An organic compound and a mixture, a composition and an organic electronic device comprising the same

Abstract

The present invention provides an organic compound and a mixture, a composition and an organic electronic device based thereon, and relates to the field of optoelectronic technology. The organic compound has a structure as shown in formula (I): The overall structure of the organic compound provided by the present invention has good conjugation and planarity, and when applied to a device, it can improve the luminous efficiency of the device and extend the service life of the device.

Description

Technical Field

[0001] The present invention relates to the field of optoelectronic technology, and in particular to an organic compound and a mixture, a composition and an organic electronic device comprising the organic compound. Background Art

[0002] Organic semiconductor materials have the characteristics of diversified synthesis, low manufacturing cost, and excellent optical and electrical properties. Organic electronic devices using organic semiconductor materials, such as flat panel displays, lighting devices, and organic light-emitting diodes (OLEDs), are widely used. In particular, OLEDs have the advantages of wide viewing angle, fast response time, low operating voltage, and thin panel thickness, and therefore have broad development prospects.

[0003] OLED is a current-type organic electroluminescent device that emits light through the injection and recombination of carriers, and the luminous intensity is proportional to the injected current. Compared with LCD displays, OLED displays are thin, light, bright, low power, fast response, high definition, good flexibility, and high luminous efficiency, which can meet consumers' new demands for display technology. Therefore, more and more display manufacturers around the world are investing in research and development, which has greatly promoted the industrialization process of OLED.

[0004] In order to improve the luminous efficiency of OLED devices, various fluorescent and phosphorescent luminescent material systems have been developed. Among them, OLEDs using fluorescent materials have the characteristics of high reliability, but under electrical excitation, the branching ratio between the singlet excited state and the triplet excited state based on the exciton is 1:3, so the internal electroluminescence quantum efficiency of fluorescent OLEDs is limited to 25%. OLED devices using phosphorescent materials have achieved an internal electroluminescence quantum efficiency of about 100%, but phosphorescent OLEDs have a major difficulty - the Roll-off effect, that is, the luminous efficiency decreases rapidly with the increase of current or brightness, which is particularly unfavorable for devices with high brightness requirements.

[0005] Traditional phosphorescent materials with practical use value are complexes containing iridium and platinum. However, these raw materials are rare and expensive, and the synthesis of the complexes is also complicated, so their cost is very high. In order to overcome the above problems, Adachi proposed the concept of reverse internal conversion, so that high efficiency comparable to that of phosphorescent OLEDs based on metal complexes can be achieved based on organic compounds. This concept has been proven to be achievable through certain materials, such as: 1) composite excited state materials; 2) thermally activated delayed fluorescence (TADF) materials.

[0006] Traditional TADF materials mainly use the method of connecting electron donor (Donor) groups with electron acceptor (Acceptor) groups to cause the electron cloud distribution of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) to be completely separated, narrowing the difference (△EST) between the singlet state (S1) and triplet state (T1) of organic compounds. However, compared with phosphorescent materials based on metal complexes, traditional TADF materials have lower efficiency and shorter life when used in OLEDs. Summary of the invention

[0007] The object of the present invention is to provide an organic compound, the overall structure of which has good conjugation and planarity, and when applied to a device, can improve the luminous efficiency of the device and extend the service life of the device.

[0008] Another object of the present invention is to provide a mixture, a composition and an organic electronic device.

[0009] The present invention solves the technical problem by adopting the following technical solutions:

[0010] An organic compound having a structure as shown in formula (I):

[0011]

[0012] in,

[0013] n1 is selected from 0, 1, 2 or 3; n2 is selected from 0, 1, 2 or 3; n3 is selected from 0, 1, 2 or 3;

[0014] R1, R2, and R3 are each independently selected from deuterium, straight-chain alkyl having 1 to 20 C atoms, straight-chain alkoxy having 1 to 20 C atoms, straight-chain thioalkoxy having 1 to 20 C atoms, branched-chain alkyl having 3 to 20 C atoms, branched-chain alkoxy having 3 to 20 C atoms, branched-chain thioalkoxy having 3 to 20 C atoms, cyclic alkyl having 3 to 20 C atoms, cyclic alkoxy having 3 to 20 C atoms, cyclic thioalkoxy having 3 to 20 C atoms, silyl, keto having 1 to 20 C atoms, alkoxycarbonyl having 2 to 20 C atoms, a combination of one or more of an aryloxycarbonyl group having 7 to 20 C atoms, a cyano group, a carbamoyl group, a haloformyl group, a formyl group, an isocyano group, an isocyanate group, a thiocyanate group, an isothiocyanate group, a hydroxyl group, a nitro group, a substituted or unsubstituted amine group, -CF3, -Cl, -Br, -F, -I, a substituted or unsubstituted alkenyl group having 2 to 20 C atoms, a substituted or unsubstituted aromatic group having 6 to 60 ring atoms, a substituted or unsubstituted heteroaromatic group having 5 to 60 ring atoms, a substituted or unsubstituted aryloxy group having 5 to 60 ring atoms, and a substituted or unsubstituted heteroaryloxy group having 5 to 60 ring atoms;

[0015] Adjacent R1s may or may not form a ring; adjacent R2s may or may not form a ring; adjacent R3s may or may not form a ring;

[0016] Ar1 and Ar2 are independently selected from a substituted or unsubstituted aromatic group having 6 to 60 C atoms, a substituted or unsubstituted heteroaromatic group having 5 to 60 ring atoms, or a substituted or unsubstituted non-aromatic ring group having 3 to 30 ring atoms.

[0017] The present invention also provides a mixture, comprising the above-mentioned organic compound and at least one organic functional material, wherein the organic functional material is selected from one of hole injection materials, hole transport materials, electron transport materials, electron injection materials, electron blocking materials, hole blocking materials, luminescent materials, host materials, and organic dyes.

[0018] The present invention also provides a composition, comprising the above organic compound or the above mixture, and at least one organic solvent.

[0019] The present invention also provides an organic electronic device, comprising at least one functional layer, wherein the functional layer comprises the above organic compound, or the functional layer comprises the above mixture, or the functional layer is prepared by the above composition.

[0020] Compared with the prior art, the present invention has the following beneficial effects: the organic compound provided by the present invention has better conjugation and planarity of the overall molecular structure by fusing the benzene ring and the six-membered ring, and at the same time, combined with the selection of each substituent, a boron-containing fused ring compound can be formed, thereby improving the rigidity and stability of the material itself. When the organic compound is applied to electronic devices, the luminous efficiency of the device can also be improved and the service life of the device can be extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the structure of an OLED device provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0024] The technical solution provided by the present invention will be described in detail in the following content. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments. In addition, in the description of the present invention, the term "including" means "including but not limited to". Various embodiments of the present invention may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a rigid limitation on the scope of the present invention; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within the range.

[0025] The terms "and / or", "or / and", and "and / or" used in the present invention include any one of two or more related listed items, and also include any and all combinations of related listed items, wherein the arbitrary and all combinations include any two related listed items, any more related listed items, or a combination of all related listed items. It should be noted that when at least three items are connected by at least two conjunctions selected from "and / or", "or / and", and "and / or", it should be understood that in the present application, the technical solution undoubtedly includes technical solutions that are all connected by "logical and", and undoubtedly includes technical solutions that are all connected by "logical or". For example, "A and / or B" includes three parallel solutions of A, B and A+B. For example, the technical solution of "A, and / or, B, and / or, C, and / or, D" includes any one of A, B, C, and D (that is, the technical solution that is all connected by "logical OR"), and also includes any and all combinations of A, B, C, and D, that is, the combination of any two or any three of A, B, C, and D, and also includes the combination of four of A, B, C, and D (that is, the technical solution that is all connected by "logical AND").

[0026] The "combinations thereof", "any combinations thereof", "any combinations thereof", "combinations" and the like used in the present invention include all suitable combinations of any two or more items in the listed groups.

[0027] It should be noted that, in the present invention, aromatic group, aromatic series and aromatic ring system have the same meaning and can be used interchangeably.

[0028] In the present invention, heteroaromatic group, heteroaromatic series and heteroaromatic ring system have the same meaning and can be interchanged.

[0029] In the present invention, "substituted" means that one or more hydrogen atoms in a substituted group are replaced by a substituent.

[0030] In the present invention, when the same substituent appears multiple times, it can be independently selected from different groups. If the general formula contains multiple R, then R can be independently selected from different groups.

[0031] In the present invention, "substituted or unsubstituted" means that the defined group may be substituted or unsubstituted. When the defined group is substituted, it should be understood that the defined group may be substituted by one or more substituents R, wherein R is selected from but not limited to: deuterium atom, cyano, isocyano, nitro, halogen, alkyl containing 1 to 20 C atoms, heterocyclic group containing 3 to 20 ring atoms, aromatic group containing 6 to 20 ring atoms, heteroaromatic group containing 5 to 20 ring atoms, -NR'R", silane, carbonyl, alkoxycarbonyl, aryloxycarbonyl, carbamoyl, haloformyl, formyl, isocyanate, thiocyanate, isothiocyanate, hydroxyl, trifluoromethyl, and the above groups may be further substituted by substituents acceptable in the art; it is understandable that R' and R" in -NR'R" are independently selected from but not limited to: H, deuterium atom, , cyano, isocyano, nitro, halogen, alkyl containing 1 to 10 C atoms, heterocyclic group containing 3 to 20 ring atoms, aromatic group containing 6 to 20 ring atoms, heteroaromatic group containing 5 to 20 ring atoms. Preferably, R is selected from but not limited to: deuterium atom, cyano, isocyano, nitro, halogen, alkyl containing 1 to 10 C atoms, heterocyclic group containing 3 to 10 ring atoms, aromatic group containing 6 to 20 ring atoms, heteroaromatic group containing 5 to 20 ring atoms, silane group, carbonyl group, alkoxycarbonyl group, aryloxycarbonyl group, carbamoyl group, haloformyl group, formyl group, isocyanate group, thiocyanate group, isothiocyanate group, hydroxyl group, trifluoromethyl group, and the above groups may also be further substituted by substituents acceptable in the art.

[0032] In the present invention, the "number of ring atoms" refers to the number of atoms constituting the ring itself of a structural compound (e.g., a monocyclic compound, a condensed ring compound, a cross-linked compound, a carbocyclic compound, a heterocyclic compound) in which atoms are bonded to form a ring. For example, the number of ring atoms of a benzene ring is 6, the number of ring atoms of a naphthalene ring is 10, and the number of ring atoms of a thienyl group is 5. When the ring is substituted with a substituent, the atoms contained in the substituent are not included in the ring atoms. The "number of ring atoms" described below has the same meaning unless otherwise specified.

