KR102126201B1 - Compound for organic electronic element, organic electronic element using the same, and an electronic device thereof - Google Patents

Abstract

The present invention provides a novel compound capable of improving the luminous efficiency, stability and lifespan of a device, an organic electrical device using the same, and an electronic device thereof.

Description

Compounds for organic electrical devices, organic electrical devices using the same, and electronic devices thereof {COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF}

The present invention relates to a compound for an organic electric element, an organic electric element using the same, and an electronic device thereof.

In general, the organic light emitting phenomenon refers to a phenomenon that converts electrical energy into light energy using an organic material. An organic electric device using an organic light emitting phenomenon usually has a structure including an anode and a cathode and an organic material layer therebetween. Here, the organic material layer is often composed of a multi-layer structure composed of different materials in order to increase the efficiency and stability of the organic electric device, and may be formed of, for example, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer.

Materials used as the organic material layer in the organic electric device may be classified into light emitting materials and charge transport materials, such as hole injection materials, hole transport materials, electron transport materials, and electron injection materials, depending on their function.

Currently, the size of the portable display market is increasing as a large-area display, and accordingly, power consumption greater than that required in the existing portable display is required. Therefore, power consumption has become a very important factor in a portable display position that has a limited power supply, such as a battery, and efficiency and lifespan problems must also be solved.

Efficiency, life, and driving voltage are related to each other. As the efficiency increases, the driving voltage decreases relatively, and as the driving voltage decreases, crystallization of organic substances due to Joule heating generated during driving decreases, and as a result, It shows a tendency to increase the life.

However, simply improving the organic layer does not maximize efficiency. This is because long life and high efficiency can be achieved at the same time when the optimum combination of energy level and T1 value between each organic material layer and the intrinsic properties of materials (mobility, interfacial properties, etc.) is achieved.

In addition, in order to solve the light emission problem and the driving voltage problem in the hole transport layer in the recent organic electroluminescent device, a light emitting auxiliary layer must exist between the hole transport layer and the light emitting layer, and each light emitting layer (R, G, B) It is time to develop another light-emitting auxiliary layer.

In general, electrons are transferred from the electron transport layer to the light emitting layer, and holes are transferred from the hole transport layer to the light emitting layer to generate excitons by recombination.

However, in the case of the material used for the hole transport layer, since it has to have a low HOMO value, most have a low T1 value, which causes exciton generated in the light emitting layer to pass to the hole transport layer, resulting in the hole transport layer or at the hole transport layer interface. The light emission causes a decrease in color purity, efficiency and reduced life of the organic electric device.

In addition, although a driving voltage can be lowered by using a material having fast hole mobility, hole mobility is faster than electron mobility, resulting in charge unbalance in the light emitting layer, resulting in organic The color purity and efficiency of the electric device is lowered and the problem of shortening the life occurs.

Therefore, the development of a light-emitting auxiliary layer having a high T1 value and a HOMO level between the HOMO energy level of the hole transport layer and the HOMO energy level of the light-emitting layer is urgently required.

On the other hand, while delaying the diffusion of the metal oxide from the anode electrode (ITO), which is one of the causes of shortening the life of the organic electric device, into the organic layer, stable properties against Joule heating generated during device driving, that is, high glass transition There is a need to develop a hole injection layer material having a temperature. The low glass transition temperature of the hole transport layer material has a property of lowering the uniformity of the thin film surface when driving the device, which has been reported to have a great influence on the device life. In addition, the OLED device is mainly formed by a vapor deposition method, and it is necessary to develop a material that can withstand a long time during vapor deposition, that is, a material having strong heat resistance.

That is, in order to sufficiently exhibit the excellent characteristics of the organic electric device, materials constituting an organic material layer in the device, such as a hole injection material, a hole transport material, a light emitting material, an electron transport material, an electron injection material, a light emitting auxiliary layer material, are stable and efficient Although it should be preceded by the material, the development of a stable and efficient organic material layer material for an organic electric device has not been sufficiently achieved. Therefore, the development of new materials continues to be required, and in particular, the development of materials for the light-emitting auxiliary layer and the hole transport layer is urgently required.

An object of the present invention is to provide a compound capable of improving the device's high luminous efficiency, low driving voltage, high heat resistance, color purity and lifetime, and an organic electric device using the same and its electronic device.

In one aspect, the present invention provides a compound represented by the following formula.

In another aspect, the present invention provides an organic electric device using the compound represented by the formula and an electronic device thereof.

By using the compound according to the present invention, high luminous efficiency, low driving voltage, and high heat resistance of the device can be achieved, and color purity and lifetime of the device can be greatly improved.

1 is an exemplary view of an organic electroluminescent device according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known structures or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component, but another component between each component It will be understood that elements may be "connected", "coupled" or "connected".

As used in this specification and the appended claims, the meanings of the following terms are as follows, unless stated otherwise.

The term "halo" or "halogen" as used herein is fluorine (F), bromine (Br), chlorine (Cl) or iodine (I), unless otherwise noted.

The term "alkyl" or "alkyl group" used in the present invention has a single bond of 1 to 60 carbon atoms, unless otherwise specified, a straight chain alkyl group, branched chain alkyl group, cycloalkyl (alicyclic) group, alkyl-substituted cyclo By radicals of saturated aliphatic functional groups, including alkyl groups, cycloalkyl-substituted alkyl groups.

As used herein, the term "haloalkyl group" or "halogenalkyl group" means an alkyl group substituted with halogen, unless otherwise specified.

The term "heteroalkyl group" used in the present invention means that at least one of the carbon atoms constituting the alkyl group is replaced with a heteroatom.

The term "alkenyl group" or "alkynyl group" used in the present invention has a double or triple bond having 2 to 60 carbon atoms, and includes straight or branched chain groups, and is not limited thereto, unless otherwise specified. It is not.

As used herein, the term "cycloalkyl" means an alkyl forming a ring having 3 to 60 carbon atoms, unless otherwise specified, and is not limited thereto.

The term "alkoxyl group", "alkoxy group", or "alkyloxy group" used in the present invention means an alkyl group to which an oxygen radical is attached, and has a carbon number of 1 to 60 unless otherwise specified, and is limited thereto. It is not.

As used herein, the terms "alkenoxyl group", "alkenoxy group", "alkenyloxyl group", or "alkenyloxy group" means an alkenyl group to which an oxygen radical is attached, and 2 to 60 unless otherwise specified. It has a carbon number, and is not limited thereto.

