KR20190007892A - Novel compound and organic electroluminescent divice including the same - Google Patents

Abstract

The present invention relates to a novel compound to which two phenyldimethylfluorene and arylamine is directly coupled and an organic electroluminescent device including the same, which forms a HOMO level which can easily inject and transport a positive hole for low voltage to be possible. Moreover, through phenyl substitution of dimethylfluorene, a thin film of molecules and interface arrangement are improved, and a roll off phenomenon is restricted through quick hole mobility. Through the phenyl substitution, thermal stability that is weakness of the dimethylfluorene is supplemented to realize a long-lived device. In addition, driving stability can be realized by preventing recrystallization of a thin film by maintaining high Tg in a relatively low molecule.

Description

TECHNICAL FIELD [0001] The present invention relates to a novel compound, and an organic light emitting device including the same. BACKGROUND OF THE INVENTION [0002]

The present invention relates to a novel compound having two phenyldimethylfluorenes and an arylamine bonded to each other, and an organic light emitting device comprising the same.

A material used as an organic material layer in an organic electroluminescent device (OLED) can be largely classified into a light emitting material, a hole injecting material, a hole transporting material, an electron transporting material, and an electron injecting material depending on functions. The light emitting material may be classified into a polymer and a low molecular weight depending on the molecular weight, and may be classified into a fluorescent material derived from singlet excited state of electrons and a phosphorescent material derived from an electron triplet excited state according to a light emitting mechanism, The light emitting material can be classified into blue, green and red light emitting materials and yellow and orange light emitting materials necessary for realizing better natural color depending on the luminescent color. Further, in order to increase the color purity and to increase the luminous efficiency through energy transfer, a host / dopant system can be used as a luminescent material. The principle is that when a small amount of dopant having a smaller energy band gap and a higher luminous efficiency than a host mainly constituting the light emitting layer is mixed with the light emitting layer in a small amount, the excitons generated in the host are transported to the dopant to emit light with high efficiency. At this time, since the wavelength of the host is shifted to the wavelength of the dopant, the light of the desired wavelength can be obtained according to the type of the dopant and the host.

Various compounds have been known as materials for use in such organic light emitting devices. However, in the case of organic light emitting devices using known materials, development of new materials is continuously required due to high driving voltage, low efficiency, and short lifetime. Accordingly, efforts have been made to develop an organic light emitting device having low voltage driving, high luminance, and long life using a material having excellent characteristics.

Korean Patent Publication No. 10-2015-0086721

In order to solve the above problems, the present invention provides a novel organic compound having two phenyldimethylfluorenes and an arylamine bonded thereto, and an organic light emitting device comprising the same.

However, the problems to be solved by the present invention are not limited to the problems described above, and other problems not described can be clearly understood by those skilled in the art from the following description.

A first aspect of the present invention provides a compound represented by formula 1:

[Chemical Formula 1]

In Formula 1,

Ar ₁ is a C ₁₀ -C ₂₄ aryl group which may be substituted or a C ₅ -C ₂₅ heteroaryl group which may be substituted.

A second aspect of the present invention provides an organic light emitting device comprising an organic compound layer containing a compound according to the present invention between a first electrode and a second electrode.

The compound of the present invention enables a low voltage by forming a HOMO level which facilitates hole injection and hole transport through direct bonding of phenyldimethylfluorene substituted with phenyl to dimethylfluorene and arylamine. In addition, the substitution of dimethylfluorene for phenyl improves the thin film and interfacial arrangement of molecules, and it is possible to inhibit roll-off phenomenon through hole mobility. At the same time, the thermal stability, which is a disadvantage of dimethylfluorene, can be complemented by phenyl substitution, and a long-life device can be realized. In addition, it is possible to prevent the recrystallization of the thin film due to the maintenance of a high Tg at a relatively low molecular weight, thereby realizing driving stability.

1 is a schematic view of an organic light emitting device according to an embodiment of the present invention.

Hereinafter, embodiments and examples of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains.

It should be understood, however, that the present invention may be embodied in many different forms and is not limited to the embodiments and examples described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout this specification, when a member is "on " another member, it includes not only when the member is in contact with the other member, but also when there is another member between the two members.

Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. The terms "about "," substantially ", etc. used to the extent that they are used throughout the specification are intended to be taken to mean the approximation of the manufacturing and material tolerances inherent in the stated sense, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure. The word " step (or step) "or" step "used to the extent that it is used throughout the specification does not mean" step for.