[0033] In the present invention, "aryl or aromatic group" refers to an aromatic hydrocarbon group derived from an aromatic ring compound by removing a hydrogen atom, which can be a monocyclic aromatic group, a condensed aromatic group, or a polycyclic aromatic group. For polycyclic rings, at least one is an aromatic ring system. For example, "substituted or unsubstituted aromatic group having 6 to 40 ring atoms" refers to an aromatic group containing 6 to 40 ring atoms, preferably a substituted or unsubstituted aromatic group having 6 to 30 ring atoms, more preferably a substituted or unsubstituted aromatic group having 6 to 18 ring atoms, and particularly preferably a substituted or unsubstituted aromatic group having 6 to 14 ring atoms, and the aromatic group is optionally further substituted; suitable examples include, but are not limited to: phenyl, biphenyl, terphenyl, naphthyl, anthracenyl, phenanthrenyl, fluoranthenyl, triphenylene, pyrenyl, perylene, naphthyl, fluorenyl, dinaphthylenyl, acenaphthene and derivatives thereof. It is understood that multiple aromatic groups may also be interrupted by short non-aromatic units (e.g. <10% non-H atoms - such as C, N or O atoms), specifically acenaphthene, fluorene, or 9,9-diarylfluorene, triarylamine, diaryl ether systems should also be included in the definition of aromatic groups.

[0034] In the present invention, "heteroaryl or heteroaromatic group" means that at least one carbon atom is replaced by a non-carbon atom on the basis of an aryl group, and the non-carbon atom may be an N atom, an O atom, an S atom, etc. For example, "substituted or unsubstituted heteroaryl having 5 to 40 ring atoms" means a heteroaryl having 5 to 40 ring atoms, preferably a substituted or unsubstituted heteroaryl having 6 to 30 ring atoms, more preferably a substituted or unsubstituted heteroaryl having 6 to 18 ring atoms, and particularly preferably a substituted or unsubstituted heteroaryl having 6 to 14 ring atoms, and the heteroaryl group is optionally further substituted, and suitable examples include but are not limited to: thienyl, furanyl, pyrrolyl, imidazolyl, oxadiazolyl, triazolyl, imidazolyl, pyridyl, bipyridyl, pyrimidine yl, triazine, acridinyl, pyridazinyl, pyrazinyl, quinolyl, isoquinolyl, quinazolinyl, quinoxalinyl, phthalazinyl, pyridopyrimidinyl, pyridopyrazinyl, benzothienyl, benzofuranyl, indolyl, pyrroloimidazolyl, pyrrolopyrrolyl, thienopyrrolyl, thienothiphenyl, furopyrrolyl, furofuranyl, thienofuranyl, benzisoxazolyl, benzisothiazolyl, benzimidazolyl, o-naphthyl, phenanthridinyl, primary pyridyl, quinazolinone, dibenzothienyl, dibenzofuranyl, carbazolyl and derivatives thereof.

[0035] In the present invention, "alkyl" may represent a straight chain, branched chain and / or cyclic alkyl. The number of carbon atoms in the alkyl group may be limited according to the situation, for example, 1 to 50, 1 to 30, 1 to 20, 1 to 10, 1 to 6. 1-9The phrase "alkyl" refers to an alkyl group containing 1 to 9 carbon atoms, and each occurrence can be independently, for example, C1 alkyl, C2 alkyl, C3 alkyl, C4 alkyl, C5 alkyl, C6 alkyl, C7 alkyl, C8 alkyl, C9 alkyl. Non-limiting examples of alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, isobutyl, 2-ethylbutyl, 3,3-dimethylbutyl, n-pentyl, isopentyl, pentyl, neopentyl, tert-pentyl, cyclopentyl, 1-methylpentyl, 3-methylpentyl, 2-ethylpentyl, 4-methyl-2-pentyl, n-hexyl, 1-methylhexyl, 2-ethylhexyl, 2-butylhexyl, cyclohexyl, 4-methylcyclohexyl, 4-tert-butylcyclohexyl, n-heptyl, 1-methylheptyl, 2,2-dimethylheptyl, 2-ethylheptyl, 2-butylheptyl, n-octyl, tert-octyl, 2-ethyloctyl, 2-butyloctyl, 2-hexyl 2-Hexyldecyl, 2-octyldecyl, 2-undecyl, 2-ethyldecyl, 2-butyldecyl, 2-hexyldecyl, 2-octyldecyl, 2-undecyl, 2-ethyldodecyl, 2-butyldodecyl, 2-hexyldodecyl, 2-octyldodecyl, 2-tridecyl, 2-tetradecyl, 2-pentadecyl, 2-hexadecyl, 2-ethylhexadecyl, 2-butylhexadecyl, 2-hexylhexadecyl, 2-octylhexadecyl, 2-heptadecyl, 2-octylhexa ...

[0036] In the present invention, the abbreviations of substituents correspond to: n-normal, sec-secondary, i-iso, t-tertiary, o-ortho, m-meta, p-para, Me methyl, Et ethyl, Pr propyl, Bu butyl, Am n-pentyl, Hx hexyl, Cy cyclohexyl.

[0037] In the present invention, "amino group" refers to an amine derivative having a structural feature of the formula -N(X)2, wherein each "X" is independently H, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted heterocyclyl, etc. Non-limiting types of amine groups include -NH2, -N(alkyl)2, -NH(alkyl), -N(cycloalkyl)2, -NH(cycloalkyl), -N(heterocyclyl), -NH(heterocyclyl), -N(aryl), -NH(aryl), -N(alkyl)(aryl), -N(alkyl)(heterocyclyl), -N(cycloalkyl)(heterocyclyl), -N(aryl)(heteroaryl), -N(alkyl)(heteroaryl), etc.

[0038] In the present invention, unless otherwise defined, a hydroxyl group refers to -OH, a carboxyl group refers to -COOH, a carbonyl group refers to -C(=O)-, an amino group refers to -NH2, a formyl group refers to -C(=O)H, a haloformyl group refers to -C(=O)Z (wherein Z represents a halogen), a carbamoyl group refers to -C(=O)NH2, an isocyanate group refers to -NCO, and an isothiocyanate group refers to -NCS.

[0039] In the present invention, the term "alkoxy" refers to a group having a structure of "-O-alkyl", i.e., an alkyl group as defined above is connected to other groups via an oxygen atom. Phrases containing the term, suitable examples include, but are not limited to, methoxy (-O-CH3 or -OMe), ethoxy (-O-CH2CH3 or -OEt) and tert-butoxy (-OC(CH3)3 or -OtBu).

[0040] In the present invention, "*" connected to a single bond indicates a connection or fusion site.

[0041] In the present invention, when a linking site is not specified in a group, it means that any linking site in the group can be used as the linking site.

[0042] In the present invention, when the fusion site is not specified in the group, it means that any fusion site in the group can be used as the fusion site, and preferably two or more sites in the ortho position in the group are used as the fusion site.

[0043] In the present invention, when a group contains multiple substituents with the same symbol, the substituents may be the same or different from each other. The six Rs on the benzene ring may be the same as or different from each other.

[0044] In the present invention, the single bond connecting the substituent runs through the corresponding ring, indicating that the substituent can be connected to any position of the ring, for example It can mean that R is connected to any substitutable position of the benzene ring; express Can be used with The above optional substitutable positions form a ring.

[0045] A non-aromatic ring system refers to a ring system containing at least one non-aromatic ring. In the present application, preferably, the non-aromatic ring system contains a ring formed by a carbon-carbon single bond, such as the non-aromatic ring system contains a cycloalkyl group with 3 to 8 carbon atoms; further, the non-aromatic ring system contains a cyclopentyl group or a cyclohexyl group.

[0046] In the present invention, "adjacent groups" means that there is no substitutable site between two substituents.

[0047] In the present invention, "adjacent R mutually forms a ring" means a ring system formed by two or more adjacent R mutually connected, and the ring system can be selected from aliphatic hydrocarbon rings, aliphatic heterocycles, aromatic hydrocarbon rings or aromatic heterocycles. Preferably, a substituted or unsubstituted aromatic group or heteroaromatic group having 5 to 10 ring atoms can be formed; more preferably, a substituted or unsubstituted aromatic group or heteroaromatic group having 6 ring atoms is formed.

[0048] In the present invention, “further”, “furthermore”, “particularly”, etc. are used for descriptive purposes to indicate differences in content, but should not be construed as limiting the scope of protection of the present invention.

[0049] In the present invention, "optionally", "optional", and "optional" mean optional, that is, any one of the two parallel solutions of "yes" or "no". If multiple "options" appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" is independent.

[0050] An embodiment of the present invention provides an organic compound, which is a boron-containing tetrahydroquinoxaline organic compound having a structure as shown in formula (I):

[0051]

[0052] in,

[0053] n1 is selected from 0, 1, 2 or 3; n2 is selected from 0, 1, 2 or 3; n3 is selected from 0, 1, 2 or 3;

[0054] R1, R2, and R3 are each independently selected from deuterium, straight-chain alkyl having 1 to 20 C atoms, straight-chain alkoxy having 1 to 20 C atoms, straight-chain thioalkoxy having 1 to 20 C atoms, branched-chain alkyl having 3 to 20 C atoms, branched-chain alkoxy having 3 to 20 C atoms, branched-chain thioalkoxy having 3 to 20 C atoms, cyclic alkyl having 3 to 20 C atoms, cyclic alkoxy having 3 to 20 C atoms, cyclic thioalkoxy having 3 to 20 C atoms, silyl, keto having 1 to 20 C atoms, alkoxycarbonyl having 2 to 20 C atoms, a combination of one or more of an aryloxycarbonyl group having 7 to 20 C atoms, a cyano group, a carbamoyl group, a haloformyl group, a formyl group, an isocyano group, an isocyanate group, a thiocyanate group, an isothiocyanate group, a hydroxyl group, a nitro group, a substituted or unsubstituted amine group, -CF3, -Cl, -Br, -F, -I, a substituted or unsubstituted alkenyl group having 2 to 20 C atoms, a substituted or unsubstituted aromatic group having 6 to 60 ring atoms, a substituted or unsubstituted heteroaromatic group having 5 to 60 ring atoms, a substituted or unsubstituted aryloxy group having 5 to 60 ring atoms, and a substituted or unsubstituted heteroaryloxy group having 5 to 60 ring atoms;

[0055] Adjacent R1s may or may not form a ring; adjacent R2s may or may not form a ring; adjacent R3s may or may not form a ring;

[0056] Ar1 and Ar2 are independently selected from a substituted or unsubstituted aromatic group having 6 to 60 C atoms, a substituted or unsubstituted heteroaromatic group having 5 to 60 ring atoms, or a substituted or unsubstituted non-aromatic ring group having 3 to 30 ring atoms.

