Organic light-emitting device

Abstract

Disclosed is an organic electroluminescent device. The organic light-emitting device comprises an anode, a cathode, a light-emitting layer arranged between the anode and the cathode, and a first organic layer arranged between the anode and the light-emitting layer, and the first organic layer at least comprises a first compound with a structure of a formula 1 and a second compound with a structure of a formula 1 or a formula 2, the first compound and the second compound have different structures from each other. The first organic layer containing the first compound and the second compound can be used as an electron blocking layer or a hole transport layer in the electroluminescent device, so that the organic electroluminescent device has more excellent device performance, and especially the service life is remarkably prolonged. The invention also discloses an electronic assembly comprising the organic electroluminescent device. Also disclosed is a compound combination comprising a first compound having a structure of Formula 1 and a second compound having a structure of Formula 1 or Formula 2, and the structures of the first compound and the second compound being different from each other.

Description

Technical Field

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

[0002] Organic electroluminescent devices (OLEDs) are stacked by cathodes, anodes, and a series of organic light-emitting materials between the cathodes and anodes. Organic electroluminescent devices 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 includes 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). 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 fields of display and lighting after decades of development.

[0003] 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. In order to obtain devices with better overall performance, common improvement methods include: developing new device structures or developing new compounds with better performance. In addition, the combination of different materials in the organic layer also has an important influence on the device performance. A combination of materials with better matching performance can balance the carriers in the device and is more conducive to charge transfer. Therefore, it is also crucial to pay attention to the matching and interaction between organic materials and to develop new material combinations that can be applied to specific organic functional layers.

[0004] KR20170100698A discloses a method having The invention discloses a compound of a general structure and discloses the application of the compound of the general structure alone as a hole transport layer material of a device. It does not disclose or teach the application of the compound together with other compounds of specific structures in a specific functional layer of an electroluminescent device, and does not pay attention to what technical effect a device containing a combination of compounds of specific structures will produce.

[0005] Patent CN103137879B discloses an organic light-emitting diode and a flat-panel display device containing a multi-hole transport layer. Although the patent discloses a device containing a plurality of compounds of different structures in the hole transport layer, it does not disclose a device containing a specific compound having a silylated arylamine skeleton structure and a novel material combination having a silylated arylamine skeleton structure in the same organic layer between the anode and the light-emitting layer, and does not pay attention to what technical effect the device containing the specific compound combination will produce.

[0006] In order to improve the efficiency and life of OLED devices, reduce device voltage, and obtain better device performance, in addition to developing new organic materials with better performance, choosing what kind of structural compounds to match and combine to obtain a material combination with better performance matching each other so that it can obtain better comprehensive performance when applied to specific organic functional layers is also a technical problem that researchers in this field need to solve urgently. Summary of the invention

[0007] 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 arranged between the anode and the light-emitting layer, wherein the first organic layer comprises at least a first compound having a structure of Formula 1 and a second compound having a structure of Formula 1 or Formula 2, and the first compound and the second compound have different structures from each other. The first organic layer comprising the first and second compounds of the present invention can be used as an electron blocking layer or a hole transport layer in an electroluminescent device, which can make the organic electroluminescent device have better device performance, especially achieve a significant improvement in lifespan.

[0008] According to one embodiment of the present invention, an organic electroluminescent device is disclosed, comprising:

[0009] anode,

[0010] cathode,

[0011] A light-emitting layer is provided between the anode and the cathode,

[0012] a first organic layer disposed between the anode and the light-emitting layer,

[0013] Wherein, the first organic layer comprises a first compound and a second compound; the first compound and the second compound have different structures from each other;

[0014] The first compound has a structure represented by Formula 1, and the second compound has a structure represented by Formula 1 or Formula 2;

[0015]

[0016] In Formula 1, Ar1 has a structure represented by Formula 1-a or Formula 1-a':

[0017]

[0018] 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;

[0019] X1 is selected from CR in the same or different way each time it appears a or N;

[0020] Q1 is selected, identically or differently, at each occurrence from C or Si;

[0021] Y1 is selected from C, CR, or b or N;

[0022] 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;

[0023] R1, R1', R a , R bThe 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;

[0024] Adjacent substituents R1, R1', R a , R b can optionally be linked to form a ring;

[0025] represents the position where the formula 1-a or formula 1-a' is connected to the L1' in formula 1;

[0026]

[0027] In Formula 2, Ar2 has a structure represented by Formula 2-a or Formula 2-a':

[0028]

[0029] 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;

[0030] X2 is selected from CR in the same or different way each time it appears c or N;

[0031] Y2 is selected from C, CR, or the like at each occurrence d or N;

[0032] Q2 is selected, at each occurrence, identically or differently, from C or Si;

[0033] 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;

[0034] 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;

[0035] Adjacent substituents R2, R2', R c , R d can optionally be linked to form a ring;

[0036] It represents the position where the formula 2-a or formula 2-a' is connected to the L2' in formula 2.

