Composition and organic electroluminescent device adopting same

Abstract

The present invention provides a composition, particularly a composition for an organic electroluminescent device, the composition comprising a first compound having a structure represented by formula (I-1) or (I-2) and a second compound having a structure represented by formula (II). The composition is easy to prepare and good in thermal stability, meanwhile, the compound can adjust the stability of the material, and finally it is ensured that the photoelectric property of a device prepared from the compound is obviously improved. # imgabs0 #

Description

Technical Field

[0001] The invention relates to the technical field of organic electroluminescence, in particular to a composite material and an organic electroluminescence device with a dual-host structure. Background Art

[0002] Organic light emitting diodes (OLED) are a type of device with a multifunctional layer structure, including positive and negative electrode film layers and organic functional material layers sandwiched between the electrode film layers. When voltage is applied to the electrodes of the OLED device, positive charges are injected from the positive electrode and negative charges are injected from the negative electrode. Under the action of the electric field, the positive and negative charges migrate in the organic layer and meet to compound and excite the dye to emit light. Due to the advantages of high brightness, fast response, wide viewing angle, simple process, and flexibility, OLED devices have attracted much attention in the fields of new display technology and new lighting technology. At present, this technology has been widely used in display panels of new lighting fixtures, smart phones, tablet computers and other products, and will further expand to the application fields of large-size display products such as televisions. It is a new display technology with fast development and high technical requirements.

[0003] As OLED continues to advance in the two major fields of lighting and display, people are paying more attention to the research on its core materials. This is because an OLED device with good efficiency and long life is usually the result of an optimized combination of device structure and various organic materials, which provides great opportunities and challenges for the design and development of functional materials of various structures. Common functional organic materials include: hole injection materials, hole transport materials, hole blocking materials, electron injection materials, electron transport materials, electron blocking materials, luminescent host materials and luminescent guests (dyes), etc.

[0004] In order to prepare OLED light-emitting devices with lower driving voltage, better luminous efficiency and longer device life, and to continuously improve the performance of OLED devices, it is necessary not only to innovate the structure and manufacturing process of OLED devices, but also to continuously study and innovate the optoelectronic functional materials in OLED devices to prepare functional materials with higher performance. Based on this, the OLED material industry has been committed to developing new organic electroluminescent materials to achieve low starting voltage, high luminous efficiency and better device life. In recent years, people in the industry have continuously tried and explored ways to improve device efficiency and stability. Among them, seeking new materials to improve device performance is the most common way. A large number of novel materials have been developed for use in organic electroluminescent devices. Although it has a certain improvement in device performance, it still has a large amount of carrier accumulation at the interface, and there is also the problem of low device efficiency.

[0005] Therefore, the field is in urgent need of developing organic electroluminescent devices with higher performance, and further developing organic electroluminescent materials that can provide better photoelectric performance, especially host materials, is the direction in which the industry continues to strive for breakthroughs. Summary of the invention

[0006] In view of the deficiencies of the prior art, one of the purposes of the present invention is to provide a composition material and an organic electroluminescent device using the material. The composition of the present invention, as the main material in the light-emitting layer of the device, has excellent carrier transport performance, high luminous efficiency, low driving voltage and longer life. The present invention provides an organic electroluminescent device, which adopts the structural design and compounding of a specific first compound and a second compound in the light-emitting layer, so that the carrier transport balance can be achieved in the light-emitting layer of the device, thereby effectively improving the comprehensive performance of the organic electroluminescent device.

[0007] The triazine group has good electron transport capability and is usually used as an electron transport material to improve the electron transport capability. The present invention forms a class of organic materials with excellent electron transport performance by inserting a triazine nitrogen-containing heterocyclic compound into a naphthylphenylfuran ring and performing a specific structural design on this basis. The present invention proposes using a compound containing such a structure as a main material for a light-emitting device, and a dual main material composed of a triarylamine compound containing a large planar conjugated condensed aromatic group is used in an organic electroluminescent device, and the excellent performance effect achieved achieves a reduction in device voltage, an increase in efficiency, and an increase in lifespan.

[0008] In a first aspect of the present invention, a composition for an organic electroluminescent device comprises a first compound and a second compound, wherein the first compound has a structure represented by formula (I-1) or (I-2), and the second compound has a structure represented by formula (II).

[0009] The compounds represented by formula (I-1) and (I-2) are represented by the following structures:

[0010]

[0011] Wherein, A is the structure shown in formula A, and B is the structure shown in formula B1, B2 or B3;

[0012] X is O or S; R1 is selected from one of hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C1-C30 chain alkyl, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C3-C30 cycloalkyl, substituted or unsubstituted C2-C30 heterocycloalkyl, substituted or unsubstituted C3-C30 alkylsilyl, substituted or unsubstituted C6-C60 aryloxy, substituted or unsubstituted C6-C60 aryl, and substituted or unsubstituted C3-C60 heteroaryl;

[0013] a represents an integer from 0 to 4;

[0014] In formula A and formula B, represents the junction site;

[0015] In formula A, Ar1 and Ar2 are each independently selected from one of hydrogen, substituted or unsubstituted C6-C60 aryl, and substituted or unsubstituted C3-C60 heteroaryl; L1, L2, and L3 each independently represent one of a single bond, a substituted or unsubstituted C6-C30 arylene, and a substituted or unsubstituted C3-C30 heteroarylene;

[0016] In formula B1, ring C represents an aromatic structure formed by conjugation with the adjacent benzene ring; ring C represents a substituted or unsubstituted C6-C60 aromatic group fused to the benzene ring, preferably, ring C is fused with the connected benzene ring to form a naphthalene ring, a phenanthrene ring, an anthracene ring, a triphenylene ring, a pyrene ring, More preferably, ring C is a benzene ring fused to the benzene ring. In formula B1 and B2, L4 represents a single bond, a substituted or unsubstituted C6-C60 arylene group, or a substituted or unsubstituted C3-C30 heteroarylene group;

[0017] In formula B1 and B2, X1 and Y1 are each independently selected from a single bond, O, S, CR4R5, and X1 and Y1 are not single bonds at the same time; when B is the structure of formula B1, Y1 is preferably a single bond.

[0018] R4 and R5 are each independently selected from a substituted or unsubstituted C1-C30 chain alkyl group, a substituted or unsubstituted C6-C60 aryl group, or a substituted or unsubstituted C3-C60 heteroaryl group; R4 and R5 are not connected or connected to form a ring; R2 and R3 are each independently selected from a hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted C1-C30 chain alkyl group, a substituted or unsubstituted C1-C30 alkoxy group, a substituted or unsubstituted C3-C30 cycloalkyl group, a substituted or unsubstituted C2-C30 heterocycloalkyl group, a substituted or unsubstituted C3-C30 alkylsilyl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 aryl group, or a substituted or unsubstituted C3-C60 heteroaryl group; in formulas B1 and B2, m and n represent integers from 0 to the maximum allowed;

[0019] In formula B3, L5 represents a single bond, a substituted or unsubstituted C6-C60 arylene group, or a substituted or unsubstituted C3-C30 heteroarylene group, and Ar3 represents a substituted or unsubstituted C6-C60 aryl group, or a substituted or unsubstituted C3-C60 heteroaryl group;

[0020] The substituents substituted in Ar1, Ar2, Ar3, L1, L2, L3, L4, L5, R1, R2, R3, R4, and R5 are each independently selected from at least one of deuterium, halogen, cyano, nitro, hydroxyl, amino, aldehyde, ester, C1-C20 chain alkyl, C3-C20 cycloalkyl, C3-C20 heterocycloalkyl, C1-C10 alkoxy, carboxyl, nitro, cyano, amino, hydroxyl, mercapto, C1-C20 alkylsilyl, C1-C20 alkylamino, C6-C30 arylamino, C3-C30 heteroarylamino, C6-C30 aryloxy, C3-C30 heteroaryloxy, C6-C60 aryl, and C3-C60 heteroaryl.