[0057] Furthermore, formula (I) can be selected from one of the structures shown in formula (II-1), formula (II-2), formula (II-3), and formula (II-4):

[0058]

[0059] In some embodiments, n1 is selected from 0 or 1; and / or n2 is selected from 0 or 1.

[0060] Wherein, formula (II-1) can be selected from one of the structures shown in formula (III-1), formula (III-2), and formula (III-3):

[0061]

[0062] Formula (II-2) can be selected from one of the structures shown in formula (III-4), formula (III-5), and formula (III-6):

[0063]

[0064] Formula (II-3) can be selected from one of the structures shown in formula (III-7) and formula (III-8):

[0065]

[0066] Formula (II-4) can be selected from one of the structures shown in formula (III-9) and formula (III-10):

[0067]

[0068] In some embodiments, each occurrence of R1, R2, and R3 is independently selected from deuterium, a linear alkyl group having 1 to 10 C atoms, a linear alkoxy group having 1 to 10 C atoms, a linear thioalkoxy group having 1 to 10 C atoms, a branched alkyl group having 3 to 10 C atoms, a branched alkoxy group having 3 to 10 C atoms, a branched thioalkoxy group having 3 to 10 C atoms, a cyclic alkyl group having 3 to 10 C atoms, a cyclic alkoxy group having 3 to 10 C atoms, a cyclic thioalkoxy group having 3 to 10 C atoms, a silyl group, a keto group having 1 to 10 C atoms, an alkoxy group having 2 to 10 C atoms, A combination of one or more of a carbonyl group, an aryloxycarbonyl group having 7 to 10 C atoms, a cyano group, a carbamoyl group, a haloformyl group, a formyl group, an isocyano group, an isocyanate group, a thiocyanate group, an isothiocyanate group, a hydroxyl group, a nitro group, a substituted or unsubstituted amine group, -CF3, -Cl, -Br, -F, -I, a substituted or unsubstituted alkenyl group having 2 to 10 C atoms, a substituted or unsubstituted aromatic group having 6 to 30 ring atoms, a substituted or unsubstituted heteroaromatic group having 5 to 30 ring atoms, a substituted or unsubstituted aryloxy group having 5 to 30 ring atoms, and a substituted or unsubstituted heteroaryloxy group having 5 to 30 ring atoms.

[0069] Further, each occurrence of R1, R2, and R3 is independently selected from deuterium, a straight-chain alkyl group having 1 to 8 C atoms, a branched-chain alkyl group having 3 to 8 C atoms, a cyclic alkyl group having 3 to 8 C atoms, a silyl group, A combination of one or more groups of an aromatic group having 6 to 30 ring atoms which is substituted or unsubstituted by R0, and a heteroaromatic group having 5 to 30 ring atoms which is substituted or unsubstituted by R0;

[0070] wherein R4 and R5, when they appear each time, are independently selected from a straight-chain alkyl group having 1 to 8 C atoms, or a branched-chain alkyl group having 3 to 8 C atoms, or a cyclic alkyl group having 3 to 8 C atoms, or an aromatic group having 6 to 20 ring atoms which is substituted or unsubstituted by R0, or a heteroaromatic group having 5 to 20 ring atoms which is substituted or unsubstituted by R0, or a combination of these groups;

[0071] Each occurrence of R0 is independently selected from a combination of one or more groups selected from deuterium, a straight-chain alkyl group having 1 to 10 C atoms, a branched-chain alkyl group having 3 to 10 C atoms, a cyclic alkyl group having 3 to 10 C atoms, a silyl group, an aromatic group having 6 to 10 ring atoms, and a heteroaromatic group having 6 to 13 ring atoms; R0 is monosubstituted or polysubstituted;

[0072] Wherein, “*” indicates the connection site.

[0073] In some embodiments, each occurrence of R1 and R2 is independently selected from one of deuterium, a straight chain alkyl group having 1 to 8 C atoms, a branched chain alkyl group having 3 to 8 C atoms, and a cyclic alkyl group having 3 to 8 C atoms.

[0074] Furthermore, each time R1 and R2 appear, they are independently selected from methyl, ethyl, iPr, tBu, or tAm. iPr is isopropyl; tBu is tert-butyl; and tAm is tert-amyl.

[0075] In some embodiments, each occurrence of R3 is independently selected from a linear alkyl group having 1 to 8 C atoms, a branched alkyl group having 3 to 8 C atoms, a cyclic alkyl group having 3 to 8 C atoms, (R4 and R5 have the same meanings as those of R4 and R5 above), a group as represented by formula (A-1), a group as represented by formula (A-2), or a combination of one or more groups selected from the group as represented by formula (A-3);

[0076]

[0077] in:

[0078] Y is selected from CR6R7, NR8, O or S;

[0079] R6, R7, and R8, when they occur, are each independently selected from -H, -D, or a straight-chain alkyl group having 1 to 10 C atoms, a straight-chain alkoxy group having 1 to 10 C atoms, or a straight-chain thioalkoxy group having 1 to 10 C atoms, or a branched-chain alkyl group having 3 to 10 C atoms, or a branched-chain alkoxy group having 3 to 10 C atoms, or a branched-chain thioalkoxy group having 3 to 10 C atoms, or a cyclic alkyl group having 3 to 10 C atoms, or a cyclic alkoxy group having 3 to 10 C atoms, or a cyclic thioalkoxy group having 3 to 10 C atoms, or a silyl group, or a keto group having 1 to 10 C atoms, or an alkoxy group having 2 to 10 C atoms. alkylcarbonyl, or aryloxycarbonyl having 7 to 10 C atoms, cyano, carbamoyl, haloformyl, formyl, isocyano, isocyanate, thiocyanate, or isothiocyanate, hydroxy, nitro, substituted or unsubstituted amine, -CF3, -Cl, -Br, -F, -I, or substituted or unsubstituted alkenyl having 2 to 10 C atoms, or substituted or unsubstituted aromatic radicals having 6 to 30 ring atoms, or substituted or unsubstituted heteroaromatic radicals having 5 to 20 ring atoms, or substituted or unsubstituted aryloxy radicals having 5 to 20 ring atoms, or substituted or unsubstituted heteroaryloxy radicals having 5 to 20 ring atoms, or combinations of these groups;

[0080] m1 is selected from 0, 1, 2, 3 or 4; m2 is selected from 0, 1, 2 or 3; m3 is selected from 0, 1, 2, 3, 4 or 5;

[0081] The meaning of R0 is the same as the above-mentioned R0.

[0082] In some embodiments, each occurrence of R6, R7, and R8 is independently selected from -H, -D, a straight chain alkyl group having 1 to 4 C atoms, or a branched chain alkyl group having 3 to 4 C atoms, or a cyclic alkyl group having 3 to 4 C atoms, or a substituted or unsubstituted aromatic group having 6 to 10 ring atoms, or a substituted or unsubstituted heteroaromatic group having 6 to 10 ring atoms, or a combination of these groups.

[0083] In some embodiments, the Selected from the following groups:

[0084]

[0085] wherein: m4 is selected from 0, 1, 2, 3, 4 or 5; m5 is selected from 0, 1, 2, 3, 4, 5, 6 or 7; m6 is selected from 0, 1, 2, 3 or 4; m7 is selected from 0, 1, 2, 3, 4, 5, 6, 7, 8 or 9.

[0086] In some embodiments, each occurrence of R0 as referred to above is independently selected from -D, methyl, ethyl, iPr, tBu, tAm, phenyl, biphenyl, naphthyl, phenanthrenyl, pyridinyl, pyrimidinyl, or phenyl substituted with alkyl having 1 to 6 C atoms.

[0087] In some embodiments, each occurrence of R3 is independently selected from methyl, ethyl, iPr, tBu, tAm, or the following groups:

[0088]

[0089]

[0090] In some embodiments, multiple occurrences of R3 are selected from the same group.

[0091] In some embodiments, Ar1 and Ar2 are independently selected from a substituted or unsubstituted aromatic group containing 6 to 30 C atoms, a substituted or unsubstituted heteroaromatic group containing 5 to 30 ring atoms, and a non-aromatic ring group containing 3 to 12 ring atoms.

[0092] In some embodiments, Ar1 and Ar2 are independently selected from a substituted or unsubstituted aromatic group containing 6 to 13 C atoms, a substituted or unsubstituted heteroaromatic group containing 5 to 13 ring atoms, and a non-aromatic ring group containing 9 to 10 ring atoms.

[0093] In some embodiments, Ar1 and Ar2 are independently selected from any one of the structures shown in Formula (B-1) to Formula (B-9):

[0094]

[0095] wherein X, at each occurrence, is independently selected from CR9 or N;

[0096] Each time W appears, it is independently selected from NR 10 , CR 11 R 12 、SiR 11 R 12 , O, S, S=O or SO2;

[0097] R9, R 10 , R 11 , R 12Each occurrence is independently selected from hydrogen, deuterium, straight-chain alkyl having 1 to 20 C atoms, straight-chain alkoxy having 1 to 20 C atoms, straight-chain thioalkoxy having 1 to 20 C atoms, branched-chain alkyl having 3 to 20 C atoms, branched-chain alkoxy having 3 to 20 C atoms, branched-chain thioalkoxy having 3 to 20 C atoms, cyclic alkyl having 3 to 20 C atoms, cyclic alkoxy having 3 to 20 C atoms, cyclic thioalkoxy having 3 to 20 C atoms, silyl, keto having 1 to 20 C atoms, alkoxycarbonyl having 2 to 20 C atoms, alkyl having 7 to 20 C atoms, alkyl having 1 to 20 C atoms, alkyl having 1 to 20 C atoms, alkyl having 2 ... a substituted or unsubstituted alkenyl group having 2 to 20 C atoms, a substituted or unsubstituted aromatic group having 6 to 30 ring atoms, a substituted or unsubstituted heteroaromatic group having 5 to 30 ring atoms, a substituted or unsubstituted aryloxy group having 5 to 30 ring atoms, and a combination of one or more of the following groups: an aryloxycarbonyl group having 20 to 20 C atoms, a cyano group, a carbamoyl group, a haloformyl group, a formyl group, an isocyano group, an isocyanate group, a thiocyanate group, an isothiocyanate group, a hydroxyl group, a nitro group, a substituted or unsubstituted amine group, -CF3, -Cl, -Br, -F, -I, a substituted or unsubstituted alkenyl group having 2 to 20 C atoms, a substituted or unsubstituted aromatic group having 6 to 30 ring atoms, a substituted or unsubstituted heteroaromatic group having 5 to 30 ring atoms, a substituted or unsubstituted aryloxy group having 5 to 30 ring atoms, and a substituted or unsubstituted heteroaryloxy group having 5 to 30 ring atoms.

