Polycyclic compound, light-emitting element including same, and display device including same

Abstract

The invention relates to a polycyclic compound, a light-emitting element including the polycyclic compound, and a display device including the light-emitting element. The light emitting element includes a first electrode, a second electrode disposed on the first electrode, and a functional layer disposed between the first electrode and the second electrode, the functional layer containing a polycyclic compound represented by Formula 1 below as a first compound. The light-emitting element may exhibit excellent or appropriate color reproducibility and long lifespan characteristics. Formula 1 # imgabs0 #

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0112577 filed in the Korean Intellectual Property Office on August 28, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure herein relates to a polycyclic compound, a light emitting element including the polycyclic compound, and a display device including the light emitting element. Background Art

[0004] Recently, organic electroluminescent display devices and the like have been actively developed as image display devices. The organic electroluminescent display device and the like are display devices 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 recombined in an emission layer of the display device. Subsequently, the light-emitting material of the emission layer (e.g., light-emitting layer) emits light to implement display (e.g., display of an image).

[0005] The application of light-emitting elements in display devices requires improvements in luminous efficiency and / or life, etc., or there is a desire or need for improvements in luminous efficiency and / or life, etc. Therefore, research and development of materials that can stably achieve these characteristics or expectations, such as materials for light-emitting elements, is required, and such development is being continuously carried out. Summary of the invention

[0006] One or more aspects of embodiments of the present disclosure are directed to a light emitting element having improved luminous efficiency and lifetime.

[0007] One or more aspects of the disclosed embodiments relate to polycyclic compounds having improved material lifetime.

[0008] One or more aspects of embodiments of the present disclosure are directed to a display device including a light emitting element having improved light emitting efficiency and lifetime, thereby having excellent or appropriate display quality.

[0009] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the presented embodiments of the disclosure.

[0010] One or more embodiments of the present disclosure provide a polycyclic compound represented by Formula 1.

[0011] Formula 1

[0012]

[0013] In Formula 1, R1 To R 5 At least one of (e.g., R 1 To R 5 One or two of the above) can be represented by Formula 2, and the remaining (for example, selected from R 1 To R 5 Any remaining ) in may each independently be a hydrogen atom or a deuterium atom.

[0014] Formula 2

[0015]

[0016] In formula 2, X 1 To X 3 can be independently N, CH or CD, X 1 To X 3 Two or more of them are independently N, L 1 and L 2 may be each independently a directly linked, substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 3 to 30 ring carbon atoms, A 1 and A 2 may each independently be a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 30 ring carbon atoms, or a substituted or unsubstituted silyl group, and It may be a moiety connected to Formula 1.

[0017] In one or more embodiments, Formula 2 may be represented by Formula 2-1 or Formula 2-2.

[0018] Formula 2-1

[0019]

[0020] Formula 2-2

[0021]

[0022] In formula 2-2, X 11 can be CH or CD, and in Formula 2-1 and Formula 2-2, L 1 , L 2 , A 1 , A 2 and may each independently be as defined in Formula 2.

[0023] A in Formula 2 1 and A 2Each of A and B may be independently a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted triphenylsilyl group, or may be represented by the formula SG. 1 and A 2 When each is independently represented by the formula SG, C selected from the formula SG 1 To C 5 At least one (eg, any one) of the rings may be connected to L 1 or L 2 .

[0024] Formula SG

[0025]

[0026] In one or more embodiments, selected from A 1 and A 2 At least one (e.g., any one) of the formula SG may be represented by the formula, and the remaining (e.g., selected from A 1 and A 2 Any remaining ) in may be a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazolyl group, or a substituted or unsubstituted triphenylsilyl group.

[0027] In one or more embodiments, L in Formula 2 1 and L 2 Each may independently be a directly linked or substituted or unsubstituted phenylene group.

[0028] In one or more embodiments, at least one of the hydrogen atoms selected from the polycyclic compound represented by Formula 1 may be substituted with a deuterium atom.

[0029] In one or more embodiments, the polycyclic compound represented by Formula 1 may be a phosphorescent host.

[0030] In one or more embodiments of the present disclosure, the light emitting element includes a first electrode, a second electrode disposed on the first electrode, and a functional layer disposed between the first electrode and the second electrode and including (eg, containing) a polycyclic compound represented by Formula 1 as a first compound.

[0031] Formula 1

[0032]

[0033] In Formula 1, R 1 To R 5 At least one of (e.g., R 1 To R 5 One or two of the above) can be represented by Formula 2, and the remaining (for example, selected from R 1 To R 5Any remaining ) may be hydrogen atoms or deuterium atoms.

[0034] Formula 2

[0035]

[0036] In formula 2, X 1 To X 3 can be independently N, CH or CD, X 1 To X 3 Two or more of them are N, L 1 and L 2 may be each independently a directly linked, substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 3 to 30 ring carbon atoms, A 1 and A 2 may each independently be a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 30 ring carbon atoms, or a substituted or unsubstituted silyl group, and It may be a moiety connected to Formula 1.

[0037] In one or more embodiments, the functional layer may include an emission layer, a hole transport region arranged between the first electrode and the emission layer, and an electron transport region arranged between the emission layer and the second electrode, and at least one selected from the emission layer and the electron transport region may include (e.g., contain) a first compound.

[0038] In one or more embodiments, the emission layer may include a first compound and a phosphorescent dopant.

[0039] In one or more embodiments, the emission layer may include a first compound, a second compound represented by Formula D-1, and a third compound represented by Formula HT-1.

[0040] Formula D-1

[0041]

[0042] In formula D-1, Q 1 To Q 4 may be each independently C or N, C1 to C4 may each independently be a substituted or unsubstituted hydrocarbon ring group having 5 to 30 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 2 to 30 ring carbon atoms, and L 11 To L 13 Can be independently connected for direct connection, substituted or unsubstituted alkylene having 1 to 20 carbon atoms, substituted or unsubstituted arylene having 6 to 30 ring carbon atoms, or substituted or unsubstituted heteroarylene having 2 to 30 ring carbon atoms. b11 to b13 may each independently be 0 or 1, R 61 To R 66 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 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-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring-forming carbon atoms, and d1 to d4 may each independently be an integer selected from 0 to 4:

[0043] Formula HT-1

[0044]

[0045] In formula HT-1, A 1 To A 8 Can be N or CR independently 51 , L 1 Y may be a directly linked, 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 Can be direct connection, CR 52 R 53 or SiR 54 R 55 , and Ar 1 R 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. 51 To R 55 Each 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 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-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring-forming carbon atoms, and / or may be connected to an adjacent group to form a ring.

[0046] In one or more embodiments, the emission layer may further include a fourth compound represented by Formula F-1.

[0047] Formula F-1

[0048]

[0049] Among them, in formula F-1, A 1 and A 2 can be independently O, S, Se or NR m , R m 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, R 1a To R 11a They may each independently be a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron 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, and / or may bond with an adjacent group to form a ring.

[0050] In one or more embodiments, the emissive layer may emit blue light.

[0051] In one or more embodiments, Formula 2 may be represented by Formula 2-1 or Formula 2-2.

[0052] Formula 2-1

[0053]

[0054] Formula 2-2

[0055]

[0056] In formula 2-2, X 11 can be CH or CD, and in Formula 2-1 and Formula 2-2, L 1 , L 2 , A 1 and A 2 may each independently be as defined in Formula 2.

[0057] In one or more embodiments of the present disclosure, a display device includes a substrate layer, a circuit layer arranged on the substrate layer, and a display device layer arranged on the circuit layer and including a light-emitting element. The light-emitting element includes a first electrode, a second electrode facing the first electrode, and an emission layer arranged between the first electrode and the second electrode and including (e.g., containing) a polycyclic compound according to the described embodiment.

[0058] In one or more embodiments, the light emitting element may emit blue light. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated into and constitute a part of this specification. The accompanying drawings illustrate example embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure. In the drawings:

[0060] Figure 1 A plan view for explaining a display device according to one or more embodiments of the present disclosure;

[0061] Figure 2 To explain along Figure 1 A cross-sectional view of a portion taken along line II' in FIG.

[0062] Figure 3 A cross-sectional view schematically illustrating a light emitting element according to one or more embodiments of the present disclosure;

[0063] Figure 4 A cross-sectional view schematically illustrating a light emitting element according to one or more embodiments of the present disclosure;

[0064] Figure 5 A cross-sectional view schematically illustrating a light emitting element according to one or more embodiments of the present disclosure;

[0065] Figure 6 A cross-sectional view schematically illustrating a light emitting element according to one or more embodiments of the present disclosure;

[0066] Figure 7 A cross-sectional view schematically illustrating a light emitting element according to one or more embodiments of the present disclosure;

[0067] Figure 8 A cross-sectional view for explaining a display device according to one or more embodiments of the present disclosure;

[0068] Fig. 9 A cross-sectional view for explaining a display device according to one or more embodiments of the present disclosure;

[0069] Fig.10 A cross-sectional view for explaining a display device according to one or more embodiments of the present disclosure;

[0070] Fig.11 A cross-sectional view for explaining a display device according to one or more embodiments of the present disclosure; and

[0071] Fig.12 A view for explaining the interior of a vehicle in which a display device according to one or more embodiments is arranged. DETAILED DESCRIPTION

[0072] The present disclosure can be modified in one or more suitable ways, and the present disclosure has many forms, and therefore specific embodiments will be exemplified in the drawings, and specific embodiments will be described in more detail in the detailed description of the present disclosure. However, it should be understood that the present disclosure is not intended to be limited to the specific form disclosed, but rather, it is intended to cover all modifications, equivalents and alternatives that fall within the spirit and scope of the present disclosure.

[0073] When explaining each of the drawings, the same reference numerals are used to refer to the same elements, and repeated descriptions thereof may not be provided. In the accompanying drawings, the size of each structure is exaggeratedly illustrated for clarity of the present disclosure.

[0074] It will be understood that although the terms "first" and / or "second" etc. may be used herein to describe one or more appropriate components, 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 example embodiments of the present disclosure, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include plural forms.

[0075] In the present application, it will be understood that the terms “include,” “includes,” “including,” “comprise,” “comprises,” “comprising,” “have,” “has,” and / or “having” and the like indicate the presence of features, numbers, steps, operations, components, parts, or any 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 any combination thereof.

[0076] In the present application, when a layer, film, region or plate is referred to as being "on" another layer, film, region or plate or "on 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 intervening layers, films, regions or plates. In contrast, when a layer, film, region or plate is referred to as being "below" another layer, film, region or plate or "on the lower part of" another layer, film, region or plate, it may not only be directly below the layer, film, region or plate, but also there may be intervening layers, films, regions or plates. It will be understood that when a component is referred to as being "on" another component, it may be arranged above the other component, or it may also be arranged below the other component.

[0077] For example, for ease of description, terms such as "below," "above," and / or "on" are used herein to describe the relationship of one element to another element as illustrated in the accompanying drawings. These terms are relative concepts and are described based on the directions indicated in the accompanying drawings. It will be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation other than the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, the element described as "below" other elements or features will then be oriented "above" or "on" the other elements or features. Therefore, the term "below" can encompass both orientations above and below. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used in this article should be interpreted accordingly.

[0078] As utilized herein, the terms "use," "using," and "used" may be considered synonymous with the terms "utilize," "utilizing," and "utilized," respectively.

[0079] As utilized herein, expressions such as “at least one of,” “one of,” “selected from,” and “selected from,” when preceding / following a list of elements, modify the entire list of elements and do not modify the individual elements of the list. For example, the expressions “at least one of a through c” and “at least one of a, b, and c” may indicate only a, only b, only c, both a and b (e.g., a and b simultaneously), both a and c (e.g., a and c simultaneously), both b and c (e.g., b and c simultaneously), all of a, b, and c, or variations thereof.

[0080] The term "and / or" includes all combinations of one or more of the associated listed elements.

[0081] As used herein, the term "may" will be understood to refer to "one or more embodiments of the present disclosure," some of which include the described elements, and some of which do not include the elements and / or include alternative elements. Similarly, optional language such as "or" refers to "one or more embodiments of the present disclosure" that each include the corresponding enumerated items.

[0082] Unless otherwise defined, all terms (including chemical terms, technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which the present disclosure belongs. It will 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 field and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

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

[0084] As utilized herein, the phrase “on a plane” or “plan view” refers to observing a target portion from the top, and the phrase “in 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 a component or any component", "excludes a component or any component" and / or "does not contain a component" and the like means that the "component" is not added, selected or utilized as a component in the composition, but due to other impurities and / or external factors, the "component" may still be included in an appropriate amount.

[0086] limited

[0087] In the specification, the term "substituted or unsubstituted" may refer to unsubstituted or substituted by at least one substituent (e.g., selected from at least one substituent) in the group including (e.g., consisting of) deuterium atoms, halogen atoms, cyano groups, nitro groups, amino groups, amine groups, silyl groups, oxy groups, sulfenyl groups, sulfinyl groups, sulfonyl groups, carbonyl groups, boron groups, phosphine oxide groups, phosphine sulfide groups, alkyl groups, alkenyl groups, alkynyl groups, hydrocarbon ring groups, aryl groups, and heterocyclic groups. In one or more embodiments, each of the substituents exemplified above may be substituted or unsubstituted. For example, biphenyl groups may be interpreted as aryl groups or phenyl groups substituted by phenyl groups.

[0088] In the specification, the phrase "bonded to an adjacent group to form a ring" may refer to a group bonding 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 one or more 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 closest 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 one or more 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 linear or branched. The number of carbon atoms 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 methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, isobutyl, 2-ethylbutyl, 3,3-dimethylbutyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, 1-methylpentyl, 3-methylpentyl, 2-ethylpentyl, 4-methyl-2-pentyl, n-hexyl, 1-methylhexyl, 2-ethylhexyl, 2-butylhexyl, n-heptyl, 1-methylheptyl, 2,2-dimethylheptyl, 2-ethylheptyl, 2-butylheptyl, n-octyl, tert-octyl, 2-ethyloctyl, 2-butyloctyl, 2-hexyloctyl, 3,7-dimethyloctyl, n-nonyl, n-decyl, adamantyl, 2-ethyldecyl, 2-butyldecyl, 2-hexyldecyl, 2-octyldecyl, n-undecyl, n-Dodecyl, 2-ethyldodecyl, 2-butyldodecyl, 2-hexyldodecyl, 2-octyldodecyl, n-tridecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, 2-ethylhexadecyl, 2-butylhexadecyl, 2-hexylhexadecyl, 2-octylhexadecyl, n-heptadecyl, n-octadecyl, n-nonadecyl, n-eicosyl, 2-ethyleicosyl, 2-butyleicosyl, 2-hexyleicosyl, 2-octyleicosyl, n-heonicosyl, n-docosyl, n-tricosyl, n-tetracosyl, n-pentacosyl, n-hexacosyl, n-heptacosyl, n-octacosyl, n-nonacosyl and / or n-triacontyl, etc., but embodiments of the present disclosure are not limited thereto.

