A deuterated composition, organic electroluminescent device and display device

Abstract

The present application provides a kind of deuterated composition, organic electroluminescent device and display device.The deuterated composition includes first component and second component, the first component includes at least two compounds each having the structure shown in formula I.The present application designs the specific composition of deuterated composition, and uses the deuterated composition as the organic thin film layer material of organic electroluminescent device, so that the organic electroluminescent device has lower driving voltage, higher current efficiency and longer service life.

Description

A deuterated composition, an organic electroluminescent device, and a display device Technical Field

[0001] This invention belongs to the field of organic electroluminescent materials technology, specifically relating to a deuterated composition, an organic electroluminescent device, and a display device. Background Technology

[0002] Currently, organic light-emitting diode (OLED) display technology has been applied in smartphones, tablets, and other fields, and will further expand to large-size applications such as televisions. Over the past 30 years of development, various high-performance OLED materials have been developed. Through different designs of device structures and optimization of device lifespan, efficiency, and other performance characteristics, the commercialization of OLEDs has been accelerated, leading to their widespread application in display and lighting fields.

[0003] The selection of materials for the hole layer, emissive layer, and other organic functional layers also significantly impacts the device's current efficiency, driving voltage, and lifetime. Currently, the exploration of functional layer materials with higher performance is ongoing. Therefore, to meet the increasingly demanding requirements for OLED devices, the field urgently needs to develop a wider variety of higher-performance OLED materials. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a deuterated composition, an organic electroluminescent device, and a display device. The deuterated composition provided by the present invention can be used as an organic thin film layer material for organic electroluminescent devices, thereby improving the performance of the organic electroluminescent devices.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, the present invention provides a deuterated composition comprising a first component and a second component, wherein the first component comprises at least two compounds, each having a structure as shown in Formula I.

[0007]

[0008] In this case, one of X and Y is N, and the other is CR;

[0009] R and Ar1 are each independently selected from any one of C6-C40 aryl and C3-C20 heteroaryl groups;

[0010] m and n are each independently selected from 0 or 1, and m and n are not both 0 at the same time;

[0011] In the compound shown in Formula I, each hydrogen atom can be independently substituted by at least one of -D, -F, -CN, C6-C20 aryl, C6-C20 heteroaryl, C1-C6 alkyl, and C1-C6 alkoxy.

[0012] The compound shown in Formula I meets at least one of the following conditions:

[0013] (1) The compound shown in Formula I does not contain deuterium atoms;

[0014] (2) In the compound shown in formula I All hydrogen atoms in the group are replaced by deuterium atoms;

[0015] (3) In the compound shown in Formula I, at least one hydrogen atom in the Ar1 group is replaced by a deuterium atom;

[0016] (4) In the compound shown in Formula I for Group;

[0017] (5) At least one hydrogen atom in the R group is replaced by a deuterium atom;

[0018] (6) In the compound shown in Formula I, the hydrogen atom is replaced by C6-C20 aryl or C6-C20 heteroaryl, and at least one hydrogen atom in C6-C20 aryl or C6-C20 heteroaryl is replaced by a deuterium atom;

[0019] (7) The hydrogen atoms in the compound shown in Formula I are replaced by C1-C6 alkyl or C1-C6 alkoxy atoms, and all hydrogen atoms in C1-C6 alkyl and C1-C6 alkoxy atoms are replaced by deuterium atoms.

[0020] The dashed lines represent connection points;

[0021] The first component includes at least one compound of formula I that meets at least one of conditions (2) to (7).

[0022] In this invention, by designing the structure of the compound and the composition of the deuterated composition, the obtained deuterated composition can be used as an organic thin film layer material for organic electroluminescent devices, thereby improving the performance of organic electroluminescent devices.

[0023] It should be noted that if m is 1 and n is 0 in this invention, then Ar1 is selected from C6-C40 aryl or C3-C20 heteroaryl; if both m and n are 1, then Ar1 is the corresponding disubstituted group, that is, Ar1 is selected from C6-C40 arylene or C3-C20 heteroarylene.

[0024] In this invention, C6-C40 can be C6, C8, C10, C12, C16, C20, C24, C28, C30, C32, C36 or C40, etc.