[0021] “Composition material for an organic electroluminescent device” means that at least two materials that can be used for an organic electroluminescent device exist together or are prepared to exist together. In this article, “existing together” means not only that at least two materials are mixed but also that at least two materials are separated from each other. In addition, the composition material for an organic electroluminescent device is a concept covering materials before being included in an organic electroluminescent device (for example, before vapor deposition) and materials after being included in an organic electroluminescent device (for example, after vapor deposition).

[0022] For example, the composition material for an organic electroluminescent device may include at least two of a hole injection material, a hole transport material, a hole auxiliary material, a luminescent auxiliary material, an electron blocking material, a luminescent material (a host material and / or a dopant material), an electron buffer material, a hole blocking material, an electron transport material, and an electron injection material. The composition material for an organic electroluminescent device may include at least two hole injection materials, at least two hole transport materials, at least two hole auxiliary materials, at least two luminescent auxiliary materials, at least two electron blocking materials, at least two luminescent materials (a host material and / or a dopant material), at least two electron buffer materials, at least two hole blocking materials, at least two electron transport materials, and / or at least two electron transport materials. The composition material for an organic electroluminescent device disclosed herein may be included in any layer constituting the organic electroluminescent device. The at least two materials included in the composition material may be included in one layer together or may be included in different layers respectively. When at least two materials are included in one layer, they may be mixed and evaporated to form a layer, or they may be co-evaporated simultaneously to form a layer respectively. The present invention proposes a composition material for an organic electroluminescent device, which comprises a compound represented by formula (I) and a compound represented by formula (II). The organic electroluminescent device using the composition material of the present invention simultaneously uses compound (I) and compound (II) as functional materials in the organic layer.

[0023] According to the data of the embodiments of the present invention, it is difficult to achieve excellent technical effects by using compound (I) or compound (II) alone. The applicant has found through a large number of experimental designs and studies that, through the structural design of the compound and the synergistic compounding of the two compounds, the organic electroluminescent material has good photoelectric properties and carrier transport properties, and is particularly suitable as a light-emitting layer material of an organic electroluminescent device, effectively improving the overall performance of the device. Among them, the first compound has a good hole transport ability, can play the role of regulating the injection and transmission of holes inside the light-emitting layer, thereby regulating the carrier recombination area in the light-emitting layer, and the first compound has a higher spatial stacking structure. The second compound has the characteristics of hole and electron bipolarity. Compared with the pure electronic host material, it can not only effectively transmit electrons, but also has partial hole transmission. With the assistance of the first compound, the balanced transmission of carriers is achieved to the greatest extent. The organic electroluminescent material effectively balances the carrier transmission of the device through the design and compounding of the two compounds, so that the organic electroluminescent device containing it has higher efficiency and longer life, and the overall performance is further improved.

[0024] It should be noted that, for the sake of convenience, the possible effects of each group / feature are described separately in the present invention, but this does not mean that these groups / features act in isolation. In fact, the reason for obtaining good performance is essentially the optimized combination of the entire molecule, which is the result of the synergistic effect between various groups and structures, rather than the effect of a single group or structure.

[0025] In the present invention, the "substituted or unsubstituted" group may be substituted with one substituent or with multiple substituents. When there are multiple substituents, they may be selected from different substituents. When the same expressions are involved in the present invention, they have the same meanings without special instructions, and the selection range of substituents is as shown above and will not be repeated one by one.

[0026] In the present invention, the expression of chemical elements, unless otherwise specified, includes the concept of isotopes with the same chemical properties. For example, hydrogen (H) includes 1 H (hydrogen), 2 H (deuterium, D), 3 H (tritium, T), etc.; carbon (C) includes 12 C. 13 C, etc.

[0027] In the present invention, the heteroatom of the heteroaryl group is selected from atoms or atomic groups of N, O, S, P, B, Si or Se, preferably N, O or S.

[0028] In the present invention, Represents the connection site. The expression of the ring structure crossed out by “—” or “---------” indicates that the connection site is any position on the ring structure that can form a bond.

[0029] In the present invention, the expression of Ca-Cb represents that the number of carbon atoms in the group is ab. Unless otherwise specified, the number of carbon atoms in the group generally does not include the number of carbon atoms in the substituent.

[0030] In the present invention, “each independently” means that when there are multiple subjects, they may be the same as or different from each other.

[0031] In the present invention, the halogen includes fluorine, chlorine, bromine or iodine.

[0032] In the present invention, the C6-C30 (e.g., C9, C10, C12, C14, C16, C18, C20, C22, C24, C26, C28) aromatic ring includes a single aromatic ring and a condensed aromatic ring; the single aromatic ring includes a benzene ring, a biphenyl ring or a terphenyl ring, and the condensed aromatic ring means that the ring contains at least two aromatic rings, and the aromatic rings share two adjacent carbon atoms and are condensed with each other, exemplarily including but not limited to: naphthalene ring, anthracene ring, phenanthrene ring, indene ring, fluorene ring and its derivatives (9,9-dimethylfluorene ring, benzofluorene ring, etc.), fluoranthene ring, triphenylene ring, pyrene ring, perylene ring, Ring or tetracene ring, etc.

[0033] The C3-C30 (e.g., C4, C5, C6, C9, C10, C12, C14, C16, C18, C20, C22, C24, C26, C28) heteroaromatic ring includes a single heteroaromatic ring or a condensed heteroaromatic ring. The single heteroaromatic ring exemplarily includes, but is not limited to, a pyrrole ring, a pyridine ring, a pyrazine ring, a pyrimidine ring, a pyridazine ring, a furan ring, a thiophene ring, a carbazole ring, and the like. The fused heteroaromatic ring means that the ring structure contains at least one heteroaromatic ring and one aromatic ring (heteroaromatic ring or aromatic ring), and the two share two adjacent atoms to condense each other, and exemplary examples include but are not limited to: quinoline ring, isoquinoline ring, quinoxaline ring, quinazoline ring, benzofuran ring, benzothiophene ring, isobenzofuran ring, isobenzothiophene ring, indole ring, dibenzofuran ring, dibenzothiophene ring, carbazole ring and its derivatives (N-phenylcarbazole ring, benzocarbazole ring, dibenzocarbazole ring, indolecarbazole ring, azacarbazole ring, etc.), acridine ring, phenothiazine ring, phenoxazine ring, hydroacridine ring, etc.

[0034] In the present invention, the C1-C20 chain alkyl group includes C1-C20 straight chain alkyl group and C1-C20 branched chain alkyl group. For example, it can be a chain alkyl group of C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17 or C18, etc.; preferably a C1-C16 chain alkyl group; more preferably a C1-C10 chain alkyl group; illustratively including but not limited to: methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, isopentyl, neopentyl, n-hexyl, n-octyl, n-heptyl, n-nonyl or n-decyl, etc.

[0035] In the present invention, the C2-C10 alkenyl groups can all be C2, C3, C4, C5, C6, C7, C8, C9, C10 alkenyl groups, which contain at least one C=C, illustratively including but not limited to: vinyl, propenyl, allyl, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, butadienyl, pentadienyl, etc.

[0036] Specific examples of the C1-C20 (e.g., C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17 or C18, etc.) alkoxy groups described in the present invention include monovalent groups obtained by connecting the above-mentioned chain alkyl groups to O.