The term "aryloxyl group" or "aryloxy group" used in the present invention means an aryl group to which an oxygen radical is attached, and has a carbon number of 6 to 60 unless otherwise specified, and is not limited thereto.

The terms "aryl group" and "arylene group" used in the present invention have 6 to 60 carbon atoms, respectively, and are not limited thereto unless otherwise specified. In the present invention, an aryl group or an arylene group means a single ring or multi-ring aromatic, and includes an aromatic ring formed by neighboring substituents participating in a bond or reaction. For example, the aryl group may be a phenyl group, biphenyl group, fluorene group, or spirofluorene group.

The prefix "aryl" or "ar" refers to a radical substituted with an aryl group. For example, an arylalkyl group is an alkyl group substituted with an aryl group, an arylalkenyl group is an alkenyl group substituted with an aryl group, and a radical substituted with an aryl group has a carbon number described herein.

Also, when the prefix is named in succession, it means that the substituents are listed in the order described first. For example, in the case of an arylalkoxy group, it means an alkoxy group substituted with an aryl group, in the case of an alkoxycarbonyl group, it means a carbonyl group substituted with an alkoxyl group, and in the case of an arylcarbonyl alkenyl group, it means an alkenyl group substituted with an arylcarbonyl group. Wherein the arylcarbonyl group is a carbonyl group substituted with an aryl group.

As used herein, the term "heteroalkyl" means alkyl containing one or more heteroatoms, unless otherwise noted. As used herein, the term "heteroaryl group" or "heteroarylene group" means an aryl group or an arylene group having 2 to 60 carbon atoms, each of which contains one or more heteroatoms, unless otherwise specified. No, it includes at least one of a single ring and multiple rings, and may be formed by combining adjacent functional devices.

The term "heterocyclic group" used in the present invention includes at least one heteroatom, has 2 to 60 carbon atoms, includes at least one of a single ring and multiple rings, heteroaliphatic ring and hetero, unless otherwise specified. Aromatic rings. Adjacent functional groups may also be formed by bonding.

As used herein, the term "heteroatom" refers to N, O, S, P or Si, unless stated otherwise.

In addition, "heterocyclic group" may include a ring containing SO ₂ instead of carbon forming a ring. For example, "heterocyclic group" includes the following compounds.

Unless otherwise stated, the term "aliphatic" as used herein means an aliphatic hydrocarbon having 1 to 60 carbon atoms, and "aliphatic ring" means an aliphatic hydrocarbon ring having 3 to 60 carbon atoms.

Unless otherwise specified, the term "ring" as used herein refers to a fused ring consisting of an aliphatic ring having 3 to 60 carbon atoms, an aromatic ring having 6 to 60 carbon atoms, a heterocycle having 2 to 60 carbon atoms, or a combination thereof, Saturated or unsaturated rings.

Other hetero compounds or hetero radicals other than the above-described hetero compounds include one or more hetero atoms, but are not limited thereto.

Unless otherwise specified, the term "carbonyl" used in the present invention is represented by -COR', where R'is hydrogen, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, 3 to 30 carbon atoms. Is a cycloalkyl group, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, or a combination thereof.

Unless otherwise specified, the term "ether" used in the present invention is represented by -RO-R', wherein R or R'are each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, or 6 to 30 carbon atoms. It is an aryl group, a cycloalkyl group having 3 to 30 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group having 2 to 20 carbon atoms, or a combination thereof.

Also, unless expressly stated, the term "substituted" in the term "substituted or unsubstituted" as used in the present invention is deuterium, halogen, amino group, nitrile group, nitro group, C ₁ ~ C ₂₀ alkyl group, C ₁ ~ C ₂₀ alkoxyl group, C ₁ ~ C ₂₀ alkylamine group, C ₁ ~ C ₂₀ alkylthiophene group, C ₆ ~ C ₂₀ arylthiophene group, C ₂ ~ C ₂₀ alkenyl group, C ₂ ~ C ₂₀ alkynyl, C ₃ ~ C ₂₀ cycloalkyl group, C ₆ ~ C ₂₀ aryl group, of a C ₆ ~ C ₂₀ substituted by deuterium aryl group, a C ₈ ~ C ₂₀ aryl alkenyl group, a silane group, a boron Means a group, a germanium group, and one or more substituents selected from the group consisting of C ₂ to C ₂₀ heterocyclic groups, and is not limited to these substituents.

In addition, unless expressly stated, the formula used in the present invention is applied in the same manner as the definition of a substituent based on the index definition of the following formula.

Here, when a is an integer of 0, the substituent R ¹ is absent, when a is an integer of 1, one substituent R ¹ is bound to any one of carbons forming a benzene ring, and when a is an integer of 2 or 3 Each of them is bonded as follows, wherein R ¹ may be the same or different from each other, and when a is an integer of 4 to 6, it binds to the carbon of the benzene ring in a similar manner, while indicating the hydrogen bound to the carbon forming the benzene ring. Is omitted.

1 is an exemplary view of an organic electric device according to an embodiment of the present invention.

Referring to FIG. 1, the organic electric device 100 according to the present invention includes a first electrode 120, a second electrode 180 and a first electrode 110 and a second electrode 180 formed on the substrate 110. ) Between the organic material layer comprising the compound according to the present invention. At this time, the first electrode 120 may be an anode (anode), the second electrode 180 may be a cathode (cathode), and in the case of an inverted type, the first electrode may be a cathode and the second electrode may be an anode.

The organic material layer may sequentially include a hole injection layer 130, a hole transport layer 140, a light emitting layer 150, an electron transport layer 160 and an electron injection layer 170 on the first electrode 120. At this time, layers other than the emission layer 150 may not be formed. A hole blocking layer, an electron blocking layer, a light emitting auxiliary layer 151, a buffer layer 141, and the like may be further included, and the electron transport layer 160, etc. may also serve as a hole blocking layer.

In addition, although not shown, the organic electric device according to the present invention may further include a protective layer or a light efficiency improving layer (Capping layer) formed on one surface opposite to the organic material layer among at least one surface of the first electrode and the second electrode.

The compound according to the present invention applied to the organic material layer is a host or dopant or light efficiency improving layer of the hole injection layer 130, the hole transport layer 140, the electron transport layer 160, the electron injection layer 170, and the light emitting layer 150 It could be used as a material. Preferably, the compound of the present invention may be used as the light emitting layer 150, the hole transport layer 140 and/or the light emitting auxiliary layer 151.