[0025] The C3-C20 can be C3, C6, C10, C12, C16, or C20, etc.

[0026] The C6-C20 can be C6, C8, C10, C12, C16, or C20, etc.

[0027] The C1-C6 can be C1, C2, C3, C4, C5, or C6.

[0028] In this invention, "D" represents a deuterium atom, and the same applies below.

[0029] In this invention, condition (3) is further preferably: when Ar1 in the compound shown in Formula I is selected from a single aromatic ring, such as phenylene or naphthylene, all hydrogen atoms on the single aromatic ring are replaced by deuterium atoms; when Ar1 in the compound shown in Formula I is composed of two or more aromatic rings, all hydrogen atoms on at least one aryl group are replaced by deuterium atoms, for example, when Ar1 is selected from biphenylene, all hydrogen atoms on at least one phenyl group are replaced by deuterium atoms; when Ar1 is selected from phenylene naphthalene, all hydrogen atoms on the phenyl and / or naphthyl groups are replaced by deuterium atoms.

[0030] In this invention, condition (5) is further preferably: when R in the compound shown in Formula I is selected from a single aromatic ring, such as phenyl or naphthyl, all hydrogen atoms on the phenyl or naphthyl group are replaced by deuterium atoms; when R in the compound shown in Formula I is composed of two or more aromatic rings, all hydrogen atoms on at least one aryl group are replaced by deuterium atoms, for example, when R is selected from biphenyl, all hydrogen atoms on at least one phenyl group are replaced by deuterium atoms; when R is selected from phenylnaphthalene, all hydrogen atoms on the phenyl and / or naphthyl groups are replaced by deuterium atoms.

[0031] In this invention, condition (6) is further preferably: when the C6-C20 aryl group in the compound of formula I is selected from a single aromatic ring, such as phenyl or naphthyl, all hydrogen atoms on the phenyl or naphthyl group are replaced by deuterium atoms; when the C6-C20 aromatic ring in the compound of formula I is composed of two or more aryl groups, all hydrogen atoms on at least one aryl group are replaced by deuterium atoms, for example, when the C6-C20 aryl group is selected from biphenyl, all hydrogen atoms on at least one phenyl group are replaced by deuterium atoms; when the C6-C20 aryl group is selected from phenylnaphthalene, all hydrogen atoms on the phenyl and / or naphthyl groups are replaced by deuterium atoms.

[0032] The following are preferred technical solutions of the present invention, but are not intended to limit the technical solutions provided by the present invention. The purpose and beneficial effects of the present invention can be better achieved and realized through the following preferred technical solutions.

[0033] As a preferred embodiment of the present invention, the C3-C20 heteroaryl group is selected from any one of nitrogen-containing heteroaryl groups, dibenzofuranyl, dibenzothiophene, naphthobenzofuranyl, or dibenzothiophene from C3-C20 (e.g., C3, C6, C10, C12, C16, or C20).

[0034] As a preferred embodiment of the present invention, R and Ar1 are each independently selected from any one of phenyl, biphenyl, naphthyl, phenanthryl, anthracene, fluorenyl, benzo[a]fluorenyl, dibenzo[a]fluorenyl, triphenylene, fluoranyl, pyrene, perylene, spirofluorenyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl, quinazolinyl, imidazolyl, benzimidazolyl, indo[a]fluorenyl, or hydrogenated benzirthalyl.

[0035] As a preferred embodiment of the present invention, R is selected from triphenylene, phenyl, naphthyl, diphenyl, 9,9-dimethylfluorenyl, fluoranyl, dibenzofuranyl, dibenzothiopheneyl, naphthobenzofuranyl, benzofluorenyl, spirofluorenyl, etc. At least one of them, with dashed lines indicating connection sites.

[0036] Preferably, Ar1 is selected from phenyl, naphthyl, diphenyl, 9,9-dimethylfluorenyl, dibenzofuranyl, dibenzothiopheneyl, 9,9-diphenylfluorenyl, spirofluorenyl, triphenylene, fluoranyl, etc. At least one of them.

[0037] It should be noted that if m and n are both 1 in the compound shown in Formula I of this invention, then Ar1 is a disubstituent of the above-mentioned group.

