CN-122029975-A - Composition for organic light emitting device and organic light emitting device including the same

CN122029975ACN 122029975 ACN122029975 ACN 122029975ACN-122029975-A

Abstract

The present specification provides a composition for an organic light emitting device and an organic light emitting device including the composition for an organic light emitting device.

Inventors

LI LV
Mou Jundui
JIN DONGJUN
Cui Dahe

Assignees

LT素材株式会社

Dates

Publication Date: 20260512
Application Date: 20231121
Priority Date: 20231012

Claims (15)

1. A composition for an organic light emitting device, comprising a heterocyclic compound represented by the following chemical formula a, a heterocyclic compound represented by the following chemical formula B, and a heterocyclic compound represented by the following chemical formula C: [ chemical formula A ] In the chemical formula a, the amino acid sequence of the formula a, X is O or S, and the X is O or S, L1 and L2 are each independently of the other a direct bond, a substituted or unsubstituted C6-C60 arylene group, or a substituted or unsubstituted C2-C60 heteroarylene group, L1 and l2 are each independently an integer of 1 to 3, and when l1 or l2 is 2 or more, substituents in brackets are different from each other, Ar1 to Ar3 are each independently a substituted or unsubstituted C6-C60 aryl group, or a substituted or unsubstituted C2-C60 heteroaryl group, R1 to R3 are each independently hydrogen, deuterium, halogen radicals, cyano, substituted or unsubstituted C1-C60 alkyl, substituted or unsubstituted C3-C60 cycloalkyl, substituted or unsubstituted C2-C60 heterocycloalkyl, substituted or unsubstituted C6-C60 aryl, or substituted or unsubstituted C2-C60 heteroaryl, and R1 is an integer of 1 to 4, r2 is an integer of 0 to 4, and r3 is an integer of 1 to 4, provided that r1+r2+r3 is 8, and when each of r1, r2 and r3 is 2 or more, substituents in brackets are the same or different from each other, [ Chemical formula B ] In the chemical formula B, the amino acid sequence of the formula, Y is O or S, and the total number of the catalyst is O or S, Cy1 is a substituted or unsubstituted benzene ring, or a substituted or unsubstituted naphthalene ring, L3 and L4 are each independently of the other a direct bond, a substituted or unsubstituted C6-C60 arylene group, or a substituted or unsubstituted C2-C60 heteroarylene group, L3 and l4 are each independently an integer of 1 to 3, and when l3 or l4 is 2 or more, substituents in brackets are the same or different, One of R4 and R5 is a substituted or unsubstituted heteroaryl group containing a c=n bond, and the other of R4 and R5 is a substituted or unsubstituted carbazolyl group or a substituted or unsubstituted amine group, R6 and R7 are each independently hydrogen, deuterium, halogen radicals, cyano, substituted or unsubstituted C1-C60 alkyl, substituted or unsubstituted C3-C60 cycloalkyl, substituted or unsubstituted C2-C60 heterocycloalkyl, substituted or unsubstituted C6-C60 aryl, or substituted or unsubstituted C2-C60 heteroaryl, and R6 is an integer of 1 to 4 and r7 is an integer of 1 to 6, and when r6 or r7 is 2 or more, substituents in brackets are the same or different, [ Chemical formula C ] In the chemical formula C, the amino acid sequence of the formula C, Z is O or S, and the Z is O or S, One of R21 to R28 is a substituted or unsubstituted heteroaryl group containing a c=n bond, and The remainder of R21 to R28 are each independently hydrogen, deuterium, a halogen group, cyano, substituted or unsubstituted C1-C60 alkyl, substituted or unsubstituted C3-C60 cycloalkyl, substituted or unsubstituted C2-C60 heterocycloalkyl, substituted or unsubstituted C6-C60 aryl, or substituted or unsubstituted C2-C60 heteroaryl.
2. The composition for an organic light-emitting device according to claim 1, Wherein the chemical formula a is represented by any one of the following chemical formulas a-1 to a-5: [ formula A-1] [ Formula A-2] [ Formula A-3] [ Formula A-4] [ Chemical formula A-5] In the chemical formulas A-1 to A-5, X, R1, R2, R3, L1, L2, ar1, ar2, ar3, L1, L2, R1, R2 and R3 are as defined in formula A above.
3. The composition for an organic light-emitting device according to claim 1, Wherein Ar1 to Ar3 are each independently a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted dibenzofuranyl group, or a substituted or unsubstituted dibenzothienyl group.