On the other hand, even in the same core, the band gap, electrical properties, and interfacial properties may vary depending on which substituent is attached to which position, so the selection of the core and the combination of sub-substituents coupled thereto are also very good. It is important, especially when the energy level and T1 value between each organic material layer and the intrinsic properties of materials (mobility, interfacial properties, etc.) are optimally combined, long life and high efficiency can be achieved simultaneously.

As described above, in order to solve the light emission problem in the hole transport layer in the recent organic electroluminescent device, it is preferable to form a light-emitting auxiliary layer between the hole transport layer and the light-emitting layer, depending on the respective light-emitting layers (R, G, B) It is time to develop different light-emitting auxiliary layers. On the other hand, in the case of the light-emitting auxiliary layer, since it is necessary to grasp the relationship between the hole transport layer and the light-emitting layer (host), even if a similar core is used, it will be very difficult to infer the characteristics of the organic layer used.

Therefore, in the present invention, by forming a light-emitting layer or a light-emitting auxiliary layer using the compound represented by Chemical Formula 1, the energy level (level) and T1 value between each organic material layer, the intrinsic properties (mobility, interface properties, etc.) of the material are optimized and organic It is possible to simultaneously improve the lifespan and efficiency of the electric device.

The organic electroluminescent device according to an embodiment of the present invention may be manufactured using a physical vapor deposition (PVD) method. For example, an anode 120 is formed by depositing a metal or a conductive metal oxide or an alloy thereof on a substrate, and a hole injection layer 130, a hole transport layer 140, a light emitting layer 150, and an electron transport layer are formed thereon. 160) and after forming an organic material layer including the electron injection layer 170, it can be prepared by depositing a material that can be used as the cathode 180 thereon.

In addition, the organic material layer is a solution process or a solvent process that is not a deposition method using various polymer materials, such as a spin coating process, a nozzle printing process, an inkjet printing process, a slot coating process, a dip coating process, a roll-to-roll process, a doctor blade It can be produced with fewer layers by a method such as a ding process, a screen printing process, or a thermal transfer method. Since the organic material layer according to the present invention can be formed in various ways, the scope of the present invention is not limited by the formation method.

The organic electric device according to the present invention may be a front emission type, a back emission type, or a double-sided emission type depending on the material used.

WOLED (White Organic Light Emitting Device) has the advantage of being easy to realize high resolution and having excellent processability, and can be manufactured using the color filter technology of the existing LCD. Various structures for white organic light emitting devices mainly used as backlight devices have been proposed and patented. Typically, R (Red), G (Green), B (Blue) light-emitting parts are arranged in a mutually planar side-by-side manner, and a stacking method in which R, G, and B light-emitting layers are stacked vertically. There is a color conversion material (CCM) method using electroluminescence by the blue (B) organic light-emitting layer and photo-luminescence of an inorganic phosphor using light therefrom. May be applied to such WOLED.

In addition, the organic electric device according to the present invention may be one of an organic electroluminescent device (OLED), an organic solar cell, an organic photoreceptor (OPC), an organic transistor (organic TFT), a monochromatic or white lighting device.

Another embodiment of the present invention may include an electronic device including a display device including the above-described organic electric element of the present invention, and a control unit for controlling the display device. At this time, the electronic device may be a current or future wired or wireless communication terminal, and includes all electronic devices such as mobile communication terminals such as mobile phones, PDAs, electronic dictionaries, PMPs, remote controls, navigation, game machines, various TVs, and various computers.

Hereinafter, a compound according to an aspect of the present invention will be described.

The compound according to an aspect of the present invention is represented by the following formula (1).

<Formula 1>

In Chemical Formula 1,

Ar ¹ to Ar ⁴ are iii) independently of each other C ₆ ~ C ₆₀ aryl group; Fluorenyl group; C ₂ ~ C ₆₀ heterocyclic group containing at least one heteroatom of O, N, S, Si and P; C ₃ ~ C ₆₀ aliphatic ring and C ₆ ~ C ₆₀ aromatic ring fused ring group; C ₁ ~ C ₅₀ alkyl group; C ₂ ~ C ₂₀ alkenyl group; C ₂ ~ C ₂₀ alkynyl group; C ₁ ~C ₃₀ Alkoxy group; C ₆ ~ C ₃₀ Aryloxy group; And -L'-N (R ') ( R ");. Selected from the group consisting of or, or ⅱ) a Ar ¹ and Ar ² may bond to one another to form a ring specifically, Ar ¹ to Ar ⁴ is phenyl , Biphenyl, naphthyl, fluorene, pyridine, pyrimidine, carbazole, benzothiophene, and the like.

a and d are each independently an integer of 0 to 4, and b and c are each independently an integer of 0 to 3.

R ¹ to R ⁴ are iii) independently of each other deuterium; halogen; C ₆ ~ C ₆₀ Aryl group; Fluorenyl group; C ₂ ~ C ₆₀ heterocyclic group containing at least one heteroatom of O, N, S, Si and P; C ₃ ~ C ₆₀ aliphatic ring and C ₆ ~ C ₆₀ aromatic ring fused ring group; C ₁ ~ C ₅₀ alkyl group; C ₂ ~ C ₂₀ alkenyl group; C ₂ ~ C ₂₀ alkynyl group; C ₁ ~C ₃₀ Alkoxy group; C ₆ ~ C ₃₀ Aryloxy group; And -L'-N(R')(R"); or ii) adjacent groups may combine with each other to form a ring.

Here, the ring means an aliphatic ring having 3 to 60 carbon atoms, an aromatic ring having 6 to 60 carbon atoms, or a fused ring composed of a heterocycle having 2 to 60 carbon atoms or a combination thereof, and includes a saturated or unsaturated ring.

L'is a single bond; C ₆ ~ C ₆₀ Arylene group; Fluorylene group; C ₃ ~ C ₆₀ aliphatic ring and C ₆ ~ C ₆₀ aromatic ring fused ring group; And C ₂ ~ C ₆₀ heterocyclic group; is selected from the group consisting of.

R'and R" are independently of each other C ₆ ~ C ₆₀ aryl group; fluorenyl group; C ₃ ~ C ₆₀ aliphatic ring and C ₆ ~ C ₆₀ aromatic ring fused ring group; And O, N, C ₂ ~ C ₆₀ heterocyclic group containing at least one heteroatom of S, Si and P; is selected from the group consisting of.

