Organic light-emitting device and electronic apparatus

Abstract

The present application relates to an organic light-emitting device and an electronic apparatus. The organic light-emitting device provided in the present application comprises a cathode, an anode, and an organic light-emitting layer located between the cathode and the anode, wherein a hole transport layer is provided between the organic light-emitting layer and the anode. A first light-emission adjustment layer and a second light-emission adjustment layer are provided between the hole transport layer and the organic light-emitting layer, wherein the first light-emission adjustment layer is adjacent to the organic light-emitting layer, and the second light-emission adjustment layer is adjacent to the hole transport layer; and the first light-emission adjustment layer comprises an organic compound represented by formula I, and the second light-emission adjustment layer comprises a triarylamine compound represented by formula II.

Description

Organic electroluminescent devices and electronic devices

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411639248.2, filed on November 15, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of organic electroluminescence, and more specifically to an organic electroluminescent device and electronic apparatus. Background Technology

[0004] Organic light-emitting diodes (OLEDs) are a type of self-emissive display technology that works based on the property of organic materials to emit light under the influence of an electric current. OLEDs have a relatively complex structure, typically comprising a cathode, an anode, and multiple functional layers sandwiched between them. These functional layers consist of multiple organic or inorganic films and generally include an organic light-emitting layer, a light-adjusting layer, a hole transport layer, and an electron transport layer. These layers are designed to optimize charge injection, transport, and recombination, thereby improving luminous efficiency and device performance. When a voltage is applied between the anode and cathode, an electric field is generated. Under the influence of this electric field, electrons on the cathode side move towards the organic light-emitting layer, and holes on the anode side also move towards it. Electrons and holes combine in the organic light-emitting layer to form excitons. These excitons, in an excited state, release energy, causing the organic light-emitting layer to emit light.

[0005] Since their commercialization, organic light-emitting diodes (OLEDs) have made significant progress in display technology and lighting. With advancements in materials science and manufacturing technology, the performance of OLED devices continues to improve, and their applications are becoming increasingly widespread, ranging from smartphone screens to television displays and flexible display fields such as smart wearables.

[0006] However, OLED technology still faces some challenges and limitations. Firstly, as OLED devices are applied in high-end visual fields such as smart displays, wearables, and AI models, users have increasingly stringent requirements for high resolution, fast response, and low power consumption. This necessitates devices with not only higher luminous efficiency and longer lifespan, but also higher color purity and contrast. Currently, a significant issue affecting the color purity of OLED devices and end-device performance is crosstalk. To address this, two approaches are employed: firstly, optimizing the device circuit design to improve leakage current; and secondly, increasing the lateral resistance of the material to reduce charge leakage and uneven distribution, thereby improving the low efficiency and short lifespan exhibited in practical applications. Summary of the Invention

[0007] The purpose of this application is to provide an organic electroluminescent device and electronic device that solves the problems of low efficiency and short lifespan in application performance.

[0008] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0009] The first aspect of this application provides an organic electroluminescent device, including a cathode, an anode, and an organic light-emitting layer located between the cathode and the anode, wherein a hole transport layer is provided between the organic light-emitting layer and the anode, and a first light-emitting adjustment layer and a second light-emitting adjustment layer are provided between the hole transport layer and the organic light-emitting layer;

[0010] The first light-emitting adjustment layer is adjacent to the organic light-emitting layer, and the second light-emitting adjustment layer is adjacent to the hole transport layer;

[0011] The first light-emitting adjustment layer comprises an organic compound as shown in Formula I;

[0012] The second light-emitting adjustment layer comprises a triarylamine compound as shown in Formula II;

[0013] In formula I, R a and R b One of them is selected from hydrogen or deuterium, and the other is selected from substituted or unsubstituted aryl groups with 6 to 12 carbon atoms;

[0014] R c and R d They may be the same or different, and each is independently selected from substituted or unsubstituted aryl groups having 6 to 12 carbon atoms;

[0015] R a R b R c and R d The substituents in the group may be the same or different, and each is independently selected from deuterium, halogen group, cyano group, alkyl group with 1 to 5 carbon atoms, deuterated alkyl group with 1 to 5 carbon atoms, and haloalkyl group with 1 to 5 carbon atoms.

[0016] L1 and L2 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms.

[0017] Ar is selected from substituted or unsubstituted aryl groups with 12 to 40 carbon atoms or substituted or unsubstituted heteroaryl groups with 12 to 40 carbon atoms;

[0018] The substituents in Ar, L1, and L2 may be the same or different, and each is independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 10 carbon atoms, deuterated alkyl with 1 to 10 carbon atoms, haloalkyl with 1 to 10 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, aryl with 6 to 20 carbon atoms, heteroaryl with 3 to 20 carbon atoms, deuterated aryl with 6 to 20 carbon atoms, deuterated heteroaryl with 3 to 20 carbon atoms, trialkylsilyl with 3 to 12 carbon atoms, or triarylsilyl with 18 to 24 carbon atoms;

[0019] Optionally, any two adjacent substituents among Ar, L1, and L2 form a saturated or unsaturated 5- to 13-membered ring;

[0020] Each R1, each R2, and each R3 may be the same or different, and each is independently selected from hydrogen, deuterium, or halogen groups;

[0021] a is the number of R1s, and a can be selected from 1, 2 or 3. When a is greater than 1, any two R1s can be the same or different.

[0022] b is the number of R2, and b is selected from 1, 2, 3, 4 or 5. When b is greater than 1, any two R2 are the same or different.

[0023] c is the number of R3s, and c is selected from 1 or 2. When c is greater than 1, any two R3s are the same or different.

[0024] In Formula II, Ar3, Ar4, and Ar5 may be the same or different, and each is independently selected from substituted or unsubstituted aryl groups with 12 to 40 carbon atoms or substituted or unsubstituted heteroaryl groups with 12 to 40 carbon atoms.

[0025] L3, L4, and L5 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms.

[0026] The substituents in Ar3, Ar4, Ar5, L3, L4, and L5 may be the same or different, and each is independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 10 carbon atoms, deuterated alkyl with 1 to 10 carbon atoms, haloalkyl with 1 to 10 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, aryl with 6 to 20 carbon atoms, heteroaryl with 3 to 20 carbon atoms, deuterated aryl with 6 to 20 carbon atoms, deuterated heteroaryl with 3 to 20 carbon atoms, trialkylsilyl with 3 to 12 carbon atoms, or triarylsilyl with 18 to 24 carbon atoms;

[0027] Optionally, any two adjacent substituents among Ar3, Ar4, Ar5, L3, L4, and L5 form a saturated or unsaturated 5- to 13-membered ring.

[0028] This application discloses an organic light-emitting device (OLED), comprising a cathode, an anode, an organic light-emitting layer, and a hole transport layer disposed between the anode and the organic light-emitting layer. A first light-emitting adjustment layer adjacent to the organic light-emitting layer and a second light-emitting adjustment layer adjacent to the hole transport layer are disposed between the hole transport layer and the organic light-emitting layer. This application focuses on the organic compound in the first light-emitting adjustment layer, selecting a specific multi-substituted compound containing two disubstituted phenyl segments with different structures and a diaryl fused five-membered / six-membered ring segment. On one hand, the two disubstituted phenyl segments with different structures give the organic compound a high twisted structure, which can effectively improve the lateral resistance of the compound material. Using it in the fabrication of OLED devices can effectively improve the leakage current problem of the device. On the other hand, the multi-meta-substituents in the molecule, combined with the diaryl fused five-membered / six-membered ring segment, make the HOMO energy level of the molecule deeper and the LUMO energy level shallower, thereby increasing the band gap (Eg). When this compound is applied to the first light-emitting adjustment layer adjacent to the organic light-emitting layer in an OLED device, it can effectively block electrons and recombination excitons, thereby significantly improving the efficiency and lifetime of the device.

[0029] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0030] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the following detailed description to explain this application, but do not constitute a limitation thereof.

[0031] Figure 1 is a schematic diagram of the structure of an organic electroluminescent device according to one embodiment of this application.

[0032] Figure 2 is a schematic diagram of an electronic device according to one embodiment of this application.

[0033] Figure Labels

[0034] 100, Anode 200, Cathode 300, Functional Layer 310, Hole Injection Layer

[0035] 320, Hole transport layer; 321, Second light-emitting adjustment layer; 322, First light-emitting adjustment layer; 330, Organic light-emitting layer.

[0036] 340, Electron transport layer; 350, Electron injection layer; 400, Electronic device Detailed Implementation

[0037] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a full understanding of embodiments of this application.

[0038] In a first aspect, this application provides an organic electroluminescent device, including a cathode, an anode, and an organic light-emitting layer located between the cathode and the anode, wherein a hole transport layer is provided between the organic light-emitting layer and the anode, and a first light-emitting adjustment layer and a second light-emitting adjustment layer are provided between the hole transport layer and the organic light-emitting layer;

[0039] The first light-emitting adjustment layer is adjacent to the organic light-emitting layer, and the second light-emitting adjustment layer is adjacent to the hole transport layer;

[0040] The first light-emitting adjustment layer comprises an organic compound as shown in Formula I;

[0041] The second light-emitting adjustment layer comprises a triarylamine compound as shown in Formula II;

[0042] In formula I, R a and R b One of them is selected from hydrogen or deuterium, and the other is selected from substituted or unsubstituted aryl groups with 6 to 12 carbon atoms;

[0043] R c and R d They may be the same or different, and each is independently selected from substituted or unsubstituted aryl groups having 6 to 12 carbon atoms;

[0044] R a R b R c and R d The substituents in the group may be the same or different, and each is independently selected from deuterium, halogen group, cyano group, alkyl group with 1 to 5 carbon atoms, deuterated alkyl group with 1 to 5 carbon atoms, and haloalkyl group with 1 to 5 carbon atoms.

