Light-emitting element, compound used therefor, and display device

Abstract

A light-emitting element, a compound for the light-emitting element, and a display device including the light-emitting element are provided. The light emitting element includes a first electrode, a second electrode on the first electrode, and at least one functional layer. The functional layer includes a compound having two phenylene groups attached to a cycloalkyl group and further including a phosphine oxide group and a triazine group. The compound may be between the first electrode and the second electrode.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0088889 filed in the Korean Intellectual Property Office on July 10, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure herein relates to a compound for a light-emitting element, a light-emitting element including the compound, a display device including the light-emitting element, and to a light-emitting element and a display device including the novel compound in an electron transport layer. Background Art

[0004] Recently, development of an organic electroluminescent display device as an image display device is being actively carried out. The organic electroluminescent display device is a display device including a so-called "self-luminous" type or kind of light-emitting element, in which holes and electrons injected from a first electrode and a second electrode, respectively, are combined in an emission layer of the display device. Subsequently, the light-emitting material in the emission layer (e.g., light-emitting layer) emits light to realize (e.g., implement) display (e.g., display of an image).

[0005] The implementation of light-emitting elements to display devices requires (or expects) a reduction in driving voltage and an increase in luminous efficiency and lifetime. Therefore, there is a need and expectation for continued research and development of materials for light-emitting elements that can stably achieve such characteristics or expectations. Summary of the invention

[0006] One or more aspects of embodiments of the present disclosure relate to light emitting elements with improved emission efficiency and element lifetime.

[0007] One or more aspects of embodiments of the present disclosure relate to compounds that can improve emission efficiency and element life of a light-emitting element.

[0008] One or more aspects of an embodiment of the present disclosure are directed to a display device having excellent or suitable display quality by including a light emitting element having improved emission efficiency and element lifespan.

[0009] The light emitting element of one or more embodiments includes: a first electrode; a second electrode provided on the first electrode; and at least one functional layer including the compound represented by Formula 1 and provided between the first electrode and the second electrode.

[0010] Formula 1

[0011]

[0012] In Formula 1, Cy may be a substituted or unsubstituted cycloalkyl group having 3 to 30 ring carbon atoms, L may be a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms, and R 1 To R 4 may be each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, R a and R b "a" and "b" may each independently be a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted thiol group, a substituted or unsubstituted oxy group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, and / or combine with an adjacent group to form a ring, "a" and "b" may each independently be an integer from 0 to 4, and "l" may be 1 or 2.

[0013] In one or more than one embodiments, Formula 1 may be represented by at least one selected from Formula 1-1a to Formula 1-1c.

[0014] Formula 1-1a

[0015]

[0016] Formula 1-1b

[0017]

[0018] Formula 1-1c

[0019]

[0020] In Formula 1-1a to Formula 1-1c, L, R 1 To R 4 , R a , R b , "a", "b" and "l" may each independently be defined as in Formula 1.

[0021] In one or more than one embodiment, R 1 and R 2 Each may independently be an unsubstituted methyl group or an unsubstituted phenyl group.

[0022] In one or more than one embodiment, R 3 and R4 Each of the groups may independently be an unsubstituted phenyl group, an unsubstituted biphenyl group, an unsubstituted terphenyl group, an unsubstituted naphthyl group, an unsubstituted anthracenyl group, or anthracenyl group substituted with a phenyl group.

[0023] In one or more than one embodiment, L can be an unsubstituted phenylene group, an unsubstituted naphthylene group, or an unsubstituted anthracene group.

[0024] In one or more than one embodiments, Formula 1 can be represented by Formula 1-2a or Formula 1-2b.

[0025] Formula 1-2a

[0026]

[0027] Formula 1-2b

[0028]

[0029] In Formula 1-2a and Formula 1-2b, Cy, L, R 1 To R 4 , R a , R b , "a", "b" and "l" may each independently be defined as in Formula 1.

[0030] In one or more than one embodiment, R a and R b They may each be a hydrogen atom.

[0031] In one or more embodiments, the at least one functional layer may include an emission layer, a hole transport region provided between the first electrode and the emission layer, and an electron transport region provided between the emission layer and the second electrode, and the electron transport region may contain the compound represented by Formula 1.

[0032] The compound of one or more embodiments is represented by Formula 1:

[0033] Formula 1

[0034]

[0035] In Formula 1, Cy may be a substituted or unsubstituted cycloalkyl group having 3 to 30 ring carbon atoms, L may be a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms, and R may be 1 To R 4may be each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, R a and R b "a" and "b" may each independently be a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted thiol group, a substituted or unsubstituted oxy group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, and / or combine with an adjacent group to form a ring, "a" and "b" may each independently be an integer from 0 to 4, and "l" may be 1 or 2.

[0036] In one or more than one embodiments, Formula 1 may be represented by at least one selected from Formula 1-1a to Formula 1-1c.

[0037] Formula 1-1a

[0038]

[0039] Formula 1-1b

[0040]

[0041] Formula 1-1c

[0042]

[0043] In Formula 1-1a to Formula 1-1c, L, R 1 To R 4 , R a , R b , "a", "b" and "l" may each independently be defined as in Formula 1.

[0044] In one or more than one embodiment, R 1 and R 2 Each may independently be an unsubstituted methyl group or an unsubstituted phenyl group.

[0045] In one or more than one embodiment, R 3 and R 4 Each of the groups may independently be an unsubstituted phenyl group, an unsubstituted biphenyl group, an unsubstituted terphenyl group, an unsubstituted naphthyl group, an unsubstituted anthracenyl group, or anthracenyl group substituted with a phenyl group.

[0046] In one or more than one embodiment, L can be an unsubstituted phenylene group, an unsubstituted naphthalene group, or an unsubstituted anthracene group.

[0047] In one or more than one embodiments, Formula 1 can be represented by Formula 1-2a or Formula 1-2b.

[0048] Formula 1-2a

[0049]

[0050] Formula 1-2b

[0051]

[0052] In Formula 1-2a to Formula 1-2b, Cy, L, R 1 To R 4 , R a , R b , "a", "b" and "l" may each independently be defined as in Formula 1.

[0053] In one or more than one embodiment, R a and R b They may each be a hydrogen atom.

[0054] A display device of one or more embodiments includes: a base layer; a circuit layer provided on the base layer; and a display element layer including a light-emitting element and provided on the circuit layer, wherein the light-emitting element includes a first electrode, a second electrode opposite to (e.g., provided oppositely to) the first electrode (e.g., facing the first electrode), and at least one functional layer provided between the first electrode and the second electrode, and the at least one functional layer contains a compound represented by Formula 1.

[0055] Formula 1

[0056]

[0057] In Formula 1, Cy may be a substituted or unsubstituted cycloalkyl group having 3 to 30 ring carbon atoms, L may be a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms, and R may be 1 To R 4 may be each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, R a and R b"a" and "b" may each independently be a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted thiol group, a substituted or unsubstituted oxy group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, and / or combine with an adjacent group to form a ring, "a" and "b" may each independently be an integer from 0 to 4, and "l" may be 1 or 2.

[0058] In one or more embodiments, the at least one functional layer may include an emission layer, a hole transport region provided between the first electrode and the emission layer, and an electron transport region provided between the emission layer and the second electrode, and the electron transport region may contain the compound represented by Formula 1.

[0059] In one or more embodiments, the display device may include quantum dots and may further include a light management layer provided on the display element layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The accompanying drawings illustrate embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. In the drawings:

[0061] Figure 1 is a plan view showing a display device according to one or more embodiments of the present disclosure;

[0062] Figure 2 is a cross-sectional view showing a display device according to one or more embodiments of the present disclosure;

[0063] Figure 3 is a cross-sectional view schematically illustrating a light emitting element according to one or more embodiments of the present disclosure;

[0064] Figure 4 is a cross-sectional view schematically illustrating a light emitting element according to one or more embodiments of the present disclosure;

[0065] Figure 5 is a cross-sectional view schematically illustrating a light emitting element according to one or more embodiments of the present disclosure;

[0066] Figure 6is a cross-sectional view schematically illustrating a light emitting element according to one or more embodiments of the present disclosure;

[0067] Figure 7 is a cross-sectional view showing a display device according to one or more embodiments of the present disclosure;

[0068] Figure 8 is a cross-sectional view showing a display device according to one or more embodiments of the present disclosure;

[0069] Fig. 9 is a cross-sectional view showing a display device according to one or more embodiments of the present disclosure;

[0070] Fig.10 is a cross-sectional view showing a display device according to one or more embodiments of the present disclosure; and

[0071] Fig.11 is a perspective view schematically illustrating an electronic device including a display device according to one or more embodiments of the present disclosure. DETAILED DESCRIPTION

[0072] The present disclosure may be modified in one or more than one suitable manner and have a variety of forms, and therefore specific embodiments will be illustrated in the accompanying drawings and described in more detail in the detailed description of the present disclosure. However, it should be understood that it is not intended to limit the present disclosure to the specific form disclosed, but is intended to cover all modifications, equivalents and substitutions that fall within the spirit and scope of the present disclosure.

[0073] When explaining each accompanying drawing, the same reference numerals are used to refer to the same elements. In the accompanying drawings, for the clarity of the present disclosure, the size of each structure is illustrated in an amplified manner. It should be understood that although the terms "first", "second", etc. can be used to describe one or more than one suitable components in this article, these components should not be limited by these terms. These terms are only used to distinguish one component from another component. For example, without departing from the scope of the exemplary embodiments of the present disclosure, the first component can be referred to as the second component, and similarly, the second component can be referred to as the first component.

[0074] As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0075] As used herein, the term "and / or" includes any and all combinations that the relevant configurations can define.

[0076] As used herein, the terms "use," "using," and "used" may be considered synonymous with the terms "utilize," "utilizing," and "utilized," respectively.

[0077] As used herein, expressions such as “at least one of,” “one of,” “selected from,” and “selected from,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list. For example, expressions such as “at least one of a through c,” “at least one of a, b, and c,” and “at least one of a, b, and / or c” may mean only a, only b, only c, both a and b (e.g., simultaneously), both a and c (e.g., simultaneously), both b and c (e.g., simultaneously), all of a, b, and c, or variations thereof.

[0078] The term "and / or" includes all combinations of one or more than one of the associated listed elements.

[0079] In the present application, it should be understood that the terms “include,” “includes,” “including,” “comprise,” “comprises,” “comprising,” “has,” “having,” “have” and the like indicate the presence of features, numbers, steps, operations, components, parts or a combination thereof disclosed in the specification, but do not exclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or a combination thereof.

[0080] In the present application, when a layer, film, region or plate is referred to as being "on" or "in the upper part of" another layer, film, region or plate, it may not only be "directly on" the layer, film, region or plate, but also there may be an intervening layer, film, region or plate. In contrast, when a layer, film, region or plate is referred to as being "below" or "in the lower part of" another layer, film, region or plate, it may not only be directly under the layer, film, region or plate, but also there may be an intervening layer, film, region or plate. In some embodiments, it should be understood that when a component is referred to as being "on" another component, it may be provided above the other component, or it may also be provided under the other component. The aforementioned comparative terms are relative concepts and are described based on the directions indicated in the accompanying drawings. It should be understood that these terms have relative concepts and are described based on the directions depicted in the accompanying drawings. It should be understood that spatially relative terms are intended to cover different directions of the device when in use or operation in addition to the directions depicted in the accompanying drawings. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0081] As used herein, the term "may" will be understood to refer to "one or more than one embodiments of the present disclosure," some of which include the described elements, and some of which exclude the described elements and / or include alternative elements. Similarly, alternative language such as "or" refers to "one or more than one embodiments of the present disclosure," each including the corresponding listed items.

[0082] Unless otherwise defined, all terms used herein (including chemical terms, technical terms and scientific terms) have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. It should be further understood that 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 art, and should not be interpreted in an idealized or overly formal sense, unless explicitly defined as such herein.

[0083] As used herein, the phrase "consisting essentially of" means that any additional components do not substantially affect the chemical, physical, optical, or electrical properties of the semiconductor film.

[0084] As used herein, the phrase “on a plane” or “plan view” means observing a target portion from the top, and the phrase “on a cross section” means observing a cross section formed by vertically cutting the target portion from the side.

[0085] In the present disclosure, "does not include one (one) kind or any 'component'", "excludes one (one) kind or any 'component'", "does not contain 'component'" and the like mean that the "component" is not added, selected or used as a component in the composition / structure, but due to other impurities and / or external factors, less than the appropriate amount of the "component" may still be included.

[0086] definition

[0087] In the specification, the term "substituted or unsubstituted" may refer to being substituted or unsubstituted by at least one substituent selected from the group consisting of a deuterium atom, a halogen atom, a cyano group, a nitro group, an amino group, a silyl group, an oxy group, a sulfenyl group, a sulfinyl group, a sulfonyl group, a carbonyl group, a boron group, a phosphine oxide group, a phosphine sulfide group, an alkyl group, an alkenyl group, an alkynyl group, a hydrocarbon ring group, an aryl group and a heterocyclic group. In some embodiments, each of the substituents exemplified herein may be substituted or unsubstituted. For example, a biphenyl group may be interpreted as an aryl group or a phenyl group substituted by a phenyl group.

[0088] In the specification, the phrase "bonded to an adjacent group to form a ring" may refer to a group bonded to an adjacent group to form a substituted or unsubstituted hydrocarbon ring or a substituted or unsubstituted heterocycle. Hydrocarbon rings include aliphatic hydrocarbon rings and aromatic hydrocarbon rings. Heterocycles include aliphatic heterocycles and aromatic heterocycles. Hydrocarbon rings and heterocycles may be monocyclic or polycyclic. In some embodiments, the ring formed by bonding to each other may be connected to another ring to form a spiro structure.

[0089] In the specification, the term "adjacent group" may refer to a substituent that replaces an atom directly connected to the atom substituted by the corresponding substituent, another substituent that replaces the atom substituted by the corresponding substituent, or a substituent that is spatially located at the closest position to the corresponding substituent. For example, the two methyl groups in 1,2-dimethylbenzene may be interpreted as "adjacent groups" to each other, and the two ethyl groups in 1,1-diethylcyclopentane may be interpreted as "adjacent groups" to each other. In some embodiments, the two methyl groups in 4,5-dimethylphenanthrene may be interpreted as "adjacent groups" to each other.

[0090] In the specification, examples of the halogen atom may include a fluorine atom, a chlorine atom, a bromine atom or an iodine atom.

[0091] In the specification, the alkyl group may be straight chain or branched. The number of carbons in the alkyl group is 1 to 50, 1 to 30, 1 to 20, 1 to 10 or 1 to 6. Examples of the alkyl group may include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, a n-butyl group, a sec-butyl group, a tert-butyl group, an isobutyl group, a 2-ethylbutyl group, a 3,3-dimethylbutyl group, an n-pentyl group, an isopentyl group, a neopentyl group, a tert-pentyl group, a 1-methylpentyl group, a 3-methylpentyl group, a 2-ethylpentyl group, a 4-methyl-2-pentyl group, an n-hexyl group, a 1-methylhexyl group, a 2-ethyl tert-octyl group, 2-ethyloctyl group, 2-butyloctyl group, 2-hexyloctyl group, 3,7-dimethyloctyl group, n-nonyl group, n-decyl group, 2-ethyldecyl group, 2-butyldecyl group, 2-hexyldecyl group, 2-octyldecyl group, An n-undecyl group, an n-dodecyl group, a 2-ethyldodecyl group, a 2-butyldodecyl group, a 2-hexyldodecyl group, a 2-octyldodecyl group, an n-tridecyl group, an n-tetradecyl group, an n-pentadecyl group, an n-hexadecyl group, a 2-ethylhexadecyl group, a 2-butylhexadecyl group, a 2-hexylhexadecyl group, a 2-octylhexadecyl group, an n-heptadecyl group, an n-octadecyl group, an n-nonadecyl group, an n-eicosyl group, a 2-ethyleicosyl group, a 2-butyleicosyl group, a 2-hexyleicosyl group, a 2-octyleicosyl group, an n-heneicosyl group, an n-docosyl group, an n-tricosyl group, an n-tetracosyl group, an n-pentacosyl group, an n-hexacosyl group, an n-heptacosyl group, an n-octacosyl group, an n-nonacosyl group, an n-triacontyl group, and the like, but the embodiments of the present disclosure are not limited thereto.

