Organic light-emitting device and electronic assembly thereof

Abstract

Disclosed are an organic electroluminescent device and an electronic component thereof. The organic electroluminescent device includes an anode, a cathode, and a light-emitting layer disposed between the anode and the cathode, and a first organic layer and a second organic layer disposed between the anode and the light-emitting layer, the first organic layer including at least a first compound having a structure of Formula 1 or Formula 2, the second organic layer including a second compound having a structure of Formula 1, the first compound and the second compound have different structures from each other. The first organic layer and the second organic layer respectively comprising the first compound and the second compound with specific structures can be used as an electron blocking layer or a hole transport layer in the electroluminescent device, and preferably, the first organic layer and the second organic layer can be used as the electron blocking layer, so that the organic electroluminescent device has more excellent device performance, and the device performance is improved. In particular, the capacitor has a longer life and / or a lower capacitance. The invention also discloses an electronic assembly comprising the organic electroluminescent device.

Description

Technical Field

[0001] The present invention relates to an organic electronic device, in particular, to an organic electroluminescent device comprising a first compound having a structure of Formula 1 or Formula 2 in a first organic layer and a second compound having a structure of Formula 1 in a second organic layer, and an electronic component comprising the organic electroluminescent device. Background Art

[0002] Organic electroluminescent devices (OLEDs) are stacked with a cathode, an anode, and a series of organic light-emitting materials between the cathode and the anode. They can convert electrical energy into light by applying voltage across the cathode and anode of the device, and have the advantages of wide angle, high contrast, and faster response time. Tang and Van Slyke of Eastman Kodak reported an organic light-emitting device in 1987, which included an arylamine hole transport layer and a tri-8-hydroxyquinoline-aluminum layer as an electron transport layer and a light-emitting layer (Applied Physics Letters, 1987, 51 (12): 913-915). After applying voltage across the device, green light is emitted from the device. This invention laid the foundation for the development of modern organic light-emitting diodes (OLEDs).

[0003] Due to the advantages of low cost, low power consumption, high brightness, wide viewing angle and thin thickness, OLED has been widely used in the display and lighting fields after decades of development. With the development of the OLED industry, lower voltage, higher efficiency and longer life have also become the goals that people in the field are constantly pursuing. In addition, the capacitance of the device, as a key factor affecting the response time and refresh rate of OLED display devices at low grayscale, has also become one of the performance parameters that industry insiders focus on.

[0004] From the perspective of electronics, the display principle of OLED is briefly described as follows: under the action of an external electric field greater than a certain threshold, holes and electrons are injected into the light-emitting layer from the anode and cathode in the form of current, and the holes and electrons combine in the light-emitting layer to form excitons, which undergo radiative recombination and cause light emission. Therefore, for OLED devices, the carrier balance inside the light-emitting layer has an important influence on the formation of excitons and the luminous efficiency, and carrier balance can reduce the device capacitance. Therefore, how to further balance the carriers in the device has also become one of the key research topics for researchers in the field.

[0005] At present, the structure of commercial OLED devices usually includes: cathode, anode, and a series of organic functional layers arranged between the cathode and anode, such as: hole injection layer (HIL), hole transport layer (HTL), electron blocking layer (EBL), light-emitting layer (EML), hole blocking layer (HBL), electron transport layer (ETL) and electron injection layer (EIL). Among them, HIL is usually composed of hole transport material (HTM) doped with a low proportion of p-type conductive doping material (PD), and its doping ratio is generally between 1 and 3%. HTL is usually composed of HTM used in HIL. The electron blocking layer is generally also composed of hole transport material, which usually has excellent hole transport ability, thereby reducing the driving voltage of the device, but excessive hole injection and transport will cause carrier imbalance in the device, thereby reducing the device life. Therefore, the setting and material selection of HIL, HTL, and EBL between the anode and the light-emitting layer have a crucial influence on balancing carriers.

[0006] At present, in order to obtain devices with better comprehensive performance in this field, common improvement methods include: developing new device structures or developing new compounds with better performance. In addition, the combination of different materials in different organic layers of the device also has an important impact on its performance. The combination of materials with better matching performance can balance the carriers in the device and is more conducive to the transfer of charges. Therefore, it is also crucial to pay attention to the matching and interaction between organic materials in different organic layers and to develop new material combinations that can be applied to specific organic functional layers.

[0007] KR20170100698A discloses a method having The invention discloses compounds of a general structure and their application as hole transport layer materials of devices. However, the application does not disclose or teach the technical effects that can be achieved when such compounds are used in combination with other silylene-linked aromatic amine compounds or fluorene-linked aromatic amine compounds with different structures in different functional layers of the device. In particular, the application does not focus on the effect of the combination of materials in different organic layers on the device capacitance.

[0008] In order to improve the efficiency and life of OLED devices, reduce device voltage and capacitance, and obtain better device performance, in addition to developing new organic materials with better performance, developing new device structures and selecting more performance-matched compounds to combine and apply to different functional layers of the device to obtain better overall performance are also technical issues that researchers in this field need to solve urgently. Summary of the invention

[0009] The present invention aims to provide a series of novel organic electroluminescent devices to solve at least some of the above problems. The novel organic electroluminescent device comprises an anode, a cathode and a light-emitting layer arranged between the anode and the cathode, and a first organic layer and a second organic layer arranged between the anode and the light-emitting layer, wherein the first organic layer at least comprises a first compound having a structure of Formula 1 or Formula 2, and the second organic layer comprises a second compound having a structure of Formula 1, and the first compound and the second compound have different structures from each other. The first organic layer and the second organic layer of the present invention, which respectively comprise the first and second compounds having specific structures, can be used as electron blocking layers or hole transport layers in electroluminescent devices. Preferably, they are used as electron blocking layers, which can make the organic electroluminescent device have better device performance, especially longer life and / or lower capacitance.

[0010] According to one embodiment of the present invention, an organic electroluminescent device is disclosed, comprising:

[0011] anode,

[0012] cathode,

[0013] A light-emitting layer is provided between the anode and the cathode,

[0014] A first organic layer and a second organic layer disposed between the anode and the light-emitting layer;

[0015] wherein the first organic layer comprises a first compound, and the second organic layer comprises a second compound;

[0016] wherein the first compound has a structure represented by Formula 1 or Formula 2, and the second compound has a structure represented by Formula 1; the first compound and the second compound have different structures from each other;

[0017] in,

[0018]

[0019] In Formula 1, Ar1 has a structure represented by Formula 1-a or Formula 1-a':

[0020]

[0021] A r1 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;

[0022] X1 is selected from CR in the same or different way each time it appears a or N;

[0023] Q1 is selected, identically or differently, at each occurrence from C or Si;

[0024] Y1 is selected from C, CR, or b or N;

[0025] L1, L1', L1", L1'' are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;

[0026] R1, R1', R a , R b The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0027] Adjacent substituents R1, R1', R a , R b can optionally be linked to form a ring;

[0028] represents the position where the formula 1-a or formula 1-a' is connected to the L1' in formula 1;

[0029]

[0030] In Formula 2, Ar2 has a structure represented by Formula 2-a or Formula 2-a':

[0031]

[0032] A r2' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;

[0033] X2 is selected from CR in the same or different way each time it appears c or N;

[0034] Y2 is selected from C, CR, or the like at each occurrence d or N;

[0035] Q2 is selected, at each occurrence, identically or differently, from C or Si;

[0036] L2, L2', L2", L2'', each occurrence of which is identical or different, is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;

[0037] R2, R2', R c , R d The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0038] Adjacent substituents R2, R2', R c , R d can optionally be linked to form a ring;

[0039] It represents the position where the formula 2-a or formula 2-a' is connected to the L2' in formula 2.

[0040] According to another embodiment of the present invention, an electronic component is disclosed, which includes the organic electroluminescent device described in the above embodiment.

[0041] The novel organic electroluminescent device disclosed in the present invention provides more space for regulating and balancing the carriers in the device by introducing compounds of Formula 1 or Formula 2 having a specific skeleton into at least two organic layers between the anode and the light-emitting layer of the device. For example, not only can compounds of Formula 1 or Formula 2 with different structures be selected to form an effective energy level match, but preferably, HOMO 第一化合物 >HOMO 第二化合物 ; You can further select compounds of formula 1 or formula 2 with a specific relationship in hole mobility and apply them to the first organic layer and the second organic layer respectively to form a gradient setting of hole mobility. Preferably, the hole mobility of the first organic layer is greater than that of the second organic layer, so as to further improve the charge transfer effect in the device and obtain better overall device performance, especially to achieve a significant reduction in capacitance and / or a significant increase in lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of a conventional OLED device structure.

[0043] Figure 2 It is a schematic diagram of the structure of an OLED device according to an embodiment of the present invention.

[0044] Figure 3 It is a schematic diagram of the HOD device structure of the present invention.

[0045] Figure 4 It is a schematic diagram of the capacitance-voltage (CV) characteristic curve of an electroluminescent device. DETAILED DESCRIPTION

[0046] OLED devices typically include an anode layer, a hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer (EBL), an emissive layer (EML), a hole blocking layer (HBL), an electron transport layer (ETL), an electron injection layer (EIL), a cathode layer, and a capping layer, each of which has more examples. For example, a flexible and transparent substrate-anode combination is disclosed in U.S. Patent No. 5,844,363, which is incorporated by reference in its entirety. An example of a p-doped hole transport layer is m-MTDATA doped with F4-TCNQ at a molar ratio of 50:1, as disclosed in U.S. Patent Application Publication No. 2003 / 0230980, which is incorporated by reference in its entirety. Examples of host materials are disclosed in U.S. Patent No. 6,303,238 to Thompson et al., which is incorporated by reference in its entirety. An example of an n-doped electron transport layer is BPhen doped with Li at a molar ratio of 1:1, as disclosed in U.S. Patent Application Publication No. 2003 / 0230980, which is incorporated by reference in its entirety. U.S. Patent Nos. 5,703,436 and 5,707,745, which are incorporated by reference in their entirety, disclose examples of cathodes including composite cathodes having a thin layer of a metal such as Mg:Ag with an overlying transparent, conductive, sputter-deposited ITO layer. The principles and use of barrier layers are described in more detail in U.S. Patent No. 6,097,147 and U.S. Patent Application Publication No. 2003 / 0230980, which are incorporated by reference in their entirety. An example of an injection layer is provided in U.S. Patent Application Publication No. 2004 / 0174116, which is incorporated by reference in its entirety. Descriptions and examples of protective layers in U.S. Patent Application Publication No. 2004 / 0174116, which is incorporated by reference in its entirety.

[0047] The above-mentioned various layer structures are provided by way of non-limiting examples. The functions of the OLED can be achieved by combining the various layers described above, or some layers can be omitted completely. It can also include other layers that are not explicitly described. In each layer, a single material or a combination or mixture of multiple materials can be used to achieve optimal performance. Any functional layer can include several sublayers. For example, the light-emitting layer can have two layers of different light-emitting materials to achieve a desired light-emitting spectrum.

[0048] In one embodiment, an OLED may be described as having an "organic layer" disposed between a cathode and an anode. The organic layer may include one or more layers.

[0049] Devices manufactured according to embodiments of the present invention can be incorporated into various consumer products with one or more electronic component modules (or units) of the device. Some examples of these consumer products include flat panel displays, monitors, medical monitors, televisions, billboards, lights for indoor or outdoor lighting and / or signaling, head-up displays, fully or partially transparent displays, flexible displays, smart phones, tablet computers, tablet phones, wearable devices, smart watches, laptop computers, digital cameras, portable cameras, viewfinders, micro displays, 3-D displays, vehicle displays and taillights. The materials and structures described herein can also be used in other organic electronic devices listed above.