[0037] In the present invention, the C3-C20 cycloalkyl group may be a cycloalkyl group of C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17 or C18, etc., illustratively including but not limited to: cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, adamantyl, etc.

[0038] A specific example of the C1-C20 (e.g., C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17 or C18, etc.) alkylsilyl group is a monovalent group in which at least one hydrogen in -SiH3 is replaced by the above-mentioned chain alkyl group; a specific example of the C1-C20 (e.g., C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17 or C18, etc.) alkylamino group is a monovalent group in which at least one hydrogen in -NH2 is replaced by the above-mentioned chain alkyl group.

[0039] Specific examples of the C2-C20 (e.g., C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17 or C18, etc.) heterocycloalkyl groups of the present invention include monovalent groups in which at least one ring C atom in the above-mentioned cycloalkyl groups is replaced by a heteroatom (e.g., O, S, N or P, etc.), including, but not limited to, epoxy, tetrahydropyrrolyl, tetrahydrofuranyl, tetrahydrothiophenyl, morpholinyl, piperidinyl, etc.

[0040] In the present invention, the C6-C60 aromatic group can be an aromatic group of C6, C9, C10, C12, C14, C16, C18, C20, C22, C24, C26, C28, C30, C32, C34, C36, C38, C40, C42, C44, C46, ​​C48, C50, C52, C54, C56 or C58, preferably a C6-C30 aromatic group, including a monocyclic aromatic group or a condensed ring aromatic group. The monocyclic aromatic group means that the group contains at least one phenyl group. When it contains at least two phenyl groups, the phenyl groups are connected by a single bond, and examples thereof include but are not limited to: phenyl, biphenyl, terphenyl, etc.; the condensed aromatic group means that the group contains at least two aromatic rings, and the aromatic rings share two adjacent carbon atoms and are fused to each other, and examples thereof include but are not limited to: naphthyl, anthracenyl, phenanthrenyl, indenyl, fluorenyl and its derivatives (9,9-dimethylfluorenyl, 9,9-diphenylfluorenyl, 9,9-dinaphthylfluorenyl, spirobifluorenyl, benzofluorenyl, etc.), fluoranthenyl, triphenylene, pyrenyl, peryl, The aforementioned groups include all possible connection modes thereof.

[0041] In the present invention, the C3-C60 heteroaryl group can be a heteroaryl group of C3, C4, C5, C6, C9, C10, C12, C14, C16, C18, C20, C22, C24, C26, C28, C30, C32, C34, C36, C38, C40, C42, C44, C46, ​​C48, C50, C52, C54, C56 or C58, preferably a C3-C30 heteroaryl group, and more preferably a C4-C20 heteroaryl group, including a monocyclic heteroaryl group or a condensed ring heteroaryl group. The monocyclic heteroaryl group means that the molecule contains at least one heteroaryl group. When the molecule contains a heteroaryl group and other groups (such as aryl, heteroaryl, alkyl, etc.), the heteroaryl group and the other groups are connected by a single bond, exemplarily including but not limited to: furanyl, thienyl, pyrrolyl, pyridyl, etc. The fused ring heteroaryl group means a group containing at least one aromatic heterocycle and one aromatic ring (aromatic heterocycle or aromatic ring) in the molecule, and the two share two adjacent atoms that are fused to each other, including but not limited to: benzofuranyl, benzothiophenyl, isobenzofuranyl, isobenzothiophenyl, indolyl, dibenzofuranyl, dibenzothiophenyl, carbazolyl and its derivatives (N-phenylcarbazolyl, N-naphthylcarbazolyl, benzocarbazolyl, dibenzocarbazolyl, indolcarbazolyl, azacarbazolyl, etc.), acridinyl, phenazinyl, phenothiazinyl, phenoxazinyl, hydroacridinyl, etc.; the aforementioned groups include all feasible connection modes thereof.

[0042] Specific examples of the C6-C30 (e.g., C6, C9, C10, C12, C14, C16, C18, C20, C22, C24, C26 or C28, etc.) arylene group of the present invention include divalent groups obtained by removing one hydrogen atom from the above-mentioned aryl groups; specific examples of the C3-C30 (e.g., C3, C4, C5, C6, C9, C10, C12, C14, C16, C18, C20, C22, C24, C26 or C28, etc.) heteroarylene group include divalent groups obtained by removing one hydrogen atom from the above-mentioned heteroaryl groups.

[0043] Specific examples of the C6-C30 (e.g., C6, C9, C10, C12, C14, C16, C18, C20, C22, C24, C26 or C28, etc.) aryloxy groups of the present invention include monovalent groups obtained by connecting the above-mentioned aryl groups to O; specific examples of the C3-C30 (e.g., C3, C4, C5, C6, C9, C10, C12, C14, C16, C18, C20, C22, C24, C26 or C28, etc.) heteroaryloxy groups include monovalent groups obtained by connecting the above-mentioned heteroaryl groups to O.

[0044] The C6-C60 (e.g., C6, C9, C10, C12, C14, C16, C18, C20, C22, C24, C26, C28, C30, C32, C34, C36, C38, C40, C42, C44, C46, ​​C48, C50, C52, C54, C56 or C58, etc.) arylamino group described in the present invention, preferably the C6-C30 arylamino group, is a monovalent group in which at least one hydrogen in -NH2 is replaced by the above aryl group, and illustratively includes but is not limited to phenylamino, methylphenylamino, naphthylamino, anthracenylamino, phenanthrenylamino, biphenylamino and the like.

[0045] The C3-C60 (e.g., C3, C4, C5, C6, C9, C10, C12, C14, C16, C18, C20, C22, C24, C26, C28, C30, C32, C34, C36, C38, C40, C42, C44, C46, ​​C48, C50, C52, C54, C56 or C58, etc.) heteroarylamino group described in the present invention, preferably the C3-C30 heteroarylamino group, is a monovalent group in which at least one hydrogen in -NH2 is replaced by the above-mentioned heteroaryl group, and illustratively includes but is not limited to: pyridylamino, pyrimidinylamino, dibenzofuranylamino, etc.

[0046] Further preferably, the compound of the present invention has a structure as shown in formula (I-11), (I-12) or (I-13):

[0047]

[0048] Wherein: the definitions of X, A, B, R1, and a are the same as those in formula (1).

[0049] Still more preferably, the structure of A is formula A:

[0050] The Ar1 and Ar2 are each independently selected from one of the following substituted or unsubstituted groups: phenyl, naphthyl, anthracenyl, phenanthryl, biphenyl, terphenyl, quaterphenyl, 9,9-dimethylfluorenyl, 9,9-diphenylfluorenyl, 9-methyl-9-phenylfluorenyl, spirofluorenyl, benzofluorenyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, carbazolyl, triazine, triazolyl, pyridyl, pyrimidinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, benzindazolyl, benzocarbazolyl, benzofuranocarbazolyl, benzothiophenocarbazolyl, indolecarbazolyl, azadibenzothiophenyl, azadibenzofuranyl, indenocarbazolyl;

[0051] The L3 is a single bond, a phenyl group, a biphenyl group or a naphthyl group, and more preferably L3 is a single bond or a phenyl group;

[0052] The L1 and L2 are each independently selected from one of the following groups: phenylene, naphthylene, anthracene, phenanthrene, biphenylene, terphenylene, 9,9-dimethylfluorenylene, 9,9-diphenylfluorenylene, 9-methyl-9-phenylfluorenylene, spirofluorenylene, benzofluorenylene, benzofuranylene, benzothiophenylene, dibenzofuranylene, dibenzothiophenylene, carbazolylene, triazineylene, triazolylene, pyridylene, pyrimidylene, quinazolinylene, quinoxalinylene, benzimidazolylene, benzoindazolylene, benzocarbazolylene, benzofuranocarbazolylene, benzothiophenylocarbazolylene, indolecarbazolylene, azadibenzothiophenylene, azadibenzofuranocarbazolylene;

[0053] The substituents substituted in the above Ar1, Ar2, L1, and L2 are each independently selected from one of deuterium, halogen, cyano, C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 alkoxy, C3-C10 heterocycloalkyl, C6-C60 aryl, and C3-C60 heteroaryl.

