkyl groups include silolanyl, silnanyl, tetrahydrofuranyl, tetrahydro-2H-pyranyl, and tetrahydrothiophenyl groups.

[0255] As used herein, C3-C 10 The cycloalkenyl group is a monovalent monocyclic group having 3 to 10 carbon atoms, and has at least one carbon-carbon double bond in the ring, but does not have aromaticity. Specific examples include a cyclopentenyl group, a cyclohexenyl group, and a cycloheptenyl group. 10 The cycloalkenylene group is the C3-C 10 It means a divalent group having the same structure as a cycloalkenyl group.

[0256] As used herein, C2-C 10 The heterocycloalkenyl group is a monovalent monocyclic group having 2 to 10 carbon atoms and containing at least one heteroatom selected from N, O, P, Si, and S as a ring-forming atom, and having at least one double bond in the ring. 10 Specific examples of heterocycloalkenyl groups include a 2,3-dihydrofuranyl group, a 2,3-dihydrothiophenyl group, and the like. 10 The heterocycloalkenylene group is the C2-C 10 It means a divalent group having the same structure as a heterocycloalkenyl group.

[0257] As used herein, C6-C 60 An aryl group means a monovalent group having a carbocyclic aromatic system containing 6 to 60 carbon atoms, C6-C 60 The term "arylene group" refers to a divalent group having a carbocyclic aromatic system with 6 to 60 carbon atoms. 60 Specific examples of the aryl group include a phenyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, and a chrysenyl group. 60 Aryl groups and C6-C 60 When the arylene group contains more than one ring, the two or more rings are fused together.

[0258] As used herein, C7-C 60 The alkylaryl group has at least one C-C 60 C6-C substituted with alkyl groups 60 It means an aryl group.

[0259] As used herein, C1-C 60 The heteroaryl group means a monovalent group having a cyclic aromatic system containing 1 to 60 carbon atoms and containing at least one heteroatom selected from N, O, P, Si, and S as a ring-forming atom, and is C1-C 60 The heteroarylene group refers to a divalent group having a cyclic aromatic system containing 1 to 60 carbon atoms and containing at least one heteroatom selected from N, O, P, and S as a ring-forming atom. 60 Specific examples of the heteroaryl group include a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, and the like. 60 Heteroaryl groups and C1-C 60 When the heteroarylene group contains more than one ring, the two or more rings are fused together.

[0260] As used herein, C2-C 60 The alkylheteroaryl group has at least one C-C 60 C1-C substituted with alkyl groups 60It means a heteroaryl group.

[0261] As used herein, C6-C 60 The aryloxy group is -OA 102 (where A 102 is the above C6-C 60 aryl group), and C6-C 60 The arylthio group is -SA 103 (where A 103 is the above C6-C 60 aryl group).

[0262] As used herein, C1-C 60 The heteroaryloxy group is -OA 104 (where A 104 is the above C1-C 60 heteroaryl group), and C1-C 60 The heteroarylthio group is -SA 105 (where A 105 is the above C1-C 60 Heteroaryl groups are shown.

[0263] In this specification, the term "monovalent non-aromatic fused polycyclic group" refers to a monovalent group (e.g., having 8 to 60 carbon atoms) in which two or more rings are fused together, the ring atoms are carbon only, and the entire molecule is non-aromatic. Specific examples of the monovalent non-aromatic fused polycyclic group include a fluorenyl group. In this specification, the term "divalent non-aromatic fused polycyclic group" refers to a divalent group having the same structure as the monovalent non-aromatic fused polycyclic group.

[0264] As used herein, a monovalent non-aromatic fused heteropolycyclic group refers to a monovalent group (e.g., having 1 to 60 carbon atoms) in which two or more rings are fused together and which contains, in addition to carbon, a heteroatom selected from N, O, P, Si, and S as ring-forming atoms, and the entire molecule is non-aromatic. Examples of the monovalent non-aromatic fused heteropolycyclic group include a carbazolyl group. As used herein, a divalent non-aromatic fused heteropolycyclic group refers to a divalent group having the same structure as the monovalent non-aromatic fused heteropolycyclic group.

[0265] As used herein, C5-C 30 A carbocyclic group refers to a saturated or unsaturated cyclic group having only 5 to 30 carbon atoms as ring-forming atoms. 30 A carbocyclic group is a monocyclic group or a polycyclic group. 1a (substituted or unsubstituted) C5-C 30 A "carbocyclic group" is, for example, a group consisting of at least one R 1a adamantane (substituted or unsubstituted), norbornene, bicyclo[1.1.1]pentane, bicyclo[2.1.1]hexane, bicyclo[2.2.1]heptane (norbornane), bicyclo[2.2.2]octane, cyclopentane, cyclohexane, cyclohexene, benzene, naphthalene, anthracene, phenanthrene, triphenylene, pyrene, chrysene, 1,2,3,4-tetrahydronaphthalene, cyclopentadiene, silole, fluorene, and the like.

[0266] As used herein, C1-C 30 The heterocyclic group refers to a saturated or unsaturated cyclic group having, in addition to 1 to 30 carbon atoms as ring-forming atoms, at least one heteroatom selected from N, O, P, Si, and S. 30 The heterocyclic group is a monocyclic group or a polycyclic group. 1a (substituted or unsubstituted) C1-C 30 The "heterocyclic group" is, for example, (at least one R 1a(substituted or unsubstituted) thiophene, furan, pyrrole, silole, borole, phosphole, selenophene, germole, benzothiophene, benzofuran, indole, indene, benzosilole, benzoborole, benzophosphole, benzoselenophene, benzogermole, dibenzothiophene, dibenzofuran, carbazole, dibenzosilole, dibenzoborole, dibenzophosphole group, dibenzoselenophene group, dibenzogermole group, dibenzothiophene 5-oxide group, 9H-fluoren-9-one group, dibenzothiophene 5,5-dioxide group, azabenzothiophene group, azabenzofuran group, azaindole group, azaindene group, azabenzosilole group, azabenzoborole group, azabenzophosphole group, azabenzoselenophene group, azabenzogermole group, azadibenzothiophene group, azadibenzofuran group, aza Carbazole group, azafluorene group, azadibenzosilole group, azadibenzoborole group, azadibenzophosphole group, azadibenzoselenophene group, azadibenzogermole group, azadibenzothiophene 5-oxide group, aza-9H-fluoren-9-one group, azadibenzothiophene 5,5-dioxide group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, quinoxaline group, quinazoline group , phenanthroline group, pyrazole group, imidazole group, triazole group, oxazole group, isoxazole group, thiazole group, isothiazole group, oxadiazole group, thiadiazole group, benzopyrazole group, benzimidazole group, benzoxazole group, benzothiazole group, benzoxadiazole group, benzothiadiazole group, 5,6,7,8-tetrahydroisoquinoline group, 5,6,7,8-tetrahydroquinoline group, and the like.

