KR20230068301A - Novel compound and organic light emitting device comprising the same - Google Patents

Abstract

The present invention relates to a novel organic light-emitting material and an organic light-emitting device including the same. The compound represented by chemical formula 1 can improve the efficiency, low driving voltage, and/or lifespan characteristics of the organic light-emitting device. In chemical formula 1, X is a single bond, O, or S, and R1 and R2 are each independently hydrogen; heavy hydrogen; a halogen group; a nitrile group; a silyl group; substituted or unsubstituted C6-60 aryl; or a substituted or unsubstituted C2-60 heteroaryl including at least one selected from a group consisting of N, O, and S.

Description

Novel compound and organic light emitting device comprising the same {Novel compound and organic light emitting device comprising the same}

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

In general, the organic light emitting phenomenon refers to a phenomenon in which electrical energy is converted into light energy using an organic material. An organic light emitting device using an organic light emitting phenomenon has a wide viewing angle, excellent contrast, and a fast response time, and has 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, a cathode, and an organic material layer between the anode and the cathode. In order to increase the efficiency and stability of the organic light emitting device, the organic material layer is often composed of a multi-layered structure composed of different materials, and may include, for example, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer. In the structure of this organic light emitting device, when a voltage is applied between the two electrodes, holes are injected from the anode and electrons from the cathode are injected into the organic material layer, and when the injected holes and electrons meet, excitons are formed. When it falls back to the ground state, it glows.

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

Korean Patent Publication No. 10-2000-0051826

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

The present invention provides a compound represented by Formula 1 below:

[Formula 1]

In Formula 1,

X is a single bond, O, or S;

R ₁ and R ₂ are each independently hydrogen; heavy hydrogen; halogen group; nitrile group; Silyl group; Substituted or unsubstituted C _6-60 aryl; Or a substituted or unsubstituted C _2-60 heteroaryl containing at least one selected from the group consisting of N, O, and S;

a is an integer from 0 to 3;

b is an integer from 0 to 4;

L ₁ to L ₃ are each independently a single bond; Substituted or unsubstituted C _6-60 arylene; Or a substituted or unsubstituted C _2-60 heteroarylene containing at least one selected from the group consisting of N, O, and S,

Ar ₁ and Ar ₂ are each independently a substituted or unsubstituted C _6-60 aryl; or a substituted or unsubstituted C _2-60 heteroaryl containing at least one selected from the group consisting of N, O, and S; wherein, at least one of Ar ₁ and Ar ₂ is a substituent represented by Formula 2 below;

[Formula 2]

In Formula 2,

R ₃ is deuterium; halogen group; nitrile group; Silyl group; Substituted or unsubstituted C _6-60 aryl; Or a substituted or unsubstituted C _2-60 heteroaryl containing at least one selected from the group consisting of N, O, and S;

R ₁₁ to R ₁₄ are each independently -CH ₃ , -CH ₂ D, -CHD ₂ , or -CD ₃ ;

c is an integer from 0 to 7;

The silyl group means -Si(Z ₁ )(Z ₂ )(Z ₃ ), wherein Z ₁ to Z ₃ are each independently substituted or unsubstituted C _1-60 alkyl; or a substituted or unsubstituted C _6-60 aryl.

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

The compound represented by Chemical Formula 1 may be used as a material for an organic material layer of an organic light emitting device, and may improve efficiency, low driving voltage, and/or lifetime characteristics of an organic light emitting device. In particular, the compound represented by Formula 1 may be used as a hole injection, hole transport, light emission, electron transport, and/or electron injection material.

1 shows an example of an organic light emitting device composed of 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, an electron blocking layer 7, a light emitting layer 3, an electron injection and transport layer 8 and a cathode 4 It shows an example of an organic light emitting device made of. In this structure, the compound represented by Formula 1 may be included in the hole transport layer or the electron blocking layer.

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

The present invention provides a compound represented by Formula 1 above.

또는

는 다른 치환기에 연결되는 결합을 의미한다. In this specification,

or

means a bond connected to another substituent.

In this specification, the term "substituted or unsubstituted" means deuterium; halogen group; nitrile group; nitro group; hydroxy group; carbonyl group; ester group; imide group; amino group; phosphine oxide group; alkoxy group; aryloxy group; Alkyl thioxy group; Arylthioxy group; an alkyl sulfoxy group; aryl sulfoxy group; silyl group; boron group; an alkyl group; cycloalkyl group; alkenyl group; aryl group; aralkyl group; Aralkenyl group; Alkyl aryl group; Alkylamine group; Aralkylamine group; heteroarylamine group; Arylamine group; Arylphosphine group; Or substituted or unsubstituted with one or more substituents selected from the group consisting of a heteroaryl group containing one or more of N, O, and S atoms, or substituted or unsubstituted with two or more substituents linked to each other among the substituents exemplified above. . 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 of the carbonyl group is not particularly limited, but is preferably 1 to 40 carbon atoms. Specifically, it may be a substituent having the following structure, but is not limited thereto.

In the present specification, the ester group may be substituted with an aryl group having 6 to 25 carbon atoms or a straight-chain, branched-chain or cyclic chain alkyl group having 1 to 25 carbon atoms in the ester group. Specifically, it may be a substituent 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 is preferably 1 to 25 carbon atoms. Specifically, it may be a substituent having the following structure, but is not limited thereto.

In the present specification, the silyl group is specifically 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. but not limited to

In the present specification, the boron group specifically includes a trimethyl boron group, a triethyl boron group, a t-butyldimethyl boron group, a triphenyl boron group, a phenyl boron group, but is not limited thereto.