[0038] As a preferred embodiment of the present invention, the C6-C20 aryl group is selected from any one of phenyl, biphenyl, naphthyl, phenanthryl, anthracene, fluorenyl, benzo[a]fluorenyl, triphenylene, fluoranyl, pyrene, perylene, indo[a]fluorenyl, or hydrogenated benzo[a]anthryl.

[0039] Preferably, the C1-C6 alkyl group is selected from any one of methyl, ethyl, propyl, or butyl.

[0040] Preferably, the C1-C6 alkoxy group is selected from any one of methoxy, ethoxy, propoxy, or butoxy.

[0041] Preferably, the hydrogen atom in the compound represented by Formula I can be substituted by at least one of phenyl, methyl, tert-butyl, methoxy, -F, -CN, -D, diphenyl, 9,9-dimethylfluorenyl, dibenzothiophene, dibenzofuranyl, fluoranyl, triphenylene, and naphthyl.

[0042] As a preferred embodiment of the present invention, the compound of formula I is selected from any one of the following compounds, whether substituted or unsubstituted:

[0043]

[0044]

[0045]

[0046]

[0047]

[0048]

[0049]

[0050] The substitution refers to the fact that each hydrogen atom in the above compound can be independently replaced by a deuterium atom.

[0051] Specifically, the substitution refers to the substitution of the corresponding Ar1 or Ar2 in the above compounds. At least one hydrogen atom on an aryl group in one of the substituents is completely replaced by a deuterium atom; and / or in the above compounds All the hydrogen atoms on it are replaced by deuterium atoms.

[0052] Preferably, the first component comprises at least two of the following compounds:

[0053]

[0054] It should be noted that the present invention does not impose any special restrictions on the preparation method of the compound of formula I, and it can be prepared according to conventional technical means in the field.

[0055] As a preferred embodiment of the present invention, the second component includes compound A having the following structural formula;

[0056]

[0057] Among them, o, p, and q are each independently selected from 0 or 1;

[0058] When q is 1, Ar 001Selected from C6-C30 arylene or C6-C20 heteroarylene; when q is 0, Ar 001 Selected from C6-C30 aryl or C6-C20 heteroaryl;

[0059] Ar 002 Ar 003 Ar 102 Ar 103 Ar 202 Ar 203 Each is independently selected from C6-C30 aryl or C6-C20 heteroaryl;

[0060] Ar 101 Ar 201 Each is independently selected from any one of single bonds, C6-C30 arylene, or C6-C20 heteroarylene;

[0061] Ar 002 Ar 003 Ar can be connected into a ring using a single bond. 102 Ar 103 Ar can be connected into a ring using a single bond. 202 Ar 203 A ring can be formed by connecting with a single key; Ar 001 Ar 003 A ring can be formed by connecting with a single key; Ar 101 Ar 103 A ring can be formed by connecting with a single key; Ar 201 Ar 203 They can be connected in a ring using a single key;

[0062] Ring A and ring B are each independently selected from benzene ring and naphthalene ring;

[0063] In compound A, each hydrogen atom can be independently converted by -F, -D, -CN, C6-C20 aryl, C1-C6 alkyl, C1-C6 alkoxy, At least one substitution is used, and * indicates a connection site;

[0064] X7 is selected from C or Si;

[0065] R 701 R 702 R 703 Each is independently selected from C6-C20 aryl and C1-C6 alkyl groups, wherein R 701 R 702 R 703 When selected from C6 to C20 aryl groups, R 701 R 702 R 703 Any two elements can be linked together to form a ring using a single bond.

[0066] As a preferred technical solution of the present invention, the Ar 001 At least one mono- or di-substituted group selected from the following groups: phenyl, biphenyl, naphthyl, anthracene, phenanthrene, fluorene, triphenylene, fluoranthyl, spirofluorene, dibenzofuran, dibenzothiophene, naphthobenzofuran, naphthobenzothiophene, dinaphthofuran, dinaphthothiophene, indolefluorene, indolocarbazolyl, indolecarbazolyl, terphenyl, tetraphenyl, imidazolyl, benzimidazolyl, pyridinyl, pyrimidinyl, piperazine, quinolinyl, isoquinolinyl, quinoxalinyl, quinazolinyl, benzoquinoxalinyl, benzoquinazolinyl, azirphenanthrene, diazirphenanthrene, carbazolyl, benzocarbazolyl, naphthocarbazolyl, dibenzocarbazolyl, or triazinyl.