[0045] L1 and L2 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms.

[0046] Ar is selected from substituted or unsubstituted aryl groups with 12 to 40 carbon atoms or substituted or unsubstituted heteroaryl groups with 12 to 40 carbon atoms;

[0047] The substituents in Ar, L1, and L2 may be the same or different, and each is independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 10 carbon atoms, deuterated alkyl with 1 to 10 carbon atoms, haloalkyl with 1 to 10 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, aryl with 6 to 20 carbon atoms, heteroaryl with 3 to 20 carbon atoms, deuterated aryl with 6 to 20 carbon atoms, deuterated heteroaryl with 3 to 20 carbon atoms, trialkylsilyl with 3 to 12 carbon atoms, or triarylsilyl with 18 to 24 carbon atoms;

[0048] Optionally, any two adjacent substituents among Ar, L1, and L2 form a saturated or unsaturated 5- to 13-membered ring;

[0049] Each R1, each R2, and each R3 may be the same or different, and each is independently selected from hydrogen, deuterium, or halogen groups;

[0050] a is the number of R1s, and a can be selected from 1, 2 or 3. When a is greater than 1, any two R1s can be the same or different.

[0051] b is the number of R2, and b is selected from 1, 2, 3, 4 or 5. When b is greater than 1, any two R2 are the same or different.

[0052] c is the number of R3s, and c is selected from 1 or 2. When c is greater than 1, any two R3s are the same or different.

[0053] In Formula II, Ar3, Ar4, and Ar5 may be the same or different, and each is independently selected from substituted or unsubstituted aryl groups with 12 to 40 carbon atoms or substituted or unsubstituted heteroaryl groups with 12 to 40 carbon atoms.

[0054] L3, L4, and L5 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms.

[0055] The substituents in Ar3, Ar4, Ar5, L3, L4, and L5 may be the same or different, and each is independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 10 carbon atoms, deuterated alkyl with 1 to 10 carbon atoms, haloalkyl with 1 to 10 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, aryl with 6 to 20 carbon atoms, heteroaryl with 3 to 20 carbon atoms, deuterated aryl with 6 to 20 carbon atoms, deuterated heteroaryl with 3 to 20 carbon atoms, trialkylsilyl with 3 to 12 carbon atoms, or triarylsilyl with 18 to 24 carbon atoms;

[0056] Optionally, any two adjacent substituents among Ar3, Ar4, Ar5, L3, L4, and L5 form a saturated or unsaturated 5- to 13-membered ring.

[0057] In this application, the descriptive phrases "each...independently is" and "...independently is" and "...independently selected from" are interchangeable and should be interpreted broadly. They can mean either that the specific options expressed by the same symbol in different groups do not affect each other, or that the specific options expressed by the same symbol in the same group do not affect each other. For example, " In this formula, each q is independently 0, 1, 2 or 3, and each R is independently selected from hydrogen, deuterium, fluorine or chlorine. The meaning is as follows: Formula Q-1 indicates that there are q substituents R on the benzene ring. Each R can be the same or different, and the options of each R do not affect each other. Formula Q-2 indicates that there are q substituents R on each benzene ring of biphenyl. The number q of substituents R on the two benzene rings can be the same or different, and each R can be the same or different. The options of each R do not affect each other.

[0058] In this application, the terms "optional" or "optionally" mean that the event or environment described below may, but does not necessarily, occur; the description includes the possibility that the event or environment may or may not occur. For example, "optionally, any two adjacent substituents form a ring" means that any two adjacent substituents may form a ring but are not required to do so, including both scenarios where two adjacent substituents form a ring and scenarios where two adjacent substituents do not form a ring. For example, "optionally, any two adjacent substituents among Ar, L1, and L2 form a saturated or unsaturated 5- to 13-membered ring" includes both scenarios where any two adjacent substituents among Ar, L1, and L2 form a ring and scenarios where any two adjacent substituents among Ar, L1, and L2 do not form a ring.

[0059] In this application, the term "substituted or unsubstituted" means that the functional group described after the term may or may not have substituents (hereinafter, for ease of description, substituents will be collectively referred to as R). p For example, "substituted or unsubstituted aryl" refers to an aryl group having a substituent R. p The aryl group or the unsubstituted aryl group. The substituent mentioned above is R. p For example, it can be deuterium, halogen group, cyano, alkyl, deuterated alkyl, haloalkyl, cycloalkyl, aryl, heteroaryl, deuterated aryl, deuterated heteroaryl, trialkylsilyl, triarylsilyl, etc. The number of substitutions can be one or more.

[0060] In this application, the term "saturated or unsaturated ring" refers to the formation of saturated or unsaturated rings, such as "saturated or unsaturated 3- to 15-membered rings," including saturated carbon rings, saturated heterocycles, partially unsaturated carbon rings, partially unsaturated heterocycles, aromatic carbon rings, and aromatic heterocycles. When "n-membered" is used as a prefix for a ring, n is an integer indicating that the ring has n ring atoms. For example, "3- to 15-membered ring" refers to a ring with 3 to 15 ring atoms, including rings with 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15 ring atoms. Saturated or unsaturated 3- to 15-membered rings include, but are not limited to, benzene rings, naphthalene rings, phenanthrene rings, anthracene rings, fluorene rings, cyclopentane, cyclohexane, adamantane, etc. A saturated ring is, for example, cyclopentane. Cyclohexane adamantane Unsaturated rings, such as benzene rings or fluorene ring

[0061] In this application, a non-positioned linker bond refers to a single bond extending from the ring system. This means that one end of the linking bond can connect to any position in the ring system that the bond passes through, and the other end connects to the rest of the compound molecule.

[0062] In this application, "*" indicates a site where the aromatic ring is fused with an adjacent ring.

[0063] For example, as shown in equation (f) below, the naphthyl group represented by equation (f) is connected to other positions in the molecule through two non-positional linkages that span the bicyclic ring. This means that any possible connection mode is shown in equations (f-1) to (f-10).

[0064] For example, as shown in the following formula (X'), the dibenzofuran group represented by formula (X') is connected to other positions of the molecule through a non-positional linker extending from the middle of one side of the benzene ring. This means that any possible connection mode shown in formulas (X'-1) to (X'-4) is included.

[0065] In this application, a non-positional substituent refers to a substituent connected by a single bond extending from the center of the ring system, indicating that the substituent can be attached to any possible position in the ring system. For example, as shown in equation (Y) below, the substituent R' represented by equation (Y) is connected to the quinoline ring by a non-positional linking bond, which means that it includes any possible connection mode shown in equations (Y-1) to (Y-7).

[0066] In this application, each R1, each R2, each R3, Ar, L1, L2, R a Rb R c R d The carbon number of Ar3, Ar4, Ar5, L3, L4, and L5 refers to the total number of carbon atoms. For example, if L1 is selected from a substituted arylene with 12 carbon atoms, then the arylene and its substituents have a total of 12 carbon atoms.

[0067] In this application, "alkyl" can include straight-chain alkyl or branched alkyl. "Alkyl with 1 to 10 carbon atoms" can have 1 to 10 carbon atoms. In this application, numerical ranges such as "1 to 10" refer to integers within a given range; for example, "1 to 10 carbon atoms" means an alkyl group that may contain 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 carbon atoms. Specific examples include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, n-hexyl, heptyl, n-octyl, 2-ethylhexyl, nonyl, decyl, 3,7-dimethyloctyl, etc.

[0068] In this application, cycloalkyl refers to a group derived from a saturated cyclic carbon chain structure. "Cycloalkyl with 3 to 10 carbon atoms" can have 3 to 10 carbon atoms. In this application, numerical ranges such as "3 to 10" refer to integers within a given range; for example, "5 to 10 carbon atoms" means that it can contain 5, 6, 7, 8, 9, or 10 carbon atoms. Optionally, specific embodiments of cycloalkyl include, but are not limited to, cyclopentyl, cyclohexyl, adamantyl, norbornyl, etc.

[0069] In this application, aryl refers to any optional functional group or substituent derived from an aromatic carbon ring. The aryl group can be a monocyclic aryl (e.g., phenyl) or a polycyclic aryl; in other words, the aryl group can be a monocyclic aryl, a fused-ring aryl, two or more monocyclic aryl groups linked by carbon-carbon bonds, a monocyclic aryl and a fused-ring aryl linked by carbon-carbon bonds, or two or more fused-ring aryl groups linked by carbon-carbon bonds. That is, unless otherwise stated, two or more aromatic groups linked by carbon-carbon bonds can also be considered as the aryl group in this application. Fused-ring aryl groups may include, for example, bicyclic fused aryl (e.g., naphthyl), tricyclic fused aryl (e.g., phenanthrene, fluorene, anthracene), etc. The aryl group does not contain heteroatoms such as B, N, O, S, P, Se, and Si. Examples of aryl groups may include, but are not limited to, phenyl, naphthyl, fluorenyl, spirodifluorenyl, cyclopentanespirenyl, cyclohexanespirenyl, adamantanespirenyl, anthraceneyl, phenanthryl, biphenyl, terphenyl, perylene, pyrene, benzofluoranthyl, etc. 9,10-dihydroanthracene (e.g., 9,10-dihydroanthracene) For example, in this application, the number of carbon atoms in the substituted or unsubstituted aryl group can be 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, or 40. In this application, biphenyl can be understood as a phenyl-substituted aryl group or an unsubstituted aryl group.

