KR101896009B1 - Compound for organic electronic element, organic electronic element using the same, and a electronic device thereof - Google Patents

Abstract

The present invention relates to an indenofluorene derivative and an organic electroluminescent device using the same. More specifically, the present invention relates to an organic electroluminescent device using the same, and more particularly, to an organic electroluminescent device using the same, which is useful as an organic electroluminescent device in hole injection, hole transport, And is particularly useful as a light emitting material, a host, and a dopant alone. Further, the present invention relates to an organic light emitting device having characteristics such as high luminous efficiency, low driving voltage, color purity, stability and lifetime of a device which are required characteristics of an organic electroluminescent device.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescent device including an organic electroluminescent device,

TECHNICAL FIELD [0001] The present invention relates to a compound for an organic electronic device including an indenofluorene, an organic electronic device including the same, and an electronic device therefor.

Mr. Eastman Kodak of the 1980s. W. C. W. Tang et al. Have made organic electroluminescent devices using organic materials practical by developing laminated structure devices in which various roles are shared among various materials. They emit phosphors capable of transporting electrons and organic materials capable of transporting holes, and both charges are injected into the phosphor layer to emit light, so that a luminance of 1000 cd / m 2 or more can be obtained at a voltage of 10 V or less .

In general, organic light emission phenomenon refers to a phenomenon in which an organic material is used to convert electric energy into light energy. An organic electric device using an organic light emitting phenomenon generally has a structure including an anode, an anode, and an organic material layer therebetween. Here, in order to increase the efficiency and stability of the organic electronic device, the organic material layer is often formed of a multilayer structure composed of different materials, and may be formed of a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer.

A material used as an organic material layer in an organic electric device may be classified into a light emitting material and a charge transporting material such as a hole injecting material, a hole transporting material, an electron transporting material, and an electron injecting material depending on functions. The light emitting material may be classified into a polymer type and a low molecular type depending on the molecular weight, and may be classified into a phosphorescent material derived from singlet excited state of electrons and a phosphorescent material derived from the triplet excited state of electrons . Further, the light emitting material can be classified into blue, green, and red light emitting materials and yellow and orange light emitting materials required to realize better natural color depending on the luminescent color.

Particularly, various studies have been conducted on organic materials inserted into a hole transporting layer or a buffer layer for an excellent lifetime characteristic of an organic electric device. To this end, a high hole transporting property from an anode to an organic layer is given, A hole injection layer material having high uniformity and low crystallinity is required.

It is possible to delay penetration and diffusion of the metal oxide from the anode electrode (ITO), which is one of the causes of shortening the lifetime of the organic electronic device, and to stabilize the joule heating caused by driving the device, Lt; RTI ID = 0.0 > layer < / RTI > It is also reported that the low glass transition temperature of the hole transporting layer material significantly affects the lifetime of the device depending on the characteristics of the uniformity of the thin film surface collapsing during device operation. In addition, the deposition method is the mainstream in the formation of OLED devices, and a material that can withstand such a long time, that is, a material having high heat resistance characteristics, is required.

On the other hand, when only one material is used as a light emitting material, there arises a problem that the maximum light emission wavelength shifts to a long wavelength due to intermolecular interaction, the color purity decreases, or the efficiency of the device decreases due to the light emission attenuating effect. A host / dopant system may be used as a light emitting material in order to increase the light emitting efficiency through the light emitting layer. When the dopant having a smaller energy band gap than the host forming the light emitting layer is mixed with a small amount of the light emitting layer, the excitons generated in the light emitting layer are transported to the dopant to emit light with high efficiency. At this time, since the wavelength of the host is shifted to the wavelength band of the dopant, the desired wavelength light can be obtained depending on the type of the dopant used.

In order to sufficiently exhibit the excellent characteristics of the organic electroluminescent device described above, a material constituting the organic material layer in the device, such as a hole injecting material, a hole transporting material, a light emitting material, an electron transporting material, and an electron injecting material is supported by a stable and efficient material However, stable and efficient development of an organic material layer for an organic electric device has not yet been sufficiently developed, and therefore development of a new material is continuously required.

An object of the present invention is to provide an indenofluorene derivative and an organic electroluminescent device using the same, which can improve a high luminous efficiency, a low driving voltage, a high heat resistance, a color purity and a lifetime of the device.

Specifically, the present invention solves the above-mentioned problems of the prior art and provides a light emitting device, a light emitting device, a light emitting device, and a method of manufacturing the same, ≪ / RTI >

In Formula 1,

(1) R ₁ and R ₂ are each independently of the other hydrogen;

C ₁ ~ alkenyl group of the C ₂₀ alkyl group, C ₂ ~ C ₂₀ of, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ aryl group of C ₂₀ aryl group, a C ₆ ~ C ₂₀ substituted with deuterium, C ₇ alkyl ~ C ₂₀ aryl group, C ₈ ~ C ₂₀ aryl alkenyl group, C ₂ ~ C ₂₀ of the hetero ring group, nitrile group and acetylene group unsubstituted or substituted with a substituent selected from the group consisting of C ₁ ~ C ₅₀ ;

Hydrogen, deuterium, tritium, a halogen group, C ₁ ~ C ₂₀ alkyl group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ C ₂₀ of the arylamine group, C ₆ ~ C _60-aryl group, of a C ₆ ~ C ₂₀ substituted by deuterium aryl group, C ₇ ~ heterocyclic group of C ₂₀ arylalkyl groups, C ₈ ~ C ₂₀ arylalkenyl group, C ₂ ~ C ₂₀ of the nitrile group and with a substituent selected from the group consisting of acetylene substituted or unsubstituted C ₂ ~ C ₂₀ alkenyl; And

Of hydrogen, deuterium, halogen, C alkyl group of _{1 ~ C 20, C 1 ~} C 20 alkoxy group, C ₁ ~ C ₂₀ alkyl amine group, C ₁ ~ C ₂₀ alkyl thiophene group, C ₆ ~ C ₂₀ of the aryl thiophene group, a C ₂ ~ C ₂₀ alkenyl group, C ₂ ~ C ₂₀ of the alkynyl group, C ₃ ~ C ₂₀ cycloalkyl group, C ₆ ~ C ₆₀ aryl group, a C ₆ ~ C ₂₀ substituted with heavy hydrogen in the aryl group, a C ₈ ~ C ₂₀ aryl alkenyl group, a silane group, a boron group, a germanium group, a C ₂ ~ C substituted with a substituent selected from the group consisting of ₂₀ groups of the heterocyclic or unsubstituted C for ₆ ~ C ₆₀ aryl Group ; , ≪ / RTI >