[0067] Preferably, the Ar 002 Ar 003 Ar 102 Ar 103 Ar 202 Ar 203 Each of the following is independently selected from any one or a combination of at least two of the following: phenyl, biphenyl, naphthyl, anthracene, phenanthryl, fluorenyl, triphenylene, fluoranyl, spirofluorenyl, dibenzofuranyl, dibenzothiopheneyl, naphthobenzofuran, naphthobenzothiophene, dinaphthofuran, dinaphthothiophene, indole-fluorenyl, indolocarbazoyl, indole-carbazoyl, terphenyl, tetraphenyl, imidazoyl, benzimidazolyl, pyridyl, pyrimidinyl, piperazine, quinolinyl, isoquinolinyl, quinoxalinyl, quinazolinyl, benzoquinoxalinyl, benzoquinazolinyl, azirphenyl, diazirphenyl, carbazoyl, benzocarbazoyl, naphthocarbazoyl, dibenzocarbazoyl, and triazinyl.

[0068] Preferably, the Ar 101 Ar 201 Each is independently selected from single bonds, phenylene, biphenylene, naphthylene, anthracene, phenanthrene, fluorene, triphenylene, fluorenylene, spirofluorene, dibenzofuranyl, dibenzothiophene, naphthanobenzofuran, naphthanobenzothiophene, dinaphthanofuran, dinaphthiophene, indole-fluorene, indole-carbazoyl, indole-carbazoyl, terphenylene, tetraphenylene The group consisting of any one or at least two of the following: yl, imidazolyl, benzimidazolyl, pyridinyl, pyrimidinyl, piperazine, quinolinyl, isoquinolinyl, quinoxalinyl, quinoxalinyl, benzoquinoxalinyl, benzoquinoxalinyl, benzoquinoxalinyl, diazaphenyl, carbazolyl, benzocarbazolyl, naphthocarbazolyl, dibenzocarbazolyl, and triazine.

[0069] As a preferred technical solution of the present invention, the Ar 001The group is selected from any one of the following mono- or di-substituted groups: phenyl, diphenyl, triphenyl, naphthyl, dibenzofuranyl, dibenzothiophenyl, carbazoyl, quinoxaline, quinazoline, or triazine.

[0070] Preferably, the Ar 101 Ar 102 Each is independently selected from one or a combination of at least two of the following: phenylene, diphenylene, terphenylene, naphthylene, dibenzofuranylene, dibenzothiophenylene, carbazoylene, quinoxaline, quinoxaline, and triazineylene.

[0071] Preferably, the Ar 002 Ar 003 Ar 103 Ar 201 Ar 202 Ar 203 Each is independently selected from one or a combination of at least two of phenyl, diphenyl, triphenyl, naphthyl, dibenzofuranyl, dibenzothiophenyl, carbazoyl, quinoxaline, quinazoline, and triazine.

[0072] Preferably, one of ring A and ring B is selected from naphthalene ring.

[0073] Preferably, the C6 to C20 aryl groups are selected from any one of phenyl, naphthyl, or biphenyl.

[0074] As a preferred embodiment of the present invention, compound A is selected from any one of the following substituted or unsubstituted compounds:

[0075]

[0076]

[0077]

[0078]

[0079]

[0080]

[0081]

[0082]

[0083]

[0084]

[0085]

[0086]

[0087] The substitution refers to the fact that each hydrogen atom in the above compound can be independently replaced by a deuterium atom.

[0088] It should be noted that in the above structures, when ring A or ring B is selected from a naphthalene ring, any C atom on the naphthalene ring that can participate in the bonding can participate in the bonding. Examples are given below for compounds with the following structural formulas:

[0089]

[0090] It includes, but is not limited to, the following structures:

[0091]

[0092] Preferably, compound A comprises the following compounds:

[0093]

[0094] It should be noted that the present invention does not impose any special restrictions on the preparation method of compound A, which can be prepared according to conventional techniques in the field.