[0070] In this application, the term "arylene" refers to a divalent or polyvalent group formed by the further loss of one or more hydrogen atoms from an aryl group.

[0071] In this application, a substituted aryl group refers to an aryl group in which one or more hydrogen atoms are replaced by other groups. For example, at least one hydrogen atom may be replaced by a deuterium, halogen group, cyano, alkyl, deuterated alkyl, haloalkyl, cycloalkyl, aryl, heteroaryl, deuterated aryl, deuterated heteroaryl, trialkylsilyl, or triarylsilyl group. It is understood that the number of carbon atoms in the substituted aryl group refers to the total number of carbon atoms in the aryl group and its substituents. For example, Ar1 is... Therefore, it has 10 carbon atoms.

[0072] In this application, aryl groups used as substituents include, but are not limited to, phenyl, naphthyl, and biphenyl groups.

[0073] In this application, the fluorene group can be substituted by one or more substituents. When the fluorene group is substituted, the substituted fluorene group can be: etc., but not limited to this.

[0074] In this application, terphenyl includes

[0075] In this application, a heteroaryl group refers to a monovalent aromatic ring or its derivative containing 1, 2, 3, 4, 5, or 6 heteroatoms. The heteroatoms can be at least one of B, O, N, P, Si, Se, and S. A heteroaryl group can be a monocyclic heteroaryl group or a polycyclic heteroaryl group. In other words, a heteroaryl group can be a single aromatic ring system or a system of multiple aromatic rings linked by carbon-carbon bonds, and any aromatic ring system can be an aromatic monocyclic ring or an aromatic fused ring. For example, heteroaryl groups may include thiophene, furanyl, pyrrolyl, imidazolyl, thiazolyl, oxazolyl, oxadiazolyl, triazolyl, pyridyl, bipyridyl, pyrimidinyl, triazinyl, acridinel, pyridazinyl, quinolinyl, quinazolinyl, quinoxazinyl, phenoxazinyl, phthalazinyl, pyridopyrimidinyl, pyridopyrazinyl, isoquinolinyl, indolyl, carbazole, benzoxazolyl, benzimidazolyl, benzothiazolyl, benzocarbazole (e.g.) ), benzothiophene, dibenzothiophene, thienzothiophene, benzofuran, phenanthroline, isoxazolyl, thiadiazolyl, benzothiazolyl, phenothiazinyl, silanyl, dibenzofuranyl, and N-arylcarbazoyl (such as N-phenylcarbazoyl), N-heteroarylcarbazoyl (such as N-pyridylcarbazoyl), N-alkylcarbazoyl (such as N-methylcarbazoyl), oxanthyl Benzonaphthofurans (e.g.) The terms include, but are not limited to, thiopheneyl, furanyl, phenanthroline, etc., which are heteroaryl groups of the single aromatic ring type, while N-arylcarbazolyl (such as N-phenylcarbazolyl) and N-heteroarylcarbazolyl are heteroaryl groups of the polycyclic system type connected by carbon-carbon bonds in conjugation. For example, in this application, the number of carbon atoms in the substituted or unsubstituted heteroaryl groups can be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, or 40.

[0076] In this application, the term "hybrid aryl" refers to a divalent or polyvalent group formed by the further loss of one or more hydrogen atoms from a heteroaryl group.

[0077] In this application, the substituted heteroaryl group can be one or more hydrogen atoms of the heteroaryl group that are replaced by groups such as deuterium, halogen group, cyano, alkyl, deuterated alkyl, haloalkyl, cycloalkyl, aryl, heteroaryl, deuterated aryl, deuterated heteroaryl, trialkylsilyl, triarylsilyl, etc.

[0078] It should be understood that the number of carbon atoms in a substituted heteroaryl group refers to the total number of carbon atoms in the heteroaryl group and the substituents on it.

[0079] In this application, the heteroaryl group used as a substituent includes, but is not limited to, dibenzofuranyl, dibenzothiophenyl, carbazoyl, etc.

[0080] In this application, It refers to the chemical bond that connects with other groups.

[0081] In this application, the hydrogen atoms in the compound structure include various isotopes of hydrogen, such as hydrogen (H), deuterium (D), or tritium (T).

[0082] In this application, "deuterated" means that at least one hydrogen ("H") in a compound or group is replaced by deuterium ("D"); specifically, a deuterated compound or deuterated group can be a compound or group in which one, more or all of the available hydrogens have been replaced by deuterium.

[0083] In this application, the halogen group can be fluorine, chlorine, bromine, or iodine.

[0084] In this application, a haloalkyl group can be an alkyl group in which one or more hydrogen atoms are replaced by halogen atoms. Specific examples of haloalkyl groups include, but are not limited to, trifluoromethyl.

[0085] In this application, a deuterated alkyl group can be an alkyl group in which one or more hydrogen atoms are replaced by deuterium. Specific examples of deuterated alkyl groups include, but are not limited to, trideuterated methyl groups.

[0086] In this application, specific examples of trialkylsilyl groups include, but are not limited to, trimethylsilyl groups.

[0087] In this application, specific examples of triarylsilyl groups include, but are not limited to, triphenylsilyl groups.

[0088] In this application, the deuterated aryl group can be one or more hydrogen atoms (H) of the aryl group that are replaced by deuterium (D). Specific examples of deuterated aryl groups include, but are not limited to, pentadeuterated phenyl and heptadeuterated naphthyl.

[0089] In some embodiments, in the organic compound represented by Formula I, each R1, each R2 and each R3 may be the same or different, and each is independently selected from hydrogen, deuterium or fluorine.

[0090] In some embodiments, in the organic compound represented by Formula I, R a and R b One of them is selected from hydrogen or deuterium, and the other is selected from substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl or substituted or unsubstituted biphenyl.

[0091] Optionally, R a and R b The substituents in the group may be the same or different, and each is independently selected from deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trifluoromethyl or trideuterated methyl.

[0092] In some embodiments, in the organic compound represented by Formula I, R a and R b One of them is selected from hydrogen or deuterium, and the other is selected from the group consisting of:

[0093] In some embodiments, in the organic compound represented by Formula I, R a and R b One of them is selected from hydrogen or deuterium, and the other is selected from the group consisting of:

[0094] In some embodiments, in the organic compound represented by Formula I, R a Selected from hydrogen or deuterium, R bSelected from the group consisting of the following groups:

[0095] In some embodiments, in the organic compound represented by Formula I, R b Selected from hydrogen or deuterium, R a Selected from the group consisting of the following groups:

[0096] In some embodiments, in the organic compound represented by Formula I, R c and R d They may be the same or different, and each is independently selected from substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, or substituted or unsubstituted biphenyl.

[0097] Optionally, R c and R d The substituents in the group may be the same or different, and each is independently selected from deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trifluoromethyl or trideuterated methyl.

[0098] In some embodiments, in the organic compound represented by Formula I, R c and R d They may be the same or different, and each is independently selected from the group consisting of the following groups:

[0099] In some embodiments, in the organic compound represented by Formula I, R c and R d They may be the same or different, and each is independently selected from the group consisting of the following groups:

[0100] In some embodiments, in the organic compound represented by Formula I, L1 and L2 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted aryl groups having 6 to 12 carbon atoms, or substituted or unsubstituted heteroaryl groups having 12 to 18 carbon atoms.

[0101] Furthermore, when L1 and L2 are the same or different, and each is independently selected from substituted or unsubstituted aryl groups having 6 to 12 carbon atoms, the number of carbon atoms in the aryl group is selected from 6, 7, 8, 9, 10, 11, or 12; when L1 and L2 are the same or different, and each is independently selected from substituted or unsubstituted heteroaryl groups having 6 to 12 carbon atoms, the number of carbon atoms in the heteroaryl group is selected from 12, 13, 14, 15, 16, 17, or 18.

[0102] Optionally, the substituents in L1 and L2 may be the same or different, and each may be independently selected from deuterium, fluorine, cyano, alkyl with 1 to 5 carbon atoms, deuterated alkyl with 1 to 5 carbon atoms, haloalkyl with 1 to 5 carbon atoms, or phenyl.

[0103] In some embodiments, in the organic compounds represented by Formula I, L1 and L2 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted phenylene, substituted or unsubstituted naphthylene, substituted or unsubstituted biphenylene, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl or substituted or unsubstituted dibenzothiophene.

[0104] Optionally, the substituents in L1 and L2 may be the same or different, and each may be independently selected from deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trideuterated methyl, trifluoromethyl or phenyl.

[0105] In some embodiments, in the organic compounds represented by Formula I, L1 and L2 may be the same or different, and each is independently selected from the group consisting of single bonds or the following groups:

[0106] In some embodiments, in the organic compounds represented by Formula I, L1 and L2 may be the same or different, and each is independently selected from the group consisting of single bonds or the following groups:

[0107] In some embodiments, in the organic compound represented by Formula I, Ar is selected from substituted or unsubstituted aryl groups having 12 to 25 carbon atoms, and substituted or unsubstituted heteroaryl groups having 12 to 24 carbon atoms.