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

In the present specification, the alkyl group may be straight-chain or branched-chain, and the number of carbon atoms is not particularly limited, but is preferably 1 to 40. According to one embodiment, the number of carbon atoms of the alkyl group is 1 to 20. According to another exemplary embodiment, the number of carbon atoms of the alkyl group is 1 to 10. 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, etc., but is 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 one embodiment, the alkenyl group has 2 to 20 carbon atoms. According to another exemplary embodiment, the alkenyl group has 2 to 10 carbon atoms. 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, etc., but is 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 number of carbon atoms of the cycloalkyl group is 3 to 20. According to another exemplary embodiment, the number of carbon atoms of the cycloalkyl group is 3 to 6. 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 are 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 one embodiment, the number of carbon atoms of the aryl group is 6 to 30. According to one embodiment, the number of carbon atoms of the aryl group is 6 to 20. The aryl group may be a phenyl group, a biphenyl group, a terphenyl group, etc. as a monocyclic aryl group, but is not limited thereto. The polycyclic aryl group may be a naphthyl group, anthracenyl group, phenanthryl group, pyrenyl group, perylenyl group, chrysenyl group, 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. However, it is not limited thereto.

In the present specification, the heteroaryl group is a heteroaryl group containing one or more of O, N, Si, and S as heterogeneous elements, and the number of carbon atoms is not particularly limited, but preferably has 2 to 60 carbon atoms. According to one embodiment, the heteroaryl group has 6 to 30 carbon atoms. According to one embodiment, the carbon number of the heteroaryl group is 6 to 20. Examples of the heteroaryl 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, and an acridyl group. , pyridazine group, pyrazinyl group, quinolinyl group, quinazoline group, quinoxalinyl group, phthalazinyl group, pyridopyrimidinyl group, pyridopyrazinyl group, pyrazinopyrazinyl 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 A zolyl group, a phenothiazinyl group, and a dibenzofuranyl group, but are not limited thereto.

In the present specification, an aralkyl group, an aralkenyl group, an alkylaryl group, and an aryl group among arylamine groups are the same as the examples 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 examples of the above-mentioned alkyl group. In the present specification, the description of the heteroaryl group described above may be applied to the heteroaryl of the heteroarylamine. In the present specification, the alkenyl group among the aralkenyl groups is the same as the examples of the alkenyl group described above. In the present specification, the description of the aryl group described above may be applied except that the arylene is a divalent group. In the present specification, the description of the heteroaryl group described above 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 aryl group or cycloalkyl group described above may be applied, except that the hydrocarbon ring is formed by combining two substituents. In the present specification, heteroaryl is not a monovalent group, and the description of the above-described heteroaryl group may be applied, except that it is formed by combining two substituents.

In this specification, 'D' is deuterium.

Preferably, R ₁ and R ₂ are each independently hydrogen; heavy hydrogen; Substituted or unsubstituted C _6-20 aryl; Or it may be a substituted or unsubstituted C _2-20 heteroaryl containing at least one selected from the group consisting of N, O, and S.

일 수 있고, 상기 R₁ 및 R₂가 각각 페닐, 1개 또는 2개의 터트뷰틸로 치환된 페닐, 비페닐릴, 나프틸, 또는

인 경우, 상기 페닐, 1개 또는 2개의 터트뷰틸로 치환된 페닐, 비페닐릴, 나프틸, 또는

는 비치환되거나 하나 이상의 중수소로 치환될 수 있다.More preferably, R ₁ and R ₂ are each independently selected from hydrogen, deuterium, phenyl, phenyl substituted with one or two tertbutyl groups, biphenylyl, naphthyl, or

, wherein R ₁ and R ₂ are each phenyl, phenyl, biphenylyl, naphthyl substituted with 1 or 2 tertbutyl groups, or

In the case of , the phenyl, phenyl, biphenylyl, naphthyl substituted with one or two tertbutyl, or

may be unsubstituted or substituted with one or more deuterium.

Preferably, L ₁ to L ₃ are each independently a single bond; A substituted or unsubstituted C _6-20 arylene; Or it may be a substituted or unsubstituted C _2-20 heteroarylene containing at least one selected from the group consisting of N, O, and S;

More preferably, L ₁ to L ₃ may each independently represent a single bond, phenylene, or phenylene substituted with 4 deuterium atoms.

Preferably, Ar ₁ and Ar ₂ are each independently substituted or unsubstituted C _6-20 aryl; Or a substituted or unsubstituted C _2-20 heteroaryl containing at least one selected from the group consisting of N, O, and S; wherein, at least one of Ar ₁ and Ar ₂ may be a substituent represented by Formula 2 below. there is;

[Formula 2]

More preferably, in Ar ₁ and Ar ₂ , R ₃ of Formula 2 is hydrogen or deuterium, and c may be an integer of 0 to 7.

이고, 상기 Ar₁ 및 Ar₂는 비치환되거나 하나 이상의 중수소로 치환될 수 있되, Ar₁ 및 Ar₂ 중 적어도 하나는 비치환되거나 하나 이상의 중수소로 치환된

일 수 있다. More preferably, Ar ₁ and Ar ₂ are each independently phenyl, phenyl substituted with 1 tertbutyl, phenyl substituted with 1 adamantyl, biphenylyl, terphenylyl, naphthyl, phenyl naphthyl , naphthylphenyl, dimethylfluorenyl, phenylfluorenyl, diphenylfluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, or

And, wherein Ar ₁ and Ar ₂ may be unsubstituted or substituted with one or more deuterium, but at least one of Ar ₁ and Ar ₂ is unsubstituted or substituted with one or more deuterium.

can be

,

,

, 또는

일 수 있다:Most preferably, Ar ₁ and Ar ₂ are each independently any one selected from the group consisting of, but at least one of Ar ₁ and Ar ₂

,

,

, or

can be:

.

.

Preferably, the substituent represented by Formula 2 may be any one selected from the group consisting of:

.

.

Preferably, each of R ₁₁ to R ₁₄ may be -CH ₃ .

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

.

.