[0092] In the specification, the cycloalkyl group may refer to a cyclic alkyl group. The carbon number in the cycloalkyl group is 3 to 50, 3 to 30, 3 to 20 or 3 to 10. Examples of cycloalkyl groups may include cyclopropyl groups, cyclobutyl groups, cyclopentyl groups, cyclohexyl groups, 4-methylcyclohexyl groups, 4-tert-butylcyclohexyl groups, cycloheptyl groups, cyclooctyl groups, cyclononyl groups, cyclodecyl groups, norbornyl groups, 1-adamantyl groups, 2-adamantyl groups, isobornyl groups, bicycloheptyl groups, etc., but the embodiments of the present disclosure are not limited thereto.

[0093] In the specification, an alkenyl group refers to a hydrocarbon group containing at least one carbon-carbon double bond in the middle or at the end of an alkyl group having 2 or more carbon atoms. An alkenyl group may be straight or branched. The number of carbon atoms in the alkenyl group is not particularly limited, but may be 2 to 30, 2 to 20, or 2 to 10. Examples of alkenyl groups include, for example, vinyl groups, 1-butenyl groups, 1-pentenyl groups, 1,3-butadienyl groups, styryl groups, styryl vinyl groups, but embodiments of the present disclosure are not limited thereto.

[0094] In the specification, alkynyl group refers to a hydrocarbon group containing at least one carbon-carbon triple bond in the middle or at the end of an alkyl group having 2 or more carbon atoms. Alkynyl group can be straight chain or branched. Although the number of carbon atoms is not specifically limited, it is 2 to 30, 2 to 20 or 2 to 10. Specific examples of alkynyl group can include ethynyl group, propynyl group etc., but are not limited thereto.

[0095] In the specification, the hydrocarbon ring refers to any functional group or substituent derived from an aliphatic hydrocarbon ring. The hydrocarbon ring group may be a saturated hydrocarbon ring group having 5 to 20 ring-forming carbon atoms.

[0096] In the specification, an aryl group refers to any functional group or substituent derived from an aromatic hydrocarbon ring. The aryl group may be a monocyclic aryl group or a polycyclic aryl group. The number of ring carbon atoms in the aryl group may be 6 to 30, 6 to 20, or 6 to 15. Examples of aryl groups may include a phenyl group, a naphthyl group, a fluorenyl group, an anthracenyl group, a phenanthrenyl group, a biphenyl group, a terphenyl group, a quaterphenyl group, a pentaphenyl group, a hexaphenyl group, a triphenylene group, a pyrenyl group, a benzofluoranthenyl group, However, the embodiments of the present disclosure are not limited thereto.

[0097] In the specification, the fluorenyl group may be substituted, and two substituents may be bonded to each other to form a spiro structure. Examples of substituted fluorenyl groups are as follows. However, embodiments of the present disclosure are not limited thereto.

[0098]

[0099] The heterocyclic group herein refers to any functional group or substituent derived from a ring containing at least one of B, O, N, P, Si and S as a heteroatom (e.g., 1 to 15, 1 to 10, 1 to 5 or 1 to 3 heteroatoms). The heterocyclic group includes an aliphatic heterocyclic group and an aromatic heterocyclic group. The aromatic heterocyclic group can be a heteroaryl group. The aliphatic heterocycle and the aromatic heterocycle can be monocyclic or polycyclic.

[0100] In the specification, the heterocyclic group may contain at least one of B, O, N, P, Si and S as a heteroatom. When the heterocyclic group contains two or more heteroatoms, the two or more heteroatoms may be the same or different from each other. The heterocyclic group may be a monocyclic heterocyclic group or a polycyclic heterocyclic group, and includes a heteroaryl group. The number of ring carbon atoms in the heterocyclic group may be 2 to 30, 2 to 20 or 2 to 10.

[0101] In the specification, the aliphatic heterocyclic group may contain at least one of B, O, N, P, Si and S as a heteroatom. The number of ring carbon atoms in the aliphatic heterocyclic group may be 2 to 30, 2 to 20, or 2 to 10. Examples of the aliphatic heterocyclic group may include an oxirane group, a thiirane group, a pyrrolidine group, a piperidine group, a tetrahydrofuran group, a tetrahydrothiophene group, a thihexane group, a tetrahydropyran group, a 1,4-dioxane group, and the like, but embodiments of the present disclosure are not limited thereto.

[0102] In the specification, the heteroaryl group may contain at least one of B, O, N, P, Si and S as a heteroatom (e.g., 1 to 15, 1 to 10, 1 to 5 or 1 to 3 heteroatoms). When the heteroaryl group contains two or more heteroatoms, the two or more heteroatoms may be the same or different from each other. The heteroaryl group may be a monocyclic heterocyclic group or a polycyclic heterocyclic group. The number of ring carbon atoms in the heteroaryl group may be 2 to 30, 2 to 20 or 2 to 10. Examples of the heteroaryl group may include a thiophene group, a furan group, a pyrrole group, an imidazole group, a pyridine group, a bipyridine group, a pyrimidine group, a triazine group, a triazole group, an acridine group, a pyridazine group, a pyrazine group, a quinoline group, a quinazoline group, a quinoxaline group, a phenoxazine group, a phthalazine group, a pyridopyrimidine group, a pyridopyrazine group, a pyrazinopyrazine group, an isoquinoline group, an indole group, a carbazole group, an N-arylcarbazole group, N-heteroarylcarbazole group, N-alkylcarbazole group, benzoxazole group, benzimidazole group, benzothiazole group, benzocarbazole group, benzothiophene group, dibenzothiophene group, thienothiophene group, benzofuran group, phenanthroline group, thiazole group, isoxazole group, oxazole group, oxadiazole group, thiadiazole group, phenothiazine group, dibenzosilole group, dibenzofuran group and the like, but the embodiments of the present disclosure are not limited thereto.

[0103] In the specification, the description of the aryl group may be applied to the arylene group, but the arylene group is a divalent group. The description of the heteroaryl group may be applied to the heteroarylene group, but the heteroarylene group is a divalent group.

[0104] In the present specification, silyl groups include alkylsilyl groups and arylsilyl groups. Examples of silyl groups may include trimethylsilyl groups, triethylsilyl groups, tert-butyldimethylsilyl groups, propyldimethylsilyl groups, triphenylsilyl groups, diphenylsilyl groups, phenylsilyl groups, etc., but the embodiments of the present disclosure are not limited thereto.

[0105] In the specification, the number of carbon atoms and / or the number of ring-forming carbon atoms in the carbonyl group is not particularly limited, but may be 1 to 40, 1 to 30, or 1 to 20. For example, the carbonyl group may have the following structure, but embodiments of the present disclosure are not limited thereto.

[0106]

[0107] In the specification, the number of carbon atoms in the sulfinyl group and the sulfonyl group is not particularly limited, but may be 1 to 30, 1 to 20, 1 to 10, or 1 to 6. The sulfinyl group may include an alkylsulfinyl group and an arylsulfinyl group. The sulfonyl group may include an alkylsulfonyl group and an arylsulfonyl group.

[0108] In the specification, the sulfenyl group may include an alkylsulfenyl group and an arylsulfenyl group. The sulfenyl group may refer to a sulfur atom bonded to an alkyl group or an aryl group as defined herein. Examples of sulfenyl groups may include a methylsulfenyl group, an ethylsulfenyl group, a propylsulfenyl group, a pentylsulfenyl group, a hexylsulfenyl group, an octylsulfenyl group, a dodecylsulfenyl group, a cyclopentylsulfenyl group, a cyclohexylsulfenyl group, a phenylsulfenyl group, a naphthylsulfenyl group, but the embodiments of the present disclosure are not limited thereto.

[0109] In the specification, an oxy group may refer to an oxygen atom bonded to an alkyl group or an aryl group as defined herein. An oxy group may include an alkoxy group and an aryloxy group. An alkoxy group may be a straight chain, a branched chain or a cyclic chain. The number of carbon atoms in the alkoxy group is not particularly limited, but may be, for example, 1 to 20 or 1 to 10. Examples of oxy groups may include methoxy, ethoxy, n-propoxy, isopropoxy, butoxy, pentyloxy, hexyloxy, octyloxy, nonyloxy, decyloxy, benzyloxy, etc., but the embodiments of the present disclosure are not limited thereto.

[0110] Boron groups herein may refer to boron atoms bonded to alkyl groups or aryl groups as defined herein. Boron groups include alkyl boron groups and aryl boron groups. Examples of boron groups may include dimethyl boron groups, tert-butyl methyl boron groups, diphenyl boron groups, phenyl boron groups, etc., but embodiments of the present disclosure are not limited thereto.

[0111] In the specification, the number of carbon atoms in the amine group is not particularly limited, but may be 1 to 30, 1 to 20, 1 to 10, or 1 to 6. The amine group may include an alkylamine group and an arylamine group. Examples of the amine group may include a methylamine group, a dimethylamine group, a phenylamine group, a diphenylamine group, a naphthylamine group, a 9-methyl-anthrylamine group, etc., but the embodiments of the present disclosure are not limited thereto.

[0112] In the specification, the alkyl group in the alkylthio group, the alkylsulfonyloxy group, the alkylaryl group, the alkylamino group, the alkylboron group, the alkylsilyl group, and the alkylamine group is the same as the examples of the alkyl group described herein.

[0113] In the specification, the aryl group in the aryloxy group, arylthio group, arylsulfonyloxy group, arylamino group, arylboron group, arylsilyl group, arylamine group is the same as the examples of the aryl group described herein.

[0114] In the specification, a direct bond may refer to a single bond.

[0115] In some embodiments, in the description, Refers to the location to be connected.

[0116] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In the present disclosure, the term "light emitting device" and the term "light emitting element" may be used interchangeably.

[0117] Display device

[0118] Figure 1 is a plan view illustrating one or more embodiments of a display device DD. Figure 2 is a cross-sectional view of a display device DD of the embodiment. Figure 2 is an example showing Figure 1 A cross-sectional view of a portion taken along line II'.

[0119] The display device DD may include a display panel DP and an optical layer PP provided on the display panel DP. The display panel DP includes light-emitting devices ED-1, ED-2, and ED-3. The display device DD may include a plurality of light-emitting devices ED-1, ED-2, and ED-3. The optical layer PP may be provided on the display panel DP to control reflected light due to external light in the display panel DP. The optical layer PP may include, for example, a polarizing layer or a color filter layer. In some embodiments, unlike the configuration illustrated in the drawings, the display device DD of one or more embodiments may not provide (e.g., exclude) the optical layer PP.

[0120] A base substrate BL may be provided on the optical layer PP. The base substrate BL may be a member providing a base surface on which the optical layer PP is provided. The base substrate BL may be a glass substrate, a metal substrate, a plastic substrate, etc. However, the embodiments of the present disclosure are not limited thereto, and the base substrate BL may be an inorganic layer, an organic layer, or an organic-inorganic composite material layer. In some embodiments, unlike the illustrated configuration, in one or more embodiments, the base substrate BL may not be provided (e.g., excluded).

[0121] The display device DD according to one or more embodiments may further include a filling layer. The filling layer may be provided between the display element layer DP-ED and the base substrate BL. The filling layer may be an organic material layer. The filling layer may include at least one of an acrylic-based resin, a silicone-based resin, and an epoxy-based resin (e.g., at least one selected from an acrylic-based resin, a silicone-based resin, and an epoxy-based resin).

[0122] The display panel DP may include a base layer BS, a circuit layer DP-CL provided on the base layer BS, and a display element layer DP-ED. The display element layer DP-ED may include a pixel defining film PDL, light emitting devices ED-1, ED-2, and ED-3 provided between portions of the pixel defining film PDL, and an encapsulation layer TFE provided on the light emitting devices ED-1, ED-2, and ED-3.

[0123] The base layer BS may be a member providing a base surface on which the display element layer DP-ED is provided. The base layer BS may be a glass substrate, a metal substrate, a plastic substrate, etc. However, the embodiment is not limited thereto, and the base layer BS may be an inorganic layer, an organic layer, or an organic-inorganic composite material layer.

[0124] In one or more embodiments, the circuit layer DP-CL is provided on the base layer BS, and the circuit layer DP-CL may include a plurality of transistors. Each of the transistors may include a control electrode, an input electrode, and an output electrode. For example, the circuit layer DP-CL may include a switching transistor and a driving transistor for driving the light emitting devices ED-1, ED-2, and ED-3 of the display element layer DP-ED.

[0125] Each of the light emitting devices ED-1, ED-2 and ED-3 may have a configuration according to Figures 3 to 6 Each of the light-emitting devices ED-1, ED-2 and ED-3 may include a first electrode EL1, a hole transport region HTR, a layer selected from emission layers EML-R, EML-G and EML-B, an electron transport region ETR and a second electrode EL2.

[0126] Figure 2 An embodiment is illustrated in which the emission layers EML-R, EML-G, and EML-B of the light-emitting devices ED-1, ED-2, and ED-3 are provided in the opening OH defined in the pixel defining film PDL, and the hole transport region HTR, the electron transport region ETR, and the second electrode EL2 are provided as one or more common layers in the entire light-emitting devices ED-1, ED-2, and ED-3. However, the embodiments of the present disclosure are not limited thereto, and are different from Figure 2 In the configuration illustrated in the example, the hole transport region HTR and the electron transport region ETR in one or more embodiments can be provided by patterning in the opening OH defined in the pixel definition film PDL. For example, the hole transport region HTR, the emission layers EML-R, EML-G and EML-B, and the electron transport region ETR of the light-emitting devices ED-1, ED-2, and ED-3 in one or more embodiments can be provided by patterning in an inkjet printing method.

[0127] The encapsulation layer TFE may cover the light emitting devices ED-1, ED-2 and ED-3. The encapsulation layer TFE may seal the display element layer DP-ED. The encapsulation layer TFE may be a thin film encapsulation layer. The encapsulation layer TFE may be formed by laminating one or more layers. The encapsulation layer TFE includes at least one insulating layer. The encapsulation layer TFE according to one or more embodiments may include at least one inorganic film (hereinafter, encapsulation inorganic film). The encapsulation layer TFE according to one or more embodiments may also include at least one organic film (hereinafter, encapsulation organic film) and at least one encapsulation inorganic film.

[0128] The encapsulated inorganic film protects the display element layer DP-ED from moisture and / or oxygen, and the encapsulated organic film protects the display element layer DP-ED from foreign substances such as dust particles. The encapsulated inorganic film may include silicon nitride, silicon nitride oxide, silicon oxide, titanium oxide, aluminum oxide, etc., but the embodiments of the present disclosure are not particularly limited thereto. The encapsulated organic film may include an acrylic-based compound, an epoxy-based compound, etc. The encapsulated organic film may include a photopolymerizable organic material, but the embodiments of the present disclosure are not particularly limited thereto.

[0129] An encapsulation layer TFE may be provided on the second electrode EL2 and may be provided to fill the opening OH.

[0130] refer to Figure 1 and Figure 2, the display device DD may include one or more than one non-light emitting areas NPXA, and also include light emitting areas PXA-R, PXA-G, and PXA-B. The light emitting areas PXA-R, PXA-G, and PXA-B may be areas in which light generated by the respective light emitting devices ED-1, ED-2, and ED-3 is emitted. The light emitting areas PXA-R, PXA-G, and PXA-B may be spaced and / or separated from each other on a plane.

[0131] Each of the light-emitting areas PXA-R, PXA-G, and PXA-B may be an area separated by a pixel-defining film PDL. The non-light-emitting area NPXA may be an area between adjacent light-emitting areas PXA-R, PXA-G, and PXA-B, which corresponds to the pixel-defining film PDL. In some embodiments, in the specification, the light-emitting areas PXA-R, PXA-G, and PXA-B may correspond to pixels, respectively. The pixel-defining film PDL may separate the light-emitting devices ED-1, ED-2, and ED-3. The emission layers EML-R, EML-G, and EML-B of the light-emitting devices ED-1, ED-2, and ED-3 may be provided in the opening OH defined in the pixel-defining film PDL and separated from each other.