[0267] In this specification, TMS refers to *-Si(CH3)3, and TMG refers to *-Ge(CH3)3.

[0268] The substituted C5-C 30 carbocyclic group, C1-C 30 Heterocyclic groups, C1-C 60Alkyl groups, substituted C2-C 60 Alkenyl groups, substituted C2-C 60 Alkynyl groups, substituted C1-C 60 Alkoxy groups, substituted C3-C 10 Cycloalkyl groups, substituted C1-C 10 Heterocycloalkyl groups, substituted C3-C 10 Cycloalkenyl groups, substituted C1-C 10 Heterocycloalkenyl groups, substituted C6-C 60 Aryl groups, substituted C6-C 60 Aryloxy groups, substituted C6-C 60 Arylthio groups, substituted C1-C 60 Heteroaryl groups, substituted C1-C 60 Heteroaryloxy groups, substituted C1-C 60 At least one of the substituents of the heteroarylthio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused polycyclic group is Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 ), -Ge(Q 11 )(Q 12 )(Q 13 ), -N(Q 14 )(Q 15 ), -B(Q 16 )(Q 17 ), -P(=O)(Q 18 )(Q 19 ), or any combination thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, or C1-C 60 alkoxy groups; C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 a heteroarylthio group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; Deuterium, -F, -Cl, -Br, -I, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C60 Alkynyl groups, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 ), -Ge(Q 21 )(Q 22 )(Q 23 ), -N(Q 24 )(Q 25 ), -B(Q 26 )(Q 27 ), -P(=O)(Q 28 )(Q 29 ), or any combination thereof, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl groups, C6-C 60 Aryl groups, C6-C 60 Aryloxy group, C6-C 60 Arylthio groups, C1-C 60 a heteroaryl group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; or -Si(Q 31 )(Q 32 )(Q 33 ), -Ge(Q 31 )(Q 32 )(Q 33 ), -N(Q 34 )(Q 35 ), -B(Q 36 )(Q37 ), or -P(=O)(Q 38 )(Q 39 ); and The above Q1 to Q9, Q 11 ~Q 19 , Q 21 ~Q 29 and Q 31 ~Q 39 are each independently 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 phosphate group or a salt thereof, a substituted or unsubstituted C-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 Alkenyl groups, substituted or unsubstituted C2-C 60 Alkynyl groups, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 Aryl groups, substituted or unsubstituted C6-C 60 Aryloxy groups, substituted or unsubstituted C6-C 60 Arylthio groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, C1-C 60 Heteroaryloxy groups, C1-C 60 It is a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, or a substituted or unsubstituted monovalent non-aromatic fused polycyclic heterocyclic group.

[0269] The compound and organic light-emitting device according to one embodiment of the present invention will be described in more detail below with reference to synthesis examples and examples, but the present invention is not limited to the following synthesis examples and examples. In the synthesis examples below, when the expression "'B' was used instead of 'A'" is used, the amount of "B" used and the amount of "A" used are the same on a molar equivalent basis.

[0270] [Synthesis example] Synthesis Example 1: Synthesis of Compound 1 [ka]

[0271] (1) Synthesis of Compound 1-C Compound 1-A (10.7 g, 32.7 mmol), compound 1-B (15.6 g, 49.1 mmol), Pd2(dba)3 (2.79 g, 3.27 mmol), SPhos (2.50 g, 6.54 mmol), and K2CO3 (5.48 g, 42.5 mmol) were placed in a round-bottom flask and mixed with 1,4-dioxane / HO (100 mL / 25 mL). The mixture was refluxed and stirred at 110 °C for 12 hours. After the reaction was complete, the mixture was cooled to room temperature and then ethyl acetate and saturated aqueous ammonium chloride solution were added. The organic layer was extracted with ethyl acetate, dried over anhydrous MgSO4, and filtered. The filtrate was concentrated and purified by silica gel column chromatography to give 18.2 g (97% yield) of compound 1-C. HPLC-MS: 573.23 [M+H] +

[0272] (2) Synthesis of Compound 1-D Compound 1-C (18.2 g, 31.8 mmol) and K2CO3 (13.2 g, 95.3 mmol) were placed in a round-bottom flask and mixed with DMF (300 mL). The mixture was stirred at 100 °C for 12 hours. After the reaction was completed, the temperature was lowered to room temperature, and ethyl acetate and saturated aqueous ammonium chloride solution were added. The organic layer was extracted with ethyl acetate, dried over anhydrous MgSO4, and filtered. The filtrate was concentrated and purified by silica gel column chromatography to obtain 11.5 g (65% yield) of compound 1-D. HPLC-MS: 553.23 [M+H] +

[0273] (3) Synthesis of Compound 1-E Compound 1-D (11.5 g, 20.8 mmol), Pd / C (10 wt% on carbon, 1.15 g), and ammonium formate (26.2 g, 415 mmol) were placed in a round-bottom flask and mixed with methanol (100 mL). The mixture was refluxed and stirred at 80 °C for 12 hours. After the reaction was completed, the temperature was lowered to room temperature, and ethyl acetate and saturated aqueous ammonium chloride solution were added. The organic layer was extracted with ethyl acetate, dried over anhydrous MgSO4, and filtered. The filtrate was concentrated and purified by silica gel column chromatography to give 9.5 g (87% yield) of compound 1-E. HPLC-MS: 523.25 [M+H] +

[0274] (4) Synthesis of Compound 1-G Compound 1-E (3 g, 5.7 mmol), compound 1-F (3.06 g, 5.7 mmol), Pd2(dba)3 (0.26 g, 0.29 mmol), SPhos (0.23 g, 0.57 mmol), and NaOtBu (1.1 g, 11.5 mmol) were placed in a round-bottom flask and mixed with toluene (100 mL). The mixture was refluxed and stirred at 110 °C for 12 hours. After the reaction was completed, the temperature was cooled to room temperature, and ethyl acetate and saturated aqueous ammonium chloride solution were added. The organic layer was extracted with ethyl acetate, dried over anhydrous MgSO4, and filtered. The filtrate was concentrated and purified by silica gel column chromatography to give 4.8 g (86% yield) of compound 1-G. HPLC-MS: 975.39 [M+H] +