The compound represented by Chemical Formula 1 can be prepared by, for example, a manufacturing method such as the following Reaction Scheme 1, and other compounds can be prepared similarly.

[Scheme 1]

In Scheme 1, X, R ₁ , R ₂ , a, b, L ₁ to L ₃ , Ar ₁ and Ar ₂ are as defined in Formula 1, Z is halogen, preferably Z is chloro or it's bromo

Reaction Scheme 1 is an amine substitution reaction, which is preferably carried out in the presence of a palladium catalyst and a base, and the reactor for the amine substitution reaction can be changed as known in the art. The manufacturing method may be more specific in Preparation Examples to be described later.

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

The organic material layer of the organic light emitting device of the present invention may have a single-layer structure, or 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, an electron blocking layer, a light emitting layer, an electron transport layer, an electron injection layer, and the like as organic layers. However, the structure of the organic light emitting device is not limited thereto and may include more or fewer organic material layers.

In addition, the organic material layer may include a hole transport layer, a hole injection layer, a layer that simultaneously transports and injects holes, or an electron blocking layer, and the hole transport layer, the hole injection layer, and a layer that simultaneously transports and injects holes. Alternatively, the electron blocking layer may include the 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. In addition, the organic light emitting device according to the present invention may be an organic light emitting device of an inverted type in which a cathode, one or more organic material layers, and an anode are sequentially stacked on a substrate. For example, the structure of an organic light emitting device according to an embodiment of the present invention is illustrated in FIGS. 1 and 2 .

1 shows an example of an organic light emitting device composed of a substrate 1, an anode 2, a light emitting layer 3 and a cathode 4. In this structure, the compound represented by Chemical 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, an electron blocking layer 7, a light emitting layer 3, an electron injection and transport layer 8 and a cathode 4 It shows an example of an organic light emitting device made of. In this structure, the compound represented by Formula 1 may be included in the hole transport layer or the electron blocking 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 of the organic layers includes the compound represented by Chemical Formula 1. 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 physical vapor deposition (PVD) method such as sputtering or e-beam evaporation, depositing a metal or a metal oxide having conductivity or an alloy thereof on the substrate to form an anode And, after forming an organic material layer including a hole injection layer, a hole transport layer, an electron suppression 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 Chemical Formula 1 may be formed as 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 means spin coating, dip coating, doctor blading, inkjet printing, screen printing, spraying, roll coating, etc., but is not limited to these.

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

In one example, the first electrode is an anode and 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 high work function is generally preferred so that holes can be smoothly injected into the organic layer. Specific examples of the cathode material include metals such as vanadium, chromium, copper, zinc, and 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 so as to easily inject electrons 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; There are multi-layered materials such as LiF/Al or LiO ₂ /Al, but are not limited thereto.

The hole injection layer is a layer for injecting holes from the electrode, and the hole injection material has the ability to transport holes and has a hole injection effect at the anode, an excellent hole injection effect for the light emitting layer or the light emitting material, and generated in the light emitting layer A compound that prevents migration of excitons to the electron injecting layer or electron injecting material and has excellent thin film formation ability is preferred. It is preferable that the highest occupied molecular orbital (HOMO) of the hole injection material is between the work function of the anode material and the HOMO of the surrounding organic layer. Specific examples of the hole injection material include metal porphyrins, oligothiophenes, arylamine-based organic materials, hexanitrilehexaazatriphenylene-based organic materials, quinacridone-based organic materials, and perylene-based organic materials. of organic materials, anthraquinone, polyaniline, and polythiophene-based conductive polymers, but are not limited thereto.

The hole transport layer is a layer that receives holes from the hole injection layer and transports the holes to the light emitting layer. As a hole transport material, a material capable of receiving holes from the anode or the hole injection layer and transferring them to the light emitting layer is a material having high hole mobility. this is suitable Specific examples include, but are not limited to, arylamine-based organic materials, conductive polymers, and block copolymers having both conjugated and non-conjugated parts. Preferably, the compound represented by Chemical Formula 1 may be used as the hole transport layer material.

On the other hand, in the present invention, the "hole injection and transport layer" is a layer that performs both the role of the hole injection layer and the hole transport layer, and materials that play the role of each layer may be used alone or in combination, but are limited thereto. It doesn't work.

The electron blocking layer is a layer placed between the hole transport layer and the light emitting layer to prevent electrons injected from the cathode from passing to the hole transport layer without recombination in the light emitting layer, and is also called an electron blocking layer. A material having a smaller electron affinity than the electron transport layer is preferable for the electron blocking layer. Preferably, the compound represented by Chemical Formula 1 may be used as the electron blocking layer material.

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-hydroxybenzoquinoline-metal compounds; compounds of the benzoxazole, benzthiazole and benzimidazole series; poly(p-phenylenevinylene) (PPV)-based polymers; spiro compounds; Polyfluorene, rubrene, etc., but are not limited thereto.

The light emitting 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, etc., and heterocyclic-containing compounds include carbazole derivatives, dibenzofuran derivatives, ladder type furan compounds, pyrimidine derivatives, etc., but are not limited thereto.

Dopant materials include aromatic amine derivatives, strylamine compounds, boron complexes, fluoranthene compounds, metal complexes, and the like. Specifically, aromatic amine derivatives are condensed aromatic ring derivatives having a substituted or unsubstituted arylamino group, such as pyrene, anthracene, chrysene, periplanthene, etc. having an arylamino group, and styrylamine compounds include substituted or unsubstituted arylamine is substituted with at least one arylvinyl group, wherein 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, etc., but is not limited thereto. In addition, metal complexes include, but are not limited to, iridium complexes and platinum complexes.

The electron transport layer is a layer that receives electrons from the electron injection layer and transports electrons to the light emitting layer. As the electron transport material, a material capable of receiving electrons from the cathode and transferring them to the light emitting layer is suitable. do. Specific examples include Al complexes 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 can be used with any desired cathode material as used according to the prior art. In particular, examples of suitable cathode materials are conventional materials having a low work function followed by a layer of aluminum or silver. Specifically cesium, barium, calcium, ytterbium and samarium, followed in each case by a layer of aluminum or silver.

