Organic compound and organic electroluminescent device

Abstract

The invention belongs to the technical field of organic electroluminescence, and discloses an organic compound and an organic electroluminescence device. The structural general formula of the organic compound is as shown in formula (A): # imgabs0. The organic compound has the characteristic of high electron mobility and is beneficial to reducing the power consumption of a device.

Description

Technical Field

[0001] The present application belongs to the technical field of organic electroluminescence, and in particular relates to an organic compound and an organic electroluminescent device. Background Art

[0002] Organic light emitting diodes (OLED) have been widely used in the display and lighting industries, especially in mobile phone displays. This is mainly due to the excellent characteristics of OLED, such as self-luminescence, wide viewing angle, high contrast, fast response speed and the ability to prepare flexible devices.

[0003] With the continuous advancement of OLED technology in the two major fields of lighting and display, people have put forward higher demands on the device performance of OLED, requiring low power consumption, high efficiency and long life at the same time. This has brought great opportunities and challenges to technical personnel in this field to design and develop functional materials of various structures.

[0004] The most common OLED device structure usually includes the following types of organic materials: hole injection materials, hole transport materials, electron transport materials, and luminescent materials (including host materials and guest materials). At present, electron transport materials, as an important functional material, have a direct impact on the mobility of electrons and ultimately affect the luminous efficiency of OLEDs. At present, improving the mobility of electron transport materials and reducing device power consumption have become an important direction in the development of device performance.

[0005] In addition, multiple pairs of OLED devices are stacked together, that is, a tandem OLED structure. The tandem OLED includes a charge generation layer placed between the first light-emitting stack and the second light-emitting stack to improve the current efficiency in each light-emitting layer while ensuring that the charge is effectively distributed to the light-emitting stack. Generally, the charge generation layer includes an N-type charge generation layer and a P-type charge generation layer, and the N-type charge generation layer is also an electron transport material. The improvement of the mobility of this layer of material is also conducive to reducing the power consumption of the stacked device.

[0006] Therefore, there is an urgent need to provide a new organic compound or organic electroluminescent device to solve the electron mobility of OLED devices, thereby solving the problem of device power consumption. Summary of the invention

[0007] The present application aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present application proposes an organic compound and an organic electroluminescent device.

[0008] A first aspect of the present application provides an organic compound.

[0009] In some embodiments, an organic compound has a general structural formula as shown in formula (A):

[0010]

[0011] Wherein, L1-L4 are independently selected from a single bond, an R-substituted or unsubstituted arylene group having 6 to 60 ring carbon atoms, and an R-substituted or unsubstituted heteroarylene group having 2 to 60 ring carbon atoms;

[0012] Ar1-Ar4 are independently selected from R substituted or unsubstituted C6 to C60 aryl, R substituted or unsubstituted C3 to C60 heteroaryl, R substituted or unsubstituted C6-C30 arylphosphinoyl;

[0013] The R is selected from at least one of a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a deuterium group, a cyano group, a nitro group, a hydrazine group, a sulfonic acid group, a C1 to C20 alkylsilyl group, a C1 to C20 alkoxysilyl group, a C3 to C30 cycloalkylsilyl group, a C6 to C30 arylsilyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a C1 to C20 alkylamino group, and an unsubstituted amine group;

[0014] The substitution in R is substituted by at least one of halogen, C1-C4 alkyl, deuterium, C6 to C30 aryl or C3 to C30 heteroaryl;

[0015] m1-m4, n1-n2 are independently selected from integers of 0-3;

[0016] The heteroatoms in the heteroarylene group and the heteroaryl group are oxygen or nitrogen family elements;

[0017] The organic compound is not Among them, R a It is H, F, C1-C4 alkyl, methoxy, phenoxy or -N(CH3)2.

[0018] In some embodiments, the heteroatom in the heteroarylene group and the heteroaryl group is at least one of N, O and S.

[0019] In some embodiments, L1-L4 are independently selected from a single bond, an R-substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, and an R-substituted or unsubstituted heteroarylene group having 5 to 30 ring carbon atoms.