[0037] According to another embodiment of the present invention, a compound composition is also disclosed, which comprises a first compound and a second compound, wherein the first compound and the second compound have different structures from each other, the first compound has a structure represented by Formula 1, and the second compound has a structure represented by Formula 1 or Formula 2;

[0038]

[0039] In Formula 1, Ar1 has a structure represented by Formula 1-a or Formula 1-a':

[0040]

[0041] Ar1 ' 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;

[0042] X1 is selected from CR in the same or different way each time it appears a or N;

[0043] Q1 is selected, identically or differently, at each occurrence from C or Si;

[0044] Y1 is selected from C, CR, or b or N;

[0045] 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;

[0046] 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;

[0047] Adjacent substituents R1, R1', R a , R b can optionally be linked to form a ring;

[0048] represents the position where the formula 1-a or formula 1-a' is connected to the L1' in formula 1;

[0049]

[0050] In Formula 2, Ar2 has a structure represented by Formula 2-a or Formula 2-a':

[0051]

[0052] 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;

[0053] X2 is selected from CR in the same or different way each time it appears c or N;

[0054] Y2 is selected from C, CR, or the like at each occurrence d or N;

[0055] Q2 is selected, at each occurrence, identically or differently, from C or Si;

[0056] 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;

[0057] 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;

[0058] Adjacent substituents R2, R2', Rc , R d can optionally be linked to form a ring;

[0059] It represents the position where the formula 2-a or formula 2-a' is connected to the L2' in formula 2.

[0060] According to another embodiment of the present invention, an electronic component is disclosed, which includes the organic electroluminescent device described in the above embodiment.

[0061] The novel organic electroluminescent device disclosed in the present invention comprises a cathode, an anode, a light-emitting layer, and a first organic layer arranged between the anode and the light-emitting layer. In particular, the first organic layer comprises a novel material combination consisting of a first compound having a structure of Formula 1 and a second compound having a structure of Formula 1 or Formula 2. The effective matching of the two materials having specific skeletons and different structures from each other can better balance the carriers in the device, improve the charge transfer effect in the device, obtain better comprehensive device performance, such as lower device voltage or higher current efficiency, and especially achieve a significant improvement in lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 This is a schematic diagram of the structure of a typical bottom-emitting organic electroluminescent device.

[0063] Figure 2 Schematic diagram of an organic electroluminescent device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0064] 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. A description of a protective layer can be found in U.S. Patent Application Publication No. 2004 / 0174116, which is incorporated by reference in its entirety.

[0065] The above layered structure is provided by way of non-limiting example. The functions of an OLED can be achieved by combining the various layers described above, or some layers can be omitted entirely. It can also include other layers not explicitly described. Within 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, a light-emitting layer can have two layers of different light-emitting materials to achieve a desired light-emitting spectrum.

[0066] 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. Devices manufactured according to embodiments of the present invention may be incorporated into various consumer products having 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, camcorders, viewfinders, micro displays, 3-D displays, vehicle displays, and taillights. The materials and structures described herein may also be used in other organic electronic devices listed above.

[0067] As used herein, "top" means farthest from the substrate, while "bottom" means closest to the substrate. Where a first layer is described as being "disposed" "on" a 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 be present between the first and second layers. For example, a cathode may be described as being "disposed" "on" an anode even though various organic layers are present between the cathode and the anode.

[0068] 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.

[0069] A typical bottom-emitting OLED device structure is as follows: Figure 1As shown. Among them, the OLED device 100 includes an anode layer 101, a hole injection layer (HIL) 102, a hole transport layer (HTL1) 103, an electron blocking layer (HTL2) 104, which can also be called a prime layer, a light-emitting layer (EML) 105, and a hole blocking layer (HBL) 106, and 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 to 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 preferably 2%-50% of the total thickness. This can ensure good hole transport characteristics without increasing the driving voltage. The light-emitting layer 105 can include a phosphorescent host, a phosphorescent luminescent material, or a fluorescent host, a fluorescent luminescent material. When the light-emitting layer 105 includes a host and a dopant (luminescent 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 can be In certain embodiments, 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, an 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 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 arranged 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 190 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.