The electron injection layer is a layer for injecting electrons from an electrode, has the ability to transport electrons, has an excellent electron injection effect from a cathode, an excellent electron injection effect for a light emitting layer or a light emitting material, and injects holes of excitons generated in the light emitting layer. A compound that prevents migration to a layer and has excellent thin film forming ability is preferred. Specifically, fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylenetetracarboxylic acid, preonylidene methane, anthrone, etc. and their derivatives, 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)( There are o-cresolato) gallium, bis(2-methyl-8-quinolinato)(1-naphtolato)aluminum, and bis(2-methyl-8-quinolinato)(2-naphtolato)gallium. Not limited to this.

On the other hand, in the present invention, the "electron injection and transport layer" is a layer that performs both the roles of the electron injection layer and the electron transport layer, and materials that play the role of each layer may be used alone or in combination, but are limited thereto. It doesn't work.

The organic light emitting device according to the present invention may be a bottom emission device, a top emission device, or a double-sided light emitting device, and in particular, may be a bottom emission device requiring relatively high light emitting efficiency.

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

Preparation of the compound represented by Chemical Formula 1 and the organic light emitting device including the same will be described in detail in the following examples. However, the following examples are intended to illustrate the present invention, and the scope of the present invention is not limited thereto.

<Synthesis example>

Synthesis Example 1. Synthesis of Compound 1

2'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and N-([1,1'-biphenyl]-4-yl)-5,5,8 Toluene (300 ml) was added to ,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-amine (19.85 g, 55.84 mmol) and sodium tert-butoxide (7.37 g, 76.65 mmol) Then, the mixture was heated and stirred for 10 minutes. After adding bis(tri-tert-butylphosphine)palladium (0.14 g, 0.27 mmol) dissolved in toluene (30ml) to the mixture, the mixture was heated and stirred for 1 hour. After completion of the reaction and filtration, layers were separated into toluene and water. After solvent removal, compound 1 (27.5 g, 78.49% yield) was obtained by recrystallization with ethyl acetate. (MS: [M+H] ⁺ = 640)

Synthesis Example 2. Synthesis of Compound 2

2'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and 5,5,8,8-tetramethyl-N-(4-(naphthalen-1-yl) Compound 2 (29.5 g, 78.09% yield) was obtained in the same manner as in Synthesis Example 1 using phenyl) -5,6,7,8-tetrahydronaphthalen-2-amine (22.65 g, 55.84 mmol). .(MS: [M+H] ⁺ = 690)

Synthesis Example 3. Synthesis of Compound 3

2'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and 9,9-dimethyl-N-(5,5,8,8-tetramethyl-5,6 Compound 3 (28.5 g, 76.55% yield) in the same manner as in Synthesis Example 1 using ,7,8-tetrahydronaphthalen-2-yl) -9H-fluoren-2-amine (22.09 g, 55.84 mmol) ) was obtained. (MS: [M+H] ⁺ = 680)

Synthesis Example 4. Synthesis of Compound 4

2'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and N-(4-(tert-butyl)phenyl)-5,5,8,8-tetramethyl Compound 4 (26.5 g, 78.08% yield) was obtained in the same manner as in Synthesis Example 1 using -5,6,7,8-tetrahydronaphthalen-2-amine (19.85 g, 55.84 mmol). ( MS: [M+H] ⁺ = 620)

Synthesis Example 5. Synthesis of Compound 5

2'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and N-(5,5,8,8-tetramethyl-5,6,7,8-tetra Hydronaphthalen-2-yl)dibenzo[b,d]furan-3-amine (20.63 g, 55.84 mmol) was used to obtain Compound 5 (28.0 g, 78.21% yield) in the same manner as in Synthesis Example 1. (MS: [M+H] ⁺ = 654)

Synthesis Example 6. Synthesis of Compound 6

2'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro Compound 6 (29.0 g, 78.58% yield) was obtained in the same manner as in Synthesis Example 1 using naphthalen-2-yl)amine (21.76 g, 55.84 mmol). (MS: [M+H] ⁺ = 674)

Synthesis Example 7. Synthesis of Compound 7

2'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and N-(4-(5,5,8,8-tetramethyl-5,6,7, Compound 7 (30.5 g) was prepared in the same manner as in Synthesis Example 1 using 8-tetrahydronaphthalen-2-yl)phenyl)-[1,1'-biphenyl]-4-amine (24.10 g, 55.84 mmol). , 77.80% yield) was obtained. (MS: [M+H] ⁺ = 716)

Synthesis Example 8. Synthesis of Compound 8

2'-(4-chlorophenyl)spiro[adamanthene-2,9'-fluorene] (20.0 g, 50.38 mmol) and N-([1,1'-biphenyl]-4-yl)-5 Compound 8 (28.5 g, 28.5 g, 79.01 % yield) was obtained. (MS: [M+H] ⁺ = 716)

Synthesis Example 9. Synthesis of Compound 9

2'-(4-chlorophenyl)spiro[adamanthene-2,9'-fluorene] (20.0 g, 50.38 mmol) and bis(5,5,8,8-tetramethyl-5,6,7, Compound 9 (30.0 g, 79.38% yield) was obtained in the same manner as in Synthesis Example 1 using 8-tetrahydronaphthalen-2-yl)amine (20.02 g, 51.39 mmol). (MS: [M+ H] ⁺ = 750)

Synthesis Example 10. Synthesis of Compound 10

2'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and N-([1,1'-biphenyl]-4-yl)-5,5,8 Compound 10 (27.5 g, 78.49% yield) in the same manner as in Synthesis Example 1 using ,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-1-amine (19.85 g, 55.84 mmol) (MS: [M+H] ⁺ = 640)