Here, when the aryl group, fluorenyl group, heterocyclic group, fused ring group, alkyl group, alkenyl group, alkynyl group, alkoxyl group, aryloxy group, arylene group, fluorenylene group is further substituted with one or more substituents, respectively heavy hydrogen; halogen; Silane group; Siloxane groups; Boron group; Germanium group; Cyano group; Nitro group; -L'-N(R')(R"); C ₁ ~ C ₂₀ alkylthio; C ₁ ~ C ₂₀ alkoxyl group; C ₁ ~ C ₂₀ alkyl group; C ₂ ~ C ₂₀ alkenyl group; C ₂ ~ C ₂₀ alkynyl group; C ₆ ~ C ₂₀ Aryl group; C ₆ ~ C ₂₀ aryl group substituted with deuterium; Fluorenyl group; C ₂ ~ C ₂₀ heterocyclic group; C ₃ ~ C ₂₀ cycloalkyl group; C ₇ ~ C ₂₀ arylalkyl group and C ₈ ~ C ₂₀ aryl alkenyl group may be further substituted with one or more substituents selected from the group consisting of.

Specifically, the compound represented by Formula 1 may be represented by Formula 2 or Formula 3 below.

<Formula 2> <Formula 3>

In Formulas 2 and 3, Ar ¹ to Ar ⁴ , R ¹ to R ⁴ , a, b, c and d are defined as defined in Formula 1 above.

More specifically, the compound represented by Formula 1 to Formula 3 may be any one of the following compounds.

As another embodiment, the present invention provides a compound for an organic electric device represented by the formula (1).

In another embodiment, the present invention provides an organic electric device containing the compound represented by Formula 1 above.

At this time, the organic electric device includes a first electrode; A second electrode; And an organic material layer positioned between the first electrode and the second electrode. The organic material layer may include a compound represented by Chemical Formula 1, and Chemical Formula 1 is a hole injection layer, a hole transport layer, and a light-emitting auxiliary layer of the organic material layer. Or it may be contained in at least one of the light emitting layer. That is, the compound represented by Chemical Formula 1 may be used as a material for a hole injection layer, a hole transport layer, a light emitting auxiliary layer, or a light emitting layer. Specifically, an organic electroluminescent device comprising one of the compounds represented by Chemical Formulas 2 to 8 is provided in an organic material layer, and more specifically, the present invention provides an organic electroluminescent device comprising the compound represented by the individual chemical formula in the organic material layer. Provides

In another embodiment of the present invention, the present invention is a light efficiency improving layer formed on at least one side of the one side of the first electrode opposite to the organic layer or one side of the second electrode opposite to the organic layer. It provides an organic electrical device further comprising a.

Hereinafter, examples of the synthesis of the compound represented by the chemical formula according to the present invention and the manufacturing example of the organic electric device will be specifically described with reference to examples, but the present invention is not limited to the following examples.

Synthetic example

The compound (Final Product) according to the present invention is prepared by reacting Sub 1 and Sub 2 as shown in Reaction Scheme 1 below, but is not limited thereto.

<Scheme 1>

Ⅰ. Sub Synthesis of 1

Sub 1 of Scheme 1 may be synthesized by the following Reaction Scheme 2, but is not limited thereto.

<Reaction Scheme 2>

(One) Sub 1-3 synthesis

Round bottom flask with Sub 1-1 (1 eq), Sub 1-2 (1 eq), Pd ₂ (dba) ₃ (0.05 eq), PPh ₃ (0.1 eq), NaO t -Bu (3 eq), toluene (10.5mL / sub1-1 1mmol) was added, and the reaction proceeded at 100°C. After the reaction was completed, the mixture was extracted with ether and water, and the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain Sub 1-3.

(2) Sub 1-4 synthesis

Sub 1-3 (1 eq) was dissolved in anhydrous Ether, the temperature of the reactant was lowered to -78°C, n-BuLi (2.5M in hexane) (1.1 eq) was slowly added dropwise, and the reaction was stirred for 30 minutes. Ordered. After that, the temperature of the reactant was again lowered to -78°C and Triisopropylborate (1.5 eq) was added dropwise. After stirring at room temperature, dilute it with water and add 2N HCl. After the reaction was completed, extraction was performed with ethyl acetate and water, and the organic layer was dried over MgSO ₄ and concentrated, and then the resulting organic material was silicagel column and recrystallized to obtain Sub 1-4.

(3) Sub 1-6 synthesis

Put Sub 1-4 (1 eq) in the round bottom flask, Sub 1-5 (1 eq), Pd(PPh ₃ ) ₄ (0.03 eq), NaOH (3 eq), THF (3mL / 1mmol), water ( 1.5mL / 1mmol). Then, the mixture was heated to reflux at 80°C to 90°C. When the reaction is complete, dilute it with distilled water at room temperature and extract with methylene chloride and water. The organic layer was dried and concentrated with MgSO ₄ , and then the resulting compound was silicagel column and recrystallized to obtain Sub 1-6.

(4) Sub 1 synthesis

Put Sub 1-6 (1 eq) in the round bottom flask, Sub 1-7 (1 eq), Pd(PPh ₃ ) ₄ (0.03 eq), NaOH (3 eq), THF (3mL / 1mmol), water ( 1.5mL / 1mmol). Then, the mixture was heated to reflux at 80°C to 90°C. When the reaction is complete, dilute it with distilled water at room temperature and extract with methylene chloride and water. The organic layer was dried and concentrated with MgSO ₄ , and then the resulting compound was silicagel column and recrystallized to obtain Sub 1.

One. Sub Synthesis of 1(1)

(One) Sub 1-3-1 synthesis

Round bottom flask with Sub 1-1-1 (4.9g, 20mmol), Sub 1-2-1 (4.1g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol) ), NaO t -Bu (5.8 g, 60 mmol), toluene (210 mL) was added, and then the reaction proceeded at 100°C. After the reaction was completed, the mixture was extracted with ether and water, and the organic layer was dried over MgSO ₄ and concentrated. The resulting organic material was silicagel column and recrystallized to obtain 5.4 g of Sub 1-3-1 (yield: 84%).

(2) Sub 1-4-1 synthesis

Sub 1-3-1 (6.4g, 20mmol) was dissolved in anhydrous Ether, the temperature of the reactant was lowered to -78°C, and n-BuLi (2.5M in hexane) (1.4g, 22mmol) was slowly added dropwise. The reaction was stirred for 30 minutes. After that, the temperature of the reactant was again lowered to -78°C, and Triisopropyl borate (5.6g, 30mmol) was added dropwise. After stirring at room temperature, dilute it with water and add 2N HCl. After the reaction was completed, the mixture was extracted with ethyl acetate and water, and the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain 4.5 g of Sub 1-4-1 (yield: 78%).