[0070] 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.

[0071] 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.

[0072] A ligand may be referred to as "photoactive" when it is believed that the ligand directly contributes to the photoactive property of the emissive material. A ligand may be referred to as "ancillary" when it is believed that the ligand does not contribute to the photoactive property of the emissive material, but the ancillary ligand may alter the properties of the photoactive ligand.

[0073] It is believed that the internal quantum efficiency (IQE) of fluorescent OLEDs can exceed the 25% spin-statistical limit through delayed fluorescence. Delayed fluorescence can generally be divided into two types, namely P-type delayed fluorescence and E-type delayed fluorescence. P-type delayed fluorescence is generated by triplet-triplet annihilation (TTA).

[0074] On the other hand, E-type delayed fluorescence does not rely on the collision of two triplets, but on the conversion between triplet and singlet excited state. Compounds capable of producing E-type delayed fluorescence need to have a very small single-triplet gap for the conversion between energy states. Thermal energy can activate the transition from triplet back to singlet. This type of delayed fluorescence is also called thermally activated delayed fluorescence (TADF). The notable feature of TADF is that the delayed component increases with increasing temperature. If the reverse intersystem crossing (RISC) rate is fast enough to minimize the non-radiative decay by triplet, the fraction of backfilling singlet excited state may reach 75%. The total singlet fraction can be 100%, far exceeding the 25% of the spin statistics of the excitons generated by electricity.

[0075] The E-type delayed fluorescence feature can be seen in an exciplex system or a single compound. Without being bound by theory, it is believed that the E-type delayed fluorescence requires the luminescent material to have a small singlet-triplet energy gap (ΔE S-T ). Organic non-metal-containing donor-acceptor luminescent materials may be able to achieve this. The emission of these materials is usually characterized by donor-acceptor charge transfer (CT) type emission. The spatial separation of the HOMO and LUMO in these donor-acceptor type compounds usually produces a small ΔE S-T These states may include CT states. Generally, donor-acceptor light-emitting materials are constructed by linking an electron donor moiety (eg, an amino group or a carbazole derivative) to an electron acceptor moiety (eg, a six-membered aromatic ring containing N).

[0076] Definition of Substituent Terms

[0077] Halogen or halide - as used herein includes fluorine, chlorine, bromine and iodine.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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,

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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:

[0100]

[0101] 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:

[0102]

[0103] 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:

[0104]

[0105] 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:

[0106]

[0107] According to one embodiment of the present invention, an organic electroluminescent device is disclosed, comprising:

[0108] anode,

[0109] cathode,

[0110] A light-emitting layer is provided between the anode and the cathode,

[0111] a first organic layer disposed between the anode and the light-emitting layer,

[0112] Wherein, the first organic layer comprises a first compound and a second compound; the first compound and the second compound have different structures from each other;

[0113] Characterized in that the first compound has a structure represented by Formula 1, and the second compound has a structure represented by Formula 1 or Formula 2;

[0114]

[0115] In Formula 1, Ar1 has a structure represented by Formula 1-a or Formula 1-a':

[0116]

[0117] 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;

[0118] X1 is selected from CR in the same or different way each time it appears a or N;

[0119] Q1 is selected, identically or differently, at each occurrence from C or Si;

[0120] Y1 is selected from C, CR, or bor N;

[0121] 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;

[0122] 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;

[0123] Adjacent substituents R1, R1', R a , R b can optionally be linked to form a ring;

[0124] represents the position where the formula 1-a or formula 1-a' is connected to the L1' in formula 1;

[0125]

[0126] In Formula 2, Ar2 has a structure represented by Formula 2-a or Formula 2-a':

[0127]

[0128] 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;

[0129] X2 is selected from CR in the same or different way each time it appears c or N;

[0130] Y2 is selected from C, CR, or the like at each occurrence d or N;

[0131] Q2 is selected, at each occurrence, identically or differently, from C or Si;

[0132] 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;

[0133] 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;

[0134] Adjacent substituents R2, R2', R c , R d can optionally be linked to form a ring;

[0135] It represents the position where the formula 2-a or formula 2-a' is connected to the L2' in formula 2.