Synthesis Example 11. Synthesis of Compound 11

2'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro Compound 11 (28.5 g, 77.23% yield) was obtained in the same manner as in Synthesis Example 1 using naphthalen-1-yl)amine (21.76 g, 55.84 mmol). (MS: [M+H] ⁺ = 674)

Synthesis Example 12. Synthesis of Compound 12

4'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro Compound 12 (28.5 g, 77.23% yield) was obtained in the same manner as in Synthesis Example 1 using naphthalen-1-yl)amine (21.76 g, 55.84 mmol). (MS: [M+H] ⁺ = 674)

Synthesis Example 13. Synthesis of Compound 13

4'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and N-([1,1'-biphenyl]-4-yl)-5,5,8 Compound 13 (27.5 g, 78.49% yield) in the same manner as in Synthesis Example 1 using ,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-amine (19.85 g, 55.84 mmol) (MS: [M+H] ⁺ = 640)

Synthesis Example 14. Synthesis of Compound 14

4'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro Compound 14 (29.0 g, 78.58% yield) was obtained in the same manner as in Synthesis Example 1 using naphthalen-2-yl)amine (21.76 g, 55.84 mmol). (MS: [M+H] ⁺ = 674)

Synthesis Example 15. Synthesis of Compound 15

3'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and N-([1,1'-biphenyl]-4-yl)-5,5,8 Compound 15 (27.0 g, 77.06% yield) in the same manner as in Synthesis Example 1 using ,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-amine (19.85 g, 55.84 mmol) (MS: [M+H] ⁺ = 640)

Synthesis Example 16. Synthesis of Compound 16

3'-bromospiro[adamanthene-2,9'-fluorene] (20.0 g, 54.75 mmol) and bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro Compound 16 (28.5 g, 77.23% yield) was obtained in the same manner as in Synthesis Example 1 using naphthalen-2-yl)amine (21.76 g, 55.84 mmol). (MS: [M+H] ⁺ = 674)

Synthesis Example 17. Synthesis of Compound 17

2'-bromospiro[adamanthene-2,9'-xanthine] (20.0 g, 52.45 mmol) and N-([1,1'-biphenyl]-4-yl)-5,5,8, Compound 17 (27.0 g, 78.48% yield) was prepared in the same manner as in Synthesis Example 1 using 8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-amine (19.02 g, 53.50 mmol). (MS: [M+H] ⁺ = 656)

Synthesis Example 18. Synthesis of Compound 18

2'-bromospiro[adamanthene-2,9'-xanthine] (20.0 g, 52.45 mmol) and bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene Compound 18 (28.5 g, 78.75% yield) was obtained in the same manner as in Synthesis Example 1 using -2-yl)amine (20.85 g, 53.50 mmol). (MS: [M+H] ⁺ = 690 )

Synthesis Example 19. Synthesis of Compound 19

3'-bromospiro[adamanthene-2,9'-xanthine] (20.0 g, 52.45 mmol) and N-([1,1'-biphenyl]-4-yl)-5,5,8, Compound 19 (27.0 g, 78.48% yield) was prepared in the same manner as in Synthesis Example 1 using 8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-amine (19.02 g, 53.50 mmol). (MS: [M+H] ⁺ = 656)

Synthesis Example 20. Synthesis of Compound 20

3'-bromospiro[adamanthene-2,9'-xanthine] (20.0 g, 52.45 mmol) and bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene Compound 20 (28.5 g, 78.75% yield) was obtained in the same manner as in Synthesis Example 1 using -2-yl)amine (20.85 g, 53.50 mmol). (MS: [M+H] ⁺ = 690 )

Synthesis Example 21. Synthesis of Compound 21

4'-bromospiro[adamanthene-2,9'-xanthine] (20.0 g, 52.45 mmol) and N-([1,1'-biphenyl]-4-yl)-5,5,8, Compound 21 (26.5 g, 77.03% yield) was prepared in the same manner as in Synthesis Example 1 using 8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-amine (19.02 g, 53.50 mmol). (MS: [M+H] ⁺ = 656)

Synthesis Example 22. Synthesis of Compound 22

4'-bromospiro[adamanthene-2,9'-xanthine] (20.0 g, 52.45 mmol) and bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalene Compound 22 (28.0 g, 77.37% yield) was obtained in the same manner as in Synthesis Example 1 using -2-yl)amine (20.85 g, 53.50 mmol). (MS: [M+H] ⁺ = 690 )

Synthesis Example 23. Synthesis of Compound 23

2'-bromospiro[adamanthene-2,9'-thioxanthine] (20.0 g, 50.33 mmol) and N-([1,1'-biphenyl]-4-yl)-5,5, Compound 23 (26.5 g, 78.35% yield) in the same manner as in Synthesis Example 1 using 8,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-amine (18.25 g, 51.34 mmol) ) was obtained. (MS: [M+H] ⁺ = 672)

Synthesis Example 24. Synthesis of Compound 24

2'-bromospiro[adamanthene-2,9'-thioxanthin] (20.0 g, 50.33 mmol) and bis(5,5,8,8-tetramethyl-5,6,7,8-tetra Compound 24 (28.0 g, 78.79% yield) was obtained in the same manner as in Synthesis Example 1 using hydronaphthalen-2-yl)amine (20.00 g, 51.34 mmol). (MS: [M+H] ⁺ = 706)

Synthesis Example 25. Synthesis of Compound 25

3'-bromospiro[adamanthene-2,9'-thioxanthine] (20.0 g, 50.33 mmol) and N-([1,1'-biphenyl]-4-yl)-5,5, Compound 25 (26.5 g, 78.35% yield) was prepared in the same manner as in Synthesis Example 1 using 8,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-amine (18.25 g, 51.34 mmol). ) was obtained. (MS: [M+H] ⁺ = 672)

