CN113549023A - Organic compound and application thereof - Google Patents

Organic compound and application thereof Download PDF

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CN113549023A
CN113549023A CN202110981741.2A CN202110981741A CN113549023A CN 113549023 A CN113549023 A CN 113549023A CN 202110981741 A CN202110981741 A CN 202110981741A CN 113549023 A CN113549023 A CN 113549023A
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冉佺
张磊
高威
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Wuhan Tianma Microelectronics Co Ltd
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Abstract

The invention provides an organic compound and application thereof, the compound has deeper LUMO energy level, can reduce the potential barrier of electron transmission, improve the injection capability of electrons, and effectively reduce the voltage of an OLED device; the compounds have deeper HOMO energy levels, which can effectively block holes, so that more holes-electrons are combined in a light emitting region, and higher light emitting efficiency can be realized. The organic light emitting diode is suitable for an electron transport layer and/or a hole blocking layer material of an OLED device, can reduce the voltage and power consumption of the device, improves the light emitting efficiency, prolongs the service life and enables the OLED device to have better comprehensive performance.

Description

Organic compound and application thereof
Technical Field
The invention belongs to the technical field of organic electroluminescent materials, and relates to an organic compound and application thereof.
Background
The electron transport material used in conventional electroluminescent devices is Alq3, but the electron mobility ratio of Alq3 is relatively low (approximately at l 0)-6cm2Vs) such that electron transport and hole transport of the device are not balanced. With the commercialization and practicability of electroluminescent devices, it is desirable to obtain ETL materials with higher transmission efficiency and better usability, and researchers have done a great deal of exploratory work in this field.
WO 2007/011170 Al and CN 101003508a in LG chemistry disclose a series of derivatives of naphthoimidazoles and pyrenes, respectively, for use as electron transport and injection materials in electroluminescent devices to improve the luminous efficiency of the devices.
Kodak discloses in publications US 2006/0204784 and US 2007/0048545 organic electroluminescent devices of a hybrid electron transport material doped with: (a) a first compound having a lowest LUMO level in the layer, (b) a second compound having a LUMO level higher than that of the first compound and having a low turn-on voltage; a metal material having a work function of less than 4.2 eV. However, the electron transport material has a planar molecular structure and a large intermolecular attraction, which is not favorable for vapor deposition and application; in addition, the electron transport material also has the defects of low mobility, poor energy level matching, poor thermal stability, short service life, doping property and the like, and further development of the OLED display device is limited.
Therefore, the electron transport material and/or the electron injection material which are stably and efficiently designed and developed, have high electron mobility and high glass transition temperature, and are effectively doped with metal Yb or Liq are/is designed, the threshold voltage is reduced, the device efficiency is improved, the service life of the device is prolonged, and the method has important practical application value.
Most of the electron transport materials currently used in the market, such as batho-phenanthroline (BPhen), Bathocuproine (BCP) and TmPyPB, can substantially meet the market demand of organic electroluminescent panels, but their glass transition temperature is low, generally less than 85 ℃, and the generated joule heat during device operation can cause molecular degradation and change of molecular structure, resulting in low panel efficiency and poor thermal stability. Meanwhile, the molecular structure is symmetrical regularly, and the crystal is easy to crystallize after a long time. Once the electron transport material is crystallized, the intermolecular charge jump mechanism is different from the normal amorphous thin film mechanism, resulting in the decrease of electron transport performance, the imbalance of electron and hole mobility of the whole device, the great decrease of exciton formation efficiency, and the concentration of exciton formation at the interface of the electron transport layer and the light emitting layer, resulting in the serious decrease of device efficiency and lifetime.
Therefore, there is a need in the art to develop a wider variety of electron transport materials with higher performance to meet the application requirements of OLED display devices.
Disclosure of Invention
In view of the shortcomings of the prior art, the present invention aims to provide an organic compound and its application.
In order to achieve the purpose, the invention adopts the following technical scheme:
one of the objects of the present invention is to provide an organic compound having a structure represented by the following formula I:
Figure BDA0003229370480000021
wherein ring A is selected from the group consisting of a substituted or unsubstituted C6-C20 aryl ring, a substituted or unsubstituted C5-C30 heteroaryl ring;
l is selected from a single bond, substituted or unsubstituted aryl of C6-C20, and substituted or unsubstituted heteroaryl of C5-C30;
X1-X3independently selected from C or N atoms, and at least one is N;
R1、R2independently selected from substituted or unsubstituted aryl of C6-C30, substituted or unsubstituted heteroaryl of C5-C30;
n1is an integer of 1 to 3.