[0132] The light emitting areas PXA-R, PXA-G, and PXA-B may be divided into a plurality of groups according to the colors of the lights generated by the light emitting devices ED-1, ED-2, and ED-3. Figure 1 and Figure 2 In the display device DD of one or more embodiments illustrated in the embodiment, three light-emitting areas PXA-R, PXA-G and PXA-B that emit red light, green light and blue light, respectively, are exemplarily illustrated. For example, the display device DD of one or more embodiments may include a red light-emitting area PXA-R, a green light-emitting area PXA-G and a blue light-emitting area PXA-B that are separated from each other.

[0133] In a display device DD according to one or more embodiments, a plurality of light-emitting devices ED-1, ED-2, and ED-3 may be intended to emit (e.g., be configured to emit) light beams having wavelengths different from each other. For example, in one or more embodiments, the display device DD may include a first light-emitting device ED-1 that emits red light, a second light-emitting device ED-2 that emits green light, and a third light-emitting device ED-3 that emits blue light. For example, a red light-emitting region PXA-R, a green light-emitting region PXA-G, and a blue light-emitting region PXA-B of the display device DD may correspond to the first light-emitting device ED-1, the second light-emitting device ED-2, and the third light-emitting device ED-3, respectively.

[0134] However, the embodiments of the present disclosure are not limited thereto, and the first to third light emitting devices ED-1, ED-2, and ED-3 may be intended to emit (e.g., configured to emit) light beams in substantially the same wavelength range, or at least one light emitting device may be intended to emit (e.g., configured to emit) a light beam in a wavelength range different from the others. For example, the first to third light emitting devices ED-1, ED-2, and ED-3 may all emit blue light.

[0135] The light emitting areas PXA-R, PXA-G, and PXA-B in the display device DD according to one or more embodiments may be arranged in a stripe form. Figure 1 , a plurality of red light emitting areas PXA-R may be arranged along the second direction axis DR2, a plurality of green light emitting areas PXA-G may be arranged along the second direction axis DR2, and a plurality of blue light emitting areas PXA-B may each be arranged along the second direction axis DR2. In some embodiments, the red light emitting areas PXA-R, the green light emitting areas PXA-G, and the blue light emitting areas PXA-B may be arranged alternately with each other in this order along the first direction axis DR1.

[0136] Figure 1 and Figure 2 It is illustrated that all the light-emitting regions PXA-R, PXA-G, and PXA-B have similar areas, but the embodiments of the present disclosure are not limited thereto. Therefore, the light-emitting regions PXA-R, PXA-G, and PXA-B may have different areas from each other according to the wavelength range of the emitted light. In this case, the areas of the light-emitting regions PXA-R, PXA-G, and PXA-B may refer to the areas when observed on a plane defined by the first direction axis DR1 and the second direction axis DR2 (e.g., in a plan view).

[0137] In some embodiments, the arrangement of the light-emitting areas PXA-R, PXA-G, and PXA-B is not limited to Figure 1 The configuration illustrated in FIG. 1 and the order in which the red light emitting area PXA-R, the green light emitting area PXA-G and the blue light emitting area PXA-B are arranged can be provided in one or more than one suitable combination according to the characteristics of the display quality required in the display device DD. For example, the arrangement form of the light emitting areas PXA-R, PXA-G and PXA-B can be a corrugated tile. Arrangement or diamond (Diamond Pixel TM ) layout form, ( and Diamond Pixel TM is a registered trademark owned by Samsung Display Co., Ltd.

[0138] In some embodiments, the areas of the light-emitting regions PXA-R, PXA-G, and PXA-B may be different from each other. For example, in one or more embodiments, the area of ​​the green light-emitting region PXA-G may be smaller than the area of ​​the blue light-emitting region PXA-B, but the embodiments of the present disclosure are not limited thereto.

[0139] In the following, Figures 3 to 6 is a cross-sectional view schematically showing a light emitting device ED according to one or more embodiments. The light emitting device ED of one or more embodiments may include a first electrode EL1, a hole transport region HTR, an emission layer EML, an electron transport region ETR, and a second electrode EL2 stacked in sequence.

[0140] and Figure 3 compared to, Figure 4 A cross-sectional view of a light emitting device ED according to one or more embodiments is illustrated, wherein the hole transport region HTR includes a hole injection layer HIL and a hole transport layer HTL, and the electron transport region ETR includes an electron injection layer EIL and an electron transport layer ETL. Figure 3 compared to, Figure 5 A cross-sectional view of a light emitting device ED according to one or more embodiments is illustrated, wherein the hole transport region HTR includes a hole injection layer HIL, a hole transport layer HTL, and an electron blocking layer EBL, and the electron transport region ETR includes an electron injection layer EIL, an electron transport layer ETL, and a hole blocking layer HBL. Figure 4 compared to, Figure 6 A cross-sectional view of a light emitting device ED including one or more embodiments of a cover layer CPL provided on the second electrode EL2 is illustrated.

[0141] The first electrode EL1 has conductivity (e.g., is a conductor). The first electrode EL1 may include a metal material, a metal alloy, or a conductive compound (e.g., formed by a metal material, a metal alloy, or a conductive compound). The first electrode EL1 may be an anode or a cathode. However, the embodiments of the present disclosure are not limited thereto. In some embodiments, the first electrode EL1 may be a pixel electrode. The first electrode EL1 may be a transmissive electrode, a semi-transmissive reflective electrode, or a reflective electrode. The first electrode EL1 may include at least one selected from Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF, Mo, Ti, W, In, Sn, and Zn, selected from two or more compounds of these, selected from two or more mixtures of these, or oxides thereof.

[0142] When the first electrode EL1 is a transmissive electrode, the first electrode EL1 may include a transparent metal oxide, such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or indium tin zinc oxide (ITZO). When the first electrode EL1 is a semi-transmissive reflective electrode or a reflective electrode, the first electrode EL1 may include Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, Mo, Ti, W, a compound or a mixture thereof (e.g., a mixture of Ag and Mg); or LiF / Ca (a stacking structure of LiF and Ca) or LiF / Al (a stacking structure of LiF and Al). In some embodiments, the first electrode EL1 may have a multilayer structure, the multilayer structure including a reflective film or a semi-transmissive reflective film including the material described herein (e.g., formed by the material described herein), and a transparent conductive film including ITO, IZO, ZnO, ITZO, etc. (e.g., formed by ITO, IZO, ZnO, ITZO, etc.). For example, the first electrode EL1 may have a three-layer structure of ITO / Ag / ITO, but the embodiments of the present disclosure are not limited thereto. In some embodiments, the embodiments of the present disclosure are not limited thereto, and the first electrode EL1 may include the metal material described herein, a combination of at least two of the metal materials described herein, an oxide of the metal material described herein, etc. The thickness of the first electrode EL1 may be about 1000 Å. to about For example, the thickness of the first electrode EL1 may be about to about

[0143] A hole transport region HTR is provided on the first electrode EL1. The hole transport region HTR may include at least one of a hole injection layer HIL, a hole transport layer HTL, a buffer layer, an emission auxiliary layer, and an electron blocking layer EBL. The thickness of the hole transport region HTR may be, for example, about 100 Å. to about

[0144] The hole transport region HTR may have a single layer including (eg, formed of) a single material, a single layer including (eg, formed of) a plurality of different materials, or a multilayer structure including (eg, formed of) a plurality of layers including (eg, formed of) a plurality of different materials.

[0145] For example, the hole transport region HTR may have a single-layer structure of a hole injection layer HIL or a hole transport layer HTL, or may have a single-layer structure including a hole injection material and a hole transport material (e.g., formed of a hole injection material and a hole transport material). In some embodiments, the hole transport region HTR may have a single-layer structure including a plurality of different materials (e.g., formed of a plurality of different materials), or a structure in which hole injection layer HIL / hole transport layer HTL, hole injection layer HIL / hole transport layer HTL / buffer layer, hole injection layer HIL / buffer layer, hole transport layer HTL / buffer layer, or hole injection layer HIL / hole transport layer HTL / electron blocking layer EBL are sequentially stacked from the first electrode EL1, but the embodiments of the present disclosure are not limited thereto.

[0146] The hole transport region HTR may be formed by using one or more suitable methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) method, inkjet printing, laser printing and / or laser induced thermal imaging (LITI) method.

[0147] The hole transport region HTR may include a compound represented by Formula H-1:

[0148] Formula H-1

[0149]

[0150] In formula H-1, L 1 and L 2 Each of a and b may be independently a direct bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms. a and b may be independently an integer from 0 to 10. In some embodiments, when a or b is an integer of 2 or greater, multiple L 1 and multiple L 2 Each may independently be a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms.

[0151] In formula H-1, Ar 1 and Ar 2 may be each independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms. 3It may be a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms.

[0152] The compound represented by formula H-1 may be a monoamine compound. In some embodiments, the compound represented by formula H-1 may be a diamine compound, wherein Ar 1 To Ar 3 At least one of them contains an amine group as a substituent. In some embodiments, the compound represented by formula H-1 can be 1 and Ar 2 A carbazole-based compound including a substituted or unsubstituted carbazole group in at least one of Ar 1 and Ar 2 A fluorene-based compound including a substituted or unsubstituted fluorene group in at least one of the foregoing.

[0153] The compound represented by Formula H-1 may be represented by any one of the compounds selected from Compound Group H. However, the compounds listed in Compound Group H are examples, and the compound represented by Formula H-1 is not limited to those represented by Compound Group H.

[0154] Compound Group H

[0155]

[0156]

[0157] The hole transport region HTR may include a phthalocyanine compound selected from, for example, copper phthalocyanine; N1, N 1 '-([1,1'-biphenyl]-4,4'-diyl)bis(N 1 -(phenyl-N 4 ,N 4-dimethylphenylbenzene-1,4-diamine) (DNTPD), 4,4',4"-[tri(3-methylphenyl)phenylamino]triphenylamine (m-MTDATA), 4,4',4"-tri(N,N-diphenylamino)triphenylamine (TDATA), 4,4',4"-tri[N-(2-naphthyl)-N-phenylamino]-triphenylamine (2-TNATA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), polyaniline / camphorsulfonic acid (PANI / CSA), polyaniline / poly(4-styrenesulfonate) (PANI / PSS), N,N'-di(naphthalene-l-yl)-N,N'-diphenyl-benzidine (NPB), triphenylamine-containing polyether ketone (TPAPEK), 4-isopropyl-4'-methyldiphenyliodonium [tetrakis(pentafluorophenyl)borate], dipyrazino[2,3-f:2',3'-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (HAT-CN), etc.

[0158] The hole transport region HTR may include at least one selected from carbazole-based derivatives (e.g., N-phenylcarbazole or polyvinylcarbazole), fluorene-based derivatives, triphenylamine-based derivatives (e.g., N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1-biphenyl]-4,4'-diamine (TPD) or 4,4',4"-tri(N-carbazolyl)triphenylamine (TCTA)), N,N'-di(naphthalene-l-yl)-N,N'-diphenyl-benzidine (NPB), 4,4'-cyclohexylenebis[N,N-bis(4-methylphenyl)aniline] (TAPC), 4,4'-bis[N,N'-(3-tolyl)amino]-3,3'-dimethylbiphenyl (HMTPD), 1,3-bis(N-carbazolyl)benzene (mCP), and the like.

[0159] In some embodiments, the hole transport region HTR may include 9-(4-tert-butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole (CzSi), 9-phenyl-9H-3,9'-bicarbazole (CCP), 1,3-bis(1,8-dimethyl-9H-carbazole-9-yl)benzene (mDCP), or the like.

[0160] The hole transport region HTR may include the compound of the hole transport region described herein in at least one of the hole injection layer HIL, the hole transport layer HTL, and the electron blocking layer EBL.

[0161] The thickness of the hole transport region HTR may be about to about For example, about to about When the hole transport region HTR includes the hole injection layer HIL, the hole injection layer HIL may have, for example, about to about When the hole transport region HTR includes the hole transport layer HTL, the hole transport layer HTL may have a thickness of about to about For example, when the hole transport region HTR includes the electron blocking layer EBL, the electron blocking layer EBL may have a thickness of about to about When the thicknesses of the hole transport region HTR, the hole injection layer HIL, the hole transport layer HTL, and the electron blocking layer EBL satisfy the ranges described herein, satisfactory hole transport properties may be achieved without a significant increase in driving voltage.

[0162] In addition to the materials described herein, the hole transport region HTR may further include a charge generating material to increase conductivity. The charge generating material may be uniformly or non-uniformly dispersed in the hole transport region HTR. The charge generating material may be, for example, a p-dopant. The p-dopant may include at least one of a halogenated metal compound, a quinone derivative, a metal oxide, and a cyano group-containing compound, but the embodiments of the present disclosure are not limited thereto. For example, the p-dopant may include a metal halide compound (e.g., CuI or RbI), a quinone derivative (e.g., tetracyanoquinodimethane (TCNQ) or 2,3,5,6-tetrafluoro-7,7',8,8'-tetracyanoquinodimethane (F4-TCNQ)), a metal oxide (e.g., tungsten oxide or molybdenum oxide), a cyano group-containing compound (e.g., dipyrazino[2,3-f:2',3'-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (HAT-CN) or 4-[[2,3-bis[cyano-(4-cyano-2,3,5,6-tetrafluorophenyl)methylene]cyclopropylidene]-cyanomethyl]-2,3,5,6-tetrafluorobenzonitrile (NDP9)), etc., but the embodiments of the present disclosure are not limited thereto.

[0163] As described herein, in addition to the hole injection layer HIL and the hole transport layer HTL, the hole transport region HTR may further include at least one of a buffer layer and an electron blocking layer EBL. The buffer layer may compensate for the resonance distance according to the wavelength of light emitted from the emission layer EML and may thus increase the light emission efficiency. The material that may be included in the hole transport region HTR may be used as the material included in the buffer layer. The electron blocking layer EBL is a layer for preventing or reducing electron injection from the electron transport region ETR to the hole transport region HTR.

[0164] An emission layer EML is provided on the hole transport region HTR. The emission layer EML may have, for example, about to about or about to about The emission layer EML may have a single layer including a single material (eg, formed using a single material), a single layer including a plurality of different materials (eg, formed using a plurality of different materials), or a multilayer structure including a plurality of layers including a plurality of different materials (eg, formed using a plurality of different materials).

[0165] In the light emitting element ED of one or more embodiments, the emission layer EML may include an anthracene derivative, a pyrene derivative, a fluoranthene derivative, Derivatives, dihydrobenzanthracene derivatives or triphenylene derivatives. For example, the emission layer EML may include anthracene derivatives or pyrene derivatives.

[0166] exist Figures 3 to 6 In the light emitting element ED of the embodiment shown in , the emission layer EML may include a host and a dopant.

[0167] The emission layer EML may include a compound represented by any one of Formulas Fa to Fc. The compound represented by Formulas Fa to Fc may be used as a fluorescent dopant material.

[0168] Formula

[0169]

[0170] In the formula Fa, R a To R j The two of them can be independently *-NAr 1 Ar 2 Replace. a To R j Unreacted*-NAr 1 Ar 2 The remainder of the substitution may be independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted amine group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms. -* refers to the position to be connected.

[0171] In *-NAr 1 Ar 2 in Ar 1 and Ar 2 Each of them may be independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms. 1 and Ar 2At least one of may be a heteroaryl group containing O or S as a ring-forming atom.

[0172] Formula Fb

[0173]

[0174] In formula Fb, R a and R b Each may independently be a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms, or may combine with an adjacent group to form a ring. Ar 1 To Ar 4 Each may independently be a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms.

[0175] In Formula Fb, U and V may each independently be a substituted or unsubstituted hydrocarbon ring having 5 to 30 ring carbon atoms or a substituted or unsubstituted heterocyclic ring having 2 to 30 ring carbon atoms. 1 To Ar 4 At least one of may be a heteroaryl group containing O or S as a ring-forming atom.