Synthesis Example 26. Synthesis of Compound 26

3'-bromospiro[adamanthene-2,9'-thioxanthine] (20.0 g, 50.33 mmol) and bis(5,5,8,8-tetramethyl-5,6,7,8-tetra Compound 26 (28.0 g, 78.79% yield) was obtained in the same manner as in Synthesis Example 1 using hydronaphthalen-2-yl)amine (20.00 g, 51.34 mmol). (MS: [M+H] ⁺ = 706)

Synthesis Example 27. Synthesis of Compound 27

5'-chloro-2'-phenylspiro[adamanthene-2,9'-fluorene] (20.0 g, 50.38 mmol) and N-([1,1'-biphenyl]-4-yl)-5 Compound 27 (28.5 g, 28.5 g, 79.01 % yield) was obtained. (MS: [M+H] ⁺ = 716)

Synthesis Example 28. Synthesis of Compound 28

2'-chloro-4'-phenylspiro[adamanthene-2,9'-fluorene] (20.0 g, 50.38 mmol) and 9,9-dimethyl-N-(5,5,8,8-tetramethyl Compound 28 (30.0 g) was prepared in the same manner as in Synthesis Example 1 using -5,6,7,8-tetrahydronaphthalen-2-yl) -9H-fluoren-2-amine (20.33 g, 51.39 mmol). , 78.76% yield) was obtained. (MS: [M+H] ⁺ = 756)

Synthesis Example 29. Synthesis of Compound 29

2'-chloro-7'-phenylspiro[adamanthene-2,9'-fluorene] (20.0 g, 50.38 mmol) and 9,9-dimethyl-N-(5,5,8,8-tetramethyl Compound 29 (30.5 g) was prepared in the same manner as in Synthesis Example 1 using -5,6,7,8-tetrahydronaphthalen-2-yl) -9H-fluoren-2-amine (20.33 g, 51.39 mmol). , 80.01 % yield) was obtained. (MS: [M+H] ⁺ = 756)

Synthesis Example 30. Synthesis of Compound 30

2'-(4-(tert-butyl)phenyl)-7'-chlorospiro[adamanthene-2,9'-fluorene] (20.0 g, 44.14 mmol) and 9,9-dimethyl-N-(5 ,5,8,8-tetramethyl-5,6,7,8-tetrahydronaphthalen-2-yl) -9H-fluoren-2-amine (17.81 g, 45.03 mmol) using Synthesis Example 1 and Compound 30 (28.5 g, 79.50% yield) was obtained in the same manner. (MS: [M+H] ⁺ = 812)

Synthesis Example 31. Synthesis of Compound 31

N-([1,1'-biphenyl]-4-yl)-3'-phenylspiro[adamanthene-2,9'-fluorene]-2'-amine (20.0 g, 37.76 mmol) and 6 Compound 31 (21.0 g) was prepared in the same manner as in Synthesis Example 1 using -bromo-1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene (10.29 g, 38.51 mmol). , 77.67% yield) was obtained. (MS: [M+H] ⁺ = 716)

Synthesis Example 32. Synthesis of Compound 32

3'-(4-(tert-butyl)phenyl)-N-(9,9-dimethyl-9H-fluoren-2-yl)spiro[adamanthene-2,9'-fluorene]-2'- Synthesis Example 1 using amine (20.0 g, 31.95 mmol) and 6-bromo-1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene (8.71 g, 32.59 mmol) Compound 32 (20.0 g, 77.07% yield) was obtained in the same manner as above. (MS: [M+H] ⁺ = 812)

Synthesis Example 33. Synthesis of Compound 33

N-([1,1'-biphenyl]-4-yl)-3'-phenylspiro[adamanthene-2,9'-fluorene]-4'-amine (20.0 g, 37.76 mmol) and 6 Compound 33 (20.5 g) was prepared in the same manner as in Synthesis Example 1 using -bromo-1,1,4,4-tetramethyl-1,2,3,4-tetrahydronaphthalene (10.29 g, 38.51 mmol). , 75.82% yield) was obtained. (MS: [M+H] ⁺ = 716)

Synthesis Example 34. Synthesis of Compound 34

3'-phenylspiro[adamanthene-2,9'-fluorene]-2'-amine (15.0 g, 39.73 mmol) and 6-bromo-1,1,4,4-tetramethyl-1,2 After adding xylene (300 ml) to ,3,4-tetrahydronaphthalene (21.76 g, 81.45 mmol) and sodium tert-butoxide (10.69 g, 111.24 mmol), the mixture was heated and stirred for 10 minutes. After adding bis(tri-tert-butylphosphine)palladium (0.10 g, 0.20 mmol) dissolved in xylene (30ml) to the mixture, the mixture was heated and stirred for 1 hour. After completion of the reaction and filtration, layers were separated with xylene and water. After solvent removal, the compound 34 (23.5 g, 78.85% yield) was obtained by recrystallization with ethyl acetate. (MS: [M+H] ⁺ = 750)

<Example>

Example 1-1

A glass substrate coated with ITO (Indium Tin Oxide) to a thickness of 1400 Å was put in distilled water in which detergent was dissolved and washed with ultrasonic waves. At this time, a Fischer Co. product was used as the detergent, and distilled water filtered through a second filter of a Millipore Co. product was used as the distilled water. After washing the ITO for 30 minutes, ultrasonic cleaning was performed twice with distilled water for 10 minutes. After washing with distilled water, ultrasonic cleaning was performed with solvents such as isopropyl alcohol, acetone, and methanol, dried, and transported to a plasma cleaner. In addition, after cleaning the substrate for 5 minutes using oxygen plasma, the substrate was transferred to a vacuum deposition machine.