[0050] As used herein, "top" means farthest from the substrate, while "bottom" means closest to the substrate. In the case where the first layer is described as being "disposed" "on" the second layer, the first layer is disposed farther from the substrate. Unless it is specified that the first layer is "in contact with" the second layer, other layers may exist between the first and second layers. For example, even if various organic layers exist between the cathode and the anode, the cathode may still be described as being "disposed on" the anode. For example, in this article, "the second organic layer is disposed on the first organic layer", which means that the second organic layer is disposed on the side of the first organic layer away from the anode. In this case, there may be other layers between the second organic layer and the first organic layer, and of course the second organic layer may also be in direct contact with the first organic layer. In one embodiment of the present invention, it is preferred that the hole mobility of the first organic layer is greater than the hole mobility of the second organic layer.

[0051] As used herein, unless otherwise specified, "capacitance" refers to the maximum internal capacitance of a device, also known as the maximum capacitance. "Maximum capacitance" refers to the peak value that the device capacitance can reach as the test voltage increases at a specific frequency, such as Figure 4 Generally, the display industry pays more attention to the capacitance of OLED devices in the range of 100-1000 Hz, and the capacitance data under 500 Hz is the most commonly used. Therefore, the device capacitance measured in the device embodiments of this article is the capacitance under 500 Hz.

[0052] As described herein, "luminescent area" refers to the area in the direction perpendicular to the luminescent surface of an organic electroluminescent device where the anode is in direct contact with the organic layer and the organic layer is in direct contact with the cathode. Herein, the luminescent area of ​​the devices in the embodiments and comparative examples is 0.04 cm 2 .

[0053] As used herein, "solution processable" means capable of being dissolved, dispersed or transported in and / or deposited from a liquid medium in the form of a solution or suspension.

[0054] A typical bottom-emitting OLED device structure is as follows: Figure 1 As shown. Among them, the OLED device 100 includes an anode layer 101, a hole injection layer (HIL) 102, a hole transport layer (HTL) 103, an electron blocking layer (EBL) 104, which can also be called a prime layer, a light-emitting layer (EML) 105, and a hole blocking layer (HBL) 106. The hole blocking layer 106 is an optional layer. Electron transport layer (ETL) 107, electron injection layer (EIL) 108, cathode layer 109. The OLED device 100 may further include a capping layer 110 (not shown in the figure). Among them, the anode 101 can be selected from materials with high work function, such as high-transmittance ITO (indium selenium oxide), IZO (indium zinc oxide), tin oxide (SnO2) zinc oxide (ZnO), etc., and its average transmittance in the visible light range is greater than 85%. The hole injection layer 102 can be a single material layer, such as the commonly used HATCN; the hole injection layer 102 can also be a hole transport material doped with a certain proportion of p-type conductive doping material, usually the doping ratio is not higher than 5%, and the commonly used ratio is between 1% and 3%. This hole injection layer doped with p-type conductive material usually has a lower voltage than a single material layer, so it is widely used. The hole injection layer can be formed on the anode 101 by various suitable methods, such as vacuum evaporation, solution method, laser transfer, etc. When the vacuum evaporation method is used, the evaporation conditions can be changed according to the structure and thermal properties of the material used to form the hole injection layer 102. For example, the evaporation conditions include an evaporation temperature of 100-500°C, 10 -8 Up to 10 -3 torr vacuum pressure and about to When the hole injection layer is formed by a solution method, the coating conditions may vary depending on the material and structure used to form the hole injection layer 102. For example, if the material is solution processable, the spin coating rate may be 1000r-5000r / min, and the heat treatment temperature for removing the solvent after spin coating may be 80°C-300°C, but the coating conditions are not limited thereto. The thickness of the hole injection layer may have a thickness of to Then, a hole transport layer 103 and an electron blocking layer 104 may be formed on the hole injection layer 102. The hole transport layer 103 and the electron blocking layer 104 are usually made of hole transport materials. The total thickness of the hole transport layer and the electron blocking layer may be to The thickness of the electron blocking layer is generally 2%-50% of the total thickness. This generally ensures good hole transport properties without increasing the driving voltage. The light-emitting layer 105 may include a host and a dopant (e.g., a phosphorescent host material, a phosphorescent luminescent dopant material; or a fluorescent host material, a fluorescent luminescent dopant material). The dopant generally accounts for 0.1%-20% of the total weight of the light-emitting layer. The total thickness of the light-emitting layer may be In certain embodiments, it may be When the thickness of the light-emitting layer is within these ranges, the device performance is better. In order to reduce or prevent the diffusion of excitons or holes to the electron transport layer (ETL) 107, a hole blocking layer (HBL) 106 can be formed between the light-emitting layer and the ETL by vacuum evaporation, solution method or laser transfer. The thickness of the HBL can be to In some embodiments, the thickness of the HBL may be The HBL can effectively block holes without increasing the device voltage. Then, the ETL 107 can be formed on the HBL by any suitable method. The thickness of 107 can be In some embodiments, it can be to When the ETL is within this thickness range, the ETL has a satisfactory electron transport capability without increasing the voltage of the device. Then, an electron injection layer EIL 108 may be formed on the ETL. Non-limiting examples of materials for forming the EIL include Liq, LiF, etc. The deposition or coating process for forming the EIL is similar to that of the HIL. The thickness of the EIL may be 200 Å. In some embodiments, it can be When the EIL is in this thickness range, the EIL has a satisfactory electron injection capability. Then a cathode 109 can be set on the EIL, and the metal used to form the cathode 109 can be a metal, alloy, conductive compound or a mixture thereof with a low work function. In some embodiments, the cathode 109 can be formed as a thin film of Li, Mg, Al, Ca, Yb, Mg-Ag, etc. An encapsulation layer can also be included on the cathode 109 to prevent harmful substances from the environment, such as moisture and oxygen. Any material that can provide an encapsulation function can be used as an encapsulation layer, such as glass or an organic-inorganic hybrid layer. The encapsulation layer should be placed directly or indirectly on the outside of the OLED device. Multilayer thin film encapsulation is described in U.S. Patent No. 7,968,146B2, the entire contents of which are incorporated herein by reference.

[0055] Although the above reference Figure 1 A method of manufacturing an organic light-emitting device according to an exemplary embodiment is described, but the embodiment is not limited to having Figure 1 Organic light-emitting device with structure.

[0056] As used herein, "hole only device (HOD)" refers to a device that allows holes to flow from the anode but does not allow electrons to flow from the cathode. A HOD device generally includes a substrate, an anode, a hole injection layer, a hole transport layer, an electron blocking layer, and a cathode. The hole injection layer is used to promote the injection of holes from the anode into the organic layer to be tested, and the electron blocking layer is used to block the injection of electrons from the cathode into the hole transport layer. Generally, in a HOD device, the material used for the electron blocking layer can be consistent with the material used for the hole injection layer, or other suitable electron blocking layer materials can be used. The specific structure of the HOD device used in the test method for measuring the hole mobility of a compound in this application is as follows: Figure 3 The specific preparation method is shown below.

[0057] In this paper, the value of HOMO energy level (highest occupied orbital) is measured by electrochemical cyclic voltammetry, which is the most commonly used method for determining the energy level of organic materials. The test uses an electrochemical workstation model CorrTest CS120 produced by Wuhan Kosit Instrument Co., Ltd. and a three-electrode working system: a platinum disk electrode as the working electrode, an Ag / AgNO3 electrode as the reference electrode, and a platinum wire electrode as the auxiliary electrode. Anhydrous DCM is used as the solvent and 0.1 mol / L tetrabutylammonium hexafluorophosphate is used as the supporting electrolyte. The compound to be tested is mixed with 10 -3 mol / L solution, nitrogen was passed into the solution for 10 min to remove oxygen before testing. Instrument parameter settings: scanning rate of 100 mV / s, potential interval of 0.5 mV, test window of -1 V to 1 V. The HOMO energy levels of some compounds used in the device examples of the present invention were measured using the above method, and the results are listed in Table 1 below.

[0058] In this application, the expression that the energy level is less than a certain number means that the energy level is smaller than this number in value, that is, has a more negative value.

[0059] Definition of Substituent Terms

[0060] Halogen or halide - as used herein includes fluorine, chlorine, bromine and iodine.

[0061] Alkyl - as used herein, includes straight chain and branched alkyl groups. The alkyl group may be an alkyl group having 1 to 20 carbon atoms, preferably an alkyl group having 1 to 12 carbon atoms, and more preferably an alkyl group having 1 to 6 carbon atoms. Examples of alkyl groups include methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, neopentyl, 1-methylpentyl, 2-methylpentyl, 1-pentylhexyl, 1-butylpentyl, 1-heptyloctyl, 3-methylpentyl. Among the above, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, neopentyl and n-hexyl are preferred. In addition, the alkyl group may be optionally substituted.

[0062] Cycloalkyl - as used herein, includes cyclic alkyl. Cycloalkyl can be a cycloalkyl having 3 to 20 ring carbon atoms, preferably a cycloalkyl having 4 to 10 carbon atoms. Examples of cycloalkyl include cyclobutyl, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4,4-dimethylcyclohexyl, 1-adamantyl, 2-adamantyl, 1-norbornyl, 2-norbornyl, etc. Among the above, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4,4-dimethylcyclohexyl are preferred. In addition, cycloalkyl can be optionally substituted.

[0063] Heteroalkyl - As used herein, a heteroalkyl group comprises one or more carbons in an alkyl chain substituted with a heteroatom selected from the group consisting of a nitrogen atom, an oxygen atom, a sulfur atom, a selenium atom, a phosphorus atom, a silicon atom, a germanium atom and a boron atom. The heteroalkyl group may be a heteroalkyl group having 1 to 20 carbon atoms, preferably a heteroalkyl group having 1 to 10 carbon atoms, and more preferably a heteroalkyl group having 1 to 6 carbon atoms. Examples of heteroalkyl include methoxymethyl, ethoxymethyl, ethoxyethyl, methylthiomethyl, ethylthiomethyl, ethylthioethyl, methoxymethoxymethyl, ethoxymethoxymethyl, ethoxyethoxyethyl, hydroxymethyl, hydroxyethyl, hydroxypropyl, mercaptomethyl, mercaptoethyl, mercaptopropyl, aminomethyl, aminoethyl, aminopropyl, dimethylaminomethyl, trimethylgermanylmethyl, trimethylgermanylethyl, trimethylgermanylisopropyl, dimethylethylgermanylmethyl, dimethylisopropylgermanylmethyl, tert-butyldimethylgermanylmethyl, triethylgermanylmethyl, triethylgermanylethyl, triisopropylgermanylmethyl, triisopropylgermanylethyl, trimethylsilylmethyl, trimethylsilylethyl, trimethylsilylisopropyl, triisopropylsilylmethyl, triisopropylsilylethyl. In addition, heteroalkyl may be optionally substituted.

[0064] Alkenyl - as used herein, encompasses straight chain, branched and cyclic olefin groups. Alkenyl can be an alkenyl containing 2 to 20 carbon atoms, preferably an alkenyl having 2 to 10 carbon atoms. Examples of alkenyl include vinyl, propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1,3-butadienyl, 1-methylvinyl, styryl, 2,2-diphenylvinyl, 1,2-diphenylvinyl, 1-methylallyl, 1,1-dimethylallyl, 2-methylallyl, 1-phenylallyl, 2-phenylallyl, 3-phenylallyl, 3,3-diphenylallyl, 1,2-dimethylallyl, 1-phenyl-1-butenyl, 3-phenyl-1-butenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cycloheptenyl, cycloheptatrienyl, cyclooctenyl, cyclooctatetraenyl and norbornenyl. Additionally, alkenyl groups may be optionally substituted.