In the invention, the C6-C20 can be C6, C9, C10, C12, C13, C14, C15, C16, C18, C19 and the like independently.
The C5-C30 may be C6, C7, C8, C9, C10, C12, C13, C14, C15, C16, C18, C20, C22, C24, C26, C28, C29, etc. independently.
The C6-C30 may be C7, C8, C9, C10, C12, C13, C14, C15, C16, C18, C20, C22, C24, C26, C28, C29, etc. each independently.
The organic compound provided by the invention simultaneously contains
Figure BDA0003229370480000031
The mutual matching of the skeleton structure and the substituent group ensures that the compound has a deeper LUMO energy level, is beneficial to reducing the potential barrier of electron injection, improves the electron injection capability and can effectively reduce the voltage of the OLED device; the HOMO energy level and the LUMO energy level are proper, so that the energy level matching of adjacent layers is facilitated, and the deeper HOMO energy level enables the adjacent layers to have hole blocking capability; more holes-electrons are recombined in the light emitting region, and higher light emitting efficiency can be realized.
It is a further object of the present invention to provide an electron transport layer material comprising an organic compound according to the first object.
It is a further object of the present invention to provide a hole blocking layer material comprising an organic compound according to one of the objects.
It is a fourth object of the present invention to provide an OLED device comprising an anode, a cathode and an organic thin film layer between the anode and the cathode, the material of the organic thin film layer comprising at least one of the organic compounds according to one of the objects.
The fifth object of the present invention is to provide a display panel including the OLED device of the fourth object.
The sixth object of the present invention is to provide an electronic device, which includes the display panel according to the fifth object.
Compared with the prior art, the invention has the following beneficial effects:
the compound has a deeper LUMO energy level, can reduce the potential barrier of electron transmission, improves the injection capability of electrons, and effectively reduces the voltage of an OLED device; the compounds have deeper HOMO energy levels, which can effectively block holes, so that more holes-electrons are combined in a light emitting region, and higher light emitting efficiency can be realized. The organic light emitting diode is suitable for an electron transport layer and/or a hole blocking layer material of an OLED device, can reduce the voltage and power consumption of the device, improves the light emitting efficiency, prolongs the service life and enables the OLED device to have better comprehensive performance.
Drawings
FIG. 1 is a schematic structural diagram of an OLED device provided by the present invention;
among them, 101-anode, 102-cathode, 103-light emitting layer, 104-first organic thin film layer, 105-second organic thin film layer.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
One of the objects of the present invention is to provide an organic compound having a structure represented by the following formula I:
Figure BDA0003229370480000051
wherein ring A is selected from the group consisting of a substituted or unsubstituted C6-C20 aryl ring, a substituted or unsubstituted C5-C30 heteroaryl ring;
l is selected from a single bond, substituted or unsubstituted aryl of C6-C20, and substituted or unsubstituted heteroaryl of C5-C30;
X1-X3independently selected from C or N atoms, and at least one is N;
R1、R2independently selected from substituted or unsubstituted aryl of C6-C30, substituted or unsubstituted heteroaryl of C5-C30;
n1is an integer of 1 to 3.
In the invention, the C6-C20 can be C6, C9, C10, C12, C13, C14, C15, C16, C18, C19 and the like independently.
The C5-C30 may be C6, C7, C8, C9, C10, C12, C13, C14, C15, C16, C18, C20, C22, C24, C26, C28, C29, etc. independently.
The C6-C30 may be C7, C8, C9, C10, C12, C13, C14, C15, C16, C18, C20, C22, C24, C26, C28, C29, etc. each independently.
The organic compound provided by the invention simultaneously contains
Figure BDA0003229370480000052
The mutual matching of the skeleton structure and the substituent group ensures that the compound has a deeper LUMO energy level, is beneficial to reducing the potential barrier of electron injection, improves the electron injection capability and can effectively reduce the voltage of the OLED device; the HOMO energy level and the LUMO energy level are proper, so that the energy level matching of adjacent layers is facilitated, and the deeper HOMO energy level enables the adjacent layers to have hole blocking capability; more holes-electrons are recombined in the light emitting region, and higher light emitting efficiency can be realized. Glass transition temperature T of the materialgThe film has high thermal stability, and can be made to be in an amorphous film form during evaporation, so that the influence of Joule heat generated by the device during operation on the service life and efficiency of the device can be avoided.