(2) when L is a monovalent linking group, hydrogen; heavy hydrogen; Tritium; A halogen group ;

Hydrogen, deuterium, tritium, a halogen group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ C ₂₀ aryl group, a C ₆ ~ C ₂₀ substituted with a heavy hydrogen of the aryl group, C arylalkyl group of _{7 ~ C 20, C 8 ~} C 20 aryl alkenyl group, C ₂ ~ C ₂₀ of the heterocyclic group, the in nitrile group and acetylene group the group consisting of unsubstituted or substituted with substituent C ₁ ~ C ₅₀ An alkyl group ;

Hydrogen, deuterium, tritium, a halogen group, C ₁ ~ alkyl group of C _20, C ₁ ~ C ₂₀ alkoxy group, C ₁ ~ alkyl amine group of the C _20, C ₁ ~ alkyl thiophene group of C _20, C ₆ of ~ C ₂₀ aryl thiophene group, a C ₂ ~ C ₂₀ alkenyl group, C ₂ ~ C ₂₀ of the alkynyl group, C ₃ ~ C ₂₀ cycloalkyl group, C ₆ ~ C ₂₀ aryl group, a substituted C by deuterium ₆ ~ C ₂₀ aryl group, a heterocyclic group of C ₈ ~ C ₂₀ arylalkenyl group, a silane group, a boron group, a germanium group, a C ₂ ~ C ₂₀ of, An aryl group of C ₆ ~ C ₆₀ aryl amine unsubstituted or substituted with a substituent selected from the group consisting of a C ₆ ~ C ₆₀ of;

Hydrogen, deuterium, tritium, a halogen group, C ₁ ~ C ₂₀ alkyl group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ C ₂₀ of the arylamine group, C ₆ ~ C ₆₀ aryl group, of a C ₆ ~ C ₂₀ substituted by deuterium aryl group, C ₇ ~ heterocyclic group of C ₂₀ arylalkyl groups, C ₈ ~ C ₂₀ arylalkenyl group, C ₂ ~ C ₂₀ of the nitrile group and A substituted or unsubstituted C ₂ to C ₆₀ heterocyclic group containing at least one heteroatom selected from the group consisting of O, N, S, Si and P, substituted or unsubstituted with a substituent selected from the group consisting of an acetylene group,

A halogen atom, an amino group, a nitrile group, a nitro group, a C ₁ to C ₂₀ alkyl group, a C ₂ to C ₂₀ alkenyl group, a C ₁ to C ₂₀ alkoxy group, a C ₃ to C ₃₀ cycloalkyl group, C ₆ ~ C ₆₀ aryl group, C ₂ ~ C ₆₀ unsubstituted or substituted with a substituent selected from the group yirwojin group heterocyclic C ₆ ~ C ₆₀ arylamine group;

Hydrogen, deuterium, tritium, a halogen group, C ₁ ~ C ₂₀ alkyl group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ C ₂₀ of the arylamine group, C ₆ ~ C ₆₀ aryl group, of a C ₆ ~ C ₂₀ substituted by deuterium aryl group, C ₇ ~ heterocyclic group of C ₂₀ arylalkyl groups, C ₈ ~ C ₂₀ arylalkenyl group, C ₂ ~ C ₂₀ of the nitrile group and with a substituent selected from the group consisting of acetylene substituted or unsubstituted C ₂ ~ C ₂₀ alkenyl;

Hydrogen, deuterium, tritium, a halogen group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ C ₂₀ aryl group, a C ₆ ~ C ₂₀ substituted with a heavy hydrogen of the aryl group, C ₇ ~ C ₂₀ aryl group, C ₈ ~ C ₂₀ aryl alkenyl group, C ₂ ~ C ₂₀ of the hetero ring group, nitrile group and acetylene group group substituents a substituted or unsubstituted C ₁ ~ C ₃₀ selected from the consisting of An alkoxy group ;

Hydrogen, deuterium, tritium, a halogen group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ C ₂₀ aryl group, a C ₆ ~ C ₂₀ substituted with a heavy hydrogen of the aryl group, A C ₁ to C ₂₀ arylalkyl group, a C ₆ to C ₆₀ arylamine group, a C ₈ to C ₂₀ arylalkenyl group, a C ₁ to C ₅₀ alkyl group, a C ₂ to C ₂₀ heterocyclic group,

A fluorene group substituted or unsubstituted with a substituent selected from the group consisting of a nitrile group and an acetylene group; And

Hydrogen, deuterium, tritium, a halogen group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ C ₂₀ aryl group, a C ₆ ~ C ₂₀ substituted with a heavy hydrogen of the aryl group, C ₇ ~ C ₂₀ aryl group, C ₈ ~ C ₂₀ aryl alkenyl group, C ₂ ~ C ₂₀ of the hetero ring group, nitrile group and acetylene group group substituted with substituted or unsubstituted C ₆ ~ C ₃₀ selected from the consisting of An aryloxy group ; , ≪ / RTI >

(3) when L is a divalent linking group, a single bond;

Substituted with a substituent selected from the group consisting of nitro, nitrile, halogen, a C ₁ to C ₂₀ alkyl group, a C ₁ to C ₂₀ alkoxy group, a C ₆ to C ₂₀ aryl group, a C ₂ to C ₂₀ heterocyclic group, or unsubstituted arylene group, a C ₆ ~ C _60;

A C ₆ to C ₂₀ aryl group, a C ₁ to C ₂₀ A fluorenyl group substituted or unsubstituted with an alkyl group ;

C ₃ to C ₆₀ substituted or unsubstituted with a substituent selected from the group consisting of nitro, nitrile, halogen, C ₁ to C ₂₀ alkyl groups, C ₁ to C ₂₀ alkoxy groups, C ₆ to C ₂₀ aryl groups and amino groups. in the hete aryl group; And divalent substituted or unsubstituted aliphatic hydrocarbons ; , ≪ / RTI >

(4) n is 1 or 2,

(5) R ₁ and R ₂ may bond to or react with each other to form a substituted or unsubstituted saturated or unsaturated ring. Here, the neighboring term is a concept including not only the substituent bonded to the mother nucleus but also the mother nucleus itself.