(3) Sub 1-6-1 synthesis

Sub 1-4-1 (5.7g, 20mmol) was added to the round bottom flask, Sub 1-5-1 (6.3g, 20mmol), Pd(PPh ₃ ) ₄ (0.7g, 0.6mmol), NaOH (2.4g , 60mmol), THF (60mL), and water (30mL). Then, the mixture was heated to reflux at 80°C to 90°C. When the reaction is complete, dilute it with distilled water at room temperature and extract with methylene chloride and water. After drying and concentrating the organic layer with MgSO ₄ , the resulting compound was silicagel column and recrystallized to obtain 6.8 g of Sub 1-6-1 (yield: 71%).

(4) Sub 1(1) synthesis

Sub 1-6-1 (9.5g, 20mmol) is added to the round bottom flask, Sub 1-7-1 (5.7g, 20mmol), Pd(PPh ₃ ) ₄ (0.7g, 0.6mmol), NaOH (2.4g , 60mmol), THF (60mL), and water (30mL). Then, the mixture was heated to reflux at 80°C to 90°C. When the reaction is complete, dilute it with distilled water at room temperature and extract with methylene chloride and water. The organic layer was dried and concentrated with MgSO ₄ , and the resulting compound was silicagel column and recrystallized to obtain Sub 1(1) 8.7g (yield: 68%).

2. Sub Synthesis of 1(7)

Sub 1-6-1 (9.5g, 20mmol) is added to the round bottom flask, Sub 1-7-2 (7.9g, 20mmol), Pd(PPh ₃ ) ₄ (0.7g, 0.6mmol), NaOH (2.4g , 60mmol), THF (60mL), and water (30mL). Then, the mixture was heated to reflux at 80°C to 90°C. When the reaction is complete, dilute it with distilled water at room temperature and extract with methylene chloride and water. After drying and concentrating the organic layer with MgSO ₄ , the resulting compound was silicagel column and recrystallized to obtain Sub 1(7) 9.8g (yield: 66%).

3. Sub Synthesis of 1(10)

Sub 1-6-1 (9.5g, 20mmol) is added to the round bottom flask, Sub 1-7-3 (6.7g, 20mmol), Pd(PPh ₃ ) ₄ (0.7g, 0.6mmol), NaOH (2.4g , 60mmol), THF (60mL), and water (30mL). Then, the mixture was heated to reflux at 80°C to 90°C. When the reaction is complete, dilute it with distilled water at room temperature and extract with methylene chloride and water. After drying and concentrating the organic layer with MgSO ₄ , the resulting compound was silicagel column and recrystallized to obtain Sub 1(10) 9.0g (yield: 65%).

Meanwhile, examples of Sub 1 are as follows, but are not limited thereto, and their FD-MS are shown in Table 1 below.

[Table 1]

Ⅱ. Sub Synthesis of 2

Sub 2 of Reaction Scheme 1 may be synthesized by the reaction route of Reaction Scheme 3 below, but is not limited thereto.

<Scheme 3>

Round bottom flask Sub 2-1 (1 eq), Sub 2-2 (1 eq), Pd ₂ (dba) ₃ (0.05 eq), PPh ₃ (0.1 eq), NaO t -Bu (3 eq), toluene (10.5mL / sub1-1 1mmol) was added, and the reaction proceeded at 100°C. After the reaction was completed, the mixture was extracted with ether and water, and the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain Sub 2.

One. Sub Synthesis of 2-9

Round bottom flask Sub 2-1-1 (1.9g, 20mmol), Sub 2-2-1 (5.5g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol) ), NaO t -Bu (5.8 g, 60 mmol), toluene (210 mL) were added, respectively, and the mixture was stirred and refluxed at 100° C. for 24 hours. After extraction with ether and water, the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain 5.2 g of Sub 2-9 (yield: 64%).

2. Sub Synthesis of 2-14

Round bottom flask Sub 2-1-2 (1.9g, 20mmol), Sub 2-2-2 (4.1g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol) ), NaO t -Bu (5.8 g, 60 mmol), toluene (210 mL) were added, respectively, and the mixture was stirred and refluxed at 100° C. for 24 hours. After extraction with ether and water, the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain 2.6 g of Sub 2-14 (yield: 60%).

3. Sub Synthesis of 2-28

Round bottom flask Sub 2-1-3 (3.4g, 20mmol), Sub 2-2-3 (4.7g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol) ), NaO t -Bu (5.8 g, 60 mmol), toluene (210 mL) were added, respectively, and the mixture was stirred and refluxed at 100° C. for 24 hours. After extraction with ether and water, the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain 4.2 g of Sub 2-28 (yield: 65%).

Meanwhile, examples of Sub 2 are as follows, but are not limited thereto, and their FD-MS are shown in Table 2 below.

[Table 2]

Ⅲ. Final product( Final Product Synthesis of)

In a round bottom flask, Sub 1 (1 eq), Sub 2 (1 eq), Pd ₂ (dba) ₃ (0.05 eq), PPh ₃ (0.1 eq), NaO t -Bu (3 eq), toluene (10.5 mL / After adding sub1-1 1mmol), the reaction was allowed to proceed at 100°C. After the reaction was completed, the mixture was extracted with ether and water, and the organic layer was dried over MgSO ₄ and concentrated, and then the resulting organic material was silicagel column and recrystallized to obtain a final product.

1. Synthesis of 1-34

Round bottom flask with Sub 1(1) (12.8g, 20mmol), Sub 2-28 (6.4g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol), NaO After adding t- Bu (5.8 g, 60 mmol) and toluene (210 mL), the mixture was stirred and refluxed at 100° C. for 24 hours. After extraction with ether and water, the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain 13.0 g of 1-34 (yield: 74%).

2. Synthesis of 1-40

Round bottom flask with Sub 1(1) (12.8g, 20mmol), Sub 2-32 (7.2g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol), NaO After adding t- Bu (5.8 g, 60 mmol) and toluene (210 mL), the mixture was stirred and refluxed at 100° C. for 24 hours. After extraction with ether and water, the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain 13.8 g of 1-40 (yield: 75%).

3. Synthesis of 1-49

Round bottom flask Sub 1(9) (13.8g, 20mmol), Sub 2-1 (3.4g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol), NaO After adding t- Bu (5.8 g, 60 mmol) and toluene (210 mL), the mixture was stirred and refluxed at 100° C. for 24 hours. After extraction with ether and water, the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain 11.8 g of 1-49 (yield: 76%).