[0098] When X is the attachment site, X is selected from C atoms; when W is the attachment site, W is selected from N atoms.

[0099] In some embodiments, Ar1 and Ar2 are independently selected from the following groups:

[0100]

[0101] Further, each occurrence of R9 is independently selected from hydrogen, deuterium, or a straight-chain alkyl group having 1 to 6 C atoms, or a branched-chain alkyl group having 3 to 6 C atoms, or a cyclic alkyl group having 3 to 6 C atoms, or an aromatic group having 6 to 10 ring atoms which is unsubstituted or substituted by R0, or a heteroaromatic group having 6 to 10 ring atoms which is unsubstituted or substituted by R0, or a combination of these groups.

[0102] In some embodiments, Ar1 and Ar2 are independently selected from the following groups:

[0103]

[0104]

[0105] In addition, Ph represents a phenyl group.

[0106] In one embodiment, Ar1 and Ar2 are selected from the same group.

[0107] In some embodiments, the boron-containing tetrahydroquinoxaline organic compound provided by the present invention can be selected from but not limited to the following structures:

[0108]

[0109]

[0110]

[0111]

[0112]

[0113]

[0114]

[0115] It is understood that the -H in the structural formula of the above boron-containing tetrahydroquinoxaline organic compound may be further substituted.

[0116] In some embodiments, the boron-containing tetrahydroquinoxaline organic compound provided by the present invention can be used as a functional material in electronic devices, especially in OLED devices. The functional material can be, but is not limited to, a hole injection material (HIM), a hole transport material (HTM), an electron transport material (ETM), an electron injection material (EIM), an electron blocking material (EBM), a hole blocking material (HBM), an emitter material, a host material, and an organic dye.

[0117] In the present invention, the luminescent material refers to the guest material of the luminescent layer, and the host material refers to the host material of the luminescent layer.

[0118] In some embodiments, the organic compound can be applied to the light-emitting layer of the electronic device, preferably, it can be applied to the light-emitting layer as a guest material of the light-emitting layer. It is particularly suitable as a blue light guest material, and by combining with a suitable host material, the light-emitting efficiency and life of the electroluminescent device can be improved.

[0119] The embodiment of the present invention further provides a mixture, comprising the above-mentioned organic compound and at least one organic functional material, wherein the organic functional material is selected from one of hole injection material, hole transport material, electron transport material, electron injection material, electron blocking material, hole blocking material, luminescent material, host material, and organic dye. Among them, the luminescent material can be selected from one or more of singlet luminescent material (fluorescent luminescent body) material, triplet luminescent body (phosphorescent luminescent body) material, and organic thermally excited delayed fluorescence (TADF) material. Here, at least one organic functional material may also be referred to as "another organic functional material", and the other organic functional material can refer to the detailed description in, for example, WO2010135519A1, US20090134784A1 and WO2011110277A1 patents, and the entire contents of the three patent documents are incorporated herein by reference.

[0120] In the present invention, the additional organic functional material may be a small molecule compound or a polymer material; preferably a small molecule compound.

[0121] In some embodiments, the additional organic functional material may be selected from a host material. Further, the additional organic functional material may be selected from a blue light host material.

[0122] The embodiment of the present invention further provides a composition, comprising the above organic compound or the above mixture, and at least one organic solvent. The organic compound or the above mixture may also be referred to as a solute in the composition.

[0123] In this embodiment, the composition may also be referred to as ink.

[0124] In terms of printing technology, the viscosity and surface tension of the ink are important parameters. Inks with appropriate surface tension are suitable for specific substrates and specific printing methods.

[0125] In some embodiments, the surface tension of the ink (composition) provided by the present invention at room temperature or 25° C. is about 19 to 50 dyne / cm, preferably 22 to 35 dyne / cm, and more preferably 25 to 33 dyne / cm.

[0126] In some embodiments, the viscosity of the ink (composition) provided by the present invention at room temperature or 25° C. is about 1 to 100 cps, preferably 1 to 50 cps, more preferably 1.5 to 20 cps, and particularly preferably 4.0 to 20 cps. The ink prepared in this way is conducive to inkjet printing.

[0127] When adjusting the viscosity, different methods can be used, such as selecting a suitable organic solvent and adjusting the concentration of the solute. The ink provided by the present invention comprising an organic compound or a mixture can be used by the user to adjust the viscosity within an appropriate range according to the printing method used. In the ink (composition) provided by the present invention, the weight ratio of the solute can be 0.3 to 30wt%, preferably 0.5 to 20wt%, more preferably 0.5 to 15wt%, particularly preferably 0.5 to 10wt%, and more particularly preferably 1 to 5wt%.

[0128] In some embodiments, the organic solvent is selected from one or more of aromatic or heteroaromatic based solvents, aromatic ketone based solvents, aromatic ether based solvents, aliphatic ketones, aliphatic ethers, ester based solvents, alicyclic compounds, olefin compounds, borate ester compounds, and phosphate ester compounds. Preferably, the organic solvent is selected from aromatic or heteroaromatic based solvents.

[0129] The aromatic or heteroaromatic based solvents may be selected from, but are not limited to: p-diisopropylbenzene, pentylbenzene, tetralin, cyclohexylbenzene, chloronaphthalene, 1,4-dimethylnaphthalene, 3-isopropylbiphenyl, p-methylisopropylbenzene, dipentylbenzene, tripentylbenzene, pentyltoluene, o-diethylbenzene, m-diethylbenzene, p-diethylbenzene, 1,2,3,4-tetramethylbenzene, 1,2,3,5-tetramethylbenzene, 1,2,4,5-tetramethylbenzene, butylbenzene, dodecylbenzene, dihexylbenzene, dibutylbenzene, p-diisopropylbenzene, cyclohexylbenzene, benzylbutylbenzene, dimethylnaphthalene, 3-isopropylbiphenyl, Propylbiphenyl, p-methylisopropylbenzene, 1-methylnaphthalene, 1,2,4-trichlorobenzene, 4,4-difluorodiphenylmethane, 1,2-dimethoxy-4-(1-propenyl)benzene, diphenylmethane, 2-phenylpyridine, 3-phenylpyridine, N-methyldiphenylamine, 4-isopropylbiphenyl, α,α-dichlorodiphenylmethane, 4-(3-phenylpropyl)pyridine, benzyl benzoate, 1,1-bis(3,4-dimethylphenyl)ethane, 2-isopropylnaphthalene, quinoline, isoquinoline, methyl 2-furoate, ethyl 2-furoate.

[0130] Aromatic ketone-based solvents may be selected from, but not limited to, 1-tetralone, 2-tetralone, 2-(phenylepoxy)tetralone, 6-(methoxy)tetralone, acetophenone, propiophenone, benzophenone, and derivatives thereof. Derivatives thereof may be selected from, but not limited to, 4-methylacetophenone, 3-methylacetophenone, 2-methylacetophenone, 4-methylpropiophenone, 3-methylpropiophenone, and 2-methylpropiophenone.

[0131] Aromatic ether-based solvents may be selected from, but are not limited to, 3-phenoxytoluene, butoxybenzene, p-anisaldehyde dimethyl acetal, tetrahydro-2-phenoxy-2H-pyran, 1,2-dimethoxy-4-(1-propenyl)benzene, 1,4-benzodioxane, 1,3-dipropylbenzene, 2,5-dimethoxytoluene, 4-ethyl ethyl ether, 1,3-dipropoxybenzene, 1,2,4-trimethoxybenzene, 4-(1-propenyl)-1,2-dimethoxybenzene, 1,3-dimethoxybenzene, glycidyl phenyl ether, dibenzyl ether, 4-tert-butylanisole, trans-p-propenylanisole, 1,2-dimethoxybenzene, 1-methoxynaphthalene, diphenyl ether, 2-phenoxymethyl ether, 2-phenoxytetrahydrofuran, and ethyl-2-naphthyl ether.

[0132] The aliphatic ketone may be selected from, but not limited to, 2-nonanone, 3-nonanone, 5-nonanone, 2-decanone, 2,5-hexanedione, 2,6,8-trimethyl-4-nonanone, fenchone, phorone, isophorone, di-n-amyl ketone.

[0133] The aliphatic ether may be selected from, but is not limited to, amyl ether, hexyl ether, dioctyl ether, ethylene glycol dibutyl ether, diethylene glycol diethyl ether, diethylene glycol butyl methyl ether, diethylene glycol dibutyl ether, triethylene glycol dimethyl ether, triethylene glycol ethyl methyl ether, triethylene glycol butyl methyl ether, tripropylene glycol dimethyl ether, and tetraethylene glycol dimethyl ether.

[0134] The ester-based solvent can be selected from, but not limited to, one or more of alkyl octanoate, alkyl sebacate, alkyl stearate, alkyl benzoate, alkyl phenylacetate, alkyl cinnamate, alkyl oxalate, alkyl maleate, alkyl lactone, and alkyl oleate. Preferably, the ester-based solvent is selected from octyl octanoate, diethyl sebacate, diallyl phthalate, and isononyl isononanoate.

[0135] It is understood that the above-mentioned solvents can be used alone or as a mixed solvent of two or more organic solvents.

[0136] In some embodiments, the composition provided by the present invention may further comprise another organic solvent in addition to the above-mentioned organic compound or mixture and organic solvent.

[0137] In some embodiments, examples of additional organic solvents include, but are not limited to, a combination of one or more of methanol, ethanol, 2-methoxyethanol, dichloromethane, chloroform, chlorobenzene, o-dichlorobenzene, tetrahydrofuran, anisole, morpholine, toluene, o-xylene, m-xylene, p-xylene, 1,4-dioxane, acetone, methyl ethyl ketone, 1,2-dichloroethane, 3-phenoxytoluene, 1,1,1-trichloroethane, 1,1,2,2-tetrachloroethane, ethyl acetate, butyl acetate, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, tetralin, decalin, and indene.