[0065] Alkynyl - as used herein, encompasses straight chain alkynyl. Alkynyl may be an alkynyl containing 2 to 20 carbon atoms, preferably an alkynyl having 2 to 10 carbon atoms. Examples of alkynyl include ethynyl, propynyl, propargyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, 2-pentynyl, 3,3-dimethyl-1-butynyl, 3-ethyl-3-methyl-1-pentynyl, 3,3-diisopropyl-1-pentynyl, phenylethynyl, phenylpropynyl, etc. Among the above, ethynyl, propynyl, propargyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, phenylethynyl, etc. are preferred. In addition, alkynyl may be optionally substituted.

[0066] Aryl or aromatic group - As used herein, both non-fused and fused systems are contemplated. The aryl group may be an aryl group having 6 to 30 carbon atoms, preferably an aryl group having 6 to 20 carbon atoms, and more preferably an aryl group having 6 to 12 carbon atoms. Examples of aryl groups include phenyl, biphenyl, terphenyl, triphenylene, tetraphenylene, naphthalene, anthracene, phenanthrene, fluorene, pyrene, Perylene and azulene, preferably phenyl, biphenyl, terphenyl, triphenylene, fluorene and naphthalene. Examples of non-condensed aryl groups include phenyl, biphenyl-2-yl, biphenyl-3-yl, biphenyl-4-yl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-terphenyl-2-yl, m-terphenyl-4-yl, m-terphenyl-3-yl, m-terphenyl-2-yl, o-tolyl, m-tolyl, p-tolyl, p-(2-phenylpropyl)phenyl, 4'-methylbiphenyl, 4"-tert-butyl-p-terphenyl-4-yl, o-cumyl, m-cumyl, p-cumyl, 2,3-xylyl, 3,4-xylyl, 2,5-xylyl, mesityl and m-quadrenyl. In addition, the aryl group may be optionally substituted.

[0067] Heterocyclic or heterocyclic - as used herein, non-aromatic cyclic groups are contemplated. Non-aromatic heterocyclic groups include saturated heterocyclic groups having 3-20 ring atoms and unsaturated non-aromatic heterocyclic groups having 3-20 ring atoms, wherein at least one ring atom is selected from the group consisting of nitrogen atoms, oxygen atoms, sulfur atoms, selenium atoms, silicon atoms, phosphorus atoms, germanium atoms and boron atoms, and preferred non-aromatic heterocyclic groups are those having 3 to 7 ring atoms, including at least one heteroatom such as nitrogen, oxygen, silicon or sulfur. Examples of non-aromatic heterocyclic groups include oxirane, oxetanyl, tetrahydrofuranyl, tetrahydropyranyl, dioxopentanyl, dioxanyl, aziridinyl, dihydropyrrolyl, tetrahydropyrrolyl, piperidinyl, oxazolidinyl, morpholinyl, piperazinyl, oxepinyl, thiepinyl, azepine and tetrahydrothioxolyl. Additionally, the heterocyclyl group may be optionally substituted.

[0068] Heteroaryl - As used herein, non-fused and fused heteroaromatic groups may contain 1 to 5 heteroatoms, wherein at least one heteroatom is selected from the group consisting of nitrogen, oxygen, sulfur, selenium, silicon, phosphorus, germanium and boron atoms. Heteroaryl also refers to heteroaryl. The heteroaryl may be a heteroaryl having 3 to 30 carbon atoms, preferably a heteroaryl having 3 to 20 carbon atoms, and more preferably a heteroaryl having 3 to 12 carbon atoms. Suitable heteroaryl groups include dibenzothiophene, dibenzofuran, dibenzoselenophene, furan, thiophene, benzofuran, benzothiophene, benzoselenophene, carbazole, indole, carbazole, pyridine, indole, pyrrolopyridine, pyrazole, imidazole, triazole, oxazole, thiazole, oxadiazole, oxatriazole, dioxazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazine, oxathiazine, oxadiazine, indole, benzimidazole, indazole, indenozine, benzoxazole, benzisoxazole, benzothiazole, quinoline, isoquinoline, In some embodiments, the heteroaryl group is substituted with 1,2-azaborine, 1,3-azaborine, 1,4-azaborine, borazole and its aza analogs. In some embodiments, the heteroaryl group is substituted with 1,2-azaborine, 1,3-azaborine, 1,4-azaborine, borazole and its aza analogs. In some embodiments, the heteroaryl group is substituted with 1,2-azaborine, 1,3-azaborine, 1,4-azaborine, borazole and its aza analogs. In addition, the heteroaryl group may be optionally substituted.

[0069] Alkoxy-as used herein, represented by -O-alkyl, -O-cycloalkyl, -O-heteroalkyl or -O-heterocyclyl. Examples and preferred examples of alkyl, cycloalkyl, heteroalkyl and heterocyclyl are the same as described above. Alkoxy can be an alkoxy having 1 to 20 carbon atoms, preferably an alkoxy having 1 to 6 carbon atoms. Examples of alkoxy include methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, cyclopropyloxy, cyclobutyloxy, cyclopentyloxy, cyclohexyloxy, tetrahydrofuranyloxy, tetrahydropyranyloxy, methoxypropyloxy, ethoxyethyloxy, methoxymethyloxy and ethoxymethyloxy. In addition, alkoxy can be optionally substituted.

[0070] Aryloxy - as used herein, represented by -O-aryl or -O-heteroaryl. Examples and preferred examples of aryl and heteroaryl are the same as above. Aryloxy can be an aryloxy having 6 to 30 carbon atoms, preferably an aryloxy having 6 to 20 carbon atoms. Examples of aryloxy include phenoxy and biphenyloxy. In addition, aryloxy can be optionally substituted.

[0071] Aralkyl - as used herein, encompasses aryl-substituted alkyl groups. Aralkyl groups may be aralkyl groups having 7 to 30 carbon atoms, preferably aralkyl groups having 7 to 20 carbon atoms, and more preferably aralkyl groups having 7 to 13 carbon atoms. Examples of aralkyl groups include benzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, 2-phenylisopropyl, phenyl tert-butyl, α-naphthylmethyl, 1-α-naphthyl-ethyl, 2-α-naphthylethyl, 1-α-naphthylisopropyl, 2-α-naphthylisopropyl, β-naphthylmethyl, 1-β-naphthyl-ethyl, 2-β-naphthyl-ethyl, 1-β-naphthylisopropyl, 2-β-naphthylisopropyl, p-methylbenzyl, m-methylbenzyl, substituted alkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl,

[0072] Alkylsilyl - As used herein, alkyl substituted silicon groups are contemplated. The alkylsilyl group may be an alkylsilyl group having 3-20 carbon atoms, preferably an alkylsilyl group having 3 to 10 carbon atoms. Examples of alkylsilyl groups include trimethylsilyl, triethylsilyl, methyldiethylsilyl, ethyldimethylsilyl, tripropylsilyl, tributylsilyl, triisopropylsilyl, methyldiisopropylsilyl, dimethylisopropylsilyl, tri-tert-butylsilyl, triisobutylsilyl, dimethyltert-butylsilyl, methyldi-tert-butylsilyl. In addition, the alkylsilyl group may be optionally substituted.

[0073] Arylsilyl - as used herein, encompasses at least one aryl-substituted silicon group. The arylsilyl group may be an arylsilyl group having 6 to 30 carbon atoms, preferably an arylsilyl group having 8 to 20 carbon atoms. Examples of arylsilyl groups include triphenylsilyl, phenyldiphenylsilyl, diphenylbiphenylsilyl, phenyldiethylsilyl, diphenylethylsilyl, phenyldimethylsilyl, diphenylmethylsilyl, phenyldiisopropylsilyl, diphenylisopropylsilyl, diphenylbutylsilyl, diphenylisobutylsilyl, diphenyltert-butylsilyl. In addition, the arylsilyl group may be optionally substituted.

[0074] Alkylgermanyl - As used herein, alkyl substituted germanyl is contemplated. The alkylgermanyl may be an alkylgermanyl having 3-20 carbon atoms, preferably an alkylgermanyl having 3 to 10 carbon atoms. Examples of alkylgermanyl include trimethylgermanyl, triethylgermanyl, methyldiethylgermanyl, ethyldimethylgermanyl, tripropylgermanyl, tributylgermanyl, triisopropylgermanyl, methyldiisopropylgermanyl, dimethylisopropylgermanyl, tri-tert-butylgermanyl, triisobutylgermanyl, dimethyltert-butylgermanyl, methyldi-tert-butylgermanyl. In addition, the alkylgermanyl may be optionally substituted.

[0075] Arylgermanyl - as used herein, encompasses germanyl substituted with at least one aryl or heteroaryl group. The arylgermanyl may be an arylgermanyl having 6 to 30 carbon atoms, preferably an arylgermanyl having 8 to 20 carbon atoms. Examples of arylgermanyl include triphenylgermanyl, phenyldibiphenylgermanyl, diphenylbiphenylgermanyl, phenyldiethylgermanyl, diphenylethylgermanyl, phenyldimethylgermanyl, diphenylmethylgermanyl, phenyldiisopropylgermanyl, diphenylisopropylgermanyl, diphenylbutylgermanyl, diphenylisobutylgermanyl, diphenyltert-butylgermanyl. In addition, the arylgermanyl may be optionally substituted.

[0076] The term "aza" in azadibenzofuran, azadibenzothiophene, etc. means that one or more CH groups in the corresponding aromatic fragment are replaced by a nitrogen atom. For example, azatriphenylene includes dibenzo[f,h]quinoxaline, dibenzo[f,h]quinoline and other analogs having two or more nitrogens in the ring system. Other nitrogen analogs of the above-mentioned aza derivatives can be easily thought of by those of ordinary skill in the art, and all such analogs are determined to be included in the terms described herein.

[0077] In the present disclosure, unless otherwise defined, when any one of the terms in the group consisting of substituted alkyl, substituted cycloalkyl, substituted heteroalkyl, substituted heterocyclyl, substituted aralkyl, substituted alkoxy, substituted aryloxy, substituted alkenyl, substituted alkynyl, substituted aryl, substituted heteroaryl, substituted alkylsilyl, substituted arylsilyl, substituted alkylgermanyl, substituted arylgermanyl, substituted amino, substituted acyl, substituted carbonyl, substituted carboxylic acid, substituted ester , substituted hydroxyl, substituted mercapto, substituted sulfinyl, substituted sulfonyl, substituted phosphino, refers to alkyl, cycloalkyl, heteroalkyl, heterocyclic, aralkyl, alkoxy, aryloxy, alkenyl, alkynyl, aryl, heteroaryl, alkylsilyl, arylsilyl, alkylgermanyl, arylgermanyl, amino, acyl, carbonyl, carboxylic acid, ester, hydroxyl, mercapto, sulfinyl, sulfonyl and phosphino, any one of which may be selected from deuterium, halogen, unsubstituted 1-20 carbon atoms alkyl, unsubstituted cycloalkyl having 3-20 carbon atoms, unsubstituted heteroalkyl having 1-20 carbon atoms, unsubstituted heterocyclyl having 3-20 carbon atoms, unsubstituted aralkyl having 7-30 carbon atoms, unsubstituted alkoxy having 1-20 carbon atoms, unsubstituted aryloxy having 6-30 carbon atoms, unsubstituted alkenyl having 2-20 carbon atoms, unsubstituted alkynyl having 2-20 carbon atoms, unsubstituted cycloalkyl having 3-20 carbon atoms, unsubstituted heteroalkyl having 1-20 carbon atoms, unsubstituted aryloxy having 6-30 carbon atoms, unsubstituted cycloalkyl having 3-20 carbon atoms, unsubstituted cycloalkyl having 1 ... The present invention is substituted with an unsubstituted aryl group having 3 to 30 carbon atoms, an unsubstituted heteroaryl group having 3 to 30 carbon atoms, an unsubstituted alkylsilyl group having 3 to 20 carbon atoms, an unsubstituted arylsilyl group having 6 to 20 carbon atoms, an unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, an unsubstituted arylgermanyl group having 6 to 20 carbon atoms, an unsubstituted amino group, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group and a combination thereof having 0 to 20 carbon atoms.