[0275] (5) Synthesis of Compound 1-H Compound 1-G (4.8 g, 4.95 mmol) and p-toluenesulfonic acid (0.085 g, 0.906 mmol) were placed in a round-bottom flask and mixed with triethyl orthoformate (40 mL). The mixture was refluxed and stirred at 80 °C for 12 hours. After the reaction was completed, the temperature was lowered to room temperature, and ethyl acetate and saturated aqueous ammonium chloride solution were added. The organic layer was extracted with ethyl acetate, dried over anhydrous MgSO4, and filtered. The filtrate was concentrated and purified by silica gel column chromatography to obtain 4.8 g (95% yield) of compound 1-H. HPLC-MS: 985.37 [M+H] +

[0276] (6) Synthesis of Compound 1 Compound 1-H (4.85 g, 4.70 mmol), K2PtCl4 (2.15 g, 5.17 mmol), and NaOAc (1.16 g, 14.1 mmol) were placed in a round-bottom flask and mixed with dioxane (80 mL). The mixture was refluxed and stirred at 100 °C for 12 hours. After the reaction was completed, the temperature was lowered to room temperature, and ethyl acetate and saturated aqueous ammonium chloride solution were added. The organic layer was extracted with ethyl acetate, dried over anhydrous MgSO4, and filtered. The filtrate was concentrated and purified by silica gel column chromatography to give 1.6 g (29% yield) of compound 1. HPLC-MS: 1178.42 [M+H] +

[0277] Synthesis Example 2: Synthesis of Compound 2 [ka]

[0278] (1) Synthesis of Compound 2-C Compound 2-C (yield 74%) was synthesized in the same manner as in Synthesis Example 1 for compound 1-C, except that compound 2-B was used instead of compound 1-B. HPLC-MS: 629.33 [M+H] +

[0279] (2) Synthesis of compound 2-D Compound 2-D (yield 64%) was synthesized in the same manner as in Synthesis Example 1 for compound 1-D, except that compound 2-C was used instead of compound 1-C. HPLC-MS: 609.33 [M+H] +

[0280] (3) Synthesis of Compound 2-E Compound 2-E (yield 95%) was synthesized in the same manner as in Synthesis Example 1 for compound 1-E, except that compound 2-D was used instead of compound 1-D. HPLC-MS: 579.35 [M+H] +

[0281] (4) Synthesis of Compound 2-G Compound 2-G (yield 69%) was synthesized in the same manner as in Synthesis Example 1, except that compound 2-G was used instead of compound 1-G and compound 2-F was used instead of compound 1-F. HPLC-MS: 983.52 [M+H] +

[0282] (5) Synthesis of Compound 2-H Compound 2-H (yield 96%) was synthesized in the same manner as in Synthesis Example 1 for compound 1-H, except that compound 2-G was used instead of compound 1-G. HPLC-MS: 993.44 [M+H] +

[0283] (6) Synthesis of Compound 2 Compound 2 (yield 33%) was synthesized in the same manner as in the synthesis of Compound 1 in Synthesis Example 1, except that Compound 2-H was used instead of Compound 1-H. HPLC-MS: 1186.47 [M+H] +

[0284] Synthesis Example 3: Synthesis of Compound 3 [ka] (1) Synthesis of Compound 3-B Compound 3-B (yield 88%) was synthesized in the same manner as in Synthesis Example 1 for compound 1-G, except that compound 2-B was used instead of compound 1-E and compound 3-A was used instead of compound 1-F. HPLC-MS: 955.47 [M+H] +

[0285] (2) Synthesis of Compound 3-C Compound 3-C (yield 93%) was synthesized in the same manner as in Synthesis Example 1 for compound 1-H, except that compound 3-B was used instead of compound 1-G. HPLC-MS: 965.55 [M+H] +

[0286] (3) Synthesis of Compound 3 Compound 3 (yield 37%) was synthesized in the same manner as in the synthesis of Compound 1 in Synthesis Example 1, except that Compound 3-C was used instead of Compound 1-H. HPLC-MS: 1158.43 [M+H] +

[0287] Synthesis Example 4: Synthesis of Compound 4 [ka]

[0288] (1) Synthesis of Compound 4-A Compound 4-A (yield 83%) was synthesized in the same manner as in Synthesis Example 1 for compound 1-G, except that compound 2-B was used instead of compound 1-E. HPLC-MS: 1031.50 [M+H] +

[0289] (2) Synthesis of Compound 4-B Compound 4-B (yield 83%) was synthesized in the same manner as in the synthesis of compound 1-H in Synthesis Example 1, except that compound 4-A was used instead of compound 1-G. HPLC-MS: 1040.55 [M+H] +

[0290] (3) Synthesis of Compound 4 Compound 4 (yield 29%) was synthesized in the same manner as in the synthesis of Compound 1 in Synthesis Example 1, except that Compound 4-B was used instead of Compound 1-H. HPLC-MS: 1234.48 [M+H] +

[0291] [Example] Evaluation example 1: LUNTO contribution calculation For each of compounds 1-4, A, and B, the triplet state (T1) structure was first optimized by DFT calculations (B3LYP / 6-31G(d,p)). The state excited from S0 to T1 was then calculated using TD-DFT based on the optimized structure, and the LUNTO(A1) and LUNTO(A2) values ​​were calculated. The results are shown in Table 1. Here, LUNTO(A1) is the LUNTO contribution of the benzimidazole fused ring moiety of each compound, and LUNTO(A2) is the LUNTO contribution of the pyridine ring moiety of each compound. Multiwfn software was used to calculate the LUNTO contributions.

[0292] Evaluation example 2: Luminescence quantum efficiency (PLQY) evaluation A solution of PMMA in CH2Cl2, 5 wt% CBP, and Compound 1 were mixed, and the resulting mixture was coated on a quartz substrate using a spin coater. The resulting mixture was then heat-treated in an oven at 80°C and cooled to room temperature to prepare a film.

[0293] The PLQY of compound 1 was evaluated using a Hamamatsu Photonics absolute PL quantum yield measurement system equipped with a xenon light source, a monochromator, a photonic multichannel analyzer, and an integrating sphere, and employing PLQY measurement software (Hamamatsu Photonics K.K., Shizuoka, Japan). This was repeated for compounds 2-4, A, and B, and the results are shown in Table 1.

[0294] Example 1 A glass substrate with a 50 nm thick ITO electrode (first electrode, positive electrode) deposited on it was ultrasonically cleaned with distilled water. After ultrasonic treatment with distilled water, the glass substrate was ultrasonically cleaned with isopropyl alcohol, acetone, and methanol in that order. After drying, the glass substrate was transferred to a plasma cleaner. The glass substrate was then cleaned with oxygen plasma for 5 minutes and then transferred to a vacuum laminator.