[0136] In this context, “adjacent substituents R1, R1′, R a , 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 aBetween 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.

[0137] 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.

[0138] According to an embodiment of the present invention, the first compound has a structure represented by Formula 1, and the second compound has a structure represented by Formula 2.

[0139] 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.

[0140] According to one embodiment of the present invention, wherein the R1 is not an amino group.

[0141] 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.

[0142] 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.

[0143] According to one embodiment of the present invention, the first compound and / or the second compound has a structure represented by Formula 1-1:

[0144]

[0145] Wherein, Ar1 has a structure represented by Formula 1-a-1:

[0146]

[0147] 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;

[0148] X1 is selected from CR in the same or different way each time it appears a or N;

[0149] Y1 is selected from C, CR, or b or N;

[0150] Each time Z1-Z4 appears, they are selected from CR e ;

[0151] 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;

[0152] 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;

[0153] 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.

[0154] 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.

[0155] 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

[0156] The structure represented by any one of formulas 1-g:

[0157]

[0158] 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;

[0159] X1 is selected from CR in the same or different way each time it appears a or N;

[0160] Y1 is selected from CR in the same or different way each time it occurs b or N;

[0161] Each time Z0-Z4 appears, it is selected from CR e ;

[0162] R1, R1', R a , R b , R eThe 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;

[0163] Adjacent substituents R1, R1', R a , R b , R e Can optionally be linked to form a ring.

[0164] 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.

[0165] According to one embodiment of the present invention, the second compound has a structure represented by Formula 2-1:

[0166]

[0167] Ar2 has a structure represented by Formula 2-a-1:

[0168]

[0169] 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;

[0170] X2 is selected from CR in the same or different way each time it appears c or N;

[0171] Y2 is selected from C, CR, or the like at each occurrence d or N;

[0172] Each time Z5-Z8 appears, it is selected from CR in the same or different way. f ;

[0173] 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;

[0174] 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;

[0175] 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.

[0176] 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 d Between two adjacent substituents R2', between adjacent substituents R2' and Rd 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.

[0177] 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.

[0178] 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.

[0179] 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.

[0180] According to one embodiment of the present invention, the second compound has a structure represented by any one of Formula 2-b to Formula 2-g:

[0181]

[0182]

[0183] 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;

[0184] X2 is selected from CR in the same or different way each time it appears c or N;

[0185] Y2 is selected from CR in the same or different manner at each occurrence d or N;

[0186] Each time Z5-Z9 appears, it is selected from CR in the same or different way. f ;

[0187] 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;

[0188] Adjacent substituents R2, R2', R c , R d , R f Can optionally be linked to form a ring.

[0189] 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.

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] According to one embodiment of the present invention, wherein Ar1', Ar2' each time appear, are identically or differently selected from the group consisting of G1 to G75:

[0197]

[0198]

[0199] 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.

[0200] 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.

[0201] 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.

[0202] According to one embodiment of the present invention, the second 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.

[0203] According to one embodiment of the present invention, the first organic layer is a hole transport layer or an electron blocking layer.

[0204] According to an embodiment of the present invention, the first organic layer is an electron blocking layer, and the first compound and the second compound are electron blocking materials.

[0205] According to one embodiment of the present invention, the organic electroluminescent device further comprises a hole injection layer, a hole transport layer, and an electron blocking layer between the anode and the light-emitting layer; the first organic layer is the electron blocking layer, and the first compound and the second compound are electron blocking materials.

[0206] According to an embodiment of the present invention, the first organic layer is in direct contact with the light-emitting layer.

[0207] According to an embodiment of the present invention, the thickness of the first organic layer is between 5 nm and 150 nm.

[0208] According to an embodiment of the present invention, the thickness of the first organic layer is between 30 nm and 120 nm.

[0209] According to an embodiment of the present invention, the thickness of the first organic layer is between 40 nm and 100 nm.

[0210] According to an embodiment of the present invention, the first organic layer is formed by co-evaporation of the first compound and the second compound, and the first compound and the second compound exist in the first organic layer in the form of a mixture.

[0211] According to an embodiment of the present invention, in the first organic layer, the mass ratio of the first compound to the second compound is between 1% and 99%.

[0212] According to an embodiment of the present invention, in the first organic layer, the mass ratio of the first compound to the second compound is between 10% and 90%.

[0213] According to an embodiment of the present invention, in the first organic layer, the mass ratio of the first compound to the second compound is between 20% and 80%.