[0078] It should be understood that when describing a molecular fragment as a substituent or otherwise attached to another moiety, its name can be written according to whether it is a fragment (e.g., phenyl, phenylene, naphthyl, dibenzofuranyl) or according to whether it is a whole molecule (e.g., benzene, naphthalene, dibenzofuran). As used herein, these different ways of specifying a substituent or attaching a fragment are considered equivalent.

[0079] In the compounds mentioned in this disclosure, hydrogen atoms may be partially or completely replaced by deuterium. Other atoms such as carbon and nitrogen may also be replaced by their other stable isotopes. The replacement of other stable isotopes in the compounds may be preferred because it enhances the efficiency and stability of the device.

[0080] In the compounds mentioned in the present disclosure, polysubstitution refers to the range including disubstitution up to the maximum number of available substitutions. When a substituent in the compounds mentioned in the present disclosure represents polysubstitution (including disubstitution, trisubstitution, tetrasubstitution, etc.), it means that the substituent can exist in multiple available substitution positions on its connection structure, and the substituent existing in multiple available substitution positions can be the same structure or different structures.

[0081] In the compounds mentioned in the present disclosure, unless clearly defined, for example, adjacent substituents can be optionally connected to form a ring, otherwise adjacent substituents in the compound cannot be connected to form a ring. In the compounds mentioned in the present disclosure, adjacent substituents can be optionally connected to form a ring, including both the situation where adjacent substituents can be connected to form a ring and the situation where adjacent substituents are not connected to form a ring. When adjacent substituents can be optionally connected to form a ring, the formed ring can be a monocyclic or polycyclic ring (including spirocyclic, bridged ring, condensed ring, etc.), as well as an alicyclic, heteroalicyclic, aromatic or heteroaromatic ring. In this statement, adjacent substituents can refer to substituents bonded to the same atom, substituents bonded to carbon atoms directly bonded to each other, or substituents bonded to carbon atoms further away. Preferably, adjacent substituents refer to substituents bonded to the same carbon atom and substituents bonded to carbon atoms directly bonded to each other.

[0082] The expression that adjacent substituents can be optionally linked to form a ring is also intended to be taken to mean that two substituents bonded to the same carbon atom are linked to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

[0083]

[0084] The expression that adjacent substituents can be optionally linked to form a ring is also intended to be taken to mean that two substituents bonded to carbon atoms directly bonded to each other are linked to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

[0085]

[0086] The expression that adjacent substituents can be optionally linked to form a ring is also intended to be taken to mean that two substituents bonded to a further distant carbon atom are linked to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

[0087]

[0088] Furthermore, the statement that adjacent substituents can optionally be linked to form a ring is also intended to be taken to mean that, in the case where one of the two adjacent substituents represents hydrogen, the second substituent is bonded at the position to which the hydrogen atom is bonded, thereby forming a ring. This is exemplified by the following formula:

[0089]

[0090] According to one embodiment of the present invention, an organic electroluminescent device is disclosed, comprising:

[0091] anode,

[0092] cathode,

[0093] A light-emitting layer is provided between the anode and the cathode,

[0094] A first organic layer and a second organic layer disposed between the anode and the light-emitting layer;

[0095] wherein the first organic layer comprises a first compound, and the second organic layer comprises a second compound;

[0096] wherein the first compound has a structure represented by Formula 1 or Formula 2, and the second compound has a structure represented by Formula 1; the first compound and the second compound have different structures from each other;

[0097] in,

[0098]

[0099] In Formula 1, Ar1 has a structure represented by Formula 1-a or Formula 1-a':

[0100]

[0101] A r1 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;

[0102] X1 is selected from CR in the same or different way each time it appears a or N;

[0103] Q1 is selected, identically or differently, at each occurrence from C or Si;

[0104] Y1 is selected from C, CR, or b or N;

[0105] L1, L1', L1", L1'' are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;

[0106] R1, R1', R a , R b The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0107] Adjacent substituents R1, R1', R a , R b can optionally be linked to form a ring;

[0108] represents the position where the formula 1-a or formula 1-a' is connected to the L1' in formula 1;

[0109]

[0110] In Formula 2, Ar2 has a structure represented by Formula 2-a or Formula 2-a':

[0111]

[0112] A r2' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;

[0113] X2 is selected from CR in the same or different way each time it appears c or N;

[0114] Y2 is selected from C, CR, or the like at each occurrence d or N;

[0115] Q2 is selected, at each occurrence, identically or differently, from C or Si;

[0116] L2, L2', L2", L2'', each occurrence of which is identical or different, is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;

[0117] R2, R2', R c , R d The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0118] Adjacent substituents R2, R2', R c , R d can optionally be linked to form a ring;

[0119] It represents the position where the formula 2-a or formula 2-a' is connected to the L2' in formula 2.

[0120] In this context, “adjacent substituents R1, R1′, Ra , R b "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two adjacent substituents R a Between adjacent substituents R1 and R a Between two adjacent substituents R b Between two adjacent substituents R1', between adjacent substituents R1' and R b Any one or more of these substituent groups may be connected to form a ring. Obviously, none of these substituent groups may be connected to form a ring.

[0121] In this context, “adjacent substituents R2, R2′, R c , R d "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two adjacent substituents R c Between adjacent substituents R2 and R c Between two adjacent substituents R d Between two adjacent substituents R2', between adjacent substituents R2' and R d Any one or more of these substituent groups may be connected to form a ring. Obviously, none of these substituent groups may be connected to form a ring.

[0122] According to an embodiment of the present invention, the first compound has a structure represented by Formula 1, the second compound has a structure represented by Formula 1, and the first compound and the second compound have different structures from each other.

[0123] According to an embodiment of the present invention, the first compound has a structure represented by Formula 2, the second compound has a structure represented by Formula 1, and the first compound and the second compound have different structures from each other.

[0124] According to one embodiment of the present invention, wherein the R1 is not an amino group.

[0125] According to one embodiment of the present invention, wherein L1, L1″′ each time appears, they are identically or differently selected from substituted or unsubstituted phenylene, or substituted or unsubstituted biphenylene.

[0126] According to one embodiment of the present invention, wherein L1', L1" each time appears, they are identically or differently selected from a single bond, a substituted or unsubstituted phenylene group, or a substituted or unsubstituted biphenylene group.

[0127] According to one embodiment of the present invention, the first compound and / or the second compound has a structure represented by Formula 1-1:

[0128]

[0129] Wherein, Ar1 has a structure represented by Formula 1-a-1:

[0130]

[0131] A r1 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;

[0132] X1 is selected from CR in the same or different way each time it appears a or N;

[0133] Y1 is selected from C, CR, or b or N;

[0134] Each time Z1-Z4 appears, they are selected from CR e ;

[0135] L1', L1" are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;

[0136] R1, R1', R a , R b , R e The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0137] Adjacent substituents R1, R1', R a , R b , R e can optionally be linked to form a ring; It represents the position where the formula 1-a-1 is connected to the L1' in the formula 1-1.

[0138] In this context, “adjacent substituents R1, R1′, R a , R b , R e "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two adjacent substituents R a Between adjacent substituents R1 and R a Between two adjacent substituents R b Between two adjacent substituents R1', between adjacent substituents R1' and R b Between adjacent substituents R1 and R e Between adjacent substituents R b With R e Between adjacent substituents R a With R e Between two adjacent substituents R e Any one or more of these substituent groups may be connected to form a ring. Obviously, none of these substituent groups may be connected to form a ring.

[0139] According to one embodiment of the present invention, the first compound and / or the second compound has a compound having a formula of 1-b to

[0140] The structure represented by any one of formulas 1-g:

[0141]

[0142] A r1 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;

[0143] X1 is selected from CR in the same or different way each time it appears a or N;

[0144] Y1 is selected from CR in the same or different way each time it occurs b or N;

[0145] Each time Z0-Z4 appears, they are selected from CR e ;

[0146] R1, R1', R a , R b, R e The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0147] Adjacent substituents R1, R1', R a , R b , R e Can optionally be linked to form a ring.

[0148] According to one embodiment of the present invention, the first compound and / or the second compound has a structure represented by Formula 1-b, Formula 1-c or Formula 1-d.

[0149] According to one embodiment of the present invention, the first compound has a structure represented by Formula 2-1:

[0150]

[0151] Ar2 has a structure represented by Formula 2-a-1:

[0152]

[0153] A r2 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;

[0154] X2 is selected from CR in the same or different way each time it appears c or N;

[0155] Y2 is selected from C, CR, or the like at each occurrence dor N;

[0156] Each time Z5-Z8 appears, it is selected from CR in the same or different way. f ;

[0157] L2', L2" are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;

[0158] R2, R2', R c , R d , R f The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0159] Adjacent substituents R2, R2', R c , R d , R f can optionally be linked to form a ring; It represents the position where the formula 2-a-1 is connected to the L2' in the formula 2-1.

[0160] In this context, “adjacent substituents R2, R2′, R c , R d , R f "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two adjacent substituents R c Between adjacent substituents R2 and R c Between two adjacent substituents R dBetween two adjacent substituents R2', between adjacent substituents R2' and R d Between adjacent substituents R2 and R f Between adjacent substituents R c With R f Between adjacent substituents R d With R f Between two adjacent substituents R f Any one or more of these substituent groups may be connected to form a ring. Obviously, none of these substituent groups may be connected to form a ring.

[0161] According to one embodiment of the present invention, wherein L1, L1', L1", L1"', L2, L2', L2", L2"', each time appearing, are identically or differently selected from a single bond, a substituted or unsubstituted arylene group having 6-20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3-20 carbon atoms, or a combination thereof.

[0162] According to one embodiment of the present invention, wherein, L1, L1', L1", L1', L2, L2', L2", L2'', each time appearing, are identically or differently selected from substituted or unsubstituted phenylene, substituted or unsubstituted biphenylene, substituted or unsubstituted terphenylene, substituted or unsubstituted naphthylene, substituted or unsubstituted fluorenylene, substituted or unsubstituted silylene, substituted or unsubstituted carbazolylene, substituted or unsubstituted dibenzofuranylene, substituted or unsubstituted dibenzothiophenylene, substituted or unsubstituted dibenzoselenopheneylene, substituted or unsubstituted phenanthrenylene, substituted or unsubstituted triphenylene, substituted or unsubstituted pyridinylene, substituted or unsubstituted spirobifluorenylene, substituted or unsubstituted anthraceneylene, substituted or unsubstituted perylene, or a combination thereof.

[0163] According to one embodiment of the present invention, wherein L1, L1', L1", L1'", L2, L2', L2", L2'" are identically or differently selected from substituted or unsubstituted phenylene, or substituted or unsubstituted biphenylene each time they appear.