[0295] Next, compound HT3 was vacuum-deposited on the ITO electrode of the glass substrate to form a 350 nm-thick hole injection layer, compound HT-D1 was vacuum-deposited on the hole injection layer to form a 30 nm-thick hole transport layer, and TAPC was vacuum-deposited on the hole transport layer to form a 10 nm-thick electron blocking layer.

[0296] On the electron blocking layer, Compound H26, Compound E1 (weight ratio of Compound H26 to Compound E1 was 6:4), and Compound 1 (10 wt %) were co-deposited to form a 30 nm thick light-emitting layer.

[0297] A 25 nm thick electron transport layer was formed on the light-emitting layer by vacuum deposition of compound ET3, and then a 0.5 nm thick electron injection layer was formed on the electron transport layer by vacuum deposition of ET-D1(LiQ).A 100 nm thick second electrode (negative electrode) was formed on the electron injection layer by deposition of Al, thereby completing the production of an organic light-emitting device. [ka]

[0298] Examples 2 to 4 and Comparative Examples 1 to 4 Organic light-emitting devices were fabricated in the same manner as in Example 1, except that the compounds listed in Table 1 were used as emitters in the light-emitting layer.

[0299] Evaluation example 3: Characterization of organic light-emitting devices The maximum external quantum efficiency (Max EQE) of the organic light emitting devices fabricated in Examples 1 to 4 and Comparative Examples 1 to 4 was measured and evaluated using a current-voltage meter (Keithley 2400) and a luminance meter (Minolta Cs-1000A). The results are shown in Table 1 below.

[0300] [Table 1]

[0301] [ka]

[0302] It can be seen from Table 1 that the organic light emitting device according to one embodiment has excellent luminous efficiency. In addition, it can be seen that the organic light emitting devices of Examples 1 to 4 have significantly superior luminous efficiency compared to the organic light emitting devices of Comparative Examples 1 to 4. [Explanation of symbols]

[0303] 10 Organic light-emitting device 11 1st electrode 15 Organic layer 19 2nd electrode

Claims

1. Represented by the following chemical formula A: An organometallic compound that satisfies the following inequality 1: 【Chemistry 1】 In the above chemical formula A, M １ is a transition metal, A1 and A2 are each independently at least one R １０ａ substituted or unsubstituted C １ -C ６０ is a heterocyclic group, B1 and B2 are each independently at least one R １０ａ substituted or unsubstituted C ５ -C ６０ a carbocyclic group, or at least one R １０ａ substituted or unsubstituted C １ -C ６０ is a heterocyclic group, L １ ~L ３ are each independently a single bond, O, S, Se, N(R １１ａ ), B(R １１ａ ), C(R １１ａ ) (R １２ａ ), or Si(R １１ａ ) (R １２ａ ) and a1 to a3 are each independently 1, 2, 3, 4, or 5; R １０ａ , R １１ａ and R １２ａ are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C １ -C ６０ alkyl group, substituted or unsubstituted C ２ -C ６０ Alkenyl group, substituted or unsubstituted C ２ -C ６０ Alkynyl group, substituted or unsubstituted C １ -C ６０ Alkoxy group, substituted or unsubstituted C ３ -C １０ Cycloalkyl groups, substituted or unsubstituted C １ -C １０ Heterocycloalkyl groups, substituted or unsubstituted C ３ -C １０ Cycloalkenyl group, substituted or unsubstituted C １ -C １０ heterocycloalkenyl group, substituted or unsubstituted C ６ -C ６０ aryl group, substituted or unsubstituted C ７ -C ６０ alkylaryl groups, substituted or unsubstituted C ６ -C ６０ aryloxy group, substituted or unsubstituted C ６ -C ６０ arylthio group, substituted or unsubstituted C １ -C ６０ Heteroaryl groups, substituted or unsubstituted C ２ -C ６０ alkylheteroaryl groups, substituted or unsubstituted C １ -C ６０ Heteroaryloxy group, substituted or unsubstituted C １ -C ６０ a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —Si(Q １ ) (Q ２ ) (Q ３ ), -Ge(Q １ ) (Q ２ ) (Q ３ ), -C(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 ), or -P(=S)(Q １ ) (Q ２ ) and R １０ａ , R １１ａ and R １２ａ two or more of the adjacent groups may be optionally bonded to each other and be substituted or unsubstituted C ５ -C ３０ a carbocyclic group, or a substituted or unsubstituted C １ -C ３０ forming a heterocyclic group, The substituted C ５ -C ３０ Carbocyclic groups, substituted C １ -C ３０ Heterocyclic groups, substituted C １ -C ６０ Alkyl groups, substituted C ２ -C ６０ Alkenyl groups, substituted C ２ -C ６０ Alkynyl group, substituted C １ -C ６０ Alkoxy groups, substituted C ３ -C １０ Cycloalkyl groups, substituted C １ -C １０ Heterocycloalkyl groups, substituted C ３ -C １０ Cycloalkenyl group, substituted C ２ -C １０ Heterocycloalkenyl groups, substituted C ６ -C ６０ Aryl groups, substituted C ６ -C ６０ Aryloxy groups, substituted C ６ -C ６０ Arylthio groups, substituted C １ -C ６０ Heteroaryl groups, substituted C １ -C ６０ Heteroaryloxy groups, substituted C １ -C ６０ At least one of the heteroarylthio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituent of the substituted monovalent non-aromatic fused polycyclic heterocyclic group is Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ an alkynyl group, or C １ -C ６０ an alkoxy group; Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ Heteroaryl group, C １ -C ６０ Heteroaryloxy group, C １ -C ６０ Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q １１ ) (Q １２ ) (Q １３ ), -Ge(Q １１ ) (Q １２ ) (Q １３ ), -N(Q １４ ) (Q １５ ), -B(Q １６ ) (Q １７ ), -P(=O)(Q １８ ) (Q １９ ), or any combination thereof, １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ an alkynyl group, or C １ -C ６０ an alkoxy group; C ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ Heteroaryl group, C １ -C ６０ Heteroaryloxy group, C １ -C ６０ a heteroarylthio group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ Alkynyl group, C １ -C ６０ Alkoxy group, C ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ Heteroaryl group, C １ -C ６０ Heteroaryloxy group, C １ -C ６０ Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q ２１ ) (Q ２２ ) (Q ２３ ), -Ge(Q ２１ ) (Q ２２ ) (Q ２３ ), -N(Q ２４ ) (Q ２５ ), -B(Q ２６ ) (Q ２７ ), -P(=O)(Q ２８ ) (Q ２９ ), or any combination thereof, ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ a heteroaryl group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; or -Si(Q ３１ ) (Q ３２ ) (Q ３３ ), -Ge(Q ３１ ) (Q ３２ ) (Q ３３ ), -N(Q ３４ ) (Q ３５ ), -B(Q ３６ ) (Q ３７ ), or -P(=O)(Q ３８ ) (Q ３９ ); and Q １ ~Q ９ , Q １１ ~Q １９ , Q ２１ ~Q ２９ and Q ３１ ~Q ３９ are each independently 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, or a phosphate group or a salt thereof; C １ -C ６０ Alkyl group; C ２ -C ６０ Alkenyl group; C ２ -C ６０ Alkynyl group; C １ -C ６０ Alkoxy group; or deuterium, —F, cyano group, C １ -C ６０ Alkyl group, C １ -C ６０ Alkoxy group, C ３ -C ６０ Carbocyclic group, C １ -C ６０ C, substituted or unsubstituted with heterocyclic groups, or any combination thereof １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ Alkynyl group, C １ -C ６０ Alkoxy group, C ３ -C ６０ a carbocyclic group, or C １ -C ６０ a heterocyclic group; <Inequality 1> LUNTO(A1)<LUNTO(A2) In the above Inequality 1, LUNTO (A1) is a compound that reacts with the triplet state (T １ ) the percentage contribution of the ring A1 in the LUNTO (lowest unoccupied natural transition orbital) distribution of LUNTO (A2) is the organometallic compound T １ is the percentage contribution of the ring A2 in the LUNTO distribution of T of the organometallic compound １ The LUNTO distribution of the ground state (S ０ ) to the triplet state (T １ ) is the LUNTO distribution when excited.

