Organic electroluminescent device, display device and lighting device

Abstract

The present invention provides an organic electroluminescent device, a display device, and a lighting device. The organic electroluminescent device includes a first electrode, a second electrode, and an organic layer located between the first and second electrodes. The organic layer includes a light-emitting layer, and the light-emitting layer includes a first substance, a second substance, and a third substance. The first substance is a substance having a TTA effect, the second substance is a substance having a TADF effect, and the third substance is a fluorescent material having a multiple resonance effect. The organic electroluminescent device of the present invention can achieve a balance between efficiency and lifespan, thereby achieving high efficiency and lifespan.

Description

Technical Field

[0001] The present invention belongs to the technical field of organic light-emitting materials and relates to an organic electroluminescent device, a display device and a lighting device. Background Art

[0002] Organic light-emitting diodes (OLEDs) are the foundation of current organic light-emitting displays and lighting devices. Compared to the currently mainstream liquid crystal display (LCD), OLEDs offer advantages such as a wide color gamut, wide viewing angles, high contrast, and fast display speeds. Consequently, OLEDs are attracting increasing research and development interest from domestic companies and universities.

[0003] OLED device performance improvements are currently focused on low voltage, high efficiency, long life, and low color shift. Depending on the application scenario, device performance requirements vary, such as stability in high-temperature environments and color stability of white light. However, overall, device efficiency and lifespan are fundamental to OLED devices in various applications. Manufacturers are constantly iterating and developing new device structures with the goal of improving these two performance characteristics.

[0004] Due to the long-spin effect of organic molecules, excitons in OLED devices are divided into singlet and triplet states. Due to self-selection inhibition, triplet excitons cannot be converted into luminescence. Currently, the more mature mechanisms for utilizing triplet excitons are phosphorescence and thermally activated fluorescence. These two technologies have been successfully applied in low-energy red and green OLEDs. In high-energy blue OLEDs, both current methods are unsatisfactory. Triplet-triplet annihilation can also achieve the utilization of blue triplet excitons, but its theoretical maximum internal quantum efficiency is only 40%. Therefore, compared with improving the efficiency and lifetime of red and green light, the demand for improving the performance of blue OLEDs is more urgent and necessary. Summary of the Invention

[0005] In view of the deficiencies of the prior art, an object of the present invention is to provide an organic electroluminescent device, a display device and a lighting device.

[0006] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0007] One of the objects of the present invention is to provide an organic electroluminescent device, which includes a first electrode and a second electrode, and an organic layer located between the first electrode and the second electrode, wherein the organic layer includes a light-emitting layer, and the light-emitting layer includes a first substance, a second substance and a third substance, wherein the first substance is a substance having a TTA effect (upconversion light-emitting material), the second substance is a substance having a TADF (thermally activated delayed fluorescence) effect, and the third substance is a fluorescent light-emitting material having a multiple resonance effect.

[0008] In the present invention, by using a substance with a TTA effect as the first substance, a substance with a TADF effect as the second substance, and a fluorescent luminescent material with a multiple resonance effect as the third substance in the light-emitting layer, a balance between efficiency and life is achieved to achieve the purpose of obtaining higher efficiency and life.

[0009] A second object of the present invention is to provide a display device, comprising the organic electroluminescent device as described in the first object.

[0010] A third object of the present invention is to provide a lighting device, comprising the organic electroluminescent device as described in the first object.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The organic electroluminescent device of the present invention controls the singlet energy, triplet energy, highest occupied orbital energy level and lowest unoccupied orbital energy level among the first substance, the second substance and the third substance in the light-emitting layer, thereby controlling the energy transfer rate between molecules, adjusting the number of triplet excitons in the device, and achieving a balance between efficiency and lifespan, thereby achieving the purpose of obtaining higher efficiency and lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the structure of the organic electroluminescent device of the present invention, wherein 1 is the first electrode (anode), 2 is the hole injection layer, 3 is the hole transport layer, 4 is the electron blocking layer, 5 is the light-emitting layer, 6 is the hole blocking layer, 7 is the electron transport layer, 8 is the electron injection layer, and 9 is the second electrode (cathode). DETAILED DESCRIPTION

[0014] The technical solution of the present invention is further illustrated below through specific implementation methods.