[0164] According to one embodiment of the present invention, the first compound has a structure represented by any one of Formula 2-b to Formula 2-g:

[0165]

[0166]

[0167] A r2 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;

[0168] X2 is selected from CR in the same or different way each time it appears c or N;

[0169] Y2 is selected from CR in the same or different manner at each occurrence d or N;

[0170] Each time Z5-Z9 appears, it is selected from CR in the same or different way. f ;

[0171] R2, R2', R c , R d , R f The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0172] Adjacent substituents R2, R2', R c , R d , R f Can optionally be linked to form a ring.

[0173] According to one embodiment of the present invention, R1 and R2 are selected from substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, or combinations thereof, the same or different when they appear each time.

[0174] According to one embodiment of the present invention, R1 and R2 are identically or differently selected from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms and substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms each time they appear.

[0175] According to one embodiment of the present invention, R1 and R2 are selected from substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted fluorenyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophenyl, the same or different when they appear each time.

[0176] According to one embodiment of the present invention, R1, R1', R a , R b , R e , R2, R2', R c , R d , R f each occurrence is identically or differently selected from hydrogen, deuterium, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, or a combination thereof; the adjacent substituents R2, R2', R c , R d , R f Can optionally be linked to form a ring.

[0177] According to one embodiment of the present invention, R1, R1', R a , R b , R e , R2, R2', R c , R d , R f Each occurrence is identically or differently selected from hydrogen, deuterium, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, or a combination thereof.

[0178] According to one embodiment of the present invention, wherein Ar1', Ar2' are selected from substituted or unsubstituted aryl groups having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 20 carbon atoms, or a combination thereof.

[0179] According to one embodiment of the present invention, wherein, Ar1', Ar2' each time appear, are identically or differently selected from substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted fluorenyl, substituted or unsubstituted silyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophene, substituted or unsubstituted dibenzoselenophene, substituted or unsubstituted phenanthryl, substituted or unsubstituted triphenylene, substituted or unsubstituted pyridyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted anthracenyl, substituted or unsubstituted pyrene, or a combination thereof.

[0180] According to one embodiment of the present invention, wherein Ar1' and Ar2' are identically or differently selected from the group consisting of G1 to G75 each time they appear, and the specific structures of G1 to G75 refer to claim 10.

[0181] According to one embodiment of the present invention, wherein Ar1 is selected from the group consisting of G26 to G70 the same or differently each time it appears.

[0182] According to one embodiment of the present invention, wherein Ar2 is selected from the group consisting of G26 to G70 the same or differently each time it appears.

[0183] According to one embodiment of the present invention, the first compound and / or the second compound is selected from the group consisting of compound C1 to compound C54, and the specific structures of compound C1 to compound C54 are shown in claim 11.

[0184] According to one embodiment of the present invention, the first compound is selected from the group consisting of compound D1 to compound D53, and the specific structures of compound D1 to compound D53 are shown in claim 12.

[0185] According to an embodiment of the present invention, the first organic layer and the second organic layer are hole transport layers or electron blocking layers.

[0186] According to an embodiment of the present invention, the first organic layer and the second organic layer are both electron blocking layers, and the first compound and the second compound are electron blocking materials.

[0187] According to an embodiment of the present invention, the second organic layer is disposed on the first organic layer.

[0188] According to an embodiment of the present invention, the second organic layer is disposed on the first organic layer, and the first organic layer is in direct contact with the second organic layer.

[0189] According to an embodiment of the present invention, the light-emitting layer is in direct contact with the second organic layer.

[0190] According to one embodiment of the present invention, a third organic layer and / or a fourth organic layer is further included between the anode and the light-emitting layer.

[0191] According to an embodiment of the present invention, the third organic layer and / or the fourth organic layer is disposed between the anode and the first organic layer, and the second organic layer is disposed on the first organic layer.

[0192] According to one embodiment of the present invention, the third organic layer and the fourth organic layer are arranged between the anode and the first organic layer, and the second organic layer is arranged on the first organic layer; the third organic layer and the fourth organic layer are respectively a hole injection layer and a hole transport layer, the first organic layer and the second organic layer are both electron blocking layers, and the first compound and the second compound are electron blocking materials.

[0193] According to an embodiment of the present invention, the second organic layer is disposed on the first organic layer, the hole mobility of the first organic layer is μ1, the hole mobility of the second organic layer is μ2, and μ1>μ2.

[0194] According to an embodiment of the present invention, the second organic layer is disposed on the first organic layer, the hole mobility of the first organic layer is μ1, the hole mobility of the second organic layer is μ2, and μ1≥17×10 -5 cm 2 / Vs,μ2<17×10 -5 cm 2 / Vs.

[0195] According to an embodiment of the present invention, the second organic layer is disposed on the first organic layer, the hole mobility of the first organic layer is μ1, the hole mobility of the second organic layer is μ2, and μ1≥18×10 -5 cm 2 / Vs,μ2<17×10 -5 cm 2 / Vs.

[0196] According to an embodiment of the present invention, the second organic layer is disposed on the first organic layer, the hole mobility of the first organic layer is μ1, the hole mobility of the second organic layer is μ2, and μ1≥20×10 -5 cm 2 / Vs,μ2<15×10 -5 cm 2 / Vs.

[0197] According to one embodiment of the present invention, the second organic layer is disposed on the first organic layer, and the HOMO of the first compound in the first organic layer is HOMO 第一化合物 , the HOMO of the second compound in the second organic layer is HOMO 第二化合物 , HOMO 第一化合物 >HOMO 第二化合物 .

[0198] According to one embodiment of the present invention, HOMO 第一化合物 ≥-5.170eV.

[0199] According to one embodiment of the present invention, HOMO 第一化合物 ≥-5.165eV.

[0200] According to one embodiment of the present invention, HOMO 第二化合物 <-5.170eV.

[0201] According to one embodiment of the present invention, HOMO 第二化合物 ≤-5.180eV.

[0202] According to one embodiment of the present invention, HOMO 第二化合物 ≤-5.20eV.

[0203] According to one embodiment of the present invention, HOMO 第一化合物 ≥-5.170eV, HOMO 第二化合物 <-5.170eV.

[0204] According to one embodiment of the present invention, HOMO 第一化合物 ≥-5.165eV, HOMO 第二化合物 <-5.170eV.

[0205] According to an embodiment of the present invention, the total thickness of the first organic layer and the second organic layer is between 5 nm and 150 nm.

[0206] According to an embodiment of the present invention, the total thickness of the first organic layer and the second organic layer is between 30 nm and 120 nm.

[0207] According to an embodiment of the present invention, the total thickness of the first organic layer and the second organic layer is between 40 nm and 100 nm.

[0208] According to an embodiment of the present invention, the thickness of the first organic layer accounts for 20%-80% of the total thickness of the first organic layer and the second organic layer.

[0209] According to an embodiment of the present invention, the thickness of the first organic layer accounts for 50%-70% of the total thickness of the first organic layer and the second organic layer.

[0210] According to an embodiment of the present invention, the light-emitting layer further comprises at least one phosphorescent material.

[0211] According to one embodiment of the present invention, the phosphorescent light-emitting material comprises any one or more light-emitting materials selected from the following group: blue phosphorescent light-emitting material, green phosphorescent light-emitting material, yellow phosphorescent light-emitting material, and red phosphorescent light-emitting material.

[0212] According to one embodiment of the present invention, the phosphorescent material is a metal complex having M(L a ) m (L b ) n (L c ) q The general formula of

[0213] Wherein, the metal M is selected from metals with a relative atomic mass greater than 40;

[0214] L a , L b and L c are the first ligand, the second ligand and the third ligand coordinated with the metal M, respectively, a , L b , L c Can be the same or different;

[0215] L a , L b and L c can optionally be linked to form a multidentate ligand;

[0216] m is 1, 2 or 3; n is 0, 1 or 2; q is 0, 1 or 2; the sum of m, n, q is equal to the oxidation state of metal M; when m is greater than or equal to 2, multiple L a Can be the same or different; when n is 2, the two L b can be the same or different; when q is 2, the two L c Can be the same or different;

[0217] Ligand L a It has a structure as shown in Formula 3:

[0218]

[0219] in,

[0220] Ring D is selected from a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;

[0221] Ring F is selected from a 5-membered unsaturated carbon ring, a benzene ring, a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;

[0222] Ring D and Ring F via U a and U b condense;

[0223] U a and U b is selected identically or differently at each occurrence from C or N;

[0224] R' d , R' f Each occurrence of the same or different means mono-, poly- or no-substitution;

[0225] U1-U4 are selected from CR in the same or different way each time they appear. u or N;

[0226] R' d , R' f , R u The alkyl radicals are selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl radicals having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl radicals having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl radicals having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl radicals having 3 to 20 ring atoms, substituted or unsubstituted aralkyl radicals having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy radicals having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy radicals having 6 to 30 carbon atoms, substituted or unsubstituted alkene radicals having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0227] Adjacent substituent R' d , R' f , R u can optionally be linked to form a ring;

[0228] Ligand L b , L c Each occurrence is identically or differently selected from the group consisting of:

[0229]

[0230] in,

[0231] R a1 , R b1 and R c1 Each occurrence is identical or different and indicates mono-, poly-, or unsubstituted;

[0232] X b Each occurrence is identically or differently selected from the group consisting of: O, S, Se, NR N1 and CR X1 R X2 ;

[0233] X c and X d Each occurrence is identically or differently selected from the group consisting of: O, S, Se and NR N2 ;

[0234] R a1 , R b1 , R c1 , R N1 , R N2 , R X1 and R X2 The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0235] Adjacent substituent R a1 , R b1 , R c1 , R N1 , R N2 , RX1 and R X2 Can optionally be linked to form a ring.

[0236] In this context, adjacent substituents R' d , R' f , R u can be optionally connected to form a ring, which is intended to indicate that when there is a substituent R' d , substituent R' f , Substituent R u When adjacent substituent groups, such as adjacent substituents R' d Between adjacent substituents R' f Between and adjacent substituents R u Between adjacent substituents R' d With R' f Between adjacent substituents R' d With R u Between and adjacent substituents R' f With R u Any one or more of these adjacent substituent groups can be linked to form a ring. Obviously, when there is a substituent R' d , substituent R' f , Substituent R u When the substituent groups are not linked to form a ring.

[0237] In this embodiment, the adjacent substituent R a1 , R b1 , R c1 , R N1 , R N2 , R X1 and R X2 can be optionally linked to form a ring, which is intended to represent adjacent substituent groups, for example, two substituents R a1 Between the two substituents R b1 Between the two substituents R c1 Between, the substituent R a1 and R b1 Between, the substituent R a1 and R c1 Between, the substituent R b1 and R c1 Between, the substituent R a1 and R N1 Between, the substituent R b1 and R N1 Between, the substituent R a1 and R X1 Between, the substituent R a1 and R X2 Between, the substituent R b1and R X1 Between, the substituent R b1 and R X2 Between, the substituent R a1 and R N2 Between, the substituent R b1 and R N2 Between, and R X1 and R X2 Any one or more of these substituent groups may be linked to form a ring. For example, The adjacent substituent R a1 , R b1 Can be optionally linked to form a ring, which can form one or more of the following structures including but not limited to:

[0238] Wherein W is selected from O, S, Se, NR w or CR w R w ; wherein said R w , R a ', R b ' is defined in the same way as R a1 Obviously, these substituents may not be connected to form a ring.

[0239] According to one embodiment of the present invention, in Formula 3, the two R' f Connect into a ring.

[0240] According to one embodiment of the present invention, in Formula 3, the two R' f Connected to form a 5-membered unsaturated carbocyclic ring, a 5-membered heteroaromatic ring or a 6-membered aromatic ring.

[0241] According to one embodiment of the present invention, in Formula 3, ring D is a 6-membered heteroaromatic ring, and ring F is a benzene ring or a 6-membered heteroaromatic ring.