[0108] Furthermore, when Ar is selected from substituted or unsubstituted aryl groups having 12 to 25 carbon atoms, the number of carbon atoms in the aryl group is selected from 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25; when Ar is selected from substituted or unsubstituted heteroaryl groups having 12 to 24 carbon atoms, the number of carbon atoms in the heteroaryl group is selected from 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, or 24.

[0109] Optionally, the substituents in Ar may be the same or different, and each may be independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 5 carbon atoms, haloalkyl with 1 to 5 carbon atoms, deuterated alkyl with 1 to 5 carbon atoms, aryl with 6 to 12 carbon atoms, deuterated aryl with 6 to 12 carbon atoms, heteroaryl with 5 to 12 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, trialkylsilyl or triphenylsilyl with 3 to 8 carbon atoms.

[0110] In some embodiments, in the organic compound represented by Formula I, Ar is selected from substituted or unsubstituted fluorenyl, substituted or unsubstituted spirodifluorenyl, substituted or unsubstituted adamantanespirofluorenyl, substituted or unsubstituted cyclohexanespirofluorenyl, substituted or unsubstituted cyclopentanespirofluorenyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiopheneyl, substituted or unsubstituted carbazoleyl, or substituted or unsubstituted groups of the following:

[0111] Optionally, the substituents in Ar may be the same or different, and each may be independently selected from deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trifluoromethyl, trideuterated methyl, phenyl, pentadeuterated phenyl, naphthyl, biphenyl, dibenzofuranyl, dibenzothiopheneyl, carbazolyl, cyclopropyl, cyclopentyl, cyclohexyl, trimethylsilyl, or triphenylsilyl.

[0112] In some embodiments, in the organic compound represented by Formula I, Ar is selected from the group consisting of:

[0113] In some embodiments, in the organic compound represented by Formula I, Ar is selected from the group consisting of:

[0114] In some embodiments, the organic compound represented by Formula I, Selected from the group consisting of the following structures:

[0115] In some embodiments, the organic compound represented by Formula I, Selected from the group consisting of the following structures:

[0116] In some embodiments, the organic compound represented by Formula I, Selected from the group consisting of the following structures:

[0117] In some embodiments, the organic compound represented by Formula I, Selected from the group consisting of the following structures:

[0118] In some embodiments, the organic compound represented by Formula I, Selected from the group consisting of the following structures:

[0119] In some embodiments, the organic compound represented by Formula I, Selected from the group consisting of the following structures:

[0120] In some embodiments, the organic compound represented by Formula I, Selected from the group consisting of the following structures:

[0121] In some embodiments, the organic compound represented by Formula I, Selected from the group consisting of the following structures:

[0122] In some embodiments, the organic compound represented by Formula I is selected from the following compounds:

[0123] In some embodiments, the structure of the triarylamine compound is shown in Formula II-A:

[0124] In formula II-A, R5 and R6 may be the same or different, and each is independently selected from substituted or unsubstituted alkyl groups having 1 to 10 carbon atoms, substituted or unsubstituted aryl groups having 6 to 40 carbon atoms, or substituted or unsubstituted heteroaryl groups having 3 to 40 carbon atoms.

[0125] Optionally, R5 and R6 form 3 to 15 saturated or unsaturated rings;

[0126] L7 and L8 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms;

[0127] Ar7 and Ar8 are selected from substituted or unsubstituted aryl groups with 12 to 40 carbon atoms or substituted or unsubstituted heteroaryl groups with 12 to 40 carbon atoms.

[0128] The substituents in R5, R6, L7, L8, Ar7, and Ar8 may be the same or different, and each is independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 10 carbon atoms, deuterated alkyl with 1 to 10 carbon atoms, haloalkyl with 1 to 10 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, aryl with 6 to 20 carbon atoms, heteroaryl with 3 to 20 carbon atoms, deuterated aryl with 6 to 20 carbon atoms, deuterated heteroaryl with 3 to 20 carbon atoms, trialkylsilyl with 3 to 12 carbon atoms, or triarylsilyl with 18 to 24 carbon atoms;

[0129] Optionally, any two adjacent substituents among R5, R6, L7, L8, Ar7, and Ar8 form a saturated or unsaturated 5- to 13-membered ring.

[0130] Each R7 and each R8 may be the same or different, and each is independently selected from hydrogen, deuterium, halogen group, cyano, alkyl with 1 to 10 carbon atoms, deuterated alkyl with 1 to 10 carbon atoms, haloalkyl with 1 to 10 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, aryl with 6 to 20 carbon atoms, heteroaryl with 3 to 20 carbon atoms, deuterated aryl with 6 to 20 carbon atoms, deuterated heteroaryl with 3 to 20 carbon atoms, or trialkylsilyl with 3 to 12 carbon atoms;

[0131] d is the number of R7s, and d can be selected from 1, 2, 3 or 4. When d is greater than 1, any two R7s are the same or different.

[0132] e is the number of R8s, and e can be selected from 1, 2 or 3. When e is greater than 1, any two R8s can be the same or different.

[0133] In some embodiments, in the triarylamine compound represented by formula II-A, each R7 and each R8 may be the same or different, and each is independently selected from hydrogen, deuterium, halogen group, cyano, alkyl with 1 to 5 carbon atoms, haloalkyl with 1 to 5 carbon atoms, deuterated alkyl with 1 to 5 carbon atoms, aryl with 6 to 12 carbon atoms, heteroaryl with 12 to 18 carbon atoms, deuterated aryl with 6 to 12 carbon atoms, deuterated heteroaryl with 12 to 18 carbon atoms, or trimethylsilyl.

[0134] In some embodiments, in the triarylamine compound represented by formula II-A, each R7 and each R8 may be the same or different, and each is independently selected from hydrogen, deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trifluoromethyl, trideuterated methyl, phenyl, naphthyl, biphenyl, dibenzofuranyl, dibenzothiophene, pentadeuterated phenyl, or trimethylsilyl.

[0135] In some embodiments, in the triarylamine compound represented by formula II-A, R5 and R6 may be the same or different, and each is independently selected from substituted or unsubstituted alkyl groups having 1 to 5 carbon atoms or substituted or unsubstituted aryl groups having 6 to 12 carbon atoms; optionally, R5 and R6 form a 5- to 13-membered saturated or unsaturated ring.

[0136] Furthermore, when R5 and R6 are the same or different, and each is independently selected from substituted or unsubstituted alkyl groups having 1 to 5 carbon atoms, the number of carbon atoms of the alkyl group is selected from 1, 2, 3, 4 or 5; when R5 and R6 are the same or different, and each is independently selected from substituted or unsubstituted aryl groups having 6 to 12 carbon atoms, the number of carbon atoms of the aryl group is selected from 6, 7, 8, 9, 10, 11 or 12.

[0137] Optionally, the substituents in R5 and R6 may be the same or different, and each may be independently selected from deuterium, halogen groups or cyano groups.

[0138] In some embodiments, in the triarylamine compound represented by formula II-A, R5 and R6 may be the same or different, and each is independently selected from methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, trideuterated methyl, phenyl, naphthyl, biphenyl, pentadeuterated phenyl, or heptadeuterated naphthyl; optionally, R5 and R6 form cyclopentane. Cyclohexane adamantane Or fluorene ring

[0139] In some embodiments, in the triarylamine compound represented by formula II-A, L7 and L8 may be the same or different, and each is independently selected from a single bond, a substituted or unsubstituted aryl group having 6 to 14 carbon atoms, or a substituted or unsubstituted heteroaryl group having 12 to 18 carbon atoms.

[0140] Furthermore, when L7 and L8 are the same or different, and each is independently selected from substituted or unsubstituted aryl groups having 6 to 14 carbon atoms, the number of carbon atoms in the aryl group is selected from 6, 7, 8, 9, 10, 11, 12, 13, or 14; when L7 and L8 are the same or different, and each is independently selected from substituted or unsubstituted heteroaryl groups having 12 to 18 carbon atoms, the number of carbon atoms in the heteroaryl group is selected from 12, 13, 14, 15, 16, 17, or 18.

[0141] Optionally, the substituents in L7 and L8 may be the same or different, and each may be independently selected from deuterium, fluorine, cyano, alkyl with 1 to 5 carbon atoms, deuterated alkyl with 1 to 5 carbon atoms, haloalkyl with 1 to 5 carbon atoms, aryl with 6 to 10 carbon atoms, deuterated aryl with 6 to 10 carbon atoms, or trialkylsilyl with 3 to 9 carbon atoms.

[0142] In some embodiments, in the triarylamine compound represented by formula II-A, L7 and L8 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted phenylene, substituted or unsubstituted naphthylene, substituted or unsubstituted biphenylene, substituted or unsubstituted phenanthylene, substituted or unsubstituted fluorene, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiopheneyl, or substituted or unsubstituted carbazolyl.

[0143] Optionally, the substituents in L7 and L8 may be the same or different, and each may be independently selected from deuterium, fluorine, cyano, methyl, ethyl, n-propyl, isopropyl, tert-butyl, trideuterated methyl, trifluoromethyl, phenyl, naphthyl, pentadeuterated phenyl or trimethylsilyl.