[0095] In a second aspect, the present invention provides an organic electroluminescent device, the organic electroluminescent device comprising an anode, a cathode, and an organic thin film layer disposed between the anode and the cathode;

[0096] The organic thin film layer includes an electron transport layer, a light-emitting layer, a hole transport layer, and an electron blocking layer;

[0097] The material of the organic thin film layer includes the deuterated composition as described in the first aspect.

[0098] Preferably, the organic thin film layer includes a light-emitting layer, and the host material of the light-emitting layer includes the deuterated composition as described in the first aspect.

[0099] As a preferred embodiment of the present invention, the organic electroluminescent device is a red-light organic electroluminescent device.

[0100] Preferably, the organic electroluminescent device is a red phosphorescent organic electroluminescent device.

[0101] Thirdly, the present invention provides a display device comprising the organic electroluminescent device as described in the second aspect.

[0102] Compared with the prior art, the present invention has the following beneficial effects:

[0103] In this invention, by designing the structure of the compound and the specific composition of the deuterated composition, and further by selecting the joint use of deuterated compounds with specific structural formulas, and using this deuterated composition as the organic thin film layer material of the organic electroluminescent device, the organic electroluminescent device has a lower driving voltage, higher current efficiency and longer lifespan. Detailed Implementation

[0104] To facilitate understanding of the present invention, the following embodiments are provided. Those skilled in the art should understand that these embodiments are merely illustrative and should not be construed as limiting the scope of the invention.

[0105] The specific structures of the compounds used in the device embodiments of the present invention are shown below:

[0106]

[0107]

[0108] Device Example 1

[0109] This embodiment of the device provides an organic electroluminescent device, which uses the deuterated composition provided by the present invention as the red light host material in the organic electroluminescent device. The structure of the organic electroluminescent device is: ITO / HT-1 (20nm) / red light host material (35nm): Ir(piq)3 [10%] / TPBI (10nm) / Alq3 (15nm) / LiF (0.5nm) / Al (150nm). Wherein "Ir(piq)3 [10%]" refers to the doping ratio of red light dye, that is, the volume ratio of red light host material to Ir(piq)3 is 90:10.

[0110] The organic electroluminescent device fabrication process is as follows: a glass plate coated with an ITO transparent conductive layer is ultrasonically treated in a commercial cleaning agent, rinsed in deionized water, ultrasonically degreased in a mixed solvent of acetone and ethanol, baked in a clean environment until all moisture is removed, cleaned with ultraviolet light and ozone, and bombarded with a low-energy cation beam.

[0111] The glass substrate with the anode was placed in a vacuum chamber and evacuated to a vacuum level of 1×10⁻⁶. -5 ~9×10 -6 Pa, a hole transport layer HT-1 is vacuum-deposited on the above-mentioned anodic layer film at a deposition rate of 0.1 nm / s and a film thickness of 20 nm.

[0112] A red light-emitting host material and dye Ir(piq)3 were vacuum-deposited on a hole transport layer to serve as the light-emitting layer of an organic electroluminescent device. The deposition rate was 0.1 nm / s, and the total film thickness was 35 nm. In this embodiment, two compounds of the first component and one compound of the second component were placed in different evaporation sources and heated. The heating rate was controlled so that the volume ratio of the three compounds deposited on the substrate was 1:1:1, serving as the red light-emitting host material. In this embodiment, the first component of the red light-emitting host material consisted of compounds 1H and 1, and the second component consisted of compound H9-D2.

[0113] Electron transport layers TPBI and Alq3 were sequentially vacuum-deposited on top of the light-emitting layer at a deposition rate of 0.1 nm / s, with film thicknesses of 10 nm and 15 nm, respectively.

[0114] 0.5 nm of LiF was vacuum-deposited on the electron transport layer, and 150 nm of Al was used as the electron injection layer and cathode.

[0115] Device Examples 2-18

[0116] Device Examples 2-18 provide an organic electroluminescent device, which differs from Device Example 1 only in that the red light host material is different. The volume ratio of the two compounds in the first component of the red light host and the second component of the red light host deposited on the substrate is 1:1:1 (see Table 1 for details). Other preparation steps and conditions are the same as those in Device Example 1.