[0020] In some embodiments, L1-L4 are independently selected from a single bond, an R-substituted or unsubstituted arylene group having 6 to 20 ring carbon atoms, and an R-substituted or unsubstituted heteroarylene group having 5 to 20 ring carbon atoms.

[0021] In some embodiments, Ar1-Ar4 are independently selected from R substituted or unsubstituted C6 to C30 aryl, R substituted or unsubstituted C3 to C30 heteroaryl, and R substituted or unsubstituted C6-C20 arylphosphinoyl.

[0022] In some embodiments, Ar1-Ar4 are independently selected from R substituted or unsubstituted C6 to C20 aryl, R substituted or unsubstituted C3 to C20 heteroaryl, and R substituted or unsubstituted C6-C10 arylphosphinoyl.

[0023] In some embodiments, R is selected from at least one of a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a cyano group, a nitro group, a hydrazino group, a sulfonic acid group, a C1 to C10 alkylsilyl group, a C1 to C10 alkoxysilyl group, a C3 to C20 cycloalkylsilyl group, a C6 to C20 arylsilyl group, a substituted or unsubstituted C6 to C20 aryl group, a substituted or unsubstituted C3 to C20 heteroaryl group, a C1 to C10 alkylamine group, and an unsubstituted amine group.

[0024] In some embodiments, formula (A) is represented by the following formula (B):

[0025]

[0026] In formula (B), m1, m2, L1, L2 and Ar1, Ar2 are the same as defined in formula (A).

[0027] In some embodiments, L1-L4 is a single bond or at least one of the following structures:

[0028]

[0029] In some embodiments, Ar1 and Ar2 are independently selected from R substituted or unsubstituted C6 to C20 aryl, R substituted or unsubstituted C3 to C20 heteroaryl, R substituted or unsubstituted C6 to C20 arylphosphinoxy, wherein R is selected from at least one of substituted or unsubstituted C1 to C10 alkyl, substituted or unsubstituted C1 to C10 alkoxy, halogen, cyano, substituted or unsubstituted C6 to C10 aryl, substituted or unsubstituted C3 to C10 heteroaryl, C1 to C20 alkylamine and unsubstituted amine.

[0030] In some embodiments, the heteroaryl group is a group containing one or more SP 2 Hybridized nitrogen atoms.

[0031] Preferably, Ar1-Ar4 is at least one of the following structures:

[0032]

[0033]

[0034]

[0035] In some embodiments, the structure of the organic compound described in the present application is one of the following structural formulas:

[0036]

[0037]

[0038]

[0039] A second aspect of the present application provides an organic electroluminescent device.

[0040] There are many forms of organic electroluminescent devices, and the organic electroluminescent devices are divided into upright structures and inverted structures. The organic electroluminescent device of the upright structure includes a substrate, an anode, a light-emitting structure, and a cathode stacked from bottom to top. The organic electroluminescent device of the inverted structure may include a substrate, a cathode, a light-emitting structure, and an anode stacked from bottom to top.

[0041] In some embodiments, the light emitting structure may include a plurality of light emitting units arranged in a stacked manner.

[0042] In some embodiments, an organic electroluminescent device comprises:

[0043] anode;

[0044] a first light emitting stack disposed on the anode;

[0045] a charge generation layer disposed on the first light-emitting stack, the charge generation layer comprising the organic compound;

[0046] a second light emitting stack disposed on the charge generation layer;

[0047] and a cathode disposed on the second light emitting stack.

[0048] In some embodiments, the charge generation layer includes an N-type charge generation layer and a P-type charge generation layer that are stacked, and the organic compound is located in the N-type charge generation layer.

[0049] In some embodiments, the first light-emitting stack includes a first hole transport layer, a first light-emitting layer, and a first electron transport layer arranged in a stacked manner, and the first hole transport layer is close to the anode; the second light-emitting stack includes a second hole transport layer, a second light-emitting layer, and a second electron transport layer arranged in a stacked manner, and the second hole transport layer is close to the first electron transport layer. In this embodiment, the N-type charge generation layer in the charge generation layer is close to the first electron transport layer.