[0144] In some embodiments, in the triarylamine compound represented by formula II-A, L7 and L8 may be the same or different, and each is independently selected from the group consisting of a single bond or the following groups:

[0145] In some embodiments, in the triarylamine compound represented by formula II-A, L7 and L8 may be the same or different, and each is independently selected from the group consisting of a single bond or the following groups:

[0146] In some embodiments, in the triarylamine compound represented by formula II-A, Ar7 and Ar8 may be the same or different, and each is independently selected from substituted or unsubstituted aryl groups having 10 to 31 carbon atoms, or substituted or unsubstituted heteroaryl groups having 12 to 24 carbon atoms.

[0147] Furthermore, when Ar7 and Ar8 are the same or different, and each is independently selected from substituted or unsubstituted aryl groups having 10 to 31 carbon atoms, the number of carbon atoms in the aryl group is selected from 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, or 31; when Ar7 and Ar8 are the same or different, and each is independently selected from substituted or unsubstituted heteroaryl groups having 12 to 24 carbon atoms, the number of carbon atoms in the heteroaryl group is selected from 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, or 24.

[0148] Optionally, the substituents in Ar7 and Ar8 may be the same or different, and each may be independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 5 carbon atoms, haloalkyl with 1 to 5 carbon atoms, deuterated alkyl with 1 to 5 carbon atoms, trialkylsilyl with 3 to 8 carbon atoms, aryl with 6 to 12 carbon atoms, deuterated aryl with 6 to 12 carbon atoms, heteroaryl with 6 to 12 carbon atoms, or deuterated heteroaryl with 6 to 12 carbon atoms.

[0149] In some embodiments, in the triarylamine compound represented by Formula II-A, Ar7 and Ar8 may be the same or different, and each is independently selected from substituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted phenanthyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted spirodifluorenyl, substituted or unsubstituted adamantanespirofluorenyl, substituted or unsubstituted cyclohexanespirofluorenyl, substituted or unsubstituted cyclopentanespirofluorenyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiopheneyl, or substituted or unsubstituted carbazoleyl.

[0150] Optionally, the substituents in Ar7 and Ar8 may be the same or different, and each may be independently selected from deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trifluoromethyl, trideuterated methyl, trimethylsilyl, phenyl, naphthyl, biphenyl, pentadeuterated phenyl, dibenzofuranyl, dibenzothiophenyl, or carbazolyl.

[0151] In some embodiments, in the triarylamine compound represented by formula II-A, Ar7 and Ar8 may be the same or different, and each is independently selected from the group consisting of:

[0152] In some embodiments, in the triarylamine compound represented by formula II-A, Ar7 and Ar8 may be the same or different, and each is independently selected from the group consisting of:

[0153] In some embodiments, the triarylamine compound represented by formula II-A, They may be the same or different, and each is independently selected from the group consisting of the following groups:

[0154] In some embodiments, the triarylamine compound represented by formula II-A is selected from the following compounds:

[0155] In some embodiments, the organic light-emitting device may be a blue organic light-emitting device, a red organic light-emitting device, or a green organic light-emitting device.

[0156] In some specific embodiments, the above-mentioned organic electroluminescent device is a red organic electroluminescent device.

[0157] In one embodiment, the organic electroluminescent device described in this application, as shown in FIG1, may include an anode 100, a hole injection layer 310, a hole transport layer 320, a second light-emitting adjustment layer 321, a first light-emitting adjustment layer 322, an organic light-emitting layer 330, an electron transport layer 340, an electron injection layer 350, and a cathode 200 stacked together.

[0158] Optionally, the anode 100 comprises an anode material, preferably one with a high work function that facilitates hole injection into the functional layer. Specific examples of anode materials include: metals such as nickel, platinum, vanadium, chromium, copper, zinc, and gold, or alloys thereof; metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), and indium zinc oxide (IZO); combinations of metals and oxides such as ZnO:Al or SnO2:Sb; or conductive polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDT), polypyrrole, and polyaniline, but are not limited thereto. Preferably, a transparent electrode comprising indium tin oxide (ITO) as the anode is included.

[0159] Optionally, the hole transport layer 320 may include one or more hole transport materials. The hole transport layer material may be selected from carbazole polymers, carbazole-linked triarylamine compounds, or other types of compounds. Specifically, it may be selected from the compounds shown below or any combination thereof, but is not limited thereto:

[0160] In one specific implementation, the hole transport layer 320 is HT-1.

[0161] In one specific embodiment, the second light-emitting adjustment layer 321 is a triarylamine compound as shown in Formula II of this application.

[0162] In one specific embodiment, the first light-emitting adjustment layer 322 is an organic compound represented by Formula I of this application.

[0163] Optionally, the organic light-emitting layer 330 may be composed of a single organic light-emitting layer material, or it may include a host material and a guest material. Optionally, the organic light-emitting layer 330 is composed of a host material and a guest material. Holes and electrons injected into the organic light-emitting layer 330 can recombine in the organic light-emitting layer 330 to form excitons. The excitons transfer energy to the host material, and the host material transfers energy to the guest material, thereby enabling the guest material to emit light.

[0164] The host material of the organic light-emitting layer 330 can be a metal chelate compound, a bis(styrene) derivative, an aromatic amine derivative, a dibenzofuran derivative, or other types of materials; this application does not impose any special restrictions on this. The host material can be a single host material or a mixture of host materials. Specific examples of the host material include, but are not limited to:

[0165] In one specific embodiment, the main material of the organic light-emitting layer 330 is p-RH-1 and n-RH-1 composition.

[0166] The guest material of the organic light-emitting layer 330 can be selected with reference to existing technologies, such as iridium(III) organometallic complexes, platinum(II) organometallic complexes, ruthenium(II) complexes, etc. Specific examples of the guest material include, but are not limited to:

[0167] In one specific embodiment, the guest material of the organic light-emitting layer 330 is RD-1.

[0168] Optionally, the electron transport layer 340 can be a single-layer structure or a multi-layer structure, and may include one or more electron transport materials. The electron transport materials typically contain metal complexes or / or nitrogen-containing heterocyclic derivatives. The metal complex material may be selected from, for example, LiQ, Alq3, etc. The nitrogen-containing heterocyclic derivative may be an aromatic ring with a nitrogen-containing six-membered or five-membered ring skeleton, a fused aromatic ring compound with a nitrogen-containing six-membered or five-membered ring skeleton, etc. Specific examples include, but are not limited to, 1,10-phenanthroline compounds such as Bphen, NBphen, ET-1, and BimiBphen, or anthracene compounds, triazine compounds, or pyrimidine compounds containing heteroazo aryl groups as shown below. Specific examples of nitrogen-containing heterocyclic derivatives used in electron transport materials include, but are not limited to:

[0169] In one specific embodiment, the electron transport layer 340 is composed of ET-1 and LiQ.

[0170] In this application, the cathode 200 may include a cathode material that has a small work function and facilitates electron injection into the functional layer. Specific examples of cathode materials include, but are not limited to, metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, and lead or alloys thereof; or multilayer materials such as LiF / Al, Liq / Al, LiO2 / Al, LiF / Ca, LiF / Al, and BaF2 / Ca. Preferably, a metal electrode comprising magnesium and silver is included as the cathode.

[0171] Optionally, as shown in Figure 1, a hole injection layer 310 is further disposed between the anode 100 and the hole transport layer 320 to enhance the ability to inject holes into the hole transport layer 320. The hole injection layer 310 can be selected from benzidine derivatives, starburst-like aryl amine compounds, phthalocyanine derivatives, or other materials; this application does not impose any special limitations on this. For example, the compounds contained in the hole injection layer 310 are selected from the group consisting of the following compounds:

[0172] In one specific embodiment, the hole injection layer 310 is composed of HT-1 and PD-1.

[0173] Optionally, as shown in Figure 1, an electron injection layer 350 is further disposed between the cathode 200 and the electron transport layer 340 to enhance the ability to inject electrons into the electron transport layer 340. The electron injection layer 350 may include inorganic materials such as alkali metal sulfides and alkali metal halides, or may include complexes of alkali metals and organic materials. For example, the electron injection layer 350 includes ytterbium (Yb).

[0174] Optionally, the cathode 200 may also have an organic coating layer. This application does not impose any special restrictions on this.

[0175] In one specific embodiment, the organic coating layer comprises compound CP-1.

[0176] Secondly, this application provides an electronic device, including the organic electroluminescent device provided in the first aspect of this application.

[0177] According to one embodiment, as shown in FIG2, the electronic device is a first electronic device 400, which includes the aforementioned organic electroluminescent device. The first electronic device 400 may be, for example, a display device, a lighting device, an optical communication device, or other types of electronic devices, such as, but not limited to, computer screens, mobile phone screens, televisions, electronic paper, emergency lighting, optical modules, etc.

[0178] The following examples illustrate the synthesis methods of the organic compounds described in this application, but this application is not limited in any way as a result.

[0179] Compounds synthesized using methods not mentioned in this application are all raw material products obtained through commercial means.