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

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

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

[0095] In the specification, the hydrocarbon ring group 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, aryl refers to any functional group or substituent derived from an aromatic hydrocarbon ring. The aryl may be a monocyclic aryl or a polycyclic aryl. The number of ring carbon atoms in the aryl may be 6 to 30, 6 to 20, or 6 to 15. Examples of aryl may include phenyl, naphthyl, fluorenyl, anthracenyl, phenanthrenyl, biphenyl, terphenyl, quaterphenyl, pentaphenyl, hexaphenyl, triphenylene, pyrenyl, benzofluoranthenyl and / or 1,2-triphenylenyl, etc., but 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 the substituted fluorenyl group are as follows. However, the embodiments of the present disclosure are not limited thereto.

[0098]

[0099] In this article, heterocyclic groups refer to any functional group or substituent derived from a ring containing at least one of B, O, N, P, Si, S and Se as a heteroatom. Heterocyclic groups include aliphatic heterocyclic groups and aromatic heterocyclic groups. Aromatic heterocyclic groups can be heteroaryl groups. Aliphatic heterocyclic groups and aromatic heterocyclic groups can be monocyclic or polycyclic.

[0100] In the specification, the heterocyclic group may contain at least one of B, O, N, P, Si, S and Se 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 include at least one of B, O, N, P, Si, S and Se as a heteroatom. The number of ring-forming 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 pyrrolidinyl group, a piperidinyl group, a tetrahydrofuranyl group, a tetrahydrothienyl group, a thianyl group, a tetrahydropyranyl group and / or a 1,4-dioxanyl group, etc., 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, S and Se as a heteroatom. 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 heteroaryl groups may include thienyl, furyl, pyrrolyl, imidazolyl, pyridyl, bipyridyl, pyrimidyl, triazine, triazolyl, acridinyl, pyridazinyl, pyrazinyl, quinolyl, quinazolinyl, quinoxalinyl, phenoxazinyl, phthalazinyl, pyridopyrimidinyl, pyridopyrazinyl, pyrazinopyrazinyl, isoquinolyl, indolyl, carbazolyl, N-arylcarbazolyl, N-heteroarylcarbazolyl, N-alkylcarbazolyl, benzoxazolyl, benzimidazolyl, benzothiazolyl, benzocarbazolyl, benzothienyl, dibenzothienyl, thienothiphenyl, benzofuranyl, phenanthrolinyl, thiazolyl, isoxazolyl, oxazolyl, oxadiazolyl, thiadiazolyl, phenothiazinyl, dibenzothirolyl and / or dibenzofuranyl, but embodiments of the present disclosure are not limited thereto.

[0103] In the specification, the aforementioned description of the aryl group can be applied to the arylene group except that the arylene group is a divalent group. The aforementioned description of the heteroaryl group can be applied to the heteroarylene group except that the heteroarylene group is a divalent group.

[0104] In the specification, silyl includes alkylsilyl and arylsilyl. The alkyl in the alkylsilyl may be a linear group, a branched group or a cyclic group. The number of carbon atoms in the alkylsilyl is not specifically limited, but may be, for example, 1 to 20 or 1 to 10. The number of carbon atoms in the arylsilyl is not specifically limited, but may be, for example, 6 to 30, 6 to 20 or 6 to 15. Examples of silyl may include trimethylsilyl, triethylsilyl, tert-butyldimethylsilyl, vinyldimethylsilyl, propyldimethylsilyl, triphenylsilyl, diphenylsilyl and / or phenylsilyl, etc., but embodiments of the present disclosure are not limited thereto.

[0105] In the specification, the number of 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. 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 thio group may include an alkylthio group and an arylthio group. The thio group may refer to a sulfur atom bonded to an alkyl group or an aryl group as defined herein. The alkyl group in the alkylthio group may be a straight chain group, a branched chain group or a cyclic group. The number of carbon atoms in the alkylthio group is not specifically limited, but may be, for example, 1 to 20 or 1 to 10. The number of carbon atoms in the arylthio group is not specifically limited, but may be, for example, 6 to 30, 6 to 20 or 6 to 15. Examples of thio groups may include methylthio, ethylthio, propylthio, pentylthio, hexylthio, octylthio, dodecylthio, cyclopentylthio, cyclohexylthio, phenylthio, naphthylthio, but 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 or aryl group as defined herein. The oxy group may include an alkoxy group and an aryloxy group. The number of carbon atoms in the aryloxy group is not specifically limited, but may be, for example, 6 to 30, 6 to 20, or 6 to 15. The alkoxy group may be a straight chain group, a branched chain group, or a cyclic group. The number of carbon atoms in the alkoxy group is not specifically 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, and / or benzyloxy, etc., but embodiments of the present disclosure are not limited thereto.

[0110] The boryl group herein may refer to a boron atom bonded to an alkyl group or an aryl group as defined herein. Boryl groups include alkyl boryl groups and aryl boryl groups. The alkyl group in the alkyl boryl group may be a linear group, a branched group or a cyclic group. The number of carbon atoms in the alkyl boryl group is not specifically limited, but may be, for example, 1 to 20 or 1 to 10. The number of carbon atoms in the aryl boryl group is not specifically limited, but may be, for example, 6 to 30, 6 to 20 or 6 to 15. Examples of boryl groups may include dimethyl boryl, tert-butyl methyl boryl, diphenyl boryl and / or phenyl boryl, 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 specifically limited, but may be 1 to 30. The amine group may include an alkylamine group and an arylamine group. The alkyl group in the alkylamine group may be a linear group, a branched group, or a cyclic group. The number of carbon atoms in the alkylamine group is not specifically limited, but may be, for example, 1 to 20 or 1 to 10. The number of carbon atoms in the arylamine group is not specifically limited, but may be, for example, 6 to 30, 6 to 20, or 6 to 15. Examples of the amine group may include a methylamine group, a dimethylamine group, a phenylamine group, a diphenylamine group, a naphthylamine group, and / or a 9-methyl-anthrylamine group, etc., but embodiments of the present disclosure are not limited thereto.

[0112] In the specification, the sulfinyl group may mean an alkyl group or an aryl group defined above combined with -S(=O)-. The number of carbon atoms of the sulfinyl group is not particularly limited, but may be 1 to 30, 1 to 20, or 1 to 10. The sulfinyl group may include an alkylsulfinyl group and an arylsulfinyl group. For example, the sulfinyl group may have the following structure, but is not limited thereto.

[0113]

[0114] In the specification, sulfonyl may refer to -S(=O) 2 - combined with the above-defined alkyl or aryl groups. The number of carbon atoms of the sulfonyl group is not particularly limited, but may be 1 to 30, 1 to 20, or 1 to 10. The sulfonyl group may include an alkylsulfonyl group and an arylsulfonyl group. For example, the sulfonyl group may have the following structure, but is not limited thereto.

[0115]

[0116] In the specification, the phosphine oxide group may mean an alkyl group or an aryl group defined above combined with -P(=O)-. The number of carbon atoms of the phosphine oxide group is not particularly limited, but may be 1 to 30, 1 to 20, or 1 to 10. The phosphine oxide group may include an alkyl phosphine oxide group and an aryl phosphine oxide group. For example, the phosphine oxide group may have the following structure, but is not limited thereto.

[0117]

[0118] In the specification, the phosphinosulfide group may mean an alkyl or aryl group defined above in combination with -P(=S)-. The number of carbon atoms of the phosphinosulfide group is not particularly limited, but may be 1 to 30, 1 to 20, or 1 to 10. The phosphinosulfide group may include an alkylphosphinosulfide group and an arylphosphinosulfide group. For example, the phosphinosulfide group may have the following structure, but is not limited thereto.

[0119]

[0120] In the specification, the alkyl group in the alkoxy group, alkylthio group, alkylsulfonyl group, alkylsulfinyl group, alkylaryl group, alkylamino group, alkylboryl group, alkylsilyl group, alkylphosphine oxide group, alkylphosphine sulfide group and alkylamine group is the same as the examples of the alkyl group described herein.

[0121] In the specification, the aryl group in the aryloxy group, arylthio group, arylsulfonyl group, arylsulfinyl group, arylamino group, arylboryl group, arylsilyl group, arylphosphine oxide group, arylphosphine sulfide group and arylamine group is the same as the examples of the aryl group described herein.

[0122] In the specification, a direct connection may refer to a single bond.

[0123] In one or more embodiments, in the specification, and "-*" refers to the location to be linked.

[0124] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0125] Display device

[0126] Figure 1 A plan view of a display device DD for explaining one or more embodiments. Figure 2 is a cross-sectional view of a display device DD according to an embodiment. Figure 2 To explain along Figure 1 A cross-sectional view of the portion taken along line II' in FIG.

[0127] The display device DD may include a display panel DP and an optical layer PP arranged on the display panel DP. The display panel DP includes light emitting elements ED-1, ED-2, and ED-3. The display device DD may include a plurality of light emitting elements ED-1, ED-2, and ED-3. The optical layer PP may be arranged on the display panel DP to control light reflected in the display panel DP due to external light. The optical layer PP may include, for example, a polarizing layer or a color filter layer. In one or more embodiments, unlike the configuration illustrated in the drawings, the display device DD of one or more embodiments may not provide the optical layer PP.

[0128] The base substrate BL may be disposed on the optical layer PP. The base substrate BL may be a member that provides a base surface on which the optical layer PP is disposed. The base substrate BL may be a glass substrate, a metal substrate, and / or 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 a composite material layer. In one or more embodiments, unlike the configuration illustrated in the drawings, in one or more embodiments, the base substrate BL may not be provided.

[0129] The display device DD according to one or more embodiments may further include a filling layer. The filling layer may be arranged between the display device 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 acrylic resin, silicone resin and epoxy resin (for example, at least one selected from acrylic resin, silicone resin and epoxy resin).

[0130] The display panel DP may include a base layer BS, a circuit layer DP-CL provided on the base layer BS, and a display device layer DP-ED. The display device layer DP-ED may include a pixel defining layer PDL, light emitting elements ED-1, ED-2, and ED-3 arranged between a plurality of portions of the pixel defining layer PDL, and an encapsulation layer TFE arranged on the light emitting elements ED-1, ED-2, and ED-3.

[0131] The base layer BS may be a member providing a base surface on which the display device layer DP-ED is arranged. The base layer BS may be a glass substrate, a metal substrate, and / or 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 a composite material layer.

[0132] In one or more embodiments, the circuit layer DP-CL is arranged on the base layer BS, and the circuit layer DP-CL may include a plurality of transistors. Each of the plurality of 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 elements ED-1, ED-2, and ED-3 of the display device layer DP-ED.

[0133] Each of the light emitting elements ED-1, ED-2 and ED-3 may have a configuration as described in more detail elsewhere herein according to Figures 3 to 7 Each of the light emitting elements ED-1, ED-2 and ED-3 may include a first electrode EL1, a hole transport region HTR, emission layers EML-R, EML-G and EML-B, an electron transport region ETR and a second electrode EL2.

[0134] Figure 2 One or more embodiments are explained in which the emission layers EML-R, EML-G and EML-B of the light emitting elements ED-1, ED-2 and ED-3 are arranged in the opening OH defined in the pixel defining layer PDL, and the hole transport region HTR, the electron transport region ETR and the second electrode EL2 are provided as a common layer in the entire light emitting elements ED-1, ED-2 and ED-3. However, the embodiments of the present disclosure are not limited thereto, and Figure 2 Different from the configuration explained in the above, the hole transport region HTR and the electron transport region ETR in one or more embodiments may be provided by patterning in the opening OH defined in the pixel defining layer 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 elements ED-1, ED-2, and ED-3 in one or more embodiments may be provided by patterning using an inkjet printing method.

[0135] The encapsulation layer TFE may cover the light-emitting elements ED-1, ED-2 and ED-3. The encapsulation layer TFE may seal the light-emitting elements ED-1, ED-2 and ED-3 in the display device 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.

[0136] The encapsulation-inorganic film protects the display device layer DP-ED from moisture and / or oxygen, and the encapsulation-organic film protects the display device layer DP-ED from foreign substances (e.g., dust particles). The encapsulation-inorganic film may include silicon nitride, silicon oxynitride, silicon oxide, titanium oxide and / or aluminum oxide, etc., but the embodiments of the present disclosure are not specifically limited thereto. The encapsulation-organic film may include acrylic compounds and / or epoxy compounds, etc. The encapsulation-organic film may include a photopolymerizable organic material, but the embodiments of the present disclosure are not specifically limited thereto.

[0137] The encapsulation layer TFE may be disposed on the second electrode EL2 and may be disposed to fill the open holes OH.

[0138] refer to Figure 1 and Figure 2 , the display device DD may include one or more 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 elements ED-1, ED-2, and ED-3 is emitted. The light emitting areas PXA-R, PXA-G, and PXA-B may be separated and / or spaced apart from each other on a plane (e.g., in a plan view).

[0139] Each of the light-emitting areas PXA-R, PXA-G, and PXA-B may be an area divided (i.e., defined) by the pixel defining layer PDL. The non-light-emitting area NPXA may be an area between adjacent light-emitting areas PXA-R, PXA-G, and PXA-B, corresponding to the pixel defining layer PDL. In one or more embodiments, in the specification, the light-emitting areas PXA-R, PXA-G, and PXA-B may correspond to pixels, respectively. The pixel defining layer PDL may divide the light-emitting elements ED-1, ED-2, and ED-3. The emission layers EML-R, EML-G, and EML-B of the light-emitting elements ED-1, ED-2, and ED-3 may be arranged in the openings OH defined in the pixel defining layer PDL and separated from each other.

[0140] 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 from the light emitting elements ED-1, ED-2, and ED-3. Figure 1 and Figure 2 In the display device DD of one or more embodiments illustrated in , three light emitting areas PXA-R, PXA-G, and PXA-B that emit red light, green light, and blue light, respectively, are schematically 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.

[0141] In the display device DD according to one or more embodiments, a plurality of light emitting elements ED-1, ED-2, and ED-3 may emit light beams having different wavelengths from each other. For example, in one or more embodiments, the display device DD may include a first light emitting element ED-1 emitting red light, a second light emitting element ED-2 emitting green light, and a third light emitting element ED-3 emitting 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 element ED-1, the second light emitting element ED-2, and the third light emitting element ED-3, respectively.

[0142] However, the embodiments of the present disclosure are not limited thereto, and the first to third light emitting elements ED-1, ED-2, and ED-3 may emit light beams in substantially the same wavelength range or at least one light emitting element may emit light beams in a wavelength range different from the other wavelength ranges. For example, the first to third light emitting elements ED-1, ED-2, and ED-3 may all emit blue light.

[0143] 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 be arranged along the second direction axis DR2. In one or more 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.

[0144] Figure 1 and Figure 2It is explained that all the light emitting regions PXA-R, PXA-G, and PXA-B have the same area, 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 viewed on a plane defined by the first direction axis DR1 and the second direction axis DR2. The third direction axis DR3 may be perpendicular to the plane defined by the first direction axis DR1 and the second direction axis DR2.

[0145] In one or more embodiments, the arrangement of the light-emitting areas PXA-R, PXA-G, and PXA-B is not limited to Figure 1 The configuration explained in the above description may be used, and the order of arranging the red light emitting areas PXA-R, the green light emitting areas PXA-G, and the blue light emitting areas PXA-B may be provided in one or more appropriate combinations according to the characteristics of the display quality desired or required in the display device DD. For example, the arrangement form of the light emitting areas PXA-R, PXA-G, and PXA-B may be a honeycomb. Layout or diamond ) layout form, ( and Diamond is a registered trademark owned by Samsung Display Co., Ltd.).

[0146] In one or more 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.