[0050] In some embodiments, at least one of the first electron transport layer, the second electron transport layer, and the charge generation layer includes the organic compound.

[0051] In some embodiments, a first hole injection layer is further disposed between the anode and the first hole transport layer.

[0052] In some embodiments, a first electron blocking layer is further disposed between the first hole transport layer and the first light-emitting layer.

[0053] In some embodiments, a second electron blocking layer is further disposed between the second hole transport layer and the second light-emitting layer.

[0054] In some embodiments, a second electron injection layer is further disposed between the second electron transport layer and the cathode.

[0055] In some embodiments, the N-type charge generation layer further comprises at least one of a lanthanide metal, a transition metal, an alkali metal, or an alkaline earth metal.

[0056] A display or lighting element comprises the above organic electroluminescent device.

[0057] Compared with the prior art, the beneficial effects of this application are as follows:

[0058] The organic compound described in the present application is an organic compound containing imidazo[1,10]phenanthroline, which has the characteristics of high electron mobility and is beneficial to reducing the power consumption of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 Schematic diagram of the structure of the organic electroluminescent device in the embodiment of the present application. DETAILED DESCRIPTION

[0060] In order to make the technical solution described in this application more clearly understood by those skilled in the art, the following examples are listed for illustration. It should be noted that the following examples do not limit the scope of protection claimed in this application.

[0061] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper" and "lower" and the like is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features.

[0062] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] In the present application, the aryl group may be an aryl group selected from phenyl, naphthyl, anthryl, phenanthrenyl, naphthacene, pyrenyl, fluorenyl and the like.

[0064] The heteroaryl group can be pyrrolyl, pyrazinyl, pyridinyl, pyrimidinyl, triazine, indolyl, isoindolyl, imidazolyl, furanyl, benzofuranyl, thienyl, piperidinyl, piperazinyl, quinolyl, isoquinolyl, quinazolinyl, quinoxalinyl, naphthyridinyl, phenanthrolinyl, phenanthrolinimidazolyl, oxazolyl, benzphenanthrolinyl, etc.

[0065] Unless otherwise specified, the raw materials, reagents or devices used in the following examples can be obtained from conventional commercial sources or by existing known methods.

[0066] The synthetic route of organic compound C4 is as follows:

[0067]

[0068] 3.8 g (C1-a) and 200 mL acetic acid were added to a reaction flask, and then 1.37 g (C4-a), 1.27 g (C4-b), and 10 g ammonium acetate were added to the reaction flask, the nitrogen was replaced 3 times, the reaction was heated to 110°C and stirred to react overnight, and the reaction was stopped after the raw materials reacted to obtain a reaction solution, which was dried at 80°C, and 100 mL deionized water and 20 g sodium carbonate were added to neutralize to pH = 8. The aqueous phase was extracted with dichloromethane, dried at 60°C, and purified by column chromatography to obtain 5.52 g of a light yellow solid (organic compound C4) with a yield of 82%.

[0069] The hydrogen spectrum nuclear magnetic characterization data of the light yellow solid (organic compound C4) are: 1 H NMR(400MHz,Chloroform-d)δ8.98(dd,J=4.2,2.0Hz,2H),8.75(dd,J=8.4,1.8Hz,1H),8.68(dd,J=7.0,2.2Hz,1H),8.28(t ,J=2.2Hz,1H),7.96–7.84(m,2H),7.71–7.56(m,8H),7.56–7.48(m,2H),7.45(m,4H),7.40–7.36(m,2H),7.30–7.25(m,1H).

[0070] The synthetic route of organic compound C6 is as follows:

[0071]

[0072] The synthesis of organic compound C6 is the same as that of organic compound (C4), except that the raw material (C4-a) is replaced by (C6-a), and (C4-b) is replaced by (C6-b).