[0176] In formula Fb, the number of rings represented by U and V can be 0 or 1 independently of each other. For example, in formula Fb, when the number of U or V is 1, a ring forms a fused ring at a specified portion of U or V, and when the number of U or V is 0, there is no ring at a specified portion of U or V. For example, when the number of U is 0 and the number of V is 1, or when the number of U is 1 and the number of V is 0, the fused ring with fluorene core of formula Fb can be a ring compound with four rings. In some embodiments, when the number of U and V is 0 (for example, simultaneously), the fused ring with fluorene core of formula Fb can be a ring compound with three rings. In some embodiments, when the number of U and V is 1 (for example, simultaneously), the fused ring with fluorene core of formula Fb can be a ring compound with five rings.

[0177] Formula Fc

[0178]

[0179] In Formula Fc, A 1 and A 2 can be independently O, S, Se or NR m, and R m It may be a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms. 1 To R 11 Each may independently be a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted amine group, a substituted or unsubstituted boryl group, a substituted or unsubstituted oxy group, a substituted or unsubstituted thiol group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, or may combine with an adjacent group to form a ring.

[0180] In Formula Fc, A 1 and A 2 Each of the substituents may independently combine with the substituents of the adjacent ring to form a fused ring. 1 and A 2 Can be NR independently m When A 1 Can be used with R 4 or R 5 In some embodiments, A 2 Can be used with R 7 or R 8 Combine to form a ring.

[0181] The emission layer EML may include a compound represented by Formula E-1. The compound represented by Formula E-1 may be used as a fluorescent host material.

[0182] Formula E-1

[0183]

[0184] In formula E-1, R 31 To R 40 may each independently be a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted silyl group, a substituted or unsubstituted thiol group, a substituted or unsubstituted oxy 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, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, and / or may combine with an adjacent group to form a ring. In some embodiments, R 31 To R 40Each of may combine with an adjacent group to form a saturated hydrocarbon ring, an unsaturated hydrocarbon ring, a saturated heterocyclic ring, or an unsaturated heterocyclic ring.

[0185] In Formula E-1, "c" and "d" may each independently be an integer of 0 to 5.

[0186] Formula E-1 may be represented by any one selected from Compound E1 to Compound E19.

[0187]

[0188] In one or more embodiments, the emission layer EML may include at least one of a first compound represented by any one of Formula Fa to Formula Fc, a second compound represented by Formula HT-1, a third compound represented by Formula ET-1, and a fourth compound represented by Formula D-1.

[0189] In one or more than one embodiments, the second compound can be used as a hole transport host material of the emission layer EML.

[0190] Formula HT-1

[0191]

[0192] In formula HT-1, A 1 To A 8 Can be N or CR independently 51 For example, A 1 To A 8 All can be CR 51 In some embodiments, A 1 To A 8 Any one of them can be N, and the rest can be CR 51 .

[0193] In formula HT-1, L 1 It may be a direct bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms. 1 It may be a direct bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted divalent biphenyl group, a substituted or unsubstituted divalent carbazole group, etc., but one or more embodiments of the present disclosure are not limited thereto.

[0194] In formula HT-1, Y a Can be direct key, CR 52 R 53 or SiR 54 R 55For example, the two benzene rings connected to the nitrogen atom in formula HT-1 can be connected via a direct bond, In formula HT-1, when Y a When it is a direct bond, the second compound represented by formula HT-1 may include a carbazole moiety. -* refers to the position to be connected.

[0195] In formula HT-1, Ar 1 It may be a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms. 1 It may be a substituted or unsubstituted carbazole group, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted dibenzothiophene group, or a substituted or unsubstituted biphenyl group, etc., but one or more embodiments of the present disclosure are not limited thereto.

[0196] In formula HT-1, R 51 To R 55 and R and R are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted thiol group, a substituted or unsubstituted oxy group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring carbon atoms. In some embodiments, R 51 To R 55 Each of the groups may combine with adjacent groups to form a ring. 51 To R 55 R may each independently be a hydrogen atom or a deuterium atom. 51 To R 55 Each may independently be an unsubstituted methyl group or an unsubstituted phenyl group.

[0197] In one or more embodiments, the second compound represented by Formula HT-1 may be represented by at least one selected from the compounds represented in Compound Group 2. The emission layer EML may include at least one selected from the compounds represented in Compound Group 2 as a hole transport host material.

[0198] Compound Group 2

[0199]

[0200]

[0201]

[0202] In the specific compounds shown in Compound Group 2, "D" refers to a deuterium atom, and "Ph" refers to a substituted or unsubstituted phenyl group. For example, in the compounds shown in Compound Group 2, "Ph" may be an unsubstituted phenyl group.

[0203] In one or more than one embodiments, the emission layer EML may include a third compound represented by Formula ET-1. For example, the third compound may be used as an electron transport host material of the emission layer EML.

[0204] Formula ET-1

[0205]

[0206] In formula ET-1, X 1 To X 3 At least one of them can be N, and X 1 To X 3 The rest of the can be CR 56 For example, X 1 To X 3 Any one of can be N, and X 1 To X 3 The remaining two can each independently be CR 56 In this case, the third compound represented by Formula ET-1 may include a pyridine moiety. In some embodiments, X 1 To X 3 Two of them can be N, and X 1 To X 3 The remaining one can be CR 56 In this case, the third compound represented by Formula ET-1 may include a pyrimidine moiety. In some embodiments, X 1 To X 3 Each (eg, all) may be N. In this case, the third compound represented by Formula ET-1 may include a triazine moiety.

[0207] In formula ET-1, R 56 It may be a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring carbon atoms.

[0208] In Formula ET-1, b1 to b3 may each independently be an integer of 0 to 10.

[0209] In formula ET-1, Ar 2To Ar 4 Each of them may be independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms. 2 To Ar 4 It may be a substituted or unsubstituted phenyl group or a substituted or unsubstituted carbazole group.

[0210] In formula ET-1, L 2 To L 4 and L may be independently a direct bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms. 2 To L 4 Each may independently be a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms.

[0211] In one or more embodiments, the third compound may be represented by at least one compound selected from compound group 3. The light-emitting element ED of one or more embodiments may include at least one compound selected from compound group 3.

[0212] Compound Group 3

[0213]

[0214]

[0215]

[0216] In the compounds shown in Compound Group 3, "D" refers to a deuterium atom, and "Ph" refers to an unsubstituted phenyl group.

[0217] The emission layer EML includes a second compound and a third compound, and the second compound and the third compound can form an exciplex. In the emission layer EML, an exciplex can be formed by a hole transport host and an electron transport host. In this case, the triplet energy level of the exciplex formed by the hole transport host and the electron transport host can correspond to the energy level difference between the lowest unoccupied molecular orbital (LUMO) energy level of the electron transport host and the highest occupied molecular orbital (HOMO) energy level of the hole transport host.

[0218] For example, the absolute value of the triplet energy level (T1) of the exciplex formed by the hole transport host and the electron transport host can be about 2.4 electron volts (eV) to about 3.0 eV. In some embodiments, the triplet energy level of the exciplex can be less than the energy gap of each host material. The exciplex can have a triplet energy level of about 3.0 eV or less than 3.0 eV, which can be the energy gap between the hole transport host and the electron transport host.

[0219] In one or more embodiments, the emission layer EML may include a fourth compound in addition to the first to third compounds. The fourth compound may be used as a phosphorescence sensitizer of the emission layer EML. Energy transfer from the fourth compound to the first compound may occur to emit light.

[0220] For example, the emission layer EML may include an organic metal complex as the fourth compound, wherein the organic metal complex includes platinum (Pt) as a central metal atom and a ligand bonded to the central metal atom. In one or more embodiments of the light-emitting element ED, the emission layer EML may include a compound represented by formula D-1 as the fourth compound.

[0221] Formula D-1

[0222]

[0223] In formula D-1, Q 1 To Q 4 can each independently be C or N.

[0224] In Formula D-1, C1 to C4 may each independently be a substituted or unsubstituted hydrocarbon ring having 5 to 30 ring carbon atoms or a substituted or unsubstituted heterocyclic ring having 2 to 30 ring carbon atoms.

[0225] In formula D-1, L 11 To L 13 Can be directly connected, *-O-*, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms. 11 To L 13 In the above, “—*” refers to the part connecting to C1 to C4.

[0226] In formula D-1, b1 to b3 may each independently be 0 or 1. When b1 is 0, C1 and C2 may not be connected to each other. When b2 is 0, C2 and C3 may not be connected to each other. When b3 is 0, C3 and C4 may not be connected to each other.

[0227] In formula D-1, R 61 To R 66 and R and R are each independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted thiol group, a substituted or unsubstituted oxy group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring carbon atoms. In some embodiments, R 61 To R 66 Each of R may be connected to an adjacent group to form a ring. 61 To R 66 Each may independently be a substituted or unsubstituted methyl group, or a substituted or unsubstituted tert-butyl group.

[0228] In Formula D-1, d1 to d4 may each independently be an integer of 0 to 4. In Formula D-1, when d1 to d4 are 0, the fourth compound may be unreacted by R 61 To R 64 wherein d1 to d4 are 4 and R 61 To R 64 The case where d1 to d4 are hydrogen atoms may be the same as the case where d1 to d4 are 0, respectively. When d1 to d4 are integers of 2 or more, a plurality of R 61 To multiple R 64 Each can be the same, or multiple R 61 To multiple R 64 At least one of the respective ones may be different.

[0229] In Formula D-1, C1 to C4 may each independently be a substituted or unsubstituted hydrocarbon ring or a substituted or unsubstituted heterocyclic ring represented by any one of C-1 to C-4.

[0230]

[0231] In C-1 to C-4, P 1 Can be C-* or CR 74 , P 2 Can be N-* or NR 81 , P 3 Can be N-* or NR 82 , and P 4 Can be C-* or CR 88 . R 71 To R 88They may each independently be a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, or may combine with adjacent atoms to form a ring.

[0232] In C-1 to C-4, is the part connected to the Pt central metal atom, and “-*” corresponds to the part connected to the adjacent ring group (C1 to C4) or the linker (L 11 To L 13 ) connected part.

[0233] The emission layer EML of one or more embodiments may include a first compound as a fused polycyclic compound, and at least one of the second compound to the fourth compound. For example, the emission layer EML may include a first compound, a second compound, and a third compound. In the emission layer EML, the second compound and the third compound may form an exciplex, and energy transfer from the exciplex to the first compound may occur to emit light.

[0234] In some embodiments, the emission layer EML may include a first compound, a second compound, a third compound, and a fourth compound. In the emission layer EML, the second compound and the third compound may form an exciplex, and energy transfer from the exciplex to the fourth compound and the first compound may occur to emit light. In one or more embodiments, the fourth compound may be a sensitizer. In the light-emitting element ED of one or more embodiments, the fourth compound contained in the emission layer EML may play the role of a sensitizer and play the role of transferring energy from the host to the first compound as a light-emitting dopant. For example, the fourth compound acting as an auxiliary dopant can accelerate the energy transfer to the first compound as a light-emitting dopant, and can increase the emission ratio of the first compound. Therefore, the emission layer EML of one or more embodiments can improve the emission efficiency. In some embodiments, when the energy transfer to the first compound increases, the excitons formed in the emission layer EML may not accumulate in the emission layer EML, but can quickly emit light, and the degradation of the element can be reduced. Therefore, the life of the light-emitting element ED of one or more embodiments can be increased.

[0235] The light-emitting element ED of one or more embodiments may include (e.g., all) the first compound, the second compound, the third compound, and the fourth compound, and the emission layer EML may include a combination of two host materials and two dopant materials. In the light-emitting element ED of one or more embodiments, the emission layer EML may include in parallel (e.g., simultaneously) the second compound and the third compound as two different hosts, the first compound emitting delayed fluorescence, and the fourth compound including an organic metal complex, and may show excellent or suitable emission efficiency properties.

[0236] In one or more embodiments, the fourth compound represented by Formula D-1 may be represented by at least one selected from the compounds represented in Compound Group 4. The emission layer EML may include at least one selected from the compounds represented in Compound Group 4 as a sensitizer material.

[0237] Compound Group 4

[0238]

[0239]

[0240] In the compounds shown in Compound Group 4, "D" refers to a deuterium atom.

[0241] In the light-emitting element ED of one or more embodiments, when the emission layer EML includes (e.g., all) the first compound, the second compound, and the third compound, the content (e.g., amount) of the first compound can be about 0.1wt% to about 5wt% based on the total weight of the first compound, the second compound, and the third compound. However, one or more embodiments of the present disclosure are not limited thereto. When the content (e.g., amount) of the first compound satisfies the ratio described herein, the energy transfer from the second compound and the third compound to the first compound can be increased, and thus the emission efficiency and the element life can be increased.

[0242] In the emission layer EML, the content (e.g., amount) of the second compound and the third compound may be the remainder excluding the weight of the first compound. For example, in the emission layer EML, the content (e.g., amount) of the second compound and the third compound may be about 65 wt % to about 99 wt % based on the total weight of the first compound, the second compound, and the third compound.

[0243] A weight ratio of the second compound to the third compound may be about 3:7 to about 7:3 in the total weight of the second compound and the third compound.

[0244] When the second compound and the third compound satisfy the content (e.g., amount) ratio described herein, the charge balance property in the emission layer EML can be improved, and the emission efficiency and the element life can be increased. When the content (e.g., amount) of the second compound and the third compound deviates from the ratio range described herein, the charge balance in the emission layer EML can be destroyed, the emission efficiency may be degraded, and the element may be easily degraded.

[0245] When the emission layer EML includes a fourth compound, the content (e.g., amount) of the fourth compound may be about 10 wt% to about 30 wt% based on the total weight of the first compound, the second compound, the third compound, and the fourth compound in the emission layer EML. However, one or more embodiments of the present disclosure are not limited thereto. When the content (e.g., amount) of the fourth compound satisfies the content (e.g., amount) described herein, energy transfer from the host to the first compound as a light-emitting dopant may be increased, and the emission ratio may be increased. Therefore, the emission efficiency of the emission layer EML may be improved. When the first compound, the second compound, the third compound, and the fourth compound contained in the emission layer EML satisfy the content (e.g., amount) ratio described herein, excellent or suitable emission efficiency and long life may be achieved.

[0246] In one or more than one embodiments, the emission layer EML may include a compound represented by Formula E-2a or Formula E-2b. The compound represented by Formula E-2a or Formula E-2b may be used as a phosphorescent host material.

[0247] Formula E-2a

[0248]

[0249] In formula E-2a, "a" may be an integer from 0 to 10, and La may be a direct bond, a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring-forming carbon atoms. In some embodiments, when "a" is an integer of 2 or greater, multiple La may each independently be a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms or a substituted or unsubstituted heteroarylene group having 2 to 30 ring-forming carbon atoms.

[0250] In some embodiments, in Formula E-2a, A 1 To A 5 R may be independently N or CRi. a To R iEach may independently be a hydrogen atom, a deuterium atom, a substituted or unsubstituted amine group, a substituted or unsubstituted thiol group, a substituted or unsubstituted oxy group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, or may combine with an adjacent group to form a ring. a To R i Each of may combine with an adjacent group to form a hydrocarbon ring or a heterocyclic ring containing N, O, S, etc. as a ring-constituting atom.

[0251] In some embodiments, in Formula E-2a, selected from A 1 To A 5 Two or three of them can be N, and A 1 To A 5 The remainder can be CR i .

[0252] Formula E-2b

[0253]

[0254] In Formula E-2b, Cbz1 and Cbz2 may each independently be an unsubstituted carbazole group or a carbazole group substituted with an aryl group having 6 to 30 ring carbon atoms. b It may be a direct bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms. "b" is an integer from 0 to 10, and when "b" is an integer of 2 or more, multiple L b Each may independently be a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms.

[0255] The compound represented by Formula E-2a or Formula E-2b may be represented by at least one of the compounds selected from Compound Group E-2. However, the compounds listed in Compound Group E-2 are merely exemplified, and the compounds represented by Formula E-2a or Formula E-2b are not limited to the compounds presented in Compound Group E-2.

