KR20210090333A - Novel compound and organic light emitting device comprising the same - Google Patents

Abstract

The present invention provides a novel compound and an organic light emitting device comprising the same. The compound is represented by a chemical formula 1, and can be used as a material for an organic layer of an organic light emitting device, and can also be used in a solution process.

Description

Novel compound and organic light emitting device comprising the same

The present invention relates to a novel compound and an organic light emitting device comprising the same.

In general, the organic light emitting phenomenon refers to a phenomenon in which electric energy is converted into light energy using an organic material. The organic light emitting device using the organic light emitting phenomenon has a wide viewing angle, excellent contrast, fast response time, and excellent luminance, driving voltage, and response speed characteristics, and thus many studies are being conducted.

An organic light emitting device generally has a structure including an anode and a cathode and an organic material layer between the anode and the cathode. The organic material layer is often made of a multi-layered structure composed of different materials in order to increase the efficiency and stability of the organic light emitting device, and for example, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like. In the structure of the organic light emitting device, when a voltage is applied between the two electrodes, holes are injected into the organic material layer from the anode and electrons from the cathode are injected into the organic material layer. When the injected holes and electrons meet, excitons are formed, and the excitons When it falls back to the ground state, it lights up.

The development of new materials for organic materials used in organic light emitting devices as described above is continuously required.

Meanwhile, in order to reduce process costs, an organic light emitting diode using a solution process, particularly an inkjet process, has been developed instead of a conventional deposition process. In the early days, it was attempted to develop an organic light emitting device by coating all organic light emitting device layers with a solution process, but current technology has limitations. A hybrid process using

Accordingly, the present invention provides a novel material for an organic light emitting device that can be used in an organic light emitting device and can be used in a solution process at the same time.

Korean Patent Publication No. 10-2000-0051826

The present invention relates to a novel organic light emitting material and an organic light emitting device comprising the same.

The present invention provides a compound represented by the following formula (1):

[Formula 1]

In Formula 1,

Ar ₁ and Ar ₂ are each independently, substituted or unsubstituted C _6-60 aryl; _{Or substituted or unsubstituted C 2-60} heteroaryl comprising any one or more selected from the group consisting of N, O and S,

L ₁ is a single bond, substituted or unsubstituted C _6-60 arylene, -NRa-, -(substituted or unsubstituted C _6-60 arylene)-NRa-, -O-, or -(substituted or unsubstituted cyclic C _6-60 arylene)-O-,

Ra is substituted or unsubstituted C _6-60 aryl; _{Or substituted or unsubstituted C 2-60} heteroaryl comprising any one or more selected from the group consisting of N, O and S,

n is 2 and R is O; n is 3 and R is N; or n is 2 or 3, and R is an n-valent substituted or unsubstituted C _6-60 aromatic ring.

In addition, the present invention is a first electrode; a second electrode provided to face the first electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one of the organic material layers includes the compound represented by Formula 1 above. .

The compound represented by Chemical Formula 1 described above can be used as a material for an organic material layer of an organic light emitting device, and can also be used in a solution process, and can improve efficiency, low driving voltage and/or lifespan characteristics in an organic light emitting device. have. In particular, the compound represented by Chemical Formula 1 described above may be used as a hole injection, hole transport, light emitting and electron transport material.

FIG. 1 shows an example of an organic light emitting device including a substrate 1 , an anode 2 , a light emitting layer 3 , and a cathode 4 .
2 shows a substrate 1, an anode 2, a hole injection layer 5, a hole transport layer 6, a light emitting layer 3, an electron transport layer 7, an electron injection layer 8 and a cathode 4 An example of an organic light emitting device is shown.

Hereinafter, it will be described in more detail to help the understanding of the present invention.

The present invention provides a compound represented by the above formula (1).

또는

는 다른 치환기에 연결되는 결합을 의미한다. In this specification,

or

means a bond connected to another substituent.

As used herein, the term "substituted or unsubstituted" refers to deuterium; halogen group; nitrile group; nitro group; hydroxyl group; carbonyl group; ester group; imid; amino group; phosphine oxide group; alkoxy group; aryloxy group; alkyl thiooxy group; arylthioxy group; an alkyl sulfoxy group; arylsulfoxy group; silyl group; boron group; an alkyl group; cycloalkyl group; alkenyl group; aryl group; aralkyl group; aralkenyl group; an alkylaryl group; an alkylamine group; an aralkylamine group; heteroarylamine group; arylamine group; an aryl phosphine group; or N, O, and S atom means that it is substituted or unsubstituted with one or more substituents selected from the group consisting of a heterocyclic group containing one or more atoms, or substituted or unsubstituted with two or more of the above-exemplified substituents connected . For example, "a substituent in which two or more substituents are connected" may be a biphenyl group. That is, the biphenyl group may be an aryl group, and may be interpreted as a substituent in which two phenyl groups are connected.

In the present specification, the number of carbon atoms in the carbonyl group is not particularly limited, but preferably 1 to 40 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.

In the present specification, in the ester group, the oxygen of the ester group may be substituted with a linear, branched or cyclic alkyl group having 1 to 25 carbon atoms or an aryl group having 6 to 25 carbon atoms. Specifically, it may be a compound of the following structural formula, but is not limited thereto.

In the present specification, the number of carbon atoms of the imide group is not particularly limited, but it is preferably from 1 to 25 carbon atoms. Specifically, it may be a compound having the following structure, but is not limited thereto.

In the present specification, the silyl group specifically includes a trimethylsilyl group, a triethylsilyl group, a t-butyldimethylsilyl group, a vinyldimethylsilyl group, a propyldimethylsilyl group, a triphenylsilyl group, a diphenylsilyl group, a phenylsilyl group, and the like. However, the present invention is not limited thereto.

In the present specification, the boron group specifically includes, but is not limited to, a trimethylboron group, a triethylboron group, a t-butyldimethylboron group, a triphenylboron group, a phenylboron group, and the like.

In the present specification, examples of the halogen group include fluorine, chlorine, bromine or iodine.