[0117] Device Comparison Examples 1-6

[0118] Comparative Examples 1-6 each provide an organic electroluminescent device. The only difference between them and Device Example 1 is that the first component of the red light host material is a single compound (see Table 1 below). The other preparation steps and conditions are the same as those in Device Example 1.

[0119] Device Comparison Example 7

[0120] This invention provides an organic electroluminescent device, which differs from device example 1 only in that the red light host material is different, as detailed in Table 1 below. Other preparation steps and conditions are the same as those in device example 1.

[0121] Performance testing:

[0122] The brightness, driving voltage, current efficiency, and lifetime (LT90) of the fabricated organic electroluminescent device were measured using an OLED-1000 multi-channel accelerated aging lifetime and photochromic performance analysis system manufactured by Hangzhou Yuanfang. The lifetime test (LT90) refers to maintaining a constant current density (1000 cd / m²) at room temperature (25–27°C) while retaining the initial brightness. 2 The time required for the brightness to decrease to 90% of the initial brightness. The driving voltage, current efficiency, and LT90 are relative values; detailed test data are shown in Table 1 below.

[0123] Table 1

[0124]

[0125]

[0126] As can be seen from the above, by designing the structure of the compound and the specific composition of the deuterated composition, and further by selecting the joint use of deuterated compounds with specific structural formulas, and using this deuterated composition as the organic thin film layer material of the organic electroluminescent device, the organic electroluminescent device has a lower driving voltage, higher current efficiency and longer lifespan.

[0127] Comparison of device example 1 with device comparative examples 1-2, device example 2 with device comparative examples 3-4, and device example 3 with device comparative examples 5-6 shows that the organic electroluminescent device prepared by the present invention using at least two compounds with specific structures as the first component of the red light host material has a lower driving voltage, higher current efficiency, and longer lifetime.

[0128] As can be seen from the relevant data of device examples 4-6, when the second component is compound H-16, the lifetime of the organic electroluminescent device can be further improved; when the second component is compound H-7D, the current efficiency of the organic electroluminescent device can be further improved.

[0129] A comparison of the relevant data from Device Examples 1-6 and Device Comparative Example 7 shows that by designing the first component and the second component together as the main red light material, the performance of the organic electroluminescent device can be further improved.

[0130] According to data from device examples 16-18, when the second component is selected from H-29, H-30, and H-31, the device lifetime is further improved.

[0131] In summary, by designing the specific composition of the deuterated composition and using it as the organic thin film layer material for organic electroluminescent devices, the present invention enables organic electroluminescent devices to have lower driving voltage, higher current efficiency, and longer lifespan.

[0132] The applicant declares that the detailed process flow of this invention is illustrated by the above embodiments, but this invention is not limited to the above detailed process flow, that is, it does not mean that this invention must rely on the above detailed process flow to be implemented. Those skilled in the art should understand that any improvements to this invention, equivalent substitutions of raw materials for the product of this invention, addition of auxiliary components, and selection of specific methods, etc., all fall within the protection scope and disclosure scope of this invention.