[0054] More preferably, when B is a structure of formula B1 or B2, L4 is selected from one of the following groups: phenylene, naphthylene, anthracene, phenanthrylene, biphenylene, terphenylene, 9,9-dimethylfluorenylene, 9,9-diphenylfluorenylene, 9-methyl-9-phenylfluorenylene, spirofluorenylene, benzofluorenylene, benzofuranylene, benzothiophenylene, dibenzofuranylene, dibenzothiophenylene, carbazolylene, tri ...terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, terphenylene, Preferably, L4 is a single bond, a phenyl group, a biphenyl group or a naphthyl group, more preferably, L4 is a single bond or a phenyl group; most preferably, L4 is a single bond;

[0055] When B is a structure of formula B1, ring C is selected from one of the following substituted or unsubstituted groups: phenyl, naphthyl, biphenyl.

[0056] More preferably, when B is a structure of formula B1 or B2, it is selected from the following substituted or unsubstituted structures: Represents the connection site. When the following structural formula has a substituent, the substituent is selected from one of deuterium, halogen, cyano, C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 alkoxy, C3-C10 heterocycloalkyl, C6-C60 aryl, and C3-C60 heteroaryl:

[0057]

[0058]

[0059] Preferably, in the above structural formula, L4 is selected from one of the following groups: phenylene, naphthylene, anthracene, phenanthrene, biphenylene, terphenylene, 9,9-dimethylfluorenylene, 9,9-diphenylfluorenylene, 9-methyl-9-phenylfluorenylene, spirofluorenylene, benzofluorenylene, benzofuranylene, benzothiophenylene, dibenzofuranylene, dibenzothiophenylene, carbazolylene, triazineylene, triazolylene, pyridinylene, pyrimidinylene, quinazolinylene, quinoxalinylene, quinoxalinylene, quinazolin ... benzimidazolyl, benzoindazolyl, benzocarbazolyl, benzofuranocarbazolyl, benzothiophenocarbazolyl, indolylcarbazolyl, azadibenzothiophenyl or azadibenzofuranyl; when the above structural formula has a substituent, the substituent is selected from one of deuterium, halogen, cyano, C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 alkoxy, C3-C10 heterocycloalkyl, C6-C60 aryl, and C3-C60 heteroaryl.

[0060] More preferably, in the above formula (I) of the present invention, R1 is selected from one of hydrogen, deuterium, C1-C10 chain alkyl, C1-C10 alkoxy, C3-C10 cycloalkyl, C6-C30 aryloxy, C6-C30 aryl, and C3-C30 heteroaryl;

[0061] Preferably, the R1 is selected from phenyl, biphenyl or naphthyl;

[0062] More preferably, said R1 is selected from hydrogen.

[0063] Specifically, the formula (I) has any one of the structures shown below:

[0064]

[0065]

[0066]

[0067]

[0068]

[0069]

[0070]

[0071]

[0072]

[0073]

[0074]

[0075]

[0076]

[0077]

[0078]

[0079]

[0080]

[0081]

[0082]

[0083]

[0084]

[0085]

[0086]

[0087]

[0088]

[0089]

[0090]

[0091]

[0092]

[0093]

[0094] In the composition of the present invention, the second compound has a structure as shown in formula (II):

[0095]

[0096] In formula (II), Ar7, Ar8, and Ar9 are each independently selected from a substituted or unsubstituted C6-C60 aryl group, or a substituted or unsubstituted C3-C60 heteroaryl group; and at least one of Ar4, Ar5, and Ar6 has a structure as shown in formula (2-1) or (2-2);

[0097]

[0098] In formula (II), L7, L8, and L9 are each independently selected from a single bond, a substituted or unsubstituted C6-C30 arylene group, or a substituted or unsubstituted C3-C30 heteroarylene group;

[0099] In formula (2-1), R 21 , R 22 , R 23 , R 24 are each independently selected from hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C1-C30 chain alkyl, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C3-C30 cycloalkyl, substituted or unsubstituted C2-C30 heterocycloalkyl, substituted or unsubstituted C3-C30 alkylsilyl, substituted or unsubstituted C6-C60 aryloxy, substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted C3-C60 heteroaryl, R 21 , R 22 , R 23 , R 24 Two adjacent ones are not connected or connected to form a loop;

[0100] a, b, and d each independently represent an integer from 0 to 4, and c represents an integer from 0 to 2;

[0101] In formula (2-2), X2 represents S or O;

[0102] In formula (2-2), R 25 , R 26 , R 27 are each independently selected from hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C1-C30 chain alkyl, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C3-C30 cycloalkyl, substituted or unsubstituted C2-C30 heterocycloalkyl, substituted or unsubstituted C3-C30 alkylsilyl, substituted or unsubstituted C6-C60 aryloxy, substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted C3-C60 heteroaryl, R 25 , R 26 , R 27 Two adjacent ones are not connected or connected to form a loop;

[0103] e and g each independently represent an integer from 0 to 4, and f represents an integer from 0 to 2;

[0104] Ar7, Ar8, Ar9, L7, L8, L9, R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 The substituents substituted in the above-mentioned substitution are each independently selected from at least one of deuterium, halogen, cyano, nitro, hydroxyl, amino, aldehyde, ester, C1-C20 chain alkyl, C3-C20 cycloalkyl, C3-C20 heterocycloalkyl, C1-C10 alkoxy, carboxyl, nitro, cyano, amino, hydroxyl, mercapto, C1-C20 alkylsilyl, C1-C20 alkylamino, C6-C30 arylamino, C3-C30 heteroarylamino, C6-C30 aryloxy, C3-C30 heteroaryloxy, C6-C60 aryl, and C3-C60 heteroaryl.

[0105] Further preferably, formula (2-1) has a structure as shown in formula (2-11) or (2-12):

[0106]

[0107] Among them, R 21 , R 22 , R 23 , R 24 The definition ranges of a, b, c, and d are the same as those in formula (2-1);

[0108] Preferably, in formula (2-1) and formula (2-2), R 21 , R 22 , R 23 , R 24 Each is independently selected from hydrogen, deuterium, halogen, substituted or unsubstituted C1-C10 chain alkyl, substituted or unsubstituted C1-C10 alkoxy, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C6-C60 aryloxy, substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted C3-C60 heteroaryl, R 25 , R 26 , R 27 Two adjacent ones are not connected or connected to form a loop.

[0109] Further preferably, formula (2-2) has a structure as shown in any one of formulas (2-21), (2-22) or (2-23):

[0110]

[0111] Among them, X2, R 25 , R 26 , R 27 The definition ranges of , e, f, and g are the same as those in formula (2-2);

[0112] More preferably, formula (2-2) has a substituted or unsubstituted structure as shown in any one of formulas (2-2-1), (2-2-2), (2-2-3), (2-2-4), (2-2-5), and (2-2-6):

[0113]

[0114] In the above formulas (2-212)(2-222)(2-232)(2-242)(2-252)(2-262), X2 represents O or S;

[0115] When the above structural formula has a substituent, the substituent is selected from one of deuterium, halogen, cyano, C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 alkoxy, C3-C10 heterocycloalkyl, C6-C60 aryl, and C3-C60 heteroaryl.