Throughout this specification, the term "combination thereof" included in the expression of the machine form means one or more combinations or combinations selected from the group consisting of the constituents described in the expression of the machine form, And the like.

Throughout this specification, the description of "A and / or B" means "A or B, or A and B".

Throughout the specification, the term "aryl" refers to a C _5-25 aromatic hydrocarbon ring group such as phenyl, benzyl, naphthyl, biphenyl, terphenyl, fluorene, phenanthrenyl, triphenylenyl, Means an aromatic ring such as phenyl, naphthyl, neopentyl, neopentyl, neopentyl, neopentyl, neopentyl, neopentyl, neopentyl, neopentyl, neopentyl, neopentyl, Examples of the C _5-25 aromatic ring containing a hetero element include pyrrolyl, pyrazinyl, pyridinyl, indolyl, isoindolyl, furyl, benzofuranyl, isobenzofuranyl, dibenzofuranyl, Benzothiophenyl, dibenzothiophenyl, quinolyl, isoquinolyl, quinoxalinyl, carbazolyl, phenanthridinyl, acridinyl, phenanthrolinyl, thienyl, and pyridine rings, pyrazine rings, pyrimidine rings , Pyridazine ring, triazine ring, indole ring, quinoline ring , Acridine rings, pyrrolidine rings, dioxane rings, piperidine rings, morpholine rings, piperazine rings, carbazole rings, furan rings, thiophene rings, oxazole rings, oxadiazole rings, May include a heterocyclic group formed from a heterocyclic ring, a thiazole ring, a thiadiazole ring, a thiadiazole ring, a benzothiazole ring, a triazole ring, an imidazole ring, a benzimidazole ring, a pyran ring or a dibenzofuran ring .

"Optionally substituted" term throughout the present specification is a deuterium, a halogen, an amino group, a nitrile group, a nitro group or a C ₁ ~ C ₂₀ alkyl group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ of the alkoxy group, Means a group selected from the group consisting of a C ₃ to C ₂₀ cycloalkyl group, a C ₃ to C ₂₀ heterocycloalkyl group, a C ₆ to C ₃₀ aryl group, and a C ₃ to C ₃₀ heteroaryl group can do. In addition, throughout the present specification, the same symbols may have the same meanings unless otherwise specified.

A first aspect of the invention provides a compound represented by formula 1:

[Chemical Formula 1]

In Formula 1,

Ar ₁ is a C ₁₀ -C ₂₄ aryl group which may be substituted or a C ₅ -C ₂₅ heteroaryl group which may be substituted.

In one embodiment of the present invention, Ar ₁ may be selected from a combination of naphthyl, diphenyl, triphenyl, tetraphenyl, carbazole, combinations thereof, and a combination thereof, which may be substituted, Do not. Ar ₁ may be a phenyl group linked to naphthyl, diphenyl, triphenyl, tetraphenyl, or carbazole.

In one embodiment of the present invention, the phenyl group of the compound of Formula 1 may be bonded to any one of 1, 2, 3 and 4 positions of fluorene. In one embodiment of the present invention, the phenyl group may be bonded to the fluorene at the 2-position, and specifically may be represented by the following formula (1-1). Fluorene may have the most stable form when the phenyl group is substituted at the 2-position due to the high electron density distribution at the 2-position structure.

[Formula 1-1]

In Formula 1-1,

Ar ₁ is as defined in the above formula (1).

In one embodiment of the invention, the compound may comprise a compound of formula 2:

(2)

In Formula 2,

n ₁ is an integer of 1 to 3, and n ₂ and n ₃ are each independently an integer of 0 or 1.

In one embodiment of the invention, the compound may comprise a compound of formula 3:

(3)

In Formula 3,

L ₁ is a direct bond or phenylene.

In one embodiment of the invention, the compound may comprise a compound of formula 4 or 5:

[Chemical Formula 4]

[Chemical Formula 5]

In the above formulas,

L ₁ is a direct bond or phenylene.

In one embodiment of the present invention, L < _{1 >} may include, for example, any of the following structures:

In the above structures, * represents a bonding position.