4. The composition for an organic light-emitting device according to claim 1, Wherein the chemical formula B is represented by any one of the following chemical formulas B-1 to B-10: [ chemical formula B-1] [ Chemical formula B-2] [ Chemical formula B-3] [ Chemical formula B-4] [ Chemical formula B-5] [ Chemical formula B-6] [ Chemical formula B-7] [ Chemical formula B-8] [ Chemical formula B-9] [ Chemical formula B-10] In the chemical formulas B-1 to B-10, Y, L3, L4, R6, R7, L3, L4, R6 and R7 are as defined above in formula B, and R5 is a substituted or unsubstituted carbazolyl group or a substituted or unsubstituted amino group, R8 is hydrogen, deuterium, a halogen group, cyano, substituted or unsubstituted C1 to C60 alkyl, substituted or unsubstituted C3 to C60 cycloalkyl, substituted or unsubstituted C2 to C60 heterocycloalkyl, substituted or unsubstituted C6 to C60 aryl, or substituted or unsubstituted C2 to C60 heteroaryl, R8 is an integer of 0 to 4, and when r8 is 2 or more, substituents in brackets are the same or different from each other, N-Het1 is represented by the following structural formula 1, [ Structure 1] In the case of the structure 1, the number of the components, Represents the site of attachment to another structure, Y1 to Y5 are each independently CRa or N, provided that at least one of Y1 to Y5 is N, and Ra is a substituted or unsubstituted C6 to C60 aryl group, or a substituted or unsubstituted C2 to C60 heteroaryl group, or two or more adjacent Ra groups are bonded to each other to form a ring.
5. The composition for an organic light-emitting device according to claim 1, Wherein one of R4 and R5 is a substituted or unsubstituted heteroaryl group comprising a C=N bond, and the other of R4 and R5 is a substituted or unsubstituted benzocarbazolyl group, a substituted or unsubstituted dibenzocarbazolyl group, or a substituted or unsubstituted C6 to C60 aryl group or a substituted or unsubstituted C2 to C60 heteroaryl substituted amine group.
6. The composition for an organic light-emitting device according to claim 1, Wherein chemical formula C is represented by any one of the following chemical formulas C-1 to C-3: [ chemical formula C-1] [ Chemical formula C-2] [ Chemical formula C-3] In the chemical formulas C-1 to C-3, Z is as defined above for formula C, L5 and L6 are each independently a direct bond, a substituted or unsubstituted C6 to C60 arylene group, or a substituted or unsubstituted C2 to C60 heteroarylene group, R29 is a substituted or unsubstituted C6 to C60 aryl or a substituted or unsubstituted C2 to C60 heteroaryl, R30 and R31 are each independently hydrogen or deuterium, R30 is an integer of 0 to 3, and when r30 is 2 or more, substituents in brackets are the same or different from each other, R31 is an integer of 0 to 4, and when r31 is 2 or more, substituents in brackets are the same or different from each other, L5 and l6 are each independently an integer of 1 to 3, and when l5 and l6 are each 2 or more, substituents in brackets are the same or different from each other, N-Het2 is represented by the following structural formula 2, [ Structure 2] In the case of the structure 2, the number of the components, Represents the site of attachment to another structure, Y6 to Y10 are each independently CRb or N, provided that at least one of Y6 to Y10 is N, and Rb is a substituted or unsubstituted C6 to C60 aryl, or a substituted or unsubstituted C2 to C60 heteroaryl, or two or more adjacent Rb groups are bonded to each other to form a ring.
7. The composition for an organic light-emitting device according to claim 6, Wherein R29 is hydrogen, deuterium, substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted phenanthryl, substituted or unsubstituted triphenylene, substituted or unsubstituted phosphine oxide, substituted or unsubstituted silyl, substituted or unsubstituted dibenzofuranyl, or substituted or unsubstituted dibenzothiophenyl.
8. The composition for an organic light-emitting device according to claim 1, Wherein formula a includes any one of the following compounds: 。
9. The composition for an organic light-emitting device according to claim 1, Wherein formula B includes any one of the following compounds: 。
10. The composition for an organic light-emitting device according to claim 1, Wherein formula C includes any one of the following compounds: 。
11. the composition for an organic light-emitting device according to claim 1, Wherein the heterocyclic compound represented by chemical formula A, the heterocyclic compound represented by chemical formula B and the heterocyclic compound represented by chemical formula C are present in a molar ratio of 0.1-3:0.1-2:0.1-2.5.
12. The composition for an organic light-emitting device according to claim 1, Wherein the heterocyclic compound represented by formula C is contained in an amount of less than 60% based on the total mole number of the heterocyclic compound represented by formula a, the heterocyclic compound represented by formula B, and the heterocyclic compound represented by formula C.
13. An organic light emitting device comprising a first electrode, a second electrode disposed to face the first electrode, and one or more organic material layers disposed between the first electrode and the second electrode, wherein at least one of the organic material layers comprises the composition for the organic light emitting device according to any one of claims 1 to 12.
14. The organic light-emitting device according to claim 13, Wherein the organic material layer further comprises an emissive layer, and the emissive layer comprises the composition for the organic light emitting device.
15. The organic light-emitting device according to claim 14, Wherein the emission layer includes the heterocyclic compound represented by chemical formula a, the heterocyclic compound represented by chemical formula B, and the heterocyclic compound represented by chemical formula C at the same time.