2. The organometallic compound of claim 1 , which satisfies the following inequalities 2 and 3: <Inequality 2> 15<LUNTO(A1)<28 <Inequality 3> 40<LUNTO(A2)<80 In the above inequalities 2 and 3, The explanation regarding LUNTO (A1) and LUNTO (A2) is the same as that in claim 1.

3. M １ is beryllium (Be), magnesium (Mg), aluminum (Al), calcium (Ca), titanium (Ti), manganese (Mn), cobalt (Co), copper (Cu), zinc (Zn), gallium (Ga), germanium (Ge), zirconium (Zr), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), rhenium (Re), platinum (Pt), or gold (Au).

4. The ring A1 contains at least two electron-donating groups; 2. The organometallic compound of claim 1, wherein said ring A2 comprises at least one electron-donating group.

5. The organometallic compound according to claim 1 , wherein the organometallic compound is represented by the following chemical formula 1: 【Chemistry 2】 In the above Chemical Formula 1, M １ The explanation regarding a1 is the same as that in claim 1, CY ２ ~CY ５ are, independently of each other, C ５ -C ６０ Carbocyclic group or C １ -C ６０ is a heterocyclic group, Y １ ~ Y ３ are, independently of each other, C or N, X ６ is C(R ６ ) or N, and X ７ is C(R ７ ) or N, and X ８ is C(R ８ ) or N, X ９ is C(R ９ ) or N, and X １０ is C(R １０ ) or N, and X １１ is C(R １１ ) or N, and X １２ is C(R １２ ) or N, X １３ is C(R １３ ) or N, and X １４ is C(R １４ ) or N, and X １５ is C(R １５ ) or N, and X １６ is C(R １６ ) or N, X １７ is C(R １７ ) or N, and X １８ is C(R １８ ) or N, and X １９ is C(R １９ ) or N, L １ is a single bond, O, S, Se, N(R ６１ ), B(R ６１ ), C(R ６１ ) (R ６２ ), or Si(R ６１ ) (R ６２ ) and R １ ~R ２０ , R ３０ , R ４０ , R ５０ , R ６１ and R ６２ are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C １ -C ６０ alkyl group, substituted or unsubstituted C ２ -C ６０ Alkenyl group, substituted or unsubstituted C ２ -C ６０ Alkynyl group, substituted or unsubstituted C １ -C ６０ Alkoxy group, substituted or unsubstituted C ３ -C １０ Cycloalkyl groups, substituted or unsubstituted C １ -C １０ Heterocycloalkyl groups, substituted or unsubstituted C ３ -C １０ Cycloalkenyl group, substituted or unsubstituted C １ -C １０ heterocycloalkenyl group, substituted or unsubstituted C ６ -C ６０ aryl group, substituted or unsubstituted C ７ -C ６０ alkylaryl groups, substituted or unsubstituted C ６ -C ６０ aryloxy group, substituted or unsubstituted C ６ -C ６０ arylthio group, substituted or unsubstituted C １ -C ６０ Heteroaryl groups, substituted or unsubstituted C ２ -C ６０ alkylheteroaryl groups, substituted or unsubstituted C １ -C ６０ Heteroaryloxy group, substituted or unsubstituted C １ -C ６０ a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —Si(Q １ ) (Q ２ ) (Q ３ ), -Ge(Q １ ) (Q ２ ) (Q ３ ), -C(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 ), or -P(=S)(Q １ ) (Q ２ ) and R １ ~R ２０ , R ３０ , R ４０ , R ５０ , R ６１ and R ６２ two or more of the adjacent groups may be optionally bonded to each other and be substituted or unsubstituted C ５ -C ３０ a carbocyclic group, or a substituted or unsubstituted C １ -C ３０ forming a heterocyclic group, b20, b30, b40 and b50 are each independently 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10; The substituted C ５ -C ３０ Carbocyclic groups, substituted C １ -C ３０ Heterocyclic groups, substituted C １ -C ６０ Alkyl groups, substituted C ２ -C ６０ Alkenyl groups, substituted C ２ -C ６０ Alkynyl group, substituted C １ -C ６０ Alkoxy groups, substituted C ３ -C １０ Cycloalkyl groups, substituted C １ -C １０ Heterocycloalkyl groups, substituted C ３ -C １０ Cycloalkenyl group, substituted C ２ -C １０ Heterocycloalkenyl groups, substituted C ６ -C ６０ Aryl groups, substituted C ６ -C ６０ Aryloxy groups, substituted C ６ -C ６０ Arylthio groups, substituted C １ -C ６０ Heteroaryl groups, substituted C １ -C ６０ Heteroaryloxy groups, substituted C １ -C ６０ At least one of the heteroarylthio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituent of the substituted monovalent non-aromatic fused polycyclic heterocyclic group is Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ an alkynyl group, or C １ -C ６０ an alkoxy group; Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ Heteroaryl group, C １ -C ６０ Heteroaryloxy group, C １ -C ６０ Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q １１ ) (Q １２ ) (Q １３ ), -Ge(Q １１ ) (Q １２ ) (Q １３ ), -N(Q １４ ) (Q １５ ), -B(Q １６ ) (Q １７ ), -P(=O)(Q １８ ) (Q １９ ), or any combination thereof, １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ an alkynyl group, or C １ -C ６０ an alkoxy group; C ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ Heteroaryl group, C １ -C ６０ Heteroaryloxy group, C １ -C ６０ a heteroarylthio group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ Alkynyl group, C １ -C ６０ Alkoxy group, C ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ Heteroaryl group, C １ -C ６０ Heteroaryloxy group, C １ -C ６０ Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q ２１ ) (Q ２２ ) (Q ２３ ), -Ge(Q ２１ ) (Q ２２ ) (Q ２３ ), -N(Q ２４ ) (Q ２５ ), -B(Q ２６ ) (Q ２７ ), -P(=O)(Q ２８ ) (Q ２９ ), or any combination thereof, ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ a heteroaryl group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; or -Si(Q ３１ ) (Q ３２ ) (Q ３３ ), -Ge(Q ３１ ) (Q ３２ ) (Q ３３ ), -N(Q ３４ ) (Q ３５ ), -B(Q ３６ ) (Q ３７ ), or -P(=O)(Q ３８ ) (Q ３９ ); and Q １ ~Q ９ , Q １１ ~Q １９ , Q ２１ ~Q ２９ and Q ３１ ~Q ３９ are each independently 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, or a phosphate group or a salt thereof; C １ -C ６０ Alkyl group; C ２ -C ６０ Alkenyl group; C ２ -C ６０ Alkynyl group; C １ -C ６０ Alkoxy group; or deuterium, —F, cyano group, C １ -C ６０ Alkyl group, C １ -C ６０ Alkoxy group, C ３ -C ６０ Carbocyclic group, C １ -C ６０ C, substituted or unsubstituted with heterocyclic groups, or any combination thereof １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ Alkynyl group, C １ -C ６０ Alkoxy group, C ３ -C ６０ a carbocyclic group, or C １ -C ６０ a heterocyclic group;