When n is 1, L corresponds to a monovalent linking group, and when n is 2, L corresponds to a divalent linking group. When L is a divalent linking group, it can be a single bond, meaning that L does not exist. In this case, anthracene bonded to two molecules of the indenofluorene compound is directly bonded to each other.

The present invention also provides a compound represented by any one of the following general formulas (2) to (3) to achieve the above objects.

In the above Formulas 2 and 3,

R ₁ , R ₂ and L are the same as R ₁ , R ₂ and L defined in the above formula (1).

In the present specification, the term "aryl group" means a single ring or a heterocyclic aromatic group, and neighboring substituents include aromatic rings formed by bonding or participating in the reaction. For example, the aryl group may be a phenyl group, a biphenyl group, a fluorene group, or a spirobifluorene group.

The term "heterocyclic group" refers to an aromatic or alicyclic monocyclic or heterocyclic ring containing a heteroatom in place of the ring forming carbon, and the adjacent substituent is a hetero Aromatic or alicyclic ring.

More specifically, the above Chemical Formulas 1 to 3 may be one of the following compounds, but is not limited thereto.

The compounds represented by the formulas (1) to (3) may be one of the compounds shown above, but are not limited thereto. Since representative substituents of the compounds represented by the formulas (1) to (3) are difficult to illustrate all the compounds in a wide range, it is to be understood that representative compounds are exemplarily illustrated, but the compounds represented by the formulas And may constitute a part of this specification.

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

By using the indenofluorene derivative compound according to the present invention, it is possible to remarkably improve the light emitting efficiency, the low driving voltage, the high heat resistance, the color purity and the lifetime of the device.

1 to 6 show examples of organic electroluminescent devices to which the compounds of the present invention can be applied.

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

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. 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, It should be understood that an element may be "connected,""coupled," or "connected."

Hereinafter, preparation examples or synthesis examples of some of the compounds belonging to the general formulas (1) to (3) will be described. However, since there are a large number of compounds belonging to the general formulas (1) to (3), some of them will be exemplarily described. Those skilled in the art, that is, those skilled in the art, can prepare the compounds belonging to the present invention which are not illustrated through the following production examples.

Typical Synthetic Method Example

Sub  1 Synthetic method example

Sub  1-1 Synthetic Example

1000 mL 2 gu round bottom flask 5-bromo-1,2-dihydro-acenaphthylene (100 mmol, 23.3g), 2 -Boronobenzoic acid (100 mmol, 16.6g), Pd (PPh 3) 4 (3.0 mmol, 3.45 g) and K ₂ CO ₃ (200 mmol, 27.7 g) were added, and 300 mL of tedrahydrofuran and 100 mL of water were added. After nitrogen was charged, the mixture was stirred at 80 ° C. for 12 hours. When the reaction is completed, the reaction solution is cooled to room temperature and extracted with dichloromethane. The organic solvent layer is removed using MgSO _4, and the solvent is removed by drying under reduced pressure. The obtained reaction product was recrystallized using ethanol to obtain Sub-1-1 as a white solid (22.7 g). (Yield: 83%)

Sub  1-2 Synthetic Examples

Add Sub 1-1 (50.0 mmol, 13.7 g), chlorobenzene (250 mL) and PPA (25 mL) into a 500 mL 2-necked round bottom flask, and stir at room temperature for 12 hours. Add 100 mL of water to the reaction mixture, stir for 10 minutes, and separate the organic layer and the water layer. After extracting with n-hexane, the water of the organic solvent layer is removed using MgSO ₄ , and the solvent is removed by drying under reduced pressure. The crude product thus obtained was separated and purified by silica gel column chromatography using n-hexane to obtain 18.2 g of Sub 1-2 as an off-white solid. (Yield: 75%).

Sub  1-3 Synthetic Examples

Sub 1-2 (25.0 mmol, 6.06 g) is added to a 250 mL 2-neck round bottom flask and dissolved by adding 125 mL of THF as a solvent. The reaction temperature was lowered to -78 ^° C, and 2.5 M n-BuLi (25.0 mmol, 10 mL) was added thereto, followed by stirring at room temperature for 1 hour. The reaction mixture was again cooled to -78 ^° C, and thereto was added iodomethane (62.5 mmol, 8.87 g), followed by further stirring at room temperature for 3 hours. After the reaction was completed, 20 mL of water was added, and the mixture was extracted with diethyl ether. The resulting extract was dried over MgSO ₄ and dried under reduced pressure to obtain a crude product. The crude product was separated and purified by silica gel column chromatography using ethyl acetate and n-hexane to obtain 5.88 g of a sub-1-3 pale solid. (Yield: 87%).

On the other hand, in Example 3, an unsubstituted alkyl group (methyl group in Example 3) Sub 1-2. However, in addition to the unsubstituted alkyl group, C ₂ to C ₂₀ alkenyl groups, C ₁ to C ₂₀ alkoxy groups, C ₆ to C ₂₀ aryl groups, and C the ₆ ~ C ₂₀ aryl group, C ₇ ~ C ₂₀ aryl group, substituted with a substituent selected from aryl alkenyl group, a heterocyclic group, a nitrile group, and the group consisting of an acetylene of C ₂ ~ C ₂₀ of the C ₈ ~ C ₂₀ The same reaction proceeds even in the case of an alkyl group.

Further, hydrogen, deuterium, tritium, a halogen group, C ₁ ~ C ₂₀ alkyl group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ arylamine group of C _20, C ₆ of ~ C ₆₀ aryl group, of a C ₆ ~ C ₂₀ substituted by deuterium aryl group, C ₇ ~ C ₂₀ aryl group, C ₈ ~ C ₂₀ arylalkenyl group, C ₂ ~ C ₂₀ heterocyclic group, a nitrile of the A C ₂ ~C ₂₀ alkenyl group substituted or unsubstituted with a substituent selected from the group consisting of a halogen atom and an acetylene group; or Of hydrogen, deuterium, halogen, C alkyl group of _{1 ~ C 20, C 1 ~} C 20 alkoxy group, C ₁ ~ C ₂₀ alkyl amine group, C ₁ ~ C ₂₀ alkyl thiophene group, C ₆ ~ C ₂₀ of the aryl thiophene group, a C ₂ ~ C ₂₀ alkenyl group, C ₂ ~ C ₂₀ of the alkynyl group, C ₃ ~ C ₂₀ cycloalkyl group, C ₆ ~ C ₆₀ aryl group, a C ₆ ~ C ₂₀ substituted with heavy hydrogen in the C ₆ to C ₆₀ aryl optionally substituted with a substituent selected from the group consisting of an aryl group, a C ₈ to C ₂₀ arylalkenyl group, a silane group, a boron group, a germanium group, and a C ₂ to C ₂₀ heterocyclic group The same reaction proceeds in the case of the base.