Claims

1. A deuterated composition, characterized in that, The deuterated composition includes a first component and a second component, wherein the first component includes at least two compounds, each having a structure as shown in Formula I; In this compound, either X or Y is N, and the other is CR; R is selected from at least one of triphenylene, phenyl, naphthyl, diphenyl, 9,9-dimethylfluorenyl, and fluoranyl; Ar1 ​​is selected from at least one of phenyl, naphthyl, and diphenyl; m is selected from 1, and n is selected from 0 or 1; the hydrogen atoms in the compound of formula I are each independently and optionally substituted by at least one of -D, -F, -CN, C1-C6 alkyl, and C1-C6 alkoxy; the compound of formula I meets at least one of the following conditions: (1) the compound of formula I does not contain deuterium atoms; (2) the compound of formula I contains deuterium atoms. (3) In the compound shown in Formula I, at least one hydrogen atom in the Ar1 group is replaced by a deuterium atom; (4) In the compound shown in Formula I, all hydrogen atoms in the Ar1 group are replaced by deuterium atoms; for Group; (5) at least one hydrogen atom in the R group is replaced by a deuterium atom; (6) the hydrogen atom in the compound shown in Formula I is replaced by a C1-C6 alkyl or C1-C6 alkoxy group, and all hydrogen atoms in the C1-C6 alkyl or C1-C6 alkoxy group are replaced by deuterium atoms; wherein, the dashed line indicates the connection site; the first component includes at least one Formula I compound that meets at least one of conditions (2) to (6); the second component includes compound A having the following structural formula: Where o, p, and q are each independently selected from 0 or 1; when q is 1, Ar 001 Selected from C6-C30 arylene or C6-C20 heteroarylene; when q is 0, Ar 001 Selected from C6-C30 aryl or C6-C20 heteroaryl; Ar 002 Ar 003 Ar 102 Ar 103 Ar 202 Ar 203 Each is independently selected from C6–C30 aryl or C6–C20 heteroaryl; Ar 101 Ar 201 Each is independently selected from any one of single bonds, C6-C30 arylene, or C6-C20 heteroarylene; Ar 002 Ar 003 Optional rings are formed by connecting with a single bond, Ar 102 Ar 103 Optional rings are formed by connecting with a single bond, Ar 202 Ar 203 Optional rings are formed by connecting with a single bond; Ar 001 Ar 003 Optional rings are formed by connecting with a single bond; Ar 101 Ar 103 Optional rings are formed by connecting with a single bond; Ar 201 Ar 203 Optionally linked into rings by single bonds; ring A and ring B are each independently selected from benzene rings and naphthalene rings; hydrogen atoms in compound A are each independently and optionally replaced by -F, -D, -CN, C6-C20 aryl, C1-C6 alkyl, C1-C6 alkoxy, At least one substitution is used, * indicates a connection site; X7 is selected from C or Si; R 701 R 702 R 703 Each is independently selected from C6-C20 aryl and C1-C6 alkyl groups, wherein R 701 R 702 R 703 When selected from C6 to C20 aryl groups, R 701 R 702 R 703 Any two of them can be connected in a ring by a single bond.

2. The deuterated composition according to claim 1, characterized in that, The C1-C6 alkyl group is selected from any one of methyl, ethyl, propyl, or butyl.

3. The deuterated composition according to claim 1, characterized in that, The C1-C6 alkoxy groups are selected from any one of methoxy, ethoxy, propoxy, or butoxy.

4. The deuterated composition according to claim 1 or 2, characterized in that, The hydrogen atoms in the compound represented by Formula I may optionally be substituted with at least one of methyl, tert-butyl, methoxy, -F, -CN, and -D.

5. The deuterated composition according to claim 1, characterized in that, The compound of formula I is selected from any one of the following compounds, substituted or unsubstituted: The substitution refers to the independent and optional replacement of each hydrogen atom in the above-mentioned compound with a deuterium atom.

6. The deuterated composition according to claim 5, characterized in that, The compound represented by Formula I is selected from the following compounds:

7. The deuterated composition according to claim 1, characterized in that, The Ar 001 At least one mono- or di-substituted group selected from the following groups: phenyl, biphenyl, naphthyl, anthracene, phenanthrene, fluorene, triphenylene, fluoranthyl, spirofluorene, dibenzofuran, dibenzothiophene, naphthobenzofuran, naphthobenzothiophene, dinaphthofuran, dinaphthothiophene, indolefluorene, indolocarbazolyl, indolecarbazolyl, terphenyl, tetraphenyl, imidazolyl, benzimidazolyl, pyridinyl, pyrimidinyl, piperazine, quinolinyl, isoquinolinyl, quinoxalinyl, quinazolinyl, benzoquinoxalinyl, benzoquinazolinyl, azirphenanthrene, diazirphenanthrene, carbazolyl, benzocarbazolyl, naphthocarbazolyl, dibenzocarbazolyl, or triazinyl.