[0073] The hydrogen spectrum NMR characterization data of organic compound C6 is: 1 H NMR(400MHz,Chloroform-d)δ8.98(dd,J=4.2,2.0Hz,2H),8.83–8.64(m,4H),8.48(m,2H),8 .12–7.95(m,4H),7.79(m,2H),7.69–7.60(m,3H),7.35(dd,J=6.2,1.1Hz,1H),7.22(m,2H).

[0074] The synthetic route of organic compound C13 is as follows:

[0075]

[0076] The synthesis of organic compound C13 is the same as that of organic compound (C4), except that the raw material (C4-a) is replaced by (C13-a), and (C4-b) is replaced by (C13-b).

[0077] The C13 hydrogen spectrum NMR characterization data of organic compounds are: 1 H NMR(400MHz,Chloroform-d)δ9.05(dd,J=3.9,1.7Hz,1H),8.98(dd,J=4.2,2.0Hz,2H),8.75(dd,J=8.4,1.8Hz,1H),8.68(dd,J=7.0,2.2Hz,1H),8. 62(t,J=2.2Hz,1H),8.42(dd,J=8.3,1.7Hz,1H),8.23(d,J=8.1Hz,1H),8. 00–7.88(m,5H),7.70–7.58(m,4H),7.50–7.38(m,3H),7.34–7.28(m,2H).

[0078] The synthetic route of organic compound C25 is as follows:

[0079]

[0080] The synthesis of organic compound C25 is the same as that of organic compound (C4), except that the raw material (C4-a) is replaced by (C25-a), and (C4-b) is replaced by (C25-b).

[0081] The hydrogen spectrum NMR characterization data of organic compound C25 are: 1 H NMR(400MHz,Chloroform-d)δ9.05(dd,J=3.9,1.7Hz,1H),8.98(dd,J=4.2,2.0Hz,2H),8.75(d d,J=8.4,1.8Hz,1H),8.68(dd,J=7.0,2.2Hz,1H),8.42(dd,J=8.4,1.7Hz,1H),8.23(dd,J=8.0 ,0.8Hz,1H),8.00–7.93(m,6H),7.88(d,J=7.9Hz,1H),7.83(d,J=8.6Hz,1H),7.73(d,J=2.2Hz ,1H),7.69–7.60(m,3H),7.51–7.44(m,2H),7.44–7.38(m,1H),7.33–7.28(m,2H),1.56(s,5H).

[0082] The synthetic route of organic compound C38 is as follows:

[0083]

[0084] The synthesis of organic compound C38 is the same as that of organic compound (C4), except that the raw material (C4-a) is replaced by (C38-a), (C4-b) is replaced by (C38-b), and the reaction raw material equivalent is changed to 0.5 equivalent of the original.

[0085] The hydrogen spectrum NMR characterization data of organic compound C38 are: 1 H NMR (400MHz, Chloroform-d) δ 8.80 (s, 6H), 8.14 (s, 6H), 7.96 (s, 6H), 7.72 (d, J = 70.0Hz, 10H), 7.63 (d, J = 3.4Hz, 2H), 7.39 (s, 3H).

[0086] The synthetic route of organic compound C39 is as follows:

[0087]

[0088] The synthesis of organic compound C39 is the same as that of organic compound (C4), except that the raw material (C4-a) is replaced by (C39-a), (C4-b) is replaced by (C39-b), and the reaction raw material equivalent is changed to 0.5 equivalent of the original.

[0089] The hydrogen spectrum NMR characterization data of organic compound C39 are: 1 H NMR(400MHz,Chloroform-d)δ8.98(dd,J=4.2,2.0Hz,4H),8.75(dd,J=8.4,1.8Hz,2H),8. 68(dd,J=7.0,2.2Hz,2H),8.05(s,3H),7.65(m,4H),7.50–7.38(m,7H),7.33–7.27(m,4H).