In one embodiment, the organic compound has the structure shown in formula II below:
Figure BDA0003229370480000061
in the present invention, the connection mode shown in formula II is preferable, and in this case
Figure BDA0003229370480000062
The flatness of the triphenylene is better than that of the central triphenylene, so that the triphenylene is more beneficial to the transmission of electrons, the mobility of the triphenylene is more matched with that of the hole transport layer, and the charge balance is improved so as to achieve higher luminous efficiency; and in the position, two sides of the central benzophenanthrene are in symmetrical positions, so that raw materials and subsequent synthesis are more favorably obtained, and the mass production is favorably realized.
In one embodiment, when the substituted or unsubstituted aryl ring of C6-C20, the substituted or unsubstituted aryl group of C6-C30, and the substituted or unsubstituted heteroaryl group of C5-C30 contain a substituent, the substituent is at least one of deuterium, cyano, halogen, unsubstituted or halogenated C-C (e.g., C or C) straight-chain or branched alkyl, unsubstituted or halogenated C-C (e.g., C or C) alkoxy, C-C (e.g., C or C) alkylthio, C-C (e.g., C or C, etc.) aryl, C-C (e.g., C or C, etc.) heteroaryl, or C-C (e.g., C or C, etc.) arylamine.
In one embodiment, the a ring is any one of phenylene, biphenylene, naphthylene, terphenylene, pyridylene, and phenylene-naphthylene.
In one embodiment, L is selected from any one of phenylene, biphenylene, naphthylene, terphenylene, and pyridylene.
In one embodiment, X1-X3Wherein both are N or X1-X3Are all N.
In one embodiment, R1、R2Independently selected from any one of the following groups:
Figure BDA0003229370480000071
wherein the dotted line represents the attachment site of the group;
L1any one selected from a single bond and substituted or unsubstituted arylene groups having from C6 to C20 (e.g., C6, C9, C10, C12, C14, C16, or C18);
X4selected from O, S, NRN1；
X5Selected from O, S, NRN2Or CRC3RC4；
RN1、RN2、RC3、RC4Each independently selected from hydrogen, substituted or unsubstituted C1-C20 (e.g., C2, C3, C4, C5, C6, C8, C10, C12, C14, C16, C18 or C19) straight chain or branched chain alkyl, substituted or unsubstituted C6-C20 (e.g., C6, C9, C10, C12, C14, C16 or C18) aryl, substituted or unsubstituted C5-C20 (e.g., C6, C8, C10, C12, C38 14, C16 or C18) heteroaryl;
R11、R12each independently selected from deuterium, cyano, halogen, unsubstituted or halogenated C1 to C10 (e.g., C1, C2, C3, C4, C5, C6, C7, C8, C9 or C10) straight-chain or branched alkyl, unsubstituted or halogenated C1 to C10 (e.g., C1, C2, C3, C4, C5, C6, C7, C8, C9 or C10) alkoxy, C1 to C10 (e.g., C1, C2, C3, C4, C5, C6, C7, C8, C9 or C10) alkylthio, C6 to C20 (e.g., C6, C8, C10, C12, C14, C16 or C16) aryl, C16 to C16 (e.g., C16 or C16) heteroaryl;
m1an integer selected from 0 to 5; for example, it may be 0, 1, 2, 3, 4 or 5.
m2The integer selected from 0 to 6 is, for example, 0, 1, 2, 3, 4, 5 or 6.
m3The integer selected from 0 to 9 is, for example, 0, 1, 2, 3, 4, 5, 6, 7, 8 or 9.
m4、m6Each independently selected from integers of 0 to 4, such as 0, 1, 2, 3 or4。
m5The integer selected from 0 to 3 is, for example, 0, 1, 2 or 3.