4. Synthesis of 1-61

Round bottom flask Sub 1(1) (12.8g, 20mmol), Sub 2-51 (3.3g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol), NaO After adding t- Bu (5.8 g, 60 mmol) and toluene (210 mL), the mixture was stirred and refluxed at 100° C. for 24 hours. After extraction with ether and water, the organic layer was dried over MgSO ₄ and concentrated, and then the resulting organic material was silicagel column and recrystallized to obtain 10.6 g of 1-61 (yield: 73%).

5. Synthesis of 2-7

Round bottom flask with Sub 1(2) (12.8g, 20mmol), Sub 2-52 (6.5g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol), NaO After adding t- Bu (5.8 g, 60 mmol) and toluene (210 mL), the mixture was stirred and refluxed at 100° C. for 24 hours. After extraction with ether and water, the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain 22.3 12.3g (yield: 70%).

6. Synthesis of 2-34

Round bottom flask with Sub 1(2) (12.8g, 20mmol), Sub 2-28 (6.4g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol), NaO After adding t- Bu (5.8 g, 60 mmol) and toluene (210 mL), the mixture was stirred and refluxed at 100° C. for 24 hours. After extraction with ether and water, the organic layer was dried over MgSO ₄ and concentrated, and the resulting organic material was silicagel column and recrystallized to obtain 13.4 g of 2-34 (yield: 76%).

7. Synthesis of 2-61

Round bottom flask Sub 1(2) (12.8g, 20mmol), Sub 2-51 (3.3g, 20mmol), Pd ₂ (dba) ₃ (0.9g, 1mmol), PPh ₃ (0.5g, 2mmol), NaO After adding t- Bu (5.8 g, 60 mmol) and toluene (210 mL), the mixture was stirred and refluxed at 100° C. for 24 hours. After extraction with ether and water, the organic layer was dried over MgSO ₄ and concentrated, and then the resulting organic material was silicagel column and recrystallized to obtain 2-61 10.5 g (yield: 72%).

On the other hand, the FD-MS values of the compounds 1-1 to 1-68 and 2-1 to 2-68 of the present invention prepared according to the above synthesis examples are shown in Table 3 below.

[Table 3]

Manufacturing evaluation of organic electric devices

[ Example 1] Green organic electroluminescent device ( Hole transport layer )

An organic electroluminescent device was manufactured according to a conventional method using the compound of the present invention as a hole transport layer material. First, N ¹ -(naphthalen-2-yl)-N ⁴ ,N ⁴ -bis(4-(naphthalen-2-yl(phenyl)amino)phenyl)-N ¹ on the ITO layer (anode) formed on the organic substrate After forming a hole injection layer by vacuum depositing -phenylbenzene-1,4-diamine (hereinafter abbreviated as "2-TNATA") to a thickness of 60 nm, the compound 1-1 of the present invention is 60 nm thick on the hole injection layer. Vacuum-deposited to form a hole transport layer. Subsequently, 4,4'-N,N'-dicarbazole-biphenyl (hereinafter abbreviated as "CBP") on the hole transport layer as a host, tris(2-phenylpyridine)-iridium (hereinafter "Ir(ppy) ₃ " And abbreviated as) as a dopant, doped at a weight ratio of 90:10, and vacuum-deposited to a thickness of 30 nm to form a light emitting layer. Subsequently, (1,1'bisphenyl)-4-oleito)bis(2-methyl-8-quinolineoleito)aluminum (hereinafter abbreviated as "BAlq") on the light emitting layer was vacuum deposited to a thickness of 10 nm to form a hole. A blocking layer was formed, and an electron transport layer was formed by vacuum-depositing tris(8-quinolinol)aluminum (hereinafter abbreviated as "Alq ₃ ") on the hole blocking layer to a thickness of 40 nm. Subsequently, an organic electroluminescent device was manufactured by depositing LiF, a halogenated alkali metal, to a thickness of 0.2 nm to form an electron injection layer, and then depositing Al to a thickness of 150 nm to form a cathode.

[ Example 2] to [ Example 14] Green organic electroluminescent device ( Hole transport layer )

Instead of the compound 1-1 of the present invention as a hole transport layer material, the compounds 1-2~1-4, 1-34, 1-35, 1-40, 2-1~2-4, 2 of the present invention shown in Table 4 below An organic electroluminescent device was manufactured in the same manner as in Example 1, except that -34, 2-35, and 2-40 were used.

[ Comparative example One]

An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the following Comparative Compound A was used instead of Compound 1-1 of the present invention as the hole transport layer material.

<Comparative Compound A>

[ Comparative example 2]

An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the following Comparative Compound B was used instead of Compound 1-1 of the present invention as the hole transport layer material.

<Comparative Compound B>

[ Comparative example 3]

An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the following Comparative Compound C was used instead of Compound 1-1 of the present invention as the hole transport layer material.

<Comparative Compound C>

Electroluminescence (EL) characteristics with PR-650 of photoresearch by applying a net bias DC voltage to the organic electroluminescent elements manufactured by Examples 1 to 14 and Comparative Examples 1 to 3 of the present invention Was measured, and T95 life was measured through a life measurement equipment manufactured by Max Science at a luminance of 5000 cd/m 2. The measurement results are shown in Table 4 below.

[Table 4]

As can be seen from the results in Table 4, the organic electroluminescent device using the compound of the present invention as a material for the hole transport layer is compared with the organic electroluminescent device using comparative compounds A to C as the material for the hole transport layer, driving voltage, luminous efficiency and Lifespan was significantly improved.

That is, the device using the compound of the present invention and the comparative compound C having two carbazoles as a hole transport layer material, rather than the device using the comparative compound B with NPB as a material for the hole transport layer, and the comparative compound A with one carbazole. It showed excellent results in terms of driving voltage, efficiency and life. In addition, two carbazoles are connected to the 2nd, 3rd or 2nd or 2nd positions respectively through the linker at the 2nd, 3rd, or 2nd position than the device using Comparative Compound C as the hole transport layer material, each of which is connected through a linker at the 3rd position. The device using the connected compound of the present invention as a material for the hole transport layer has similar efficiency and lifetime, but has a lower driving voltage. This suggests that the properties of the compound vary significantly depending on the number of linkages of carbazole, the position of the linkage, or the type of other substituents, and that the properties of the device to which these compounds are applied can be significantly changed.