[0015] One of the objects of the present invention is to provide an organic electroluminescent device, which includes a first electrode and a second electrode, and an organic layer located between the first electrode and the second electrode, wherein the organic layer includes a light-emitting layer, and the light-emitting layer includes a first substance, a second substance, and a third substance, wherein the first substance is a substance having a TTA effect, the second substance is a substance having a TADF effect, and the third substance is a fluorescent material having a multiple resonance effect.

[0016] In the present invention, by using a substance with a TTA effect as the first substance, a substance with a TADF effect as the second substance, and a fluorescent luminescent material with a multiple resonance effect as the third substance in the light-emitting layer, a balance between efficiency and life is achieved to achieve the purpose of obtaining higher efficiency and life.

[0017] In one embodiment, the singlet energy, triplet energy, highest occupied molecular orbital energy level and lowest unoccupied molecular orbital energy level of the first substance, the second substance and the third substance are represented as S1, T1, H1, L1, S2, T2, H2, L2, S3, T3, H3, L3, respectively, and satisfy the following relationship:

[0018] 2T1-0.2ev <S1<2T1+0.2eV,S2-T2<0.3eV,S3-T3<0.5eV,-0.2eV<T1-T2<0.2eV,S1> S2>S3, -0.2eV

[0019] In the present invention, by controlling the singlet energy, triplet energy, highest occupied orbital energy level and lowest unoccupied orbital energy level between the first substance, the second substance and the third substance, the energy transfer rate between molecules is controlled, the number of triplet excitons in the device is adjusted, and a balance between efficiency and lifespan is achieved, so as to achieve the purpose of obtaining higher efficiency and lifespan.

[0020] In one embodiment, the sum of the volume concentration of the first substance and the volume concentration of the second substance in the light-emitting layer is 90%-99% (for example, 90%, 91%, 93%, 95%, 97% or 99%), and the volume concentration of the third substance is 1-10% (for example, 1%, 3%, 5%, 7%, 9% or 10%).

[0021] In one embodiment, the volume concentration of the first substance in the light-emitting layer is 15%-80%, the volume concentration of the second substance is 15%-80%, and the volume concentration of the third substance is 2%-5%.

[0022] In the present invention, a balance between lifespan and efficiency can be achieved by regulating the ratio of materials; the three materials described above can be used to regulate the ratio of the upconversion (TTA) rate and the reverse intersystem crossing rate (RISC) to achieve adjustable efficiency and lifespan.

[0023] In one embodiment, the fluorescence half-width of the third substance in toluene solution is less than 30nm. Selecting a lower half-width is advantageous for the display device. A substance with a lower half-width as a luminescent substance in the light-emitting layer means that the luminescent spectrum of the device is narrower and the color purity is high. The narrower spectrum in the top-emitting light-emitting device can obtain a larger spectral conversion rate, and the efficiency of the top-emitting device is improved. Generally, the half-width of phosphorescent luminescent materials is generally 40-80nm. In the present invention, the third substance is preferably a luminescent material with a fluorescence half-width of less than 30nm in toluene solution.​

[0024] In one embodiment, the energy difference between the fluorescence emission peak of the first substance in a toluene solution and the ultraviolet absorption peak of the third substance in a toluene solution is less than 0.3 eV, and may be, for example, 0.25 eV, 0.2 eV, 0.16 eV, 0.1 eV, 0.05 eV, etc. It is generally believed that the environment can provide a thermal perturbation energy of up to 0.3 eV to the molecule. Therefore, when the energy deviation between the two is within 0.3 eV, the thermal perturbation of the environment can eliminate the deviation, allowing the two energies to fully overlap, thereby achieving better energy transfer.

[0025] In one embodiment, the energy difference between the fluorescence emission peak of the second substance in a toluene solution and the ultraviolet absorption peak of the third substance in a toluene solution is less than 0.3 eV, and may be, for example, 0.25 eV, 0.2 eV, 0.16 eV, 0.1 eV, 0.05 eV, etc. Similarly, if the energy difference between the ultraviolet absorption peaks of the second substance and the third substance in a toluene solution is less than 0.3 eV, the energy deviation can be eliminated by thermal perturbations in the environment, allowing the energies of the two substances to fully overlap, thereby achieving better energy transfer.