In one embodiment, said R is1、R2Independently selected from any one of the following substituted or unsubstituted groups:
Figure BDA0003229370480000081
Figure BDA0003229370480000091
wherein the dotted line represents the attachment site of the group;
the substituted substituents are each independently selected from deuterium, cyano, halogen, unsubstituted or halogenated C1-C10 (e.g. C1, C2, C3, C4, C5, C6, C7, C8, C9 or C10) straight-chain or branched alkyl, unsubstituted or halogenated C1-C10 (e.g. C1, C2, C3, C4, C5, C6, C7, C8, C9 or C10) alkoxy, C1-C10 (e.g. C1, C2, C3, C4, C5, C6, C7, C8, C9 or C10) alkylthio, C6-C6 (e.g. C6, C6 or C6 (e.g. C6) aryl, C6, at least one of arylamine.g. at least one, C6, and the like.
In one embodiment, the organic compound is selected from any one of the following compounds:
Figure BDA0003229370480000101
Figure BDA0003229370480000111
Figure BDA0003229370480000121
Figure BDA0003229370480000131
Figure BDA0003229370480000141
Figure BDA0003229370480000151
Figure BDA0003229370480000161
it is a further object of the present invention to provide an electron transport layer material comprising an organic compound according to the first object.
It is a further object of the present invention to provide a hole blocking layer material comprising an organic compound according to one of the objects.
It is a fourth object of the present invention to provide an OLED device comprising an anode, a cathode and an organic thin film layer between the anode and the cathode, the material of the organic thin film layer comprising at least one of the organic compounds according to one of the objects.
In one embodiment, the organic thin film layer comprises an electron transport layer, the material of which comprises at least one of the organic compounds according to one of the objects.
In one embodiment, the organic thin film layer includes a hole blocking layer, and a material of the hole blocking layer includes an organic compound according to one of the objects.
In the OLED device provided by the invention, the anode material can be metal, metal oxide or conductive polymer; wherein the metal includes copper, gold, silver, iron, chromium, nickel, manganese, palladium, platinum, etc., and alloys thereof, the metal oxide includes Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc oxide, Indium Gallium Zinc Oxide (IGZO), etc., and the conductive polymer includes polyaniline, polypyrrole, poly (3-methylthiophene), etc. In addition to the above materials and combinations thereof that facilitate hole injection, known materials suitable for use as anodes are also included.
In the OLED device, the cathode material can be metal or a multi-layer metal material; wherein the metal comprises aluminum, magnesium, silver, indium, tin, titanium and the like and alloys thereof, and the multilayer metal material comprises LiF/Al, LiO2/Al, BaF2/Al and the like. In addition to the above materials and combinations thereof that facilitate electron injection, known materials suitable for use as cathodes are also included.
In the OLED device, the organic thin film layer comprises at least one light emitting layer (EML) and any one or a combination of at least two of a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), an Electron Blocking Layer (EBL), a Hole Blocking Layer (HBL), an Electron Transport Layer (ETL) or an Electron Injection Layer (EIL) which are arranged on two sides of the light emitting layer. The hole/electron injecting and transporting layer may be a carbazole-based compound, an arylamine-based compound, a benzimidazole-based compound, a metal compound, or the like, in addition to the organic compound described as one of the objects of the present invention. A cap layer (CPL) may optionally be provided on the cathode (the side remote from the anode) of the OLED device.
The schematic diagram of the OLED device is shown in fig. 1, and includes an anode 101 and a cathode 102, a light emitting layer 103 disposed between the anode 101 and the cathode 102, a first organic thin film layer 104 and a second organic thin film layer 105 disposed on two sides of the light emitting layer 103, where the first organic thin film layer 104 is any 1 or a combination of at least 2 of a Hole Injection Layer (HIL), a Hole Transport Layer (HTL), or an Electron Blocking Layer (EBL), and the second organic thin film layer 105 includes any 1 or a combination of at least 2 of a Hole Blocking Layer (HBL), an Electron Transport Layer (ETL), or an Electron Injection Layer (EIL); a cap layer (CPL) may optionally be provided on the cathode 102 (on the side remote from 105).
The OLED device can be prepared by the following method: an anode is formed on a transparent or opaque smooth substrate, an organic thin layer is formed on the anode, and a cathode is formed on the organic thin layer. Among them, known film forming methods such as evaporation, sputtering, spin coating, dipping, ion plating, and the like can be used to form the organic thin layer.
The fifth object of the present invention is to provide a display panel including the OLED device of the fourth object.