[0116] More preferably, the compound represented by the above formula (II) has any one of the structures shown below:

[0117]

[0118]

[0119]

[0120]

[0121]

[0122]

[0123]

[0124]

[0125]

[0126]

[0127]

[0128]

[0129]

[0130]

[0131]

[0132] In a second aspect, the present invention provides an organic electroluminescent device, comprising a first electrode, a second electrode and one or more light-emitting functional layers inserted between the first electrode and the second electrode, wherein the light-emitting functional layer comprises the composition for an organic electroluminescent device described in the present invention.

[0133] In a preferred embodiment, in the composition for an organic electroluminescent device, the total amount of the compound represented by formula (I) and the compound represented by formula (II) is set to 100%, and the mass percentage of the compound represented by formula (I) is 9%-66.7%; preferably, the mass percentage of the compound represented by formula (I) is 30%-66.7%, and further preferably, the mass percentage of the compound represented by formula (I) is 44%-60%. In a preferred embodiment, in the composition for an organic electroluminescent device, the mass percentage of the compound represented by formula (I) and the compound represented by formula (II) is (0.5 to 2.0) : 1, calculated as the content of the compound of formula (I): the content of the compound of formula (II).

[0134] Preferably, the light-emitting layer further includes a doping material, and more preferably, the doping material is a phosphorescent doping material.

[0135] As for the content of the doping material, in the present invention, the doping material is contained in an amount of 1-10% by mass relative to the total amount of the compound represented by formula (I) and the compound represented by formula (II), for example, it can be 2%, 3%, 4%, 5%, 6%, 7%, 8% or 9%, etc.

[0136] The thickness of the light-emitting layer in the light-emitting functional layer in the organic electroluminescent device is 10-60 nm, preferably 20-50 nm, and more preferably 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm, 50 nm, etc.

[0137] Another aspect of the present invention provides the use of the composition of the present invention as a functional material in an organic electronic device, wherein the organic electronic device includes: an organic electroluminescent device, an optical sensor, a solar cell, a lighting element, an organic thin film transistor, an organic field effect transistor, an information tag, an electronic artificial skin sheet, a sheet-type scanner or an electronic paper.

[0138] The present invention also provides a display device, wherein the display device comprises the organic electroluminescent device.

[0139] In summary, the composition provided by the present invention as a host material is conducive to obtaining higher luminous efficiency and longer service life. The preparation process of the compound of the present invention is simple and easy, the raw materials are easily available, suitable for mass production and amplification, and very suitable for industrial application.

[0140] The OLED device prepared by using the composition of the present invention has high luminous efficiency and better service life, and can meet the requirements of current panel and display manufacturing companies for high-performance materials.

[0141] The above composition of the present invention is suitable for use as a host material, but the application scenarios of the compound of the present invention are not limited to the host material, and can also be used as a hole blocking material, an electron blocking material, etc. for organic electronic devices. Such organic electronic devices include but are not limited to organic electroluminescent devices, optical sensors, solar cells, lighting elements, organic thin film transistors, organic field effect transistors, information tags, electronic artificial skin sheets, sheet-type scanners or electronic paper, preferably organic electroluminescent devices.

[0142] The present invention also provides an organic electroluminescent device, which comprises a first electrode, a second electrode and at least one or more light-emitting functional layers inserted between the first electrode and the second electrode, wherein the light-emitting functional layer contains at least one compound described in the present invention.

[0143] The organic electroluminescent device of the present invention has a structure consistent with that of existing devices, for example, it includes an anode layer, multiple light-emitting functional layers and a cathode layer; the multiple light-emitting functional layers include a light-emitting layer and at least one layer selected from a hole blocking layer, an electron transport layer, and an electron injection layer, wherein at least one layer selected from a main material, an electron blocking layer, and a hole blocking layer contains the above-mentioned organic compound of the present invention.

[0144] The OLED device prepared by using the composition of the present invention has high luminous efficiency and better service life, and can meet the requirements of current panel and display manufacturers for high-performance materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0145] Figure 1 A schematic diagram of the structure of an organic electroluminescent device provided in one specific embodiment of the present invention;

[0146] Among them, 1-substrate, 2-anode, 3-hole injection layer, 4-hole transport layer, 5-electron blocking layer, 6-light-emitting layer, 7-hole blocking layer, 8-electron transport layer, 9-electron injection layer, 10-cathode, and 11-external power supply. DETAILED DESCRIPTION

[0147] The technical solution of the present invention is further described in more detail below. It should be understood by those skilled in the art that the embodiments are only used to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0148] Furthermore, the structure of the organic electroluminescent device of the present invention is a well-known structure, characterized in that the compound of the present invention is used in one or more layers of the light-emitting layer, the hole blocking layer, the electron transport layer, and the electron injection layer. The organic electroluminescent device is described in detail below.

[0149] In one embodiment, a substrate may be used below the first electrode or above the second electrode. The substrate is a glass or polymer material with excellent mechanical strength, thermal stability, water resistance, and transparency. In addition, a thin film transistor (TFT) may also be provided on the substrate used as a display.

[0150] The first electrode can be formed by sputtering or depositing the material used as the first electrode on the substrate. When the first electrode is used as an anode, an oxide transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), tin dioxide (SnO2), zinc oxide (ZnO) and any combination thereof can be used. When the first electrode is used as a cathode, a metal or alloy such as magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), ytterbium (Yb), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag) and any combination thereof can be used.

[0151] The organic layer can be formed on the electrode by vacuum thermal evaporation, spin coating, printing, etc. The compound used as the organic layer can be an organic small molecule, an organic macromolecule or a polymer, and a combination thereof.

[0152] In one embodiment, the organic electroluminescent device includes an anode, a cathode, and an organic layer disposed between the anode and the cathode; the organic layer includes a light-emitting layer, a hole transport region disposed between the light-emitting layer and the anode, and an electron transport region disposed between the light-emitting layer and the cathode.

[0153] The hole transport region is located between the anode and the light-emitting layer. The hole transport region can be a single-layer hole transport layer (HTL), including a single-layer hole transport layer containing only one compound and a single-layer hole transport layer containing multiple compounds. The hole transport region can also be a multilayer structure including at least one layer of a hole injection layer (HIL), a hole transport layer (HTL), and an electron blocking layer (EBL); wherein the HIL is located between the anode and the HTL, and the EBL is located between the HTL and the light-emitting layer.

[0154] The material of the hole transport region can be selected from, but not limited to, phthalocyanine derivatives such as CuPc, conductive polymers or polymers containing conductive dopants such as polyphenylene ethylene, polyaniline / dodecylbenzenesulfonic acid (Pani / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / camphorsulfonic acid (Pani / CSA), polyaniline / poly(4-styrenesulfonate) (Pani / PSS), aromatic amine derivatives; wherein the aromatic amine derivatives include compounds shown in HT-1 to HT-52 below; or any combination thereof.

[0155]

[0156]

[0157]

[0158] The hole injection layer is located between the anode and the hole transport layer. The hole injection layer can be a single compound material or a combination of multiple compounds. For example, the hole injection layer can use one or more compounds of HT-1 to HT-52 mentioned above, or one or more compounds of HI-1 to HI-3 described below; or one or more compounds of HT-1 to HT-52 can be doped with one or more compounds of HI-1 to HI-3 described below.

[0159]

[0160] The light-emitting layer includes a host material (Host, the organic electroluminescent material provided by the present invention), and also includes a light-emitting dye (i.e., a dopant) that can emit different wavelength spectra. The light-emitting layer can also be a monochrome light-emitting layer that emits a single color such as red, green, and blue. A plurality of monochrome light-emitting layers of different colors can be arranged in a plane according to a pixel pattern, or they can be stacked together to form a color light-emitting layer. When light-emitting layers of different colors are stacked together, they can be separated from each other or connected to each other. The light-emitting layer can also be a single color light-emitting layer that can simultaneously emit different colors such as red, green, and blue.