[0242] According to one embodiment of the present invention, in Formula 3, ring D is a 6-membered heteroaromatic ring, and ring F is a 5-membered heteroaromatic ring or a 5-membered unsaturated carbon ring.

[0243] According to one embodiment of the present invention, in Formula 3, ring D is a 6-membered heteroaromatic ring, ring F is a benzene ring or a 6-membered heteroaromatic ring, and two R' f Connected to form a ring, connected to form a 6-membered aromatic ring or a 6-membered heteroaromatic ring.

[0244] According to one embodiment of the present invention, in Formula 3, Ring D is a 6-membered heteroaromatic ring, Ring F is a 5-membered heteroaromatic ring or a 5-membered unsaturated carbon ring, and two R'f Connected to form a 6-membered aromatic ring or a 6-membered heteroaromatic ring.

[0245] According to one embodiment of the present invention, in Formula 3, at least two of U1-U4 are selected from CR u , and the two R u Connect into a ring.

[0246] According to one embodiment of the present invention, in Formula 3, U3 and U4 are selected from CR u , and the two R u Connect into a ring.

[0247] According to one embodiment of the present invention, in Formula 3, U3 and U4 are selected from CR v , and the two R u Connected to form a 6-membered aromatic ring or a 6-membered heteroaromatic ring.

[0248] According to one embodiment of the present invention, in Formula 3, R' d , R' f , R u At least one or two groups of adjacent substituents are connected to form a ring. For example, two substituents R' d Connect to form a ring, or two substituents R' f Connect to form a ring, or two substituents R u Connect to form a ring, or substituent R' d With substituent R' f Connected to form a ring, or substituent R' d With substituent R u Connected to form a ring, or substituent R' f With substituent R u Connected to form a ring, or two substituents R' d The two substituents R' are connected to form a ring f Connect to form a ring, or two substituents R' d When two substituents R are connected to form a ring u Connect to form a ring, or two substituents R' f When two substituents R are connected to form a ring u Connect to form a ring, substituent R' f With substituent R u When two substituents R are connected to form a ring u Connect to form a ring, or substituent R d With substituent R u When two substituents R are connected to form a ring u Connect to form a ring; R' d , R' f , R uA similar situation occurs when more groups of adjacent substituents are connected to form a ring.

[0249] According to one embodiment of the present invention, the ligand L b Has the following structure:

[0250]

[0251] Among them, R Ⅰ To R Ⅶ each independently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1-20 carbon atoms, substituted or unsubstituted heterocyclyl having 3-20 ring atoms, substituted or unsubstituted aralkyl having 7-30 carbon atoms, substituted or unsubstituted alkoxy having 1-20 carbon atoms, substituted or unsubstituted aryloxy having 6-30 carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted cycloalkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aralkyl having 7-30 carbon atoms, substituted or unsubstituted alkoxy having 1-20 carbon atoms, substituted or unsubstituted aryloxy having 6-30 carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted cycloalkyl having 2 -20 carbon atoms, alkynyl groups, substituted or unsubstituted aryl groups, substituted or unsubstituted heteroaryl groups, substituted or unsubstituted alkylsilyl groups, substituted or unsubstituted arylsilyl groups, substituted or unsubstituted alkylgermanyl groups, substituted or unsubstituted arylgermanyl groups, substituted or unsubstituted amino groups, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, sulfenyl groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof.

[0252] According to one embodiment of the present invention, R Ⅰ -R Ⅲ At least one of them is selected from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, or a combination thereof; and / or R Ⅳ -R Ⅵ At least one of them is selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, or a combination thereof.

[0253] According to one embodiment of the present invention, R Ⅰ -R ⅢAt least two of them are selected from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, or a combination thereof at each occurrence; and / or R Ⅳ -R Ⅵ At least two of the above are selected, at each occurrence, identically or differently, from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, or a combination thereof.

[0254] According to one embodiment of the present invention, R Ⅰ -R Ⅲ At least two of them are selected from substituted or unsubstituted alkyl having 2 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 2 to 20 carbon atoms, or a combination thereof at each occurrence; and / or R Ⅳ -R Ⅵ At least two of the above are selected, at each occurrence, identically or differently, from substituted or unsubstituted alkyl having 2 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 2 to 20 carbon atoms, or a combination thereof.

[0255] According to one embodiment of the present invention, in the organic electroluminescent device, the phosphorescent material is an Ir complex, a Pt complex or an Os complex.

[0256] According to one embodiment of the present invention, in the organic electroluminescent device, the phosphorescent material is an Ir complex having Ir(L a )(L b )(L c )、Ir(L a )2(L b )、Ir(L a )(L b )2、Ir(L a )2(L c ) or Ir(L a )(L c )A structure shown in any one of 2.

[0257] According to one embodiment of the present invention, the ligand L a The compound has a structure as shown in Formula 3 and comprises at least one structural unit selected from the group consisting of a 6-membered and 6-membered aromatic ring, a 6-membered and 6-membered heteroaromatic ring, a 6-membered and 5-membered aromatic ring and a 6-membered and 5-membered heteroaromatic ring.

[0258] According to one embodiment of the present invention, in the organic electroluminescent device, the ligand L a The compound has a structure as shown in Formula 3 and comprises at least one structural unit selected from the group consisting of naphthalene, phenanthrene, quinoline, isoquinoline and azaphenanthrene.

[0259] According to one embodiment of the present invention, in the electroluminescent device, the ligand L a Each occurrence is identically or differently selected from any one of the group consisting of:

[0260]

[0261]

[0262]

[0263] According to one embodiment of the present invention, in the electroluminescent device, the ligand L b Each occurrence is identically or differently selected from any one of the group consisting of:

[0264]

[0265]

[0266] According to one embodiment of the present invention, in the electroluminescent device, the phosphorescent material is selected from the group consisting of the following structures:

[0267]

[0268]

[0269]

[0270]

[0271]

[0272]

[0273]

[0274]

[0275]

[0276]

[0277]

[0278]

[0279] According to another embodiment of the present invention, an electronic component is disclosed, which includes an organic electroluminescent device. The specific structure of the organic electroluminescent device is as shown in any of the above embodiments.

[0280] According to an embodiment of the present invention, the electronic component is a display component or a lighting component.

[0281] Combination with other materials

[0282] The materials for specific layers in the organic light-emitting device described in the present invention can be used in combination with various other materials present in the device. The combination of these materials is described in detail in paragraphs 0132-0161 of U.S. Patent Application US2016 / 0359122A1, the entire contents of which are incorporated herein by reference. The materials described or mentioned therein are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and those skilled in the art can easily consult the literature to identify other materials that can be used in combination.

[0283] The materials described herein as specific layers that can be used in organic light-emitting devices can be used in combination with a variety of other materials present in the device. For example, the compounds disclosed herein can be used in combination with a variety of luminescent dopants, hosts, transport layers, barrier layers, injection layers, electrodes, and other layers that may be present. The combination of these materials is described in detail in paragraphs 0080-0101 of U.S. Patent Application US2015 / 0349273A1, the entire contents of which are incorporated herein by reference. The materials described or mentioned therein are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and those skilled in the art can easily consult the literature to identify other materials that can be used in combination.

[0284] In the embodiments of the device, the characteristics of the device are also tested using conventional equipment in the field (including but not limited to the vapor deposition machine produced by Angstrom Engineering, the optical test system and life test system produced by Suzhou Fushida, the ellipsometer produced by Beijing Liangtuo, etc.), using methods well known to those skilled in the art. Since those skilled in the art are all aware of the use of the above-mentioned equipment, test methods and other related contents, and can obtain the inherent data of the sample with certainty and without influence, the above-mentioned related contents will not be elaborated in this patent.

[0285] The first compound and the second compound used in the present invention can be obtained by referring to the preparation methods in the prior art, such as CN202310767967.1 and CN102448926A, which will not be repeated here.

[0286] The organic electroluminescent device of the present invention may include charge injection and transport layers, such as a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer; it may also include a light-emitting layer, the light-emitting layer includes at least one light-emitting dopant and at least one host compound, the light-emitting dopant may be a fluorescent light-emitting dopant and / or a phosphorescent light-emitting dopant; it may also include an electron blocking layer and a hole blocking layer. The first and second organic layers of the present invention are preferably used as hole transport layers or electron blocking layers.

[0287] Hole mobility is an effective means to measure the hole transport ability of a compound. The applicant's prior patent application CN202210098602X focuses on the test method of hole mobility of hole transport materials. The entire content is incorporated herein by reference. The method for measuring the hole mobility of some of the first and second compounds in this application is as follows:

[0288] Step 1: Prepare Figure 3 A HOD device 300 is shown.

[0289] A 0.7 mm thick glass substrate with a pre-patterned The substrate is washed with deionized water and detergent and then treated with oxygen plasma and UV ozone. The substrate is then dried in a glove box to remove moisture and loaded onto a rack and transferred into a vacuum chamber. The organic layers specified below are placed in a vacuum of about 10 -6 Torr's case The anode layer was deposited sequentially by vacuum thermal evaporation at a rate of: first, compound HT and compound H-2 were simultaneously deposited as a hole injection layer (HIL, weight ratio 80:20, )302, evaporate the test compound C10 as a hole transport layer 303, simultaneously evaporating compound HT and compound H-2 as an electron blocking layer (HIL, weight ratio 80:20, )304, finally, evaporate metallic silver as a cathode (Cathode, ) 305. The device is then transferred back to the glove box and encapsulated with a glass cover (306) to complete the device. Layers of the device that use more than one material are obtained by doping different compounds in the weight ratios recorded.

[0290] Step 2: Measure the JV data of the prepared HOD device, and then calculate according to the Mott-Gurney equation to obtain the hole mobility of the test compound C10. Specifically:

[0291] In this paper, the hole mobility of the compound was measured by IVL photoelectric test system model S-1000GA4 of Suzhou Fushida Scientific Instrument Co., Ltd., and the JV curve of the above HOD device was tested and the J 1 / 2 -V curve and calculated according to the Mott-Gurney equation.

[0292] The Mott-Gurney equation is:

[0293]

[0294] In the Mott-Gurney equation, ε r is the relative dielectric constant of the compound to be tested. For organic compounds, ε r =3,ε o is the vacuum dielectric constant ε o =8.85*10 -12 F / m, d is the sample thickness (in m), J is the current density (in A / m 2 ), V is the voltage (unit is volts, V), μ is the hole mobility of the test compound. The test compound was tested by scanning the voltage (voltage step size 0.3V) to 80mA / cm 2 , make the J of the device containing it 1 / 2 -V curve, select close to 80mA / cm 2 Test points (generally no less than 4 data points), here we select the data under appropriate voltage conditions for fitting, and get the fitting straight line formula y = ax-b, where the slope a is J 1 / 2 / V, the abscissa x is the voltage V, the ordinate y is the square root of the current density J, and b is the intercept. The hole mobility of the compound to be tested can be calculated by the above formula.

[0295] The structures of the compounds used in the device are shown below:

[0296]

[0297] In step 1, C10 is replaced with other compounds to be tested, and the hole mobility of other compounds can be measured using the same method.

[0298] In this paper, the HOMO energy level (highest occupied orbital) of the compound is measured using electrochemical cyclic voltammetry, which is the most commonly used method for determining the energy level of organic materials. The test uses an electrochemical workstation model CorrTest CS120 produced by Wuhan Kosit Instrument Co., Ltd. and a three-electrode working system: a platinum disk electrode as the working electrode, an Ag / AgNO3 electrode as the reference electrode, and a platinum wire electrode as the auxiliary electrode. Anhydrous DCM is used as the solvent and 0.1 mol / L tetrabutylammonium hexafluorophosphate is used as the supporting electrolyte. The compound to be tested is mixed with 10 -3 mol / L solution, nitrogen was introduced into the solution for 10 min to remove oxygen before testing. Instrument parameter settings: scanning rate 100 mV / s, potential interval 0.5 mV, test window -1 V to 1 V.