[ Example 15] Red organic electroluminescent device ( Light emitting auxiliary layer )

An organic electroluminescent device was manufactured according to a conventional method using the compound of the present invention as a light-emitting auxiliary layer material. First, after forming a hole injection layer by vacuum deposition of 2-TNATA to a thickness of 60 nm on an ITO layer (anode) formed on an organic substrate, 4,4-bis[N-(1-naphthyl) on the hole injection layer )-N-phenylamino]biphenyl (hereinafter abbreviated as “NPD”) was vacuum-deposited to a thickness of 60 nm to form a hole transport layer. Subsequently, a compound 1-1 of the present invention was vacuum-deposited to a thickness of 20 nm on the hole transport layer to form a light-emitting auxiliary layer, and CBP as a host on the light-emitting auxiliary layer, bis-(1-phenylisoquinolyl)iridium(III) Doping with acetylacetonate (hereinafter abbreviated as “(piq) ₂ Ir(acac)”) as a dopant was doped at a weight ratio of 95:5 to form a light emitting layer by vacuum deposition to a thickness of 30 nm. Subsequently, a hole blocking layer was formed by vacuum-depositing BAlq to a thickness of 10 nm on the light emitting layer, and an electron transport layer was formed by vacuum depositing Alq ₃ on the hole blocking layer to a thickness of 40 nm. Subsequently, an organic electroluminescent device was manufactured by depositing LiF, a halogenated alkali metal, to a thickness of 0.2 nm to form an electron injection layer, and then depositing Al to a thickness of 150 nm to form a cathode.

[ Example 16] to [ Example 150] Red Organic Electroluminescent Device ( Light emitting auxiliary layer )

The same as in Example 15, except that the compounds 1-2-1 to 68 and 2-1 to 2-68 of the present invention shown in Table 5 below were used instead of the compound 1-1 of the present invention as the light-emitting auxiliary layer material An organic electroluminescent device was manufactured by the method.

[ Comparative example 4]

An organic electroluminescent device was manufactured in the same manner as in Example 15, except that the auxiliary light emitting layer was not formed.

[ Comparative example 5]

An organic electroluminescent device was manufactured in the same manner as in Example 15, except that Comparative Compound A was used instead of Compound 1-1 of the present invention as a light-emitting auxiliary layer material.

[ Comparative example 6]

An organic electroluminescent device was manufactured in the same manner as in Example 15, except that Comparative Compound B was used instead of Compound 1-1 of the present invention as a light-emitting auxiliary layer material.

[ Comparative example 7]

An organic electroluminescent device was manufactured in the same manner as in Example 15, except that Comparative Compound C was used instead of Compound 1-1 of the present invention as a light-emitting auxiliary layer material.

Electroluminescence (EL) characteristics with PR-650 of photoresearch by applying a net bias DC voltage to the organic electroluminescent elements manufactured by Examples 15 to 150 and Comparative Examples 4 to 7 of the present invention Was measured, and T95 life was measured through a life measurement equipment manufactured by Max Science at a reference luminance of 2500 cd/m 2. The measurement results are shown in Table 5 below.

[Table 5]

[ Example 151] Green organic electroluminescent device ( Light emitting auxiliary layer )

An organic electroluminescent device was manufactured according to a conventional method using the compound of the present invention as a light-emitting auxiliary layer material. First, a hole injection layer was formed by vacuum-depositing 2-TNATA to a thickness of 60 nm on an ITO layer (anode) formed on an organic substrate, and then vacuum deposition of NPD on the hole injection layer to a thickness of 60 nm to form a hole transport layer. . Subsequently, a compound 1-1 of the present invention was vacuum-deposited to a thickness of 20 nm on the hole transport layer to form a light-emitting auxiliary layer, and CBP as a host and Ir(ppy) ₃ as a dopant on the light-emitting auxiliary layer 95: Doped at a weight ratio of 5 to form a light emitting layer by vacuum deposition to a thickness of 30nm. Subsequently, a hole blocking layer was formed by vacuum-depositing BAlq to a thickness of 10 nm on the light emitting layer, and an electron transport layer was formed by vacuum depositing Alq ₃ on the hole blocking layer to a thickness of 40 nm. Subsequently, an organic electroluminescent device was manufactured by depositing LiF, a halogenated alkali metal, to a thickness of 0.2 nm to form an electron injection layer, and then depositing Al to a thickness of 150 nm to form a cathode.

[ Example 152] to [ Example 286] Green organic electroluminescent device ( Light emitting auxiliary layer )

The same as in Example 151, except that Compounds 1-2 to 1-68 and 2-1 to 2-68 of the present invention listed in Table 6 below were used instead of Compound 1-1 of the present invention as a light-emitting auxiliary layer material. An organic electroluminescent device was manufactured by the method.

[ Comparative example 8]

An organic electroluminescent device was manufactured in the same manner as in Example 151, except that the auxiliary light emitting layer was not formed.

[ Comparative example 9]

An organic electroluminescent device was manufactured in the same manner as in Example 151, except that Comparative Compound A was used instead of Compound 1-1 of the present invention as a light-emitting auxiliary layer material.

[ Comparative example 10]

An organic electroluminescent device was manufactured in the same manner as in Example 151, except that Comparative Compound B was used instead of Compound 1-1 of the present invention as a light emitting auxiliary layer material.

[ Comparative example 11]

An organic electroluminescent device was manufactured in the same manner as in Example 151, except that Comparative Compound C was used instead of Compound 1-1 of the present invention as a light emitting auxiliary layer material.

Electroluminescence (EL) characteristics with PR-650 of photoresearch by applying a net bias DC voltage to the organic electroluminescent elements prepared in Examples 151 to 286 and Comparative Examples 8 to 11 of the present invention Was measured, and the T95 life was measured by a life measurement equipment manufactured by Max Science at a luminance of 5000 cd/m 2. The measurement results are shown in Table 6 below.

[Table 6]

[ Example 287] Blue organic electroluminescent device ( Light emitting auxiliary layer )

An organic electroluminescent device was manufactured according to a conventional method using the compound of the present invention as a light-emitting auxiliary layer material. First, a hole injection layer was formed by vacuum-depositing 2-TNATA to a thickness of 60 nm on an ITO layer (anode) formed on an organic substrate, and then vacuum deposition of NPD on the hole injection layer to a thickness of 60 nm to form a hole transport layer. . Subsequently, a compound 1-1 of the present invention was vacuum-deposited to a thickness of 20 nm on the hole transport layer to form a light-emitting auxiliary layer, and 9,10-di(naphthalen-2-yl)anthracene as a host was formed on the light-emitting auxiliary layer. , BD-052X (manufactured by Idemitsukosan) was doped at a weight ratio of 93:7 as a dopant, and vacuum-deposited to a thickness of 30 nm to form a light emitting layer. Subsequently, a hole blocking layer was formed by vacuum-depositing BAlq to a thickness of 10 nm on the light emitting layer, and an electron transport layer was formed by vacuum depositing Alq ₃ on the hole blocking layer to a thickness of 40 nm. Subsequently, an organic electroluminescent device was manufactured by depositing LiF, a halogenated alkali metal, to a thickness of 0.2 nm to form an electron injection layer, and then depositing Al to a thickness of 150 nm to form a cathode.