[0147] Below, Figures 3 to 7 Each of the light emitting elements ED according to 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.

[0148] and Figure 3 compared to, Figure 4 A cross-sectional view of a light emitting element 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 5A cross-sectional view of a light emitting element 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 3 compared to, Figure 6 A cross-sectional view of a light emitting element ED of 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 emission auxiliary layer EAL, 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 7 A cross-sectional view of a light emitting element ED according to one or more embodiments including a capping layer CPL disposed on the second electrode EL2 is illustrated.

[0149] The first electrode EL1 has conductivity (for example, is a conductor). The first electrode EL1 may be formed of 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 one or more embodiments, the first electrode EL1 may be a pixel electrode. The first electrode EL1 may be a transmissive electrode, a transflective 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, a compound selected from two or more of these (among them), a mixture selected from two or more of these (among them), and / or an oxide thereof.

[0150] 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 transflective electrode or a reflective electrode, the first electrode EL1 may include Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF, Mo, Ti, W, a compound thereof or a mixture thereof (e.g., any appropriate compound thereof or a mixture thereof) (e.g., a mixture of Ag and Mg), or a material having a multilayer structure, such as LiF / Ca (a stacked structure of LiF and Ca) or LiF / Al (a stacked structure of LiF and Al). In one or more embodiments, the first electrode EL1 may have a multilayer structure including a reflective film or a transflective film formed of the materials described herein, and a transparent conductive film formed of ITO, IZO, ZnO, and / or 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 one or more 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 metal materials described herein, and / or an oxide of the metal material described herein, etc. The thickness of the first electrode EL1 may be about 700 angstroms. to about For example, the thickness of the first electrode EL1 may be about to about

[0151] The 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, an emission auxiliary layer EAL, and an electron blocking layer EBL. The thickness of the hole transport region HTR may be, for example, about 100 Å. to about The emission assistance layer EAL may be referred to as a buffer layer.

[0152] The hole transport region HTR may have a single layer formed of a single material, a single layer formed of a plurality of different materials, or a multi-layered structure including a plurality of layers formed of a plurality of different materials.

[0153] 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 formed of a hole injection material and a hole transport material. In one or more embodiments, the hole transport region HTR may have a single-layer structure 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 / emission auxiliary layer EAL, hole injection layer HIL / emission auxiliary layer EAL, hole transport layer HTL / emission auxiliary layer EAL, or hole injection layer HIL / hole transport layer HTL / emission auxiliary layer EBL are stacked in sequence from the first electrode EL1, but the embodiments of the present disclosure are not limited thereto.

[0154] The hole transport region HTR may be formed using one or more appropriate methods such as vacuum deposition, spin coating, casting, Langmuir-Brokett (LB), inkjet printing, laser printing, and laser induced thermal imaging (LITI).

[0155] The hole transport region HTR may include a compound represented by Formula H-1.

[0156] Formula H-1

[0157]

[0158] In formula H-1, L 1 and L 2 Each of a and b may be independently a directly connected, 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 selected from 0 to 10. In one or more embodiments, when a or b is an integer of 2 or more, a plurality of L 1 or more 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.

[0159] 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. In one or more embodiments, in formula H-1, Ar 3 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.

[0160] The compound represented by formula H-1 may be a monoamine compound. In one or more embodiments, the compound represented by formula H-1 may be a compound wherein Ar 1 To Ar 3 In one or more embodiments, the compound represented by formula H-1 may be a diamine compound in which Ar 1 and Ar 2 A carbazole compound comprising a substituted or unsubstituted carbazole group in at least one of the following: 1 and Ar 2 A fluorene compound in which at least one of the compounds includes a substituted or unsubstituted fluorenyl group.

[0161] The compound represented by Formula H-1 may be selected from any one (eg, one) of the compounds in 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 in Compound Group H.

[0162] Compound Group H

[0163]

[0164]

[0165] The hole transport region HTR may include a phthalocyanine compound (eg, copper phthalocyanine), N 1 ,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-1-yl)-N,N'-diphenyl-benzidine (NPB), triphenylamine-containing polyetherketone (TPAPEK), 4-isopropyl-4'-methyldiphenyliodonium [tetrakis(pentafluorophenyl)borate] and dipyrazino[2,3-f:2',3'-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (HAT-CN), etc.

[0166] The hole transport region HTR may include at least one selected from carbazole derivatives (e.g., N-phenylcarbazole or polyvinylcarbazole), fluorene derivatives and triphenylamine derivatives (e.g., N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (TPD), 4,4',4"-tri(N-carbazolyl)triphenylamine (TCTA), N,N'-di(naphthalene-1-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) or 1,3-bis(N-carbazolyl)benzene (mCP)).

[0167] In one or more 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) and / or 1,3-bis(1,8-dimethyl-9H-carbazole-9-yl)benzene (mDCP), etc.

[0168] The hole transport region HTR may include a compound of the hole transport region HTR described herein in at least one of the hole injection layer HIL, the hole transport layer HTL, the emission auxiliary layer EAL, and the electron blocking layer EBL.

[0169] 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 100 nm. 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, if the hole transport region HTR includes the electron blocking layer EBL (eg, 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 thickness of the hole transport region HTR, the thickness of the hole injection layer HIL, the thickness of the hole transport layer HTL, and the thickness of the electron blocking layer EBL satisfy the described ranges, satisfactory hole transport characteristics can be achieved without significantly increasing the driving voltage.

[0170] In addition to the materials described herein, the hole transport region HTR may further include a charge generation material to increase conductivity. The charge generation material may be uniformly (substantially uniformly) or non-uniformly (substantially non-uniformly) dispersed in the hole transport region HTR. The charge generation material may be, for example, a p-dopant. The p-dopant may include at least one of a metal halide, a quinone derivative, a metal oxide, and a cyano-containing compound, but the embodiments of the present disclosure are not limited thereto. For example, the p-dopant may include a metal halide (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) and / or a cyano-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]cyclopropyl]-cyanomethyl]-2,3,5,6-tetrafluorobenzonitrile (NDP9)), etc., but the embodiments of the present disclosure are not limited thereto.

[0171] 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 an emission auxiliary layer EAL and an electron blocking layer EBL. The emission auxiliary layer EAL may compensate for the resonance distance according to the wavelength of the light emitted from the emission layer EML, and adjust the charge balance to increase the luminous efficiency. In one or more embodiments, the emission auxiliary layer EAL may be used to prevent or reduce the injection of electrons into the hole transport region HTR. The material that may be included in the hole transport region HTR may be included in the emission auxiliary layer EAL. The electron blocking layer EBL is a layer for preventing or reducing the injection of electrons from the electron transport region ETR into the hole transport region HTR.

[0172] Polycyclic compounds

[0173] The light-emitting element ED according to one or more embodiments may contain a first compound as a polycyclic compound of the present disclosure. According to one or more embodiments, the first compound (i.e., the polycyclic compound) may be included in at least one of the functional layers (i.e., the hole transport region HTR, the emission layer EML, and the electron transport region ETR) selected between the first electrode EL1 and the second electrode EL2. In one or more embodiments, the first compound may be contained in at least one selected from the emission layer EML and the electron transport region ETR.

[0174] In one or more embodiments, the first compound included (e.g., contained) in the emission layer EML may be used as a host material. In the light-emitting element ED according to one or more embodiments, the emission layer EML may include the first compound and a second compound as a phosphorescent dopant. In one or more embodiments, the second compound may be an organic metal compound.

[0175] The light emitting element ED according to one or more embodiments may further include a third compound as a host material in the emission layer EML in addition to the first compound. In one or more embodiments, the third compound may include a tricyclic condensed ring including a nitrogen atom as a ring-forming atom.

[0176] In one or more embodiments, in addition to the first compound, the second compound, and the third compound, the light-emitting element ED according to one or more embodiments may further include a fourth compound as a delayed fluorescence dopant (also referred to as an emission dopant). For example, the fourth compound may be a thermally activated delayed fluorescence (TADF) dopant. The second compound to the fourth compound are described in more detail elsewhere herein.

[0177] The light emitting element ED according to one or more embodiments may include a first compound as a polycyclic compound according to one or more embodiments in the electron transport region ETR. For example, in one or more embodiments, the first compound may be included in the electron transport layer ETL and / or the hole blocking layer HBL, etc.

[0178] The first compound as the polycyclic compound according to one or more embodiments may be an electron transport compound. The polycyclic compound according to one or more embodiments may include a condensed ring containing Si and N as ring atoms and a heteroaryl ring in which two or more carbon atoms of a benzene ring are replaced by N. The condensed ring may include a group represented by FG1, and the heteroaryl ring may include a group represented by FG2.

[0179] FG1

[0180]

[0181] FG2

[0182]

[0183] The group represented by FG2 may be bonded to at least one (e.g., any one) position selected from ST1 to ST5 of the group represented by FG1. The group represented by FG1 may be bonded to at least one (e.g., any one) position selected from ST-a to ST-c of the group represented by FG2. Among the groups represented by FG2, the group selected from X 1 To X 3Two or more of may be N, and the rest (e.g., selected from X 1 To X 3 Any remaining ) in may be CH or CD in which the H is replaced by a deuterium atom.

[0184] The polycyclic compound according to one or more embodiments may have a structure in which at least one group represented by FG1 and at least one group represented by FG2 are bonded. For example, the polycyclic compound according to one or more embodiments may include one group represented by FG1 and one group represented by FG2, one group represented by FG1 and two groups represented by FG2, or one group represented by FG2 and two groups represented by FG1.

[0185] The polycyclic compound according to one or more embodiments may include at least one group represented by FG1, thereby having a bulky three-dimensional structure. Due to the bulky three-dimensional structure, the polycyclic compound according to one or more embodiments may have less interaction with other compounds used together in substantially the same layer.

[0186] For example, the polycyclic compound according to one or more embodiments may include a condensed ring in which a silyl group containing Si is bonded to a carbazole group to form a ring. Compared with the case in which the compound includes a substituent such as a triphenylsilyl group (not forming a ring), the polycyclic compound according to one or more embodiments may have high three-dimensional steric hindrance properties to adjacent compound molecules due to the condensed ring. As a result, compared with the compound in which the triphenylsilyl group does not form a ring, the polycyclic compound according to one or more embodiments (containing a silyl group to form a condensed ring) may have less interaction with adjacent compound molecules.

[0187] When the polycyclic compound according to one or more embodiments is included in the emission layer EML and used as a host material, the polycyclic compound according to one or more embodiments may have less interaction with the dopant material included in the emission layer EML due to the bulky three-dimensional structure. As a result, the polycyclic compound according to one or more embodiments has no effect on the emission characteristics of the dopant, and the light-emitting element ED according to one or more embodiments including the polycyclic compound according to one or more embodiments in the emission layer EML may exhibit excellent or appropriate color reproducibility. In one or more embodiments, the polycyclic compound according to one or more embodiments includes a silyl group, thereby having bipolar characteristics, and thus may exhibit excellent or appropriate material stability. Due to the excellent or appropriate material stability of the polycyclic compound according to one or more embodiments, the light-emitting element ED according to one or more embodiments including it may also have an improved element life (also referred to as lifespan).

[0188] The polycyclic compound according to one or more embodiments may be represented by Formula 1.

[0189] Formula 1

[0190]

[0191] In Formula 1, R 1 To R 5 At least one (e.g., one or two) of the above may be represented by Formula 2, and the remaining (e.g., selected from R 1 To R 5 Any remaining ) may be a hydrogen atom or a deuterium atom. 1 To R 5 One or two of the substituents may be a substituent represented by Formula 2, and the remaining substituents (e.g., selected from R 1 To R 5 Any remaining ) may be hydrogen atoms or deuterium atoms.

[0192] In one or more embodiments, in the polycyclic compound represented by Formula 1, at least one hydrogen atom in the remaining substituents except the substituent represented by Formula 2 may be substituted with a deuterium atom. In one or more embodiments, at least one hydrogen atom in the substituent represented by Formula 2 may be substituted with a deuterium atom.

[0193] Formula 2

[0194]

[0195] In formula 2, X 1 To X 3 may be independently N, CH or CD, and X 1 To X 3 Two or more of may be N. In one or more embodiments, the substituent represented by Formula 2 may be wherein all X 1 To X 3 All are triazine moieties of N or selected from X 1 To X 3 Two of them are pyrimidine parts of N.

[0196] In formula 2, L 1 and L 2 and L may each independently be a directly linked, substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 3 to 30 ring carbon atoms. 1 and L 2 Each independently may be directly connected and / or substituted or unsubstituted phenylene, etc., but one or more embodiments of the present disclosure are not limited thereto. In one or more embodiments, if L 1 or L2 is a substituted or unsubstituted arylene group or a substituted or unsubstituted heteroarylene group (for example, when L 1 or L 2 is a substituted or unsubstituted arylene group or a substituted or unsubstituted heteroarylene group), L 1 or L 2 At least one of the hydrogen atoms may be replaced by a deuterium atom.

[0197] In formula 2, A 1 and A 2 Each may be independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 30 ring carbon atoms, or a substituted or unsubstituted silyl group. In one or more embodiments, the heterocyclic group may be an aliphatic heterocyclic group or an aromatic heterocyclic group.

[0198] For example, in one or more embodiments, A 1 and A 2 Each may independently be a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazolyl group, or a substituted or unsubstituted triphenylsilyl group, or may be represented by the formula SG.

[0199] In one or more embodiments, selected from A 1 and A 2 One or more (e.g., any one) of the formula SG may be represented by the formula, and the remaining (e.g., selected from A 1 and A 2 Any remaining ) in may not be represented by the formula SG, and may be a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 30 ring carbon atoms, or a substituted or unsubstituted silyl group. 1 and A 2 One or more (e.g., any one) of the formula SG may be represented by the formula, and the remaining (e.g., selected from A 1 and A 2 Any remaining ) in may be a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazolyl group, or a substituted or unsubstituted triphenylsilyl group.

[0200] Formula SG

[0201]

[0202] When A 1 and A 2 When each is independently represented by the formula SG, selected from C 1 To C 5 Any ring in L 1 or L 2Bonding.

[0203] In Formula 2, -* is a part connected to Formula 1

[0204] In one or more embodiments, Formula 2 may be represented by Formula 2-1 or Formula 2-2.

[0205] Formula 2-1

[0206]

[0207] Formula 2-2

[0208]

[0209] In formula 2-2, X 11 In Formula 2-1 and Formula 2-2, the same description as in Formula 2 can be applied to L 1 , L 2 , A 1 , A 2 In Formula 2-1 and Formula 2-2, A 1 and A 2 One or more (e.g., any one) of the above-described formula SG may be represented by the above-described formula, and the remaining (e.g., selected from A 1 and A 2 Any remaining ) in may not be represented by the formula SG, and may be a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 30 ring carbon atoms, or a substituted or unsubstituted silyl group. 1 and A 2 One or more (e.g., any one) of the formula SG may be represented by the formula, and the remaining (e.g., selected from A 1 and A 2 Any remaining ) in may be a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazolyl group, or a substituted or unsubstituted triphenylsilyl group.

[0210] In one or more embodiments, in Formula 2-2 according to one or more embodiments, A 1 It can be expressed by the formula SG, and A 2 It may be represented by a substituted or unsubstituted aryl group having 6 to 60 ring carbon atoms (eg, not of the formula SG), a substituted or unsubstituted heterocyclic group having 3 to 30 ring carbon atoms, or a substituted or unsubstituted silyl group.