[0214] According to an embodiment of the present invention, in the first organic layer, the mass ratio of the first compound to the second compound is between 50% and 70%.

[0215] According to an embodiment of the present invention, the light-emitting layer further comprises at least one phosphorescent material.

[0216] 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.

[0217] 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

[0218] Wherein, the metal M is selected from metals with a relative atomic mass greater than 40;

[0219] 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;

[0220] L a , L b and L c can optionally be linked to form a multidentate ligand;

[0221] 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;

[0222] Ligand L a It has a structure as shown in Formula 3:

[0223]

[0224] in,

[0225] Ring D is selected from a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;

[0226] 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;

[0227] Ring D and Ring F via U a and U b condense;

[0228] U a and U b is selected identically or differently at each occurrence from C or N;

[0229] R' d , R' f Each occurrence of the same or different means mono-, poly- or no-substitution;

[0230] U1-U4 are selected from CR in the same or different way each time they appear. u or N;

[0231] R' d , R' f , R uThe 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;

[0232] Adjacent substituent R' d , R' f , R u can optionally be linked to form a ring;

[0233] Ligand L b , L c Each occurrence is identically or differently selected from the group consisting of:

[0234]

[0235] in,

[0236] R a1 , R b1 and R c1 Each occurrence is identical or different and indicates mono-, poly-, or unsubstituted;

[0237] X b Each occurrence is identically or differently selected from the group consisting of: O, S, Se, NR N1 and CR X1 R X2 ;

[0238] X c and X d Each occurrence is identically or differently selected from the group consisting of: O, S, Se and NR N2 ;

[0239] 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;

[0240] Adjacent substituent R a1 , R b1 , R c1 , R N1 , R N2 , R X1 and R X2 Can optionally be linked to form a ring.

[0241] 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 uAny 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.

[0242] 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 b1 and 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:

[0243] Wherein W is selected from O, S, Se, NR w or CR w R w ; wherein said Rw , R a ', R b ' is defined in the same way as R a1 Obviously, these substituents may not be connected to form a ring.

[0244] According to one embodiment of the present invention, in Formula 3, the two R' f Connect into a ring.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] 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.

[0253] According to one embodiment of the present invention, in Formula 3, R' d , R' f , R uAt 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 u A similar situation occurs when more groups of adjacent substituents are connected to form a ring.

[0254] According to one embodiment of the present invention, the ligand L b Has the following structure:

[0255]

[0256] Among them, R Ⅰ To R Ⅶeach 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.

[0257] 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.

[0258] 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 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.

[0259] According to one embodiment of the present invention, RⅠ -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.

[0260] 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.

[0261] 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.

[0262] 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.

[0263] 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.

[0264] 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:

[0265]

[0266]

[0267]

[0268] 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:

[0269]

[0270]

[0271] 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:

[0272]

[0273]

[0274]

[0275]

[0276]

[0277]

[0278]

[0279]

[0280]

[0281]

[0282] According to one embodiment of the present invention, a compound composition is also disclosed, which comprises a first compound and a second compound, wherein the first compound and the second compound have different structures from each other, the first compound has a structure represented by Formula 1; the second compound has a structure represented by Formula 1 or Formula 2; the first compound may be any of the aforementioned embodiments, and the second compound may be any of the aforementioned embodiments.

[0283] 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.

[0284] According to an embodiment of the present invention, the electronic component is a display component or a lighting component.

[0285] Combination with other materials

[0286] 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.

[0287] 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 compound combinations disclosed herein can be used in combination with a variety of light-emitting 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.

[0288] In the embodiment of material synthesis, unless otherwise stated, all reactions are carried out under nitrogen protection. All reaction solvents are anhydrous and used as they are from commercial sources. The synthetic product uses one or more conventional equipment in the art (including but not limited to Bruker's nuclear magnetic resonance instrument, Shimadzu's liquid chromatograph, liquid chromatography-mass spectrometer, gas chromatography-mass spectrometer, differential scanning calorimeter, Shanghai Lingguang Technology's fluorescence spectrophotometer, Wuhan Cost's electrochemical workstation, Anhui Bei Yi Ke's sublimator, etc.), and the structure is confirmed and the characteristics are tested by methods well known to those skilled in the art. In the embodiment of the device, the characteristics of the device are also tested by methods well known to those skilled in the art using conventional equipment in the art (including but not limited to Angstrom Engineering's evaporation machine, Suzhou Fushida's optical test system, life test system, Beijing Liangtuo's ellipsometer, etc.). Since those skilled in the art are aware of the use of the above-mentioned equipment, test methods and other related contents, it is possible to obtain the inherent data of the sample with certainty and without being affected, so the above-mentioned related contents are no longer expanded in this patent.