8. The deuterated composition according to claim 1, characterized in that, The Ar 002 Ar 003 Ar 102 Ar 103 Ar 202 Ar 203 Each of the following is independently selected from any one or a combination of at least two of the following: phenyl, biphenyl, naphthyl, anthracene, phenanthryl, fluorenyl, triphenylene, fluoranyl, spirofluorenyl, dibenzofuranyl, dibenzothiopheneyl, naphthobenzofuran, naphthobenzothiophene, dinaphthofuran, dinaphthothiophene, indole-fluorenyl, indolocarbazoyl, indole-carbazoyl, terphenyl, tetraphenyl, imidazoyl, benzimidazolyl, pyridyl, pyrimidinyl, piperazine, quinolinyl, isoquinolinyl, quinoxalinyl, quinazolinyl, benzoquinoxalinyl, benzoquinazolinyl, azirphenyl, diazirphenyl, carbazoyl, benzocarbazoyl, naphthocarbazoyl, dibenzocarbazoyl, and triazinyl.

9. The deuterated composition according to claim 1, characterized in that, The Ar 101 Ar 201 Each is independently selected from single bonds, phenylene, biphenylene, naphthylene, anthracene, phenanthrene, fluorene, triphenylene, fluorenylene, spirofluorene, dibenzofuranyl, dibenzothiophene, naphthanobenzofuran, naphthanobenzothiophene, dinaphthanofuran, dinaphthiophene, indole-fluorene, indole-carbazoyl, indole-carbazoyl, terphenylene, tetraphenylene The group consisting of any one or at least two of the following: yl, imidazolyl, benzimidazolyl, pyridinyl, pyrimidinyl, piperazine, quinolinyl, isoquinolinyl, quinoxalinyl, quinoxalinyl, benzoquinoxalinyl, benzoquinoxalinyl, benzoquinoxalinyl, diazaphenyl, carbazolyl, benzocarbazolyl, naphthocarbazolyl, dibenzocarbazolyl, and triazine.

10. The deuterated composition according to claim 7, characterized in that, The Ar 001 The group is selected from any one of the following mono- or di-substituted groups: phenyl, diphenyl, triphenyl, naphthyl, dibenzofuranyl, dibenzothiophenyl, carbazoyl, quinoxaline, quinazoline, or triazine.

11. The deuterated composition according to claim 1, characterized in that, The Ar 101 Ar 102 Each is independently selected from one or a combination of at least two of the following: phenylene, diphenylene, terphenylene, naphthylene, dibenzofuranylene, dibenzothiophenylene, carbazoylene, quinoxaline, quinoxaline, and triazineylene.

12. The deuterated composition according to claim 1, characterized in that, The Ar 002 Ar 003 Ar 103 Ar 201 Ar 202 Ar 203 Each is independently selected from one or a combination of at least two of phenyl, diphenyl, triphenyl, naphthyl, dibenzofuranyl, dibenzothiophenyl, carbazoyl, quinoxaline, quinazoline, and triazine.

13. The deuterated composition according to claim 1, characterized in that, One of ring A and ring B is selected from naphthalene ring.

14. The deuterated composition according to claim 1, characterized in that, The C6 to C20 aryl groups are selected from any one of phenyl, naphthyl, or biphenyl.

15. The deuterated composition according to claim 1, characterized in that, Compound A is selected from any one of the following substituted or unsubstituted compounds: The substitution refers to the independent and optional replacement of each hydrogen atom in the above-mentioned compound with a deuterium atom.

16. The deuterated composition according to claim 15, characterized in that, Compound A includes the following compounds:

17. An organic electroluminescent device, characterized in that, The organic electroluminescent device includes an anode, a cathode, and an organic thin film layer disposed between the anode and the cathode; the organic thin film layer includes an electron transport layer, a light-emitting layer, a hole transport layer, and an electron blocking layer; the material of the organic thin film layer includes the deuterated composition as described in any one of claims 1-16.

18. The organic electroluminescent device according to claim 17, characterized in that, The organic thin film layer includes a light-emitting layer, and the main material of the light-emitting layer includes the deuterated composition as described in any one of claims 1-16.

19. The organic electroluminescent device according to claim 17, characterized in that, The organic electroluminescent device is a red-light organic electroluminescent device.

20. The organic electroluminescent device according to claim 19, characterized in that, The organic electroluminescent device is a red phosphorescent organic electroluminescent device.

21. A display device, characterized in that, The display device includes an organic electroluminescent device as described in any one of claims 17-20.

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