[0138] In some embodiments, organic solvents particularly suitable for the present invention are solvents having a Hansen solubility parameter in the following ranges:

[0139] δd (dispersion force) is 17.0~23.2MPa 1 / 2 , preferably 18.5 to 21.0 MPa 1 / 2 ;

[0140] δp (polar force) is 0.2~12.5MPa 1 / 2 , preferably 2.0~6.0MPa 1 / 2 ;

[0141] δh (hydrogen bonding force) is 0.9~14.2MPa 1 / 2 , preferably 2.0~6.0MPa 1 / 2 .

[0142] The composition provided by the present invention, wherein the boiling point parameter of the organic solvent should be considered when selecting. In the present invention, the boiling point of the organic solvent is ≥150°C; preferably ≥180°C; more preferably ≥200°C; more preferably ≥250°C; particularly preferably ≥275°C or ≥300°C. Such boiling point condition selection is beneficial for preventing the nozzle of the inkjet print head from being blocked. In the process of forming the film, the organic solvent can evaporate from the solution system to form a film containing the functional material.

[0143] In some embodiments, the composition (ink) provided by the embodiments of the present invention may be in a solution state.

[0144] In some embodiments, the composition (ink) provided by the embodiments of the present invention may be in a suspension state.

[0145] The present invention also provides the use of the above composition in organic electronic devices, which can be used as printing ink or coating in the preparation of organic electronic devices, especially in the preparation of organic electronic devices by printing or coating process.

[0146] Among them, suitable printing or coating techniques include, but are not limited to: inkjet printing, nozzle printing, letterpress printing, screen printing, dip coating, spin coating, doctor blade coating, roller printing, twist roller printing, lithography, flexographic printing, rotary printing, spraying, brushing or pad printing, slot extrusion coating, etc. Gravure printing, nozzle printing and inkjet printing are preferred.

[0147] When the composition is in a solution or suspension state, the composition may also include one or more auxiliary materials during the application process, such as surfactant compounds, lubricants, wetting agents, dispersants, hydrophobic agents, adhesives, etc., to adjust viscosity, film-forming properties, improve adhesion, etc.

[0148] The present invention provides application of the organic compound, mixture or composition in organic electronic devices.

[0149] Specifically, the present invention also provides an organic electronic device, comprising at least one functional layer, wherein the functional layer comprises the above organic compound, or the functional layer comprises the above mixture, or the functional layer is prepared by the above composition.

[0150] Furthermore, the organic electronic device may include a cathode, an anode and at least one functional layer, the functional layer includes the above-mentioned organic compound, or the functional layer includes the above-mentioned mixture, or the functional layer is prepared by the above-mentioned composition. In the present invention, the functional layer is selected from a hole injection layer (HIL), a hole transport layer (HTL), a light-emitting layer (EML), an electron blocking layer (EBL), an electron injection layer (EIL), an electron transport layer (ETL), and a hole blocking layer (HBL). Preferably, the functional layer is a light-emitting layer.

[0151] Organic electronic devices may include but are not limited to: organic light emitting diodes (OLEDs), organic photovoltaic cells (OPVs), organic light emitting cells (OLEECs), organic field effect transistors (OFETs), organic light emitting field effect transistors, organic lasers, organic spintronic devices, organic sensors, organic plasmon emitting diodes (Organic Plasmon Emitting Diodes), etc. Organic electronic devices are particularly preferably organic electroluminescent devices, such as OLEDs, OLEECs, and organic light emitting field effect transistors.

[0152] The above-mentioned organic electroluminescent device, especially OLED, comprises a substrate, an anode, at least one light-emitting layer, and a cathode.

[0153] Wherein, the substrate can be opaque or transparent. A transparent substrate can be used to manufacture a transparent light-emitting device. For example, see, Bulovic et al. Nature 1996, 380, p29, and Gu et al., Appl. Phys. Lett. 1996, 68, p2606. The substrate can be rigid or flexible. The material of the substrate can be any one of plastic, metal, semiconductor wafer, and glass. The substrate preferably has a smooth surface. A substrate without surface defects is a particularly ideal choice. In some embodiments, the substrate is flexible, and the material of the substrate can be selected from a polymer film or plastic, and its glass transition temperature Tg can be above 150°C, preferably above 200°C, more preferably above 250°C, and particularly preferably above 300°C. Examples of suitable flexible substrates include poly (ethylene terephthalate) (PET) and polyethylene glycol (2,6-naphthalene) (PEN).

[0154] The anode material may include one or more of a conductive metal, a conductive metal oxide, and a conductive polymer. The anode can easily inject holes into a hole injection layer (HIL) or a hole transport layer (HTL) or a light-emitting layer. In some embodiments, the absolute value of the difference between the work function of the anode material and the luminophore in the light-emitting layer, or the work function of the anode material and the HOMO energy level or valence band energy level of the p-type semiconductor (hole injection layer or hole transport layer or electron blocking layer) material is less than 0.5 eV, preferably less than 0.3 eV, and more preferably less than 0.2 eV. Examples of anode materials include, but are not limited to, Al, Cu, Au, Ag, Mg, Fe, Co, Ni, Mn, Pd, Pt, ITO, aluminum-doped zinc oxide (AZO), etc. Other suitable anode materials are known and can be easily selected and used by a person of ordinary skill in the art. The anode material can be deposited using any suitable technique, such as physical vapor deposition, including radio frequency magnetron sputtering, vacuum thermal evaporation, electron beam (e-beam), etc. In some embodiments, the anode is patterned. Patterned ITO conductive substrates are commercially available and can be used to prepare the organic electronic devices of the present invention.

[0155] The cathode material may include one or more of a conductive metal and a conductive metal oxide. The cathode may easily inject electrons into an electron injection layer (EIL) or an electron transport layer (ETL) or a light-emitting layer. In some embodiments, the absolute value of the difference between the work function of the cathode material and the luminophore in the light-emitting layer, or the work function of the cathode material and the LUMO energy level or conduction band energy level of the n-type semiconductor (electron injection layer or electron transport layer or hole blocking layer) material is less than 0.5 eV, preferably less than 0.3 eV, and more preferably less than 0.2 eV. In general, cathode materials that can be used as OLEDs may be used as cathode materials for organic electronic devices provided by the present invention. Examples of cathode materials include, but are not limited to, Al, Au, Ag, Ca, Ba, Mg, LiF / Al, MgAg alloys, BaF2 / Al, Cu, Fe, Co, Ni, Mn, Pd, Pt, ITO, etc. The cathode material may be deposited using any suitable technique, such as physical vapor deposition, including radio frequency magnetron sputtering, vacuum thermal evaporation, electron beam (e-beam), etc.

[0156] OLED may further include other functional layers, such as a hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer (EBL), an electron injection layer (EIL), an electron transport layer (ETL), and a hole blocking layer (HBL). Materials suitable for these functional layers may be found in the above content, or in the detailed descriptions in, for example, WO2010135519A1, US20090134784A1, and WO2011110277A1, and the entire contents of the three patent documents are hereby incorporated herein by reference.

[0157] In some embodiments, the light-emitting layer of the organic electroluminescent device is prepared using the composition provided by the present invention.

[0158] The light emission wavelength of the organic electroluminescent device is 300 to 1000 nm, preferably 350 to 900 nm, and more preferably 400 to 800 nm.

[0159] The present invention also relates to the application of organic electronic devices in various electronic devices, including but not limited to display devices, lighting devices, light sources, and sensors.

[0160] The present invention also provides electronic equipment comprising the above organic electronic device, wherein the electronic equipment includes but is not limited to display equipment, lighting equipment, light source, sensor and the like.

[0161] The scheme of the present invention (especially the organic compound) is further described below in conjunction with specific embodiments. In the following embodiments, for the convenience of unified description and comparative analysis, the organic compound is preferably applied to the light-emitting layer of the OLED device. In addition, in the following embodiments, the raw materials used, unless otherwise specified, are all commercially available products.

[0162] Example 1

[0163] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0164]

[0165] Among them, the synthesis of intermediate 1-3: intermediate 1-1 (10mmol), compound 1-2 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) are dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent is removed by rotary evaporation, the liquid is extracted and washed with water, the organic phase is collected, and the intermediate 1-3 is obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 1-3 is 8.49mmol, the yield is 84.9%, and MS (ASAP) = 210.4.

[0166] Synthesis of intermediate 1-5: Under nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 1-3 and 10 mmol of intermediate 1-4 were added respectively, 100 ml of DMSO was poured in as solvent, dry Cs2CO3 was added as base, and the reaction was carried out at 120°C for 8 hours. The reaction was monitored by TLC (thin layer chromatography). After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times, the organic phases were combined, dried with anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 1-5. The molar weight of intermediate 1-5 was 8.17 mmol, the reaction yield was 81.7%, and MS (ASAP) = 572.6.

[0167] Synthesis of organic compound 1: 10 mmol of intermediate 1-5 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was evaporated under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phase was combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 1. The yield of organic compound 1 was 76.6%, MS (ASAP)=502.5.

[0168] Example 2

[0169] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0170]

[0171] Among them, the synthesis of intermediate 2-2: intermediate 1-1 (10mmol), compound 2-1 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) are dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent is removed by rotary evaporation, the liquid is extracted and washed with water, the organic phase is collected, and the intermediate 2-2 is obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 2-2 is 7.05mmol, the yield is 70.5%, and MS (ASAP) = 266.7.

[0172] Synthesis of intermediate 2-3: Under nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 2-2 and 10 mmol of intermediate 1-4 were added respectively, 100 ml of DMSO was poured in as solvent, dry Cs2CO3 was added as base, and the reaction was carried out at 120°C for 8 hours. The reaction was monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times, the organic phases were combined, dried with anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 2-3. The molar weight of intermediate 2-3 was 6.59 mmol, the reaction yield was 65.9%, and MS (ASAP) = 684.6.

[0173] Synthesis of organic compound 2: 10 mmol of intermediate 2-3 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30 °C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60 °C for reaction for 2 hours, and the n-hexane solvent was evaporated under reduced pressure. The reaction solution was cooled to -30 °C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0 °C, 42 mmol of N, N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and then the temperature was continued to be raised to 120 °C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phase was combined, and the solvent was evaporated to obtain a crude product, which was purified by a rapid silica gel column to obtain a pure product; it was recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 2. The yield of organic compound 2 was 45.9%, MS (ASAP)=614.5.