Sub  1 Synthetic Example

Sub 1-2 (25.0 mmol, 6.71 g) and I ₂ (25 mmol, 6.35 g) were added to a 250 mL two-neck round bottom flask, and 125 mL of dichloromethane as a solvent was added thereto. The reaction mixture was stirred at room temperature for 5 hours . When the reaction is complete, it is extracted with dichloromethane. The obtained extract is dried with MgSO ₄ and dried under reduced pressure to remove the solvent. The crude product thus obtained was separated and purified by silica gel column chromatography using ethyl acetate and n-hexane to obtain 4.89 g of intermediate Sub 1 as an off-white solid. (Yield: 77%)

Sub  2 Synthetic method example

(25 mmol, 9.9 g), 10-bromoanthracen-9-ylboronic acid (25 mmol, 7.5 g), Pd (PPh ₃ ) ₄ (0.75 mmol, 0.86 g), K ₂ Add CO ₃ (50 mmol, 6.93 g), add 75 mL of tedrahydrofuran and 25 mL of water, fill with nitrogen, and stir at 80 ° C for 6 hours. When the reaction is completed, the reaction solution is cooled to room temperature and extracted with dichloromethane. The organic solvent layer is removed using MgSO _4, and the solvent is removed by drying under reduced pressure. The crude product thus obtained was separated and purified by silica gel column chromatography using ethyl acetate and n-hexane to obtain 9.72 g of Sub 2 as a yellow solid. (Yield: 74%).

Final  1 Synthetic method example

Sub 2 (25 mmol, 13.1 g), Sub 3 compound (25 mmol), Pd (PPh ₃ ) ₄ (0.75 mmol, 0.86 g) and K ₂ CO ₃ (50 mmol, 6.93 g ), 75 mL of tedrahydrofuran and 25 mL of water are added, the mixture is filled with nitrogen, and the mixture is stirred at 80 ° C. for 6 hours. When the reaction is completed, the reaction solution is cooled to room temperature and extracted with dichloromethane. The organic solvent layer is removed using MgSO _4, and the solvent is removed by drying under reduced pressure. The crude product thus obtained was separated and purified by silica gel column chromatography using ethyl acetate and n-hexane to obtain Final 1.

Examples of Sub 3 include, but are not limited to, the following.

The compounds Sub 3-1 to Sub 3-15 were subjected to mass spectrometry (HRMS). The results are shown in Table 1 below.

On the other hand, an alkoxy group of 3-1 to Sub For Sub 3-4 alkyl groups of the compound as set forth as hydrogen, deuterium, tritium, a halogen _{group, C 1 ~ C 20, C} 1 ~ C 20, C 1 ~ C 20 alkyl amine group, C ₁ ~ alkyl group of C ₂₀ thiophene group, C ₆ ~ C ₂₀ aryl thiophene group, C ₂ ~ C ₂₀ alkenyl group, C ₂ ~ C ₂₀ alkynyl group, C ₃ ~ C ₂₀ of a cycloalkyl group, C ₆ ~ C ₂₀ aryl group, of a C ₆ ~ C ₂₀ substituted by deuterium aryl group, an arylalkenyl group of C ₈ ~ C _20, a silane group, a boron group, a germanium group, a C ₂ ~ C ₂₀ A heterocyclic group, An arylamine group substituted with a substituent selected from the group consisting of C ₆ to C ₆₀ arylamine groups.

In the case of Sub 3-5 and Sub 3-6, hydrogen, deuterium, tritium, a halogen group, a C ₁ to C ₂₀ alkyl group, a C ₂ to C ₂₀ alkenyl group, a C ₁ to C ₂₀ alkoxy group, _A C ₆ -C ₂₀ arylamine group, a C ₆ -C ₆₀ aryl group, a C ₆ -C ₂₀ aryl group substituted with deuterium, a C ₇ -C ₂₀ arylalkyl group, a C ₈ -C ₂₀ arylalkenyl group, A substituted heterocyclic group which is substituted or unsubstituted with a substituent selected from the group consisting of a C ₂ to C ₂₀ heterocyclic group, a nitrile group and an acetylene group, and which contains at least one heteroatom selected from O, N, S, Si and P .

In the case of Sub 3-7, hydrogen, deuterium, tritium and halogen groups other than F may be bonded instead of F, and in the case of Sub 3-8, hydrogen, deuterium, tritium, a halogen group, a C ₂ to C ₂₀ alkenyl group, arylalkenyl group of C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ C ₂₀ aryl group, a C ₆ ~ C ₂₀ aryl group, C ₇ ~ C ₂₀ aryl group, C ₈ ~ C ₂₀ substituted by deuterium, A C ₂ to C ₂₀ heterocyclic group, a nitrile group, and an acetylene group.

Further, Sub Sub 3-9 and 3-10 for hydrogen, deuterium, tritium, a halogen group, an amino group, a nitrile group, a nitro group, C ₁ ~ C ₂₀ alkyl group, C ₂ ~ C ₂₀ alkenyl group, C ₁ An arylamine group substituted with a substituent selected from the group consisting of a C ₂₀ to C ₂₀ alkoxy group, a C ₃ to C ₃₀ cycloalkyl group, a C ₆ to C ₆₀ aryl group, and a C ₂ to C ₆₀ heterocyclic group, If the Sub 3-11 hydrogen, deuterium, tritium, a halogen group, C ₁ ~ C ₂₀ alkyl group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ C ₂₀ of the arylamine An aryl group of C ₆ to C ₆₀ substituted with deuterium, a C ₆ to C ₂₀ aryl group substituted with deuterium, a C ₇ to C ₂₀ arylalkyl group, a C ₈ to C ₂₀ arylalkenyl group, a C ₂ to C ₂₀ hetero An alkenyl group substituted with a substituent selected from the group consisting of a halogen group, a nitrile group and an acetylene group.