[0289] 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.

[0290] The organic electroluminescent device of the present invention may include a charge injection and transport layer, 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 organic layer of the present invention is preferably used as a hole transport layer or an electron blocking layer.

[0291] 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 a limitation. Those 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 those skilled in the art can reasonably select within a certain range based on the prior art. In the embodiment 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 Fusida, the ellipsometer produced by Beijing Liangtuo, etc.), using methods familiar to those skilled in the art. Since those skilled in the art are aware of the use of the above-mentioned equipment, test methods and other related contents, they can obtain the inherent data of the sample with certainty and without being affected, so the above-mentioned related contents will not be elaborated in this patent.

[0292] The area between the anode and the light-emitting layer of an organic electroluminescent device is generally called a hole transport region. The hole transport region often uses compounds with excellent hole transport capabilities to reduce the driving voltage of the device, but excessive hole injection and transport can also cause an imbalance of carriers in the device, thereby reducing the life of the device. In order to further improve the performance of OLEDs, the present invention provides a device that simultaneously contains a first compound having a structure of Formula 1 and a second compound having a structure of Formula 1 or Formula 2 in a specific organic layer between the anode and the light-emitting layer. This device structure that contains a combination of multiple compounds with different structural properties in the same organic layer can balance the carriers in the device to a certain extent by utilizing the combination of materials with specific structures without increasing the total number of organic layers of the OLED device, thereby effectively improving the life of the device and maintaining the low voltage and high efficiency of the device.

[0293] In particular, when a functional layer in the device contains two or more organic materials, the multiple organic materials can be placed in crucibles separately for co-evaporation to form a composite material layer; or a premixed form can be used, that is, the materials used in the same layer are mixed in advance according to a certain proportion and then placed in a crucible for evaporation. The premixed method can save the number of crucibles, but it is necessary to screen out two materials with similar evaporation temperatures to ensure that the materials are evaporated according to the set proportion during evaporation.

[0294] Hereinafter, the present invention will be described in more detail with reference to the following examples. Obviously, the following examples are only for illustrative purposes and are not intended to limit the scope of the present invention. Based on the following examples, those skilled in the art can obtain other embodiments of the present invention by improving them.

[0295] Device Embodiment

[0296] Device Example 1: Preparation of an organic electroluminescent device 200, such as Figure 2 shown.

[0297] 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, 98:2, )202, evaporate compound H-1 on the HIL to serve as a hole transport layer (HTL, )203, then, the first compound C53 and the second compound D2 of the present invention are co-evaporated on the hole transport layer as the first organic layer (ie, the electron blocking layer EBL, 1:1, )204, then, compound RH and compound RD are co-deposited as an emitting layer (EML, 97:3, )205, compound ET and Liq co-deposited as electron transport layer (ETL, 2:3, )206, evaporation Liq as the electron injection layer (EIL) 207, followed by evaporation of metal aluminum (Al, ) as the cathode 208, and the device is then returned to the glove box and encapsulated with a glass cover sheet 209 to complete the device.

[0298] Device Example 2: The device preparation method of Example 2 is the same as that of Example 1, with the only difference being that in the first organic layer, the first compound is replaced by compound C52, and the second compound is replaced by compound D53.

[0299] Device Example 3: The device preparation method of Example 3 is the same as that of Example 1, with the only difference being that in the first organic layer, the first compound is replaced by compound C10, and the second compound is replaced by compound D53.

[0300] Device Example 4: The device preparation method of Example 4 is the same as that of Example 1, with the only difference being that in the first organic layer, the first compound is replaced by compound C52, and the second compound is replaced by compound C54.

[0301] Device Example 5: The device preparation method of Example 5 is the same as that of Example 1, with the only difference being that in the first organic layer, the first compound is replaced by compound C52, and the second compound is replaced by compound C53.

[0302] Device Example 6: The device preparation method of Example 6 is the same as that of Example 1, with the only difference being that in the first organic layer, the first compound is replaced by compound C10, and the second compound is replaced by compound C53.