[0174] Example 3

[0175] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0176]

[0177] Among them, the synthesis of intermediate 3-2: intermediate 1-1 (10mmol), compound 3-1 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) are dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent is removed by rotary evaporation, the liquid is extracted and washed with water, the organic phase is collected, and the intermediate 3-2 is obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 3-2 is 7.53mmol, the yield is 75.3%, and MS (ASAP) = 260.3.

[0178] Synthesis of intermediate 3-3: Under a nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 3-2 and 10 mmol of intermediate 1-4 were added respectively, 100 ml of DMSO was poured in as a solvent, and dry Cs2CO3 was added as a base. The reaction was reacted at 120°C for 8 hours and monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times. The organic phases were combined, dried over anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 3-3. The molar weight of intermediate 3-3 was 6.91 mmol, the reaction yield was 69.1%, and MS (ASAP) = 672.5.

[0179] Synthesis of organic compound 3: 10 mmol of intermediate 3-3 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was evaporated under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phases were combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 3. The yield of organic compound 3 was 50.6%, MS (ASAP) = 602.7.

[0180] Example 4

[0181] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0182]

[0183] Among them, the synthesis of intermediate 4-2: intermediate 1-1 (10 mmol), compound 4-1 (10 mmol), Pd(dba)2 (0.1 mmol), TTBP (0.2 mmol) and sodium tert-butoxide (30 mmol) were dissolved in toluene and stirred at 100°C for 12 h under a nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, the liquid was extracted and washed with water, the organic phase was collected, and the intermediate 4-2 was obtained after drying, concentration under reduced pressure and column chromatography. The molar weight of intermediate 4-2 was 7.33 mmol, the yield was 73.3%, and MS (ASAP) = 286.4.

[0184] Synthesis of intermediate 4-3: Under nitrogen protection atmosphere, in a dry three-necked flask, 20 mmol of intermediate 4-2 and 10 mmol of intermediate 1-4 were added respectively, 100 ml of DMSO was poured in as solvent, dry Cs2CO3 was added as base, and the reaction was carried out at 120°C for 8 hours. The reaction was monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times. The organic phases were combined, dried with anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 4-3. The molar weight of intermediate 4-3 was 5.69 mmol, the reaction yield was 56.9%, and MS (ASAP) = 724.7.

[0185] Synthesis of organic compound 4: 10 mmol of intermediate 4-3 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was evaporated under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phase was combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 4. The yield of organic compound 4 was 32.8%, MS (ASAP) = 654.0.

[0186] Example 5

[0187] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0188]

[0189] Among them, the synthesis of intermediate 5-2: intermediate 1-1 (10mmol), compound 5-1 (10mmol), Pd(dba)2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) were dissolved in toluene and stirred at 100°C for 12h under a nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, the liquid was extracted and washed with water, the organic phase was collected, and the intermediate 5-2 was obtained after drying, concentration under reduced pressure and column chromatography. The molar weight of intermediate 5-2 was 8.42mmol, and the yield was 84.2%; MS (ASAP) = 300.6.

[0190] Synthesis of intermediate 5-3: Under a nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 5-2 and 10 mmol of intermediate 1-4 were added respectively, 100 ml of DMSO was poured in as a solvent, and dry Cs2CO3 was added as a base. The reaction was reacted at 120°C for 8 hours, and the reaction was monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times. The organic phases were combined, dried over anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 5-3. The molar weight of intermediate 5-3 was 6.49 mmol, the reaction yield was 64.9%, and MS (ASAP) = 752.7.

[0191] Synthesis of organic compound 5: 10 mmol of intermediate 5-3 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was evaporated under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phases were combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 5. The yield of organic compound 5 was 44.6%, MS (ASAP) = 682.5.

[0192] Example 6

[0193] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0194]

[0195] Among them, the synthesis of intermediate 6-2: intermediate 1-1 (10 mmol), compound 6-1 (10 mmol), Pd(dba)2 (0.1 mmol), TTBP (0.2 mmol) and sodium tert-butoxide (30 mmol) were dissolved in toluene and stirred at 100°C for 12 h under a nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, the liquid was extracted and washed with water, the organic phase was collected, and the intermediate 6-2 was obtained after drying, concentration under reduced pressure and column chromatography. The molar weight of intermediate 6-2 was 6.39 mmol, and the yield was 63.9%; MS (ASAP) = 314.5.

[0196] Synthesis of intermediate 6-3: Under a nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 6-2 and 10 mmol of intermediate 1-4 were added respectively, 100 ml of DMSO was poured in as a solvent, and dry Cs2CO3 was added as a base. The reaction was reacted at 120°C for 8 hours, and the reaction was monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times. The organic phases were combined, dried over anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 6-3. The molar weight of intermediate 6-3 was 5.61 mmol, the reaction yield was 56.1%, and MS (ASAP) = 780.6.

[0197] Synthesis of organic compound 6: 10 mmol of intermediate 6-3 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was removed under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phases were combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 6. The yield of organic compound 6 was 37.1%, MS (ASAP) = 710.7.

[0198] Example 7

[0199] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0200]

[0201]

[0202] Among them, the synthesis of intermediate 7-2: intermediate 1-1 (10mmol), compound 7-1 (10mmol), Pd(dba)2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) were dissolved in toluene and stirred at 100°C for 12h under a nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, the liquid was extracted and washed with water, the organic phase was collected, and the intermediate 7-2 was obtained after drying, concentration under reduced pressure and column chromatography. The molar weight of intermediate 7-2 was 7.36mmol, the yield was 73.6%, and MS (ASAP) = 300.0.

[0203] Synthesis of intermediate 7-3: Under a nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 7-2 and 10 mmol of intermediate 1-4 were added respectively, 100 ml of DMSO was poured in as a solvent, and dry Cs2CO3 was added as a base. The reaction was reacted at 120°C for 8 hours, and the reaction was monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times. The organic phases were combined, dried over anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 7-3. The molar weight of intermediate 7-3 was 5.29 mmol, the reaction yield was 52.9%, and MS (ASAP) = 752.7.

[0204] Synthesis of organic compound 7: 10 mmol of intermediate 7-3 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was removed under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phases were combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 7. The yield of organic compound 7 was 42.5%, MS (ASAP) = 682.5.

[0205] Example 8

[0206] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0207]

[0208] Synthesis of intermediate 8-4: Intermediate 8-2 (10 mmol), compound 8-3 (10 mmol), Pd(dba)2 (0.1 mmol), TTBP (0.2 mmol) and sodium tert-butoxide (30 mmol) were dissolved in toluene and stirred at 100°C for 12 h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, and the separated liquid was extracted and washed with water, and the organic phase was collected and dried, concentrated under reduced pressure and column chromatography to obtain intermediate 8-4. The molar weight of intermediate 8-4 was 8.69 mmol, and the yield was 86.9%; MS (ASAP) = 269.3.

[0209] Synthesis of intermediate 8-5: Under a nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 4-2 and 10 mmol of intermediate 8-1 were added respectively, 100 ml of DMSO was poured in as a solvent, and dry Cs2CO3 was added as a base. The reaction was reacted at 120°C for 8 hours and monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times. The organic phases were combined, dried over anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 8-5. The molar weight of intermediate 8-5 was 5.69 mmol, the reaction yield was 56.9%, and MS (ASAP) = 758.5.

[0210] Synthesis of intermediate 8-6: 10 mmol of intermediate 8-5 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of n-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was evaporated under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C and 42 mmol of After the addition of N,N-diisopropylethylamine is completed, the temperature is raised to room temperature and stirred, and then the temperature is continued to be raised to 120°C and stirred for 3 hours, and the reaction solution is cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate are added to quench the reaction; the aqueous phase is extracted with ethyl acetate and the organic phases are combined, and the solvent therein is evaporated to obtain a crude product, which is purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, which is intermediate 8-6, the molar weight of intermediate 8-6 is 3.28 mmol, the yield is 32.8%, and MS (ASAP) = 688.5.

[0211] Synthesis of organic compound 8: Intermediate 8-6 (10 mmol), intermediate 8-4 (10 mmol), Pd(dba)2 (0.1 mmol), TTBP (0.2 mmol) and sodium tert-butoxide (30 mmol) were dissolved in toluene and stirred at 100°C for 12 h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, and the separated liquid was extracted and washed with water, and the organic phase was collected and dried, concentrated under reduced pressure and subjected to column chromatography to obtain organic compound 8. The yield of organic compound 8 was 74.9%, and MS (ASAP) = 921.0.

[0212] Example 9

[0213] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0214]

[0215] Among them, the synthesis of intermediate 9-3: intermediate 9-1 (10mmol), compound 9-2 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) were dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, extracted and washed with water, the organic phase was collected, and the intermediate 9-3 was obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 9-3 was 8.11mmol, the yield was 81.1%, and MS (ASAP) = 269.5.

[0216] Synthesis of organic compound 9: Intermediate 8-6 (10 mmol), intermediate 9-3 (10 mmol), Pd(dba)2 (0.1 mmol), TTBP (0.2 mmol) and sodium tert-butoxide (30 mmol) were dissolved in toluene and stirred at 100°C for 12 h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, and the separated liquid was extracted and washed with water, and the organic phase was collected and dried, concentrated under reduced pressure and column chromatography to obtain organic compound 9. The yield of organic compound 9 was 73.5%, and MS (ASAP) = 921.7.

[0217] Example 10

[0218] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0219]

[0220] Among them, the synthesis of intermediate 10-1: intermediate 2-1 (10mmol), compound 8-3 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) are dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent is removed by rotary evaporation, the liquid is extracted and washed with water, the organic phase is collected, and the intermediate 10-1 is obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 10-1 is 7.36mmol, the yield is 73.6%, and MS (ASAP) = 275.5.

[0221] Synthesis of organic compound 10: Intermediate 8-6 (10 mmol), intermediate 10-1 (10 mmol), Pd(dba)2 (0.1 mmol), TTBP (0.2 mmol) and sodium tert-butoxide (30 mmol) were dissolved in toluene and stirred at 100°C for 12 h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, and the separated liquid was extracted and washed with water, and the organic phase was collected and dried, concentrated under reduced pressure and subjected to column chromatography to obtain organic compound 10. The yield of organic compound 10 was 66.2%, and MS (ASAP) = 927.6.