In the present specification, the alkyl group may be linear or branched, and the number of carbon atoms is not particularly limited, but is preferably 1 to 40. According to an exemplary embodiment, the number of carbon atoms in the alkyl group is 1 to 20. According to another exemplary embodiment, the alkyl group has 1 to 10 carbon atoms. According to another exemplary embodiment, the alkyl group has 1 to 6 carbon atoms. Specific examples of the alkyl group include methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1-ethyl-butyl, pentyl, n -pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl , n-heptyl, 1-methylhexyl, cyclopentylmethyl, cyclohexylmethyl, octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2 -Dimethylheptyl, 1-ethyl-propyl, 1,1-dimethyl-propyl, isohexyl, 2-methylpentyl, 4-methylhexyl, 5-methylhexyl and the like, but are not limited thereto.

In the present specification, the alkenyl group may be linear or branched, and the number of carbon atoms is not particularly limited, but is preferably 2 to 40. According to an exemplary embodiment, the carbon number of the alkenyl group is 2 to 20. According to another exemplary embodiment, the carbon number of the alkenyl group is 2 to 10. According to another exemplary embodiment, the alkenyl group has 2 to 6 carbon atoms. Specific examples include vinyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 3-methyl-1- Butenyl, 1,3-butadienyl, allyl, 1-phenylvinyl-1-yl, 2-phenylvinyl-1-yl, 2,2-diphenylvinyl-1-yl, 2-phenyl-2-( Naphthyl-1-yl)vinyl-1-yl, 2,2-bis(diphenyl-1-yl)vinyl-1-yl, stilbenyl group, styrenyl group, and the like, but are not limited thereto.

In the present specification, the cycloalkyl group is not particularly limited, but preferably has 3 to 60 carbon atoms, and according to an exemplary embodiment, the cycloalkyl group has 3 to 30 carbon atoms. According to another exemplary embodiment, the carbon number of the cycloalkyl group is 3 to 20. According to another exemplary embodiment, the cycloalkyl group has 3 to 6 carbon atoms. Specifically, cyclopropyl, cyclobutyl, cyclopentyl, 3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl, 3, 4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl, cyclooctyl, and the like, but is not limited thereto.

In the present specification, the aryl group is not particularly limited, but preferably has 6 to 60 carbon atoms, and may be a monocyclic aryl group or a polycyclic aryl group. According to an exemplary embodiment, the carbon number of the aryl group is 6 to 30. According to an exemplary embodiment, the carbon number of the aryl group is 6 to 20. The aryl group may be a monocyclic aryl group such as a phenyl group, a biphenyl group, or a terphenyl group, but is not limited thereto. The polycyclic aryl group may be a naphthyl group, an anthracenyl group, a phenanthryl group, a pyrenyl group, a perylenyl group, a chrysenyl group, a fluorenyl group, and the like, but is not limited thereto.

등이 될 수 있다. 다만, 이에 한정되는 것은 아니다.In the present specification, the fluorenyl group may be substituted, and two substituents may be bonded to each other to form a spiro structure. When the fluorenyl group is substituted,

etc. can be However, the present invention is not limited thereto.

In the present specification, the heterocyclic group is a heterocyclic group including at least one of O, N, Si and S as a heterogeneous element, and the number of carbon atoms is not particularly limited, but it is preferably from 2 to 60 carbon atoms. Examples of the heterocyclic group include a thiophene group, a furan group, a pyrrole group, an imidazole group, a thiazole group, an oxazole group, an oxadiazole group, a triazole group, a pyridyl group, a bipyridyl group, a pyrimidyl group, a triazine group, an acridyl group , pyridazine group, pyrazinyl group, quinolinyl group, quinazoline group, quinoxalinyl group, phthalazinyl group, pyrido pyrimidinyl group, pyrido pyrazinyl group, pyrazino pyrazinyl group, isoquinoline group, indole group , carbazole group, benzoxazole group, benzoimidazole group, benzothiazole group, benzocarbazole group, benzothiophene group, dibenzothiophene group, benzofuranyl group, phenanthroline group, isoxazolyl group, thiadia and a jolyl group, a phenothiazinyl group, and a dibenzofuranyl group, but is not limited thereto.

In the present specification, the aryl group in the aralkyl group, the aralkenyl group, the alkylaryl group, and the arylamine group is the same as the example of the aryl group described above. In the present specification, the alkyl group among the aralkyl group, the alkylaryl group, and the alkylamine group is the same as the above-described alkyl group. In the present specification, as for heteroaryl among heteroarylamines, the description of the above-described heterocyclic group may be applied. In the present specification, the alkenyl group among the aralkenyl groups is the same as the above-described examples of the alkenyl group. In the present specification, the description of the above-described aryl group may be applied except that arylene is a divalent group. In the present specification, the description of the above-described heterocyclic group may be applied, except that heteroarylene is a divalent group. In the present specification, the hydrocarbon ring is not a monovalent group, and the description of the above-described aryl group or cycloalkyl group may be applied, except that it is formed by combining two substituents. In the present specification, the heterocyclic group is not a monovalent group, and the description of the above-described heterocyclic group may be applied, except that it is formed by combining two substituents.

compound

The compound of the present invention is represented by the above formula (1).

Preferably, Chemical Formula 1 may be represented by any one of the following Chemical Formulas 1-1 to 1-4:

[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

[Formula 1-4]

In Formulas 1-1 to 1-4,

Ar ₁ , Ar _{2 ,} and L ₁ are the same as defined in Formula 1 above.

Preferably, Ar ₁ and Ar ₂ are each independently selected from substituted or unsubstituted C _6-20 aryl; Or it may be _{a C 2-20} heteroaryl comprising at least one selected from the group consisting of substituted or unsubstituted N, O and S,

More preferably, Ar ₁ and Ar ₂ are each independently phenyl, phenyl substituted with 1 methyl, phenyl substituted with 1 tertbutyl, phenyl substituted with triphenylsilyl, phenyl substituted with phenyl carbazolyl, naphthyl, naphthyl substituted with benzofuran, naphthyl substituted with benzothiophene, dibenzofuranyl, dibenzothiophenyl, or phenyl carbazolyl;

More preferably, Ar ₁ and Ar ₂ are each independently phenyl, 3-methyl phenyl, 4-tertbutyl phenyl, 3-(triphenylsilyl)phenyl, 4-(triphenylsilyl)phenyl, (9-phenyl -9H-carbazol-2-yl)phenyl, naphthyl, naphthyl substituted with benzofuran, naphthyl substituted with benzothiophene, dibenzofuranyl, dibenzothiophenyl, or 9-phenyl-9H-carba can be sleepy

Most preferably, Ar ₁ and Ar ₂ may each independently be any one selected from the group consisting of:

.