[0211] In the polycyclic compound according to one or more embodiments including the structures of Formula 1 and Formula 2, at least one hydrogen atom may be substituted with a deuterium atom. In this case, at least one hydrogen atom in the substituent group connected to the structures of Formula 1 and Formula 2 may also be substituted with a deuterium atom.

[0212] The polycyclic compound according to one or more embodiments may be selected from any one of the compounds of Compound Group 1. The light emitting element ED according to one or more embodiments may include at least one selected from the compounds of Compound Group 1. In Compound Group 1, D is a deuterium atom.

[0213] The light emitting element ED according to one or more embodiments may include at least one of the compounds selected from the compound group 1 in the emission layer EML. However, one or more embodiments of the present disclosure are not limited thereto, and the light emitting element ED according to one or more embodiments may include at least one of the compounds selected from the compound group 1 in the electron transport region ETR.

[0214] Compound Group 1

[0215]

[0216]

[0217]

[0218]

[0219]

[0220]

[0221]

[0222]

[0223]

[0224]

[0225]

[0226]

[0227]

[0228]

[0229] The polycyclic compound according to one or more embodiments has a bulky three-dimensional structure, and due to the bulky three-dimensional structure, the interference with the adjacent compound molecules can be minimized or reduced. Therefore, the interaction between the polycyclic compound and other types (kinds) of compounds included in substantially the same layer can be reduced.

[0230] Because the polycyclic compound according to one or more embodiments has a high triplet energy level (T1 energy level) and can therefore be used as a host material. The polycyclic compound according to one or more embodiments may be included in the emission layer EML with a phosphorescent dopant or a fluorescent dopant, and the polycyclic compound according to one or more embodiments may be used as a host material. For example, the polycyclic compound according to one or more embodiments may be used as a phosphorescent host.

[0231] The emission layer EML of the light emitting element ED including the polycyclic compound according to one or more embodiments may emit blue light. For example, the emission layer EML including the polycyclic compound according to one or more embodiments may emit deep blue light.

[0232] In one or more embodiments, in the polycyclic compound according to one or more embodiments, at least one hydrogen atom may be substituted with a deuterium atom, and the polycyclic compound substituted with the deuterium atom may exhibit a high T1 energy level of about 2.8 electron volts (eV) or more.

[0233] For example, the polycyclic compound according to one or more embodiments contains Si, thereby having a three-dimensional structure of a cyclized structure, and its planarity can be suppressed or reduced. Therefore, intermolecular interactions can be reduced, and excellent or appropriate material stability can be exhibited.

[0234] The light-emitting element ED according to one or more embodiments containing the polycyclic compound according to one or more embodiments may have the characteristics of high luminous efficiency and long life. For example, interference with compounds of other materials is limited, and therefore if the polycyclic compound according to one or more embodiments is included as an emission layer material (for example, when the polycyclic compound according to one or more embodiments is included as an emission layer material), the light-emitting element ED may exhibit excellent or appropriate color reproducibility.

[0235] In the light emitting element ED according to one or more embodiments, the emission layer EML may be a phosphorescent emission layer including a host and a dopant. However, one or more embodiments of the present disclosure are not limited thereto, and the emission layer EML may further include a delayed fluorescence dopant, and the light emitting element ED may emit delayed fluorescence.

[0236] The emission layer EML may include a polycyclic compound according to one or more embodiments as a host. In one or more embodiments, the polycyclic compound may be used as a phosphorescent host (also referred to as an electron transport host material). The emission layer EML may include a polycyclic compound according to one or more embodiments and a phosphorescent dopant. The emission layer EML including the polycyclic compound according to one or more embodiments as a host may emit blue light.

[0237] In one or more embodiments, the emission layer EML may include the polycyclic compound according to one or more embodiments, and may include at least one of second to fourth compounds to be described later. In one or more embodiments, the first compound included in the emission layer EML may be used as an electron transport host material.

[0238] In one or more embodiments, the emission layer EML may include a first compound as a polycyclic compound according to one or more embodiments and a second compound as a phosphorescent dopant. The second compound may be an organic metal complex. For example, the emission layer EML may include an organic metal complex as a second compound, the organic metal complex containing platinum (Pt) as a core metal atom and a ligand bonded to the core metal atom. In the light-emitting element ED according to one or more embodiments, the emission layer EML may contain a compound represented by formula D-1 as a second compound.

[0239] Formula D-1

[0240]

[0241] In formula D-1, Q 1 To Q 4 Each of C1 to C4 may be independently C or N. Each of C1 to C4 may be independently a substituted or unsubstituted hydrocarbon ring group having 5 to 30 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 2 to 30 ring carbon atoms.

[0242] In formula D-1, L 11 To L 13 Can be directly connected, *-O-*, *-S-*, 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, “-*” indicates a portion connected to C1 to C4.

[0243] In Formula D-1, b11 to b13 may each independently be 0 or 1. When b11 is 0, C1 and C2 may not be connected to each other. When b12 is 0, C2 and C3 may not be connected to each other. When b13 is 0, C3 and C4 may not be connected to each other.

[0244] In formula D-1, R 61 To R 66 may be 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-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring-forming carbon atoms. In one or more embodiments, R 61 To R 66 It may bond with an adjacent group to form a ring. 61 To R 66 Each independently may be a substituted or unsubstituted methyl group or a substituted or unsubstituted tert-butyl group.

[0245] In Formula D-1, d1 to d4 may each independently be an integer selected from 0 to 4. In Formula D-1, when d1 to d4 are each independently 0, the second compound may not be R 61 To R 64 wherein d1 to d4 are each independently 4 and R 61 To R 64 The case where each of d1 to d4 is independently a hydrogen atom may be the same as the case where d1 to d4 are independently 0. When d1 to d4 are independently an integer of 2 or more, the plurality of R provided 61 To multiple R 66 Can be the same or multiple R 61 To multiple R 64 At least one of may be different.

[0246] In Formula D-1, C1 to C4 may each independently be a substituted or unsubstituted hydrocarbon ring group or a substituted or unsubstituted heterocyclic group represented by any one of C-1 to C-4.

[0247]

[0248] 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 NR82 , and P 4 Can be C-* or CR 88 . R 71 To R 88 Each may 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 carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms, and / or may bond with an adjacent group to form a ring.

[0249] In one or more embodiments, in C-1 to C-4, The moiety connected to Pt as the core metal atom, "-*" corresponds to the moiety connected to the adjacent ring groups C1 to C4 or the linker L 11 To L 13 part.

[0250] In one or more embodiments, the second compound represented by Formula D-1 may be selected from one or more (e.g., any one) of the compounds present in Compound Group 2. The emission layer EML may include one or more (e.g., any one) of the compounds present in Compound Group 2 as a phosphorescent dopant. However, the phosphorescent dopant is not limited to the compounds in Compound Group 2.

[0251] Compound Group 2

[0252]

[0253]

[0254]

[0255] In the specific example compounds shown in Compound Group 2, "D" refers to a deuterium atom.

[0256] In one or more embodiments, the second compound included in the emission layer EML may be used as a sensitizer (also referred to as an auxiliary dopant). When the emission layer EML includes a first compound as a polycyclic compound according to one or more embodiments, a second compound as an organic metal complex, and a third compound and a fourth compound to be described later, the second compound as a sensitizer may transfer energy to the fourth compound. In this case, the fourth compound as a dopant may emit light.

[0257] In one or more embodiments, the emission layer EML may contain the third compound represented by Formula HT-1. For example, the third compound may be used as a hole transport host material of the emission layer EML.

[0258] Formula HT-1

[0259]

[0260] In formula HT-1, A 1 To A 8 Can be N or CR independently 51 For example, all A 1 To A 8 Can be CR 51 In one or more embodiments, A 1 To A 8 At least one of them may be N, and the rest may be CR 51 .

[0261] In formula HT-1, L 1 It may be a directly linked, 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 connection, a substituted or unsubstituted phenylene group, a substituted or unsubstituted divalent biphenyl group, and / or a substituted or unsubstituted divalent carbazole group, etc., but one or more embodiments of the present disclosure are not limited thereto.

[0262] In formula HT-1, Y a Can be direct connection, CR 52 R 53 or SiR 54 R 55 For example, it may mean that the two benzene rings bonded to the nitrogen atom of formula HT-1 may be directly connected, In formula HT-1, if Y a For direct connection (for example, when Y a The third compound represented by Formula HT-1 may include a carbazole moiety.

[0263] 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 carbazolyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, and / or a substituted or unsubstituted biphenyl group, etc., but one or more embodiments of the present disclosure are not limited thereto.

[0264] In formula HT-1, R 51 To R 55may be 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-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring-forming carbon atoms. In one or more embodiments, R 51 To R 55 Each may be bonded to an adjacent group to form a ring. For example, R 51 To R 55 R may be independently a hydrogen atom or a deuterium atom. 51 To R 55 Each independently may be an unsubstituted methyl group or an unsubstituted phenyl group.

[0265] In one or more embodiments, the third compound represented by Formula HT-1 may be selected from any one (eg, one) of the compounds present in Compound Group 3. The emission layer EML may include at least one (eg, any one) selected from the compounds present in Compound Group 3 as a hole transport host material.

[0266] Compound Group 3

[0267]

[0268]

[0269]

[0270]

[0271] In the specific exemplary compounds shown in compound group 3, "D" may refer to a deuterium atom, and "Ph" may refer to a substituted or unsubstituted phenyl group. For example, in the specific exemplary compounds shown in compound group 3, "Ph" may be an unsubstituted phenyl group.

[0272] In one or more embodiments, a third compound represented by Formula HT-1 may be included as a material of the hole transport region HTR.

[0273] In one or more embodiments, the emission layer EML may further include a fourth compound represented by Formula F-1.

[0274] Formula F-1

[0275]

[0276] In formula F-1, A 1and A 2 can be independently O, S, Se or NR m , and R m R 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. 1a To R 11a They may each independently be a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron 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, and / or may bond with an adjacent group to form a ring.

[0277] In formula F-1, A 1 and A 2 Each of A and B may independently bond to a substituent of an adjacent ring to form a fused ring. 1 and A 2 Can be independently NR m (For example, when A 1 and A 2 Can be independently NR m ), A 1 Can be used with R 4a or R 5a In one or more embodiments, A 2 Can be used with R 7a or R 8a bonded to form a ring.

[0278] For example, the fourth compound represented by Formula F-1 may be included in the emission layer EML as a dopant. In one or more embodiments, the fourth compound represented by Formula F-1 may be a thermally activated delayed fluorescence dopant.

[0279] The fourth compound may be selected from any one (eg, one) of the compounds in Compound Group 4.

[0280] Compound Group 4

[0281]

[0282]

[0283] The fourth compound may be a delayed fluorescence dopant. For example, the fourth compound may be a thermally activated delayed fluorescence dopant. In one or more embodiments, the type (species) of the fourth compound is not limited to the specific example compounds present in compound group 4, and in the case of a delayed fluorescence dopant material, in one or more embodiments, the fourth compound may be included in the emission layer EML as a dopant material together with the polycyclic compound as the first compound.

[0284] The emission layer EML according to one or more embodiments may include at least one selected from the first to fourth compounds, the first compound being a polycyclic compound. For example, the emission layer EML may include the first compound, the second compound, and the third compound.

[0285] In one or more embodiments, the emission layer EML may include each of the first compound, the second compound, the third compound, and the fourth compound (e.g., all of the first compound, the second compound, the third compound, and the fourth compound). For example, the emission layer EML may include a combination of two host materials and two dopant materials. In the light-emitting element ED according to one or more embodiments, the emission layer EML may simultaneously (e.g., synchronously) include the first compound and the third compound as two different hosts, the fourth compound emitting delayed fluorescence, and the second compound as an organic metal complex, thereby having excellent or appropriate luminous efficiency characteristics.

[0286] In the emission layer EML, an exciplex may be formed by a hole transport host and an electron transport host. In the emission layer EML, the first compound and the third compound may form an exciplex. In this case, the triplet energy level of the exciplex formed by the hole transport host and the electron transport host may correspond to the energy level of the lowest unoccupied molecular orbital (LUMO) of the electron transport host and the energy level of the highest occupied molecular orbital (HOMO) of the hole transport host.

[0287] In the emission layer EML, the first compound as the electron transport host material and the third compound as the hole transport host material may form an excited complex, and energy may be transferred from the excited complex to the second compound and the fourth compound, thereby causing light emission. In one or more embodiments, the second compound may be used as a sensitizer. In the light-emitting element ED according to one or more embodiments, the second compound included in the emission layer EML may be used as a sensitizer, and thus may be used to transfer energy from the host to the fourth compound as an emission dopant. For example, the second compound used as an auxiliary dopant may accelerate the transfer of energy to the fourth compound as an emission dopant, and thus may increase the emission rate of the fourth compound.

[0288] In the light emitting element ED according to one or more embodiments, if the emission layer EML includes the described first compound, the second compound, and the third compound (for example, when the emission layer EML includes the described first compound, the second compound, and the third compound), the amount of the first compound and the third compound as the main material may be about 65 wt % to about 95 wt % relative to the total weight of the first compound, the second compound, and the third compound.

[0289] In one or more embodiments, the emission layer EML may further include a fifth compound represented by Formula ET-1. For example, the fifth compound represented by Formula ET-1 may be further included as an electron transport host material of the emission layer EML.

[0290] Formula ET-1

[0291]

[0292] In formula ET-1, selected from X 1 To X 3 At least one of them may be N, and the rest may be CR 56 For example, select X 1 To X 3 Any one of them can be N, and the remaining two can each independently be CR 56 In this case, the fifth compound represented by Formula ET-1 may include a pyridine moiety. In one or more embodiments, X 1 To X 3 Two of them can be N, and the remaining one can be CR 56 In this case, the fifth compound represented by Formula ET-1 may include a pyrimidine moiety. In one or more embodiments, X 1 To X 3 Each of (for example, all X 1 To X 3 ) may be N. In this case, the fifth compound represented by Formula ET-1 may include a triazine moiety.

[0293] 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.

[0294] In Formula ET-1, b1 to b3 may each independently be an integer selected from 0 to 10.

[0295] In formula ET-1, Ar 2 To Ar 4and R and R are each 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 carbazolyl group.

[0296] In formula ET-1, L 2 To L 4 Each of L may be independently a directly connected, 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 one or more embodiments, when b1 to b3 are each independently an integer of 2 or more, a plurality of L 2 To multiple 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.

[0297] In one or more embodiments, the fifth compound may be selected from any one of the compounds in compound group 5. The light emitting element ED according to one or more embodiments may further include at least one compound selected from compound group 5.

[0298] Compound Group 5

[0299]

[0300]

[0301]

[0302]

[0303]

[0304]

[0305]

[0306] In the specific exemplary compounds shown in Compound Group 5, "D" refers to a deuterium atom, and "Ph" refers to an unsubstituted phenyl group.

[0307] The emission layer EML may have, for example, about to about or about to about The emission layer EML may have a single layer formed of a single material, a single layer formed of a plurality of different materials, or a multilayer structure having a plurality of layers formed of a plurality of different materials.