[0222] Embodiment 11

[0223] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0224]

[0225] Among them, the synthesis of intermediate 11-2: intermediate 2-1 (10mmol), compound 11-1 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) are dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent is removed by rotary evaporation, the liquid is extracted and washed with water, the organic phase is collected, and the intermediate 11-2 is obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 11-2 is 8.59mmol, the yield is 85.9%, and MS (ASAP) = 225.7.

[0226] Synthesis of organic compound 11: Intermediate 8-6 (10 mmol), intermediate 11-2 (10 mmol), Pd(dba)2 (0.1 mmol), TTBP (0.2 mmol) and sodium tert-butoxide (30 mmol) were dissolved in toluene and stirred at 100°C for 12 h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, and the separated liquid was extracted and washed with water, and the organic phase was collected and dried, concentrated under reduced pressure and subjected to column chromatography to obtain organic compound 11. The yield of organic compound 11 was 60.8%, and MS (ASAP) = 877.6.

[0227] Example 12

[0228] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0229]

[0230] Among them, the synthesis of intermediate 12-3: intermediate 12-1 (10mmol), compound 12-2 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) were dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, the liquid was extracted and washed with water, the organic phase was collected, and the intermediate 12-3 was obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 12-3 was 8.94mmol, the yield was 89.4%, and MS (ASAP) = 357.5.

[0231] Synthesis of organic compound 12: Intermediate 8-6 (10 mmol), intermediate 12-3 (10 mmol), Pd(dba)2 (0.1 mmol), TTBP (0.2 mmol) and sodium tert-butoxide (30 mmol) were dissolved in toluene and stirred at 100°C for 12 h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, and the separated liquid was extracted and washed with water, and the organic phase was collected and dried, concentrated under reduced pressure and subjected to column chromatography to obtain organic compound 12. The yield of organic compound 12 was 53.9%, and MS (ASAP) = 1009.9.

[0232] Embodiment 13

[0233] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0234]

[0235] Among them, the synthesis of intermediate 13-2: intermediate 12-1 (10mmol), compound 13-1 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) were dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, extracted and washed with water, the organic phase was collected, and the intermediate 13-2 was obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 13-2 was 7.17mmol, the yield was 71.7%, and MS (ASAP) = 323.6.

[0236] Synthesis of organic compound 13: Intermediate 8-6 (10 mmol), intermediate 13-2 (10 mmol), Pd(dba)2 (0.1 mmol), TTBP (0.2 mmol) and sodium tert-butoxide (30 mmol) were dissolved in toluene and stirred at 100°C for 12 h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, the liquid was extracted and washed with water, the organic phase was collected, and the organic phase was dried, concentrated under reduced pressure and subjected to column chromatography to obtain organic compound 13. The yield of organic compound 13 was 75.7%, and MS (ASAP) = 975.7.

[0237] Embodiment 14

[0238] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0239]

[0240] Among them, the synthesis of intermediate 14-2: intermediate 14-1 (10mmol), compound 1-2 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) were dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, the liquid was extracted and washed with water, the organic phase was collected, and the intermediate 14-2 was obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 14-2 was 7.29mmol, the yield was 72.9%, and MS (ASAP) = 252.5.

[0241] Synthesis of intermediate 14-4: Under nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 14-2 and 10 mmol of intermediate 14-3 were added respectively, 100 ml of DMSO was poured in as solvent, dry Cs2CO3 was added as base, and the reaction was carried out at 120°C for 8 hours. The reaction was monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times, the organic phases were combined, dried with anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 14-4. The molar weight of intermediate 14-4 was 5.97 mmol, the reaction yield was 59.7%, and MS (ASAP) = 698.6.

[0242] Synthesis of organic compound 14: 10 mmol of intermediate 14-4 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was evaporated under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phases were combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 14. The yield of organic compound 14 was 25.9%, MS (ASAP) = 628.0.

[0243] Embodiment 15

[0244] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0245]

[0246] Synthesis of intermediate 15-3: Intermediate 15-1 (10 mmol) and intermediate 15-2 (10 mmol) were dissolved in a mixed solvent of 1,4-dioxane and water (21 ml and 2 ml, respectively), and Pd(PPh3)4 (0.1 mmol) and potassium carbonate (30 mmol) were added; stirred at 100°C for 6 h under a nitrogen atmosphere; after cooling, most of the solvent was removed by rotary evaporation, and then the liquid was extracted and washed with water, and the organic phase was column chromatographed and recrystallized to obtain intermediate 15-3. The molar weight of intermediate 15-3 was 7.84 mmol, the yield was 78.4%, and MS (ASAP) = 499.3.

[0247] Synthesis of intermediate 15-5: Intermediate 15-3 (10 mmol) and intermediate 15-4 (10 mmol) were dissolved in a mixed solvent of 1,4-dioxane and water (21 ml and 2 ml, respectively), and Pd(PPh3)4 (0.1 mmol) and potassium carbonate (30 mmol) were added; stirred at 100°C for 6 h under a nitrogen atmosphere; after cooling, most of the solvent was removed by rotary evaporation, and then the liquid was extracted and washed with water, and the organic phase was column chromatographed and recrystallized to obtain intermediate 15-5. The molar weight of intermediate 15-5 was 6.31 mmol, the yield was 63.1%, and MS (ASAP) = 539.4.

[0248] Synthesis of intermediate 15-6: Under nitrogen atmosphere, in a dry three-necked flask, add 20 mmol of intermediate 4-2 and 10 mmol of intermediate 15-5, pour 100 ml of DMSO as solvent, add dry Cs2CO3 as base, react at 120°C for 8 hours, monitor the reaction by TLC, and after the reaction is complete, cool the reaction solution to room temperature, add water and dichloromethane in turn, wash the reaction solution with water for several times, extract the aqueous phase with dichloromethane for several times, combine the organic phases, dry with anhydrous Na2CO3, filter, spin dry the reaction solution to obtain a crude product, and recrystallize with ethyl acetate to obtain intermediate 15-6. The molar weight of intermediate 15-6 is 5.21 mmol, the reaction yield is 52.1%, and MS (ASAP) = 1072.2.

[0249] Synthesis of organic compound 15: 10 mmol of intermediate 15-6 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was evaporated under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phases were combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 15. The yield of organic compound 15 was 19.6%, MS (ASAP) = 1002.6.

[0250] Example 16

[0251] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0252]

[0253] Synthesis of intermediate 16-2: Intermediate 15-1 (10 mmol) and intermediate 16-1 (10 mmol) were dissolved in a mixed solvent of 1,4-dioxane and water (21 ml and 2 ml, respectively), and Pd(PPh3)4 (0.1 mmol) and potassium carbonate (30 mmol) were added; stirred at 100°C for 6 h under a nitrogen atmosphere; after cooling, most of the solvent was removed by rotary evaporation, and then the liquid was extracted and washed with water, and the organic phase was column chromatographed and recrystallized to obtain intermediate 16-2. The molar weight of intermediate 16-2 was 7.19 mmol, the yield was 71.9%, and MS (ASAP) = 499.3.

[0254] Synthesis of intermediate 16-3: Intermediate 16-2 (10 mmol) and intermediate 15-4 (10 mmol) were dissolved in a mixed solvent of 1,4-dioxane and water (21 ml and 2 ml respectively), and Pd(PPh3)4 (0.1 mmol) and potassium carbonate (30 mmol) were added; stirred at 100°C for 6 h under a nitrogen atmosphere; after cooling, most of the solvent was removed by rotary evaporation, and then the liquid was extracted and washed with water, and the organic phase was subjected to column chromatography and recrystallization to obtain intermediate 16-3. The molar weight of intermediate 16-3 was 5.72 mmol, the yield was 57.2%, and MS (ASAP) = 539.2.

[0255] Synthesis of intermediate 16-4: Under nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 4-2 and 10 mmol of intermediate 16-3 were added respectively, 100 ml of DMSO was poured in as solvent, dry Cs2CO3 was added as base, and the reaction was carried out at 120°C for 8 hours. The reaction was monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times, the organic phases were combined, dried with anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 16-4. The molar weight of intermediate 16-4 was 5.09 mmol, the reaction yield was 50.9%, and MS (ASAP) = 1072.7.

[0256] Synthesis of organic compound 16: 10 mmol of intermediate 16-4 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was evaporated under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phases were combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 16. The yield of organic compound 16 was 22.3%, MS (ASAP) = 1002.0.

[0257] Embodiment 17

[0258] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0259]

[0260] Among them, the synthesis of intermediate 17-3: intermediate 17-1 (10mmol), compound 17-2 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) were dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, extracted and washed with water, the organic phase was collected, and the intermediate 17-3 was obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 17-3 was 8.32mmol, the yield was 83.2%, and MS (ASAP) = 292.5.

[0261] Synthesis of intermediate 17-4: Under nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 17-3 and 10 mmol of intermediate 1-4 were added respectively, 100 ml of DMSO was poured in as solvent, dry Cs2CO3 was added as base, and the reaction was carried out at 120°C for 8 hours. The reaction was monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times, the organic phases were combined, dried with anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 17-4. The molar weight of intermediate 17-4 was 6.84 mmol, the reaction yield was 68.4%, and MS (ASAP) = 736.1.

[0262] Synthesis of organic compound 17: 10 mmol of intermediate 17-4 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was removed under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phases were combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 17. The yield of organic compound 17 was 21.8%, MS (ASAP) = 666.2.

[0263] Embodiment 18

[0264] This embodiment provides a boron-containing tetrahydroquinoxaline organic compound, and the specific synthesis route is as follows:

[0265]

[0266] Among them, the synthesis of intermediate 18-2: intermediate 18-1 (10mmol), compound 1-2 (10mmol), Pd (dba) 2 (0.1mmol), TTBP (0.2mmol) and sodium tert-butoxide (30mmol) were dissolved in toluene, stirred at 100°C for 12h under nitrogen atmosphere; after cooling, the solvent was removed by rotary evaporation, extracted and washed with water, the organic phase was collected, and intermediate 18-2 was obtained after drying, vacuum concentration and column chromatography. The molar weight of intermediate 18-2 was 8.11mmol, the yield was 81.1%, and MS (ASAP) = 224.3.