[0303] Device Comparative Example 1: The device preparation method of Comparative Example 1 is the same as that of Example 1, except that the first organic layer is formed by evaporation of compound C53 with a thickness of

[0304] Device Comparative Example 2: The device preparation method of Comparative Example 2 is the same as that of Example 1, except that the first organic layer is formed by evaporation of compound D2 with a thickness of

[0305] Device Comparative Example 3: The device preparation method of Comparative Example 3 is the same as that of Example 1, except that the first organic layer is formed by evaporation of compound C52 with a thickness of

[0306] Device Comparative Example 4: The device preparation method of Comparative Example 4 is the same as that of Example 1, except that the first organic layer is formed by evaporation of compound D53 with a thickness of

[0307] Device Comparative Example 5: The device preparation method of Comparative Example 5 is the same as that of Example 1, except that the first organic layer is formed by evaporation of compound C10 with a thickness of

[0308] Device Comparative Example 6: The device of Comparative Example 6 was prepared in the same manner as in Example 1, with the only difference being that in the first organic layer, the second compound D2 was replaced by a compound A not of the present invention.

[0309] Device Comparative Example 7: The device preparation method of Comparative Example 7 is the same as that of Example 1, with the only difference being that in the first organic layer, the first compound C53 is replaced by compound A not of the present invention.

[0310] Device Comparative Example 8: The device preparation method of Comparative Example 8 is the same as that of Example 2, with the only difference being that in the first organic layer, the first compound C52 is replaced by compound A not of the present invention.

[0311] Device Comparative Example 9: The device of Comparative Example 9 was prepared in the same manner as in Example 1, with the only difference being that in the first organic layer, the second compound D2 was replaced by a compound B not of the present invention.

[0312] Device Comparative Example 10: The device preparation method of Comparative Example 10 is the same as that of Example 2, with the only difference being that in the first organic layer, the first compound C52 is replaced by a compound B not of the present invention.

[0313] Device Comparative Example 11: The device preparation process of Comparative Example 11 is consistent with that of Example 1, with the only difference being that in the first organic layer, the first compound C53 is replaced by a compound B not of the present invention.

[0314] The detailed structures and thicknesses of the hole transport layer and the first organic layer (ie, electron blocking layer) of the device are shown in Table 1. The layers using more than one material are obtained by doping different compounds in the weight ratios recorded therein.

[0315] Table 1 Partial device structures of device embodiments 1-6 and comparative examples 1-11

[0316]

[0317]

[0318] The structure of the materials used in the device is shown below:

[0319]

[0320]

[0321] Table 2 summarizes the device performance of Examples 1-6 and Comparative Examples 1-11. 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 driving brightness to decay to 95% of the initial brightness.

[0322] Table 2 Device performance of device embodiments 1-6 and comparative examples 1-11

[0323]

[0324]

[0325] Table 2 shows the test results of organic electroluminescent devices containing different structural materials in the first organic layer. From the color coordinate data, it can be seen that the color coordinates of the embodiment shown are basically consistent with those of the comparative example.

[0326] As shown in Table 1, device embodiments 1-3 are devices of the present invention that simultaneously contain a first compound having a structure of Formula 1 and a second compound having a structure of Formula 2 in the first organic layer. Device embodiments 4-6 are devices of the present invention that simultaneously contain a first and a second compound composition that both have a skeleton of Formula 1 but have different structures in the first organic layer. It can be seen from the device performance data in Table 2 that the device embodiments of the present invention exhibit better device performance, especially in terms of life span. Specifically:

[0327] Compared with the comparative example in which the first organic layer contains only a single organic material, such as the comparative example 1 using only the first compound (C53) as the first organic layer, the voltage of Example 1 is greatly reduced by 0.6V, and in particular, the life span is significantly improved by 66%. Compared with the comparative example 2 using only the second compound D2 as the first organic layer, Example 1 also achieves a significant improvement of 12% in life span.

[0328] Compared with Comparative Examples 3 and 4 using a single material in the first organic layer, the device Example 2 of the present invention also achieved a significant improvement in lifespan, and the lifespan was improved by 8% compared with Comparative Example 3 (using only the first compound C52 as the first organic layer), and improved by 64% compared with Comparative Example 4 (using the second compound D53 as the first organic layer). Similarly, the device Example 3 of the present invention also achieved a significant improvement in lifespan compared with Comparative Examples 5 and 4 using a single material in the first organic layer, which were improved by 13% and 62%, respectively.