[0256] Compound Group E-2

[0257]

[0258]

[0259] The emission layer EML may further include a commonly used material that is very suitable in the art as a host material. For example, the emission layer EML may include bis(4-(9H-carbazole-9-yl)phenyl)diphenylsilane (BCPDS), (4-(1-(4-(diphenylamino)phenyl)cyclohexyl)phenyl)diphenyl-phosphine oxide (POPCPA), bis[2-(diphenylphosphino)phenyl]ether oxide (DPEPO), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), 1,3-bis(N-carbazolyl)benzene (m At least one of CP, 2,8-bis(diphenylphosphoryl)dibenzo[b,d]furan (PPF), 4,4',4"-tri(carbazole-9-yl)-triphenylamine (TCTA) and 1,3,5-tri(1-phenyl-1H-benzo[d]imidazol-2-yl)benzene (TPBi) is used as a host material. However, one or more embodiments of the present disclosure are not limited thereto. For example, tri(8-hydroxyquinolinolato)aluminum (Alq 3 ), 9,10-di(naphthalene-2-yl)anthracene (ADN), 2-tert-butyl-9,10-di(naphthalene-2-yl)anthracene (TBADN), distyryl arylide (DSA), 4,4'-bis(9-carbazolyl)-2,2'-dimethyl-biphenyl (CDBP), 2-methyl-9,10-bis(naphthalene-2-yl)anthracene (MADN), hexaphenylcyclotriphosphazene (CP1), 1,4-bis(triphenylsilyl)benzene (UGH2), hexaphenylcyclotrisiloxane (DPSiO 3 ), octaphenylcyclotetrasiloxane (DPSiO 4 ) etc. can be used as the main material.

[0260] The emission layer EML may include a compound represented by Formula Ma. The compound represented by Formula Ma may be used as a phosphorescent dopant material.

[0261] Formula Ma

[0262]

[0263] In formula Ma, Y 1 To Y 4 and Z 1 To Z 4 Can be CR independently 1 or N, and R 1 To R 4Each of the above may be independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted amine group, a substituted or unsubstituted thiol group, a substituted or unsubstituted oxy group, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, or may be combined with an adjacent group to form a ring. In formula Ma, "m" is 0 or 1, and "n" is 2 or 3. In formula Ma, when "m" is 0, "n" is 3, or when "m" is 1, "n" is 2.

[0264] The compound represented by the formula Ma may be used as a phosphorescent dopant.

[0265] The compound represented by formula Ma may be represented by at least one selected from compound M-a1 to compound M-a25. However, compound M-a1 to compound M-a25 are exemplified, and the compound represented by formula Ma is not limited to the compounds represented by compound M-a1 to compound M-a25.

[0266]

[0267]

[0268] In one or more embodiments, the emission layer EML may include a styrene derivative (e.g., 1,4-bis[2-(3-N-ethylcarbazolyl)vinyl]benzene (BCzVB), 4-(di-p-tolylamino)-4'-[(di-p-tolylamino)styrene]phenylene (DPAVB), N-(4-((E)-2-(6-((E)-4-(diphenylamino)styrene)naphthalene-2-yl)vinyl) At least one of 2-(4-(N,N-diphenylamino)phenyl)vinyl]biphenyl (DPAVBi)), perylene and its derivatives (e.g., 2,5,8,11-tetra-tert-butylperylene (TBP)), pyrene and its derivatives (e.g., 1,1'-dipyrene, 1,4-dipyrenylbenzene and 1,4-bis(N,N-diphenylamino)pyrene), etc. can be used as suitable dopant materials.

[0269] The emission layer EML may include a suitable phosphorescent dopant material. For example, the phosphorescent dopant may use a metal complex including iridium (Ir), platinum (Pt), osmium (Os), gold (Au), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb) or thulium (Tm). For example, bis(4,6-difluorophenylpyridinyl-N,C2') iridium (III) picolinate (FIrpic), bis(2,4-difluorophenylpyridinyl)-tetra(1-pyrazolyl) borate iridium (III) (FIr6) or octaethylporphyrin platinum (PtOEP) may be used as a phosphorescent dopant. However, one or more embodiments of the present disclosure are not limited thereto.

[0270] The emission layer EML may include a quantum dot material. The core of the quantum dot may be selected from II-VI group compounds, III-VI group compounds, I-III-VI group compounds, III-V group compounds, III-II-V group compounds, IV-VI group compounds, IV group elements, IV group compounds, and combinations thereof.

[0271] The II-VI compound may be selected from the group consisting of a binary compound selected from the group consisting of CdSe, CdTe, CdS, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and mixtures thereof; a ternary compound selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZ nSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof; and a quaternary compound selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and mixtures thereof.

[0272] The III-VI compounds may include binary compounds (e.g. In 2 S 3 andIn 2 Se 3 ), ternary compounds (such as InGaS 3 and InGaSe 3 ), or any one or more combinations thereof.

[0273] The I-III-VI group compound may be selected from: a ternary compound selected from AgInS, AgInS2 、CuInS、CuInS 2 、AgGaS 2 、CuGaS 2 、CuGaO 2 、AgGaO 2 、AgAlO 2 and mixtures thereof; or quaternary compounds such as AgInGaS 2 and / or CuInGaS 2 .

[0274] The III-V compound may be selected from the group consisting of: a binary compound selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and a mixture thereof; a ternary compound selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, InPSb and a mixture thereof; and a quaternary compound selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and a mixture thereof. In some embodiments, the III-V group compound may further include a II group metal. For example, InZnP or the like may be selected as the III-II-V group compound.

[0275] The IV-VI compound may be selected from the group consisting of: a binary compound selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof; a ternary compound selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof; and a quaternary compound selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof. The IV group element may be selected from the group consisting of Si, Ge, and mixtures thereof. The IV group compound may be a binary compound selected from the group consisting of SiC, SiGe, and mixtures thereof.

[0276] In some embodiments, multi-component compounds (e.g., binary compounds, ternary compounds, and / or quaternary compounds) may be present in a particle in a substantially uniform concentration or in a substantially non-uniform concentration. For example, the chemical formulas described herein may refer to the types (species) of elements included, and the atomic ratios in the compounds may vary. For example, AgInGaS 2 Can refer to AgIn x Ga 1-x S 2 (x is a real number between 0 and 1).

[0277] In some embodiments, the quantum dot may have a single structure in which the concentration of each element contained in the quantum dot is substantially uniform, or a core-shell dual structure. For example, the material contained in the core and the material contained in the shell may be different from each other.

[0278] The shell of the quantum dot may be (for example, acting as a protective layer for preventing or reducing the chemical denaturation of the core to maintain semiconductor properties and / or a charging layer for imparting electrophoretic properties to the quantum dot) a protective layer for preventing or reducing the chemical denaturation of the core to maintain semiconductor properties and / or a charging layer for imparting electrophoretic properties to the quantum dot. The shell may have a single layer or multiple layers. The interface of the core and the shell may have a concentration gradient in which the concentration of the element present in the shell decreases toward the center.

[0279] In some embodiments, the quantum dot may have a core-shell dual structure as described herein, comprising a core containing nanocrystals and a shell encapsulating the core. Examples of the shell of the quantum dot may include metal or nonmetal oxides, semiconductor compounds, or combinations thereof.

[0280] For example, metal oxides or non-metal oxides may include binary compounds (e.g., SiO 2 、Al 2 O 3 、TiO 2 、ZnO、MnO、Mn 2 O 3 , Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 and / or NiO); or ternary compounds (such as MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 and / or CoMn2 O 4 ), but one or more embodiments of the present disclosure are not limited thereto.

[0281] In addition, the semiconductor compounds may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, etc., but one or more embodiments of the present disclosure are not limited to this.

[0282] Polyvalent compounds (e.g., binary compounds and / or ternary compounds) may be present in the particles in substantially uniform concentrations or substantially non-uniform concentrations. For example, the chemical formulas described herein may refer to the types (species) of elements included, and the atomic ratios in the compounds may be different.

[0283] The quantum dots can have a full width at half maximum (FWHM) of an emission wavelength spectrum of about 45 nm or less, about 40 nm or less, or about 30 nm or less. Within this range, color purity or color reproducibility can be improved. In some embodiments, light emitted via such quantum dots is emitted in all directions, and light viewing angle properties can be improved.

[0284] In some embodiments, the shape of the quantum dots can be a shape commonly used in the art without particular limitation. More specifically, spherical, pyramidal, multi-armed or cubic nanoparticles, nanotubes, nanowires, nanofibers or nanoplates can be used.

[0285] By controlling the size of the quantum dots or by controlling the ratio of elements in the quantum dots, the band gap can be controlled or selected, and one or more suitable light bands can be obtained from the quantum dot emission layer. Therefore, by utilizing such quantum dots (using quantum dots with different sizes or controlling the ratio of elements in the quantum dot compound differently), a light-emitting element that emits one or more suitable wavelengths of light can be realized. For example, the size of the quantum dots or the ratio of elements in the quantum dot compound can be controlled or selected to emit red light, green light, and / or blue light. In some embodiments, quantum dots can be provided to emit white light in combination with one or more suitable emission colors.

[0286] exist Figures 3 to 6 In the light emitting element ED of the embodiment shown in , an electron transport region ETR is provided on the emission layer EML. The electron transport region ETR may include at least one of a hole blocking layer HBL, an electron transport layer ETL, and an electron injection layer EIL. However, one or more embodiments of the present disclosure are not limited thereto.

[0287] The electron transport region ETR may have a single layer including a single material (e.g., formed using a single material), a single layer including a plurality of different materials (e.g., formed using a plurality of different materials), or a multilayer structure having a plurality of layers including a plurality of different materials (e.g., formed using a plurality of different materials).

[0288] For example, the electron transport region ETR may have a single-layer structure of an electron injection layer EIL or an electron transport layer ETL, or a single-layer structure including an electron injection material and an electron transport material (e.g., formed using an electron injection material and an electron transport material). In addition, the electron transport region ETR may have a single-layer structure including a plurality of different materials (e.g., formed using a plurality of different materials), or a structure of an electron transport layer ETL / electron injection layer EIL, or a hole blocking layer HBL / electron transport layer ETL / electron injection layer EIL stacked from an emission layer EML, without limitation. The thickness of the electron transport region ETR may be, for example, about 100 Å. to about

[0289] The electron transport region ETR may be formed by using one or more suitable methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) method, inkjet printing, laser printing and / or laser induced thermal imaging (LITI) method.

[0290] The light emitting element ED according to one or more embodiments of the present disclosure includes at least one functional layer provided between the first electrode EL1 and the second electrode EL2, and the at least one functional layer may include a compound represented by Formula 1. In the light emitting element ED of one or more embodiments, the electron transport region ETR may include a compound represented by Formula 1. For example, in the electron transport region ETR of one or more embodiments, the electron transport layer ETL may include a compound represented by Formula 1.

[0291] The compound of one or more embodiments can include a core structure in which two phenylene groups are connected via a cycloalkyl group. The compound of one or more embodiments can (for example, simultaneously) include a phosphine oxide group and a triazine group, and the phosphine oxide group and the triazine group are combined with the core structure. For example, the phosphine oxide group can be bonded to a phenyl group in the core structure, and can be connected to the phenylene group of the core structure via a linker. In some embodiments, the triazine group can be directly bonded to another phenylene group of the core structure.

[0292] The compound of one or more than one embodiment may be represented by Formula 1.

[0293] Formula 1

[0294]

[0295] In Formula 1, Cy may be a substituted or unsubstituted cycloalkyl group having 3 to 30 ring carbon atoms. For example, Cy may be an unsubstituted cycloalkyl group having 3 to 10 ring carbon atoms. For example, Cy may be an unsubstituted cyclohexyl group, an unsubstituted bicyclohexyl group, or an unsubstituted adamantyl group.

[0296] In Formula 1, L may be a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms or a substituted or unsubstituted heteroarylene group having 2 to 30 ring-forming carbon atoms. For example, L may be an unsubstituted arylene group having 6 to 15 ring-forming carbon atoms. For example, L may be an unsubstituted phenylene group, an unsubstituted naphthalene group, or an unsubstituted anthracene group.

[0297] In formula 1, R 1 To R 4 Each may independently be a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms. 1 To R 4 Each can be the same, or R 1 To R 4 At least one of may be different from the others.

[0298] For example, R 1 and R 2 Each of R and R may be independently an unsubstituted alkyl group having 1 to 4 carbon atoms, or an unsubstituted aryl group having 6 to 10 ring carbon atoms. 1 and R 2 R and R are each independently an unsubstituted methyl group or an unsubstituted phenyl group. 1 and R 2 can be the same or different from each other. For example, R 1 and R 2 It can be an unsubstituted methyl group or an unsubstituted phenyl group. In some embodiments, R 1 and R 2 Either one of them may be an unsubstituted methyl group, and the other may be an unsubstituted phenyl group.

[0299] In some embodiments, in particular, R 3 and R 4Each of them may be independently a substituted or unsubstituted aryl group having 6 to 20 ring carbon atoms. 3 and R 4 and R are each independently an unsubstituted phenyl group, an unsubstituted biphenyl group, an unsubstituted terphenyl group, an unsubstituted naphthyl group, or a substituted or unsubstituted anthracenyl group. 3 and R 4 When it is a substituted anthracenyl group, R 3 and R 4 Each of R may be an anthracenyl group substituted with a phenyl group. In one or more than one embodiment, R 3 and R 4 to be the same as or different from each other.

[0300] In formula 1, R a and R b Each of R and R may independently be a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted thiol group, a substituted or unsubstituted oxy group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms, or combine with an adjacent group to form a ring. In one or more embodiments, R a and R b can be the same. For example, R a and R b Both (eg, simultaneously) may be hydrogen atoms.

[0301] In Formula 1, "a" and "b" may each independently be an integer of 0 to 4. The case where "a" is 0 may be the same as the case where "a" is 4 and all R a When "a" is an integer of 2 or more, two or more R a The case where "b" is 0 can be the same as the case where "b" is 4 and all R b When "b" is an integer of 2 or more, two or more R b may be the same or at least one may be different from the others.

[0302] In Formula 1, "l" may be 1 or 2. When "l" is 1, L may be bonded to -P(=O)R 1 R 2 When "l" is 2, two L's may be bonded to each other, and one L may be bonded to -P(=O)R1 R 2 , and the other L may be bonded to the phenylene group of Formula 1. When "l" is 2, the two Ls may be different from each other, for example, each of the two Ls may be an unsubstituted phenylene group and an unsubstituted anthracene group. In this case, the unsubstituted phenylene group and the unsubstituted anthracene group may be bonded to each other, and the unsubstituted phenylene group may be bonded to -P(=O)R of Formula 1. 1 R 2 , and the unsubstituted anthracene group may be bonded to the phenylene group of Formula 1.

[0303] Formula 1 may be represented by any one of Formula 1-1a to Formula 1-1c.

[0304] Formula 1-1a

[0305]

[0306] Formula 1-1b

[0307]

[0308] Formula 1-1c

[0309]

[0310] Formula 1-1a to Formula 1-1c represent Formula 1 in which Cy is specifically specified. Formula 1-1a represents the case in which Cy is an unsubstituted cyclohexyl group, Formula 1-1b represents the case in which Cy is an unsubstituted bicycloheptyl group, and Formula 1-1c represents the case in which Cy is an unsubstituted adamantyl group.

[0311] In Formula 1-1a to Formula 1-1c, L, R 1 To R 4 , R a , R b , "a", "b" and "l" may each independently be defined as in Formula 1.

[0312] Formula 1 may be represented by Formula 1-2a or Formula 1-2b.

[0313] Formula 1-2a

[0314]

[0315] Formula 1-2b

[0316]

[0317] Formula 1-2a and Formula 1-2b represent the case where the position where L is bonded to the phenylene group is specifically specified. In Formula 1-2a, L is bonded to the phenylene group at the para position relative to Cy, and in Formula 1-2b, L is bonded to the phenylene group at the meta position relative to Cy.

[0318] In Formula 1-2a to Formula 1-2b, Cy, L, R 1 To R 4 , R a , R b , "a", "b" and "l" may each independently be defined as in Formula 1.

[0319] The compound represented by Formula 1 may be represented by at least one compound selected from compound group 1. The light-emitting element ED of one or more embodiments may include at least one compound selected from the compounds in compound group 1. For example, the light-emitting element ED of one or more embodiments may include at least one compound selected from the compounds in compound group 1 in the electron transport region ETR. For example, the light-emitting element ED of one or more embodiments may include at least one compound selected from the compounds in compound group 1 in the electron transport layer ETL.