.

Preferably _{, at least one of Ar 1} and Ar ₂ may be a substituted or unsubstituted C _6-20 aryl,

More preferably _{, at least one of Ar 1} and Ar ₂ may be substituted or unsubstituted phenyl,

More preferably _{, at least one of Ar 1} and Ar ₂ is phenyl, phenyl substituted with 1 methyl, phenyl substituted with 1 tertbutyl, phenyl substituted with triphenylsilyl, or phenylyl substituted with phenyl carbazolyl can,

Most preferably _{, at least one of Ar 1} and Ar ₂ may be any one selected from the group consisting of:

.

.

Preferably, L ₁ is a single bond, substituted or unsubstituted C _6-20 arylene, -NRa-, -(substituted or unsubstituted C _6-20 arylene)-NRa-, -O-, or - (substituted or unsubstituted C _6-20 arylene)-O-,

More preferably, L ₁ may be a single bond, phenylene, -O-, or any one selected from the group consisting of:

.

.

Most preferably, L ₁ may be any one selected from the group consisting of a single bond, 1,2-phenylene, 1,3-phenylene, 1,4-phenylene, -O-, or the following :

.

.

Preferably, R a is substituted or unsubstituted C _6-20 aryl; Or it may be _{a C 2-20} heteroaryl comprising at least one selected from the group consisting of substituted or unsubstituted N, O and S,

More preferably Ra can be phenyl, naphthyl, phenyl substituted with one tertbutyl, phenyl substituted with trimethylsilyl, phenyl substituted with triphenylsilyl, benzofuranyl, benzothiophenyl, or phenyl carbazolyl .

Representative examples of the compound represented by Formula 1 are as follows:

.

.

On the other hand, when the compound represented by Formula 1 is represented by Formula 1-1, for example, by the method shown in Scheme 1 below; When represented by Formula 1-2, for example, in the same manner as in Scheme 2 below; When represented by Formula 1-3, for example, in the same manner as in Scheme 3 below; When represented by Formula 1-4, for example, in the same manner as in Scheme 4 below; When represented by Formula 1-4 and L ₁ is -NRa-, in the same manner as in Scheme 5 below; When represented by Formula 1-4 and L ₁ is -(phenylene)-O-, it may be prepared in the same manner as in Scheme 6 below, and other compounds may be prepared similarly.

[Scheme 1]

[Scheme 2]

[Scheme 3]

[Scheme 4]

[Scheme 5]

[Scheme 6]

In Schemes 1 to 6, Ar ₁ , Ar _{2 ,} L ₁ and Ra are as defined in Formula 1 above, and X ₁ to X ₄ are each independently a halogen, preferably X ₁ to X ₄ are each independently as chloro, bromo, or iodo.

In Reaction Schemes 1 to 6, the reactors, catalysts, solvents, etc. used may be suitably changed for the desired product. The manufacturing method may be more specific in Preparation Examples to be described later.

coating composition

The compound represented by Formula 1 according to the present invention may be included in the organic material layer of the organic light emitting device through a solution process. To this end, the present invention provides a coating composition comprising the compound represented by Formula 1 and a solvent according to the present invention described above.

The solvent is not particularly limited as long as it is a solvent capable of dissolving or dispersing the compound represented by Formula 1, and for example, chloroform, methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene , chlorine-based solvents such as o-dichlorobenzene; ether solvents such as tetrahydrofuran and dioxane; aromatic hydrocarbon solvents such as toluene, xylene, trimethylbenzene, and mesitylene; aliphatic hydrocarbon solvents such as cyclohexane, methylcyclohexane, n-pentane, n-hexane, n-heptane, n-octane, n-nonane, and n-decane; ketone solvents such as acetone, methyl ethyl ketone, and cyclohexanone; ester solvents such as ethyl acetate, butyl acetate, and ethyl cellosolve acetate; Polyvalents such as ethylene glycol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, dimethoxyethane, propylene glycol, diethoxymethane, triethylene glycol monoethyl ether, glycerin, and 1,2-hexanediol alcohols and derivatives thereof; alcohol solvents such as methanol, ethanol, propanol, isopropanol and cyclohexanol; sulfoxide solvents such as dimethyl sulfoxide; and amide solvents such as N-methyl-2-pyrrolidone and N,N-dimethylformamide; benzoate solvents such as butyl benzoate and methyl-2-methoxy benzoate; tetralin; and solvents such as 3-phenoxy-toluene. In addition, the above-mentioned solvents may be used alone or as a mixture of two or more solvents.

In addition, each coating composition may further include one or two or more additives selected from the group consisting of a thermal polymerization initiator and a photopolymerization initiator.

As the thermal polymerization initiator, methyl ethyl ketone peroxide, methyl isobutyl ketone peroxide, acetylacetone peroxide, methylcyclohexanone peroxide, cyclohexanone peroxide, isobutyryl peroxide, 2,4-dichlorobenzoyl peroxide oxide, peroxides such as bis-3,5,5-trimethyl hexanoyl peroxide, lauryl peroxide, benzoyl peroxide, or azobis isobutylnitrile, azobisdimethylvaleronitrile, and azobiscyclohexyl nitrile azo family, but is not limited thereto.

As the photopolymerization initiator, diethoxy acetophenone, 2,2-dimethoxy-1,2-diphenyl ethan-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, 4-(2-hydroxyethoxy ) Phenyl- (2-hydroxy-2-propyl) ketone, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butanone-1,2-hydroxy-2-methyl-1- Phenyl propan-1-one, 2-methyl-2-morpholino (4-methyl thio phenyl) propan-1-one, 1-phenyl-1,2-propanedione-2- (o-ethoxycarbonyl) Acetophenone-type or ketal-type photoinitiators, such as an oxime; benzoin ether-based photopolymerization initiators such as benzoin, benzoin methyl ether, and benzoin ethyl ether; benzophenone-based photopolymerization initiators such as benzophenone, 4-hydroxybenzophenone, 2-benzoylnaphthalene, 4-benzoylbiphenyl, and 4-benzoylphenyl ether; thioxanthone-based photopolymerization initiators such as 2-isopropylthioxanthone, 2-chlorothioxanthone, 2,4-dimethyl thioxanthone, 2,4-diethylthioxanthone, and 2,4-dichlorothioxanthone; and ethyl anthraquinone, 2,4,6-trimethylbenzoyl diphenyl phosphine oxide, 2,4,6-trimethylbenzoyl phenyl ethoxy phosphine oxide, bis (2,4,6-trimethylbenzoyl) phenyl phosphine oxide, Other photopolymerization initiators such as, but not limited to, bis(2,4-dimethoxy benzoyl)-2,4,4-trimethyl pentylphosphine oxide.