[0329] Similarly, the device embodiments 4-6 of the present invention (the first and second compounds in the first organic layer are both selected from the structure of Formula 1) have a lifespan in the range of 347h-359h, which also shows a significant improvement in device lifespan compared to device comparison examples 1, 3, and 5 using only a single material in the first organic layer (lifespan in the range of 211h-320h).

[0330] The above results show that compared with devices containing only one material in the first organic layer, the present invention can better balance the carriers in the device by applying a new compound combination of a first compound having a structure of Formula 1 and a second compound having a structure of Formula 1 or Formula 2 to a specific first organic layer, which is beneficial to the charge transfer in the device and makes the device have better overall performance, especially achieving a significant improvement in lifespan.

[0331] Compared with the device in which the first organic layer contains a combination of a compound of Formula 1 or Formula 2 which is not of the present invention, the device embodiment of the present invention also achieves better device performance. For example, compared with Comparative Examples 6 and 9 (where the first organic layer uses a first compound of Formula 1 of the present invention and a second compound which is not of the present invention), the device embodiment 1 of the present invention significantly reduces the voltage by 0.8V and 1.5V, respectively, and achieves a significant increase in lifespan by 15 times and 1.7 times.

[0332] Similarly, compared with Comparative Examples 7 and 11 (where the first organic layer uses a first compound not of the present invention in combination with the second compound of the present invention), the overall performance of the device of Example 1 is greatly improved. For example, the voltage is significantly reduced by 0.6V and 0.8V, respectively, and the CE is also improved by 10% and 5%. In particular, the lifespan is significantly improved by 5 times and 1.5 times, respectively.

[0333] Compared with Comparative Examples 8 and 10 (the first organic layer uses a first compound not of the present invention and a second compound of the present invention), the voltage of Example 2 is greatly reduced by 0.7V and 1.2V, the CE is increased by 8% and 3%, and the life is greatly increased by 58 times and 1.6 times. Compared with Comparative Examples 8 and 10, the voltage of Example 3 is reduced by 0.7V and 0.6V, the CE is increased by 8% and 3%, and the life is increased by 57 times and 1.6 times, respectively.

[0334] Similarly, the device embodiments 4-6 of the present invention (the first and second compounds in the first organic layer are both selected from the structure of Formula 1) have a lifespan in the range of 347h-359h, which shows a significant improvement in lifespan compared with the device comparison examples 6 and 9 (lifespan in the range of 6h-240h) containing a combination of compounds not of the present invention in the first organic layer, with the improvement being at least 1.4 times, and some even as high as 60 times.

[0335] The above results show that the device of the present invention, which contains a first compound having a structure of Formula 1 and a second compound having a structure of Formula 1 or Formula 2 in the first organic layer, exhibits better device performance than the device using a compound combination not of the present invention in this layer, especially achieving an unexpectedly significant improvement in device life.

[0336] In summary, the novel electroluminescent device of the present invention, which contains a compound combination of a first compound having a structure of Formula 1 and a second compound having a structure of Formula 1 or Formula 2 in the first organic layer between the light-emitting layer and the anode, can obtain device performance with better overall performance, such as lower voltage or higher efficiency, and in particular, achieves a significant improvement in lifespan, whether compared with a device having a single organic material in the layer or a device having a compound composition not of the present invention in the layer.

[0337] 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 disposed between the anode and the light-emitting layer, in, The first organic layer includes a first compound and a second compound; the first compound and the second compound have different structures from each other; Characterized in that the first compound has a structure represented by Formula 1, and the second compound has a structure represented by Formula 1 or Formula 2; wherein, 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; 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 second 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 second 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; 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 second 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 is a hole transport layer or an electron blocking layer; preferably, the first organic layer is an electron blocking layer, and the first compound and the second compound are electron blocking materials.

14. The organic electroluminescent device according to claim 1, wherein: The first organic layer is in direct contact with the light emitting layer.

15. The organic electroluminescent device according to claim 1, wherein: The thickness of the first 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.

16. The organic electroluminescent device according to claim 1, wherein: The mass ratio of the first compound to the second compound is between 20% and 80%, and preferably, the mass ratio of the first compound to the second compound is between 50% and 70%.

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

18. An electronic component comprising the organic electroluminescent device according to any one of claims 1 to 17.

19. A compound composition comprising a first compound and a second compound, wherein the first compound and the second compound have different structures from each other, wherein: The first compound has a structure represented by Formula 1, and the second compound has a structure represented by Formula 1 or Formula 2; 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; 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.

Images