6. CY ２ ~CY ５ are, independently of one another, a benzene group, a naphthalene group, a phenanthrene group, a furan group, a thiophene group, a pyrrole group, a cyclopentene group, a silole group, a germole group, a benzofuran group, a benzothiophene group, an indole group, an indene group, a benzosilole group, a benzogermole group, a dibenzofuran group, a dibenzothiophene group, a carbazole group, a fluorene group, a dibenzosilole group, a dibenzogermole group, a pyridine group, a pyrimidine group, a pyridazine group, or a pyrazine group.

7. R １ ~R １９ At least two of the C １ -C ６０ alkyl group, substituted or unsubstituted C ２ -C ６０ Alkenyl group, substituted or unsubstituted C ２ -C ６０ an alkynyl group, or a substituted or unsubstituted C １ -C ６０ is an alkoxy group, b 50 R ５０ At least one of the groups is substituted or unsubstituted C １ -C ６０ alkyl group, substituted or unsubstituted C ２ -C ６０ Alkenyl group, substituted or unsubstituted C ２ -C ６０ Alkynyl group, substituted or unsubstituted C １ -C ６０ Alkoxy group, substituted or unsubstituted C ３ -C １０ Cycloalkyl groups, substituted or unsubstituted C １ -C １０ Heterocycloalkyl groups, substituted or unsubstituted C ３ -C １０ Cycloalkenyl group, substituted or unsubstituted C １ -C １０ heterocycloalkenyl group, substituted or unsubstituted C ６ -C ６０ aryl group, substituted or unsubstituted C ７ -C ６０ alkylaryl groups, substituted or unsubstituted C ６ -C ６０ aryloxy group, substituted or unsubstituted C ６ -C ６０ arylthio group, substituted or unsubstituted C １ -C ６０ Heteroaryl groups, substituted or unsubstituted C ２ -C ６０ alkylheteroaryl groups, substituted or unsubstituted C １ -C ６０ Heteroaryloxy group, substituted or unsubstituted C １ -C ６０ 6. The organometallic compound according to claim 5, which is a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, or a substituted or unsubstituted monovalent non-aromatic fused polycyclic heterocyclic group.

8. R １ ~R ２０ , R ３０ , R ４０ , R ５０ , R ６１ and R ６２ are independent of each other, Hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amino group, amidino group, hydrazine group, hydrazone group, carboxylic acid group or salt thereof, sulfonic acid group or salt thereof, phosphate group or salt thereof, -SF ５ , C １ -C ２０ alkyl group, or C １ -C ２０ an alkoxy group; Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C １ -C ２０ Alkyl group, deuterium-containing C １ -C ２０ Alkyl group, fluorinated C １ -C ２０ an alkyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a bicyclo[1.1.1]pentyl group, a bicyclo[2.1.1]hexyl group, a bicyclo[2.2.1]heptyl group (norbornanyl group), a bicyclo[2.2.2]octyl group, (C １ -C ２０ alkyl)cyclopentyl group, (C １ -C ２０ alkyl)cyclohexyl group, (C １ -C ２０ alkyl)cycloheptyl group, (C １ -C ２０ alkyl)cyclooctyl group, (C １ -C ２０ alkyl)adamantanyl group, (C １ -C ２０ alkyl)norbornenyl group, (C １ -C ２０ alkyl)cyclopentenyl group, (C １ -C ２０ alkyl)cyclohexenyl group, (C １ -C ２０ alkyl)cycloheptenyl group, (C １ -C ２０ alkyl)bicyclo[1.1.1]pentyl group, (C １ -C ２０ alkyl)bicyclo[2.1.1]hexyl group, (C １ -C ２０ alkyl)bicyclo[2.2.1]heptyl group, (C １ -C ２０ alkyl)bicyclo[2.2.2]octyl group, siloranyl group, phenyl group, (C １ -C ２０ C substituted with an alkyl)phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a 1,2,3,4-tetrahydronaphthyl group, a pyridinyl group, a pyrimidinyl group, or any combination thereof １ -C ２０ Alkyl group or C １ -C ２０ an alkoxy group; Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C １ -C ２０ Alkyl group, deuterium-containing C １ -C ２０ Alkyl group, fluorinated C １ -C ２０ Alkyl group, C １ -C ２０ an alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a bicyclo[1.1.1]pentyl group, a bicyclo[2.1.1]hexyl group, a bicyclo[2.2.1]heptyl group, a bicyclo[2.2.2]octyl group, (C １ -C ２０ alkyl)cyclopentyl group, (C １ -C ２０ alkyl)cyclohexyl group, (C １ -C ２０ alkyl)cycloheptyl group, (C １ -C ２０ alkyl)cyclooctyl group, (C １ -C ２０ alkyl)adamantanyl group, (C １ -C ２０ alkyl)norbornenyl group, (C １ -C ２０ alkyl)cyclopentenyl group, (C １ -C ２０ alkyl)cyclohexenyl group, (C １ -C ２０ alkyl)cycloheptenyl group, (C １ -C ２０ alkyl)bicyclo[1.1.1]pentyl group, (C １ -C ２０ alkyl)bicyclo[2.1.1]hexyl group, (C １ -C ２０ alkyl)bicyclo[2.2.1]heptyl group, (C １ -C ２０ alkyl)bicyclo[2.2.2]octyl group, siloranyl group, phenyl group, (C １ -C ２０ alkyl)phenyl group, biphenyl group, terphenyl group, naphthyl group, 1,2,3,4-tetrahydronaphthyl group, fluorenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, quinoxalinyl group, quinazolinyl group, cinnolinyl group, carbazolyl group, phenanthrolinyl group, benzimidazolyl group, benzofuranyl group, benzothiophenyl group, isobenzothiazolyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a bicyclo[1.1.1]pentyl group, a bicyclo[2.1.1]hexyl group, a bicyclo[2.2.1]heptyl group, a bicyclo[2.2.2]octyl group, a siloranyl group, a phenyl group, (C １ -C ２０ alkyl)phenyl group, biphenyl group, terphenyl group, naphthyl group, 1,2,3,4-tetrahydronaphthyl group, fluorenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, pyrrolyl group, thiophenyl group, furanyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, isoindolyl group, indolyl group, indazolyl group, purinyl group, quinolinyl group, isoquinolinyl group, benzoxyl a cinnolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthrolinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, an azacarbazolyl group, an azadibenzofuranyl group, or an azadibenzothiophenyl group; or -N(Q １ ) (Q ２ ), -Si(Q ３ ) (Q ４ ) (Q ５ ), -Ge(Q ３ ) (Q ４ ) (Q ５ ), -B(Q ６ ) (Q ７ ), -P(=O)(Q ８ ) (Q ９ ), or -P(Q ８ ) (Q ９ 6. The organometallic compound of claim 5, wherein:

9. The organometallic compound according to claim 5 , wherein the organometallic compound is represented by the following chemical formula 11: 【Transformation 3】 In the above Chemical Formula 11, M １ , X ６ ~X １９ , L １ , a1 and R １ ~R ５ The explanation regarding claim 5 is the same as that regarding claim 5. X ２１ is C(R ２１ ) or N, and X ２２ is C(R ２２ ) or N, and X ２３ is C(R ２３ ) or N, X ３１ is C(R ３１ ) or N, and X ３２ is C(R ３２ ) or N, X ４１ is C(R ４１ ) or N, and X ４２ is C(R ４２ ) or N, and X ４３ is C(R ４３ ) or N, and X ４４ is C(R ４４ ) or N, X ５１ is C(R ５１ ) or N, and X ５２ is C(R ５２ ) or N, and X ５３ is C(R ５３ ) or N, and X ５４ is C(R ５４ ) or N, R ２１ ~R ２３ The explanation regarding R in claim 5 ２０ The same as the explanation for R ３１ and R ３２ The explanation regarding R in claim 5 ３０ The same as the explanation for R ４１ ~R ４４ The explanation regarding R in claim 5 ４０ The same as the explanation for R ５１ ~R ５４ The explanation regarding R in claim 5 ５０ The same applies to the explanation for the above.

10. The organometallic compound according to claim 1, wherein the organometallic compound is any one of the following compounds 1 to 53: 【Chemistry 4】 【Transformation 5】 【Transformation 6】 【Transformation 7】 【Transformation 8】

11. A first electrode; A second electrode; an organic layer interposed between the first electrode and the second electrode, An organic light-emitting device, wherein the organic layer comprises an organometallic compound according to any one of claims 1 to 10.

12. the organic layer includes an emitting layer; The organic light-emitting device of claim 11 , wherein the light-emitting layer comprises the organometallic compound.

13. the light-emitting layer comprises a host and an emitter; The organic light emitting device of claim 11 , wherein the emitter comprises the organometallic compound.

14. the light-emitting layer comprises a host, a sensitizer, and an emitter; The organic light-emitting device of claim 11 , wherein the sensitizer comprises the organometallic compound.

15. 14. The organic light-emitting device of claim 13, wherein the host comprises a hole-transporting host, an electron-transporting host, a bipolar host, or a combination thereof.

16. The organic light emitting device of claim 13 , wherein the emitter is a metal-free organic compound.

17. 15. The organic light-emitting device of claim 14, wherein the host and the sensitizer are substantially non-emissive and the emitter emits light.

18. The triplet state (T １ 14. The organic light-emitting device according to claim 13, wherein the energy level of the element is 2.8 eV or higher.