[0180] I. Synthesis of the organic compounds described in this application

[0181] 1. Synthesis of intermediate IN-Ax: Taking IN-A-1 as an example

[0182] Under nitrogen protection, intermediates 1-bromodibenzofuran (10.0 g, 40.47 mmol), 3-chlorophenylboronic acid (6.7 g, 42.90 mmol), tetra(triphenylphosphine)palladium (1.4 g, 1.21 mmol), tetrabutylammonium bromide (TBAB, 2.61 g, 8.09 mmol), potassium carbonate (12.3 g, 89.00 mmol), toluene (100 mL), ethanol (50 mL), and water (20 mL) were added to a reaction flask. After the addition was complete, stirring was started, and the mixture was heated to 70-75 °C and refluxed for 6 h. The reaction was stopped, cooled to room temperature, and extracted with dichloromethane. The organic phase was washed with water until neutral, dried over anhydrous magnesium sulfate, filtered, and the solvent was removed by vacuum distillation. The mixture was purified by recrystallization from toluene / petroleum ether and dried to give a white solid intermediate IN-A-1 (9.6 g, yield: 85.1%).

[0183] The intermediates IN-Ax (IN-A-2 to IN-A-16) listed in Table 1 were synthesized using the same method as IN-A-1, with the difference that: raw material 1 was used instead of 1-bromodibenzofuran, and raw material 2 was used instead of 3-chlorophenylboronic acid. The main raw materials used, the intermediates synthesized, and their yields are listed in Table 1.

[0184] Table 1

[0185] 2. Synthesis of intermediate IN-NH-x: Taking IN-NH-1 as an example

[0186] Under nitrogen protection, 2-bromo-9,9-dimethylfluorene (120.0 g, 439.29 mmol), 3,5-diphenylaniline (113.16 g, 461.25 mmol), tris(dibenzylacetone)dipalladium (4.02 g, 4.39 mmol), 2-dicyclohexylphosphine-2',4',6'-triisopropylbiphenyl (4.19 g, 8.79 mmol), sodium tert-butoxide (63.32 g, 658.93 mmol), and toluene (1000 mL) were added to a reaction flask. The mixture was stirred and heated to 108 °C for 3 h. After cooling to room temperature, the reaction solution was washed with water and dried with anhydrous magnesium sulfate. After filtration, the solvent was removed from the filtrate under reduced pressure to obtain a yellow solid crude product. The crude product was then purified by recrystallization using toluene / petroleum ether to obtain product IN-NH-1 (155.32 g, yield: 80.8%).

[0187] The IN-NH-x (IN-NH-2~IN-NH-11) in Table 2 were synthesized using the same method as IN-NH-1, with the difference that: starting material 3 was used instead of 2-bromo-9,9-dimethylfluorene, and starting material 4 was used instead of 3,5-diphenylaniline. The main starting materials used, the intermediates synthesized, and the yields are listed in Table 2.

[0188] Table 2

[0189] 3.1 Synthesis Example 1: Synthesis of Compound A1

[0190] Under nitrogen protection, 3-bromotriphenyl (5.0 g, 16.17 mmol), intermediate IN-NH-1 (7.07 g, 16.16 mmol), tris(dibenzylacetone)dipalladium (0.15 g, 0.16 mmol), 2-dicyclohexylphosphine-2′,6′-dimethoxy-biphenyl (0.13 g, 0.32 mmol), sodium tert-butoxide (2.33 g, 24.26 mmol), and toluene (70 mL) were added to a reaction flask. Stirring was started, and the mixture was heated to 108 °C for 6 h. The mixture was then cooled to room temperature, washed with water, dried over anhydrous magnesium sulfate, filtered, and the solvent was removed under reduced pressure to obtain a yellow crude solid. The crude solid was then purified by recrystallization from toluene / petroleum ether to obtain a white solid compound A1 (5.1 g, yield: 47.4%). Mass spectrometry (m / z) z = 666.3 [M+H] + .

[0191] 3.2 Synthesis Example 2 to Synthesis Example 38:

[0192] The compounds listed in Table 3 were synthesized using the same method as compound A1, with the difference that starting material 5 was used instead of 3-bromotriphenyl, and starting material 6 was used instead of IN-NH-1. The main starting materials used, the structures of the product compounds, the yields, and their mass spectra are listed in Table 3.

[0193] Table 3

[0194] II. Synthesis of the triarylamine compounds described in this application

[0195] 1. Synthesis of intermediate Sub-RP-Cx: Taking Sub-RP-C1 as an example

[0196] Under nitrogen protection, the intermediate 1-bromo-3-chloro-2-iodobenzene (50.0 g, 157.55 mmol), dibenzofuran-3-boronic acid (33.4 g, 157.55 mmol), tetra(triphenylphosphine)palladium (3.64 g, 3.15 mmol), tetrabutylammonium bromide (10.16 g, 31.52 mmol), potassium carbonate (47.9 g, 346.62 mmol), toluene (500 mL), ethanol (300 mL), and water (150 mL) were added to a reaction flask. After the addition was complete, the mixture was stirred and heated to 70-75 °C and refluxed for 8 h. The reaction was then stopped, cooled to room temperature, and extracted with dichloromethane. The organic phase was washed with water until neutral, dried over anhydrous magnesium sulfate, filtered, and the solvent was removed by vacuum distillation. The product was purified by recrystallization from ethyl acetate / petroleum ether and dried to give a white solid Sub-RP-BC1 (41.3 g, yield: 73.3%).

[0197] Under nitrogen protection, Sub-RP-BC1 (10.0 g, 27.96 mmol), 2-naphthylboronic acid (5.05 g, 29.36 mmol), tetrakis(triphenylphosphine)palladium (1.62 g, 1.40 mmol), tetrabutylammonium bromide (TBAB, 4.50 g, 13.98 mmol), potassium carbonate (8.5 g, 61.51 mmol), toluene (100 mL), ethanol (50 mL), and water (20 mL) were added to a reaction flask. After the addition was complete, stirring was started, and the mixture was heated to 70-75 °C and refluxed for 6 h. The reaction was stopped, cooled to room temperature, and extracted with dichloromethane. The organic phase was washed with water until neutral, dried over anhydrous magnesium sulfate, filtered, and the solvent was removed by vacuum distillation. The product was purified by recrystallization from toluene / petroleum ether and dried to give a white solid Sub-RP-C1 (7.1 g, yield: 62.8%).

[0198] Following the preparation method of Sub-RP-C1, intermediates Sub-RP-Cx (Sub-RP-C2 to Sub-RP-C5) listed in Table 4 were synthesized via a two-step Suzuki reaction. The difference lies in the following: first, starting material 7 was used instead of 11-bromo-3-chloro-2-iodobenzene, and starting material 8 was used instead of dibenzofuran-3-boronic acid, yielding intermediates Sub-RP-BCx (Sub-RP-BC2 to Sub-RP-BC5); then, starting material 9 was used instead of 2-naphthoboronic acid to react with the obtained intermediate Sub-RP-BCx, yielding the corresponding intermediate Sub-RP-Cx. The main starting materials used, the synthesized intermediates, and their yields are listed in Table 4.

[0199] Table 4

[0200] 2.1 Synthetic Examples 39-57: Synthesis of Compound A1

[0201] The compounds listed in Table 5 were synthesized using the same method as compound A1, with the difference that starting material 10 was used instead of 3-bromotriphenyl, and starting material 11 was used instead of IN-NH-1. The main starting materials used, the structures of the product compounds, the yields, and their mass spectra are listed in Table 5.

[0202] Table 5

[0203] 4. NMR data for some compounds are shown in Table 6:

[0204] Table 6

[0205] Fabrication and evaluation of organic electroluminescent devices

[0206] Example 1: Red Organic Electroluminescent Device

[0207] The anode is prepared through the following process: [The anode thickness is...] On the ITO / Ag / ITO experimental substrate, surface treatment was performed using ultraviolet light, ozone, and O2:N2 plasma to increase the work function of the anode, and the surface of the experimental substrate was cleaned with organic solvents to remove impurities and oil stains.

[0208] On the anode substrate, compounds HT-1 and PD-1 were co-deposited at a deposition rate ratio of 98%:2% to form a layer with a thickness of [missing information]. Hole injection layer.

[0209] Compound HT-1 was deposited on the hole injection layer to form a thickness of [thickness value missing]. The hole transport layer.

[0210] RP7 is deposited on the hole transport layer to form a thickness of [missing information]. The second light-emitting adjustment layer.

[0211] Compound A1 is deposited on the second light-emitting adjustment layer to form a thickness of [thickness value missing]. The first luminescence adjustment layer.

[0212] On the first luminescent adjustment layer, compounds p-RH-1, n-RH-1, and RD-1 were co-deposited at a deposition rate ratio of 55%:45%:2% to form a layer with a thickness of [missing information]. The organic light-emitting layer.

[0213] On the organic light-emitting layer, compounds ET-1 and LiQ were co-deposited at a 50%:50% evaporation rate ratio to form a layer with a thickness of [missing information]. The electron transport layer.

[0214] Ytterbium (Yb) is deposited on the electron transport layer to form a thickness of [missing information]. The electron injection layer.

[0215] On the electron-injected layer, magnesium (Mg) and silver (Ag) are co-deposited at a deposition rate of 10%:90% to form a layer with a thickness of [thickness value missing]. The cathode.

[0216] Finally, compound CP-1 is deposited on the cathode to form a thickness of [thickness value missing]. An organic coating layer is applied to complete the fabrication of a red organic electroluminescent device.