As described above, L < ₁ > may be phenylene substituted at various positions, and may have various HOMO energy levels depending on the substitution position of phenylene. When L ₁ is connected to naphthyl or carbazole in the para form of phenylene, the lifetime of the device can be improved.

In one embodiment of the present invention, the compound represented by Formula 1 may be synthesized by the following process, but not limited thereto:

[Reaction Scheme]

In one embodiment of the present invention, the compounds represented by Chemical Formulas 1 to 5 may include, but are not limited to, the following compounds:

For example, the compounds represented by any one of formulas (1) to (5) may include the following compounds. The following compounds have an appropriate HOMO level suitable for the hole transport layer and have high hole mobility and high efficiency.

In addition, the compounds represented by any one of formulas (1) to (5) may include, for example, the following compounds. The following compounds have an appropriate HOMO level suitable for the second hole transporting layer, and when applied to a device together with the first hole transporting layer, a device with a low driving voltage, high efficiency, and long life is possible.

The second aspect of the present invention provides an organic light emitting device comprising a compound represented by any one of Chemical Formulas 1 to 5 above. The organic light emitting device may include at least one organic compound layer containing a compound according to the present invention between the first electrode and the second electrode.

In one embodiment of the present invention, the organic layer may be a hole injection layer, a hole transport layer, or a light emission assist layer, and may be, but not limited to, a hole transport layer. The compounds of the present invention may be used alone or in combination with known compounds when forming an organic layer.

In one embodiment of the present invention, the organic light emitting device may include, but not limited to, an organic material layer containing a hole transporting material and an organic material layer containing a compound represented by the above formulas 1 to 5.

In one embodiment of the present invention, the organic light emitting device may include an organic material layer containing a compound represented by Chemical Formulas 1 to 5 as a first hole transport layer and a second hole transport layer.

The organic light emitting device includes an organic layer such as a hole injection layer (HIL), a hole transport layer (HTL), a light emitting layer (EML), an electron transport layer (ETL), and an electron injection layer (EIL) between an anode and a cathode One or more layers may be included.

For example, the organic light emitting device can be fabricated as shown in FIG. The organic light emitting device includes an anode (hole injection electrode 1000), a hole injection layer 200, a hole transport layer 300, a light emitting layer 400, an electron transport layer 500, an electron injection layer 600, Implantation electrode 2000) may be stacked in this order.

1, the substrate 100 may be a transparent glass substrate or a flexible plastic substrate having excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and waterproofness. have.

The hole injection electrode 1000 is used as an anode for hole injection of the organic light emitting element. A material having a low work function may be used to inject holes and may be formed of a transparent material such as indium tin oxide (ITO), indium zinc oxide (IZO), or graphene.

The hole injection layer 200 may be formed on the anode by depositing a hole injection layer material by a method such as vacuum deposition, spin coating, casting, or Langmuir-Blodgett (LB). When the hole injection layer is formed by the vacuum deposition method, the deposition conditions vary depending on the compound used as the material of the hole injection layer 200, the structure and thermal characteristics of the desired hole injection layer, and the like. A deposition temperature, a degree of vacuum of 10 ^-8 to 10 ^-3 torr, a deposition rate of 0.01 to 100 Å / sec, and a layer thickness range of 10 Å to 5 μm.

Next, a hole transporting layer material may be deposited on the hole injection layer 200 by a method such as vacuum deposition, spin coating, casting, or Langmuir-Blodgett (LB) to form the hole transporting layer 300. When the hole transporting layer is formed by the vacuum deposition method, the deposition conditions vary depending on the compound used, but it is generally preferable to select the conditions within the substantially same range as the formation of the hole injection layer.

The hole transport layer 300 may be made of the compound according to the present invention. As described above, the compound according to the present invention may be used alone or a known compound may be used together. In addition, according to one embodiment of the present invention, the hole transport layer 300 may have one or more layers, and may include a hole transport layer formed only of a known material. In addition, according to an embodiment of the present invention, a light emitting auxiliary layer may be formed on the hole transport layer 300. In the present invention, the light-emission-assisting layer means a layer formed between the hole-transporting layer and the light-emitting layer, and may also be referred to as a second hole-transporting layer or a third hole-transporting layer.

The light emitting layer material may be deposited on the hole transport layer 300 or the light emitting auxiliary layer by a method such as vacuum deposition, spin coating, casting, or LB method. When the light emitting layer is formed by the vacuum vapor deposition method, the deposition conditions vary depending on the compound used, but it is generally preferable to select the conditions within the substantially same range as the formation of the hole injection layer. The light emitting layer material may be a known compound as a host or a dopant.