The following compound HAT was thermally vacuum deposited to a thickness of 100 Å on the prepared ITO transparent electrode to form a hole injection layer. After vacuum depositing the following compound HT1 to a thickness of 1150 Å as a hole transport layer thereon, compound 1 prepared in Synthesis Example 1 was thermally vacuum deposited to a thickness of 150 Å as an electron blocking layer. Subsequently, the following compound BH and the following compound BD were vacuum deposited to a thickness of 200 Å at a weight ratio of 25:1 as an emission layer. Subsequently, as a hole blocking layer, the following compound HB1 was vacuum deposited to a thickness of 50 Å. Subsequently, the following compound ET1 and the following compound Liq were thermally vacuum-deposited to a thickness of 310 Å in a weight ratio of 1:1 as a layer capable of simultaneously transporting and injecting electrons. An organic light emitting diode was manufactured by sequentially depositing lithium fluoride (LiF) to a thickness of 12 Å and aluminum to a thickness of 1000 Å to form a cathode on the electron transport and electron injection layers.

Examples 1-2 to 1-20 and Comparative Examples 1-1 to 1-4

The organic light emitting devices of Examples 1-2 to 1-20 and Comparative Examples 1-1 to 1-4 in the same manner as in Example 1-1, except that the compound shown in Table 1 was used instead of Compound 1. was produced. The structures of the compounds EB1 to EB4 used in Comparative Examples 1-1 to 1-4 are as follows.

<Experimental Example 1>

When a current of 10 mA/cm ² was applied to the organic light emitting devices prepared in Examples 1-1 to 1-20 and Comparative Examples 1-1 to 1-4, voltage, efficiency, color coordinates and lifetime were measured, and the results are shown in Table 1 below. Meanwhile, T95 means the time required for the luminance to decrease from the initial luminance (6000 nit) to 95%.

electron suppression layer Voltage (V,
@ 10mA/cm ² ) Efficiency (cd/A,
@ 10mA/cm ² ) Color coordinates (x, y) life span
(T95, hr) Example 1-1 compound 1 3.68 5.93 0.141, 0.043 180 Example 1-2 compound 2 3.67 5.94 0.140, 0.043 180 Example 1-3 compound 5 3.68 5.92 0.141, 0.044 185 Example 1-4 compound 6 3.66 5.95 0.140, 0.043 190 Example 1-5 compound 7 3.67 5.94 0.140, 0.043 185 Example 1-6 compound 8 3.68 5.91 0.140, 0.043 185 Examples 1-7 compound 9 3.69 5.94 0.140, 0.044 180 Examples 1-8 compound 12 3.72 5.97 0.141, 0.043 185 Examples 1-9 compound 13 3.71 5.96 0.140, 0.043 185 Examples 1-10 compound 14 3.71 5.98 0.140, 0.044 190 Example 1-11 compound 15 3.70 5.95 0.140, 0.043 180 Examples 1-12 compound 16 3.68 5.96 0.140, 0.043 185 Examples 1-13 compound 19 3.70 5.95 0.140, 0.043 180 Examples 1-14 compound 21 3.71 5.96 0.140, 0.043 185 Examples 1-15 compound 22 3.67 5.97 0.140, 0.043 190 Examples 1-16 compound 25 3.71 5.95 0.140, 0.043 185 Examples 1-17 compound 27 3.72 5.96 0.140, 0.044 190 Examples 1-18 compound 31 3.69 5.95 0.141, 0.043 190 Examples 1-19 compound 32 3.67 5.96 0.140, 0.043 185 Examples 1-20 compound 33 3.68 5.94 0.141, 0.044 185 Comparative Example 1-1 Compound EB1 4.12 5.48 0.144, 0.048 130 Comparative Example 1-2 Compound EB2 4.00 5.35 0.145, 0.049 125 Comparative Example 1-3 Compound EB3 3.90 5.19 0.145, 0.048 110 Comparative Example 1-4 Compound EB4 4.05 5.26 0.145, 0.049 105

As shown in Table 1, it was confirmed that the compound of the present invention has excellent electron suppression ability, and thus the organic light emitting device using the compound as an electron suppression layer exhibits remarkable effects in terms of driving voltage, efficiency, and lifetime.

Examples 2-1 to 2-27 and Comparative Examples 1-1 and 2-1 to 2-5

Example 2-1 in the same manner as in Example 1-1, except that the compound EB1 was used instead of Compound 1 as the electron blocking layer and the compound shown in Table 2 was used instead of the compound HT1 as the hole transport layer. to 2-27 and Comparative Examples 2-1 to 2-5 were fabricated. The structures of the compounds HT2 to HT6 used in Comparative Examples 2-1 to 2-5 are as follows.

<Experimental Example 2>

When a current of 10 mA/cm ² was applied to the organic light emitting devices prepared in Examples 2-1 to 2-27 and Comparative Examples 1-1 and 2-1 to 2-5, voltage, efficiency, color coordinates and lifetime were It was measured and the results are shown in Table 2 below. Meanwhile, T95 means the time required for the luminance to decrease from the initial luminance (6000 nit) to 95%.

