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US-12622171-B2 - Organic compound and organic light emitting element comprising the same

US12622171B2US 12622171 B2US12622171 B2US 12622171B2US-12622171-B2

Abstract

The present disclosure provides an organic compound represented by the Chemical Formula 1 and an organic light emitting element including the same. Specifically, there may be provided an organic light emitting element having high efficiency or long lifespan by including a first electrode, a second electrode, and an organic material layer positioned therebetween, where the organic material layer includes an organic compound represented by the Chemical Formula 1.

Inventors

  • Seonkeun YOO
  • Youngjun Yu
  • SangBeomj KIM

Assignees

  • LG DISPLAY CO., LTD.

Dates

Publication Date
20260505
Application Date
20221020
Priority Date
20211206

Claims (16)

  1. 1 . An organic compound represented by the following Chemical Formula 1: wherein in Chemical Formula 1, X is O or S, R 1 to R 6 are each independently selected from the group consisting of a hydrogen; a halogen; a cyano group; a nitro group; a C 6 -C 60 aryl group; a fluorenyl group; a C 2 -C 60 heterocyclic group containing at least one heteroatom selected from the group consisting of O, N, S, Si and P; a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring; a C 1 -C 50 alkyl group; a C 2 -C 20 alkenyl group; a C 2 -C 20 alkynyl group; a C 1 -C 30 alkoxy group; and a C 6 -C 30 aryloxy group, L is selected from the group consisting of a single bond; a C 6 -C 60 arylene group; a fluorenylene group; a C 2 -C 60 heterocyclic group containing at least one heteroatom selected from the group consisting of O, N, S, Si, and P; and a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring, and the aryl group, the fluorenyl group, the heterocyclic group, the fused ring group, the alkyl group, the alkenyl group, the alkynyl group, the alkoxy group, the aryloxy group, the arylene group and the fluorenylene group may each be further substituted with one or more substituents selected from the group consisting of a nitro group; a cyano group; a halogen; an amino group; a C 1 -C 20 alkoxyl group; a C 1 -C 20 alkylthio group; a C 1 -C 20 alkyl group; a C 2 -C 20 alkenyl group; a C 2 -C 20 alkynyl group; a C 6 -C 20 aryl group; a fluorenyl group; a C 2 -C 20 heterocyclic group; a C 3 -C 20 cycloalkyl group; a C 7 -C 20 arylalkyl group; and a C 8 -C 20 arylalkenyl group.
  2. 2 . The organic compound according to claim 1 , wherein the organic compound represented by the Chemical Formula 1 is represented by any one of the following Chemical Formulas 2-1 to 2-4: wherein in Chemical Formulas 2-1 to 2-4, X, R 1 to R 6 , and L are the same as defined in Chemical Formula 1.
  3. 3 . The organic compound according to claim 1 , wherein the organic compound represented by the Chemical Formula 1 is represented by any one of the following Chemical Formulas 3-1 to 3-8: wherein in Chemical Formulas 3-1 to 3-8, X, R 1 to R 6 , and L are the same as defined in Chemical Formula 1.
  4. 4 . The organic compound according to claim 1 , wherein the organic compound represented by the Chemical Formula 1 is one or more of the following organic compounds:
  5. 5 . An organic light emitting element comprising: a first electrode; a second electrode; and an organic material layer positioned between the first electrode and the second electrode, and wherein the organic material layer comprises an organic compound represented by the following Chemical Formula 1: wherein in Chemical Formula 1, X is O or S, R 1 to R 6 are each independently selected from the group consisting of a hydrogen; a halogen; a cyano group; a nitro group; a C 6 -C 60 aryl group; a fluorenyl group; a C 2 -C 60 heterocyclic group containing at least one heteroatom selected from the group consisting of O, N, S, Si and P; a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring; a C 1 -C 50 alkyl group; a C 2 -C 20 alkenyl group; a C 2 -C 20 alkynyl group; a C 1 -C 30 alkoxy group; and a C 6 -C 30 aryloxy group, L is selected from the group consisting of a single bond; a C 6 -C 60 arylene group; a fluorenylene group; a C 2 -C 60 heterocyclic group containing at least one heteroatom selected from the group consisting of O, N, S, Si, and P; and a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring, and the aryl group, the fluorenyl group, the heterocyclic group, the fused ring group, the alkyl group, the alkenyl group, the alkynyl group, the alkoxy group, the aryloxy group, the arylene group and the fluorenylene group may be each further substituted with one or more substituents selected from the group consisting of a nitro group; a cyano group; a halogen; an amino group; a C 1 -C 20 alkoxyl group; a C 1 -C 20 alkylthio group; a C 1 -C 20 alkyl group; a C 2 -C 20 alkenyl group; a C 2 -C 20 alkynyl group; a C 6 -C 20 aryl group; a fluorenyl group; a C 2 -C 20 heterocyclic group; a C 3 -C 20 cycloalkyl group; a C 7 -C 20 arylalkyl group; and a C 8 -C 20 arylalkenyl group.
  6. 6 . The organic light emitting element according to claim 5 , wherein the organic compound represented by the Chemical Formula 1 is represented by any one of the following Chemical Formulas 2-1 to 2-4: wherein in Chemical Formulas 2-1 to 2-4, X, R 1 to R 6 , and L are the same as defined in Chemical Formula 1.
  7. 7 . The organic light emitting element according to claim 5 , wherein the organic compound represented by the Chemical Formula 1 is represented by any one of the following Chemical Formulas 3-1 to 3-8: wherein in Chemical Formulas 3-1 to 3-8, X, R 1 to R 6 , and L are the same as defined in Chemical Formula 1.
  8. 8 . The organic light emitting element according to claim 5 , wherein the organic compound represented by the Chemical Formula 1 is one or more of the following organic compounds:
  9. 9 . The organic light emitting element according to claim 5 , wherein the organic material layer comprises a light emitting layer, and wherein the light emitting layer comprises the organic compound.