[0299] The hole mobility and HOMO energy level data of the compounds measured by the above method are listed in Table 1.

[0300] Table 1 Data of hole mobility and HOMO energy level of some first and second compounds

[0301]

[0302] Hole transport materials usually have excellent hole transport capabilities. Applying them in devices can reduce the driving voltage of the device, but excessive hole injection and transport can also cause carrier imbalance in the device, thereby reducing the life of the device. In order to balance the carriers in the device and further improve the performance of OLEDs, especially to achieve a reduction in capacitance or an increase in life, the present invention discloses a novel organic electroluminescent device, which is provided with a specific first organic layer and a second organic layer between the anode and the light-emitting layer, wherein the first organic layer comprises a first compound having a structure of Formula 1 or Formula 2, and the second organic layer comprises a second compound having a structure of Formula 2. Preferably, the first organic layer and the second organic layer are used as electron blocking layers (EBL) in the device.

[0303] The device structure of the present invention using the first and second compounds with specific structures to form a multi-layer electron blocking layer can reduce the energy barrier between the light-emitting layer and the electron blocking layer to a certain extent, solve the problem of carrier imbalance in the device, and provide more space for regulating and balancing the carriers in the device. For example, not only can the first and second compounds be appropriately matched to form an effective energy level match (preferably, HOMO 第一化合物 >HOMO 第二化合物); a gradient setting of hole mobility can also be formed by applying the first and second compounds with different hole mobilities to different organic layers (preferably, the hole mobility of the first organic layer is greater than that of the second organic layer). On the basis of ensuring low voltage and high efficiency of the device, the device life is effectively improved and / or the device capacitance is reduced, which has a wide range of application prospects.

[0304] The working principle and effect of the novel electroluminescent device of the present invention will be described below through several groups of specific device embodiments and comparative examples. Obviously, the following embodiments are only for illustrative purposes and are not intended to limit the scope of the present invention. Based on the following embodiments, those skilled in the art can obtain other embodiments of the present invention by improving them.

[0305] Device Embodiment

[0306] The preparation method of the electroluminescent device is not limited, and the preparation method of the following embodiment is only an example and should not be construed as limiting. A person skilled in the art can reasonably improve the preparation method of the following embodiment based on the prior art. For example, the ratio of various materials in each organic layer is not particularly limited, and a person skilled in the art can reasonably select within a certain range based on the prior art.

[0307] Device Example 1: Preparation of an organic electroluminescent device 200, such as Figure 2 shown.

[0308] First, a 0.7 mm thick glass substrate with a pre-patterned indium tin oxide (ITO) was used. The substrate is then dried in a glove box to remove moisture and loaded onto a support and transferred into a vacuum chamber. The organic layer specified below is placed in a vacuum of about 10 -6 Torr The anode was deposited sequentially by vacuum thermal evaporation at a rate of 1:1. First, compound H-1 and compound H-2 were simultaneously deposited as a hole injection layer (HIL, weight ratio 98:2, )202, evaporate compound H-1 on the HIL to serve as a hole transport layer (HTL, )203, then, the compound C10 is evaporated on the hole transport layer for the first organic layer (EBL1, )204, evaporating compound C53 on the first organic layer for the second organic layer (EBL2, )205. Subsequently, compound RH and compound RD were used as an emission layer (EML, weight ratio 97:3, )206, compound ET and Liq are co-deposited as an electron transport layer (ETL, weight ratio 2:3, )207, evaporation Liq as the electron injection layer (EIL) 208, followed by the evaporation of metal aluminum (Al, ) as the cathode 209, and the device is then returned to the glove box and packaged with a glass cover sheet 210 to complete the device.

[0309] Device Example 2:

[0310] The device preparation method of device example 2 is the same as that of example 1, except that the compound C10 in the first organic layer is replaced by compound C52.

[0311] Device Example 3:

[0312] The device preparation method of device example 3 is the same as that of example 1, except that the compound C10 in the first organic layer is replaced by compound D2.

[0313] Device Comparison Example 1:

[0314] The device preparation method of device comparison example 1 is the same as that of embodiment 1, except that the compound C10 is evaporated as an electron blocking layer with a thickness of The first organic layer and the second organic layer in Example 1 are replaced.

[0315] Device Comparison Example 2:

[0316] The device preparation method of device comparison example 2 is the same as that of embodiment 1, except that the compound C53 is evaporated as an electron blocking layer with a thickness of The first organic layer and the second organic layer in Example 1 are replaced.

[0317] Device Comparison Example 3:

[0318] The device preparation method of device comparison example 3 is the same as that of embodiment 1, except that the compound C52 is evaporated as an electron blocking layer with a thickness of The first organic layer and the second organic layer in Example 1 are replaced.

[0319] Device Comparison Example 4:

[0320] The device preparation method of device comparison example 4 is the same as that of embodiment 1, except that the compound D2 is evaporated as an electron blocking layer with a thickness of The first organic layer and the second organic layer in Example 1 are replaced.

[0321] Device Comparison Example 5:

[0322] The device preparation method of device comparison example 5 is consistent with that of embodiment 1, except that compound C53 of the second organic layer is replaced by compound A.

[0323] Device Comparison Example 6:

[0324] The device preparation method of device comparison example 6 is consistent with that of example 3, except that compound C53 of the second organic layer is replaced by compound A.

[0325] Device Comparison Example 7:

[0326] The device preparation method of device comparison example 7 is the same as that of embodiment 1, except that the compound C10 in the first organic layer is replaced by compound A.

[0327] Device Comparison Example 8:

[0328] The device preparation method of device comparison example 8 is consistent with that of embodiment 1, except that the compound C10 of the first organic layer is replaced by compound B; and the compound C53 of the second organic layer is replaced by compound A.

[0329] Device Comparison Example 9:

[0330] The device preparation method of device comparison example 9 is consistent with that of embodiment 3, except that compound C53 of the second organic layer is replaced by compound D53.

[0331] The structures and thicknesses of the first organic layer and the second organic layer in the device are shown in Table 2. Layers of more than one material in the device are obtained by doping different compounds at their recorded weight ratios. Note that the above device structure is only an example, and the present invention is not limited to the specific embodiments listed above.

[0332] Table 2 Partial device structures of Examples 1 to 3 and Comparative Examples 1 to 9

[0333]

[0334] The structures of the compounds used in the device are shown below:

[0335]

[0336]

[0337] Table 3 summarizes the device performance of Examples 1 to 3 and Comparative Examples 1 to 9. The color coordinates (CIEx, CIEy), voltage (V) and current efficiency (CE) are obtained at a current density of 15 mA / cm 2 The device life (LT95) is measured at 80mA / cm 2 The measured time for the brightness to decay to 95% of the initial brightness. max ) is to use an impedance analyzer (Keysight E4990A) to test the capacitance of the device: the luminous area of ​​the device prepared in the present invention is 0.04 cm 2A DC bias of -4V to 5V was applied to the electrodes at both ends of the device, and a 100mV sinusoidal AC voltage signal was superimposed. The device was tested under an AC voltage with a frequency of 500Hz, and the CV curve of the device was measured, and the maximum capacitance C of the device was obtained. max These data are recorded and shown in Table 3.

[0338] Table 3 Device data of Examples 1 to 3 and Comparative Examples 1 to 9

[0339]

[0340] It can be seen from the color coordinate data in Table 3 that the color coordinates of the device embodiment and the device comparative example are consistent.

[0341] As shown in Table 2, device embodiments 1 and 2 are devices of the present invention that respectively contain the first and second compounds having the skeleton of Formula 1 and different structures from each other in the first organic layer and the second organic layer. Device embodiment 3 is a device of the present invention that contains the first compound having the structure of Formula 2 in the first organic layer and the second compound having the structure of Formula 1 in the second organic layer. In device embodiments 1 to 3, both the first organic layer and the second organic layer exist as EBL. It can be seen from the device performance data in Table 3 that the device embodiments of the present invention, whether compared with a device having a single-layer EBL layer formed only by compounds of Formula 1 or Formula 2, or compared with a device having a double-layer EBL but not containing a compound of the specific structure of the present invention, all show better device performance, especially in terms of life and / or capacitance. It shows unique advantages. Specifically:

[0342] Compared with the device Comparative Examples 1 and 2 using only the first compound (C10) or the second compound (C53) to form a single-layer electron blocking layer, Example 1 exhibits more excellent performance in many aspects. For example, compared with Comparative Example 1, the capacitance of Example 1 is greatly reduced by 54%. Compared with Comparative Example 2, Example 1 further achieves a significant reduction in voltage (reduced by 0.32V) and a significant improvement in life (improved by 55%) on the basis of maintaining low capacitance.

[0343] Compared with device comparison examples 2 and 3 that only use the first compound (C53) or the second compound (C52) to form a single-layer electron blocking layer, device embodiment 2 of the present invention also achieves significant improvement in comprehensive performance. For example, compared with comparison example 2, both have a relatively low capacitance, but embodiment 2 has a lower voltage and a longer life. Compared with comparison example 3, both have a relatively long life, but embodiment 2 has a lower capacitance, which is 51% lower than that of comparison example 3.

[0344] Similarly, compared with Comparative Examples 2 and 4 using the first or second compound to form a single-layer EBL layer, the device Example 3 of the present invention also achieves significant improvement in comprehensive performance. Compared with Comparative Example 2, both have a relatively low capacitance, but Example 3 has a lower voltage and a longer lifespan; compared with Comparative Example 4, both have a substantially similar long lifespan, but Example 3 has a higher efficiency and also achieves a significant reduction in capacitance (reduced by 41%).

[0345] The above results show that compared with a device that uses only the first compound or the second compound to form a single-layer EBL, the present invention uses a first compound having a structure of Formula 1 or Formula 2 for a specific first organic layer, and uses a second compound having a structure of Formula 1 for a specific second organic layer to form a double-layer EBL. The novel organic electroluminescent device can better balance the carriers in the device, reduce the energy barrier between EBL and EML, and enable the device to have better comprehensive performance, especially to achieve low capacitance and / or long life of the device.

[0346] On the other hand, compared with a device having a double-layer EBL but not containing the compound combination of the specific structure of the present invention, the device embodiment of the present invention still exhibits excellent comprehensive performance, achieving a reduction in voltage and capacitance and / or an extension of life, specifically:

[0347] Compared with the device in which the first organic layer contains the first compound of the specific formula 1 or formula 2 structure of the present invention, and the second organic layer contains the second compound not of the present invention, the device embodiment of the present invention exhibits more excellent device comprehensive performance. For example, compared with Example 1 and Comparative Example 5, and compared with Example 3 and Comparative Examples 6 and 9, both achieve a significant improvement in life and / or a significant reduction in voltage while maintaining low capacitance. Compared with the device comparative example in which the first organic layer contains the first compound not of the present invention and the second organic layer contains the second compound of the present invention, the device embodiment of the present invention also achieves more excellent device performance. For example, compared with Comparative Example 7, device embodiments 1 to 3 all have significantly reduced voltage (reduced by more than 31%) and greatly improved life (increased by more than 2 times). Not only that, compared with device comparative example 8 in which the first and second organic layers do not contain the first and second compounds of the present invention, device embodiments 1 to 3 of the present invention also achieve more excellent device comprehensive performance, such as low voltage, long life and high efficiency, and especially, achieve unexpectedly significant improvement in life. In fact, the compound A not of the present invention selected in the device comparison example is also a commonly used electron blocking material. However, the above data show that compared with the device comparison example containing compound A and the first or second compound of the present invention in the first or second organic layer, respectively, the device embodiment of the present invention still exhibits more excellent comprehensive performance, further proving the unique advantages of the novel electroluminescent device of the present invention.