hole transport layer Voltage (V,
@ 10mA/cm ² ) Efficiency (cd/A,
@ 10mA/cm ² ) Color coordinates (x, y) life span
(T95, hr) Example 2-1 compound 1 3.62 5.96 0.140, 0.044 185 Example 2-2 compound 3 3.61 5.97 0.141, 0.043 185 Example 2-3 compound 4 3.63 5.95 0.141, 0.043 185 Example 2-4 compound 6 3.60 5.97 0.140, 0.043 190 Example 2-5 compound 7 3.62 5.95 0.140, 0.043 185 Example 2-6 compound 8 3.61 5.96 0.140, 0.043 180 Examples 2-7 compound 9 3.63 5.94 0.140, 0.043 185 Example 2-8 compound 10 3.61 5.94 0.140, 0.043 185 Example 2-9 compound 11 3.62 5.96 0.140, 0.043 185 Examples 2-10 compound 12 3.68 5.99 0.140, 0.043 190 Examples 2-11 compound 14 3.67 5.98 0.141, 0.044 185 Examples 2-12 compound 16 3.65 5.96 0.140, 0.043 190 Example 2-13 compound 17 3.62 5.96 0.140, 0.043 190 Example 2-14 compound 18 3.62 5.97 0.140, 0.043 190 Example 2-15 compound 20 3.69 5.98 0.140, 0.043 185 Examples 2-16 compound 22 3.69 5.98 0.140, 0.044 190 Examples 2-17 compound 23 3.63 5.97 0.140, 0.044 185 Examples 2-18 compound 24 3.61 5.97 0.140, 0.043 185 Examples 2-19 compound 25 3.66 5.97 0.140, 0.043 180 Example 2-20 compound 26 3.64 5.98 0.140, 0.044 190 Example 2-21 compound 28 3.63 5.96 0.140, 0.043 185 Example 2-22 compound 29 3.62 5.94 0.140, 0.043 185 Example 2-23 compound 30 3.61 5.96 0.140, 0.043 180 Examples 2-24 compound 31 3.63 5.94 0.140, 0.043 185 Example 2-25 compound 32 3.62 5.98 0.140, 0.044 190 Examples 2-26 compound 33 3.68 5.97 0.141, 0.044 180 Example 2-27 compound 34 3.62 5.98 0.140, 0.043 185 Comparative Example 1-1 Compound HT1 4.12 5.48 0.144, 0.048 130 Comparative Example 2-1 Compound HT2 3.90 5.40 0.144, 0.049 135 Comparative Example 2-2 Compound HT3 3.95 5.46 0.144, 0.048 120 Comparative Example 2-3 compound HT4 3.92 5.38 0.144, 0.048 115 Comparative Example 2-4 Compound HT5 3.85 5.25 0.144, 0.049 125 Comparative Example 2-5 compound HT6 3.84 5.33 0.144, 0.049 135

As shown in Table 2, it was confirmed that the compound of the present invention has excellent hole transport ability, and thus the organic light emitting device using the compound as a hole transport layer exhibits remarkable effects in terms of driving voltage, efficiency and lifetime.

1: substrate 2: anode
3: light emitting layer 4: cathode
5: hole injection layer 6: hole transport layer
7: electron suppression layer 8: electron injection and transport layer

Claims (9)

A compound represented by Formula 1 below:
[Formula 1]

In Formula 1,
X is a single bond, O, or S;
R ₁ and R ₂ are each independently hydrogen; heavy hydrogen; halogen group; nitrile group; silyl group; Substituted or unsubstituted C _6-60 aryl; Or a substituted or unsubstituted C _2-60 heteroaryl containing at least one selected from the group consisting of N, O, and S;
a is an integer from 0 to 3;
b is an integer from 0 to 4;
L ₁ to L ₃ are each independently a single bond; Substituted or unsubstituted C _6-60 arylene; Or a substituted or unsubstituted C _2-60 heteroarylene containing at least one selected from the group consisting of N, O, and S,
Ar ₁ and Ar ₂ are each independently a substituted or unsubstituted C _6-60 aryl; or a substituted or unsubstituted C _2-60 heteroaryl containing at least one selected from the group consisting of N, O, and S; wherein, at least one of Ar ₁ and Ar ₂ is a substituent represented by Formula 2 below;
[Formula 2]

In Formula 2,
R ₃ is deuterium; halogen group; nitrile group; silyl group; Substituted or unsubstituted C _6-60 aryl; Or a substituted or unsubstituted C _2-60 heteroaryl containing at least one selected from the group consisting of N, O, and S;
R ₁₁ to R ₁₄ are each independently -CH ₃ , -CH ₂ D, -CHD ₂ , or -CD ₃ ;
c is an integer from 0 to 7;
The silyl group means -Si(Z ₁ )(Z ₂ )(Z ₃ ), wherein Z ₁ to Z ₃ are each independently substituted or unsubstituted C _1-60 alkyl; or a substituted or unsubstituted C _6-60 aryl.
According to claim 1,
R ₁ and R ₂ are each independently hydrogen, deuterium, phenyl, phenyl substituted with one or two tertbutyl groups, biphenylyl, naphthyl, or

ego,
Wherein R ₁ and R ₂ are each phenyl, phenyl, biphenylyl, naphthyl substituted with 1 or 2 tertbutyl groups, or

In the case of , the above phenyl, phenyl, biphenylyl, naphthyl substituted with one or two tertbutyl, or

Is unsubstituted or substituted with one or more deuterium,
compound.
According to claim 1,
L ₁ to L ₃ are each independently a single bond, phenylene, or phenylene substituted with 4 deuterium atoms;
compound.
According to claim 1,
Ar ₁ and Ar ₂ are each independently phenyl, phenyl substituted with 1 tertbutyl, phenyl substituted with 1 adamantyl, biphenylyl, terphenylyl, naphthyl, phenyl naphthyl, naphthyl phenyl, dimethylfluorenyl, phenylfluorenyl, diphenylfluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, or

And, Ar ₁ and Ar ₂ are unsubstituted or substituted with one or more deuterium,
At least one of Ar ₁ and Ar ₂ is unsubstituted or substituted with one or more deuterium

person,
compound.
According to claim 1,
The substituent represented by Formula 2 is any one selected from the group consisting of
compound:

.
According to claim 1,
Ar ₁ and Ar ₂ are each independently any one selected from the group consisting of
At least one of Ar ₁ and Ar ₂

,

,

, or

person,
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 one or more organic material layers provided between the first electrode and the second electrode, wherein at least one of the organic material layers includes the compound according to any one of claims 1 to 7. doing,
organic light emitting device.
According to claim 8,
The organic material layer is an electron suppression layer or a hole transport layer,
organic light emitting device.

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