When the phosphorescent dopant is used together with the phosphorescent dopant, a hole blocking material (HBL) may be further deposited by vacuum evaporation or spin coating to prevent triplet excitons or holes from diffusing into the electron transport layer. The hole blocking material that can be used at this time is not particularly limited, but any known hole blocking material may be used. For example, an oxadiazole derivative, a triazole derivative, a phenanthroline derivative, or a hole blocking material described in Japanese Patent Laid-Open Publication No. 11-329734 (A1) can be exemplified. Typically, Balq (bis Phenanthrolines based compounds such as UDC company BCP (bassocouroin), and the like can be used.

An electron transport layer 500 is formed on the light emitting layer 400 formed as described above. The electron transport layer may be formed by vacuum deposition, spin coating, casting, or the like. The deposition conditions of the electron transporting layer depend on the compound used, but it is generally preferable to select the conditions within the same range as the formation of the hole injection layer.

Then, an electron injection layer material may be deposited on the electron transport layer 500 to form an electron injection layer 600. The electron injection layer may be formed by vacuum deposition, spin coating, casting, And the like.

The hole injecting layer 200, the hole transporting layer 300, the light emitting layer 400 and the electron transporting layer 500 of the organic light emitting diode can be formed using the compound according to the present invention or the following materials. The compound and a known substance can be used together.

A cathode 2000 for electron injection is formed on the electron injection layer 600 by a vacuum evaporation method or a sputtering method. As the cathode, various metals may be used. Specific examples thereof include aluminum, gold, and silver.

The organic light emitting device of the present invention can have an organic light emitting device having various structures as well as an anode, a hole injecting layer, a hole transporting layer, a light emitting layer, an electron transporting layer, an electron injecting layer and a cathode structure, Layer or an intermediate layer of two layers may be further formed.

As described above, the thickness of each organic material layer formed in accordance with the present invention can be controlled according to the required degree, specifically 5 to 1,000 nm, more specifically 5 to 150 nm.

In addition, since the organic material layer containing the compound represented by the formula (1) can control the thickness of the organic material layer in the molecular unit, the present invention has advantages of uniform surface and excellent shape stability.

The organic light emitting compound according to the present invention may be applied to all of the first and second aspects of the present invention, but the present invention is not limited thereto.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited by these Examples.

[Example]

Production Example 1

Preparation of IM1 for the synthesis of the desired compound was synthesized by the following steps:

Synthesis of IM1-1

15.0 g of 2-bromo-9,9-dimethyl-9H-fluorene and 7.4 g of phenylboronic acid were dissolved in 200 ml of 1,4-dioxane, and 80 ml of K ₂ CO ₃ (2M) and Pd PPh ₃ ) _{4 (} 1.9 g), and the mixture was stirred under reflux. After confirming the reaction by TLC, water was added and the reaction was terminated. The organic layer was extracted with MC, filtered under reduced pressure and purified by column to obtain 10.69 g (yield: 72%) of intermediate IM1-1.

Synthesis of IM1

10.0 g of the above IM1-1 was dissolved in 100 ml of 60 ^° C DMF in a round bottom flask and then a solution prepared by dissolving 6.6 g of NBS in 50 ml of DMF was slowly added dropwise and stirred for 2 hours. After confirming the reaction by TLC, water was added and the reaction was terminated. Filtered under reduced pressure, and recrystallized to obtain IM1 (8.7 g, yield 67%).

The starting materials IM2 to IM4 were synthesized in the same manner as IM1.

Production Example 2

Synthesis and Preparation of OP

The OP materials used for the synthesis of the target compounds are as follows.