[0308] exist Figures 3 to 7 In the light emitting element ED explained in the above, the emission layer EML may include the polycyclic compound described according to one or more embodiments as a host. In one or more embodiments, Figures 3 to 7 In the light emitting element ED illustrated in , according to one or more embodiments, the electron transport region ETR may include the polycyclic compound according to one or more embodiments.

[0309] In one or more embodiments, in the light emitting element ED according to one or more embodiments, the emission layer EML may further include an anthracene derivative, a pyrene derivative, a fluoranthene derivative, a 1,2-triphenylene derivative, a dihydrobenzanthracene derivative, or a triphenylene derivative. For example, the emission layer EML may further include an anthracene derivative or a pyrene derivative.

[0310] exist Figures 3 to 7 In the light emitting element ED illustrated in FIG. 1 , according to one or more embodiments, the emission layer EML may further include a compound represented by Formula E-1. The compound represented by Formula E-1 may be used as a fluorescent host material.

[0311] Formula E-1

[0312]

[0313] In formula E-1, R 31 To R 40 Each of R and R may be independently 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 carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms, and / or may be bonded to an adjacent group to form a ring. In one or more embodiments, R 31 To R 40 It may bond with an adjacent group to form a saturated hydrocarbon ring, an unsaturated hydrocarbon ring, a saturated heterocyclic ring, or an unsaturated heterocyclic ring.

[0314] In Formula E-1, c and d may be an integer selected from 0 to 5, each independently.

[0315] The compound represented by Formula E-1 may be selected from any one of Compound E1 to Compound E19.

[0316]

[0317]

[0318]

[0319] In one or more embodiments, the emission layer EML may further 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.

[0320] Formula E-2a

[0321]

[0322] In Formula E-2a, a may be an integer selected from 0 to 10, and L a It may be a directly connected, 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 one or more embodiments, when a is an integer of 2 or more, a plurality of L a 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.

[0323] In one or more embodiments, in Formula E-2a, A 1 To A 5 Can be N or CR independently i . R a To R i Each 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 carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms, and / or may be bonded to an adjacent group to form a ring. a To R i It may bond with an adjacent group to form a hydrocarbon ring or a heterocyclic ring containing N, O and / or S as ring atoms.

[0324] In one or more embodiments, in formula E-2a, selected from A 1 To A 5 Two or three of them may be N, and the rest may be CR i .

[0325] Formula E-2b

[0326]

[0327] 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 directly linked, 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 may be an integer selected 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.

[0328] The compound represented by Formula E-2a or Formula E-2b can be selected from any one of the compounds in Compound Group E-2. However, the compounds present in Compound Group E-2 are shown as examples, and the compounds represented by Formula E-2a or Formula E-2b are not limited to the compounds present in Compound Group E-2.

[0329] Compound Group E-2

[0330]

[0331]

[0332]

[0333] The emission layer EML may further include a compound represented by Formula Ma. The compound represented by Formula Ma may serve as a phosphorescent dopant material.

[0334] Formula Ma

[0335]

[0336] In formula Ma, Y 1 To Y 4 and Z 1 To Z 4 Can be independently CR 1 or N, and R 1 To R 4Each independently may be a hydrogen atom, a deuterium atom, a substituted or unsubstituted amine group, a substituted or unsubstituted sulfenyl 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, and / or may be bonded to 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, and when m is 1, n is 2.

[0337] The compound represented by the formula Ma may be used as a phosphorescent dopant.

[0338] The compound represented by formula Ma can be selected from any one of compound M-a1 to compound M-a25. However, compound M-a1 to compound M-a25 are shown as examples, and the compound represented by formula Ma is not limited to the compounds present in compound M-a1 to compound M-a25.

[0339]

[0340]

[0341] The emission layer EML may further contain a compound represented by any one selected from Formula Fa to Formula Fc. The compound represented by any one selected from Formula Fa to Formula Fc may be used as a fluorescent dopant material.

[0342] Formula

[0343]

[0344] 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 Not *-NAr 1 Ar 2 The remaining substituted groups may each independently be 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-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring-forming carbon atoms.

[0345] In *-NAr 1 Ar 2 in Ar 1 and Ar2 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 2 At least one of the may be a heteroaryl group containing O or S as a ring-forming atom.

[0346] Formula Fb

[0347]

[0348] In formula Fb, R a and R b 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 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, and / or may be bonded to 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.

[0349] 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 the may be a heteroaryl group containing O or S as a ring-forming atom.

[0350] In Formula Fb, the number of rings represented by U and V may be 0 or 1 independently. For example, in Formula Fb, if the number of U or V is 1 (for example, when the number of U or V is 1), one ring constitutes a condensed ring in the portion indicated by U or V, and if the number of U or V is 0 (for example, when the number of U or V is 0), it means that there is no ring indicated by U or V. For example, if the number of U is 0 and the number of V is 1 (for example, when the number of U is 0 and the number of V is 1), or if the number of U is 1 and the number of V is 0 (for example, when the number of U is 1 and the number of V is 0), the condensed ring having a fluorene core in Formula Fb may be a cyclic compound having four rings. In one or more embodiments, if the number of U and V is each 0 (for example, when the number of U and V is each 0), the condensed ring having a fluorene core in Formula Fb may be a cyclic compound having three rings. In one or more embodiments, if the number of U and V is each 1 (for example, when the number of U and V is each 1), the condensed ring having a fluorene core in Formula Fb may be a cyclic compound having five rings.

[0351] Formula Fc

[0352]

[0353] In Formula Fc, A 1 and A 2 can be independently O, S, Se or NR m , and R m R 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 They may each independently be a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron 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, and / or may bond with an adjacent group to form a ring.

[0354] In Formula Fc, A 1 and A 2 Each of them may independently bond to the substituent of the adjacent group to form a condensed ring. 1 and A 2 Can be independently NR m When A 1 Can be used with R 4 or R 5In one or more embodiments, A 2 Can be used with R 7 or R 8 bonded to form a ring.

[0355] In one or more embodiments, the emission layer EML may further include a styryl derivative (e.g., 1,4-bis[2-(3-N-ethylcarbazolyl)vinyl]benzene (BCzVB), 4-(di-p-tolylamino)-4'-[(di-p-tolylamino)styryl]stilbene (DPAVB), N-(4-((E)-2-(6-((E)-4-(diphenylamino)styryl)naphthalene-2-yl)vinyl)benzene As suitable dopant materials, perylene and its derivatives (e.g., 2,5,8,11-tetra-tert-butylperylene (TBP)) and / or pyrene and its derivatives (e.g., 1,1'-dipyrene, 1,4-dipyrenylbenzene, 1,4-bis(N,N-diphenylamino)pyrene) can be used.

[0356] The emission layer EML may further include a suitable phosphorescent dopant material. For example, a metal complex containing iridium (Ir), platinum (Pt), osmium (Os), gold (Au), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb) and / or thulium (Tm) may be used as a phosphorescent dopant. For example, bis(4,6-difluorophenylpyridyl-N,C2') pyridinecarboxylate iridium (III) (FIrpic), bis(2,4-difluorophenylpyridyl)-tetra(1-pyrazolyl) borate iridium (III) (FIr6) or octaethylporphyrin platinum (PtOEP) may be used as a phosphorescent dopant. However, embodiments of the present disclosure are not limited thereto.

[0357] The emission layer EML may include a quantum dot material. The core of the quantum dot may be selected from a II-VI group compound, an I-II-VI group compound, an II-IV-VI group compound, an I-II-IV-VI group compound, an II-IV-V group compound, a III-VI group compound, an I-III-VI group compound, a III-V group compound, a III-II-V group compound, an IV-VI group compound, a group IV element, a group IV compound, and / or a combination thereof (e.g., any suitable combination).

[0358] The II-VI Group 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 binary compound selected from the group consisting of CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdH Ternary compounds selected from the group consisting of CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof (e.g., any suitable mixture) (combination), and quaternary compounds selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and mixtures thereof (e.g., any suitable mixture).

[0359] Group III-VI compounds may include binary compounds (such as In 2 S 3 or In 2 Se 3 ), ternary compounds (such as InGaS 3 or InGaSe 3 ) or combinations thereof (e.g., any suitable combination).

[0360] The I-III-VI group compound can be selected from: AgInS, AgInS 2 、CuInS、CuInS 2 、AgGaS 2 、CuGaS 2 、CuGaO 2 、AgGaO 2 、AgAlO 2 and mixtures thereof (eg, any suitable mixtures), or ternary compounds (eg, AgInGaS 2 、CuInGaS 2 and mixtures thereof (eg, any suitable mixtures).

[0361] The Group 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 mixtures thereof (e.g., any suitable mixture), a ternary compound selected from the group consisting of GaNPs, GaNAs, GaNSb, GaPAs, GaPSb, AlNPs, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, InPSb and mixtures thereof (e.g., any suitable mixture), and a quaternary compound selected from the group consisting of GaAlNPs, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof (e.g., any suitable mixture). In one or more embodiments, the Group III-V compound may further include a Group II metal. For example, InZnP or the like may be selected as the Group III-II-V compound.

[0362] The IV-VI group 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 (e.g., any suitable mixture), a ternary compound selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof (e.g., any suitable mixture), and a quaternary compound selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof (e.g., any suitable mixture). 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 (e.g., any suitable mixture).

[0363] The I-II-VI group compound may be selected from CuZnS, and the II-IV-VI group compound may be selected from ZnSnS, etc. The I-II-IV-VI group compound may be selected from: selected from Cu 2 ZnSnS 2 , Cu 2 ZnSnS 4 , Cu 2 ZnSnSe 4 、Ag 2ZnSnS 2 and quaternary compounds in a group composed of its mixture.

[0364] Examples of the II-IV-V group compounds may be selected from the group consisting of ZnSnP, ZnSnP 2 , ZnSnAs 2 , ZnGeP 2 , ZnGeAs 2 , CdSnP 2 , CdGeP 2 and ternary compounds in a group composed of its mixture.

[0365] Each element included in a multicomponent compound such as a binary compound, a ternary compound or a quaternary compound may exist in the particles in a concentration distribution that is substantially uniform or not substantially uniform. For example, the general formula refers to the type (species) of elements included in the compound, and the element ratios in the compound may be different. For example, AgInGaS 2 may refer to AgIn x Ga 1-x S 2 (where x is a real number satisfying 0 < x < 1).

[0366] In one or more embodiments, the quantum dots may have a single structure or a core-shell dual structure in which the concentration of each element included in the quantum dots is substantially uniform. For example, the material included in the core may be different from the material included in the shell.

[0367] The shell of the quantum dots can be used as a protective layer to prevent or reduce the chemical denaturation of the core to maintain semiconductor properties, and / or as a charging layer to impart electrophoretic properties to the quantum dots. The shell can be a single layer or multiple layers. The interface between the core and the shell may have a concentration gradient in which the concentration of the elements present in the shell decreases towards the center of the core.

[0368] Examples of the shell of the quantum dots may include metal oxides or non-metal oxides, semiconductor compounds, and / or combinations thereof (e.g., any suitable combination). For example, the metal oxide or non-metal oxide may be a binary compound such as 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 4and / or NiO, or ternary compounds such as MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 and / or CoMn 2 O 4 , but the embodiments of the present disclosure are not limited thereto.

[0369] Furthermore, examples of semiconductor compounds may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP and / or AlSb, etc., but embodiments of the present disclosure are not limited thereto.

[0370] Each element included in a polynary compound such as a binary compound or a ternary compound may be present in the particle in a substantially uniform or non-substantially uniform concentration distribution. For example, the general formula above may refer to the type (species) of the element included in the compound, and the ratio of the elements in the compound may be different.

[0371] The quantum dots may 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, and may improve color purity or color reproducibility within the described range. In one or more embodiments, light emitted by such quantum dots is emitted in every direction (e.g., in any or all directions), and thus may improve wide viewing angles.

[0372] In one or more embodiments, although the form of quantum dots is not specifically limited as long as it is a form commonly used in the art, more specifically, quantum dots in the form of spherical, pyramidal, multi-armed or cubic nanoparticles, nanotubes, nanowires, nanofibers and / or nanoplates can be used.

[0373] As the size of the quantum dots is adjusted or the ratio of elements in the quantum dot compound is adjusted, the energy band gap may be controlled, and thus light in one or more appropriate wavelength ranges may be obtained in the quantum dot emission layer. Therefore, the quantum dots described herein are utilized (utilizing quantum dots of different sizes or different ratios of elements in the quantum dot compound), and thus a light emitting element ED emitting light in one or more appropriate wavelength ranges may be implemented. For example, the size of the quantum dots or the ratio of elements in the quantum dot compound may be selected to emit red, green, and / or blue light. In one or more embodiments, the quantum dots may be configured to emit white light by combining one or more appropriate colors of light.

[0374] exist Figures 3 to 7 In each of the light emitting elements ED of the embodiments illustrated 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, but the embodiments of the present disclosure are not limited thereto.

[0375] The electron transport region ETR may have a single layer formed of a single material, a single layer formed of a plurality of different materials, or a multi-layered structure including a plurality of layers formed of a plurality of different materials.

[0376] 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 may have a single-layer structure formed of an electron injection material and an electron transport material. In one or more embodiments, the electron transport region ETR may have a single-layer structure formed of a plurality of different materials, or may have a structure in which an electron transport layer ETL / electron injection layer EIL, a hole blocking layer HBL / electron transport layer ETL / electron injection layer EIL are stacked in order from the emission layer EML, but the embodiments of the present disclosure are not limited thereto. The electron transport region ETR may have, for example, about to about Thickness.

[0377] The electron transport region ETR may be formed using one or more appropriate methods such as vacuum deposition, spin coating, casting, Langmuir-Brokett (LB) method, inkjet printing, laser printing, and laser induced thermal imaging (LITI) method.

[0378] The electron transport region ETR may include a compound represented by Formula ET-2.

[0379] Formula ET-2

[0380]

[0381] In formula ET-2, selected from X 1 To X 3 At least one of them is N, and the rest (e.g., selected from X 1 To X 3 Any remaining ) can be CR a . R a Ar 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 3Each 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.

[0382] In Formula ET-2, a to c may each independently be an integer selected from 0 to 10. In Formula ET-2, L 1 To L 3 Each L may be independently a directly connected, 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 one or more embodiments, if a to c may each be independently an integer of 2 or more (for example, when a to c may each be independently an integer of 2 or more), a plurality of L 1 To multiple 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.

[0383] The electron transport region ETR may include an anthracene compound. However, the embodiments of the present disclosure are not limited thereto, and the electron transport region ETR may include, for example, tris(8-hydroxyquinoline)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 (Bphen), 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ), 4-(naphthalene-1-yl)-3,5-diphenyl-4H-1,2,4-triazole (NTAZ), 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole ( t Bu-PBD), bis(2-methyl-8-hydroxyquinoline-N1,O8)-(1,1'-biphenyl-4-hydroxy)aluminum (BAlq), bis(benzoquinoline-10-hydroxy)beryllium (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.

[0384] The electron transport region ETR may include at least one selected from the group consisting of compounds ET1 to ET36.