[0090] The synthetic route of organic compound C45 is as follows:

[0091]

[0092] The synthesis of compound (C45) is the same as that of organic compound (C1), except that the raw material (C4-a) is replaced by (C45-a), and (C4-b) is replaced by (C45-b).

[0093] The hydrogen spectrum NMR characterization data of organic compound C45 are: 1H NMR(400MHz,Chloroform-d),δ9.58(d,J=2.3Hz,1H),9.05(dd,J=3.9,1.7Hz,1H),8.98(dd,J=4.2,2.0Hz,2H),8 .80–8.67(m,2H),8.58–8.37(m,2H),8.27–8.09(m,3H),7.97–7.88(m,2H),7.68–7.60(m,3H),7.50–7.31(m,5H).

[0094] The synthetic route of organic compound C49 is as follows:

[0095]

[0096] The synthesis of organic compound C49 is the same as that of organic compound (C4), except that the raw material (C4-a) is replaced by (C49-a), and (C4-b) is replaced by (C49-b).

[0097] The hydrogen spectrum NMR characterization data of organic compound C49 are: 1 H NMR(400MHz,Chloroform-d), δ9.05(dd,J=3.9,1.7Hz,1H),8.98(dd,J=4.2,2.0Hz,2H),8.76(dd,J=8.4,1.8Hz,1H),8.68(dd,J=6.8,2.2Hz ,1H),8.45–8.33(m,5H),8.22(d,J=8.1Hz,1H),8.04(d,J=7.9Hz,1H), 7.95(s,2H),7.70–7.60(m,3H),7.56–7.39(m,7H),7.34–7.29(m,2H).

[0098] The synthetic route of organic compound C54 is as follows:

[0099]

[0100] The synthesis of compound (C54) is the same as that of organic compound (C4), except that the raw material (C4-a) is replaced by (C54-a), and (C4-b) is replaced by (C54-b).

[0101] The hydrogen spectrum NMR characterization data of organic compound C54 are: 1H NMR (400MHz, Chloroform-d), δ8.98 (dd, J=4.2, 2.0Hz, 2H), 8.75 (dd, J=8.4, 1.8Hz, 1H), 8.71–8.66 (m, 2H), 8. 44–8.38(m,4H),7.99(m,2H),7.75(dd,J=9.4,7.8Hz,1H),7.65(m,2H),7.55–7.39(m,9H),7.33–7.26(m,2H).

[0102] The synthetic route of organic compound C62 is as follows:

[0103]

[0104] The synthesis of organic compound C62 is the same as that of organic compound (C4), except that the raw material (C4-a) is replaced by (C62-a), and (C4-b) is replaced by (C62-b).

[0105] The hydrogen spectrum NMR characterization data of organic compound C62 are: 1 H NMR (400MHz, Chloroform-d), δ8.98 (dd, J=4.2, 2.0Hz, 2H), 8.75 (dd, J=8.4, 1.8Hz, 1H), 8.68 (dd, J=7.0, 2.2Hz, 1H), 8.21 (t, J=2.0Hz,1H),8.05(ddd,J=7.5,1.9,1.2Hz,1H),7.73–7.62(m,8H),7.60–7.52(m,3H),7.51–7.39(m,7H),7.32–7.27(m,2H).

[0106] The synthetic route of organic compound C75 is as follows:

[0107]

[0108] The synthesis of organic compound C75 is the same as that of organic compound (C4), except that the raw material (C4-a) is replaced by (C75-a), and (C4-b) is replaced by (C75-b).

[0109] The hydrogen spectrum NMR characterization data of organic compound C75 are: 1H NMR (400MHz, Chloroform-d), δ8.98 (dd, J=4.2, 2.0Hz, 2H), 8.80–8.73 (m, 3H), 8.73–8.66 (m, 3H), 8.62 (dd, J=8.3, 1.4Hz,2H),8.02–7.95(m,2H),7.78(m,2H),7.71–7.60(m,8H),7.51–7.38(m,3H),7.34–7.28(m,2H),7.22(m,2H).

[0110] The organic compound of the present application is used to prepare an organic electroluminescent device.