Synthesis of Compound 1

20.0 g of IM1, 12 g of OP1, 10 g of t-BuONa, 1 g of Pd ₂ (dba) _{3 and} 1.2 ml of (t-Bu) ₃ P were dissolved in 200 ml of toluene, and the mixture was stirred under reflux. After confirming the reaction by TLC, water was added and the reaction was terminated. The organic layer was extracted with MC, filtered under reduced pressure, and then subjected to column purification and recrystallization to obtain 15.02 g (yield 74%) of Compound 1.

m / z: 705.34 (100.0%), 706.34 (58.8%), 707.35 (17.0%), 708.35

Synthesis of Compound 2

Compound 2 was synthesized in the same manner as Compound 1 using IM2 instead of IM1 (yield: 62%).

m / z: 705.34 (100.0%), 706.34 (58.8%), 707.35 (17.0%), 708.35

Synthesis of Compound 3

Compound 3 was synthesized in the same manner as Compound 1 using IM3 instead of IM1 (yield 65%).

m / z: 705.34 (100.0%), 706.34 (58.8%), 707.35 (17.0%), 708.35

Synthesis of Compound 4

Compound 4 was synthesized by using IM4 in place of IMl in the same manner as Compound 1. (Yield: 57%).

m / z: 705.34 (100.0%), 706.34 (58.8%), 707.35 (17.0%), 708.35

Synthesis of Compound 5

Compound 5 was synthesized by using OP2 instead of OP1 in the same manner as Compound 1 (yield: 74%).

m / z: 755.36 (100.0%), 756.36 (63.2%), 757.36 (19.9%), 758.37 (4.0%

Synthesis of Compound 6

Compound 6 was synthesized in the same manner as Compound 1 using OP3 instead of OP1 (yield: 72%).

m / z: 755.36 (100.0%), 756.36 (63.2%), 757.36 (19.9%), 758.37 (4.0%

Synthesis of Compound 7

Compound 7 was synthesized in the same manner as Compound 1 using OP4 instead of OP1 (yield: 75%).

m / z: 794.37 (100.0%), 795.37 (65.4%), 796.37 (21.2%), 797.38

Synthesis of Compound 8

Compound 8 was synthesized in the same manner as Compound 1 using IM2 instead of IM1 and OP4 instead of OP1 (Yield: 70%).

m / z: 794.37 (100.0%), 795.37 (65.4%), 796.37 (21.2%), 797.38

Synthesis of Compound 9

Compound 9 was synthesized in the same manner as Compound 1 using IM3 instead of IM1 and OP4 in place of OP1 (yield: 58%).

m / z: 794.37 (100.0%), 795.37 (65.4%), 796.37 (21.2%), 797.38

Synthesis of Compound 10

Compound 10 was synthesized in the same manner as Compound 1 using IM4 instead of IM1 and OP4 instead of OP1 (yield: 58%).

m / z: 794.37 (100.0%), 795.37 (65.4%), 796.37 (21.2%), 797.38

Example 1: Preparation of organic light emitting device

A glass substrate coated with a thin film of indium tin oxide (ITO) having a thickness of 1500 Å was ultrasonically cleaned using distilled water. After the distilled water was washed, the substrate was ultrasonically washed with a solvent such as isopropyl alcohol, acetone, or methanol, dried, and transferred to a plasma cleaner. Then, the substrate was cleaned using oxygen plasma for 5 minutes. Thereafter, a hole injection layer HI01 of 600 angstroms, HATCN of 50 angstroms and a hole transport layer of compound 1 600 angstroms were formed on the ITO substrate by using a thermal evaporator, and then doped with BH01: BD01 3% as the light emitting layer 250 Å. Next, ET01: Liq (1: 1) 300 Å was formed as an electron transport layer, LiF 10 Å and aluminum (Al) 1000 Å were prepared, and the device was encapsulated in a glove box to prepare an organic light emitting device.

Examples 2 to 6: Preparation of organic light emitting device

An organic light emitting device in which a hole transporting layer was formed by using the same method as Example 1, but using the compounds 2 to 6 instead of the compound 1 was prepared.

Examples 7 to 10: Preparation of organic light emitting device

In the same manner as in Example 1, Compound 1 was used as a hole transporting layer at 500 angstroms, and compounds 7 to 10 were used as a second hole transporting layer at 100 angstroms to prepare an organic light emitting device.

Comparative Examples 1 to 8

An organic light emitting device was prepared by using the same method as in Example 1 except that the following Ref.1 to Ref.8 were used in place of Compound 1, respectively.

Comparative Examples 9 to 10

In the same manner as in Example 1, Compound 1 was used as a hole transporting layer at 500 angstroms, and Refs 9 to Ref.10 was used as a second hole transporting layer at 100 angstroms to prepare an organic light emitting device.