[0385]

[0386]

[0387]

[0388]

[0389] In one or more 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), and a co-deposited material of the metal halide and the lanthanide metal. For example, the electron transport region ETR may include KI:Yb, RbI:Yb, and / or LiF:Yb as a co-deposited material. In one or more embodiments, a metal oxide (e.g., Li 2 O or BaO) and / or 8-hydroxyquinoline lithium (Liq) etc. form an electron transport region ETR, but the embodiments of the present disclosure are not limited thereto. The electron transport region ETR can also be formed by a mixture material of an electron transport material and an insulating organic metal salt. The insulating organic metal salt may be a material having an energy band gap of about 4 eV or greater. For example, the insulating organic metal salt may include, for example, a metal acetate, a metal benzoate, a metal acetoacetate, a metal acetylacetonate or a metal stearate.

[0390] In addition to the materials described herein, the electron transport region ETR may further 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) (for example, at least one selected from 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)), but embodiments of the present disclosure are not limited thereto.

[0391] The electron transport region ETR may include the described compound of the electron transport region ETR in at least one of the electron injection layer EIL, the electron transport layer ETL, and the hole blocking layer HBL.

[0392] When the electron transport region ETR includes the electron transport layer ETL, the electron transport layer ETL may have a thickness of about to about For example, about to about When the thickness of the electron transport layer ETL satisfies the aforementioned range, satisfactory electron transport characteristics can be obtained without significantly increasing the driving voltage. When the electron transport region ETR includes the electron injection layer EIL, the electron injection layer EIL may have a thickness of about to about For example, about to about When the thickness of the electron injection layer EIL satisfies the range described herein, satisfactory electron injection characteristics can be obtained without significantly increasing the driving voltage.

[0393] 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, if the first electrode EL1 is an anode (for example, when the first electrode EL1 is an anode), the second electrode EL2 may be a cathode, and if the first electrode EL1 is a cathode (for example, when the first electrode EL1 is a cathode), the second electrode EL2 may be an anode.

[0394] The second electrode EL2 may be a transmissive electrode, a transflective electrode or a reflective electrode. When the second electrode EL2 is a transmissive electrode, the second electrode EL2 may be formed of a transparent metal oxide, such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO) and / or indium tin zinc oxide (ITZO).

[0395] When the second electrode EL2 is a transflective electrode or a reflective electrode, the second electrode EL2 may include Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF, Mo, Ti, Yb, W or a compound or mixture thereof (e.g., AgMg, AgYb or MgYb), or a material having a multilayer structure, such as LiF / Ca (a stacked structure of LiF and Ca) or LiF / Al (a stacked structure of LiF and Al). In one or more embodiments, the second electrode EL2 may have a multilayer structure including a reflective film or a transflective film formed of the materials described herein and a transparent conductive film formed of ITO, IZO, ZnO and / or 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, and / or an oxide of the metal material described herein, etc.

[0396] In one or more embodiments, the second electrode EL2 may be connected to the auxiliary electrode. When the second electrode EL2 is connected to the auxiliary electrode, the resistance of the second electrode EL2 may be reduced.

[0397] In one or more embodiments, a capping layer CPL may be further disposed on the second electrode EL2 of the light emitting element ED of one or more embodiments. The capping layer CPL may include a plurality of layers or a single layer.

[0398] In one or more embodiments, the capping layer CPL may be an organic layer or an inorganic layer. For example, if the capping layer CPL contains an inorganic material (for example, when the capping layer CPL contains an inorganic material), the inorganic material may include an alkali metal compound (for example, LiF), an alkaline earth metal compound (for example, MgF 2 )、SiON、SiN x and / or SiO y wait.

[0399] For example, if (eg, when) the capping layer CPL includes an organic material, the organic material may include N,N'-bis(1-naphthyl)-N,N'-bis(phenyl)-2,2'-dimethylbenzidine (α-NPD), NPB, TPD, m-MTDATA, Alq 3 , CuPc, N4,N4,N4',N4'-tetrakis(biphenyl-4-yl)biphenyl-4,4'-diamine (TPD15) and / or 4,4',4"-tris(N-carbazolyl)triphenylamine (TCTA), etc., or epoxy resin or acrylate (e.g., methacrylate). However, the embodiments of the present disclosure are not limited thereto, and the capping layer CPL may include at least one selected from compounds P1 to P5.

[0400]

[0401] In one or more embodiments, the capping layer CPL may have a refractive index of about 1.6 or more. For example, with respect to light in a wavelength range of about 550 nanometers (nm) to about 660 nm, the capping layer CPL may have a refractive index of about 1.6 or more.

[0402] Figures 8 to 11 Each of them is a cross-sectional view of a display device according to one or more embodiments of the present disclosure. Figures 8 to 11 When the display device of the embodiment of the present invention is described, the description of the display device already described in Figures 1 to 7 Instead of repeating the features described in , we will mainly describe their differences in more detail.

[0403] refer to Figure 8 According to one or more embodiments, a display device DD-a may include a display panel DP including a display device layer DP-ED, a light control layer CCL and a color filter layer CFL arranged on the display panel DP. Figure 8In one or more embodiments explained in the accompanying drawings, the display panel DP may include a base layer BS, a circuit layer DP-CL provided on the base layer BS, and a display device layer DP-ED, and the display device layer DP-ED may include a light emitting element ED.

[0404] The light emitting element ED may include a first electrode EL1, a hole transport region HTR disposed on the first electrode EL1, an emission layer EML disposed on the hole transport region HTR, an electron transport region ETR disposed on the emission layer EML, and a second electrode EL2 disposed on the electron transport region ETR. In one or more embodiments, as described herein Figures 3 to 7 The structure of the light emitting element can also be applied to Figure 8 The structure of the light-emitting element ED explained in FIG. Figure 8 The light-emitting element ED explained in the embodiment may include the polycyclic compound according to one or more embodiments. The light-emitting element ED according to one or more embodiments includes the polycyclic compound according to one or more embodiments in the emission layer EML, thereby exhibiting excellent or appropriate color reproducibility and long life characteristics, and thus the display device DD-a according to one or more embodiments can exhibit excellent or appropriate display quality.

[0405] refer to Figure 8 , the emission layer EML may be arranged in the opening OH defined in the pixel defining layer PDL. For example, the emission layer EML divided by the pixel defining layer PDL and provided corresponding to each light emitting area PXA-R, PXA-G and PXA-B may emit light in substantially the same wavelength range. In the display device DD-a of one or more embodiments, the emission layer EML may emit blue light. In one or more embodiments, unlike the configuration illustrated in the drawings, the emission layer EML may be provided as a common layer in the entire light emitting areas PXA-R, PXA-G and PXA-B.

[0406] The light control layer CCL may be arranged on the display panel DP. The light control layer CCL may include a light converter. The light converter may be a quantum dot and / or a phosphor, etc. The light converter may emit converted light by converting the wavelength of the provided light. For example, the light control layer CCL may be a layer containing quantum dots or a layer containing phosphors.

[0407] 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 separated and / or spaced apart from each other.

[0408] refer to Figure 8 , the dividing pattern BMP may be disposed between the light control parts CCP1 , CCP2 , and CCP3 that are separated and / or spaced apart from each other, but embodiments of the present disclosure are not limited thereto. Figure 8It is explained that the dividing pattern BMP does not overlap with the light control parts CCP1 , CCP2 , and CCP3 , but at least a portion of the edges of the light control parts CCP1 , CCP2 , and CCP3 may overlap with the dividing pattern BMP.

[0409] 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 from the light emitting element 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.

[0410] In one or more embodiments, the first light control component CCP1 may provide red light as the second color light, and the second light control component CCP2 may provide green light as the third color light. The third light control component CCP3 may provide blue light by transmitting blue light as the first color light provided from the light emitting element ED. For example, the first quantum dot QD1 may be a red quantum dot, and the second quantum dot QD2 may be a green quantum dot. The same contents described above may be applied to quantum dots QD1 and QD2.

[0411] In one or more 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.

[0412] The scatterer SP may be an inorganic particle. For example, the scatterer SP may include TiO 2 、ZnO、Al 2 O 3 、SiO 2 and hollow spherical silica. The scatterer SP may include 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.

[0413] The first light control component CCP1, the second light control component CCP2, and the third light control component CCP3 may each include base 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 the first base resin BR1, the second light control component CCP2 may include second quantum dots QD2 and scatterers SP dispersed in the second base resin BR2, and the third light control component CCP3 may include scatterers SP dispersed in the third base resin BR3.

[0414] The base resins BR1, BR2 and BR3 are media in which the quantum dots QD1 and QD2 and the scatterers SP are dispersed, and may be formed of one or more suitable resin compositions which may be generally referred to as binders. For example, the base resins BR1, BR2 and BR3 may be acrylic resins, urethane resins, silicone resins and / or epoxy resins, etc. The base resins BR1, BR2 and BR3 may be transparent resins. In one or more embodiments, the first base resin BR1, the second base resin BR2 and the third base resin BR3 may be the same or different from each other.

[0415] The light control layer CCL may include an isolation layer BFL1. The isolation layer BFL1 may be used to prevent or reduce the penetration of moisture and / or oxygen (hereinafter, referred to as "moisture / oxygen"). The isolation layer BFL1 may block or reduce the exposure of the light control components CCP1, CCP2, and CCP3 to moisture / oxygen. In one or more embodiments, the isolation layer BFL1 may cover the light control components CCP1, CCP2, and CCP3. In one or more embodiments, the isolation layer BFL2 may be provided between the light control components CCP1, CCP2, and CCP3 and the filters CF1, CF2, and CF3.

[0416] The isolation layers BFL1 and BFL2 may include at least one inorganic layer. For example, the isolation layers BFL1 and BFL2 may include an inorganic material. For example, the isolation 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 and / or a metal film that ensures light transmittance, etc. In one or more embodiments, the isolation layers BFL1 and BFL2 may further include an organic film. The isolation layers BFL1 and BFL2 may be formed of a single layer or a plurality of layers.

[0417] In the display device DD-a of one or more embodiments, the color filter layer CFL may be disposed on the light control layer CCL. For example, the color filter layer CFL may be directly disposed on the light control layer CCL. In this case, the isolation layer BFL2 may not be provided.

[0418] 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 polymerized photosensitive resin and a pigment or dye. The first filter CF1 may include a red pigment or a red dye, the second filter CF2 may include a green pigment or a green dye, and the third filter CF3 may include a blue pigment or a blue dye.

[0419] In one or more 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 a dye. The third filter CF3 may include a polymerized photosensitive resin and may not include (e.g., may exclude) a pigment or a dye. The third filter CF3 may be transparent. The third filter CF3 may be formed of a transparent photosensitive resin.

[0420] In addition, in one or more 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 separated but provided as one filter.

[0421] 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 containing a black pigment or a black dye. The light shielding member may prevent or reduce light leakage and may separate adjacent filters CF1, CF2, and CF3. Also, in one or more embodiments, the light shielding member may be formed of a blue filter.

[0422] The first to third filters CF1, CF2, and CF3 may be arranged to correspond to the red light emitting area PXA-R, the green light emitting area PXA-G, and the blue light emitting area PXA-B, respectively.

[0423] The base substrate BL may be arranged on the color filter layer CFL. The base substrate BL may be a member that provides a base surface on which the color filter layer CFL and / or the light control layer CCL, etc. are arranged. The base substrate BL may be a glass substrate, a metal substrate, and / or 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 a composite material layer. In one or more embodiments, unlike the configuration illustrated in the drawings, in one or more embodiments, the base substrate BL may not be provided.

[0424] Fig. 9 A cross-sectional view for explaining a portion of a display device according to one or more embodiments. In a display device DD-TD according to one or more embodiments, a light-emitting element ED-BT may include a plurality of light-emitting structures OL-B1, OL-B2, and OL-B3. At least one of the plurality of light-emitting structures OL-B1, OL-B2, and OL-B3 may contain a polycyclic compound according to one or more embodiments. The light-emitting element ED-BT according to one or more embodiments may exhibit excellent or appropriate color reproducibility and long life characteristics. The display device DD-TD according to one or more embodiments includes a light-emitting element ED-BT containing a polycyclic compound according to one or more embodiments, and thus may exhibit excellent or appropriate display quality.

[0425] The light emitting element 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. Each of the light emitting structures OL-B1, OL-B2, and OL-B3 may include an emission layer EML ( Figure 8 ) and the hole transport region HTR ( Figure 8 ) and the electron transport region ETR ( Figure 8 ), the emission layer EML is arranged between the hole transport region HTR and the electron transport region ETR. For example, the light-emitting element ED-BT included in the display device DD-TD of one or more embodiments may be a light-emitting element having a tandem structure and including a plurality of emission layers EML.

[0426] exist Fig. 9 In one or more embodiments explained in, all light beams emitted from 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 from the light emitting structures OL-B1, OL-B2, and OL-B3, respectively, may have wavelength ranges different from each other. For example, the light emitting element 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 emit white light.

[0427] The charge generation layers CGL1 and CGL2 may be disposed between adjacent light emitting structures OL-B1, OL-B2, and OL-B3. The charge generation layers CGL1 and CGL2 may include p-type or p-like charge generation layers (e.g., p-charge generation layers) and / or n-type or n-like charge generation layers (e.g., n-charge generation layers).

[0428] refer to Fig.10, the display device DD-b according to one or more embodiments may include light-emitting elements ED-1, ED-2, and ED-3 in which two emission layers are stacked. At least one of the light-emitting elements ED-1, ED-2, and ED-3 may include a polycyclic compound according to one or more embodiments. Therefore, the first compound as a polycyclic compound according to one or more embodiments and at least one of the second to fifth compounds may be included. Therefore, the light-emitting elements ED-1, ED-2, and ED-3 may exhibit excellent or appropriate color reproducibility and long life characteristics.

[0429] and Figure 2 Compared to the display device DD of one or more embodiments described in Fig.10 The difference from one or more embodiments explained in is that the first to third light-emitting elements ED-1, ED-2, and ED-3 each include two emission layers stacked in the thickness direction. In each of the first to third light-emitting elements ED-1, ED-2, and ED-3, the two emission layers may emit light in substantially the same wavelength region.

[0430] The first light-emitting element ED-1 may include a first red emission layer EML-R1 and a second red emission layer EML-R2. The second light-emitting element ED-2 may include a first green emission layer EML-G1 and a second green emission layer EML-G2. In one or more embodiments, the third light-emitting element 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 arranged 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.

[0431] 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 (not shown), a charge generation layer (not shown), and a hole transport region (not shown) stacked in sequence. The emission auxiliary component OG may be provided as a common layer in the entire first to third light-emitting elements 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 the pixel defining layer PDL.

[0432] The first red emission layer EML-R1, the first green emission layer EML-G1, and the first blue emission layer EML-B1 may be disposed between the electron transport region ETR 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 disposed between the emission auxiliary component OG and the hole transport region HTR.

[0433] For example, the first light-emitting element 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 element 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 element 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.

[0434] In one or more embodiments, an optical auxiliary layer PL may be disposed on the display device layer DP-ED. The optical auxiliary layer PL may include a polarizing layer. The optical auxiliary layer PL may be disposed on the display panel DP and control light reflected in the display panel DP due to external light. Unlike the configuration illustrated in the drawings, the optical auxiliary layer PL may not be provided in the display device according to one or more embodiments.

[0435] and Fig. 9 and Fig.10 different, Fig.11 The display device DD-c illustrates that it includes four light emitting structures OL-B1, OL-B2, OL-B3, and OL-C1. The light emitting element 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. At least one of the first to fourth light emitting structures OL-B1, OL-B2, OL-B3, and OL-C1 may contain a polycyclic compound according to one or more embodiments. Therefore, the light emitting element ED-CT may exhibit excellent or appropriate color reproducibility and long life characteristics.