[0320] Compound Group 1

[0321]

[0322]

[0323]

[0324]

[0325]

[0326]

[0327]

[0328]

[0329]

[0330]

[0331]

[0332]

[0333]

[0334]

[0335]

[0336]

[0337]

[0338]

[0339]

[0340]

[0341]

[0342]

[0343]

[0344]

[0345]

[0346]

[0347]

[0348]

[0349]

[0350]

[0351]

[0352]

[0353]

[0354]

[0355]

[0356]

[0357]

[0358] The compound represented by Formula 1 according to one or more embodiments of the present disclosure may include a core structure in which two phenylene groups are connected via a cycloalkyl group. In the compound represented by Formula 1, because the two phenylene groups are connected via a cycloalkyl group, the conjugated structure of each of the two phenylene groups may be interrupted (i.e., unconnected or discontinuous). Therefore, the compound of one or more embodiments may have a (e.g., relatively) high triplet energy level, and may prevent or reduce the quenching of excitons generated in the emission layer EML in the electron transport region ETR (e.g., electron transport layer ETL).

[0359] In some embodiments, the compound represented by Formula 1 according to one or more embodiments may (for example, simultaneously) include both phosphine oxide groups and triazine groups bonded to the core structure. For example, the phosphine oxide group may be bonded to a phenylene group of the core structure, and may be bonded to the phenylene group of the core structure via a connector. In some embodiments, the triazine group may be directly bonded to another phenylene group of the core structure. The compound represented by Formula 1 of one or more embodiments (for example, simultaneously) includes both phosphine oxide groups and triazine groups, and the phosphine oxide groups and triazine groups are used as substituents in parallel (for example, simultaneously), and may exhibit (for example, show) (for example, relatively) high charge transport capabilities.

[0360] The light-emitting element ED according to one or more embodiments of the present disclosure includes a compound represented by Formula 1 and can exhibit (e.g., show) element properties of low driving voltage, high emission efficiency, and long life. For example, the compound represented by Formula 1 is included in the electron transport region ETR (e.g., the electron transport layer ETL) and can contribute to the improvement of the emission layer and the increase of the life of the light-emitting element ED.

[0361] The display devices DD, DD-TD, DD-a, DD-b, and DD-c according to the embodiments of the present disclosure (see Figure 1 , Figure 2 and Figures 8 to 11 ) includes a light emitting element ED including the compound represented by Formula 1, and can exhibit (eg, show) excellent or suitable display quality.

[0362] The electron transport region ETR may include a compound represented by Formula ET-2.

[0363] Formula ET-2

[0364]

[0365] In formula ET-2, X 1 To X 3At least one of them can be N, and X 1 To X 3 The rest of the can be CR a . R a It may be a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms. 1 To Ar 3 Each may independently be a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms.

[0366] In Formula ET-2, "a" to "c" may each independently be an integer from 0 to 10. In Formula ET-2, L 1 To L 3 and L may each independently be a direct bond, a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms. In some embodiments, when "a" to "c" are integers of 2 or more, L 1 To L 3 Each may independently be a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms.

[0367] The electron transport region ETR may include an anthracene-based compound. However, one or more embodiments of the present disclosure are not limited thereto, and the electron transport region ETR may include, for example, tris(8-hydroxyquinolinolato)aluminum (Alq 3), 1,3,5-tris[(3-pyridyl)-phenyl-3-yl]benzene, 2,4,6-tris(3'-(pyridin-3-yl)biphenyl-3-yl)-1,3,5-triazine, 2-(4-(N-phenylbenzimidazol-1-yl)phenyl)-9,10-dinaphthylanthracene, 1,3,5-tris(1-phenyl-1H-benzo[d]imidazol-2-yl)benzene (TPBi), 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bp hen), 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ), 4-(naphthalen-1-yl)-3,5-diphenyl-4H-1,2,4-triazole (NTAZ), 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (tBu-PBD), bis(2-methyl-8-quinolinolato-N1,O8)-(1,1'-biphenyl-4-ato)aluminum (BAlq), bis(benzoquinolinolato-10-atoberyllium) (Bebq 2 ), 9,10-di(naphthalene-2-yl)anthracene (ADN), 1,3-bis[3,5-di(pyridin-3-yl)phenyl]benzene (BmPyPhB) and / or mixtures thereof, without limitation.

[0368] The electron transport region ETR may include at least one selected from the group consisting of compounds ET1 to ET36.

[0369]

[0370]

[0371]

[0372] In some embodiments, the electron transport region ETR may include a metal halide (e.g., LiF, NaCl, CsF, RbCl, RbI, CuI, and KI), a lanthanide metal (e.g., Yb), or a co-deposited material of a metal halide and a lanthanide metal. For example, the electron transport region ETR may include KI:Yb, RbI:Yb, LiF:Yb, etc. as a co-deposited material. In some embodiments, the electron transport region ETR may use a metal oxide (e.g., Li 2 O and BaO) or 8-hydroxy-quinoline lithium (Liq). However, one or more embodiments of the present disclosure are not limited thereto. The electron transport region ETR can also be formed using a mixture material of an electron transport material and an insulating organic metal salt. The organic metal salt can be a material having a band gap of about 4 eV or greater than 4 eV. Examples of organic metal salts may include, for example, metal acetates, metal benzoates, metal acetoacetates, metal acetylacetonates and / or metal stearates.

[0373] In addition to the above materials, the electron transport region ETR may include at least one of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), diphenyl(4-(triphenylsilyl)phenyl)phosphine oxide (TSPO1) and 4,7-diphenyl-1,10-phenanthroline (Bphen). However, one or more embodiments of the present disclosure are not limited thereto.

[0374] The electron transport region ETR may include a compound of the electron transport region in at least one of the electron injection layer EIL, the electron transport layer ETL, and the hole blocking layer HBL.

[0375] When the electron transport region ETR includes the electron transport layer ETL, the thickness of the electron transport layer ETL may be about to about For example, about to about When the thickness of the electron transport layer ETL satisfies the range described herein, satisfactory electron transport properties can be obtained without a significant increase in driving voltage. When the electron transport region ETR includes the electron injection layer EIL, the thickness of the electron injection layer EIL can be about 1000 Å. to about For example, about to about When the thickness of the electron injection layer EIL satisfies the range described herein, satisfactory electron injection properties may be obtained without causing a significant increase in driving voltage.

[0376] The second electrode EL2 is provided on the electron transport region ETR. The second electrode EL2 may be a common electrode. The second electrode EL2 may be a cathode or an anode, but the embodiments of the present disclosure are not limited thereto. For example, when the first electrode EL1 is an anode, the second electrode EL2 may be a cathode, and when the first electrode EL1 is a cathode, the second electrode EL2 may be an anode.

[0377] The second electrode EL2 may be a transmissive electrode, a semi-transmissive reflective electrode or a reflective electrode. When the second electrode EL2 is a transmissive electrode, the second electrode EL2 may include (e.g., be formed of) a transparent metal oxide such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO), etc.

[0378] When the second electrode EL2 is a semi-transmissive reflective electrode or a reflective electrode, the second electrode EL2 may include Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, Mo, Ti, Yb, W, or a compound or mixture thereof (e.g., AgMg, AgYb, or MgYb); or LiF / Ca or LiF / Al. In some embodiments, the second electrode EL2 may have a multilayer structure including a reflective film or a semi-transmissive reflective film including a material described herein (e.g., formed of a material described herein), and a transparent conductive film including ITO, IZO, ZnO, ITZO, etc. (e.g., formed of ITO, IZO, ZnO, ITZO, etc.). For example, the second electrode EL2 may include a metal material described herein, a combination of at least two of the metal materials described herein, an oxide of the metal material described herein, etc.

[0379] In some embodiments, the second electrode EL2 may be connected to an auxiliary electrode. When the second electrode EL2 is connected to the auxiliary electrode, the resistance of the second electrode EL2 may be reduced.

[0380] In some embodiments, a cover layer CPL may be further provided on the second electrode EL2 of the light emitting device ED of one or more embodiments. The cover layer CPL may include a plurality of layers or a single layer.

[0381] In one or more embodiments, the capping layer CPL may be an organic layer or an inorganic layer. For example, when the capping layer CPL comprises an inorganic material, the inorganic material may include an alkali metal compound (e.g., LiF), an alkaline earth metal compound (e.g., MgF 2 )、SiON、SiN x , SiOy, etc.

[0382] For example, when the capping layer CPL includes an organic material, the organic material may include α-NPD, NPB, TPD, m-MTDATA, Alq 3 , CuPc, N4,N4,N4',N4'-tetrakis(biphenyl-4-yl)biphenyl-4,4'-diamine (TPD15), 4,4',4"-tris(carbazole-9-yl)triphenylamine (TCTA), etc., or epoxy resin, or acrylate (e.g., methacrylate). However, the embodiments of the present disclosure are not limited thereto, and the cover layer CPL may include at least one selected from Compound P1 to Compound P5:

[0383]

[0384] In some embodiments, the refractive index of the cover layer CPL may be about 1.6 or greater. For example, the refractive index of the cover layer CPL may be about 1.6 or greater with respect to light in a wavelength range of about 550 nm to about 660 nm.

[0385] Figures 7 to 10 Each of which is a cross-sectional view of a display device according to one or more embodiments of the present disclosure. Figures 7 to 10 When describing the display device of the embodiment, the Figures 1 to 6 The differences between them will be mainly described.

[0386] refer to Figure 7 The display device DD-a according to one or more embodiments may include a display panel DP including a display element layer DP-ED, a light control layer CCL provided on the display panel DP, and a color filter layer CFL. Figure 7 In one or more embodiments illustrated in the drawings, the display panel DP may include a base layer BS, a circuit layer DP-CL and a display element layer DP-ED provided on the base layer BS, and the display element layer DP-ED may include a light emitting device ED.

[0387] The light emitting device ED may include a first electrode EL1, a hole transport region HTR provided on the first electrode EL1, an emission layer EML provided on the hole transport region HTR, an electron transport region ETR provided on the emission layer EML, and a second electrode EL2 provided on the electron transport region ETR. In some embodiments, as described herein Figures 3 to 6 The structure of the light emitting device can also be applied to Figure 7 The structure of the light-emitting device ED is illustrated in FIG.

[0388] refer to Figure 7 , the emission layer EML can be provided in the opening OH defined in the pixel defining film PDL. For example, the emission layer EML separated by the pixel defining film PDL and provided corresponding to each light-emitting area PXA-R, PXA-G and PXA-B can be intended to emit (e.g., configured to emit) light in substantially the same wavelength range. In the display device DD-a of one or more embodiments, the emission layer EML can be intended to emit (e.g., configured to emit) blue light. In some embodiments, different from the illustrated configuration, in one or more embodiments, the emission layer EML can be provided as a common layer in the entire light-emitting area PXA-R, PXA-G and PXA-B.

[0389] The light control layer CCL may be provided on the display panel DP. The light control layer CCL may include a light converter. The light converter may be a quantum dot, a phosphor, etc. The light converter may be intended to emit (e.g., configured to emit) light provided by converting its wavelength. For example, the light control layer CCL may be a layer containing quantum dots or a layer containing phosphors.

[0390] The light-control layer CCL may include a plurality of light-control parts CCP1, CCP2, and CCP3. The light-control parts CCP1, CCP2, and CCP3 may be spaced apart and / or separated from each other.

[0391] refer to Figure 7 , the separation pattern BMP may be provided between the light control parts CCP1 , CCP2 , and CCP3 that are spaced apart and / or separated from each other, but embodiments of the present disclosure are not limited thereto. Figure 7 It is illustrated that separation pattern BMP does not overlap light control parts CCP1 , CCP2 , and CCP3 , but at least a portion of edges of light control parts CCP1 , CCP2 , and CCP3 may overlap separation pattern BMP.

[0392] The light control layer CCL may include: a first light control component CCP1 containing first quantum dots QD1 that convert the first color light provided by the light emitting device ED into second color light, a second light control component CCP2 containing second quantum dots QD2 that convert the first color light into third color light, and a third light control component CCP3 that transmits the first color light.

[0393] In one or more embodiments, the first light control component CCP1 can provide red light as the second color light, and the second light control component CCP2 can provide green light as the third color light. The third light control component CCP3 can provide blue light by transmitting blue light as the first color light provided by the light emitting device ED. For example, the first quantum dot QD1 can be a red quantum dot, and the second quantum dot QD2 can be a green quantum dot. With respect to quantum dots QD1 and QD2, the same contents as described herein can be applied.

[0394] In some embodiments, the light control layer CCL may further include a scatterer SP. The first light control component CCP1 may include a first quantum dot QD1 and a scatterer SP, the second light control component CCP2 may include a second quantum dot QD2 and a scatterer SP, and the third light control component CCP3 may not include (e.g., may exclude) any quantum dot but include a scatterer SP.

[0395] The scatterer SP may be inorganic particles. For example, the scatterer SP may include TiO 2 、ZnO、Al 2 O3 、SiO 2 and hollow spherical silica. The scatterer SP may include a member selected from TiO 2 、ZnO、Al 2 O 3 、SiO 2 and hollow spherical silica, or may be selected from TiO 2 、ZnO、Al 2 O 3 、SiO 2 and a mixture of at least two of the materials selected from hollow spherical silica.

[0396] The first light control component CCP1, the second light control component CCP2 and the third light control component CCP3 may each respectively include matrix resins BR1, BR2 and BR3 in which quantum dots QD1 and QD2 and scatterers SP are dispersed. In one or more embodiments, the first light control component CCP1 may include first quantum dots QD1 and scatterers SP dispersed in a first matrix resin BR1, the second light control component CCP2 may include second quantum dots QD2 and scatterers SP dispersed in a second matrix resin BR2, and the third light control component CCP3 may include scatterers SP dispersed in a third matrix resin BR3.

[0397] The matrix resins BR1, BR2 and BR3 are the medium in which the quantum dots QD1 and QD2 and the scatterers SP are dispersed, and may include one or more suitable resin compositions (e.g., formed by one or more suitable resin compositions), which may be generally referred to as adhesives. For example, the matrix resins BR1, BR2 and BR3 may be acrylic-based resins, urethane-based resins, silicone-based resins, epoxy-based resins, etc. The matrix resins BR1, BR2 and BR3 may be transparent resins. In one or more embodiments, the first matrix resin BR1, the second matrix resin BR2 and the third matrix resin BR3 may be the same or different from each other.

[0398] The light control layer CCL may include a barrier layer BFL1. The barrier layer BFL1 may play a role in preventing or reducing the penetration of moisture and / or oxygen (hereinafter, referred to as 'moisture / oxygen'). The barrier layer BFL1 may block or reduce the exposure of the light control components CCP1, CCP2, and CCP3 to moisture / oxygen. In some embodiments, the barrier layer BFL1 may cover the light control components CCP1, CCP2, and CCP3. In some embodiments, the barrier layer BFL2 may be provided between the light control components CCP1, CCP2, and CCP3 and the color filter layer CFL.

[0399] The barrier layers BFL1 and BFL2 may include at least one inorganic layer. For example, the barrier layers BFL1 and BFL2 may include an inorganic material. For example, the barrier layers BFL1 and BFL2 may include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride, a metal film ensuring transmittance, etc. In some embodiments, the barrier layers BFL1 and BFL2 may further include an organic film. The barrier layers BFL1 and BFL2 may include a single layer or multiple layers (e.g., formed by a single layer or multiple layers).

[0400] In the display device DD-a of one or more embodiments, the color filter layer CFL may be provided on the light control layer CCL. For example, the color filter layer CFL may be directly provided on the light control layer CCL. In this case, the blocking layer BFL2 may not be provided.

[0401] The color filter layer CFL may include filters CF1, CF2, and CF3. The color filter layer CFL may include a first filter CF1 configured to transmit a second color light, a second filter CF2 configured to transmit a third color light, and a third filter CF3 configured to transmit the first color light. For example, the first filter CF1 may be a red filter, the second filter CF2 may be a green filter, and the third filter CF3 may be a blue filter. The filters CF1, CF2, and CF3 may each include a polymer photosensitive resin and a pigment or dye. The first filter CF1 may include a red pigment or dye, the second filter CF2 may include a green pigment or dye, and the third filter CF3 may include a blue pigment or dye.