19. An electronic device comprising the organic light-emitting device of claim 11.

20. An organometallic compound represented by the following chemical formula 1: 【Chemistry 9】 In the above Chemical Formula 1, M １ is a transition metal, CY ２ ~CY ５ are, independently of each other, C ５ -C ６０ Carbocyclic group or C １ -C ６０ is a heterocyclic group, X ６ is C(R ６ ) or N, and X ７ is C(R ７ ) or N, and X ８ is C(R ８ ) or N, X ９ is C(R ９ ) or N, and X １０ is C(R １０ ) or N, and X １１ is C(R １１ ) or N, and X １２ is C(R １２ ) or N, X １３ is C(R １３ ) or N, and X １４ is C(R １４ ) or N, and X １５ is C(R １５ ) or N, and X １６ is C(R １６ ) or N, X １７ is C(R １７ ) or N, and X １８ is C(R １８ ) or N, and X １９ is C(R １９ ) or N, L １ is a single bond, O, S, Se, N(R ６１ ), B(R ６１ ), C(R ６１ ) (R ６２ ), or Si(R ６１ ) (R ６２ ) and a1 is 1, 2, 3, 4, or 5; R １ ~R ２０ , R ３０ , R ４０ , R ５０ , R ６１ and R ６２ are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a substituted or unsubstituted C １ -C ６０ alkyl group, substituted or unsubstituted C ２ -C ６０ Alkenyl group, substituted or unsubstituted C ２ -C ６０ Alkynyl group, substituted or unsubstituted C １ -C ６０ Alkoxy group, substituted or unsubstituted C ３ -C １０ Cycloalkyl groups, substituted or unsubstituted C １ -C １０ Heterocycloalkyl groups, substituted or unsubstituted C ３ -C １０ Cycloalkenyl group, substituted or unsubstituted C １ -C １０ heterocycloalkenyl group, substituted or unsubstituted C ６ -C ６０ aryl group, substituted or unsubstituted C ７ -C ６０ alkylaryl groups, substituted or unsubstituted C ６ -C ６０ aryloxy group, substituted or unsubstituted C ６ -C ６０ arylthio group, substituted or unsubstituted C １ -C ６０ Heteroaryl groups, substituted or unsubstituted C ２ -C ６０ alkylheteroaryl groups, substituted or unsubstituted C １ -C ６０ Heteroaryloxy group, substituted or unsubstituted C １ -C ６０ a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —Si(Q １ ) (Q ２ ) (Q ３ ), -Ge(Q １ ) (Q ２ ) (Q ３ ), -C(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 ), or -P(=S)(Q １ ) (Q ２ ) and R １ ~R ５ and at least one of R ６ ~R １９ At least one of the groups is substituted or unsubstituted C １ -C ６０ alkyl group, substituted or unsubstituted C ２ -C ６０ Alkenyl group, substituted or unsubstituted C ２ -C ６０ an alkynyl group, or a substituted or unsubstituted C １ -C ６０ an alkoxy group, b 50 R ５０ At least one of the C １ -C ６０ alkyl group, substituted or unsubstituted C ２ -C ６０ Alkenyl group, substituted or unsubstituted C ２ -C ６０ Alkynyl group, substituted or unsubstituted C １ -C ６０ Alkoxy group, substituted or unsubstituted C ３ -C １０ Cycloalkyl groups, substituted or unsubstituted C １ -C １０ Heterocycloalkyl groups, substituted or unsubstituted C ３ -C １０ Cycloalkenyl group, substituted or unsubstituted C １ -C １０ heterocycloalkenyl group, substituted or unsubstituted C ６ -C ６０ aryl group, substituted or unsubstituted C ７ -C ６０ alkylaryl groups, substituted or unsubstituted C ６ -C ６０ aryloxy group, substituted or unsubstituted C ６ -C ６０ arylthio group, substituted or unsubstituted C １ -C ６０ Heteroaryl groups, substituted or unsubstituted C ２ -C ６０ alkylheteroaryl groups, substituted or unsubstituted C １ -C ６０ Heteroaryloxy group, substituted or unsubstituted C １ -C ６０ a heteroarylthio group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, or a substituted or unsubstituted monovalent non-aromatic fused polycyclic heterocyclic group, R １ ~R ２０ , R ３０ , R ４０ , R ５０ , R ６１ and R ６２ two or more of the adjacent groups may be optionally bonded to each other and be substituted or unsubstituted C ５ -C ３０ a carbocyclic group, or a substituted or unsubstituted C １ -C ３０ forming a heterocyclic group, b20, b30, b40 and b50 are each independently 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10; The substituted C ５ -C ３０ Carbocyclic groups, substituted C １ -C ３０ Heterocyclic groups, substituted C １ -C ６０ Alkyl groups, substituted C ２ -C ６０ Alkenyl groups, substituted C ２ -C ６０ Alkynyl group, substituted C １ -C ６０ Alkoxy groups, substituted C ３ -C １０ Cycloalkyl groups, substituted C １ -C １０ Heterocycloalkyl groups, substituted C ３ -C １０ Cycloalkenyl group, substituted C ２ -C １０ Heterocycloalkenyl groups, substituted C ６ -C ６０ Aryl groups, substituted C ６ -C ６０ Aryloxy groups, substituted C ６ -C ６０ Arylthio groups, substituted C １ -C ６０ Heteroaryl groups, substituted C １ -C ６０ Heteroaryloxy groups, substituted C １ -C ６０ At least one of the heteroarylthio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituent of the substituted monovalent non-aromatic fused polycyclic heterocyclic group is Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ an alkynyl group, or C １ -C ６０ an alkoxy group; Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ Heteroaryl group, C １ -C ６０ Heteroaryloxy group, C １ -C ６０ Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q １１ ) (Q １２ ) (Q １３ ), -Ge(Q １１ ) (Q １２ ) (Q １３ ), -N(Q １４ ) (Q １５ ), -B(Q １６ ) (Q １７ ), -P(=O)(Q １８ ) (Q １９ ), or any combination thereof, １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ an alkynyl group, or C １ -C ６０ an alkoxy group; C ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ Heteroaryl group, C １ -C ６０ Heteroaryloxy group, C １ -C ６０ a heteroarylthio group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; Deuterium, -F, -Cl, -Br, -I, -CD ３ , -CD ２ H, -CDH ２ , -CF ３ , -CF ２ H, -CFH ２ , 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 phosphate group or a salt thereof, C １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ Alkynyl group, C １ -C ６０ Alkoxy group, C ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ Heteroaryl group, C １ -C ６０ Heteroaryloxy group, C １ -C ６０ Heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q ２１ ) (Q ２２ ) (Q ２３ ), -Ge(Q ２１ ) (Q ２２ ) (Q ２３ ), -N(Q ２４ ) (Q ２５ ), -B(Q ２６ ) (Q ２７ ), -P(=O)(Q ２８ ) (Q ２９ ), or any combination thereof, ３ -C １０ Cycloalkyl group, C １ -C １０ Heterocycloalkyl group, C ３ -C １０ Cycloalkenyl group, C ２ -C １０ Heterocycloalkenyl group, C ６ -C ６０ Aryl group, C ６ -C ６０ Aryloxy group, C ６ -C ６０ Arylthio group, C １ -C ６０ a heteroaryl group, a monovalent non-aromatic fused polycyclic group, or a monovalent non-aromatic fused heteropolycyclic group; or -Si(Q ３１ ) (Q ３２ ) (Q ３３ ), -Ge(Q ３１ ) (Q ３２ ) (Q ３３ ), -N(Q ３４ ) (Q ３５ ), -B(Q ３６ ) (Q ３７ ), or -P(=O)(Q ３８ ) (Q ３９ ); and Q １ ~Q ９ , Q １１ ~Q １９ , Q ２１ ~Q ２９ and Q ３１ ~Q ３９ are each independently 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, or a phosphate group or a salt thereof; C １ -C ６０ Alkyl group; C ２ -C ６０ Alkenyl group; C ２ -C ６０ Alkynyl group; C １ -C ６０ Alkoxy group; or deuterium, —F, cyano group, C １ -C ６０ Alkyl group, C １ -C ６０ Alkoxy group, C ３ -C ６０ Carbocyclic group, C １ -C ６０ C, substituted or unsubstituted with heterocyclic groups, or any combination thereof １ -C ６０ Alkyl group, C ２ -C ６０ Alkenyl group, C ２ -C ６０ Alkynyl group, C １ -C ６０ Alkoxy group, C ３ -C ６０ a carbocyclic group, or C １ -C ６０ a heterocyclic group;

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