Description

Composition for organic light emitting device and organic light emitting device including the same The present application claims priority and rights of korean patent application No. 10-2023-0130334 filed on the korean intellectual property office on day 10 and 12 of 2023, the entire contents of which are incorporated herein by reference. Technical Field The present invention relates to a composition for an organic light emitting device and an organic light emitting device including the composition for an organic light emitting device. Background An electroluminescent device is a self-emission display device, and has advantages such as a wide viewing angle, excellent contrast, and rapid response speed. The organic light emitting device has a structure in which an organic thin film is disposed between two electrodes. When a voltage is applied to the organic light emitting device having such a structure, electrons and holes injected from both electrodes are recombined in the organic thin film to form exciton pairs, and light is emitted as the exciton pairs decay. The organic thin film may be formed as a single layer or a plurality of layers, as required. The material of the organic thin film may have a light emitting function as needed. For example, as a material of the organic thin film, a compound capable of forming a light-emitting layer itself may be used, or a compound capable of functioning as a host or a dopant in a host-dopant type light-emitting layer may be used. In addition, as a material of the organic thin film, a compound capable of performing functions such as hole injection, hole transport, electron blocking, hole blocking, electron transport, and electron injection may also be used. Accordingly, in order to improve the performance, efficiency and lifetime of the organic light emitting device, development of materials for organic thin films is continuously required. Disclosure of Invention [ Technical problem ] The present invention is directed to a composition for an organic light emitting device and an organic light emitting device including the composition for an organic light emitting device. Technical scheme In one embodiment of the present application, there is provided a composition for an organic light emitting device, the composition including a heterocyclic compound represented by the following chemical formula a, a heterocyclic compound represented by the following chemical formula B, and a heterocyclic compound represented by the following chemical formula C. [ Chemical formula A ] In the chemical formula a, the amino acid sequence of the formula a, X is O or S, and the X is O or S, L1 and L2 are each independently of the other a direct bond, a substituted or unsubstituted C6-C60 arylene group, or a substituted or unsubstituted C2-C60 heteroarylene group, L1 and l2 are each independently an integer of 1 to 3, and when l1 or l2 is 2 or more, substituents in brackets are different from each other, Ar1 to Ar3 are each independently a substituted or unsubstituted C6-C60 aryl group, or a substituted or unsubstituted C2-C60 heteroaryl group, R1 to R3 are each independently hydrogen, deuterium, halogen radicals, cyano, substituted or unsubstituted C1-C60 alkyl, substituted or unsubstituted C3-C60 cycloalkyl, substituted or unsubstituted C2-C60 heterocycloalkyl, substituted or unsubstituted C6-C60 aryl, or substituted or unsubstituted C2-C60 heteroaryl, and R1 is an integer of 1 to 4, r2 is an integer of 0 to 4, and r3 is an integer of 1 to 4, provided that r1+r2+r3 is 8, and when each of r1, r2 and r3 is 2 or more, substituents in brackets are the same or different from each other, [ Chemical formula B ] In the chemical formula B, the amino acid sequence of the formula, Y is O or S, and the total number of the catalyst is O or S, Cy1 is a substituted or unsubstituted benzene ring, or a substituted or unsubstituted naphthalene ring, L3 and L4 are each independently of the other a direct bond, a substituted or unsubstituted C6-C60 arylene group, or a substituted or unsubstituted C2-C60 heteroarylene group, L3 and l4 are each independently an integer of 1 to 3, and when l3 or l4 is 2 or more, substituents in brackets may be the same or different, One of R4 and R5 is a substituted or unsubstituted heteroaryl group containing a c=n bond, and the other of R4 and R5 is a substituted or unsubstituted carbazolyl group or a substituted or unsubstituted amine group, R6 and R7 are identical or different from one another and are each independently of one another hydrogen, deuterium, a halogen radical, cyano, substituted or unsubstituted C1-C60 alkyl, substituted or unsubstituted C3-C60 cycloalkyl, substituted or unsubstituted C2-C60 heterocycloalkyl, substituted or unsubstituted C6-C60 aryl, or substituted or unsubstituted C2-C60 heteroaryl, and R6 is an integer of 1 to 4 and r7 is an integer of 1 to 6, and when r6 or r7 is 2 or more, substituents in brackets may be the same or different, [ Chemical f