[0026] In one embodiment, the first substance is a compound having a structure shown in the following formula I:

[0027]

[0028] wherein R1, R2 and R3 are independently substituted or unsubstituted C1-C18 alkyl, substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted C5-C60 heteroaryl, substituted or unsubstituted deuterated C1-C18 alkyl, substituted or unsubstituted deuterated C6-C60 aryl or substituted or unsubstituted deuterated C5-C60 heteroaryl;

[0029] The substituents in the substituted C1-C18 alkyl, substituted C6-C60 aryl, substituted C5-C60 heteroaryl, substituted deuterated C1-C18 alkyl, substituted deuterated C6-C60 aryl or substituted deuterated C5-C60 heteroaryl are fluorine, methyl, ethyl, tert-butyl, phenyl, naphthyl, phenanthrenyl, pyrenyl, pyridyl, quinolyl, isoquinolyl, phenanthridinyl, phenanthroline, carbazolyl, indolyl, thienyl, imidazolyl, thiazolyl or pyrrolyl.

[0030] In one embodiment, the first substance is any one of the following compounds:

[0031]

[0032] Wherein Ph represents phenyl.

[0033] In one embodiment, the second substance is a compound having a structure shown in the following formula II:

[0034]

[0035] wherein T1, T2, T3, T4, T5, and T6 are independently cyano, halogen, substituted or unsubstituted C1-C18 alkyl, substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted C5-C60 heteroaryl, substituted or unsubstituted deuterated C6-C60 aryl, or substituted or unsubstituted deuterated C5-C60 heteroaryl;

[0036] The substituents in the substituted C1-C18 alkyl, substituted C6-C60 aryl, substituted C5-C60 heteroaryl, substituted deuterated alkyl, substituted deuterated C6-C60 aryl or substituted deuterated C5-C60 heteroaryl are fluorine, methyl, ethyl, tert-butyl, phenyl, naphthyl, phenanthrenyl, pyrenyl, pyridyl, quinolyl, isoquinolyl, phenanthridinyl, phenanthroline, carbazolyl, indolyl, thienyl, imidazolyl, thiazolyl or pyrrolyl.

[0037] In one embodiment, the second substance is any one of the following compounds:

[0038]

[0039] In one embodiment, the third substance is a compound having a structure shown in the following formula III:

[0040]

[0041] wherein D1, D2, D3 and D4 are independently halogen, deuterium, substituted or unsubstituted C1-C18 alkyl, substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted C5-C60 heteroaryl, substituted or unsubstituted deuterated C6-C60 aryl, or substituted or unsubstituted deuterated C5-C60 heteroaryl;

[0042] The substituents in the substituted C1-C18 alkyl, substituted C6-C60 aryl, substituted C5-C60 heteroaryl, substituted deuterated C1-C18 alkyl, substituted deuterated C6-C60 aryl or substituted deuterated C5-C60 heteroaryl are fluorine, methyl, ethyl, tert-butyl, phenyl, naphthyl, phenanthrenyl, pyrenyl, pyridyl, quinolyl, isoquinolyl, phenanthridinyl, phenanthroline, carbazolyl, indolyl, thienyl, imidazolyl, thiazolyl or pyrrolyl.

[0043] In one embodiment, the third substance is any one of the following compounds:

[0044]

[0045] Where D stands for deuterium and Ph stands for phenyl.

[0046] In one embodiment, the organic layer further comprises any one or a combination of at least two of a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer or an electron injection layer.

[0047] In the present invention, the first substance, the second substance and the third substance can be purchased or are compounds disclosed in the prior art.

[0048] A second object of the present invention is to provide a display device, comprising the organic electroluminescent device as described in the first object.

[0049] A third object of the present invention is to provide a lighting device, comprising the organic electroluminescent device described in the first object.

[0050] The materials used in the organic electroluminescent devices of the following examples and comparative examples are as follows:

[0051]

[0052]

[0053]

[0054]

[0055] The above compounds 1-1 to 3-6 in the present invention were dissolved in toluene to form a toluene solution, and the concentration was controlled at 1×10 -8 mol / L, the ultraviolet absorption peak of the compound was tested using Shimadzu UV-1750, and the fluorescence emission peak and half-peak width of the compound were tested using fluorescence spectrum testing equipment Hitachi F4600. The results are shown in Table 1 below.