Moreover, what has a photoinitiator effect can also be used individually or in combination with the said photoinitiator. For example, triethanolamine, methyldiethanolamine, 4-dimethylaminobenzoate ethyl, 4-dimethylaminobenzoate isoamyl, benzoate (2-dimethylamino)ethyl, 4,4'-dimethylaminobenzophenone, etc., but this not limited

In addition, the viscosity of the coating composition is preferably 1 cP to 10 cP, and coating is easy in the above range. In addition, the concentration of the polymer according to the present invention in the coating composition is preferably 0.1 wt/v% to 20 wt/v%.

In addition, the present invention provides a method of forming a light emitting layer using the above-described coating composition. Specifically, on the anode; on the hole injection layer formed on the anode; Or on the hole transport layer formed on the hole injection layer formed on the anode, coating the coating composition according to the present invention as described above in a solution process; and heat-treating or light-treating the coated coating composition.

The solution process uses the coating composition according to the present invention described above, and refers to spin coating, dip coating, doctor blading, inkjet printing, screen printing, spraying, roll coating, and the like, but is not limited thereto.

The heat treatment temperature in the heat treatment step is preferably 150 to 230 ℃. In addition, the heat treatment time is 1 minute to 3 hours, more preferably 10 minutes to 1 hour. In addition, the heat treatment is preferably performed in an inert gas atmosphere such as argon or nitrogen. In addition, the step of evaporating the solvent may be further included between the coating step and the heat treatment or light treatment step.

organic light emitting device

In addition, the present invention provides an organic light emitting device including the compound represented by the formula (1). In one example, the present invention provides a first electrode; a second electrode provided to face the first electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one of the organic material layers includes the compound represented by Formula 1 above. do.

The organic material layer of the organic light emitting device of the present invention may have a single-layer structure, but may have a multi-layer structure in which two or more organic material layers are stacked. For example, the organic light emitting device of the present invention may have a structure including a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, etc. as an organic material layer. However, the structure of the organic light emitting device is not limited thereto and may include a smaller number of organic layers.

In addition, the organic layer may include an emission layer, and the emission layer may include a compound represented by Formula 1 above. In particular, Compound 1 according to the present invention may be used as a dopant in the emission layer.

Also, the organic layer may include a hole transport layer or a hole injection layer, and the hole transport layer or the hole injection layer may include the compound represented by Formula 1 above.

In addition, the organic layer may include an electron transport layer, an electron injection layer, or a layer that transports and injects electrons at the same time, and the electron transport layer, the electron injection layer, or a layer that simultaneously transports and injects electrons is represented by the above formula It may include a compound represented by 1.

In addition, the organic layer may include an emission layer or a hole transport layer, and the emission layer or the hole transport layer may include a compound represented by Formula 1 above.

Also, the organic light emitting device according to the present invention may be a normal type organic light emitting device in which an anode, one or more organic material layers, and a cathode are sequentially stacked on a substrate. Also, the organic light emitting device according to the present invention may be an inverted type organic light emitting device in which a cathode, one or more organic material layers, and an anode are sequentially stacked on a substrate. For example, the structure of the organic light emitting device according to an embodiment of the present invention is illustrated in FIGS. 1 and 2 .

FIG. 1 shows an example of an organic light emitting device including a substrate 1 , an anode 2 , a light emitting layer 3 , and a cathode 4 . In such a structure, the compound represented by Formula 1 may be included in the light emitting layer.

2 shows a substrate 1, an anode 2, a hole injection layer 5, a hole transport layer 6, a light emitting layer 3, an electron transport layer 7, an electron injection layer 8 and a cathode 4 An example of an organic light emitting device is shown. In such a structure, the compound represented by Formula 1 may be included in one or more of the hole injection layer, the hole transport layer, the light emitting layer, and the electron transport layer.

The organic light emitting device according to the present invention may be manufactured using materials and methods known in the art, except that at least one layer of the organic material layer includes the compound represented by Formula 1 above. Also, when the organic light emitting device includes a plurality of organic material layers, the organic material layers may be formed of the same material or different materials.

For example, the organic light emitting device according to the present invention may be manufactured by sequentially stacking a first electrode, an organic material layer, and a second electrode on a substrate. At this time, by using a PVD (physical vapor deposition) method such as sputtering or e-beam evaporation, a metal or conductive metal oxide or an alloy thereof is deposited on a substrate to form an anode. And, after forming an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer and an electron transport layer thereon, it can be prepared by depositing a material that can be used as a cathode thereon. In addition to this method, an organic light emitting device may be manufactured by sequentially depositing a cathode material, an organic material layer, and an anode material on a substrate.

In addition, the compound represented by Formula 1 may be formed into an organic material layer by a solution coating method as well as a vacuum deposition method when manufacturing an organic light emitting device. Here, the solution coating method refers to spin coating, dip coating, doctor blading, inkjet printing, screen printing, spraying, roll coating, and the like, but is not limited thereto.

In addition to this method, an organic light emitting device may be manufactured by sequentially depositing an organic material layer and an anode material from a cathode material on a substrate (WO 2003/012890). However, the manufacturing method is not limited thereto.

In one example, the first electrode is an anode, the second electrode is a cathode, or the first electrode is a cathode and the second electrode is an anode.

As the anode material, a material having a large work function is generally preferred so that holes can be smoothly injected into the organic layer. Specific examples of the anode material include metals such as vanadium, chromium, copper, zinc, gold, or alloys thereof; metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), and indium zinc oxide (IZO); combinations of metals and oxides such as ZnO:Al or SnO _{2 :Sb;} conductive polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene](PEDOT), polypyrrole, and polyaniline, but are not limited thereto.

The cathode material is preferably a material having a small work function to facilitate electron injection into the organic material layer. Specific examples of the anode material include metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin and lead, or alloys thereof; and a multilayer structure material such as LiF/Al or LiO ₂ /Al, but is not limited thereto.