Experimental Example  1: Performance evaluation of organic light emitting device

A voltage was applied to the Keithley 2400 source measurement unit to inject electrons and holes and the luminance was measured using a Konica Minolta spectroscope (CS-2000). , The performance of the organic light emitting device of Examples and Comparative Examples was evaluated by measuring the current density and the luminance with respect to the applied voltage under the atmospheric pressure condition, and the results are shown in Table 3.

As shown in Table 1, it can be seen that the embodiments of the present invention have increased efficiency and lifetime and lower driving voltage as compared with Comparative Examples 1 to 10. Examples 1, 2, 3 and 4 and Comparative Examples 1 and 2, in which 1) a diphenylmote is directly bonded to an amine and a phenyl is directly bonded to the amine, , 3), 2) a case where two dimethylfluorenes are substituted with phenyl, and a case where phenylfluorene is attached on one side and phenyl is substituted on only one side of fluorene, , 4 and Comparative Examples 4, 5, 6 and 7 are compared; 3) when an amine is bonded to a phenyl substituted naphthyl or naphthyl group with two dimethylfluorenes and phenyl, and when the amine is bonded to three dimethyl 4) When applied to the device as the second hole transporting layer together with the first embodiment, it was found that when carbazole is contained in the device and the carbazole is contained but the carbon number is too large, Examples 7, 8, 9 and 10 and Comparative Examples 9 and 10, in which the sol is bonded to carbon, When T, and confirmed that the change in device efficiency and lifetime of the device embodiment of the present invention. It can be seen that the compound of the present invention in which phenyl is substituted for the 2-position dimethylfluorene has a low driving voltage, and the efficiency and lifetime are greatly improved. Particularly, when the compound of the present invention is used as the first hole transporting layer and the second hole transporting layer as in Examples 7 to 10, it can be seen that the driving voltage is lower and the efficiency and lifetime are improved as compared with the case of using one hole transporting layer Do.

It will be understood by those of ordinary skill in the art that the foregoing description of the embodiments is for illustrative purposes and that those skilled in the art can easily modify the invention without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be interpreted as being included in the scope of the present invention .

100: substrate
200: Hole injection layer
300: hole transport layer
400: light emitting layer
500: electron transport layer
600: electron injection layer
1000: anode
2000: cathode

Claims (14)

A compound represented by the following formula (1):
[Chemical Formula 1]

In Formula 1,
Ar ₁ is a C ₁₀ -C ₂₄ aryl group which may be substituted or a C ₅ -C ₂₅ heteroaryl group which may be substituted. The method according to claim 1,
Wherein Ar ₁ is selected from naphthyl, diphenyl, triphenyl, tetraphenyl, carbazole, combinations thereof, and phenyl and combinations thereof, which may be substituted. The method according to claim 1,
Wherein said compound comprises a compound represented by the following formula (1-1):
[Formula 1-1]

In Formula 1-1,
Ar &_lt; 1 _> is as defined in claim ₁ ; The method according to claim 1,
Wherein said compound comprises a compound represented by Formula 2:
(2)

In Formula 2,
n ₁ is an integer of 1 to 3,
n ₂ and n ₃ are each independently 0 or an integer of 1; The method according to claim 1,
Wherein said compound comprises a compound represented by Formula 3:
(3)

In Formula 3,
L ₁ is a direct bond or phenyl. The method according to claim 1,
Wherein said compound comprises a compound represented by the following formula (4) or (5):
[Chemical Formula 4]

[Chemical Formula 5]

In Formula 4 or Formula 5,
L ₁ is a direct bond or phenyl. The method according to claim 5 or 6,
L < _{1 >} is any one of the following structures:

In the above structures,
* Is the binding position. 5. The method of claim 4,
Wherein the compound represented by Formula 2 is any one of the following compounds:

6. The method of claim 5,
Wherein the compound represented by Formula 3 is any one of the following compounds:

The method according to claim 6,
The compound represented by Formula 4 or Formula 5 is any one of the following compounds:

And an organic material layer containing the compound of claim 1 between the first electrode and the second electrode. 12. The method of claim 11,
Wherein the organic material layer is one or more layers of a hole injecting layer, a hole transporting layer, and a light emitting auxiliary layer. 13. The method of claim 12,
Wherein the organic material layer is a hole transporting layer. 13. The method of claim 12,
Wherein the organic material layer is a light emission-assisting layer.

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