[0056] Table 1

[0057]

[0058]

[0059] Example 1

[0060] This embodiment provides an organic electroluminescent device, the structure of which is as follows Figure 1As shown, it includes a first electrode 1 and a second electrode 9, and an organic layer located between the first electrode and the second electrode, wherein the organic layer includes a hole injection layer 2, a hole transport layer 3, an electron blocking layer 4, a light-emitting layer 5, a hole blocking layer 6, an electron transport layer 7, and an electron injection layer 8.

[0061] The light-emitting layer includes a first substance, a second substance and a third substance. The first substance is a substance having a TTA effect, the second substance is a substance having a TADF effect, and the third substance is a fluorescent light-emitting material having a multiple resonance effect.

[0062] The singlet energy, triplet energy, highest occupied orbital energy level and lowest unoccupied orbital energy level of the first substance, the second substance and the third substance are represented as S1, T1, H1, L1, S2, T2, H2, L2, S3, T3, H3, L3, respectively, and satisfy the following relationship:

[0063] 2T1-0.2ev <S1<2T1+0.2eV,S2-T2<0.3eV,S3-T3<0.5eV,-0.2eV<T1-T2<0.2eV,S1> S2>S3, -0.2eV

[0064] The preparation process of the organic electroluminescent device is as follows: using ITO with a film thickness of 150nm as a substrate, after using isopropyl alcohol ultrasound, using 300mw / cm 2 Irradiate with ultraviolet light of high intensity for 10 minutes. Place NPB, α-NPD, TCTA, the first substance (compound 1-1), the second substance (compound 2-1), the third substance (compound 3-1), DPEPO, Bepq2, LiF and metal aluminum into the evaporation chamber. Heat all materials, burn them at a rate of 0.1nm / S for 1 minute, and then cool them down. The hole injection layer material NPB was evaporated at a rate of 10 nm, and then The hole transport material NPD was deposited at a rate of 70 nm, and then Evaporation of electron blocking material TCTA 10nm, then Evaporation compound 1-1 and Evaporation compound 2-1 and Compound 3-1 was deposited at a rate of 30 nm in total, and then Rate evaporation hole blocking material DPEPO 5nm, Rate evaporation of electron transport material Bepq2 35nm, ​LiF material is evaporated at a rate of 1 nm to form a hole injection layer. After switching the metal mask, The aluminum cathode was evaporated at a rate of 100 nm.

[0065] Example 2

[0066] The only difference from Example 1 is that Evaporation compound 1-1 and Evaporation compound 2-1 and Compound 3-1 was evaporated at a rate of , totaling 30 nm.

[0067] Example 3

[0068] The only difference from Example 1 is that Evaporation compound 1-1 and Evaporation compound 2-1 and Compound 3-1 was evaporated at a rate of , totaling 30 nm.

[0069] Example 4

[0070] The only difference from Example 1 is that Evaporation compound 1-2 and Evaporation compound 2-2 and Compound 3-1 was evaporated at a rate of , totaling 30 nm.

[0071] Example 5

[0072] The only difference from Example 1 is that Evaporation compounds 1-3 and Evaporation compound 2-3 and Compound 3-1 was evaporated at a rate of , totaling 30 nm.

[0073] Example 6

[0074] The only difference from Example 1 is that Evaporation of compounds 1-4 and Evaporation compound 2-2 and Compound 3-2 was evaporated at a rate of , totaling 30 nm.

[0075] Example 7

[0076] The only difference from Example 1 is that Evaporation of compounds 1-4 and Evaporation compound 2-2 and Compound 3-3 was evaporated at a rate of , totaling 30 nm.

[0077] Example 8

[0078] The only difference from Example 1 is that Evaporation of compounds 1-5 and Evaporation compounds 2-4 and Compounds 3-4 were evaporated at a rate of 30 nm in total.

[0079] Example 9

[0080] The only difference from Example 1 is that Evaporation of compounds 1-5 and Evaporation compounds 2-4 and Compounds 3-4 were evaporated at a rate of 30 nm in total.

[0081] Example 10

[0082] The only difference from Example 1 is that Evaporation of compounds 1-5 and Evaporation compounds 2-4 and Compounds 3-5 were evaporated at a rate of 30 nm in total.