[0436] The charge generation layers CGL1, CGL2, and CGL3 may be arranged between the light emitting structures OL-C1, OL-B1, OL-B2, and OL-B3. Among the four light emitting structures, the first to third light emitting structures OL-B1, OL-B2, and OL-B3 may emit blue light, and the fourth light emitting structure OL-C1 may 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 emit light beams in different wavelength regions. The charge generation layers CGL1, CGL2, and CGL3 arranged between adjacent light emitting structures OL-C1, OL-B1, OL-B2, and OL-B3 may include a p-type or p-like charge generation layer (e.g., a p-charge generation layer) and / or an n-type or n-like charge generation layer (e.g., an n-charge generation layer).

[0437] In one or more embodiments, 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 embodiments may be a device activated according to an electrical signal. The electronic device may include a display device of one or more appropriate embodiments. For example, the electronic device may include not only large electronic devices (e.g., televisions, monitors, or outdoor billboards), but also small and medium-sized electronic devices (e.g., personal computers, laptop computers, personal digital terminals, display devices for vehicles, game consoles, portable electronic devices, or cameras).

[0438] Fig.12 For explaining a view of a vehicle AM ​​in which first to fourth display devices DD-1, DD-2, DD-3, and DD-4 are arranged. At least one of the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 may include a reference Figure 1 , Figure 2 and Figures 8 to 11 The same configuration of the display devices DD, DD-TD, DD-a, DD-b, and DD-c according to one or more embodiments is described.

[0439] Fig.12The vehicle AM ​​is explained, but this is only an example, and the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 may be arranged in another means of transportation (e.g., a bicycle, a motorcycle, a train, a ship, and an airplane). In one or more embodiments, at least one of the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 including the same configuration as the display devices DD, DD-TD, DD-a, DD-b, and DD-c of one or more embodiments may be used in a personal computer, a laptop computer, a personal digital terminal, a game console, a portable electronic device, a television, a monitor, and / or an outdoor billboard, etc. In one or more embodiments, these are provided only as embodiments, and therefore may also be used in other electronic devices unless departing from the present disclosure.

[0440] At least one selected from the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 may include a reference Figures 3 to 7 At least one selected from the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 may contain the polycyclic compound according to one or more embodiments and at least one of the second to fifth compounds. Therefore, the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 containing the polycyclic compound according to one or more embodiments may have improved color reproducibility, display quality, and display life.

[0441] refer to Fig.12 The vehicle AM ​​may include a steering wheel HA and a gearshift GR for driving the vehicle AM. In one or more embodiments, the vehicle AM ​​may include a front window GL arranged to face the driver.

[0442] The first display device DD-1 may be arranged in a first area overlapping with the steering wheel HA. For example, the first display device DD-1 may be a digital instrument panel displaying first information of the vehicle AM. The first information may include a first scale indicating the driving speed of the vehicle AM, a second scale indicating the engine speed (i.e., revolutions per minute (RPM)), and / or an image indicating the fuel status, etc. The first scale and the second scale may be indicated as digital images.

[0443] The second display device DD-2 may be arranged in a second area facing the driver's seat and overlapping with the front window GL. The driver's seat may be a seat in which the steering wheel HA is arranged. For example, the second display device DD-2 may be a head-up display (HUD) that displays the second information of the vehicle AM. The second display device DD-2 may be optically transparent. The second information may include a numerical value indicating the driving speed, and may further include information such as the current time. Different from the configuration illustrated in the accompanying drawings, the second information of the second display device DD-2 may be projected onto the front window GL and displayed.

[0444] The third display device DD-3 may be arranged in a third zone adjacent to the gear GR. For example, the third display device DD-3 may be arranged between the driver's seat and the passenger seat and may be a central information display (CID) of the vehicle for displaying the third information. The passenger seat may be a seat separated and / or spaced apart from the driver's seat, and the gear GR is arranged between the passenger seat and the driver's seat. The third information may include information about traffic information (e.g., navigation information), information about playing music or radio or video (or images), and / or information about the temperature inside the vehicle AM, etc.

[0445] The fourth display device DD-4 may be separated and / or spaced apart from the steering wheel HA and the gearshift GR, and may be arranged in a fourth zone adjacent to one side of the vehicle AM. For example, the fourth display device DD-4 may be a digital side mirror that displays the fourth information. The fourth display device DD-4 may display an image of the outside of the vehicle AM ​​captured by a camera module CM arranged outside the vehicle AM. The fourth information may include an image of the outside of the vehicle AM.

[0446] The first to fourth information described herein may be examples, and the first to fourth display devices DD-1, DD-2, DD-3, and DD-4 may further display information about the inside and outside of the vehicle AM. The first to fourth information may include different information. However, the embodiments of the present disclosure are not limited thereto, and a portion of the first to fourth information may include the same information as each other.

[0447] Terms such as "substantially," "about," and "approximately" are used as relative terms and not as terms of degree, and are intended to take into account the inherent deviations in measurements or calculations that one of ordinary skill in the art will recognize. They may include deviations from the stated value and an acceptable range determined by one of ordinary skill in the art taking into account the limitations and errors associated with the measurement of that amount. For example, "about" may refer to one or more standard deviations of the stated value, or ±30%, ±20%, ±10%, or ±5% of the stated value.

[0448] 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 with a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Therefore, applicants reserve the right to amend this specification (including the claims) to expressly set forth any subranges contained within the ranges expressly set forth herein.

[0449] 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 may be implemented using any appropriate hardware, firmware (e.g., a dedicated integrated circuit), software, or a combination of software, firmware and hardware. For example, the various components of the light-emitting device and / or the light-emitting element may be formed on an integrated circuit (IC) chip or on separate IC chips. Further, the various components of the light-emitting device and / or the light-emitting element may be implemented on a flexible printed circuit film, a tape carrier package (TCP) or a printed circuit board (PCB), or formed on a substrate. Further, the various components and / or elements of the device 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 various functions described herein. Computer program instructions are stored in a memory that may be implemented in a computing device using a standard storage device such as, for example, a random access memory (RAM). Computer program instructions may also be stored in other non-temporary computer-readable media such as, for example, a CD-ROM or a flash drive, etc. Furthermore, those skilled in the art should recognize that the functionality of various computing devices may be combined or integrated into a single computing device, or 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.

[0450] In the present disclosure, when the particles are spherical, "diameter" indicates the average particle diameter, and when the particles are non-spherical, "diameter" indicates 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 photography. 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" 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 of the particle size corresponding to 50% from the smallest particle when the total number of particles is 100% in a distribution curve accumulated in the order from the smallest particle size to the largest particle size. Particle size analysis can be performed using a HORIBA LA-950 laser particle size analyzer.

[0451] Hereinafter, with reference to Examples and Comparative Examples, the polycyclic compound according to one or more embodiments of the present disclosure and the light-emitting element according to one or more embodiments will be described in more detail. In one or more embodiments, the examples described are shown only for understanding the present disclosure, and the scope of the present disclosure is not limited thereto.

[0452] Example

[0453] (1) Synthesis of polycyclic compounds according to one or more embodiments

[0454] The synthesis method of the polycyclic compound according to one or more embodiments will be described in more detail by exemplifying the synthesis methods of Compound 1, Compound 2, Compound 5, Compound 21, Compound 43, Compound 56, and Compound 103 as polycyclic compounds according to one or more embodiments. In one or more embodiments, the synthesis method of the polycyclic compound to be described below is provided as an example, and thus the synthesis method of the polycyclic compound according to one or more embodiments of the present disclosure is not limited to the example.

[0455] (1) Synthesis of Compound 1

[0456] The polycyclic compound 1 according to one or more embodiments may be synthesized through the steps (eg, actions or tasks) shown in, for example, Reaction Scheme 1-1 to Reaction Scheme 1-3.

[0457] Reaction Scheme 1-1

[0458]

[0459] Reaction Scheme 1-2

[0460]

[0461] Reaction Scheme 1-3

[0462]

[0463] 1) Synthesis of intermediate 1-1

[0464] K 3 PO 4 and DMF solvent were placed in 1-bromo-9H-carbazole (CAS#: 16807-11-7) and 1-bromo-2-fluorobenzene (CAS#: 1072-85-1), and the mixture was stirred at about 100° C. overnight to obtain Intermediate 1-1. The LC-MS identification value of the obtained Intermediate 1-1 is as follows.

[0465] C 18 H 11 Br 2 N M+1:401.93

[0466] 2) Synthesis of Intermediates 1-2 and 1-3

[0467] 1,3-Dibromobenzene (CAS#: 108-36-1) was reacted with n-BuLi, and then trichloro(phenyl)silane (CAS#: 98-13-5) was added, and the mixture was stirred for about 2 hours to obtain intermediate 1-2. Intermediate 1-1 was reacted with n-BuLi, and then the previously obtained intermediate 1-2 was added, and the mixture was stirred at room temperature overnight to obtain intermediate 1-3. The LC-MS identification values ​​of the obtained intermediate 1-3 are as follows.

[0468] C 30 H 20 BrNSi M+1: 504.11

[0469] 3) Synthesis of intermediates 1-4

[0470] Intermediate 1-3 was reacted with n-BuLi, then trimethyl borate (CAS#: 121-43-7) was added, and the mixture was stirred at room temperature overnight, and then H 2 O to obtain intermediate 1-4. The LC-MS identification value of the obtained intermediate 1-4 is as follows.

[0471] C 30 H 22 BNO 2 Si M+1:468.16

[0472] 4) Synthesis of Intermediate 1-5

[0473] 9H-carbazole (CAS#: 86-74-8) was reacted with n-BuLi, and then cyanuric chloride (CAS#: 108-77-0) was added, and the mixture was stirred at about 70° C. overnight to obtain Intermediate 1-5. The LC-MS identification value of the obtained Intermediate 1-5 was as follows.

[0474] C 27 H 16 C1N 5 M+1: 446.14

[0475] 5) Synthesis of Compound 1

[0476] 2.5 g of intermediate 1-5, 2.88 g of intermediate 1-4, 0.26 g of Pd(PPh 3 ) 4 , 1.94 g of K 2 CO 3 (In 7 mL of H 2O), 7mL of EtOH, 28mL of toluene were put into a round bottom flask (RBF), and the mixture was stirred at about 120°C overnight. After the reaction was completed, the reaction solution was extracted with ethyl acetate, the collected organic layer was dried with magnesium sulfate, and the solvent was evaporated. Thereafter, the obtained residue was separated and purified by silica gel column chromatography to obtain 2.94g of compound 1 (yield: 63%). The LC-MS identification value of the obtained compound 1 is as follows.

[0477] C 57 H 36 N 6 Si M+1: 833.28

[0478] (2) Synthesis of Compound 2

[0479] The polycyclic compound 2 according to one or more embodiments may be synthesized through the steps shown in Reaction Scheme 2, for example.

[0480] Reaction Scheme 2

[0481]

[0482] 1) Synthesis of intermediate 2-1

[0483] 9H-carbazole (CAS#: 86-74-8) was reacted with n-BuLi, and then cyanuric chloride (CAS#: 108-77-0) was added, and the mixture was stirred at about 70°C for about 2 hours, and then stirred at room temperature overnight to obtain Intermediate 2-1. The LC-MS identification value of the obtained Intermediate 2-1 is as follows.

[0484] C 15 H 8 Cl 2 N 4 M+1: 315.01

[0485] 2) Synthesis of intermediate 2-2

[0486] The intermediate 2-1 and phenylboronic acid (CAS#: 98-80-6) were stirred overnight under Pd catalysis to obtain the intermediate 2-2. The LC-MS identification value of the obtained intermediate 2-2 is as follows.

[0487] C 21 H 13 C1N 4 M+1: 357.10

[0488] 3) Synthesis of Compound 2

[0489] 2.0 g of intermediate 2-2, 2.88 g of intermediate 1-4, 0.26 g of Pd(PPh 3) 4 , 1.94 g of K 2 CO 3 (In 7 mL of H 2 O), 7mL of EtOH, 28mL of toluene were put into RBF, and the mixture was stirred at about 120°C overnight. After the reaction was completed, the reaction solution was extracted with ethyl acetate, the collected organic layer was dried with magnesium sulfate, and the solvent was evaporated. Thereafter, the obtained residue was separated and purified by silica gel column chromatography to obtain 2.54g of compound 2 (yield: 61%). The LC-MS identification value of the obtained compound 2 is as follows.

[0490] C 51 H 33 N 5 Si M+1:745.26

[0491] (3) Synthesis of Compound 5

[0492] The polycyclic compound 5 according to one or more embodiments may be synthesized through the steps shown in Reaction Scheme 3, for example.

[0493] Reaction Scheme 3

[0494]

[0495] 1) Synthesis of intermediate 5-1

[0496] Cyanuric chloride (CAS#: 108-77-0) and phenylboronic acid (CAS#: 98-80-6) were stirred overnight under Pd catalysis to obtain intermediate 5-1. The LC-MS identification value of the obtained intermediate 5-1 is as follows.

[0497] C 9 H 5 Cl 2 N 3 M+1: 225.99

[0498] 2) Synthesis of Compound 5

[0499] 1.0 g of intermediate 5-1, 34 g of intermediate 1-4, 0.41 g of Pd(PPh 3 ) 4 , 3.06g of K 2 CO 3 (In 11 mL of H 2O), 11mL of EtOH, 44mL of toluene were put into RBF, and the mixture was stirred at about 120°C overnight. After the reaction was completed, the reaction solution was extracted with ethyl acetate, the collected organic layer was dried with magnesium sulfate, and the solvent was evaporated. Thereafter, the obtained residue was separated and purified by silica gel column chromatography to obtain 2.26g of compound 5 (yield: 51%). The LC-MS identification value of the obtained compound 5 is as follows.

[0500] C 69 H 45 N 5 Si 2 M+1: 1001.33

[0501] (4) Synthesis of Compound 21

[0502] The polycyclic compound 21 according to one or more embodiments may be synthesized through the steps shown in Reaction Scheme 4, for example.

[0503] Reaction Scheme 4

[0504]

[0505] 1.5 g of intermediate 4-1, 4.13 g of intermediate 1-4, 0.39 g of Pd(PPPh 3 ) 4 , 2.91g of K 2 CO 3 (In 10 mL of H 2 O), 10mL of EtOH, 40mL of toluene were placed in RBF, and the mixture was stirred at about 120°C overnight. After the reaction was completed, the reaction solution was extracted with ethyl acetate, the collected organic layer was dried with magnesium sulfate, and the solvent was evaporated. Thereafter, the obtained residue was separated and purified by silica gel column chromatography to obtain 2.02g of compound 21 (yield: 48%). The LC-MS identification values ​​of the obtained compound 21 are as follows.

[0506] C 69 H 47 N 5 Si 2 M+1: 1003.34

[0507] (5) Synthesis of Compound 43

[0508] The polycyclic compound 43 according to one or more embodiments may be synthesized through the steps shown in Reaction Scheme 5, for example.

[0509] Reaction Scheme 5

[0510]

[0511] 1) Synthesis of Intermediate 43-1

[0512] Cyanuric chloride (CAS#: 108-77-0) and phenylboronic acid (CAS#: 98-80-6) were stirred overnight under Pd catalysis to obtain Intermediate 43-1. The LC-MS identification value of the obtained Intermediate 43-1 is as follows.