The hole injection layer is a layer for injecting holes from the electrode, and as a hole injection material, it has the ability to transport holes, so it has a hole injection effect at the anode, an excellent hole injection effect with respect to the light emitting layer or the light emitting material, and is produced in the light emitting layer A compound which prevents the movement of excitons to the electron injection layer or the electron injection material and is excellent in the ability to form a thin film is preferable. Preferably, the highest occupied molecular orbital (HOMO) of the hole injection material is between the work function of the positive electrode material and the HOMO of the surrounding organic material layer. Specific examples of the hole injection material include metal porphyrin, oligothiophene, arylamine-based organic material, hexanitrile hexaazatriphenylene-based organic material, quinacridone-based organic material, and perylene-based organic material. of organic substances, anthraquinones, polyaniline and polythiophene-based conductive polymers, and the like, but are not limited thereto.

The hole transport layer is a layer that receives holes from the hole injection layer and transports them to the light emitting layer. As a hole transport material, a material capable of transporting holes from the anode or hole injection layer to the light emitting layer and transferring them to the light emitting layer. This is suitable. Specific examples include, but are not limited to, an arylamine-based organic material, a conductive polymer, and a block copolymer having a conjugated portion and a non-conjugated portion together.

The light emitting material is a material capable of emitting light in the visible ray region by receiving and combining holes and electrons from the hole transport layer and the electron transport layer, respectively, and a material having good quantum efficiency for fluorescence or phosphorescence is preferable. Specific examples include 8-hydroxy-quinoline aluminum complex (Alq ₃ ); carbazole-based compounds; dimerized styryl compounds; BAlq; 10-hydroxybenzo quinoline-metal compounds; compounds of the benzoxazole, benzthiazole and benzimidazole series; Poly(p-phenylenevinylene) (PPV)-based polymers; spiro compounds; polyfluorene, rubrene, etc., but is not limited thereto.

The emission layer may include a host material and a dopant material. The host material includes a condensed aromatic ring derivative or a compound containing a hetero ring. Specifically, condensed aromatic ring derivatives include anthracene derivatives, pyrene derivatives, naphthalene derivatives, pentacene derivatives, phenanthrene compounds, fluoranthene compounds, and the like, and heterocyclic-containing compounds include carbazole derivatives, dibenzofuran derivatives, ladder type Furan compounds, pyrimidine derivatives, and the like, but are not limited thereto.

Examples of the dopant material include an aromatic amine derivative, a strylamine compound, a boron complex, a fluoranthene compound, and a metal complex. Specifically, the aromatic amine derivative is a condensed aromatic ring derivative having a substituted or unsubstituted arylamino group, and includes pyrene, anthracene, chrysene, and periflanthene having an arylamino group, and the styrylamine compound is a substituted or unsubstituted derivative. It is a compound in which at least one arylvinyl group is substituted in the arylamine, and one or two or more substituents selected from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group and an arylamino group are substituted or unsubstituted. Specifically, there are styrylamine, styryldiamine, styryltriamine, styryltetraamine, and the like, but is not limited thereto. In addition, the metal complex includes, but is not limited to, an iridium complex, a platinum complex, and the like. Preferably, the compound represented by Formula 1 may be included as a dopant material.

The electron transport layer is a layer that receives electrons from the electron injection layer and transports them to the light emitting layer. As an electron transport material, a material that can receive electrons from the cathode and transfer them to the light emitting layer is suitable. Do. Specific examples include Al complex of 8-hydroxyquinoline; complexes containing Alq _{3 ;} organic radical compounds; hydroxyflavone-metal complexes, and the like, but are not limited thereto. The electron transport layer may be used with any desired cathode material as used in accordance with the prior art. In particular, examples of suitable cathode materials are conventional materials having a low work function and followed by a layer of aluminum or silver. Specifically cesium, barium, calcium, ytterbium and samarium, followed in each case by an aluminum layer or a silver layer.

The electron injection layer is a layer that injects electrons from the electrode, has the ability to transport electrons, has an electron injection effect from the cathode, an excellent electron injection effect on the light emitting layer or the light emitting material, and hole injection of excitons generated in the light emitting layer. A compound which prevents movement to a layer and is excellent in the ability to form a thin film is preferable. Specifically, fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, preorenylidene methane, anthrone, etc., derivatives thereof, metals complex compounds and nitrogen-containing 5-membered ring derivatives, but are not limited thereto.

Examples of the metal complex compound include 8-hydroxyquinolinato lithium, bis(8-hydroxyquinolinato)zinc, bis(8-hydroxyquinolinato)copper, bis(8-hydroxyquinolinato)manganese, Tris(8-hydroxyquinolinato)aluminum, tris(2-methyl-8-hydroxyquinolinato)aluminum, tris(8-hydroxyquinolinato)gallium, bis(10-hydroxybenzo[h] Quinolinato) beryllium, bis (10-hydroxybenzo [h] quinolinato) zinc, bis (2-methyl-8-quinolinato) chlorogallium, bis (2-methyl-8-quinolinato) ( o-crezolato)gallium, bis(2-methyl-8-quinolinato)(1-naphtolato)aluminum, bis(2-methyl-8-quinolinato)(2-naphtolato)gallium, etc. However, the present invention is not limited thereto.

The organic light emitting device according to the present invention may be a top emission type, a back emission type, or a double side emission type depending on the material used.

In addition, the compound represented by Formula 1 may be included in an organic solar cell or an organic transistor in addition to the organic light emitting device.

Hereinafter, preferred examples are presented to help the understanding of the present invention. However, the following examples are only provided for easier understanding of the present invention, and the content of the present invention is not limited thereto.

[Production Example]

Preparation Example 1: Preparation of compound 6

Step 1-1: Preparation of intermediate compound 3

Compound 1 (1.0 eq.), Compound 2 (1.4 eq.), and NaO t -Bu (2.0 eq.) were placed in a round bottom flask and dissolved in anhydrous toluene. After raising the bath temperature to 110 °C, Pd(( t -Bu) ₃ P) ₂ (3 mol%) was added dropwise and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to obtain an intermediate compound 3 (yield 92%).

m/z [M+H] ⁺ = 498.