[0161] Depending on the technology, the light-emitting layer material can be phosphorescent electroluminescent material. In an OLED device, a single light-emitting technology can be used, or a combination of multiple different light-emitting technologies can be used. These different light-emitting materials classified by technology can emit light of the same color or different colors.

[0162] In one embodiment of the present invention, the material of the light-emitting layer includes a phosphorescent host material, and the phosphorescent host material is the organic electroluminescent material provided by the present invention, including a combination of a first compound (structure shown in formula I) and a second compound (structure shown in formula (II)).

[0163] In one aspect of the present invention, the light-emitting layer adopts phosphorescent electroluminescence technology. The phosphorescent doping material of the light-emitting layer can be selected from, but not limited to, one or more combinations of GPD-1 to GPD-47 listed below.

[0164]

[0165]

[0166]

[0167] Where D is deuterium.

[0168] In one aspect of the present invention, the light-emitting layer adopts phosphorescent electroluminescence technology. The phosphorescent doping material of the light-emitting layer can be selected from, but not limited to, one or more combinations of RPD-1 to RPD-28 listed below.

[0169]

[0170]

[0171] In one aspect of the present invention, the light-emitting layer adopts phosphorescent electroluminescence technology. The phosphorescent doping material of the light-emitting layer can be selected from, but not limited to, one or more combinations of YPD-1 to YPD-11 listed below.

[0172]

[0173]

[0174] The organic layer may further include an electron transport region between the light-emitting layer and the cathode. The electron transport region may be an electron transport layer (ETL) of a single-layer structure, including a single-layer electron transport layer containing only one compound and a single-layer electron transport layer containing multiple compounds. The electron transport region may also be a multilayer structure including at least one layer of an electron injection layer (EIL), an electron transport layer (ETL), and a hole blocking layer (HBL); wherein the HBL is located between the light-emitting layer and the ETL, and the EIL is located between the cathode and the ETL.

[0175] In one aspect of the present invention, the electron transport layer material can be selected from, but not limited to, one or more combinations of ET-1 to ET-74 listed below.

[0176]

[0177]

[0178]

[0179]

[0180] In one aspect of the present invention, a hole blocking layer (HBL) is located between the electron transport layer and the light emitting layer. The hole blocking layer may be one or more compounds of the above ET-1 to ET-74, but is not limited thereto.

[0181] The device may also include an electron injection layer located between the electron transport layer and the cathode. The electron injection layer material includes, but is not limited to, one or more combinations of the following:

[0182] LiQ, LiF, NaCl, CsF, Li2O, Cs2CO3, BaO, Na, Li, Ca, Mg, Yb.

[0183] Device Embodiment

[0184] Example 1-1

[0185] An organic electroluminescent material and an organic electroluminescent device comprising the same; the organic electroluminescent material comprises a combination of a first compound A-1 and a second compound B-15, wherein the mass ratio of the first compound A-1 to the second compound B-15 is 1:1.

[0186] An organic electroluminescent device comprising the organic electroluminescent material has a structural schematic diagram as shown in Figure 1 As shown, it includes a substrate 1 (glass substrate), an anode 2 (ITO), a hole injection layer 3, a hole transport layer 4, an electron blocking layer 5, a light emitting layer 6, a hole blocking layer 7, an electron transport layer 8, an electron injection layer 9, and a cathode 10 (Al) which are stacked in sequence; an external power supply is applied between the anode 2 and the cathode 10.

[0187] The preparation method of the organic electroluminescent device is as follows:

[0188] (1) a glass substrate coated with an ITO transparent conductive layer is ultrasonically treated in a commercial cleaning agent, rinsed in deionized water, ultrasonically degreased in a mixed solvent of acetone / ethanol, baked in a clean environment until moisture is completely removed, cleaned with ultraviolet light and ozone, and bombarded with a low-energy cation beam;

[0189] (2) Place the glass substrate with the anode in a vacuum chamber and evacuate the chamber to a vacuum of less than 1×10 -5Pa, vacuum evaporating a mixture of compound HT-4:HI-3 (97 / 3, w / w) on the above anode layer as a hole injection layer, the evaporation rate is 0.1 nm / s, and the thickness of the evaporation film is 10 nm;

[0190] (3) vacuum evaporating compound HT-4 on the hole injection layer as a hole transport layer, with an evaporation rate of 0.1 nm / s and a total evaporation film thickness of 60 nm;

[0191] (4) vacuum evaporating compound HT-52 on the hole transport layer as an electron blocking layer, with an evaporation rate of 0.1 nm / s and a total evaporation film thickness of 60 nm;

[0192] (5) vacuum evaporating the light-emitting layer of the device on the electron blocking layer, a ternary mixture of the main material of the light-emitting layer (the organic electroluminescent material, A-1:B-15=1:1) and the doping material (dye, RPD-14), the mass percentage of the doping material in the light-emitting layer is 3%; the evaporation rate is 0.1 nm / s, and the total evaporation film thickness is 40 nm;

[0193] (6) vacuum evaporating compound ET-74 on the light-emitting layer as a hole blocking layer, with an evaporation rate of 0.1 nm / s and a total evaporation film thickness of 5 nm;

[0194] (7) vacuum evaporating a mixture of compounds ET-69:ET-57 (50 / 50, w / w) on the hole blocking layer as an electron transport layer, with an evaporation rate of 0.1 nm / s and a total evaporation film thickness of 25 nm;

[0195] (8) Vacuum evaporating LiF with a thickness of 1 nm on the electron transport layer as an electron injection layer at a evaporation rate of 0.1 nm / s;

[0196] (9) Aluminum with a thickness of 150 nm was vacuum-deposited on the electron injection layer as a cathode at a deposition rate of 1 nm / s.

[0197] Thus, an organic electroluminescent device sample of Example 1-1 was obtained.

[0198] The preparation methods of Examples 1-2 to 13-3 and Comparative Example 1-4 are the same as those of Example 1-1, except that the first host or the second host is replaced with the corresponding compounds in Table 1 and Table 2 below

[0199] Comparison of compound structures:

[0200]

[0201] Performance test of organic electroluminescent devices:

[0202] At the same brightness of 3000cd / m 2Under the condition of constant current, the current density of the organic electroluminescent device is measured using a digital source meter and a brightness meter. The ratio of brightness to current density is the current efficiency. When the current is kept constant, the device is recorded from the initial brightness of 10000cd / m 2 Attenuation to 9700cd / m 2 The time taken to obtain the test value of LT97 life.

[0203] The test values ​​of the operating voltage, current efficiency and LT97 life of comparative example 1 are recorded as 1, and the operating voltage, current efficiency and LT97 life of other embodiments and comparative examples are the ratios of their respective test values ​​to the test values ​​of comparative example 1; the test results are shown in Table 1.