The sixth object of the present invention is to provide an electronic device, which includes the display panel according to the fifth object.
In the invention, the organic compound with the structure shown in the formula I can be prepared by the following synthetic route:
Figure BDA0003229370480000181
wherein, X1、X2、X3、Y1、Y2、L、R1、R2、A、n1Having the same limits as in formula I; y is selected from halogen (e.g. fluorine, chlorine, bromine or iodine).
Several preparation examples of the organic compounds according to the invention are listed below by way of example:
preparation examples: preparation of Compounds 1-9
(1)
Figure BDA0003229370480000191
Under nitrogen atmosphere, in a reaction flask with toluene: ethanol: adding a reaction solvent according to the proportion of 7:2:1, and then sequentially adding K2CO3(10mmol) aq, reactant A-1(5mmol), reactant a-1(5mmol), and Pd (PPh)3)4(0.25mmol), the temperature was raised to 80 ℃ and the reaction was carried out overnight. After the reaction was complete, the reaction mixture was cooled to room temperature, extracted with dichloromethane/H2O, and the collected organic phase was extracted with anhydrous Na2SO4Drying, collecting filtrate by suction filtration, removing solvent by rotation, and purifying by column chromatography to obtain intermediate B-1 (yield 70%).
MALDI-TOF (m/z): calcd for C39H24ClN3: 569.17, found: 569.40.
(2)
Figure BDA0003229370480000192
adding 1, 4-dioxane into a reaction bottle under the nitrogen atmosphere, and then sequentially adding K2CO3(8mmol) aq, intermediate reactant B-1(4mmol), reactant B-1(4mmol), and Pd (PPh)3)4(0.2mmol), the temperature was raised to 100 ℃ and the reaction was carried out overnight. After the reaction was complete, the reaction mixture was cooled to room temperature, extracted with dichloromethane/H2O, and the collected organic phase was extracted with anhydrous Na2SO4Drying, collecting the filtrate by suction filtration, removing the solvent by rotation, and purifying by column chromatography to obtain compound 1 (yield 71%).
MALDI-TOF (m/z): calcd for C46H28N4: 636.23, found: 636.49.
elemental analysis (%): calcd for C46H28N4: c86.77, H4.43, N8.80; test values are: c86.78, H4.42, N8.82.
The following intermediates/products were synthesized following a similar procedure as described above:
Figure BDA0003229370480000201
the following intermediates/products were synthesized following a similar procedure as described above:
Figure BDA0003229370480000202
Figure BDA0003229370480000211
simulated calculation of compound energy levels:
with respect to the organic compound provided by the embodiment of the invention, the molecular front line orbitals HOMO and HOMO are obtained by optimization and calculation under the calculation level of B3LYP/6-31G (d) by the Guassian 09 package (Guassian Inc.) by using the Density Functional Theory (DFT)The distribution of LUMO, and the lowest singlet state energy level S of compound molecules is calculated based on time-containing density functional theory (TD-DFT) simulation1And the lowest triplet level T1The results are shown in table 1 below.
TABLE 1
Compound (I) HOMO(eV) LUMO(eV) ES1(eV) ET1(eV)
Compound 1 -5.85 -1.95 3.52 2.61
Compound 2 -5.81 -1.95 3.52 2.61
Compound 3 -5.71 -1.93 3.50 2.61
Compound 4 -5.72 -1.92 3.44 2.60
Compound 5 -5.87 -1.96 3.50 2.61
Compound 6 -5.83 -1.94 3.52 2.61
Compound 7 -5.68 -1.85 3.53 2.61
Compound 8 -5.70 -1.87 3.53 2.61
Compound 9 -5.61 -1.77 3.54 2.61
As can be seen from Table 1, the compounds provided by the invention have deeper LUMO energy level (-1.79 to-1.96 eV), can reduce the potential barrier of electron transport, improve the injection capability of electrons, and effectively reduce the voltage of OLED devices; the compounds all have a deeper HOMO energy level (-5.61 to-5.87 eV), which can effectively block holes, so that more holes-electrons are combined in a light emitting region, and higher light emitting efficiency can be realized.