[0111] Figure 1 Schematic diagram of the structure of the organic electroluminescent device in the embodiment of the present application. Figure 1 1 represents an anode, 2 represents a first hole injection layer, 3 represents a first hole transport layer, 4 represents a first electron blocking layer, 5 represents a first light-emitting layer, 6 represents a first electron transport layer, 7 represents an N-type charge generation layer, 8 represents a P-type charge generation layer, 9 represents a second hole transport layer, 10 represents a second electron blocking layer, 11 represents a second light-emitting layer, 12 represents a second electron transport layer, 13 represents a second electron injection layer, and 14 represents a cathode.

[0112] An organic electroluminescent device with a positive structure is used as a specific embodiment. First, a transparent conductive ITO glass substrate (as an anode) is washed with deionized water, ethanol, acetone, and deionized water in sequence, dried at 80°C, treated with oxygen plasma for 30 minutes, and then placed in a vacuum evaporator at a temperature of <4*10 -4 Under the conditions of Pa, the first hole injection layer (20nm HAT-CN), the first hole transport layer (10nm HTL), the first electron blocking layer (5nm EBL), the first light-emitting layer (20nm BH:BD, the mass ratio of BH to BD is 97:3), the first electron transport layer (35nm ET:LiQ, 50%), the N-type charge generation layer (10nm n-CGL), the P-type charge generation layer (10nm HAT-CN), the second hole transport layer (10nm HTL), the second electron blocking layer (5nm EBL), the second light-emitting layer (20nm BH:BD, the mass ratio of BH to BD is 97:3), the second electron transport layer (35nm ET:LiQ, the mass ratio of ET to LiQ is 50:50), the second electron injection layer (1nm Yb), and the cathode (1000nm Ag) are sequentially deposited. Among them, n-CGL is a mixture of the organic compound of the present application and ytterbium, and the mass fraction of ytterbium is 5%.

[0113] The material structure used in the above-mentioned organic electroluminescent device is as follows:

[0114]

[0115]

[0116] The organic electroluminescent devices of Examples 1-11 and Comparative Examples 1-3 are prepared by the above method, the difference being that the organic compounds of the present application in n-CGL are organic compound C4, organic compound C6, organic compound C13, organic compound C25, organic compound C39, organic compound C45, organic compound C49, organic compound C54, organic compound C62, organic compound C75, organic compound C38, comparison compound 1, comparison compound 2, and comparison compound 3, respectively.

[0117] The above organic electroluminescent device was measured at 10 mA / cm 2 The electrical and optical properties at 50 mA / cm 2 The device life under the condition is as shown in Table 1 (the voltage, current efficiency, and T90 life values ​​in Table 1 are expressed in percentages, which are based on the voltage, current efficiency, and T90 life corresponding to Comparative Example 1, and are used to measure the voltage, current efficiency, and T90 life of other embodiments or comparative examples. Taking the voltage of 95%, the current efficiency of 103%, and the T90 life of 150% of Example 4 as an example, it means that the voltage of the organic electroluminescent device of Example 4 under the same test conditions is only 95% of that of Comparative Example 1, the current efficiency is 103% of that of Comparative Example 1, and the T90 life is 150% of that of Comparative Example 1).

[0118] Table 1

[0119]

[0120]

[0121] It can be seen from Table 1 that the voltage of the organic electroluminescent device prepared by using the organic compound of the present application as a component of n-CGL is significantly lower than that of the comparative example, thereby reducing the power consumption of the device and improving the device life.