[0204] Table 1:

[0205]

[0206]

[0207]

[0208] As can be seen from the data in Table 1 above, the compound formula (I) of the present invention is based on naphthobenzofuran as the parent nucleus, and a triazine structure and a specific aromatic group are introduced on its naphthalene ring. The triazine group is an electron-deficient group, which makes the lowest unoccupied electron orbital energy level (LUMO energy level) of the molecule lower, reduces the band gap energy difference of adjacent functional layers, and the aromatic group improves the conjugation degree of the molecule, further improving the material's ability to transmit electrons; Formula (II) is through the triarylamine structure containing a coplanar large conjugated aromatic group, because it has a larger conjugated plane, which is conducive to the discreteness of π electrons and the stacking of materials during film formation, which helps the transition of π electrons between molecules, and can improve the hole mobility of aromatic amine materials. By the specific compounding of formula (I) and formula (II) compounds, as a binary host material for the light-emitting layer of the device, the mobility of holes and electrons in the light-emitting layer is greatly improved, and the transmission of carriers is more balanced, thereby improving the recombination efficiency of carriers, so that more exciton energy can be used by dyes, further improving the efficiency of the device, effectively improving the service life of the device, and lower operating voltage. It can be seen from this that the composite combination of the first compound and the second compound of the present invention can be used as an excellent dual-host material, and the organic light-emitting electroluminescent device prepared using the dual-host material can obtain excellent device performance.

[0209] The applicant declares that the present invention illustrates the organic electroluminescent material and the organic electroluminescent device of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned process steps, that is, it does not mean that the present invention must rely on the above-mentioned process steps to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the raw materials selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A composition for an organic electroluminescent device, comprising a first compound and a second compound, characterized in that: The first compound has a structure represented by formula (I-1) or (I-2), and the second compound has a structure represented by formula (II): Wherein, A is the structure shown in formula A, and B is the structure shown in formula B1, B2 or B3; X is O or S; R1 is selected from one of hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C1-C30 chain alkyl, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C3-C30 cycloalkyl, substituted or unsubstituted C2-C30 heterocycloalkyl, substituted or unsubstituted C3-C30 alkylsilyl, substituted or unsubstituted C6-C60 aryloxy, substituted or unsubstituted C6-C60 aryl, and substituted or unsubstituted C3-C60 heteroaryl; a represents an integer from 0 to 4; In formula A and formula B, Dashed lines represent junction sites; In formula A, Ar1 and Ar2 are each independently selected from one of hydrogen, substituted or unsubstituted C6-C60 aryl, and substituted or unsubstituted C3-C60 heteroaryl; L1, L2, and L3 each independently represent one of a single bond, a substituted or unsubstituted C6-C30 arylene, and a substituted or unsubstituted C3-C30 heteroarylene; In formula B1, ring C represents a substituted or unsubstituted C6-C60 aromatic group fused to the benzene ring; In formula B1 and B2, L4 represents a single bond, a substituted or unsubstituted C6-C60 arylene group, or a substituted or unsubstituted C3-C30 heteroarylene group; In formula B1 and B2, X1 and Y1 are each independently selected from a single bond, O, S, CR4R5, and X1 and Y1 are not single bonds at the same time; R4 and R5 are each independently selected from a substituted or unsubstituted C1-C30 chain alkyl group, a substituted or unsubstituted C6-C60 aryl group, or a substituted or unsubstituted C3-C60 heteroaryl group; R4 and R5 are not connected or connected to form a ring; In formula B1 and B2, R2 and R3 are each independently selected from one of hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C1-C30 chain alkyl, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C3-C30 cycloalkyl, substituted or unsubstituted C2-C30 heterocycloalkyl, substituted or unsubstituted C3-C30 alkylsilyl, substituted or unsubstituted C6-C60 aryloxy, substituted or unsubstituted C6-C60 aryl, and substituted or unsubstituted C3-C60 heteroaryl; In formula B1 and B2, m and n represent integers from 0 to the maximum allowed; In formula B3, L5 represents a single bond, a substituted or unsubstituted C6-C60 arylene group, or a substituted or unsubstituted C3-C30 heteroarylene group, and Ar3 represents a substituted or unsubstituted C6-C60 aryl group, or a substituted or unsubstituted C3-C60 heteroaryl group; The substituents substituted in Ar1, Ar2, Ar3, L1, L2, L3, L4, L5, R1, R2, R3, R4, and R5 are each independently selected from at least one of deuterium, halogen, cyano, nitro, hydroxyl, amino, aldehyde, ester, C1-C20 chain alkyl, C3-C20 cycloalkyl, C3-C20 heterocycloalkyl, C1-C10 alkoxy, carboxyl, nitro, cyano, amino, hydroxyl, mercapto, C1-C20 alkylsilyl, C1-C20 alkylamino, C6-C30 arylamino, C3-C30 heteroarylamino, C6-C30 aryloxy, C3-C30 heteroaryloxy, C6-C60 aryl, and C3-C60 heteroaryl; In formula (II), Ar7, Ar8, and Ar9 are each independently selected from a substituted or unsubstituted C6-C60 aryl group, or a substituted or unsubstituted C3-C60 heteroaryl group; and at least one of Ar7, Ar8, and Ar9 has a structure as shown in formula (2-1) or (2-2); In formula (II), L7, L8, and L9 are each independently selected from a single bond, a substituted or unsubstituted C6-C30 arylene group, or a substituted or unsubstituted C3-C30 heteroarylene group; In formula (2-1), R 21 , R 22 , R 23 , R 24 are each independently selected from hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C1-C30 chain alkyl, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C3-C30 cycloalkyl, substituted or unsubstituted C2-C30 heterocycloalkyl, substituted or unsubstituted C3-C30 alkylsilyl, substituted or unsubstituted C6-C60 aryloxy, substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted C3-C60 heteroaryl, R 21 , R 22 , R 23 , R 24 Two adjacent ones are not connected or connected to form a loop; a, b, and d each independently represent an integer from 0 to 4, and c represents an integer from 0 to 2; In formula (2-2), X2 represents S or O; In formula (2-2), R 25 , R 26 , R 27 are each independently selected from hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C1-C30 chain alkyl, substituted or unsubstituted C1-C30 alkoxy, substituted or unsubstituted C3-C30 cycloalkyl, substituted or unsubstituted C2-C30 heterocycloalkyl, substituted or unsubstituted C3-C30 alkylsilyl, substituted or unsubstituted C6-C60 aryloxy, substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted C3-C60 heteroaryl, R 25 , R 26 , R 27 Two adjacent ones are not connected or connected to form a loop; e and g each independently represent an integer from 0 to 4, and f represents an integer from 0 to 2; Ar7, Ar8, Ar9, L7, L8, L9, R 21 , R 22 , R 23 , R 24 , R 25 , R 26 , R 27 The substituents substituted in the above-mentioned substitution are each independently selected from at least one of deuterium, halogen, cyano, nitro, hydroxyl, amino, aldehyde, ester, C1-C20 chain alkyl, C3-C20 cycloalkyl, C3-C20 heterocycloalkyl, C1-C10 alkoxy, carboxyl, nitro, cyano, amino, hydroxyl, mercapto, C1-C20 alkylsilyl, C1-C20 alkylamino, C6-C30 arylamino, C3-C30 heteroarylamino, C6-C30 aryloxy, C3-C30 heteroaryloxy, C6-C60 aryl, and C3-C60 heteroaryl.

2. The composition for an organic electroluminescent device according to claim 1, characterized in that: The first compound has a structure as shown in formula (I-11), (I-12) or (I-13): Wherein: the definitions of X, A, B, R1, and a are the same as those in formula (1); Preferably, when B is a structure of formula B1, ring C is a benzene ring, a naphthalene ring, a phenanthrene ring, Ring or triphenylene ring; preferably, ring C is a benzene ring fused to the benzene ring; When B is a structure of formula B1, Y1 is a single bond.