[0083] Example 11

[0084] The only difference from Example 1 is that Evaporation of compounds 1-6 and Evaporation compounds 2-4 and Compounds 3-5 were evaporated at a rate of 30 nm in total.

[0085] Example 12

[0086] The only difference from Example 1 is that Evaporation of compounds 1-6 and Evaporation compounds 2-5 and Compounds 3-6 were evaporated at a rate of 30 nm in total.

[0087] Example 13

[0088] The only difference from Example 1 is that Evaporation of compounds 1-7 and Evaporation compounds 2-5 and Compounds 3-6 were evaporated at a rate of 30 nm in total.

[0089] Example 14

[0090] The only difference from Example 1 is that Evaporation compounds 1-8 and Evaporation of compounds 2-6 and Compounds 3-6 were evaporated at a rate of 30 nm in total.

[0091] Example 15

[0092] The only difference from Example 1 is that Evaporation compound 1-1 and Evaporation of compounds 2-6 and Compound 3-1 was evaporated at a rate of , totaling 30 nm.

[0093] Example 16

[0094] The only difference from Example 1 is that Evaporation compound 1-1 and Evaporation of compounds 2-6 and Compound 3-1 was evaporated at a rate of , totaling 30 nm.

[0095] Example 17

[0096] The only difference from Example 1 is that Evaporation compound 1-2 and Evaporation compounds 2-5 and Compound 3-2 was evaporated at a rate of , totaling 30 nm.

[0097] Example 18

[0098] The only difference from Example 1 is that Evaporation compounds 1-3 and Evaporation compounds 2-4 and Compound 3-3 was evaporated at a rate of , totaling 30 nm.

[0099] Example 19

[0100] The only difference from Example 1 is that Evaporation of compounds 1-4 and Evaporation compound 2-3 and Compounds 3-4 were evaporated at a rate of 30 nm in total.

[0101] Example 20

[0102] The only difference from Example 1 is that Evaporation of compounds 1-5 and Evaporation compound 2-2 and Compounds 3-5 were evaporated at a rate of 30 nm in total.

[0103] Example 21

[0104] The only difference from Example 1 is that Evaporation of compounds 1-6 and Evaporation compound 2-2 and Compounds 3-5 were evaporated at a rate of 30 nm in total.

[0105] Example 22

[0106] The only difference from Example 1 is that Evaporation of compounds 1-7 and Evaporation compound 2-1 and Compounds 3-6 were evaporated at a rate of 30 nm in total.

[0107] Comparative Example 1

[0108] The only difference from Example 1 is that Evaporation compound 2-1 and Evaporation compound 2-2 and Compound 3-1 was evaporated at a rate of , totaling 30 nm.

[0109] Comparative Example 2

[0110] The only difference from Example 1 is that Evaporation compound 1-1 and Evaporation compound 1-2 and Compound 3-1 was evaporated at a rate of , totaling 30 nm.

[0111] The performance of the OLED devices prepared in the examples and comparative examples was tested. The test results are shown in Table 1 below. The following efficiency results are all at 10 mA / cm 2 The test was conducted under a current density of 25 mA / cm2 using a Keithlye 2400 current source and a CS2000 spectroradiometer. The results were calculated using software. 2 The test results are shown in Table 2.

[0112] Table 2

[0113]

[0114]

[0115] From Examples 1-3 in Table 2, it can be seen that as the TTA material composition increases, the life of the device gradually increases. Although the efficiency is not as good as that of Comparative Example 1, the efficiency is greatly improved compared to Comparative Example 2. From the examples of the present invention, it can be seen that the efficiency and external quantum efficiency of different materials with the same proportion are different, which proves that the effect of the present invention can be better achieved by improving the materials. The present invention can achieve better efficiency than the existing TTA blue light technology and better life than TADF. From the effects of Examples 1 to 22, it can be seen that the solution of the present invention can basically achieve an external quantum efficiency of more than 10% and a lifespan of more than 200 hours. Of course, individual devices may not have obvious performance improvement effects due to mismatch of materials.

[0116] In Comparative Example 1, the device with only a TADF light-emitting layer achieves optimal luminous efficiency, but the device lifespan is very short and has no practical application value. In Comparative Example 2, the device with only a TTA light-emitting layer achieves a longer device lifespan, but the device efficiency is poor and has low practical application value.