[0267] Synthesis of intermediate 18-3: Under nitrogen atmosphere, in a dry three-necked flask, 20 mmol of intermediate 18-2 and 10 mmol of intermediate 1-4 were added respectively, 100 ml of DMSO was poured in as solvent, dry Cs2CO3 was added as base, and the reaction was carried out at 120°C for 8 hours. The reaction was monitored by TLC. After the reaction was complete, the reaction solution was cooled to room temperature, water and dichloromethane were added in sequence, the reaction solution was washed with water for several times, and the aqueous phase was extracted with dichloromethane for several times, the organic phases were combined, dried with anhydrous Na2CO3, filtered, and the reaction solution was spin-dried to obtain a crude product, which was recrystallized from ethyl acetate to obtain intermediate 18-3. The molar weight of intermediate 18-3 was 7.55 mmol, the reaction yield was 75.5%, and MS (ASAP) = 600.1.

[0268] Synthesis of organic compound 18: 10 mmol of intermediate 18-3 and 100 ml of dry tert-butylbenzene were added to a 250 ml three-necked flask, cooled to -30°C in a N2 atmosphere, and 21 mmol of t-BuLi n-hexane solution was added dropwise; the temperature was raised to 60°C for reaction for 2 hours, and the n-hexane solvent was evaporated under reduced pressure; the reaction solution was cooled to -30°C again, 21 mmol of boron tribromide solution was added, the temperature was raised to room temperature and stirred for 0.5 hours, and then the reaction solution was cooled to 0°C, 42 mmol of N,N-diisopropylethylamine was added, and after the addition was complete, the temperature was raised to room temperature and stirred, and the temperature was further raised to 120°C and stirred for 3 hours, and the reaction solution was cooled to room temperature; sodium carbonate aqueous solution and ethyl acetate were added to quench the reaction; the aqueous phase was extracted with ethyl acetate and the organic phases were combined, and the solvent was evaporated to obtain a crude product, which was purified by rapid silica gel column to obtain a pure product; recrystallized from toluene and ethyl acetate to obtain a light yellow solid powder, i.e., organic compound 18. The yield of organic compound 18 was 34.3%, MS (ASAP) = 530.4.

[0269] Comparative Example 1

[0270] The comparative compound provided in this comparative example has the structural formula shown below:

[0271]

[0272] Properties of organic compounds

[0273] The energy levels of the organic compounds provided in Examples 1 to 18 and the comparative compounds provided in Comparative Example 1 can be obtained by quantum calculation, for example, by Gaussian09W (Gaussian Inc.) according to TD-DFT (time-dependent density functional theory). The specific simulation method can be found in patent WO2011141110. During the calculation, the semi-empirical method "Ground State / Semi-empirical / Default Spin / AM1" (Charge 0 / Spin Singlet) is first used to optimize the molecular geometry, and then the energy structure of the organic molecule is calculated by the TD-DFT (time-dependent density functional theory) method "TD-SCF / DFT / DefaultSpin / B3PW91" and the basis set "6-31G(d)" (Charge 0 / Spin Singlet). The HOMO and LUMO energy levels are calculated according to the following calibration formula, and S1, T1 and the resonance factor f(S1) are used directly:

[0274] HOMO(eV)=((HOMO(G)×27.212)-0.9899) / 1.1206

[0275] LUMO(eV)=((LUMO(G)×27.212)-2.0041) / 1.385

[0276] Wherein HOMO, LUMO, T1 and S1 are the direct calculation results of Gaussian 09W, and the unit is Hartree. The calculation results of the organic compounds provided in each embodiment and the comparative compounds provided in Comparative Example 1 are shown in Table 1:

[0277] Table 1

[0278]

[0279] Preparation and characterization of OLED devices

[0280] Here, materials BH, ET, Liq, and BD-Ref are provided. The aforementioned materials can be purchased commercially or synthesized by existing technologies. The synthesis technology can be referred to existing literature and will not be described in detail here. Among them, BH is used as the main material of the light-emitting layer, ET is used as the electron transport material, and Liq is used as the electron injection material. The structural formulas of each material are as follows:

[0281]

[0282] The following is a detailed description of the preparation process of an OLED device using the above compounds. Figure 1, wherein 10 represents a substrate, 20 represents an anode, 30 represents a hole injection layer (HIL), 40 represents a hole transport layer (HTL), 50 represents an emission layer (EML), 60 represents an electron transport layer (ETL), and 70 represents a cathode. The structure of the prepared OLED 100 device is: ITO / HIL 30 / HTL 40 / EML 50 / ETL 60 / cathode 70, and the preparation method of the device is as follows:

[0283] a. providing an ITO (indium tin oxide) conductive glass substrate, cleaning the ITO conductive glass substrate with a cleaning agent, and then performing an ultraviolet ozone treatment; wherein the cleaning agent may be one or more of chloroform, acetone, and isopropyl alcohol, but is not limited thereto;

[0284] b. In a clean room, PEDOT (polyethylene dioxythiophene, Clevios TM AI4083), and then treated on a hot plate at 180°C for 10 minutes to obtain a hole injection layer 30 with a thickness of 40 nm;

[0285] c. In a nitrogen glove box, a solution with a concentration of 5 mg / ml was spin-coated on the hole injection layer 30, and then treated on a hot plate at 180° C. for 60 minutes to obtain a hole transport layer 40 with a thickness of 20 nm; wherein the solution used was a TFB (Sigma Aldrich, average Mn of 25,000-50,000) solution using toluene as a solvent;

[0286] d. In a nitrogen glove box, spin-coat the composition provided in the embodiment with a concentration of 15 mg / ml on the hole transport layer 40, and then treat it on a hot plate at 140° C. for 10 minutes to obtain a light-emitting layer 50 with a thickness of 40 nm; wherein the organic solvent of the composition is methyl benzoate, the solute comprises a host material and a guest material in a weight ratio of 95:5, the host material is BH, and the guest material is the organic compound provided in Example 1;

[0287] e. The semi-finished device was transferred to a vacuum chamber, and ET and Liq were placed in different evaporation units under high vacuum (1×10 -6 mbar) in a ratio of 50 wt % to form an electron transport layer 60 with a thickness of 20 nm on the light emitting layer 50, and then deposit an Al cathode 70 with a thickness of 100 nm to obtain an OLED device;

[0288] f. In a nitrogen glove box, encapsulate the OLED device with UV-curable resin.

[0289] OLED-2 to OLED-18 and OLED-Ref1 were prepared respectively using the organic compounds provided in Examples 2 to 18 and the comparative compounds provided in Comparative Example 1 according to the device structure and preparation method of Example 1 (wherein the guest material in step d was replaced by the organic compound provided in each Example or the comparative compound provided in the comparative example, see Table 2 for details). The current-voltage (JV) characteristics of each prepared OLED device were characterized by a characterization device, and the voltage @1knits, luminous efficiency (CE@1knits) and life (LT90@1knits) were recorded at the same time. The results are shown in Table 2:

[0290] Table 2

[0291]

[0292] It can be seen from Table 2 that compared with the blue light OLED device prepared by using the comparative compound of Comparative Example 1 as the guest material in the light-emitting layer, the color coordinates of the blue light OLED device prepared by using the organic compound provided in Examples 1 to 18 as the guest material in the light-emitting layer are better. In addition, the luminous efficiency of the blue light OLED devices prepared by using the organic compound provided in Examples 1 to 18 as the guest material in the light-emitting layer is in the range of 5.3 to 6.3 cd / A, and these devices have more excellent luminous efficiency. In particular, the luminous efficiency of the blue light OLED devices prepared by using the organic compound provided in Examples 1 to 4 as the guest material in the light-emitting layer is in the range of 6.0 to 6.3 cd / A, and the lifespan is more than 160 hours. It can be seen that these devices have particularly excellent luminous efficiency and lifespan. Compared with the comparative compound provided in Comparative Example 1, the organic compound provided in Examples 1 to 18 reduces two benzene rings in the structure, so that the overall structure has two aliphatic rings, thereby making the overall molecule more soluble and easier to purify the compound, thereby improving the purity of the compound and thus improving the device performance. Compared with the blue OLED device prepared using the comparative compound of Comparative Example 1 as the guest material in the light-emitting layer, the lifespan of the blue OLED device prepared using the organic compounds provided in Examples 1 to 18 as the guest material in the light-emitting layer is generally increased by 85 to 100%.

[0293] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the methods and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An organic compound, characterized in that It has a structure as shown in formula (I): in, n1 is selected from 0 or 1; n2 is selected from 0 or 1; n3 is selected from 0, 1 or 2; R1 and R2, when present, are independently selected from methyl or -iPr; Each occurrence of R3 is independently selected from -iPr, dibenzofuranyl, dibenzothiophenyl or R4 and R5, when they appear each time, are independently selected from naphthyl, phenyl substituted or unsubstituted by R0, benzothienyl substituted or unsubstituted by R0, benzofuranyl substituted or unsubstituted by R0; Each occurrence of R0 is independently selected from -iPr, -tBu or -Ph; * indicates the attachment site; Ar1 and Ar2 are independently selected from any one of the structures shown in formula (B-1), formula (B-2), formula (B-4), and formula (B-7): X is selected from CR9; W is independently selected from -O- or -S- at each occurrence; Each occurrence of R9 is independently selected from hydrogen, -tBu or methyl.

2. The organic compound according to claim 1, characterized in that The formula (I) is selected from one of the structures shown in formula (II-1), formula (II-2) and formula (II-3): wherein n1 is selected from 0 or 1; and / or n2 is selected from 0 or 1.

3. The organic compound according to claim 2, characterized in that The formula (II-1) is selected from one of the structures shown in formula (III-1) and formula (III-2): The formula (II-2) is selected from one of the structures shown in formula (III-4) and formula (III-5): The formula (II-3) is selected from one of the structures shown in formula (III-7):

4. The organic compound according to any one of claims 1 to 3, characterized in that Each occurrence of R3 is independently selected from iPr or the following groups:

5. The organic compound according to claim 1, characterized in that The organic compound is selected from the following structures:

6. A mixture, characterized in that It comprises the organic compound according to any one of claims 1 to 5 and at least one organic functional material, wherein the organic functional material is selected from one of hole injection materials, hole transport materials, electron transport materials, electron injection materials, electron blocking materials, hole blocking materials, luminescent materials, host materials, and organic dyes.

7. A composition, characterized in that The method comprises the organic compound according to any one of claims 1 to 5 or the mixture according to claim 6, and at least one organic solvent.

8. An organic electronic device, characterized in that: The invention comprises at least one functional layer, wherein the functional layer comprises the organic compound according to any one of claims 1 to 5, or the functional layer comprises the mixture according to claim 6, or the functional layer is prepared by the composition according to claim 7.

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