In the case of Sub 3-12, hydrogen, deuterium, tritium, a halogen group, a C ₂ to C ₂₀ alkenyl group, a C ₁ to C ₂₀ alkoxy group, a C ₆ to C ₂₀ aryl group, a C the ₆ ~ C ₂₀ aryl group, C ₇ ~ C ₂₀ aryl group, substituted with a substituent selected from aryl alkenyl group, a heterocyclic group, a nitrile group, and the group consisting of an acetylene of C ₂ ~ C ₂₀ of the C ₈ ~ C ₂₀ A halogen atom, a C ₂ to C ₂₀ alkenyl group, a C ₁ to C ₂₀ alkoxy group, a C ₆ to C ₂₀ alkenyl group, a substituted or unsubstituted alkoxy group, substituted with ₂₀ aryl group, a heavy hydrogen of C ₆ ~ C ₂₀ aryl group, C ₇ ~ C ₂₀ aryl group, C ₆ ~ C ₆₀ aryl amine group, a C ₈ ~ C ₂₀ arylalkenyl group, C ₁ ~ of C ₅₀ alkyl group, C ₂ ~ C ₂₀ of the heterocyclic group, a nitrile group and in the group consisting of an acetylene may comprise an a fluorene substituted with a substituent of hydrogen, deuterium, tritium, a halogen group, a C ₂ ~ C ₂₀ Alchemists Group, C ₁ ~ C alkoxy group of _20, C ₆ ~ C ₂₀ aryl group, of a C ₆ ~ C ₂₀ substituted by deuterium aryl group, C ₇ ~ C ₂₀ aryl group, C ₈ ~ C ₂₀ of the arylalkenyl A boronic acid substituted with an aryloxy group substituted or unsubstituted with a substituent selected from the group consisting of a halogen atom, a C ₂ to C ₂₀ heterocyclic group, a nitrile group and an acetylene group may also be included in Sub 3.

Synthesis Example of Final Compound 1-2

A solution of 9- (10-bromoanthracen-9-yl) -7,7-dimethyl-5,7-dihydro-4H-indeno [1,7- bc] fluorene (25 mmol, 13.1 g) in a 250 mL two- 75 mmol of tedrahydrofuran and 25 mL of water were added and the mixture was poured into a mixture of nitrogen (25 mmol, 3.0 g), Pd (PPh ₃ ) ₄ (0.75 mmol, 0.86 g) and K ₂ CO ₃ Followed by stirring at 80 DEG C for 6 hours. When the reaction is completed, the reaction solution is cooled to room temperature and extracted with dichloromethane. The organic solvent layer is removed using MgSO _4, and the solvent is removed by drying under reduced pressure. The crude product thus obtained was separated and purified by silica gel column chromatography using ethyl acetate and n-hexane to obtain 9.93 g (yield: 76%) of 1-2.

Synthesis Example of Final Compound 1-7

A solution of 9- (10-bromoanthracen-9-yl) -7,7-dimethyl-5,7-dihydro-4H-indeno [1,7- bc] fluorene (25 mmol, 13.1 g) in a 250 mL two- dibenzo [b, d] thiophen- 2-ylboronic acid (25 mmol, 5.7g), Pd (PPh 3) 4 (0.75 mmol, 0.86g), K 2 CO 3 (50 mmol, 6.93g) into a 75 mL TED Add 25 mL of water and tetrahydrofuran, fill with nitrogen, and stir at 80 ° C for 6 hours. When the reaction is completed, the reaction solution is cooled to room temperature and extracted with dichloromethane. The organic solvent layer is removed using MgSO _4, and the solvent is removed by drying under reduced pressure. The crude product thus obtained was separated and purified by silica gel column chromatography using ethyl acetate and n-hexane to obtain 10.22 g (yield: 65%) of 1-7.

Synthesis Example of Final Compound 2-10

A solution of 9- (10-bromoanthracen-9-yl) -7,7-dimethyl-5,7-dihydro-4H-indeno [1,7- bc] fluorene (25 mmol, 13.1 g) in a 250 mL two- (25 mmol, 8.5 g), Pd (PPh ₃ ) ₄ (0.75 mmol, 0.86 g) and K ₂ CO ₃ (50 mmol, 6.93 g) Add 25 mL of water with hydrofuran, fill with nitrogen, and stir at 80 ° C for 6 hours. When the reaction is completed, the reaction solution is cooled to room temperature and extracted with dichloromethane. The organic solvent layer is removed using MgSO _4, and the solvent is removed by drying under reduced pressure. The crude product thus obtained was separated and purified by silica gel column chromatography using ethyl acetate and n-hexane to obtain 12.6 g (yield: 68%) of 2-10.

Synthesis Example of Final Compound 2-14

A solution of 9- (10-bromoanthracen-9-yl) -7,7-dimethyl-5,7-dihydro-4H-indeno [1,7- bc] fluorene (25 mmol, 13.1 g) in a 250 mL two- 9,9-dimethyl-7- (naphthalen- 1-yl) -9H-fluoren-2-ylboronic acid (25 mmol, 9.1g), Pd (PPh 3) 4 (0.75 mmol, 0.86g), K 2 CO 3 (50 mmol, 6.93 g), 75 mL of tedrahydrofuran and 25 mL of water are added, and the mixture is stirred at 80 ° C. for 6 hours. When the reaction is completed, the reaction solution is cooled to room temperature and extracted with dichloromethane. The organic solvent layer is removed using MgSO _4, and the solvent is removed by drying under reduced pressure. The crude product thus obtained was separated and purified by silica gel column chromatography using ethyl acetate and n-hexane to obtain 12.6 g (yield: 66%) of 2-14.

Final  2 Synthetic method example

Sub  2-1 Synthetic Example

After dissolving Sub 2 (7.4 g, 14 mmol) obtained in the above synthesis in 98 mL of DMF, Bis (pinacolato) diboron (3.91 g, 15.4 mmol), PdCl ₂ (dppf) catalyst (0.34 g, 4.13 g, 42 mmol) were added in this order, followed by stirring for 24 hours to synthesize a borate compound. The resulting compound was separated by silicagel column and recrystallization to obtain 6.41 g (79%) of a borate compound.

