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KR-102963654-B1 - LIGHT EMITTING ELEMENT AND AMINE COMPOUND FOR THE SAME

KR102963654B1KR 102963654 B1KR102963654 B1KR 102963654B1KR-102963654-B1

Abstract

A light-emitting element of one embodiment may include a first electrode, a second electrode disposed on the first electrode, and at least one functional layer disposed between the first electrode and the second electrode. The at least one functional layer may include an amine compound represented by the following chemical formula 1. Accordingly, the light-emitting element may exhibit long lifespan characteristics. In addition, the light-emitting element may exhibit characteristics such as reduced driving voltage and improved brightness and efficiency. [Chemical Formula 1]

Inventors

  • 김채영
  • 김동준
  • 박한규
  • 유병욱
  • 조서원
  • 조소희

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260513
Application Date
20211104

Claims (20)

  1. First electrode; A second electrode disposed on the first electrode; and A light-emitting device comprising: at least one functional layer disposed between the first electrode and the second electrode and comprising an amine compound represented by the following chemical formula 1; [Chemical Formula 1] In the above chemical formula 1, Ar 1 to Ar 4 are each independently substituted or unsubstituted ring-forming aryl groups having 6 to 30 carbon atoms, or heteroaryl groups having 2 to 30 carbon atoms, substituted or unsubstituted ring-forming groups containing N, O, or S as ring-forming atoms.
  2. In Article 1, The above chemical formula 1 is a light-emitting element represented by any one of the following chemical formulas 1-1 and 1-3: [Chemical Formula 1-1] [Chemical Formula 1-3] In the above chemical formulas 1-1 and 1-3, Ar 1 to Ar 4 are the same as defined in Chemical Formula 1 above.
  3. In Article 1, The above chemical formula 1 is a light-emitting element represented by the following chemical formula 2: [Chemical Formula 2] In the above chemical formula 2, Ar 11 and Ar 13 are each independently substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, or heteroaryl groups having 2 to 30 carbon atoms, which are substituted or unsubstituted aryl groups containing N, O, or S as cyclic atoms.
  4. In Paragraph 3, The above chemical formula 2 is a light-emitting element represented by the following chemical formula 2-1: [Chemical Formula 2-1] In the above chemical formula 2-1, R1 to R5 and R11 to R15 are each independently a hydrogen atom, a substituted or unsubstituted amine group, a substituted or unsubstituted oxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, or a substituted or unsubstituted ring-forming aryl group having 6 to 30 carbon atoms, or form a ring by combining with an adjacent group.
  5. In Paragraph 3, The above chemical formula 2 is a light-emitting element represented by the following chemical formula 2-2A or chemical formula 2-2B: [Chemical Formula 2-2A] [Chemical Formula 2-2B] In the above chemical formulas 2-2A and 2-2B, X 1 is C(CH 3 ) 2 , N(Ph), O, or S, and Ar 11 and Ar 13 are the same as defined in Chemical Formula 2 above.
  6. In Article 1, The above Ar 1 to Ar 4 are each independently light-emitting elements represented by any one of the following A-1 to A-6: .
  7. In Article 1, A light-emitting element in which the above Ar 1 to Ar 4 are each independently a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazole group, a substituted or unsubstituted dibenzofuran group, or a substituted or unsubstituted dibenzothiophene group.
  8. In Article 1, A light-emitting element in which Ar1 and Ar3 are identical and Ar2 and Ar4 are identical in the above chemical formula 1.
  9. In Article 1, The above at least one functional layer comprises a light-emitting layer, a hole transport region disposed between the first electrode and the light-emitting layer, and an electron transport region disposed between the light-emitting layer and the second electrode, and The hole transport region above is a light-emitting device comprising the amine compound above.
  10. In Article 9, The hole transport region comprises a hole injection layer disposed on the first electrode, a hole transport layer disposed on the hole injection layer, and an electron blocking layer disposed on the hole transport layer. A light-emitting device comprising at least one of the hole injection layer, the hole transport layer, and the electron blocking layer, wherein the amine compound is included.
  11. In Article 1, The above amine compound is a light-emitting device represented by any one of the compounds of the following compound group 1: [Compound Group 1] .
  12. Amine compound represented by the following chemical formula 1: [Chemical Formula 1] In the above chemical formula 1, Ar 1 to Ar 4 are each independently substituted or unsubstituted ring-forming aryl groups having 6 to 30 carbon atoms, or heteroaryl groups having 2 to 30 carbon atoms, substituted or unsubstituted ring-forming groups containing N, O, or S as ring-forming atoms.
  13. In Article 12, The above Chemical Formula 1 is an amine compound represented by any one of the following Chemical Formulas 1-1 and 1-3: [Chemical Formula 1-1] [Chemical Formula 1-3] In the above chemical formulas 1-1 and 1-3, Ar 1 to Ar 4 are the same as defined in Chemical Formula 1 above.
  14. In Article 12, The above chemical formula 1 is an amine compound represented by the following chemical formula 2: [Chemical Formula 2] In the above chemical formula 2, Ar 11 and Ar 13 are each independently substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, or heteroaryl groups having 2 to 30 carbon atoms, which are substituted or unsubstituted aryl groups containing N, O, or S as cyclic atoms.
  15. In Article 14, The above chemical formula 2 is an amine compound represented by the following chemical formula 2-1: [Chemical Formula 2-1] In the above chemical formula 2-1, R1 to R5 and R11 to R15 are each independently a hydrogen atom, a substituted or unsubstituted amine group, a substituted or unsubstituted oxy group, a substituted or unsubstituted thio group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 10 carbon atoms, or a substituted or unsubstituted ring-forming aryl group having 6 to 30 carbon atoms, or form a ring by combining with an adjacent group.
  16. In Article 14, The above Chemical Formula 2 is an amine compound represented by the following Chemical Formula 2-2A or Chemical Formula 2-2B: [Chemical Formula 2-2A] [Chemical Formula 2-2B] In the above chemical formulas 2-2A and 2-2B, X 1 is C(CH 3 ) 2 , N(Ph), O, or S, and Ar 11 and Ar 13 are the same as defined in Chemical Formula 2 above.
  17. In Article 12, The above Ar 1 to Ar 4 are each independently amine compounds represented by any one of the following A-1 to A-6: .
  18. In Article 12, The above Ar 1 to Ar 4 are amine compounds, each of which is independently a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazole group, a substituted or unsubstituted dibenzofuran group, or a substituted or unsubstituted dibenzothiophen group.
  19. In Article 12, An amine compound in which Ar 1 and Ar 3 are identical, and Ar 2 and Ar 4 are identical in the above chemical formula 1.
  20. In Article 12, The above chemical formula 1 is an amine compound represented by any one of the compounds of compound group 1 below: [Compound Group 1] .