The following are some examples of applications of the organic compounds of the present invention in OLED devices:
application example 1:
the present application example provides an OLED device, which has a structure as shown in fig. 1, and includes a substrate 1, an anode 2, a hole injection layer 3, a hole transport layer 4, an electron blocking layer 5, a light emitting layer 6, a hole blocking layer 7, an electron transport layer 8, an electron injection layer 9, and a cathode 10, which are sequentially stacked, where arrows in fig. 1 represent the light extraction direction of the device.
The specific preparation steps of the OLED device are as follows:
1) a glass substrate 1 with an Indium Tin Oxide (ITO) anode 2 (thickness 100nm) was sonicated in isopropanol and deionized water for 30 minutes, respectively, and then exposed to ozone for about 10 minutes to clean, and the cleaned glass substrate was mounted on a vacuum deposition apparatus;
2) a compound a is evaporated on the ITO anode 2 in vacuum, the thickness of the compound a is 10nm, and the compound a is used as a hole injection layer 3;
3) a compound b was vacuum-evaporated on the hole injection layer 3 to a thickness of 40nm to form a hole transport layer 4;
4) a compound c is evaporated in vacuum on the hole transport layer 4, and the thickness of the compound c is 10nm to be used as an electron blocking layer 5;
5) on the electron blocking layer 5, a compound d and a compound e are vacuum co-evaporated, the doping proportion is 5% (mass ratio), the thickness is 20nm, and the compound d and the compound e are used as a light emitting layer 6;
6) a compound f was vacuum-deposited on the light-emitting layer 6 to a thickness of 10nm as a hole-blocking layer 7;
7) on the hole-blocking layer 7, the compound 1 provided in preparation example 1 was vacuum-evaporated to a thickness of 30nm as an electron-transporting layer 8;
7) vacuum evaporating compound LiF with the thickness of 2nm on the electron transport layer 8 to form an electron injection layer 9;
8) on the electron injection layer 9, an aluminum electrode was vacuum-deposited to a thickness of 100nm as a cathode 10.
The compounds used in the preparation of the above-described OLED devices are as follows:
Figure BDA0003229370480000241
performance evaluation of OLED devices:
according to the current density and the brightness of the OLED device under different voltages, the current density (10 mA/cm) is obtained under a certain current density2) Operating voltage V and current efficiency CE (cd/A); the lifetime LT95(h) (at 50 mA/cm) was obtained by measuring the time at which the luminance of the OLED device reached 95% of the initial luminance2Under test conditions); the test data are shown in table 2.
TABLE 2
Figure BDA0003229370480000242
Figure BDA0003229370480000251
As can be seen from Table 2, the OLED devices of embodiments 1-8 provided by the present invention have lower driving voltage, higher luminous efficiency and longer device lifetime, wherein the operating voltage is less than or equal to 4.11V, the current efficiency CE is greater than or equal to 15.3cd/A, and the lifetime LT95 is greater than or equal to 63 h. Compared with comparative example 1, the working voltage of examples 1 to 8 using the compound of the present invention is reduced, the efficiency and the lifetime are improved, which may be benefited by the deeper LUMO level of the organic compound 1 to 8 of the present invention, so that the electron injection is more smooth, thereby reducing the working voltage of the device; the organic light emitting diode has a deeper HOMO value, can effectively block holes, limits the holes in a light emitting region to be combined with electrons, is beneficial to widening the light emitting composite region, and improves the light emitting efficiency of a device. Meanwhile, the organic compound provided by the invention has good thermal stability and film-forming property, is beneficial to the stability of devices, and prolongs the service life of the devices. In the OLED device example 9 of the compound of the present invention, the electron injection barrier may be too high and the device voltage may increase due to the insufficient LUMO level of the compound 9; and the electron transmission is slow, so that the hole-electron recombination forms fewer excitons, and the luminous efficiency is reduced.
The applicant states that the present invention is illustrated by the above examples of the organic compounds of the present invention and their applications, but the present invention is not limited to the above examples, i.e. it is not meant that the present invention must rely on the above examples to be practiced. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.

Claims (16)

1. An organic compound having a structure represented by formula I:
Figure FDA0003229370470000011
wherein ring A is selected from the group consisting of a substituted or unsubstituted C6-C20 aryl ring, a substituted or unsubstituted C5-C30 heteroaryl ring;
l is selected from a single bond, substituted or unsubstituted aryl of C6-C20, and substituted or unsubstituted heteroaryl of C5-C30;
X1-X3independently selected from C or N atoms, and at least one is N;
R1、R2independently selected from substituted or unsubstituted aryl of C6-C30, substituted or unsubstituted heteroaryl of C5-C30;
n1is an integer of 1 to 3.