[0513] C 15 H 10 C1N 3 M+1: 269.05

[0514] 2) Synthesis of compound 43

[0515] 2.0 g of intermediate 43-1, 84 g of intermediate 1-4, 0.35 g of Pd(PPh 3 ) 4 , 2.58g of K 2 CO 3 (In 9 mL of H 2 O), 9mL of EtOH, 36mL of toluene were placed in RBF, and the mixture was stirred at about 120°C overnight. After the reaction was completed, the reaction solution was extracted with ethyl acetate, the collected organic layer was dried with magnesium sulfate, and the solvent was evaporated. Thereafter, the obtained residue was separated and purified by silica gel column chromatography to obtain 2.98g of compound 43 (yield: 61%). The LC-MS identification values ​​of the obtained compound 43 are as follows.

[0516] C 45 H 30 N 4 Si M+1: 655.23

[0517] (6) Synthesis of Compound 56

[0518] The polycyclic compound 56 according to one or more embodiments may be synthesized by the steps shown in Reaction Scheme 6, for example.

[0519] Reaction Scheme 6

[0520]

[0521] 1) Synthesis of Intermediate 56-1

[0522] 2,4,6-trichloropyrimidine (CAS#: 3764-01-0) was reacted with Intermediate 1-4 under Pd catalysis to obtain Intermediate 56-1. The LC-MS identification value of the obtained Intermediate 56-1 is as follows.

[0523] C 34 H 21 Cl2 N 3 Si M+1: 572.09

[0524] 2) Synthesis of compound 56

[0525] 3.0 g of intermediate 56-1, 1.85 g of 9H-carbazole (CAS#: 86-74-8), 0.24 g of Pd 2 (dba) 3 , 0.45g of S-Phos, 3.18g of NaOtBu, 27mL of o-xylene were placed in RBF, and the mixture was stirred at about 150°C overnight. After the reaction was completed, the reaction solution was extracted with ethyl acetate, the collected organic layer was dried with magnesium sulfate, and the solvent was evaporated. Thereafter, the obtained residue was separated and purified by silica gel column chromatography to obtain 1.97g of compound 56 (yield: 45%). The LC-MS identification values ​​of the obtained compound 56 are as follows.

[0526] C 58 H 37 N 5 Si M+1:832.28

[0527] (7) Synthesis of Compound 103

[0528] The polycyclic compound 103 can be synthesized by the steps shown in Reaction Scheme 7, for example.

[0529] Reaction Scheme 7

[0530]

[0531] 1) Synthesis of Intermediate 103-1 and Intermediate 103-2

[0532] Intermediate 1-1 was reacted with n-BuLi, and the reaction product was then placed in silicon tetrachloride (CAS#: 10026-04-7), and the mixture was stirred at about 0°C for about 2 hours to obtain Intermediate 103-1. 1,3-Dibromobenzene (CAS#: 108-36-1) was reacted with n-BuLi, and the previously obtained Intermediate 103-1 was then placed, and the mixture was stirred at room temperature overnight to obtain Intermediate 103-2. The LC-MS identification value of the obtained Intermediate 103-2 is as follows.

[0533] C 30 H 19 Br 2 NSi M+1: 581.97

[0534] 2) Synthesis of Intermediate 103-3

[0535] Intermediate 103-2 was reacted with n-BuLi, and then trimethyl borate (CAS#: 121-43-7) was added. The mixture was stirred at room temperature overnight, and H 2 O to obtain Intermediate 103-3. The LC-MS identification value of the obtained Intermediate 103-3 is as follows.

[0536] C 30 H 23 B 2 NO 4 Si M+1:512.16

[0537] 3) Synthesis of Compound 103

[0538] 2.0 g of intermediate 43-1, 1.91 g of intermediate 103-3, 0.35 g of Pd(PPh 3 ) 4 , 2.58g of K 2 CO 3 (In 9 mL of H 2 O), 9mL of EtOH, 36mL of toluene were placed in RBF, and the mixture was stirred at 120°C overnight. After the reaction was completed, the reaction solution was extracted with ethyl acetate, the collected organic layer was dried with magnesium sulfate, and the solvent was evaporated. Thereafter, the obtained residue was separated and purified by silica gel column chromatography to obtain 1.72g of compound 103 (yield: 52%). The LC-MS identification values ​​of the obtained compound 103 are as follows.

[0539] C 60 H 39 N 7 Si M+1: 886.31

[0540] 2. Manufacturing and evaluation of light-emitting components

[0541] (1) Manufacturing of light-emitting elements

[0542] A light-emitting element according to one or more embodiments including a polycyclic compound according to one or more embodiments or a comparative compound in an emission layer is manufactured using the method described herein. Light-emitting elements according to Examples 1 to 7 are manufactured using polycyclic compounds according to one or more embodiments as one of the main materials in the emission layer, respectively. Light-emitting elements according to Comparative Examples 1 to 3 are manufactured using Comparative Example Compounds C-1 to C-3 as one of the main materials in the emission layer, respectively.

[0543] A layer of about 15 ohms per square centimeter (Ω / cm 2 )(1,200 Angstroms A glass substrate (product of Corning) having an indium tin oxide (ITO) electrode (as a first electrode) was cut into a size of about 50 millimeters (mm) × 50 mm × 0.5 mm, ultrasonically cleaned for 5 minutes each using isopropyl alcohol and pure water, then ultraviolet irradiated for 30 minutes and then exposed to ozone for cleaning. Then, the glass substrate was mounted on a vacuum deposition device.

[0544] HAT-CN is deposited on the first electrode to form a The hole injection layer will have a thickness of about Compound H-1-1 with a thickness of about 10000 is deposited on the hole injection layer, and then, a HT33 with a thickness of 1000 nm was used to form a hole transport layer.

[0545] HT33, the compound of the example or comparative example, and AD-41 were co-deposited on the hole transport layer in a weight ratio of about 60:27:13 to form a layer having a thickness of about 100 nm. HT33 was used as a hole transport host, each of the example or comparative example compounds was used as an electron transport host, and AD-41 was used as a phosphorescent dopant.

[0546] On the emission layer is deposited a ETH2 with a thickness of about 1:1 was then co-deposited with ETH2 and Liq in a weight ratio of about 1:1 to form a LiF is deposited on the electron transport layer to form a layer having a thickness of about An electron injection layer having a thickness of about 1000 mm was formed, and Al was deposited on the electron injection layer to form a A second electrode with a thickness of 1000 Å is formed, thereby manufacturing a light-emitting element.

[0547] The compounds used for producing the light-emitting element are as follows. Table 1 lists the example compounds and comparative example compounds used for producing the light-emitting element.

[0548] Materials commonly used in the manufacture of light-emitting components

[0549]

[0550] Dopant materials of Examples and Comparative Examples for manufacturing light-emitting elements

[0551] Table 1

[0552]

[0553]

[0554] (2) Evaluation of light-emitting elements

[0555] The light-emitting elements according to the examples and comparative examples were evaluated, and the results are listed in Table 2. 2 ) and the maximum quantum efficiency of the light-emitting elements according to the embodiments and comparative examples were measured at a current density of . The driving voltage of the light-emitting element was measured with a source meter (Keithley Instrument, 2400 series), and the maximum quantum efficiency was measured with an external quantum efficiency measurement system (Hamamatsu Photonics, Model C9920-2-12). The brightness / current density was measured using a luminance meter in which the wavelength sensitivity was calibrated and the measured value was converted by assuming an angular brightness distribution (Lambertian reflectivity) obtained by a completely diffuse reflection surface to obtain the maximum quantum efficiency. The lifetime of the light-emitting element according to Comparative Example 1 was regarded as 100%, and the relative value of the lifetime of the light-emitting elements according to the embodiments and comparative examples other than Comparative Example 1 relative to the lifetime of the light-emitting element according to Comparative Example 1 was calculated as the relative lifetime.

[0556] Table 2

[0557]

[0558] With reference to the results listed in Table 2, each (e.g., all) of the light-emitting elements according to the embodiments and comparative examples show blue emission color characteristics. Compared with the comparative example compound C-1 used in the light-emitting element according to Comparative Example 1, each of the embodiment compounds has a bulky structure, less interaction with adjacent compounds, and therefore has no effect on the emission characteristics. As a result, it can be considered that the light-emitting element according to the embodiment has similar emission color characteristics to the light-emitting element according to the comparative example. In one or more embodiments, the light-emitting element according to the embodiment has similar driving voltage characteristics compared to the light-emitting element according to the comparative example. Compared with the light-emitting element according to the comparative example, the light-emitting element according to the embodiment shows a more excellent or appropriate maximum quantum efficiency. For example, compared with the light-emitting element according to the comparative example, the light-emitting element according to the embodiment shows significantly improved life characteristics, and it can be considered that it is not bound by any particular theory, and it is considered that this is because compared with the light-emitting element according to the comparative example, the light-emitting element according to the embodiment has a more excellent or appropriate material stability (e.g., due to the three-dimensional structural characteristics of the embodiment compound). The content of Table 2 reflects the results of the embodiments added by the inventor. Compared with Comparative Example 1, by having excellent maximum quantum efficiency and low driving voltage characteristics, Example 5 shows excellent driving characteristics.

[0559] Without being bound by any particular theory, it is believed that the polycyclic compound according to one or more embodiments may include a fused ring containing Si and N as ring-forming atoms and a heteroaryl ring in which two or more carbon atoms of the benzene ring are replaced by N. The polycyclic compound according to one or more embodiments may have a bulky three-dimensional structure by containing a fused cyclic ring, in which a portion of the silyl group containing Si is bonded to a carbazole group to form a ring. Due to the characteristics of the three-dimensional structure, the polycyclic compound according to one or more embodiments may have less interaction with adjacent compound molecules. For example, the phenomenon of interference with a dopant used together with the polycyclic compound according to one or more embodiments may be minimized or reduced, and thus the emission characteristics of the dopant are not affected, thereby minimizing or reducing the change in the emission color of the dopant. As a result, the polycyclic compound according to one or more embodiments may have improved color reproducibility of the light-emitting element. In one or more embodiments, the polycyclic compound according to one or more embodiments includes a portion of a silyl group, and thus exhibits bipolar characteristics, thereby having excellent or appropriate material stability.

[0560] The light-emitting element according to one or more embodiments includes the polycyclic compound according to one or more embodiments, and thus can exhibit long life and excellent or appropriate color reproducibility characteristics. In one or more embodiments, the display device according to one or more embodiments includes a light-emitting element having excellent or appropriate color reproducibility and excellent or appropriate luminous efficiency and life characteristics, and thus can exhibit improved display quality.

[0561] The light emitting element according to one or more embodiments includes the polycyclic compound according to one or more embodiments, and thus can exhibit excellent or appropriate color reproducibility and long life characteristics.

[0562] The polycyclic compound according to one or more embodiments may contribute to improving the color purity and long life of a light emitting element.

[0563] The display device according to one or more embodiments may exhibit excellent or appropriate display quality.

[0564] Although the embodiments of the present disclosure have been described so far, it should be understood that the present disclosure should not be limited to these embodiments, but a person skilled in the art may make one or more appropriate changes and modifications within the spirit and technical scope of the present disclosure as claimed below.

[0565] 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 polycyclic compound represented by Formula 1: Formula 1 In formula 1, At least one selected from R1 to R5 is represented by Formula 2, and any remaining selected from R1 to R5 are each independently a hydrogen atom or a deuterium atom: Formula 2 In formula 2, X1 to X3 are each independently N, CH or CD, At least two selected from X1 to X3 are each independently N, L1 and L2 are each independently a directly linked, substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroarylene group having 3 to 30 ring carbon atoms, A1 and A2 are each independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 30 ring carbon atoms, or a substituted or unsubstituted silyl group, and is a portion connected to Formula 1.

2. The polycyclic compound according to claim 1, wherein Formula 2 is represented by Formula 2-1 or Formula 2-2: Formula 2-1 Formula 2-2 In formula 2-2, X 11 is CH or CD, and In formula 2-1 and formula 2-2, L1, L2, A1, A2 and Each is independently as defined in Formula 2.

3. The polycyclic compound according to claim 1, wherein in Formula 2: A1 and A2 are each independently a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazolyl group, or a substituted or unsubstituted triphenylsilyl group; or A1 and A2 are each independently represented by the formula SG, and Any one ring selected from C1 to C5 in formula SG is connected to L1 or L2: Formula SG 4. The polycyclic compound according to claim 3, wherein any one selected from A1 and A2 is represented by the formula SG, and any remaining selected from A1 and A2 is a substituted or unsubstituted phenyl group, a substituted or unsubstituted carbazolyl group, or a substituted or unsubstituted triphenylsilyl group. 5 . The polycyclic compound according to claim 1 , wherein L1 and L2 in Formula 2 are each independently directly linked or substituted or unsubstituted phenylene groups. The polycyclic compound according to claim 1 , wherein at least one of hydrogen atoms selected from the polycyclic compound represented by Formula 1 is substituted with a deuterium atom. The polycyclic compound according to claim 1 , wherein the polycyclic compound represented by Formula 1 is a phosphorescent host.

8. The polycyclic compound according to claim 1, wherein the polycyclic compound is selected from any one of the compounds in compound group 1: Compound Group 1 in, In compound group 1, D is a deuterium atom.

9. A light emitting element, comprising: a first electrode; a second electrode on the first electrode; as well as A functional layer is between the first electrode and the second electrode and includes the polycyclic compound according to any one of claims 1 to 8 as a first compound.

10. The light emitting element according to claim 9, wherein: The functional layer includes 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 At least one selected from the emission layer and the electron transport region includes the first compound. The light-emitting element according to claim 10 , wherein the emission layer includes the first compound and a phosphorescent dopant.

12. The light-emitting element according to claim 10, wherein the emission layer comprises the first compound, the second compound represented by formula D-1, and the third compound represented by formula HT-1: Formula D-1 In formula D-1, Q1 to Q4 are each independently C or N, C1 to C4 are each independently a substituted or unsubstituted hydrocarbon ring group having 5 to 30 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 2 to 30 ring carbon atoms, L 11 To L 13 Each is independently connected to the 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, and Indicates the part connected to C1 to C4, b11 to b13 are each independently 0 or 1, R 61 To R 66 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 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, and d1 to d4 are each independently an integer selected from 0 to 4: Formula HT-1 In formula HT-1, A1 to A8 are each independently N or CR 51 , L1 is a directly linked, 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, Y a For direct connection, CR 52 R 53 or SiR 54 R 55 , Ar1 is 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, and R 51 To R 55 Each is 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-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 60 ring-forming carbon atoms, and / or bonds to an adjacent group to form a ring.

13. The light-emitting element according to claim 12, wherein the emission layer further comprises a fourth compound represented by Formula F-1: Formula F-1 In formula F-1, A1 and A2 are each independently O, S, Se or NR m , R m is 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, and R 1a To R 11a Each is independently a hydrogen atom, a deuterium atom, a halogen atom, a cyano group, a substituted or unsubstituted amine group, a substituted or unsubstituted boron 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, and / or bonds to an adjacent group to form a ring. The light-emitting element according to claim 11 , wherein the emitting layer is configured to emit blue light.

15. A display device, comprising: Basal layer; a circuit layer on the base layer; as well as A display device layer is on the circuit layer and includes the light emitting element according to any one of claims 9 to 14.

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