Step 1-2: Preparation of intermediate compound 4

Compound 3 (1.0 eq.) was placed in a round bottom flask _{and dissolved in anhydrous CH 2} Cl ₂ (0.3 M). Pyridine (1.2 eq.) was added dropwise to the reaction mixture, and the bath temperature was lowered from room temperature to 0 °C and stirred. Tf ₂ O (1.2 eq.) was slowly added dropwise for 30 minutes using a dropping funnel, and the bath temperature was raised to room temperature and stirred for 4 hours. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to obtain an intermediate compound 4 (yield 99%).

m/z [M+H] ⁺ = 630.

Step 1-3: Preparation of intermediate compound 5

Compound 4 (1.0 eq.), triphenylphosphine (20 mol%), and triethylamine (5.0 eq.) were placed in a round bottom flask and dissolved in anhydrous THF (0.2 M). Pd ₂ (dba) ₃ ·CHCl ₃ (5 mol %) was added dropwise to the reaction under positive argon pressure. The reaction mixture was stirred at room temperature for 15 minutes, and diisopropylaminoborane (1 M solution in THF, 2 eq.) was slowly added dropwise. After raising the bath temperature from room temperature to 80 °C, the mixture was stirred for 12 hours. After the reaction, the reactant was cooled at 0 °C, and neopentyl glycol (1 M solution in THF, 2.4 eq.) was slowly added dropwise. The reaction was stirred at room temperature for 15 minutes. 1 M HCl (aq.) was slowly added dropwise to the reaction and passed through a celite pad. The passed solution was washed with dichloromethane and water to separate the organic layer _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure, and purified through column chromatography to obtain an intermediate compound 5 (yield 76%).

m/z [M+H] ⁺ =526.

Step 1-4: Preparation of compound 6

Compound 3 (1.0 eq.), Compound 5 (2.0 eq.), powdered activated 4 Å molecular sieves (1.0 g/mol), Cu(OAc) ₂ (1.0 eq.) and Et ₃ N (5.0 eq.) were mixed with a round bottom. It was placed in a flask and _{dissolved in anhydrous CH 2} Cl ₂ (0.3 M). After lowering the bath temperature from room temperature to 0 °C, the mixture was stirred in an air atmosphere for 6 hours. After the reaction, an excess of n-hexane was added dropwise to terminate the reaction, and filtration was performed to remove the remaining catalyst and molecular sieves. The passed solution was concentrated under reduced pressure, and purified by column chromatography to obtain compound 6 (yield 78%).

m/z [M+H] ⁺ =978.

Preparation Example 2: Preparation of compound 13

Step 2-1: Preparation of intermediate compound 9

Compound 7 (1.0 eq.), compound 8 (1.2 eq.), and NaO t -Bu (2.0 eq.) were placed in a round bottom flask and dissolved in anhydrous toluene. After raising the bath temperature to 110 °C, Pd(( t -Bu) ₃ P) ₂ (3 mol%) was added dropwise and stirred for 4 hours. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure, and purified through column chromatography to obtain an intermediate compound 9 (yield 81%).

m/z [M+H] ⁺ =274.

Step 2-2: Preparation of intermediate compound 11

1,4-dibromobenzene 10 (1.0 eq.), B ₂ pin ₂ (2.4 eq.), and KOAc (12.0 eq.) were placed in a round bottom flask and dissolved in anhydrous dioxnae (0.3 M). After raising the bath temperature to 120 °C, Pd(dppf)Cl ₂ (18 mol%) was added dropwise and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to prepare intermediate compound 11 (yield 70%).

m/z [M+H] ⁺ =331.

Step 2-3: Preparation of intermediate compound 12

An intermediate compound 12 (yield 57%) was obtained by preparing in the same manner as in Step 1-1 of Preparation Example 1, except that Compound 4 instead of Compound 1 and Compound 9 instead of Compound 2 were used.

m/z [M+H] ⁺ =600.

Step 2-4: Preparation of compound 13

Compound 12 (2.2 eq.) and compound 11 (1.0 eq.) were placed in a round bottom flask and dissolved in THF (0.3 M). _{K 2} CO ₃ (2.4 eq.) dissolved in water was injected. _{Pd(PPh 3} ) ₄ (6 mol%) was added dropwise under a bath temperature of 80° C. and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to prepare compound 13 (yield 79%).

m/z [M+H] ⁺ =1021.

Preparation Example 3: Preparation of compound 16

Step 3-1: Preparation of intermediate compound 15

1,3,5-tribromobenzene 14 (1.0 eq.), B ₂ pin ₂ (3.6 eq.), and KOAc (18.0 eq.) were placed in a round bottom flask and dissolved in anhydrous dioxnae (0.3 M). After raising the bath temperature to 120 °C, Pd(dppf)Cl ₂ (27 mol%) was added dropwise and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to prepare an intermediate compound 15 (yield 68%).

m/z [M+H] ⁺ =457.

Step 3-2: Preparation of compound 16

Compound 12 (3.3 eq.) and compound 15 (1.0 eq.) were placed in a round bottom flask and dissolved in THF (0.3 M). _{K 2} CO ₃ (3.6 eq.) dissolved in water was injected. _{Pd(PPh 3} ) ₄ (9 mol%) was added dropwise under a bath temperature of 80° C. and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure, and then purified through column chromatography to prepare compound 16 (yield 73%).

m/z [M+H] ⁺ =1493.

Preparation Example 4: Preparation of compound 17

CuI (10 mol%), LiNH ₂ (0.5 eq.), K ₃ PO ₄ (3 eq.) and Intermediate 12 (1.0 eq.) were placed in a round bottom flask and dissolved in anhydrous DMF (0.3 M). It was stirred for 24 hours under a bath temperature of 130 °C. After the reaction, internal standard solution 1,3-dimethoxybenzene (1.5 M in DMSO) was added dropwise. The organic layer was separated by washing with dichloromethane and water, _{and water was removed with MgSO 4} and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure, and then purified through column chromatography to prepare compound 17 (yield 60%).

m/z [M+H] ⁺ =1432.

Preparation Example 5: Preparation of compound 22

Step 5-1: Preparation of intermediate compound 19

Compound 15 (1.0 eq.) and compound 18 (3.3 eq.) were placed in a round bottom flask and dissolved in THF (0.3 M). _{K 2} CO ₃ (3.3 eq.) dissolved in water was injected. _{Pd(PPh 3} ) ₄ (9 mol%) was added dropwise under a bath temperature of 80° C. and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to prepare intermediate compound 19 (yield 91%).

m/z [M+H] ⁺ = 352.