Sub  2-2 Example of synthesis

Sub 2-1 (4.58 g, 8 mmol) obtained in the above synthesis was dissolved in 36 mL of THF, Sub 4 compound (8.4 mmol), Pd (PPh ₃ ) ₄ (0.28 g, 0.24 mmol) 24 mmol) and water (18 mL), and the mixture is stirred and refluxed. After the reaction was completed, the reaction mixture was extracted with ether and water. The organic layer was dried over MgSO ₄ and concentrated. The resulting organic material was subjected to silicagel column and recrystallization to obtain product Sub 2-2.

Examples of Sub 4 are as follows, but are not limited thereto.

The results of mass spectrometry (HRMS) on the compounds Sub 4-1 to Sub 4-10 are shown in Table 2 below.

In the case of Sub 4-1 to Sub 4-4, nitro, nitrile, halogen, C ₁ to C ₂₀ alkyl group, C ₁ to C ₂₀ alkoxy group, C ₆ to C ₂₀ aryl group, C ₂ to C ₂₀ An aryl group substituted with a substituent selected from the group consisting of a heterocyclic group and an amino group.

Substituents selected from the group consisting of nitro, nitrile, halogen, C ₁ - C ₂₀ alkyl group, C ₁ - C ₂₀ alkoxy group, C ₆ - C ₂₀ aryl group and amino group for Sub 4-5 and Sub 4-6 Substituted Heteroarylene may also be included. In the case of Sub 4-8 to Sub 4-10, a C ₆ to C ₂₀ aryl group or a C ₁ to C ₂₀ Fluorenyl substituted with an alkyl group may also be included.

Sub  2-3 Synthetic Examples

After dissolving Sub 2-2 (14 mmol) obtained in the above synthesis in 98 mL of DMF, bis (pinacolato) diboron (3.91 g, 15.4 mmol), PdCl ₂ (dppf) catalyst (0.34 g, 0.4 mmol) g, 42 mmol) were added in this order, followed by stirring for 24 hours to synthesize a borate compound. The obtained compound was separated by silicagel column and recrystallization to obtain a borate compound.

Final  2 Synthetic Examples

After Sub 2-3 (8 mmol) obtained in the above synthesis was dissolved in 36 mL of THF, Sub 2 compound (8.4 mmol), Pd (PPh ₃ ) ₄ (0.28 g, 0.24 mmol), NaOH (0.96 g, 24 mmol) And the mixture is stirred and refluxed. After the reaction was completed, the reaction mixture was extracted with ether and water. The organic layer was dried over MgSO ₄ and concentrated. The resulting organic material was subjected to silicagel column and recrystallization to obtain final product.

3-13 Synthetic Example

9,7-dihydro-4H-indeno [1,7-bc] fluoren-9-yl) anthracen-9-yl) phenyl) - (10 mmol) of 4,4,5,5-tetramethyl-1,3,2-dioxaborolane (8 mmol, 6.18 g) was dissolved in 36 mL of THF and then 9- (10-bromoanthracen- 7-dihydro-4H-indeno [ 1,7-bc] fluorene (8.4mmol, 5.46g), Pd (PPh 3) 4 (0.28 g, 0.24mmol), NaOH (0.96 g, 24mmol), was added 18mL of water Then, the mixture is stirred and refluxed. After the reaction was completed, the reaction mixture was extracted with ether and water. The organic layer was dried over MgSO ₄ and concentrated. The resulting organic material was subjected to silicagel column and recrystallization to obtain 5.64 g (yield: 58%) of final product.

3-25 Synthetic Examples

9-yl) anthracen-9-yl) fluorene-9,7'-indeno [1,7-bc] fluorene] 9-yl) -4,4,5,5-tetramethyl-1,3,2-dioxaborolane (8mmol, 6.57g) was dissolved in 36mL of THF and then 9'- (10-bromoanthracen- 4 ', 5'-dihydrospiro [fluorene -9,7'-indeno [1,7-bc] fluorene] (8.4mmol, 5.44g), Pd (PPh 3) 4 (0.28 g, 0.24mmol), NaOH (0.96 g, 24 mmol) and water (18 mL), and the mixture was stirred and refluxed. After the reaction was completed, the reaction mixture was extracted with ether and water. The organic layer was dried over MgSO ₄ and concentrated. The resulting organic material was subjected to silicagel column and recrystallization to obtain 5.65 g (yield: 56%) of final product.

The results of mass spectrometry (HRMS) on the finally synthesized compounds 1-1 to 4-56 were as shown in Table 3 below.

Meanwhile, although each of the substituents of the compounds represented by Chemical Formulas (1) to (3) is broadly related, examples of synthesis of representative compounds have been exemplarily described, but compounds not exemplarily illustrated in the synthesis examples are also included in the present specification .

Further, by introducing various substituents into the core structure having the above structure, it is possible to synthesize a compound having the intrinsic characteristics of the substituent introduced. For example, by introducing a substituent used in a hole injecting layer material, a hole transporting layer material, a light emitting layer material, and an electron transporting layer material used in the production of an organic electronic device including the organic light emitting device into the above structure, Materials can be prepared.

The compounds according to the present invention can be used in various applications in organic electroluminescent devices depending on the kind and nature of substituent groups.

Since the compounds of the present invention are controllable by the core and the substituent, they can act as various layers other than phosphorescent or fluorescent light emitting host hosts.

The organic electroluminescent device of the present invention can be manufactured by a conventional method and material for producing an organic electroluminescent device, except that the above-described compounds are used to form one or more organic substance layers.

It is obvious that the same effects can be obtained even when the compounds of the present invention are used in other organic layers of an organic electroluminescent device, for example, a light-emission assisting layer, an electron injecting layer, an electron transporting layer, and a hole injecting layer.

Meanwhile, the compound of the present invention can be used in a soluble process. That is, the organic compound layer of the organic electronic device described later can be formed by a soluble process of the compound. That is, when the compound is used as an organic material layer, the organic material layer may be formed by a solution process or a solvent process such as spin coating, dip coating, doctor blading, screen printing, inkjet printing, Lt; RTI ID = 0.0 > a < / RTI > fewer layers.