[ Example 288] to [ Example 422] Blue Organic Electroluminescent Device ( Light emitting auxiliary layer )

The same as in Example 287, except that Compound 1-2-1 to 68 and 2-1 to 2-68 of the present invention described in Table 7 below were used instead of Compound 1-1 of the present invention as a light-emitting auxiliary layer material. An organic electroluminescent device was manufactured by the method.

[ Comparative example 12]

An organic electroluminescent device was manufactured in the same manner as in Example 287, except that the auxiliary light emitting layer was not formed.

[ Comparative example 13]

An organic electroluminescent device was manufactured in the same manner as in Example 287, except that Comparative Compound A was used instead of Compound 1-1 of the present invention as a light emitting auxiliary layer material.

[ Comparative example 14]

An organic electroluminescent device was manufactured in the same manner as in Example 287, except that Comparative Compound B was used instead of Compound 1-1 of the present invention as a light-emitting auxiliary layer material.

[ Comparative example 15]

An organic electroluminescent device was manufactured in the same manner as in Example 287, except that Comparative Compound C was used instead of Compound 1-1 of the present invention as a light-emitting auxiliary layer material.

Electroluminescence (EL) characteristics with PR-650 of photoresearch by applying a direct bias DC voltage to the organic electroluminescent elements prepared in Examples 287 to 422 and Comparative Examples 12 to 15 of the present invention Was measured, and T95 life was measured by a life measurement equipment manufactured by Max Science at a luminance of 500 cd/m 2. The measurement results are shown in Table 7 below.

[Table 7]

As can be seen from the results of Table 5, Table 6, and Table 7, the organic electroluminescent device using the compound of the present invention as a material for the light-emitting auxiliary layer is compared with the organic electroluminescent device that does not form a light-emitting auxiliary layer Comparative compounds A to C Compared to the organic electroluminescent device used as a material for the light-emitting auxiliary layer, the driving voltage, luminous efficiency and lifespan were significantly improved.

That is, it can be seen that the devices using the compounds of the present invention as the material of the light-emitting auxiliary layer have improved luminous efficiency and lifespan compared to the devices without the light-emitting auxiliary layer, and also the comparative compounds A and B It was confirmed that the device using the compound of the present invention as a material of the light-emitting auxiliary layer and the comparative compound C in which two carbazoles are connected than the device used as the light-emitting auxiliary layer material was confirmed to be superior in terms of efficiency and life. This means that when two carbazole-linked compounds are used alone as a light-emitting auxiliary layer, they have a high T1 energy level and a deep HOMO energy level, which causes holes and electrons to form a charge balance and the hole transport layer interface. This is because it is because light emission is performed inside the light emitting layer to maximize higher efficiency and life.

In addition, in Comparative Examples 5 to 7, 9 to 11, and 13 to 15 in which Comparative Compounds A to C were used as the material for the light-emitting auxiliary layer, when the light-emitting auxiliary layer was generally used, the efficiency and efficiency were higher than when the light-emitting auxiliary layer was not used. Although the life is improved, it can be seen that the driving voltage is increased. However, looking at the results of the device using the compound of the present invention as a material for the light-emitting auxiliary layer, it was confirmed that the driving voltage is not increased while improving efficiency and life. That is, the device using the compound of the present invention as a material for the light-emitting auxiliary layer improves efficiency and life, and at the same time, the driving voltage is not increased, but is equal or lower, and exhibits the best result of reducing power consumption. This suggests that, as described in Table 4, the properties of the compound vary significantly depending on the number of carbazole linkages, linkage positions, or other types of substituents, and also the properties of the device to which these compounds are applied can be significantly different.

The above description is merely illustrative of the present invention, and those skilled in the art to which the present invention pertains will be capable of various modifications without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present specification are not intended to limit the present invention, but to explain the present invention, and the spirit and scope of the present invention are not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technologies within the equivalent range should be interpreted as being included in the scope of the present invention.

100: organic electrical element 110: substrate
120: first electrode 130: hole injection layer
140: hole transport layer 141: buffer layer
150: light-emitting layer 151: light-emitting auxiliary layer
160: electron transport layer 170: electron injection layer
180: second electrode

Claims (10)

delete Compound represented by the following formula 2 or formula 3:
<Formula 2><Formula3>

In Chemical Formulas 2 and 3,
Ar ¹ to Ar ⁴ are independently of each other C ₆ ~ C ₂₅ aryl group; And C ₂ to C ₁₈ heterocyclic groups including at least one hetero atom among O, N, and S, and Ar ¹ and Ar ² combine with each other to form a heterocycle containing a carbazole moiety. Can do it,
a and d are each independently an integer from 0 to 4,
b and c are each independently an integer from 0 to 3,
R ¹ to R ⁴ are deuterium, and adjacent groups may combine with each other to form one or two benzene rings,
The aryl and heterocyclic groups are each deuterium; C ₆ ~ C ₂₀ Aryl group; C ₆ ~ C ₂₀ aryl group substituted with deuterium; And C ₂ ~ C ₂₀ It may be substituted with one or more substituents selected from the group consisting of a heterocyclic group. Compounds characterized by being one of the following compounds:

delete A first electrode; A second electrode; And an organic material layer positioned between the first electrode and the second electrode.
The organic material layer comprises an organic electroluminescent device comprising the compound of claim 2 or 3. The method of claim 5,
The compound is an organic electroluminescent device characterized in that it is contained in at least one of the hole injection layer, the hole transport layer, the light emitting auxiliary layer or the light emitting layer of the organic layer. The method of claim 5,
An organic electrical device further comprising a light efficiency improving layer formed on at least one surface of the first electrode and the second electrode opposite to the organic material layer. The method of claim 5,
The organic layer is formed by a spin coating process, a nozzle printing process, an inkjet printing process, a slot coating process, a dip coating process or a roll-to-roll process. A display device comprising the organic electroluminescent element of claim 5; And
And a control unit for driving the display device. The method of claim 9,
The organic electroluminescent device is an electronic device characterized in that it is at least one of an organic electroluminescent device (OLED), an organic solar cell, an organic photoreceptor (OPC), an organic transistor (organic TFT), and a monochromatic or white lighting device.

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