Description

Light Emitting Element and Amine Compound for the Same The present invention relates to a light-emitting element and an amine compound used therein. Recently, there has been active development of organic electroluminescence display devices and the like as image display devices. Organic electroluminescence display devices and the like are display devices that realize a display by causing the light-emitting material of the light-emitting layer to emit light by recombining holes and electrons injected from a first electrode and a second electrode in the light-emitting layer. In applying light-emitting devices to display devices, high efficiency and long lifespan are required, and there is a continuous demand for the development of materials for light-emitting devices that can reliably realize these requirements. FIG. 1 is a plan view showing a display device according to one embodiment. Figure 2 is a cross-sectional view showing the part corresponding to line I-I' of Figure 1. FIG. 3 is a cross-sectional view schematically showing a light-emitting element of one embodiment. FIG. 4 is a cross-sectional view schematically showing a light-emitting element of one embodiment. FIG. 5 is a cross-sectional view schematically showing a light-emitting element of one embodiment. FIG. 6 is a cross-sectional view schematically showing a light-emitting element of one embodiment. FIG. 7 is a cross-sectional view showing a display device according to one embodiment. FIG. 8 is a cross-sectional view showing a display device according to one embodiment. FIG. 9 is a cross-sectional view showing a display device according to one embodiment. FIG. 10 is a cross-sectional view showing a display device according to one embodiment. The present invention is capable of various modifications and may take various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the invention to the specific disclosed forms, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. In this specification, where a component (or region, layer, part, etc.) is described as being "on," "connected," or "combined" with another component, it means that it may be directly placed/connected/combined with the other component, or that a third component may be placed between them. Identical reference numerals denote identical components. Additionally, in the drawings, the thicknesses, proportions, and dimensions of components are exaggerated for the effective illustration of the technical content. "And/or" includes all one or more combinations that the associated components may define. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise. Additionally, terms such as "below," "lower side," "above," and "upper side" are used to describe the relationships between the components depicted in the drawings. These terms are relative concepts and are described based on the directions indicated in the drawings. Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Furthermore, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an overly ideal or overly formal sense unless explicitly defined herein. Hereinafter, a light-emitting element and an amine compound of one embodiment will be described with reference to the drawings. FIG. 1 is a plan view showing one embodiment of a display device (DD). FIG. 2 is a cross-sectional view of the display device (DD) of one embodiment. FIG. 2 is a cross-sectional view showing the portion corresponding to line I-I' of FIG. 1. A display device (DD) may include a display panel (DP) and an optical layer (PP) disposed on the display panel (DP). The display panel (DP) may include light-emitting elements (ED-1, ED-2, ED-3). The display device (DD