[0402] In some embodiments, the embodiments of the present disclosure are not limited thereto, and the third filter CF3 may not include (e.g., may exclude) a pigment or dye. The third filter CF3 may include a polymer photosensitive resin and may not include (e.g., may exclude) a pigment or dye. The third filter CF3 may be transparent. The third filter CF3 may include (e.g., be formed of) a transparent photosensitive resin.

[0403] Furthermore, in one or more than one embodiments, the first filter CF1 and the second filter CF2 may be yellow filters. The first filter CF1 and the second filter CF2 may not be separate but provided as one filter.

[0404] In one or more embodiments, the color filter layer CFL may further include a light shielding member. The light shielding member may be a black matrix. The light shielding member may include an organic light shielding material or an inorganic light shielding material including a black pigment or dye. The light shielding member may prevent or reduce light leakage and may separate the boundaries between adjacent filters CF1, CF2, and CF3.

[0405] The first to third filters CF1 , CF2 , and CF3 may be provided corresponding to the red light emitting area PXA-R, the green light emitting area PXA-G, and the blue light emitting area PXA-B, respectively.

[0406] A base substrate BL may be provided on the color filter layer CFL. The base substrate BL may be a member providing a base surface in which the color filter layer CFL, the light control layer CCL, etc. are provided. The base substrate BL may be a glass substrate, a metal substrate, a plastic substrate, etc. However, the embodiments of the present disclosure are not limited thereto, and the base substrate BL may be an inorganic layer, an organic layer, or an organic-inorganic composite material layer. In some embodiments, unlike the illustrated configuration, in one or more embodiments, a base substrate BL may not be provided.

[0407] Figure 8 is a cross-sectional view illustrating a portion of a display device according to one or more embodiments. In the display device DD-TD of one or more embodiments, the light emitting device ED-BT may include a plurality of light emitting structures OL-B1, OL-B2, and OL-B3. The light emitting device ED-BT may include a first electrode EL1 and a second electrode EL2 facing each other, and a plurality of light emitting structures OL-B1, OL-B2, and OL-B3 sequentially stacked in a thickness direction between the first electrode EL1 and the second electrode EL2. The light emitting structures OL-B1, OL-B2, and OL-B3 may each include an emission layer EML ( Figure 7 ), and a hole transport region HTR and an electron transport region ETR ( Figure 7 ).

[0408] For example, the light emitting device ED-BT included in the display device DD-TD of one or more than one embodiments may be a light emitting device having a tandem structure and including a plurality of emission layers.

[0409] exist Figure 8In one or more embodiments illustrated in the embodiment, all light beams emitted by the light emitting structures OL-B1, OL-B2 and OL-B3, respectively, may be blue light. However, the embodiments of the present disclosure are not limited thereto, and the light beams emitted by the light emitting structures OL-B1, OL-B2 and OL-B3, respectively, may have wavelength ranges different from each other. For example, a light emitting device ED-BT including a plurality of light emitting structures OL-B1, OL-B2 and OL-B3 emitting light beams having wavelength ranges different from each other may be intended to emit (e.g., be configured to emit) white light.

[0410] Charge generation layers CGL1 and CGL2 may be provided between two of the adjacent light emitting structures OL-B1, OL-B2, and OL-B3, respectively. The charge generation layers CGL1 and CGL2 may include a p-type charge generation layer and / or an n-type charge generation layer.

[0411] refer to Fig. 9 , a display device DD-b according to one or more embodiments may include light emitting devices ED-1, ED-2, and ED-3 in which two emission layers are stacked. Figure 2 Compared to the display device DD of one or more embodiments illustrated in Fig. 9 The difference of one or more embodiments illustrated in the embodiment is that each of the first to third light-emitting devices ED-1, ED-2 and ED-3 includes two emission layers stacked in the thickness direction. In each of the first to third light-emitting devices ED-1, ED-2 and ED-3, the two emission layers may be intended to emit light in substantially the same wavelength region.

[0412] The first light-emitting device ED-1 may include a first red emission layer EML-R1 and a second red emission layer EML-R2. The second light-emitting device ED-2 may include a first green emission layer EML-G1 and a second green emission layer EML-G2. In some embodiments, the third light-emitting device ED-3 may include a first blue emission layer EML-B1 and a second blue emission layer EML-B2. The emission auxiliary component OG may be provided between the first red emission layer EML-R1 and the second red emission layer EML-R2, between the first green emission layer EML-G1 and the second green emission layer EML-G2, and between the first blue emission layer EML-B1 and the second blue emission layer EML-B2.

[0413] The emission auxiliary component OG may include a single layer or a plurality of layers. The emission auxiliary component OG may include a charge generation layer. More specifically, the emission auxiliary component OG may include an electron transport region, a charge generation layer, and a hole transport region stacked in sequence. The emission auxiliary component OG may be provided as a common layer of all the first to third light-emitting devices ED-1, ED-2, and ED-3. However, the embodiments of the present disclosure are not limited thereto, and the emission auxiliary component OG may be provided by patterning in an opening OH defined in a pixel defining film PDL.

[0414] The first red emission layer EML-R1, the first green emission layer EML-G1, and the first blue emission layer EML-B1 may be provided between the hole transport region HTR and the emission auxiliary component OG. The second red emission layer EML-R2, the second green emission layer EML-G2, and the second blue emission layer EML-B2 may be provided between the emission auxiliary component OG and the electron transport region ETR.

[0415] For example, the first light-emitting device ED-1 may include a first electrode EL1, a hole transport region HTR, a second red emission layer EML-R2, an emission auxiliary component OG, a first red emission layer EML-R1, an electron transport region ETR, and a second electrode EL2 stacked in sequence. The second light-emitting device ED-2 may include a first electrode EL1, a hole transport region HTR, a second green emission layer EML-G2, an emission auxiliary component OG, a first green emission layer EML-G1, an electron transport region ETR, and a second electrode EL2 stacked in sequence. The third light-emitting device ED-3 may include a first electrode EL1, a hole transport region HTR, a second blue emission layer EML-B2, an emission auxiliary component OG, a first blue emission layer EML-B1, an electron transport region ETR, and a second electrode EL2 stacked in sequence.

[0416] In some embodiments, an optical auxiliary layer PL may be provided on the display element layer DP-ED. The optical auxiliary layer PL may include a polarizing layer. The optical auxiliary layer PL may be provided on the display panel DP and controls reflected light due to external light in the display panel DP. Unlike the illustrated configuration, the optical auxiliary layer PL in the display device according to one or more embodiments may not be provided.

[0417] Different from Figure 8 and Fig. 9 , Fig.10The example display device DD-c includes four light emitting structures OL-B1, OL-B2, OL-B3 and OL-C1. The light emitting device ED-CT may include a first electrode EL1 and a second electrode EL2 facing each other, and first to fourth light emitting structures OL-B1, OL-B2, OL-B3 and OL-C1 sequentially stacked in the thickness direction between the first electrode EL1 and the second electrode EL2. Charge generation layers CGL1, CGL2 and CGL3 may be provided between the first to fourth light emitting structures OL-B1, OL-B2, OL-B3 and OL-C1. Among the four light emitting structures, the first to third light emitting structures OL-B1, OL-B2 and OL-B3 may be intended to emit blue light, and the fourth light emitting structure OL-C1 may be intended to emit green light. However, the embodiments of the present disclosure are not limited thereto, and the first to fourth light emitting structures OL-B1, OL-B2, OL-B3 and OL-C1 may be intended to emit light in different wavelength regions.

[0418] The charge generation layers CGL1, CGL2 and CGL3 provided between adjacent light emitting structures OL-B1, OL-B2, OL-B3 and OL-C1 may include p-type or kind of charge generation layers (p-charge generation layers) and / or n-type or kind of charge generation layers (n-charge generation layers).

[0419] In one or more than one embodiment, the electronic device may include a display device including a plurality of light emitting elements and a control unit for controlling the display device. The electronic device of one or more than one embodiment may be a device activated according to an electrical signal. The electronic device may include a display device of one or more than one suitable embodiment. For example, the electronic device may include a television, a monitor, a large display device (such as an outdoor billboard), a personal computer, a laptop computer, a personal digital terminal, a display device for a car, a game console, a portable electronic device, a medium-sized display device, and a small display device (such as a camera).

[0420] Fig.11 is a perspective view schematically showing an electronic device EA including a display device according to one or more embodiments. The electronic device EA may include display devices DD-1, DD-2, DD-3, and DD-4.

[0421] Fig.11 is a diagram showing an automobile AM ​​in which first to fourth display devices DD-1, DD-2, DD-3, and DD-4 are provided. At least one of the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 may include the Figure 1 , Figure 2 and Figures 8 to 11 The configurations of the display devices DD, DD-TD, DD-a, DD-b, and DD-c of the explained embodiments are described.

[0422] exist Fig.11 In the embodiment, a car AM is shown as an example, but this is an example, and the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 can be provided in one or more suitable vehicles, such as bicycles, motorcycles, trains, ships, and airplanes. In some embodiments, at least one of the first to fourth display devices DD-1, DD-2, DD-3, and DD-4, which contain the same configuration as the display devices DD, DD-TD, DD-a, DD-b, and DD-c, can be used for personal computers, laptop computers, personal digital terminals, game consoles, portable electronic devices, televisions, monitors, outdoor billboards, etc. In some embodiments, these are exemplified as embodiments, and the display devices can be used in other electronic devices as long as they do not deviate from the present disclosure.

[0423] At least one of the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 may include a reference Figures 3 to 6 A light emitting element ED is described (eg, explained).

[0424] At least one of the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 may include a reference Figures 3 to 6 The light-emitting element ED of the embodiment explained. The light-emitting element ED of one or more embodiments may contain one or more compounds of the embodiment. At least one of the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 may include a light-emitting element ED containing one or more compounds of the embodiment, and may show excellent or suitable display quality.

[0425] Reference Fig.11 , the automobile AM ​​may include a steering wheel HA and a gear member GR for operation of the automobile AM, and a front window GL may be provided to face the driver.

[0426] The first display device DD-1 may be provided in a first area overlapping with the steering wheel HA. For example, the first display device DD-1 may be a digital cluster device that displays first information of the automobile AM. The first information may include a first scale showing the driving speed of the automobile AM, and a second scale showing the number of revolutions of the engine (i.e., revolutions per minute (RPM)), and an image showing the fuel status. The first scale and the second scale may be represented by digital images.

[0427] The second display device DD-2 can be provided in a second area facing the driver's seat and overlapping with the front window GL. The driver's seat can be a seat in which a steering wheel HA is provided. For example, the second display device DD-2 can be a head-up display (HUD) showing the second information of the car AM. The second display device DD-2 can be optically transparent. The second information may include a digital number showing the driving speed of the car AM, and may further include information including the current time, etc. Different from the accompanying drawings, the second information of the second display device DD-2 can be projected and displayed on the front window GL.

[0428] The third display device DD-3 may be provided in a third zone adjacent to the gear member GR. For example, the third display device DD-3 may be a central information display (CID) for a car, provided between a driver's seat and a passenger seat and showing the third information. The passenger seat may be a seat spaced apart from the driver's seat, with the gear member GR therebetween. The third information may include information about road conditions (e.g., navigation information), information about playing music or broadcasting, information about playing dynamic images, information about the temperature in the car AM, etc.

[0429] The fourth display device DD-4 may be provided in a fourth area spaced apart from the steering wheel HA and the shift member GR, and adjacent to the side of the automobile AM. For example, the fourth display device DD-4 may be a digital side mirror that displays the fourth information. The fourth information may include an external image of the automobile AM ​​taken by a camera module provided outside the automobile AM. The fourth information may include an external image of the automobile AM.

[0430] The first to fourth information described herein are for illustration, and the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 may further display information about the interior and exterior of the automobile. The first to fourth information may contain information that is different from each other. However, one or more than one embodiments of the present disclosure are not limited thereto, and a portion of the first to fourth information may contain the same information.

[0431] Terms such as "substantially", "about" and "approximately" are used as relative terms rather than as terms of degree, and are intended to account for the inherent deviations in measurements or calculations that one of ordinary skill in the art would recognize. They may include the stated value and an acceptable range of deviation determined by one of ordinary skill in the art, taking into account the limitations and errors associated with the measurement of the quantity. For example, "about" may refer to one or more than one standard deviation, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0432] The numerical ranges disclosed herein include and are intended to disclose all subranges of the same numerical precision. For example, a range of "1.0 to 10.0" includes all subranges having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Therefore, the applicant reserves the right to amend this specification (including the claims) to explicitly list any subranges that fall within the ranges explicitly listed herein.

[0433] Any suitable hardware, firmware (e.g., application specific integrated circuit), software, or a combination of software, firmware, and hardware may be used to implement the light emitting device, light emitting element, and / or any other related device or component according to the embodiments of the present disclosure described herein. For example, the various components of the light emitting device and / or light emitting element may be formed on an integrated circuit (IC) chip or on a separate IC chip. In addition, the various components of the light emitting device and / or light emitting element may be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on a substrate. In addition, the various components of the device and / or element may be processes or threads that run on one or more processors in one or more computing devices, execute computer program instructions, and interact with other system components for performing the various functions described herein. The computer program instructions are stored in a memory, which may be implemented in a computing device using a standard memory device (such as a random access memory (RAM) as an example). The computer program instructions may also be stored in other non-temporary computer-readable media, such as a CD-ROM, a flash drive, etc. as an example. Furthermore, those skilled in the art will recognize that the functionality of various computing devices may be combined or integrated into a single computing device, or that the functionality of a particular computing device may be distributed across one or more other computing devices without departing from the scope of the embodiments of the present disclosure.

[0434] In the present disclosure, when the particles are spherical, "diameter" means the average particle diameter, and when the particles are non-spherical, "diameter" means the length of the major axis. The diameter (or size) of the particles can be measured by particle size analysis, dynamic light scattering, scanning electron microscopy and / or transmission electron microscopy. When the size of the particles is measured using a particle size analyzer, the average particle diameter (or size) can be referred to as D50. The term "D50" as used herein refers to the average diameter (or size) of the particles whose cumulative volume corresponds to 50% by volume in a particle size distribution (e.g., cumulative distribution), and refers to the value corresponding to the particle size of 50% of the smallest particle when the total number of particles is 100% in a distribution curve accumulated in the order of the smallest particle size to the largest particle size. Particle size analysis can be performed with a HORIBA LA-950 laser particle size analyzer.

[0435] Hereinafter, referring to the embodiment and the comparative embodiment, the compound represented by Formula 1 and the light emitting element according to the embodiment of the present disclosure will be specifically explained. In some embodiments, the embodiment is an example to help understand the present disclosure, but the scope of the present disclosure is not limited thereto.

[0436] Example

[0437] 1. Synthesis of Example Compounds

[0438] The synthesis method of the compound according to one or more embodiments will be specifically explained by exemplifying the synthesis method of compound 1, compound 20, compound 79, compound 111, compound 204, compound 240, compound 320, compound 355, and compound 410. In some embodiments, the synthesis method of the example compound explained below is an embodiment, and the synthesis method of the compound according to one or more embodiments of the present disclosure is not limited to the embodiment.

[0439] (1) Synthesis of Compound 1

[0440] Compound 1 can be synthesized through reaction 1.

[0441] Reaction 1

[0442]

[0443] 1) Synthesis of intermediate 1-2

[0444] Intermediate 1-1 (4.88 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and 2-chloro-4,6-diphenyl-1,3,5-triazine (2.67 g) were dissolved in THF / H 2 O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain intermediate 1-2 (3.02g, yield: 51%).

[0445] 2) Synthesis of Compound 1

[0446] Intermediate 1-2 (5.93 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3(3.45 g) and (4-bromophenyl) dimethylphosphine oxide (2.33 g) were dissolved in THF / H 2 O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain compound 1 (3.77g, yield: 61%).

[0447] ESI-LCMS:[M]+:C 41 H 38 N 3 OP,618.28.

[0448] (2) Synthesis of Compound 20

[0449] Compound 20 can be synthesized via reaction 2.