[0217] Examples 2 to 45:

[0218] Organic electroluminescent devices were prepared using the same method as in Example 1, except that: when preparing the second luminescence adjustment layer, the compound RP7 in Example 1 was replaced with the material of the second luminescence adjustment layer in Table 7; and when preparing the first luminescence adjustment layer, the compound A1 in Example 1 was replaced with the material of the first luminescence adjustment layer in Table 7.

[0219] Comparative Examples 1 to 4:

[0220] Organic electroluminescent devices were prepared using the same method as in Example 1, except that: when preparing the second luminescence adjustment layer, the compound RP7 in Example 1 was replaced with the material of the second luminescence adjustment layer in Table 7; and when preparing the first luminescence adjustment layer, the compound A1 in Example 1 was replaced with the material of the first luminescence adjustment layer in Table 7.

[0221] Comparative Examples 5 to 6:

[0222] Organic electroluminescent devices were prepared using the same method as in Example 1, except that: on the hole transport layer, the compound A1 in Example 1 was directly replaced with the first luminescence adjustment layer material in Table 7, and the first luminescence adjustment layer was formed by vapor deposition.

[0223] Comparative Example 7:

[0224] Organic electroluminescent devices were prepared using the same method as in Example 1, except that: the second luminescence adjustment layer material in Table 7 was used to replace compound RP7 in Example 1, and the second luminescence adjustment layer was formed by vapor deposition; an organic luminescence layer was directly vapor deposited on the second luminescence adjustment layer.

[0225] In the fabrication of organic electroluminescent devices, the structures of the various materials used in the comparative and examples are as follows:

[0226] The performance of the red organic electroluminescent devices prepared in Examples 1-45 and Comparative Examples 1-7 was tested, specifically at 15 mA / cm². 2 The IVL performance of the device was tested under the condition of 30 mA / cm. 2 The lifetime of the T95 device was tested under the following conditions, and the test results are shown in Table 7 below.

[0227] Table 7

[0228] As can be seen from Table 7 above, compared with the organic electroluminescent devices of Comparative Examples 1 to 7, the organic electroluminescent devices of Examples 1 to 45 have significantly improved performance, mainly manifested in the following: the operating voltage of the device is reduced by at least 0.18V, the current efficiency is increased by at least 17.8%, and the T95 lifetime is increased by at least 12.0%.

[0229] The reason for this may be:

[0230] Compared with Comparative Examples 1 to 4: First, the organic electroluminescent device of this application has a first luminescence adjustment layer adjacent to the organic light-emitting layer and a second luminescence adjustment layer adjacent to the hole transport layer. Furthermore, this application uses a multi-substituted compound for the first luminescence adjustment layer, which contains two sets of disubstituted phenyl fragments at specific positions. A diaryl fused five- or six-membered ring and its derivative fragments. Compounds with this structural feature exhibit a high degree of twist, which can effectively improve the lateral resistivity of the compound material. Using them in the fabrication of OLED devices can effectively improve the leakage current problem of the devices; simultaneously, the molecule contains... It forms a symmetrical meta-trisubstituted phenyl structure with the N atom. By forming an ortho-trisubstituted or ortho+meta-trisubstituted phenyl configuration with N atoms, and then combining with diaryl fused five-membered / six-membered ring segments, the HOMO energy level of the molecule is deepened and the LUMO energy level is shallowed, thereby increasing the band gap. When this compound is applied to the first light-emitting adjustment layer adjacent to the organic light-emitting layer in OLED devices, it can effectively block electrons and recombination excitons, thereby significantly improving the efficiency and lifetime of the device.

[0231] Compared with Comparative Examples 5 to 7: In addition to using the first light-emitting adjustment layer compound of this application, this application also uses a fluorene compound with 2-position aromatic amine substitution as the material of the second light-emitting adjustment layer adjacent to the hole transport layer, which has high hole mobility. The device structure forms a double-layer light-emitting adjustment layer structure between the hole transport layer and the organic light-emitting layer. Combined with the fluorene compound containing 2-position aromatic amine substitution, which has the function of regulating hole transport and injection, the high transverse resistance material with multiple substitutions at the ortho and meta positions in the first light-emitting adjustment layer can block leakage current and block excitons. The combined effect of the double-layer light-emitting adjustment layer significantly improves the efficiency and lifetime of the device.

[0232] The preferred embodiments of this application have been described in detail above. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

Claims

1. An organic electroluminescent device, comprising a cathode, an anode, and an organic light-emitting layer located between the cathode and the anode, wherein a hole transport layer is provided between the organic light-emitting layer and the anode, characterized in that, A first luminescence adjustment layer and a second luminescence adjustment layer are provided between the hole transport layer and the organic light-emitting layer; The first light-emitting adjustment layer is adjacent to the organic light-emitting layer, and the second light-emitting adjustment layer is adjacent to the hole transport layer; The first light-emitting adjustment layer comprises an organic compound as shown in Formula I; The second light-emitting adjustment layer comprises a triarylamine compound as shown in Formula II; In formula I, R a and R b One of them is selected from hydrogen or deuterium, and the other is selected from substituted or unsubstituted aryl groups with 6 to 12 carbon atoms; R c and R d They may be the same or different, and each is independently selected from substituted or unsubstituted aryl groups having 6 to 12 carbon atoms; R a R b R c and R d The substituents in the group may be the same or different, and each is independently selected from deuterium, halogen group, cyano group, alkyl group with 1 to 5 carbon atoms, deuterated alkyl group with 1 to 5 carbon atoms, and haloalkyl group with 1 to 5 carbon atoms. L1 and L2 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms. Ar is selected from substituted or unsubstituted aryl groups with 12 to 40 carbon atoms or substituted or unsubstituted heteroaryl groups with 12 to 40 carbon atoms; The substituents in Ar, L1, and L2 may be the same or different, and each is independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 10 carbon atoms, deuterated alkyl with 1 to 10 carbon atoms, haloalkyl with 1 to 10 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, aryl with 6 to 20 carbon atoms, heteroaryl with 3 to 20 carbon atoms, deuterated aryl with 6 to 20 carbon atoms, deuterated heteroaryl with 3 to 20 carbon atoms, trialkylsilyl with 3 to 12 carbon atoms, or triarylsilyl with 18 to 24 carbon atoms; Optionally, any two adjacent substituents among Ar, L1, and L2 form a saturated or unsaturated 5- to 13-membered ring; Each R1, each R2, and each R3 may be the same or different, and each is independently selected from hydrogen, deuterium, or halogen groups; a is the number of R1s, and a can be selected from 1, 2 or 3. When a is greater than 1, any two R1s can be the same or different. b is the number of R2, and b is selected from 1, 2, 3, 4 or 5. When b is greater than 1, any two R2 are the same or different. c is the number of R3s, and c is selected from 1 or 2. When c is greater than 1, any two R3s are the same or different. In Formula II, Ar3, Ar4, and Ar5 may be the same or different, and each is independently selected from substituted or unsubstituted aryl groups with 12 to 40 carbon atoms or substituted or unsubstituted heteroaryl groups with 12 to 40 carbon atoms. L3, L4, and L5 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms. The substituents in Ar3, Ar4, Ar5, L3, L4, and L5 may be the same or different, and each is independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 10 carbon atoms, deuterated alkyl with 1 to 10 carbon atoms, haloalkyl with 1 to 10 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, aryl with 6 to 20 carbon atoms, heteroaryl with 3 to 20 carbon atoms, deuterated aryl with 6 to 20 carbon atoms, deuterated heteroaryl with 3 to 20 carbon atoms, trialkylsilyl with 3 to 12 carbon atoms, or triarylsilyl with 18 to 24 carbon atoms; Optionally, any two adjacent substituents among Ar3, Ar4, Ar5, L3, L4, and L5 form a saturated or unsaturated 5- to 13-membered ring.

2. The organic electroluminescent device according to claim 1, characterized in that, In the organic compound represented by Formula I, R a and R b One of them is selected from hydrogen or deuterium, and the other is selected from substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl or substituted or unsubstituted biphenyl; R a and R b The substituents in the group may be the same or different, and each is independently selected from deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trifluoromethyl or trideuterated methyl; Optionally, R c and R d They may be the same or different, and each is independently selected from substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl or substituted or unsubstituted biphenyl; R c and R d The substituents in the group may be the same or different, and each is independently selected from deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trifluoromethyl or trideuterated methyl; Optionally, R a and R b One of them is selected from hydrogen or deuterium, and the other is selected from the group consisting of: Optionally, R c and R d They may be the same or different, and each is independently selected from the group consisting of the following groups:

3. The organic electroluminescent device according to claim 1, characterized in that, In the organic compounds represented by Formula I, L1 and L2 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted aryl groups with 6 to 12 carbon atoms, or substituted or unsubstituted heteroaryl groups with 12 to 18 carbon atoms. The substituents in L1 and L2 may be the same or different, and each is independently selected from deuterium, fluorine, cyano, alkyl with 1 to 5 carbon atoms, deuterated alkyl with 1 to 5 carbon atoms, haloalkyl with 1 to 5 carbon atoms, or phenyl. Optionally, Ar is selected from substituted or unsubstituted aryl groups having 12 to 25 carbon atoms, and substituted or unsubstituted heteroaryl groups having 12 to 24 carbon atoms; The substituents in Ar may be the same or different, and each is independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 5 carbon atoms, haloalkyl with 1 to 5 carbon atoms, deuterated alkyl with 1 to 5 carbon atoms, aryl with 6 to 12 carbon atoms, deuterated aryl with 6 to 12 carbon atoms, heteroaryl with 5 to 12 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, trialkylsilyl or triphenylsilyl with 3 to 8 carbon atoms.