Step 5-2: Preparation of intermediate compound 21

Compound 19 (1.0 eq.), compound 20 (3.3 eq.) and NaO t -Bu (6.0 eq.) were placed in a round bottom flask and dissolved in PhMe (0.3 M). Pd(P(t- Bu) ₃ ) ₂ (9 mol%) was added dropwise under a bath temperature of 110° C. and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to prepare intermediate compound 21 (yield 79%).

m/z [M+H] ⁺ = 749

Step 5-3: Preparation of compound 22

Compound 21 (1.0 eq.), compound 12 (3.3 eq.) and NaO t -Bu (6.0 eq.) were placed in a round bottom flask and dissolved in PhMe (0.3 M). Pd(P(t- Bu) ₃ ) ₂ (9 mol%) was added dropwise under a bath temperature of 110° C. and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to prepare compound 22 (yield 77%).

m/z [M+H] ⁺ = 2162.

Preparation Example 6: Preparation of compound 24

Step 6-1: Preparation of intermediate compound 23

Compound 14 (1.0 eq.), compound 20 (3.3 eq.) and NaO t -Bu (6.0 eq.) were placed in a round bottom flask and dissolved in PhMe (0.3 M). Pd(P(t- Bu) ₃ ) ₂ (9 mol%) was added dropwise under a bath temperature of 110° C. and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to prepare intermediate compound 23 (yield 71%).

m/z [M+H] ⁺ = 520.

Step 6-2: Preparation of compound 24

Compound 23 (1.0 eq.), compound 12 (3.3 eq.) and NaO t -Bu (6.0 eq.) were placed in a round bottom flask and dissolved in PhMe (0.3 M). Pd(P(t- Bu) ₃ ) ₂ (9 mol%) was added dropwise under a bath temperature of 110° C. and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to prepare compound 24 (yield 67%).

m/z [M+H] ⁺ = 1934.

Preparation Example 7: Preparation of compound 27

Step 7-1: Preparation of intermediate compound 30

Compound 12 (1.0 eq.), triphenylphosphine (20 mol%), and triethylamine (5.0 eq.) were placed in a round bottom flask and dissolved in anhydrous THF (0.2 M). Pd ₂ (dba) ₃ ·CHCl ₃ (5 mol %) was added dropwise to the reaction under positive argon pressure. The reaction mixture was stirred at room temperature for 15 minutes, and diisopropylaminoborane (1 M solution in THF, 2 eq.) was slowly added dropwise. After raising the bath temperature from room temperature to 80 °C, the mixture was stirred for 12 hours. After the reaction, the reactant was cooled at 0 °C, and neopentyl glycol (1 M solution in THF, 2.4 eq.) was slowly added dropwise. The reaction was stirred at room temperature for 15 minutes. 1 M HCl (aq.) was slowly added dropwise to the reaction mixture, and passed through a celite pad. The passed solution was washed with dichloromethane and water to separate the organic layer _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to prepare an intermediate compound 30 (yield 77%).

m/z [M+H] ⁺ = 518.

Step 7-2: Preparation of intermediate compound 26

Compound 15 (1.0 eq.) and compound 25 (3.3 eq.) were placed in a round bottom flask and dissolved in THF (0.3 M). _{K 2} CO ₃ (3.3 eq.) dissolved in water was injected. _{Pd(PPh 3} ) ₄ (9 mol%) was added dropwise under a bath temperature of 80° C. and stirred overnight. After the reaction, the organic layer was separated by washing with dichloromethane and water _{, water was removed with MgSO 4} , and passed through a Celite-Silica pad. The passed solution was concentrated under reduced pressure and purified through column chromatography to prepare an intermediate compound 26 (91% yield).

m/z [M+H] ⁺ = 355

Step 7-3: Preparation of compound 27

Round compound 26 (1.0 eq.), compound 30 (6.0 eq.), powdered activated 4 Å molecular sieves (1.0 g/mol), Cu(OAc) ₂ (3.0 eq.) and Et ₃ N (15.0 eq.) Put in a bottom flask and _{dissolved in anhydrous CH 2} Cl ₂ (0.3 M). After lowering the bath temperature from room temperature to 0 °C, the mixture was stirred in an air atmosphere for 6 hours. After the reaction, an excess of n-hexane was added dropwise to terminate the reaction, and filtration was performed to remove the remaining catalyst and molecular sieves. The passed solution was concentrated under reduced pressure and purified through column chromatography to obtain compound 27 (yield 73%).

m/z [M+H] ⁺ = 1769.

Preparation 8: Preparation of compound 29

Round compound 28 (1.0 eq.), compound 30 (6.0 eq.), powdered activated 4 Å molecular sieves (1.0 g/mol), Cu(OAc) ₂ (3.0 eq.) and Et ₃ N (15.0 eq.) It was placed in a bottom flask and _{dissolved in anhydrous CH 2} Cl ₂ (0.3 M). After lowering the bath temperature from room temperature to 0 °C, the mixture was stirred in an air atmosphere for 6 hours. After the reaction, an excess of n-hexane was added dropwise to terminate the reaction, and filtration was performed to remove the remaining catalyst and molecular sieves. The passed solution was concentrated under reduced pressure and purified through column chromatography to obtain compound 29 (yield 81%).

m/z [M+H] ⁺ = 1541.

[Example]

Example 1

A glass substrate coated with indium tin oxide (ITO) to a thickness of 500 Å was placed in distilled water in which detergent was dissolved and washed with ultrasonic waves. At this time, a product manufactured by Fischer Co. was used as the detergent, and distilled water that was secondarily filtered with a filter manufactured by Millipore Co. was used as the distilled water. After washing ITO for 30 minutes, ultrasonic washing was performed for 10 minutes by repeating twice with distilled water. After washing with distilled water, ultrasonic cleaning was performed with a solvent of isopropyl and acetone and dried. After washing the substrate for 5 minutes, the substrate was transported to a glove box.