Organic electric devices in which the compounds of the present invention can be used include, for example, organic electroluminescent devices (OLED), organic solar cells, organic photoconductor (OPC) drums, organic transistors (organic TFT)

The organic electroluminescent device (OLED) will be described as one example of organic electroluminescent devices to which the compounds of the present invention can be applied, but the present invention is not limited thereto and the above-described compounds may be applied to various organic electroluminescent devices.

According to another embodiment of the present invention, there is provided an organic electroluminescent device comprising a first electrode, a second electrode and an organic material layer disposed between the first electrode and the second electrode, wherein at least one of the organic material layers comprises the compound of the present invention to provide.

1 to 6 show examples of organic electroluminescent devices to which the compounds of the present invention can be applied.

The organic electroluminescent device according to another embodiment of the present invention can be manufactured by the same method as the organic electroluminescent device except that at least one layer of the organic compound layer including the hole injecting layer, the hole transporting layer, the light emitting layer, the electron transporting layer, Can be made with a structure known in the art using conventional manufacturing methods and materials in the art.

The structure of an organic electroluminescent device according to another embodiment of the present invention is illustrated in FIGS. 1 to 6, but is not limited to these structures.

1 to 6, an organic electroluminescent device includes substrates 101, 201, 301, 401, 501 and 601, anodes 102, 202, 302, 402, 502 and 602, a hole injection layer 103, Emitting layers 105, 205, 305, 405, 505 and 605, electron transporting layers 106, 206, 406 and 506, an electron injection layer 107, And at least one layer of the organic material layers excluding the light emitting layer may be omitted.

The organic electroluminescent device has a hole blocking layer (HBL) for blocking the movement of holes, an electron blocking layer (EBL) for blocking the movement of electrons, a luminescent auxiliary layer for assisting or assisting luminescence and a protective layer It may be located. In the case of the protective layer, it may be formed to protect the organic layer at the uppermost layer or to protect the cathode.

At this time, the compound of the present invention may be included in at least one of organic compound layers including a hole injecting layer, a hole transporting layer, a light emitting layer, and an electron transporting layer.

Specifically, the compound of the present invention may be used as a substitute for one or more of a hole injecting layer, a hole transporting layer, a light emitting layer, an electron transporting layer, an electron injecting layer, a hole blocking layer, May be used. Of course, it can be used for more than two layers, not only one layer of the organic material layer.

In particular, it can be used as a hole injecting material, a hole transporting material, an electron injecting material, an electron transporting material, a light emitting material and a passivation (keping) material according to the compound of the present invention, It can be used as a dopant, and can be used as a hole injecting and hole transporting layer.

For example, the organic electroluminescent device according to another embodiment of the present invention may be formed by using a physical vapor deposition (PVD) method such as sputtering or e-beam evaporation, Oxide or an alloy thereof to form an anode, forming an organic material layer including a hole injecting layer, a hole transporting layer, a light emitting layer, an electron transporting layer and an electron injecting layer on the anode, depositing a material usable as a cathode thereon .

In addition to such a method, the organic material may be formed by sequentially depositing a negative electrode material, an organic material layer, and a positive electrode material on a substrate. The organic material layer may have a multi-layer structure including a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer, but is not limited thereto and may have a single layer structure.

In addition, the organic material layer may be formed by using a variety of polymer materials, not by vapor deposition, but by a solution process or a solvent process such as spin coating, dip coating, doctor blading, screen printing, inkjet printing, It can be manufactured in a small number of layers.

The organic electroluminescent device according to another embodiment of the present invention may be used in a soluble process such as a spin coating process or an ink jet process.

The substrate may be a silicon wafer, a quartz or glass plate, a metal plate, a plastic film, or a sheet.

An anode is placed on the substrate. Such an anode injects holes into the hole injection layer located thereon. The anode material may be a material having a large work function so that hole injection can be smoothly conducted into the organic material layer. Specific examples of the cathode material that can be used in the present invention 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); ZnO: Al or SnO _2: a combination of a metal and an oxide such as Sb; Conductive polymers such as poly (3-methylthiophene), poly [3,4- (ethylene-1,2-dioxy) thiophene] (PEDT), polypyrrole and polyaniline.

A hole injection layer is located on the anode. The conditions required for the material of the hole injection layer are that the hole injection efficiency from the anode is high and the injected holes must be efficiently transported. For this purpose, the ionization potential is small, the transparency to visible light is high, and the stability against holes is excellent.

As the hole injecting material, a hole can be injected from the anode at a low voltage. The highest occupied molecular orbital (HOMO) of the hole injecting material may be between the work function of the anode material and the HOMO of the surrounding organic layer. Specific examples of the hole injecting material include metal porphyrine, oligothiophene, arylamine-based organic materials, hexanitrile hexaazatriphenylene, quinacridone-based organic materials, perylene-based organic materials, Anthraquinone, polyaniline and a polythiophene-based conductive polymer, but are not limited thereto.

A hole transport layer is disposed on the hole injection layer. The hole transport layer transports holes from the hole injection layer to an organic light emitting layer disposed thereon, and has high hole mobility, stability to holes, and electrons. In addition to these general requirements, heat resistance to a device is required when it is applied for vehicle display, and it may be a material having a glass transition temperature (Tg) of 70 DEG C or more.

Materials satisfying such conditions include NPD (or NPB), spiro-arylamine compounds, perylene-arylamine compounds, azacycloheptatriene compounds, bis (diphenylvinylphenyl) anthracene, silicon germanium oxide Compounds, silicone-based arylamine compounds, and the like.

An organic light emitting layer is disposed on the hole transporting layer. The organic light emitting layer is a layer in which holes and electrons injected from the anode and the cathode respectively recombine to emit light, and the organic light emitting layer is made of a material having high quantum efficiency. The light emitting material may be a material capable of emitting light in the visible light region by transporting and receiving holes and electrons from the hole transporting layer and the electron transporting layer, respectively, and may be a material having good quantum efficiency for fluorescence or phosphorescence.