[0117] The applicant states that while the present invention uses the aforementioned embodiments to illustrate the organic electroluminescent device, display device, and lighting device of the present invention, the present invention is not limited to these embodiments. This does not imply that the present invention must rely on these embodiments for implementation. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for raw materials in the present invention's products, additions of auxiliary components, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

Claims

1. An organic electroluminescent device, characterized in that: The organic electroluminescent device includes a first electrode and a second electrode, and an organic layer located between the first electrode and the second electrode, wherein the organic layer includes a light-emitting layer, and the light-emitting layer includes a first substance, a second substance, and a third substance, wherein the first substance is a substance having a TTA effect, the second substance is a substance having a TADF effect, and the third substance is a fluorescent luminescent material having a multiple resonance effect; The singlet energy, triplet energy, highest occupied orbital energy level and lowest unoccupied orbital energy level of the first substance, the second substance and the third substance are represented as S1, T1, H1, L1, S2, T2, H2, L2, S3, T3, H3, L3, respectively, and satisfy the following relationship: 2T1-0.2ev <S1<2T1+0.2eV,S2-T2<0.3eV,S3-T3<0.5eV,-0.2eV<T1-T2<0.2eV,S1> S2>S3, -0.2eV <H1-H3<0.2eV,-0.2eV<H2-H3<0.2eV,-0.2eV<L1-L3<0.2eV,-0.2eV<L2-L3<0.2eV; The third substance is a compound having a structure shown in the following formula III: wherein D1, D2, D3 and D4 are independently deuterium, substituted or unsubstituted C1-C18 alkyl, unsubstituted C6-C60 aryl or unsubstituted deuterated C6-C60 aryl; The substituent in the substituted C1-C18 alkyl group is methyl, ethyl or tert-butyl.

2. The organic electroluminescent device according to claim 1, wherein In the light-emitting layer, the sum of the volume concentration of the first substance and the volume concentration of the second substance accounts for 90%-99%, and the volume concentration of the third substance accounts for 1-10%.

3. The organic electroluminescent device according to claim 2, characterized in that: The volume concentration of the first substance in the light-emitting layer is 15%-80%, the volume concentration of the second substance is 15%-80%, and the volume concentration of the third substance is 2%-5%.

4. The organic electroluminescent device according to claim 1, wherein The fluorescence half-peak width of the third substance in a toluene solution is less than 30 nm.

5. The organic electroluminescent device according to claim 1, wherein An energy difference between a fluorescence emission peak of the first substance in a toluene solution and an ultraviolet absorption peak of the third substance in a toluene solution is less than 0.3 eV.

6. The organic electroluminescent device according to claim 1, characterized in that The energy difference between the fluorescence emission peak of the second substance in the toluene solution and the ultraviolet absorption peak of the third substance in the toluene solution is less than 0.3 eV.

7. The organic electroluminescent device according to claim 1, wherein The first substance is a compound having a structure shown in the following formula I: wherein R1, R2 and R3 are independently substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted deuterated C6-C60 aryl; The substituent in the substituted C6-C60 aryl group and the substituted deuterated C6-C60 aryl group is phenyl, naphthyl, quinolyl or isoquinolyl.

8. The organic electroluminescent device according to claim 7, characterized in that: The first substance is any one of the following compounds: Wherein Ph represents phenyl.

9. The organic electroluminescent device according to claim 1, characterized in that: The second substance is a compound having a structure shown in the following formula II: wherein T1, T2, T3, T4, T5 and T6 are independently cyano, halogen, unsubstituted C5-C60 heteroaryl or unsubstituted deuterated C5-C60 heteroaryl.

10. The organic electroluminescent device according to claim 9, characterized in that: The second substance is any one of the following compounds:

11. The organic electroluminescent device according to claim 1, wherein The third substance is any one of the following compounds: Where D stands for deuterium and Ph stands for phenyl.

12. The organic electroluminescent device according to claim 1, wherein The organic layer further includes any one or a combination of at least two of a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer or an electron injection layer.

13. A display or lighting device, characterized in that: The display or lighting device comprises the organic electroluminescent device according to any one of claims 1 to 12.

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