On the ITO transparent electrode, a coating composition dissolved in 2 wt/v% cyclohexanone of the following compound B and the following compound C (weight ratio of 2:8) was spin-coated (4000 rpm) and heat treated at 200 ° C. for 30 minutes ( cured) to form a hole injection layer to a thickness of 400 Å. A coating composition dissolved in 6 wt/v% toluene of the following compound A (Mn: 27,900; Mw: 35,600; measured by GPC using PC Standard using Agilent 1200 series) on the hole injection layer was spin-coated (4000) rpm) and heat-treated at 200° C. for 30 minutes to form a hole transport layer having a thickness of 200 Å. A coating composition dissolved in 10 wt/v% cyclohexanone of the compound 6 prepared in Preparation Example 1 and the following compound D (weight ratio of 8:92) was spin-coated (4000 rpm) on the hole transport layer and 180° C. for 30 minutes A light emitting layer was formed to a thickness of 400 Å by heat treatment during After transferring to a vacuum evaporator, the following compound E was vacuum-deposited to a thickness of 350 Å on the light emitting layer to form an electron injection and transport layer. A cathode was formed by sequentially depositing LiF to a thickness of 10 Å and aluminum to a thickness of 1000 Å on the electron injection and transport layer.

In the above process, the deposition rate of the organic material was maintained at 0.4 to 0.7 Å/sec, the deposition rate of 0.3 Å/sec for LiF and 2 Å/sec for aluminum was maintained, and the vacuum degree during deposition was 2×10 ^-7 to 5 ×10 ^-8 torr was maintained.

Examples 2 to 8

An organic light emitting diode was manufactured in the same manner as in Example 1, except that the compound shown in Table 1 was used instead of Compound 6 as the dopant of the light emitting layer.

Comparative Example 1 and Comparative Example 2

An organic light emitting diode was manufactured in the same manner as in Example 1, except that the compound shown in Table 1 was used instead of Compound 6 as the dopant of the light emitting layer. In Table 1 below, compound F and compound G refer to the following compounds.

[Experimental example]

When a current is applied to the organic light emitting diodes prepared in the Examples and Comparative Examples, ^{the driving voltage at a current density of 10 mA/cm 2} , the external quantum efficiency (EQE), and the lifespan are measured. Table 1 shows. At this time, the external quantum efficiency (EQE) was calculated as "(the number of emitted photons)/(the number of injected charge carriers) * 100", and T90 is the time it takes for the luminance to decrease from the initial luminance (500 nit) to 90%. means

Emissive layer dopant drive voltage
(V @10mA/cm ² ) EQE
(% @10mA/cm ² ) Lifetime (hr)
(T90 @500 nits) Example 1 compound 6 4.67 8.19 135 Example 2 compound 13 4.59 8.23 121 Example 3 compound 16 4.61 8.13 111 Example 4 compound 17 4.70 8.17 120 Example 5 compound 22 4.65 8.21 103 Example 6 compound 24 4.63 8.16 115 Example 7 compound 27 4.59 8.25 117 Example 8 compound 29 4.67 8.21 120 Comparative Example 1 compound F 4.63 6.87 58 Comparative Example 2 compound G 4.61 7.11 67

As shown in Table 1, the organic light emitting device using the compound of the present invention as a dopant of the light emitting layer has very excellent characteristics in terms of conversion efficiency and lifespan compared to the organic light emitting device using the compound F or G of Comparative Example as a dopant of the light emitting layer. was found to represent

1: Substrate 2: Anode
3: light emitting layer 4: cathode
5: hole injection layer 6: hole transport layer
7: electron transport layer 8: electron injection layer

Claims (11)

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

In Formula 1,
Ar ₁ and Ar ₂ are each independently, substituted or unsubstituted C _6-60 aryl; _{Or substituted or unsubstituted C 2-60} heteroaryl comprising any one or more selected from the group consisting of N, O and S,
L ₁ is a single bond, substituted or unsubstituted C _6-60 arylene, -NRa-, -(substituted or unsubstituted C _6-60 arylene)-NRa-, -O-, or -(substituted or unsubstituted cyclic C _6-60 arylene)-O-,
Ra is substituted or unsubstituted C _6-60 aryl; _{Or substituted or unsubstituted C 2-60} heteroaryl comprising any one or more selected from the group consisting of N, O and S,
n is 2 and R is O; n is 3 and R is N; or n is 2 or 3, and R is an n-valent substituted or unsubstituted C _6-60 aromatic ring.
According to claim 1,
Formula 1 is represented by any one of the following Formulas 1-1 to 1-4,
compound:
[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

[Formula 1-4]

In Formulas 1-1 to 1-4,
Ar ₁ , Ar _{2 ,} and L ₁ are the same as defined in claim 1 .
According to claim 1,
Ar ₁ and Ar ₂ are each independently phenyl, phenyl substituted with one methyl, phenyl substituted with one tertbutyl, phenyl substituted with triphenylsilyl, phenyl substituted with phenyl carbazolyl, naphthyl, benzofuran is naphthyl substituted with, naphthyl substituted with benzothiophene, dibenzofuranyl, dibenzothiophenyl, or phenyl carbazolyl;
compound.
According to claim 1,
Ar ₁ and Ar ₂ are each independently any one selected from the group consisting of
compound:

.
According to claim 1,
At least one of Ar ₁ and Ar ₂ is substituted or unsubstituted phenyl,
compound.
According to claim 1,
at least one of Ar ₁ and Ar ₂ is phenyl, phenyl substituted with 1 methyl, phenyl substituted with 1 tertbutyl, phenyl substituted with triphenylsilyl, or phenyl substituted with phenyl carbazolyl;
compound.
According to claim 1,
At least one of Ar ₁ and Ar ₂ is any one selected from the group consisting of
compound:

.
According to claim 1,
L ₁ is a single bond, phenylene, -O-, or any one selected from the group consisting of
compound:

.
According to claim 1,
Ra is phenyl, naphthyl, phenyl substituted with one tertbutyl, phenyl substituted with trimethylsilyl, phenyl substituted with triphenylsilyl, benzofuranyl, benzothiophenyl, or phenyl carbazolyl;
compound.
According to claim 1,
The compound represented by Formula 1 is any one selected from the group consisting of
compound:

.
a first electrode; a second electrode provided to face the first electrode; and at least one organic material layer provided between the first electrode and the second electrode, wherein at least one of the organic material layers contains the compound according to any one of claims 1 to 10 doing,
organic light emitting device.

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