[0450] Reaction 2

[0451]

[0452] 1) Synthesis of intermediate 1-2

[0453] Intermediate 1-1 (4.88 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and 2-chloro-4,6-diphenyl-1,3,5-triazine (2.67 g) were dissolved in THF / H 2 O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain intermediate 1-2 (3.02g, yield: 51%).

[0454] 2) Synthesis of Compound 20

[0455] Intermediate 1-2 (5.93 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and (3-bromophenyl) dimethylphosphine oxide (2.33 g) were dissolved in THF / H 2O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain compound 20 (4.02g, yield: 65%).

[0456] ESI-LCMS:[M]+:C 41 H 38 N 3 OP,618.28.

[0457] (3) Synthesis of Compound 79

[0458] Compound 79 can be synthesized via reaction 3.

[0459] Reaction 3

[0460]

[0461] 1) Synthesis of Intermediate 79-1

[0462] Intermediate 1-1 (4.88 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and 2-([1,1'-biphenyl]-4-yl)-4-chloro-6-phenyl-1,3,5-triazine (3.43 g) were dissolved in THF / H 2 O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain intermediate 79-1 (4.68g, yield: 70%).

[0463] 2) Synthesis of Compound 79

[0464] Intermediate 79-1 (6.69 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and (10-bromoanthracene-9-yl)dimethylphosphine oxide (3.33 g) were dissolved in THF / H 2O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain compound 79 (5.08g, yield: 64%).

[0465] ESI-LCMS:[M]+:C 55 H 46 N 3 OP,794.34.

[0466] (4) Synthesis of Compound 111

[0467] Compound 111 can be synthesized through reaction 4.

[0468] Reaction 4

[0469]

[0470] 1) Synthesis of intermediate 111-2

[0471] Intermediate 111-1 (5.00 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and 2-chloro-4,6-diphenyl-1,3,5-triazine (2.67 g) were dissolved in THF / H 2 O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain intermediate 111-2 (3.56g, yield: 59%).

[0472] 2) Synthesis of compound 111

[0473] Intermediate 111-2 (6.05 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and (10-bromoanthracene-9-yl)dimethylphosphine oxide (3.33 g) were dissolved in THF / H 2O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain compound 111 (4.61g, yield: 73%).

[0474] ESI-LCMS:[M]+:C 42 H 38 N 3 OP,630.28.

[0475] (5) Synthesis of Compound 204

[0476] Compound 204 can be synthesized via reaction 5.

[0477] React 5

[0478]

[0479] 1) Synthesis of intermediate 111-2

[0480] Intermediate 111-1 (5.00 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and 2-chloro-4,6-diphenyl-1,3,5-triazine (2.67 g) were dissolved in THF / H 2 O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain intermediate 111-2 (3.56g, yield: 59%).

[0481] 2) Synthesis of Compound 204

[0482] Intermediate 111-2 (6.05 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and (10-bromoanthracene-9-yl)dimethylphosphine oxide (3.33 g) were dissolved in THF / H 2O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain compound 204 (5.16g, yield: 64%).

[0483] ESI-LCMS:[M]+:C 56 H 46 N 3 OP,806.34.

[0484] (6) Synthesis of Compound 240

[0485] Compound 240 can be synthesized via reaction 6.

[0486] Reaction 6

[0487]

[0488] 1) Synthesis of intermediate 240-2

[0489] Intermediate 240-1 (5.40 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and 2-chloro-4,6-diphenyl-1,3,5-triazine (2.67 g) were dissolved in THF / H 2 O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain intermediate 240-2 (4.15g, yield: 70%).

[0490] 2) Synthesis of Compound 240

[0491] Intermediate 240-2 (6.45 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and (3-bromophenyl) dimethylphosphine oxide (2.33 g) were dissolved in THF / H 2O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain compound 240 (4.22g, yield: 63%).

[0492] ESI-LCMS:[M]+:C 45 H 42 N 3 OP,670.31.

[0493] (7) Synthesis of Compound 320

[0494] Compound 320 can be synthesized via reaction 7.

[0495] Reaction 7

[0496]

[0497] 1) Synthesis of intermediate 320-1

[0498] Intermediate 240-1 (5.40 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and 2-([1,1':4',1"-terphenyl]-4-yl)-4-chloro-6-phenyl-1,3,5-triazine (4.19 g) were dissolved in THF / H 2 O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with diethyl ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain intermediate 320-1 (4.86g, yield: 61%).

[0499] 2) Synthesis of compound 320

[0500] Intermediate 320-1 (7.97 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and (10-bromoanthracene-9-yl)dimethylphosphine oxide (3.33 g) were dissolved in THF / H 2O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain compound 320 (6.22g, yield: 62%).

[0501] ESI-LCMS:[M]+:C 71 H 58 N 3 OP,998.43.

[0502] (8) Synthesis of Compound 355

[0503] Compound 355 can be synthesized via reaction 8.

[0504] Reaction 8

[0505]

[0506] 1) Synthesis of intermediate 355-2

[0507] Intermediate 1-1 (4.88 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and 2-([1,1'-biphenyl]-2-yl)-4-chloro-6-phenyl-1,3,5-triazine (3.43 g) were dissolved in THF / H 2 O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain intermediate 355-2 (3.94g, yield: 59%).

[0508] 2) Synthesis of compound 355

[0509] Intermediate 355-2 (6.69 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and (3-bromophenyl)diphenylphosphine oxide (3.57 g) were dissolved in THF / H 2O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain compound 355 (4.58g, yield: 56%).

[0510] ESI-LCMS:[M]+:C 57 H 46 N 3 OP,818.34.

[0511] (9) Synthesis of Compound 410

[0512] Compound 410 can be synthesized via reaction 9.

[0513] Reaction 9

[0514]

[0515] 1) Synthesis of Intermediate 410-1

[0516] Intermediate 1-1 (4.88 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and 2-([1,1'-biphenyl]-3-yl)-4-chloro-6-phenyl-1,3,5-triazine (3.43 g) were dissolved in THF / H 2 O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was lowered to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with diethyl ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain intermediate 410-1 (3.88g, yield: 58%).

[0517] 2) Synthesis of compound 410

[0518] Intermediate 410-1 (6.69 g), Pd(PPh 3 ) 4 (0.56g), K 2 CO 3 (3.45 g) and (10-bromoanthracene-9-yl)diphenylphosphine oxide (4.57 g) were dissolved in THF / H 2O (100ml / 25ml) and stirred at about 60°C for about 12 hours. The temperature of the reaction solution was reduced to room temperature, and the reaction was quenched with water. The resulting mixture was extracted three times with ether, and the separated organic layer was dried over anhydrous magnesium sulfate and distilled under reduced pressure. The residue thus obtained was separated and purified by column chromatography to obtain compound 410 (6.62g, yield: 72%).

[0519] ESI-LCMS:[M]+:C 65 H 50 N 3 OP,918.37.

[0520] 2. Fabrication and property evaluation of light-emitting elements

[0521] (1) Manufacturing of light-emitting elements

[0522] The light-emitting element of the embodiment comprising the compound of the embodiment in the electron transport layer is manufactured by the method described herein. Example compound 1, example compound 20, example compound 79, example compound 111, example compound 204, example compound 240, example compound 320, example compound 355 and example compound 410 are used as the material of the electron transport layer to manufacture the light-emitting element of Example 1 to Example 9. Comparative Examples 1 to 5 correspond to light-emitting elements using Comparative Compounds C1 to C5 as the material of the electron transport layer, respectively.

[0523] The method for manufacturing the light-emitting element of Example 1 is as follows.

[0524] As the first electrode, a 15 ohm per square centimeter (Ω / cm 2 ) of ITO electrode (thickness is ) glass substrate (product of Corning Inc.) was cut into a size of 50 millimeters (mm) × 50 mm × 0.7 mm, cleaned by ultrasonic wave using isopropyl alcohol and distilled water for about 5 minutes each, and by irradiating ultraviolet rays for about 30 minutes, and then cleaned by ozone. After that, the ITO glass substrate was installed in a vacuum deposition device.

[0525] On the first electrode, NPD is deposited to form a layer having a thickness of about A hole injection layer having a thickness of about 100 nm is formed on the hole injection layer by depositing H-1-1. On the hole transport layer, a CzSi layer with a thickness of about The emission auxiliary layer.

[0526] On the emission auxiliary layer, a mixture of HT3 and ETH66 in a weight ratio of 1:1 as a host material, AD-38 as a sensitizer, and t-DABNA as a dopant material are co-deposited in a weight ratio of about 64:15:1 to form a layer with a thickness of about On the emission layer, TSPO1 is deposited to form a layer with a thickness of about Then, on the hole blocking layer, a layer with a thickness of about An electron transport layer having a thickness of about 100 nm is formed by depositing LiF on the electron transport layer. Then, Al is deposited on the electron injection layer to form a layer with a thickness of about A second electrode is formed to form a light-emitting element.

[0527] The compounds used for producing the light-emitting elements of Examples 2 to 9 and Comparative Examples 1 to 5 are shown in Table 1, and the other conditions are the same as those of the light-emitting element of Example 1.

[0528] Example compounds

[0529]

[0530] Comparison Compounds

[0531]

[0532] Functional layer compounds

[0533]

[0534] (2) Evaluation of properties of light-emitting elements

[0535] The properties of the light-emitting elements of Examples 1 to 9 and Comparative Examples 1 to 5 were evaluated. Table 1 shows the evaluation results of the light-emitting elements of Examples 1 to 9 and Comparative Examples 1 to 5.

[0536] In order to evaluate the properties of the light-emitting elements of Examples 1 to 9 and Comparative Examples 1 to 5, the brightness of the light-emitting elements was measured at about 1000 (cd / m 2 )) at a current density of 100 Å, a driving voltage (V), an emission efficiency (candela per ampere (cd / A)) and a relative lifespan (T95). The relative lifespan (T95) is obtained by measuring the time taken to reach about 95% brightness compared to the initial brightness. The relative lifespan is calculated based on the light-emitting element of Comparative Example 1, and the results are shown in Table 1.

[0537] Table 1

[0538]

[0539] Referring to Table 1, when compared with the light-emitting elements of Comparative Examples 1 to 5, the light-emitting elements of Examples 1 to 9 using the compounds according to the embodiments of the present disclosure as electron transport layer materials exhibit low driving voltage, high emission efficiency, and long life characteristics.

[0540] The embodiment compound comprises a core structure in which two phenylene groups are connected via a cycloalkyl group. In the embodiment compound, because the two phenylene groups are connected via a cycloalkyl group, the conjugated structure of each of the two phenylene groups can be interrupted. Therefore, the embodiment compound can have a high triplet energy level, and thus can prevent or reduce the quenching of excitons generated in the emission layer in the electron transport layer.

[0541] In some embodiments, the example compounds include both a phosphine oxide group and a triazine group bonded to the core structure (eg, simultaneously). Because the example compounds include a phosphine oxide group and a triazine group in parallel (eg, simultaneously), high charge transport capability can be exhibited.

[0542] Therefore, the light-emitting elements of Examples 1 to 9 can exhibit element properties of low driving voltage, high emission efficiency, and long lifetime.

[0543] In contrast, the comparative compound C1 (TPBi) applied to the electron transport layer of Comparative Example 1 does not include a cycloalkyl group in the core structure, and the conjugated structure is not interrupted, and therefore, the excitons generated in the emission layer are quenched in the electron transport layer, and low emission efficiency and lifetime can be observed. In some embodiments, the comparative compound C1 (TPBi) does not include a phosphine oxide group and a triazine group as substituents, and low charge transport capability and high driving voltage can be observed.

[0544] In some embodiments, Comparative Compounds C2 and C3 applied to the electron transport layers of Comparative Examples 2 and 3 include only a triazine group as a substituent but no phosphine oxide group. Therefore, it can be observed that the electron transport capability is low and the device properties are low.

[0545] In some embodiments, in the comparative compound C4 and the comparative compound C5 of the electron transport layer applied to comparative example 4 and comparative example 5, the two phenylene groups contained in the core structure are not connected via a cycloalkyl group. In comparative compound C4, the two phenylene groups are connected via an oxygen atom, and it can be observed that the lowest unoccupied molecular orbital (LUMO) energy level increases, the charge transport capability to the emission layer deteriorates, and the element properties are not good or not suitable. In comparative compound C5, the two phenylene groups are connected via a direct bond, and the conjugated structure is not interrupted, the triplet energy level is low, and the exciton provided from the emission layer is quenched. Therefore, it can be observed that the element properties are low.

[0546] The light-emitting element of one or more than one embodiments may exhibit element properties of low driving voltage, high emission efficiency, and long lifetime.

[0547] The compounds of one or more than one embodiments are contained in the electron transport layer of the light-emitting element and can contribute to the improvement of the emission efficiency and lifetime of the light-emitting element.

[0548] The display device of one or more than one embodiments may show excellent or suitable display quality.

[0549] Although embodiments of the present disclosure have been described, it should be understood that the present disclosure should not be limited to these embodiments, but one or more suitable changes and modifications may be made by one of ordinary skill in the art within the spirit and scope of the present disclosure as claimed.

[0550] Therefore, the technical scope of the present disclosure is not intended to be limited to the contents set forth in the detailed description of the specification, but is intended to be defined by the appended claims and their equivalents.

Claims

1. A compound represented by Formula 1: Formula 1 And in Formula 1, Cy is a substituted or unsubstituted cycloalkyl group having 3 to 30 ring carbon atoms, L is a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms, R1 to R4 are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, R a and R b each independently represents a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted silyl group, a substituted or unsubstituted thiol group, a substituted or unsubstituted oxy group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms, and / or combines with an adjacent group to form a ring, "a" and "b" are each independently an integer from 0 to 4, and "l" is 1 or 2.

2. The compound according to claim 1, wherein Formula 1 is represented by at least one selected from Formula 1-1a to Formula 1-1c: Formula 1-1a Formula 1-1b Formula 1-1c as well as In Formula 1-1a to Formula 1-1c, L, R1 to R4, R a , R b , "a", "b" and "l" are as defined in Formula 1.

3. The compound of claim 1, wherein R1 and R2 are each independently an unsubstituted methyl group or an unsubstituted phenyl group.

4. The compound of claim 1, wherein R3 and R4 are each independently an unsubstituted phenyl group, an unsubstituted biphenyl group, an unsubstituted terphenyl group, an unsubstituted naphthyl group, an unsubstituted anthracenyl group, or an anthracenyl group substituted with a phenyl group.

5. The compound of claim 1, wherein L is an unsubstituted phenylene group, an unsubstituted naphthalene group, or an unsubstituted anthracene group.

6. The compound according to claim 1, wherein Formula 1 is represented by Formula 1-2a or Formula 1-2b: Formula 1-2a Formula 1-2b as well as In Formula 1-2a and Formula 1-2b, Cy, L, R1 to R4, R a , R b , "a", "b" and "l" are as defined in Formula 1.

7. The compound of claim 1, wherein each R a and R b It's a hydrogen atom.

8. The compound according to claim 1, wherein the compound represented by Formula 1 is represented by at least one compound selected from Compound Group 1: Compound Group 1 9. Light-emitting components, including: a first electrode; a second electrode on the first electrode; as well as At least one functional layer comprising the compound according to any one of claims 1 to 8 and between the first electrode and the second electrode.

10. The light-emitting element according to claim 9, wherein the at least one functional layer comprises an emission layer, a hole transport region between the first electrode and the emission layer, and an electron transport region between the emission layer and the second electrode, and The electron transport region comprises the compound according to any one of claims 1 to 8.

11. A display device comprising: Base layer; a circuit layer on the substrate layer; as well as a display element layer including a light emitting element and on the circuit layer, wherein the light emitting element comprises a first electrode, a second electrode opposite to the first electrode, and at least one functional layer between the first electrode and the second electrode, and The at least one functional layer comprises the compound according to any one of claims 1 to 8.

12. The display device of claim 11, wherein the at least one functional layer comprises an emission layer, a hole transport region between the first electrode and the emission layer, and an electron transport region between the emission layer and the second electrode, and The electron transport region comprises the compound according to any one of claims 1 to 8.

13. The display device according to claim 11, further comprising a light control layer on the display element layer, The light control layer comprises quantum dots.

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