  10. 10 . The organic light emitting element according to claim 9 , wherein the organic material layer comprises at least one layer of a hole injection layer, a hole transport layer, an electron transport layer and an electron injection layer.
  11. 11 . The organic light emitting element according to claim 9 , wherein the organic compound is a host compound of the light emitting layer.
  12. 12 . The organic light emitting element according to claim 11 , wherein the light emitting layer further comprises a host compound different from the organic compound.
  13. 13 . The organic light emitting element according to claim 5 , wherein the organic material layer comprises a first stack comprising a first light emitting layer and a second stack comprising a second light emitting layer.
  14. 14 . The organic light emitting element according to claim 13 , wherein the first light emitting layer comprises the organic compound.
  15. 15 . The organic light emitting element according to claim 14 , wherein the organic compound is a host compound of the first light emitting layer.
  16. 16 . The organic light emitting element according to claim 15 , wherein the first light emitting layer further comprises a host compound different from the organic compound.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the benefit of and the priority to Korean Patent Application No. 10-2021-0173254, filed on Dec. 6, 2021, which is hereby incorporated by reference for all purposes as if fully set forth herein. BACKGROUND Technical Field The present disclosure relates to an organic compound and an organic light emitting element comprising the organic compound. Description of the Related Art In general, an organic light emitting phenomenon refers to the phenomenon of converting electrical energy into light energy by means of an organic material. An organic light emitting element refers to an electric element using the organic light emitting phenomenon. The organic light emitting element using the organic light emitting phenomenon may be applied to a display device. Since the portable display device is driven by a battery, which is a limited power source, the organic light emitting element used in the portable display device requires excellent light emission efficiency. In addition, since the image should be displayed normally during use of the electronic device, a long life of the organic light emitting element may be also required. In order to improve efficiency, lifespan and driving voltage in the organic light emitting element, research has been conducted on the organic material included in the organic light emitting element. SUMMARY In order for the organic light emitting element to sufficiently exhibit its excellent characteristics, the materials constituting the organic material layer should be stable and have excellent efficiency. Since the phosphorescent organic light emitting element has a greater hole mobility than electron mobility in the light emitting layer and a long triplet state lifespan, excitons formed in the light emitting layer are distributed over a wide area, so that the light emission may be reduced. Accordingly, the inventors of the disclosure have invented an organic compound and an organic light emitting element that may have excellent efficiency or long lifespan. Accordingly, one or more embodiments of the present disclosure are directed to an organic compound and an organic light emitting element that may have high efficiency or long lifespan. Additional features and aspects will be set forth in the description that follows, and in part will be apparent from the description, or may be learned by practice of the present disclosure concepts provided herein. Other features and aspects of the present disclosure concepts may be realized and attained by the structure particularly pointed out in the written description, or derivable therefrom, and the claims hereof as well as the appended drawings. To achieve these and other advantages and in accordance with objects of the disclosure, as described herein, an aspect of the present disclosure is an organic compound represented by Chemical Formula 1 below. In another aspect of the present disclosure, an organic light emitting element includes a first electrode, a second electrode, and an organic material layer positioned between the first electrode and the second electrode. The organic material layer includes an organic compound represented by Chemical Formula 1. According to embodiments of the present disclosure, there may be provided an organic light emitting element having high efficiency or long lifespan. It is to be understood that both the foregoing general description and the following detailed description of the present disclosure are merely by way of example and are intended to provide further explanation of the inventive concepts as claimed. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain principles of the disclosure. FIGS. 1 to 4 are views schematically illustrating an organic light emitting element according to embodiments of the disclosure. DETAILED DESCRIPTION Reference will now be made in detail to some of the examples and embodiments of the disclosure illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Further, in the following description of examples or embodiments of the disclosure, detailed descriptions of well-known functions and components incorporated herein will be omitted when it is determined that the description may make the subject matter in some embodiments of the disclosure rather unclear. The terms such as “including”, “having”, “containing”, “constituting” “make up of”, and “formed of” used herein are generally intended to allow other components to be added unless the terms are used with the term “only”. As used herein, singular forms are intended to include plural forms unless the context clearly indicates otherwise.