Claims

1. An organic compound, characterized in that Its general structural formula is shown in formula (A): Wherein, L1-L4 are independently selected from a single bond, an R-substituted or unsubstituted arylene group having 6 to 60 ring carbon atoms, and an R-substituted or unsubstituted heteroarylene group having 2 to 60 ring carbon atoms; Ar1-Ar4 are independently selected from R substituted or unsubstituted C6 to C60 aryl, R substituted or unsubstituted C3 to C60 heteroaryl, R substituted or unsubstituted C6-C30 arylphosphinoyl; The R is selected from at least one of a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a deuterium group, a cyano group, a nitro group, a hydrazine group, a sulfonic acid group, a C1 to C20 alkylsilyl group, a C1 to C20 alkoxysilyl group, a C3 to C30 cycloalkylsilyl group, a C6 to C30 arylsilyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C3 to C30 heteroaryl group, a C1 to C20 alkylamino group, and an unsubstituted amine group; The substitution in R is substituted by at least one of halogen, C1-C4 alkyl, deuterium, C6 to C30 aryl and C3 to C30 heteroaryl; m1-m4, n1-n2 are independently selected from integers of 0-3; The heteroatoms in the heteroarylene group and the heteroaryl group are oxygen or nitrogen family elements; The organic compound is not Among them, R a It is H, F, C1-C4 alkyl, methoxy, phenoxy or -N(CH3)2.

2. The organic compound according to claim 1, characterized in that L1-L4 are independently selected from a single bond, an R-substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, and an R-substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms; and / or, Ar1-Ar4 are independently selected from R substituted or unsubstituted C6 to C30 aryl, R substituted or unsubstituted C3 to C30 heteroaryl, R substituted or unsubstituted C6-C20 arylphosphinoyl; And / or, R is selected from at least one of a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C1 to C10 alkoxy group, a cyano group, a nitro group, a hydrazino group, a sulfonic acid group, a C1 to C10 alkylsilyl group, a C1 to C10 alkoxysilyl group, a C3 to C20 cycloalkylsilyl group, a C6 to C20 arylsilyl group, a substituted or unsubstituted C6 to C20 aryl group, a substituted or unsubstituted C3 to C20 heteroaryl group, a C1 to C10 alkylamine group and an unsubstituted amine group.

3. The organic compound according to claim 1 or 2, characterized in that Formula (A) is represented by the following formula (B): In formula (B), m1, m2, L1, L2 and Ar1, Ar2 are the same as defined in formula (A).

4. The organic compound according to claim 1, characterized in that L1-L4 is a single bond or one or a combination of the following structures:

5. The organic compound according to claim 1, characterized in that Ar1 and Ar2 are independently selected from R substituted or unsubstituted C6 to C20 aryl, R substituted or unsubstituted C3 to C20 heteroaryl, R substituted or unsubstituted C6 to C20 arylphosphinoyl, wherein R is selected from at least one of substituted or unsubstituted C1 to C10 alkyl, substituted or unsubstituted C1 to C10 alkoxy, halogen, cyano, substituted or unsubstituted C6 to C10 aryl, substituted or unsubstituted C3 to C10 heteroaryl, C1 to C20 alkylamine and unsubstituted amine.

6. The organic compound according to claim 1, characterized in that Ar1-Ar4 is at least one of the following structures:

7. The organic compound according to claim 1, characterized in that The heteroaryl group is a group containing one or more SP 2 Hybridized nitrogen atoms.

8. The organic compound according to claim 1, characterized in that The structure of the organic compound is one of the following structural formulas:

9. An organic electroluminescent device, characterized in that: It includes: anode; a first light emitting stack disposed on the anode; a charge generation layer disposed on the first light-emitting stack, the charge generation layer comprising the organic compound according to any one of claims 1 to 8; a second light emitting stack disposed on the charge generation layer; and a cathode disposed on the second light emitting stack.

10. The organic electroluminescent device according to claim 9, characterized in that: The charge generation layer comprises an N-type charge generation layer and a P-type charge generation layer which are stacked, and the organic compound is located in the N-type charge generation layer; And / or, the first light-emitting stack includes a first hole transport layer, a first light-emitting layer, and a first electron transport layer that are stacked, and the first hole transport layer is close to the anode; the second light-emitting stack includes a second hole transport layer, a second light-emitting layer, and a second electron transport layer that are stacked, and the second hole transport layer is close to the first electron transport layer.

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