2. The organic compound of claim 1, wherein the organic compound has the structure of formula II:
Figure FDA0003229370470000012
3. the organic compound of claim 1, wherein the substituted or unsubstituted C6-C20 aryl ring, substituted or unsubstituted C6-C30 aryl group, and substituted or unsubstituted C5-C30 heteroaryl group contains a substituent selected from deuterium, cyano, halogen, unsubstituted or halogenated C1-C10 linear or branched alkyl group, unsubstituted or halogenated C1-C10 alkoxy group, C1-C10 alkylthio group, C6-C20 aryl group, C5-C20 heteroaryl group, and C6-C18 arylamine group.
4. The organic compound according to claim 1, wherein the ring A is any one of phenylene, biphenylene, naphthylene, terphenylene, pyridylene, and phenylene-naphthylene.
5. The organic compound according to claim 1, wherein L is selected from any one of phenylene, biphenylene, naphthylene, terphenylene, and pyridylene.
6. An organic compound according to claim 1, wherein X is1-X3Wherein both are N or X1-X3Are all N.
7. An organic compound according to claim 1, wherein R is1、R2Independently selected from any one of the following groups:
Figure FDA0003229370470000021
wherein the dotted line represents the attachment site of the group;
L1any one selected from single bond, substituted or unsubstituted C6-C20 arylene;
X4selected from O, S, NRN1；
X5Selected from O, S, NRN2Or CRC3RC4；
RN1、RN2、RC3、RC4Each independently selected from any one of hydrogen, substituted or unsubstituted C1-C20 straight chain or branched chain alkyl, substituted or unsubstituted C6-C20 aryl, and substituted or unsubstituted C5-C20 heteroaryl;
R11、R12each independently selected from any one of deuterium, cyano, halogen, unsubstituted or halogenated C1-C10 straight-chain or branched alkyl, unsubstituted or halogenated C1-C10 alkoxy, C1-C10 alkylthio, C6-C20 aryl, C5-C20 heteroaryl or C6-C18 arylamine;
m1an integer selected from 0 to 5;
m2an integer selected from 0 to 6;
m3an integer selected from 0 to 9;
m4、m6each independently selected from integers of 0 to 4;
m5an integer selected from 0 to 3.
8. The organic compound of claim 7, wherein R is1、R2Independently selected from any one of the following substituted or unsubstituted groups:
Figure FDA0003229370470000031
Figure FDA0003229370470000041
wherein the dotted line represents the attachment site of the group;
the substituted substituent groups are respectively and independently selected from at least one of deuterium, cyano, halogen, unsubstituted or halogenated C1-C10 straight-chain or branched alkyl, unsubstituted or halogenated C1-C10 alkoxy, C1-C10 alkylthio, C6-C20 aryl, C2-C20 heteroaryl or C6-C18 arylamine.
9. The organic compound according to claim 1, wherein the organic compound is any one of the following compounds:
Figure FDA0003229370470000051
Figure FDA0003229370470000061
Figure FDA0003229370470000071
Figure FDA0003229370470000081
Figure FDA0003229370470000091
Figure FDA0003229370470000101
Figure FDA0003229370470000111
10. an electron transport layer material comprising the organic compound according to any one of claims 1 to 9.
11. A hole blocking layer material, characterized in that it comprises an organic compound according to any one of claims 1 to 9.
12. An OLED device comprising an anode, a cathode and an organic thin film layer between the anode and the cathode, wherein the material of the organic thin film layer comprises at least one of the organic compounds according to any one of claims 1 to 9.
13. The OLED device of claim 12, wherein the organic thin film layer comprises an electron transport layer, and the material of the electron transport layer comprises at least one of the organic compounds of any one of claims 1 to 9.
14. The OLED device according to claim 13, wherein the organic thin film layer includes a hole blocking layer, and a material of the hole blocking layer includes the organic compound according to any one of claims 1 to 9.
15. A display panel characterized in that it comprises an OLED device according to any one of claims 12-14.
16. An electronic device characterized in that the electronic device comprises the display panel according to claim 15.
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