3. The composition for an organic electroluminescent device according to claim 2, characterized in that: The A is a structure of formula A: The Ar1 and Ar2 are each independently selected from one of the following substituted or unsubstituted groups: phenyl, naphthyl, anthracenyl, phenanthryl, biphenyl, terphenyl, quaterphenyl, 9,9-dimethylfluorenyl, 9,9-diphenylfluorenyl, 9-methyl-9-phenylfluorenyl, spirofluorenyl, benzofluorenyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, carbazolyl, triazine, triazolyl, pyridyl, pyrimidinyl, quinazolinyl, quinoxalinyl, benzimidazolyl, benzindazolyl, benzocarbazolyl, benzofuranocarbazolyl, benzothiophenocarbazolyl, indolecarbazolyl, azadibenzothiophenyl, azadibenzofuranyl, indenocarbazolyl; The L3 is a single bond, a phenyl group, a biphenyl group or a naphthyl group, and more preferably L3 is a single bond or a phenyl group; The L1 and L2 are each independently selected from one of the following groups: phenylene, naphthylene, anthracene, phenanthrene, biphenylene, terphenylene, 9,9-dimethylfluorenylene, 9,9-diphenylfluorenylene, 9-methyl-9-phenylfluorenylene, spirofluorenylene, benzofluorenylene, benzofuranylene, benzothiophenylene, dibenzofuranylene, dibenzothiophenylene, carbazolylene, triazineylene, triazolylene, pyridylene, pyrimidylene, quinazolinylene, quinoxalinylene, benzimidazolylene, benzoindazolylene, benzocarbazolylene, benzofuranocarbazolylene, benzothiophenylocarbazolylene, indolecarbazolylene, azadibenzothiophenylene, azadibenzofuranocarbazolylene; The substituents substituted in the above Ar1, Ar2, L1, and L2 are each independently selected from one of deuterium, halogen, cyano, C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 alkoxy, C3-C10 heterocycloalkyl, C6-C60 aryl, and C3-C60 heteroaryl.

4. The composition for an organic electroluminescent device according to claim 2, characterized in that: When B is a structure of formula B1, ring C is selected from one of the following substituted or unsubstituted groups: phenyl, naphthyl, biphenyl; When B is a structure of formula B1 or B2, L4 is a single bond, phenyl, biphenyl or naphthyl; Preferably, L4 is a single bond or a phenyl group; most preferably, L4 is a single bond.

5. The composition for an organic electroluminescent device according to claim 2, characterized in that: When B is a structure of formula B1 or B2, it is selected from the following substituted or unsubstituted structures: Represents the connection site. When the following structural formula has a substituent, the substituent is selected from one of deuterium, halogen, cyano, C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 alkoxy, C3-C10 heterocycloalkyl, C6-C60 aryl, and C3-C60 heteroaryl: Preferably, in the above structural formula, L4 is selected from one of the following groups: phenylene, naphthylene, anthracene, phenanthrene, biphenylene, terphenylene, 9,9-dimethylfluorenylene, 9,9-diphenylfluorenylene, 9-methyl-9-phenylfluorenylene, spirofluorenylene, benzofluorenylene, benzofuranylene, benzothiophenylene, dibenzofuranylene, dibenzothiophenylene, carbazolylene, triazineylene, triazolylene, pyridinylene, pyrimidinylene, quinazolinylene, quinoxalinylene, quinoxalinylene, quinazolin ... benzimidazolyl, benzoindazolyl, benzocarbazolyl, benzofuranocarbazolyl, benzothiophenocarbazolyl, indolylcarbazolyl, azadibenzothiophenyl or azadibenzofuranyl; when the above structural formula has a substituent, the substituent is selected from one of deuterium, halogen, cyano, C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 alkoxy, C3-C10 heterocycloalkyl, C6-C60 aryl, and C3-C60 heteroaryl.

6. The composition for an organic electroluminescent device according to claim 2, characterized in that: The R1 and R2 are each independently selected from one of hydrogen, deuterium, C1-C10 chain alkyl, C1-C10 alkoxy, C3-C10 cycloalkyl, C6-C30 aryloxy, C6-C30 aryl, and C3-C30 heteroaryl; Preferably, R1 and R2 are each independently selected from phenyl, biphenyl or naphthyl; More preferably, said R1 and R2 are each independently selected from hydrogen.

7. The composition for an organic electroluminescent device according to claim 1, characterized in that: The compound of formula (I) is selected from the following compounds:

8. The composition for an organic electroluminescent device according to claim 1, characterized in that: The second compound has a structure as shown in formula (2-11) or (2-12): Among them, R 21 , R 22 , R 23 , R 24 The definition ranges of a, b, c, and d are the same as those in formula (2-1); Preferably, in formula (2-1) and formula (2-2), R 21 , R 22 , R 23 , R 24 Each is independently selected from hydrogen, deuterium, halogen, substituted or unsubstituted C1-C10 chain alkyl, substituted or unsubstituted C1-C10 alkoxy, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C6-C60 aryloxy, substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted C3-C60 heteroaryl, R 25 , R 26 , R 27 Two adjacent ones are not connected or connected to form a loop.

9. The composition for an organic electroluminescent device according to claim 8, characterized in that: The second compound has a structure as shown in any one of formula (2-21), (2-22) or (2-23): Among them, X2, R 25 , R 26 , R 27 The definition ranges of , e, f, and g are the same as those in formula (2-2); Preferably, formula (2-2) has a substituted or unsubstituted structure as shown in any one of formulas (2-2-1), (2-2-2), (2-2-3), (2-2-4), (2-2-5), and (2-2-6): In the above formulas (2-212)(2-222)(2-232)(2-242)(2-252)(2-262), X2 represents O or S; When the above structural formula has a substituent, the substituent is selected from one of deuterium, halogen, cyano, C1-C10 alkyl, C3-C10 cycloalkyl, C1-C10 alkoxy, C3-C10 heterocycloalkyl, C6-C60 aryl, and C3-C60 heteroaryl.

10. The composition for an organic electroluminescent device according to claim 1, characterized in that: The compound of formula (II) is selected from the following compounds:

11. An organic electroluminescent device, comprising a first electrode, a second electrode and one or more light-emitting functional layers inserted between the first electrode and the second electrode, wherein: The light-emitting functional layer comprises the composition for an organic electroluminescent device as claimed in claim 1.

12. The organic electroluminescent device according to claim 11, wherein: In the composition for an organic electroluminescent device, the total amount of the compound represented by formula (I) and the compound represented by formula (II) is set to 100%, and the mass percentage of the compound represented by formula (I) is 9%-66.7%; preferably, the mass percentage of the compound represented by formula (I) is 30%-66.7%, and further preferably, the mass percentage of the compound represented by formula (I) is 44%-60%.

13. The organic electroluminescent device according to claim 12, characterized in that: The mass percentage of the compound represented by formula (I) to the compound represented by formula (II) is 0.5-2.0:1, calculated as the content of the compound represented by formula (I): the content of the compound represented by formula (II).

14. The organic electroluminescent device according to claim 12, characterized in that: The light-emitting functional layer comprises a light-emitting layer, wherein the light-emitting layer contains a doping material in an amount of 1-10% by weight relative to the total amount of the compound represented by formula (I) and the compound represented by formula (II); Preferably, the doping material is a phosphorescent material.

15. The organic electroluminescent device according to claim 12, characterized in that: The thickness of the light-emitting layer in the light-emitting functional layer in the organic electroluminescent device is 10-60 nm, preferably 20-50 nm.

16. A host material for an organic electroluminescent device, comprising the composition according to claims 1 to 10.

17. Use of the composition according to any one of claims 1 to 10 as a functional material in an organic electronic device, wherein the organic electronic device comprises: Organic electroluminescent device, optical sensor, solar cell, lighting element, organic thin film transistor, organic field effect transistor, information tag, electronic artificial skin sheet, sheet-type scanner or electronic paper.

18. A display device comprising the organic electroluminescent device according to any one of claims 11 to 15.

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