4. The organic electroluminescent device according to claim 1, characterized in that, In the organic compounds represented by Formula I, L1 and L2 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted phenylene, substituted or unsubstituted naphthylene, substituted or unsubstituted biphenylene, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl or substituted or unsubstituted dibenzothiophene. The substituents in L1 and L2 may be the same or different, and each is independently selected from deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trideuterated methyl, trifluoromethyl or phenyl; Optionally, L1 and L2 may be the same or different, and each may be independently selected from the group consisting of single bonds or the following groups:

5. The organic electroluminescent device according to claim 1, characterized in that, In the organic compounds represented by Formula I, Ar is selected from substituted or unsubstituted fluorenyl, substituted or unsubstituted spirodifluorenyl, substituted or unsubstituted adamantanespirofluorenyl, substituted or unsubstituted cyclohexanespirofluorenyl, substituted or unsubstituted cyclopentanespirofluorenyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiopheneyl, substituted or unsubstituted carbazoleyl, or substituted or unsubstituted of the following groups: The substituents in Ar may be the same or different, and each is independently selected from deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trifluoromethyl, trideuterated methyl, phenyl, pentadeuterated phenyl, naphthyl, biphenyl, dibenzofuranyl, dibenzothiopheneyl, carbazolyl, cyclopropyl, cyclopentyl, cyclohexyl, trimethylsilyl, or triphenylsilyl. Optionally, Ar is selected from the group consisting of:

6. The organic electroluminescent device according to claim 1, characterized in that, In the organic compounds represented by Formula I, Selected from the group consisting of the following structures: Optionally, Selected from the group consisting of the following structures: Optionally, Selected from the group consisting of the following structures:

7. The organic electroluminescent device according to claim 1, characterized in that, The organic compounds represented by Formula I are selected from the group consisting of the following compounds:

8. The organic electroluminescent device according to claim 1, characterized in that, The structure of the triarylamine compound is shown in Formula II-A: In formula II-A, R5 and R6 may be the same or different, and each is independently selected from substituted or unsubstituted alkyl groups having 1 to 10 carbon atoms, substituted or unsubstituted aryl groups having 6 to 40 carbon atoms, or substituted or unsubstituted heteroaryl groups having 3 to 40 carbon atoms. Optionally, R5 and R6 form 3 to 15 saturated or unsaturated rings; L7 and L8 may be the same or different, and each is independently selected from single bonds, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, or substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms; Ar7 and Ar8 are selected from substituted or unsubstituted aryl groups with 12 to 40 carbon atoms or substituted or unsubstituted heteroaryl groups with 12 to 40 carbon atoms. The substituents in R5, R6, L7, L8, Ar7, and Ar8 may be the same or different, and each is independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 10 carbon atoms, deuterated alkyl with 1 to 10 carbon atoms, haloalkyl with 1 to 10 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, aryl with 6 to 20 carbon atoms, heteroaryl with 3 to 20 carbon atoms, deuterated aryl with 6 to 20 carbon atoms, deuterated heteroaryl with 3 to 20 carbon atoms, trialkylsilyl with 3 to 12 carbon atoms, or triarylsilyl with 18 to 24 carbon atoms; Optionally, any two adjacent substituents among R5, R6, L7, L8, Ar7, and Ar8 form a saturated or unsaturated 5- to 13-membered ring. Each R7 and each R8 may be the same or different, and each is independently selected from hydrogen, deuterium, halogen group, cyano, alkyl with 1 to 10 carbon atoms, deuterated alkyl with 1 to 10 carbon atoms, haloalkyl with 1 to 10 carbon atoms, cycloalkyl with 3 to 10 carbon atoms, aryl with 6 to 20 carbon atoms, heteroaryl with 3 to 20 carbon atoms, deuterated aryl with 6 to 20 carbon atoms, deuterated heteroaryl with 3 to 20 carbon atoms, or trialkylsilyl with 3 to 12 carbon atoms; d is the number of R7s, and d can be selected from 1, 2, 3 or 4. When d is greater than 1, any two R7s are the same or different. e is the number of R8s, and e can be selected from 1, 2 or 3. When e is greater than 1, any two R8s can be the same or different.

9. The organic electroluminescent device according to claim 8, characterized in that, In the triarylamine compounds represented by Formula II-A, each R7 and each R8 may be the same or different, and each is independently selected from hydrogen, deuterium, halogen group, cyano, alkyl with 1 to 5 carbon atoms, haloalkyl with 1 to 5 carbon atoms, deuterated alkyl with 1 to 5 carbon atoms, aryl with 6 to 12 carbon atoms, heteroaryl with 12 to 18 carbon atoms, deuterated aryl with 6 to 12 carbon atoms, deuterated heteroaryl with 12 to 18 carbon atoms, or trimethylsilyl; Optionally, R5 and R6 may be the same or different, and each is independently selected from substituted or unsubstituted alkyl groups having 1 to 5 carbon atoms or substituted or unsubstituted aryl groups having 6 to 12 carbon atoms; optionally, R5 and R6 form a 5- to 13-membered saturated or unsaturated ring. The substituents in R5 and R6 may be the same or different, and each is independently selected from deuterium, halogen groups or cyano groups; Optionally, L7 and L8 may be the same or different, and each may be independently selected from single bonds, substituted or unsubstituted aryl groups with 6 to 14 carbon atoms, or substituted or unsubstituted heteroaryl groups with 12 to 18 carbon atoms. The substituents in L7 and L8 may be the same or different, and each is independently selected from deuterium, fluorine, cyano, alkyl with 1 to 5 carbon atoms, deuterated alkyl with 1 to 5 carbon atoms, haloalkyl with 1 to 5 carbon atoms, aryl with 6 to 10 carbon atoms, deuterated aryl with 6 to 10 carbon atoms, or trialkylsilyl with 3 to 9 carbon atoms; Optionally, Ar7 and Ar8 may be the same or different, and each is independently selected from substituted or unsubstituted aryl groups with 10 to 31 carbon atoms and substituted or unsubstituted heteroaryl groups with 12 to 24 carbon atoms. The substituents in Ar7 and Ar8 may be the same or different, and each is independently selected from deuterium, halogen groups, cyano, alkyl with 1 to 5 carbon atoms, haloalkyl with 1 to 5 carbon atoms, deuterated alkyl with 1 to 5 carbon atoms, trialkylsilyl with 3 to 8 carbon atoms, aryl with 6 to 12 carbon atoms, deuterated aryl with 6 to 12 carbon atoms, or deuterated heteroaryl with 6 to 12 carbon atoms.

10. The organic electroluminescent device according to claim 8, characterized in that, In the triarylamine compound represented by Formula II-A, R5 and R6 may be the same or different, and each is independently selected from methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, trideuterated methyl, phenyl, naphthyl, biphenyl, pentadeuterated phenyl, or heptadeuterated naphthyl; optionally, R5 and R6 form cyclopentane, cyclohexane, adamantane, or a fluorene ring; Optionally, L7 and L8 may be the same or different, and each may be independently selected from single bonds, substituted or unsubstituted phenylene, substituted or unsubstituted naphthylene, substituted or unsubstituted biphenylene, substituted or unsubstituted phenanthylene, substituted or unsubstituted fluorene, substituted or unsubstituted dibenzofuranylene, substituted or unsubstituted dibenzothiopheneylene, or substituted or unsubstituted carbazolylene. The substituents in L7 and L8 may be the same or different, and each is independently selected from deuterium, fluorine, cyano, methyl, ethyl, n-propyl, isopropyl, tert-butyl, trideuterated methyl, trifluoromethyl, phenyl, naphthyl, pentadeuterated phenyl or trimethylsilyl; Optionally, Ar7 and Ar8 may be the same or different, and each may be independently selected from substituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted phenanthyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted spirodifluorenyl, substituted or unsubstituted adamantanespirofluorenyl, substituted or unsubstituted cyclohexanespirofluorenyl, substituted or unsubstituted cyclopentanespirofluorenyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiopheneyl or substituted or unsubstituted carbazoyl. The substituents in Ar7 and Ar8 may be the same or different, and each is independently selected from deuterium, fluorine, cyano, methyl, ethyl, isopropyl, tert-butyl, trifluoromethyl, trideuterated methyl, trimethylsilyl, phenyl, naphthyl, biphenyl, pentadeuterated phenyl, dibenzofuranyl, dibenzothiopheneyl or carbazoyl.

11. The organic electroluminescent device according to claim 8, characterized in that, In the triarylamine compounds represented by Formula II-A, L7 and L8 may be the same or different, and each is independently selected from the group consisting of a single bond or the following groups: Alternatively, Ar7 and Ar8 may be the same or different, and each may be independently selected from the group consisting of:

12. The organic electroluminescent device according to claim 8, characterized in that, In the triarylamine compound represented by formula II-A, They may be the same or different, and each is independently selected from the group consisting of the following groups:

13. The organic electroluminescent device according to claim 8, characterized in that, The triarylamine compounds represented by Formula II-A are selected from the group consisting of the following compounds:

14. An electronic device comprising the organic electroluminescent device according to any one of claims 1 to 13.

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