[0348] In summary, the novel electroluminescent device disclosed in the present invention is provided with a specific first organic layer and a second organic layer between the light-emitting layer and the anode, wherein the first organic layer comprises a first compound having a structure of Formula 1 or Formula 2, and the second organic layer comprises a second compound having a structure of Formula 1. In particular, the first and second organic layers can be used as electron blocking layers in the device. Whether compared with a device having a single-layer EBL layer or a device having a double-layer EBL but not comprising a compound combination of a specific structure of the present invention, the novel electroluminescent device of the present invention exhibits better comprehensive performance.

[0349] The device structure of the present invention using the first and second compounds with specific structures to form a multi-layer electron blocking layer can reduce the energy barrier between the light-emitting layer and the electron blocking layer to a certain extent, solve the problem of carrier imbalance in the device, and provide more space for regulating and balancing the carriers in the device. For example, not only can the first and second compounds be appropriately matched to form an effective energy level match (preferably, HOMO 第一化合物 >HOMO 第二化合物 ); a gradient setting of hole mobility can also be formed by applying the first and second compounds with different hole mobilities to different organic layers (preferably, the hole mobility of the first organic layer is greater than that of the second organic layer). On the basis of ensuring low voltage and high efficiency of the device, the life of the device is effectively improved or the capacitance of the device is reduced, and it has a wide range of application prospects.

[0350] It should be understood that the various embodiments described herein are only examples and are not intended to limit the scope of the present invention. Therefore, as will be apparent to those skilled in the art, the claimed invention may include variations of the specific embodiments and preferred embodiments described herein. Many of the materials and structures described herein may be replaced with other materials and structures without departing from the spirit of the present invention. It should be understood that the various theories about why the present invention works are not intended to be restrictive.

Claims

1. An organic electroluminescent device, comprising: anode, cathode, A light-emitting layer is provided between the anode and the cathode, A first organic layer and a second organic layer disposed between the anode and the light-emitting layer; in, The first organic layer comprises a first compound, and the second organic layer comprises a second compound; Characterized in that the first compound has a structure represented by Formula 1 or Formula 2, and the second compound has a structure represented by Formula 1; the first compound and the second compound have different structures from each other; in, In Formula 1, Ar1 has a structure represented by Formula 1-a or Formula 1-a': A r1 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; X1 is selected from CR in the same or different way each time it appears a or N; Q1 is selected, identically or differently, at each occurrence from C or Si; Y1 is selected from C, CR, or b or N; L1, L1', L1", L1'' are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; R1, R1', R a , R b The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R1, R1', R a , R b can optionally be linked to form a ring; represents the position where the formula 1-a or formula 1-a' is connected to the L1' in formula 1; In Formula 2, Ar2 has a structure represented by Formula 2-a or Formula 2-a': A r2 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; X2 is selected from CR in the same or different way each time it appears c or N; Y2 is selected from C, CR, or the like at each occurrence d or N; Q2 is selected, at each occurrence, identically or differently, from C or Si; L2, L2', L2", L2'', each occurrence of which is identical or different, is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; R2, R2', R c , R d The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; The adjacent substituents R2, R2', R c , R d can optionally be linked to form a ring; It represents the position where the formula 2-a or formula 2-a' is connected to the L2' in formula 2.

2. The organic electroluminescent device according to claim 1, wherein: The first compound and / or the second compound has a structure represented by Formula 1-1: Wherein, Ar1 has a structure represented by Formula 1-a-1: A r1 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; X1 is selected from CR in the same or different way each time it appears a or N; Y1 is selected from C, CR, or b or N; Each time Z1-Z4 appears, they are selected from CR e ; L1', L1" are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; R1, R1', R a , R b , R e The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R1, R1', R a , R b , R e can optionally be linked to form a ring; It represents the position where the formula 1-a-1 is connected to the L1' in the formula 1-1.

3. The organic electroluminescent device according to claim 1, wherein: The first compound and / or the second compound has a structure represented by any one of Formula 1-b to Formula 1-g: A r1 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; X1 is selected from CR in the same or different way each time it appears a or N; Y1 is selected from CR in the same or different way each time it occurs b or N; Each time Z0-Z4 appears, it is selected from CR e ; R1, R1', R a , R b , R e The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R1, R1', R a , R b , R e can optionally be linked to form a ring; Preferably, the first compound and / or the second compound has a structure represented by Formula 1-b, Formula 1-c or Formula 1-d.

4. The organic electroluminescent device according to claim 1, wherein: The first compound has a structure represented by Formula 2-1: Ar2 has a structure represented by Formula 2-a-1: A r2 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; X2 is selected from CR in the same or different way each time it appears c or N; Y2 is selected from C, CR, or the like at each occurrence d or N; Each time Z5-Z8 appears, it is selected from CR in the same or different way. f ; L2', L2" are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; R2, R2', R c , R d , R f The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; The adjacent substituents R2, R2', R c , R d , R f can optionally be linked to form a ring; It represents the position where the formula 2-a-1 is connected to the L2' in the formula 2-1.

5. The organic electroluminescent device according to any one of claims 1 to 4, wherein: The L1, L1', L1", L1'", L2, L2', L2", L2'' are selected from a single bond, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof, when each occurs; Preferably, each occurrence of L1, L1', L1", L1'', L2, L2', L2", L2'' is identically or differently selected from substituted or unsubstituted phenylene, substituted or unsubstituted biphenylene, substituted or unsubstituted terphenylene, substituted or unsubstituted naphthylene, substituted or unsubstituted fluorenylene, substituted or unsubstituted silylfluorenylene, substituted or unsubstituted carbazolylene, substituted or unsubstituted dibenzofuranylene, substituted or unsubstituted dibenzothiophenylene, substituted or unsubstituted dibenzoselenopheneylene, substituted or unsubstituted phenanthrenylene, substituted or unsubstituted triphenylene, substituted or unsubstituted pyridinylene, substituted or unsubstituted spirobifluorenylene, substituted or unsubstituted anthrylene, substituted or unsubstituted pyrenylene, or a combination thereof; More preferably, each occurrence of L1, L1', L1", L1'", L2, L2', L2", L2'" is identically or differently selected from substituted or unsubstituted phenylene, or substituted or unsubstituted biphenylene.

6. The organic electroluminescent device according to claim 1, wherein: The first compound has a structure represented by any one of Formula 2-b to Formula 2-g: A r2 ' is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; X2 is selected from CR in the same or different way each time it appears c or N; Y2 is selected from CR in the same or different manner at each occurrence d or N; Each time Z5-Z9 appears, it is selected from CR in the same or different way. f ; R2, R2', R c , R d , R f The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2-20 carbon atoms, a substituted or unsubstituted aryl group having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3-30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3-20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6-20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3-20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6-20 carbon atoms, a substituted or unsubstituted amino group having 0-20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; The adjacent substituents R2, R2', R c , R d , R f Can optionally be linked to form a ring.

7. The organic electroluminescent device according to any one of claims 1 to 6, wherein: R1, R2 are identical or different at each occurrence and are selected from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, or a combination thereof; Preferably, R1, R2 are identically or differently selected from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms at each occurrence; More preferably, R1, R2 are selected from substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted fluorenyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophenyl at each occurrence, the same or different.

8. The organic electroluminescent device according to claim 6, wherein: R1, R1', R a , R b , R e , R2, R2', R c , R d , R f each occurrence is identically or differently selected from hydrogen, deuterium, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, or a combination thereof; the adjacent substituents R2, R2', R c , R d , R f can optionally be linked to form a ring; Preferably, R1, R1′, R a , R b , R e , R2, R2', R c , R d , R f Each occurrence is identically or differently selected from hydrogen, deuterium, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, or a combination thereof.

9. The organic electroluminescent device according to any one of claims 1 to 6, wherein: The Ar1', Ar2' are selected from substituted or unsubstituted aryl groups having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 20 carbon atoms, or a combination thereof; Preferably, Ar1' and Ar2' are selected from substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted fluorenyl, substituted or unsubstituted silylenyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophene, substituted or unsubstituted dibenzoselenophene, substituted or unsubstituted phenanthryl, substituted or unsubstituted triphenylene, substituted or unsubstituted pyridyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted anthracenyl, substituted or unsubstituted pyrene, or a combination thereof.

10. The organic electroluminescent device according to claim 1, wherein: Ar1', Ar2' each time appearing, identically or differently, are selected from the group consisting of G1 to G75: and / or said Ar1, Ar2 are identically or differently selected from the group consisting of G26 to G70 each time they appear.

11. The organic electroluminescent device according to claim 1, wherein: The first compound and / or the second compound is selected from the group consisting of Compound C1 to Compound C54:

12. The organic electroluminescent device according to claim 1, wherein: The first compound is selected from the group consisting of Compound D1 to Compound D53:

13. The organic electroluminescent device according to any one of claims 1 to 12, wherein: The first organic layer and the second organic layer are hole transport layers or electron blocking layers; preferably, the first organic layer and the second organic layer are both electron blocking layers, and the first compound and the second compound are electron blocking materials.

14. The organic electroluminescent device according to any one of claims 1 to 13, wherein: The second organic layer is disposed on the first organic layer; preferably, the first organic layer is in direct contact with the second organic layer; more preferably, the light-emitting layer is in direct contact with the second organic layer.

15. The organic electroluminescent device according to claim 1 or 14, wherein: The anode and the light-emitting layer further include a third organic layer and / or a fourth organic layer; Preferably, the third organic layer and / or the fourth organic layer is disposed between the anode and the first organic layer.

16. An organic electroluminescent device according to claim 14 or 15, wherein: The second organic layer is disposed on the first organic layer, the hole mobility of the first organic layer is μ1, the hole mobility of the second organic layer is μ2, and μ1>μ2; Preferably, μ1≥17×10 -5 cm 2 / Vs,μ2<17×10 -5 cm 2 / Vs; More preferably, μ1≥20×10 -5 cm 2 / Vs,μ2<15×10 -5 cm 2 / Vs.

17. An organic electroluminescent device according to claim 14 or 15, wherein: The second organic layer is disposed on the first organic layer, and the HOMO of the first compound in the first organic layer is HOMO 第一化合物 , the HOMO of the second compound in the second organic layer is HOMO 第二化合物 , HOMO 第一化合物 >HOMO 第二化合物 ; Preferably, HOMO 第一化合物 ≥-5.170eV; More preferably, HOMO 第一化合物 ≥-5.165eV,HOMO 第二化合物 <-5.170eV.

18. The organic electroluminescent device according to claim 1, wherein: The total thickness of the first organic layer and the second organic layer is between 5 nm and 150 nm, preferably between 30 nm and 120 nm, and more preferably between 40 nm and 100 nm.

19. The organic electroluminescent device according to claim 1 or 18, wherein: The thickness of the first organic layer accounts for 20%-80% of the total thickness of the first organic layer and the second organic layer; Preferably, the thickness of the first organic layer accounts for 50%-70% of the total thickness of the first organic layer and the second organic layer.

20. The organic electroluminescent device according to claim 1, wherein: The light-emitting layer further comprises at least one phosphorescent light-emitting material.

21. An electronic component comprising the organic electroluminescent device according to any one of claims 1 to 20.

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