Materials or compounds that satisfy these conditions include Alq3 in the case of green, Balq (8-hydroxyquinoline beryllium salt) in the case of blue, DPVBi (4,4'-bis (2,2-diphenylethenyl) biphenyl series, Spiro material, Spiro-4,4'-bis (2,2-diphenylethenyl) -1,1'-biphenyl), LiPBO (2- (2-benzoxazoyl) -phenolithium salt ), Bis (diphenylvinylphenylvinyl) benzene, aluminum-quinoline metal complexes, imidazoles, thiazole and oxazole metal complexes, and perylene and BczVBi (3,3 ' (1,1'-biphenyl) -4,4'-diyldi-2,1-ethenediyl] bis (9-ethyl) -9H-carbazole; DSA (distrylamine). In the case of red, the green luminescent material was doped with DCJTB ([2- (1,1-dimethylethyl) -6- [2- (2,3,6,7-tetrahydro-1,1,7,7-tetramethyl- -benzo (ij) quinolizin-9-yl) ethenyl] -4H-pyran-4-ylidene] -propanedinitrile).

Polymers such as a polyphenylene vinylene (PPV) -based polymer and polyfluorene may be used for the organic light emitting layer when the light emitting layer is formed using processes such as inkjet printing, roll coating and spin coating .

An electron transporting layer is disposed on the organic light emitting layer. Such an electron transporting layer requires a material capable of efficiently injecting electrons with a high electron injection efficiency from a cathode disposed thereon. For this purpose, it is required to be made of a material having high electron affinity, high electron transfer rate and excellent stability against electrons.

Specific examples of the electron transporting material satisfying such conditions include an Al complex of 8-hydroxyquinoline; Complexes containing Alq3; Organic radical compounds; Hydroxyflavone-metal complexes, and the like, but are not limited thereto.

An electron injection layer is deposited on the electron transport layer. The electron injection layer may be a metal complex compound such as Balq, Alq3, Be (bq) 2, Zn (BTZ) 2, Zn (phq) 2, PBD, spiro-PBD, TPBI or Tf-6P, boron compounds, and the like. At this time, the electron injection layer may be formed in a thickness range of 100 ANGSTROM to 300 ANGSTROM.

On the electron injection layer, a cathode is positioned. These cathodes serve to inject electrons. The material used for the cathode may be the material used for the anode and may be a metal having a low work function for efficient electron injection. Particularly suitable metals such as tin, magnesium, indium, calcium, sodium, lithium, aluminum, silver, or their alloys may be used. Also, an electrode having a two-layer structure such as lithium fluoride and aluminum, lithium oxide and aluminum, strontium oxide and aluminum, etc., having a thickness of 100 μm or less may be used.

As described above, the compound of the present invention can be used as a hole injecting material, a hole transporting material, a light emitting material, an electron transporting material, and an electron injecting material, which are suitable for the fluorescence of all colors such as red, green, It can be used as a host or dopant material of various colors.

The organic electroluminescent device according to the present invention may be of a top emission type, a back emission type, or a both-sided emission type, depending on the material used.

Meanwhile, the present invention includes a display device including the above-described organic electronic device and a terminal including a control unit for driving the display device. This terminal means a current or future wired or wireless communication terminal. The terminal according to the present invention may be a mobile communication terminal such as a mobile phone and includes all terminals such as a PDA, an electronic dictionary, a PMP, a remote controller, a navigation device, a game machine, various TVs, and various computers.

Evaluation of manufacturing of organic electric device

An organic electroluminescent device was fabricated by a conventional method using various compounds obtained through synthesis as a light emitting layer material. First, a hole injection layer (hole injection layer material: 4,4 ', 4 "-tris [2-naphthyl (phenyl) amino] -triphenylamine (2- TNATA)), a hole transport layer of 300Å thickness (the hole transport layer material: N ^4, N ^{4 '-} di (naphthalene-1-yl) -N ^4, N ^4' - diphenyl-biphenyl-4,4'-diamine (NPB ), A light-emitting layer doped with 7% of BD-052X (Idemitsu Co., Ltd.) having a thickness of 450 ANGSTROM (BD-052X being a blue fluorescent dopant and a compound of the present invention as a light emitting host material) was used. (Electron transport layer material: tris (8-quinolinolato) aluminum (Alq ₃ )), an electron injection layer (electron injection layer material: LiF) of 10 Å thickness and an aluminum cathode of 1500 Å thickness were sequentially deposited, Respectively.

          Comparative Example (1) (ADN) Comparative Example (2)

For comparison, an organic electroluminescent device having the same structure as that of the test example was manufactured using the compound of the present invention instead of the compound of the present invention using the comparative example (1) (abbreviated as ADN) and the comparative example (2) Respectively.

Electroluminescence (EL) characteristics were measured by PR-650 of a photoresearch company by applying a forward bias DC voltage to the organic electroluminescent devices thus prepared and the comparative organic electroluminescent devices. As a result of measurement, the luminance was measured at a luminance of 300 cd / The T90 lifetime was measured using a life-time instrument manufactured by McAfee.

Table 4 shows the device fabrication and evaluation results for the experimental and comparative examples to which the compounds according to the present invention were applied.

As can be seen from the above table, the organic electroluminescent device using the material for an organic electroluminescent device of the present invention can be used as a material for a light emitting layer, thereby remarkably improving high luminous efficiency, life span and color purity. In particular, the comparative example (2) in which the fluorene group was substituted on one side of the ADN of the comparative example (1) further improved the efficiency and lifetime, and the compounds of the present invention were found to be more improved in luminous efficiency and lifetime .

It is obvious that the same effects can be obtained even when the compounds of the present invention are used for other organic layers of an organic electroluminescent device, for example, a hole injecting layer, a hole transporting layer, an electron injecting layer and an electron transporting layer.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Accordingly, the embodiments disclosed herein are intended to be illustrative rather than limiting, 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 construed according to the following claims, and all the techniques within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (11)

A compound for an organic electroluminescent device comprising a compound represented by the following formula (1).
≪ Formula 1 >

In Formula 1,
(1) R ₁ and R ₂ are each independently of the other hydrogen;
C ₁ ~ alkenyl group of the C ₂₀ alkyl group, C ₂ ~ C ₂₀ of, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ aryl group of C ₂₀ aryl group, a C ₆ ~ C ₂₀ substituted with deuterium, C ₇ alkyl ~ C ₂₀ aryl group, C ₈ ~ C ₂₀ aryl alkenyl group, C ₂ ~ C ₂₀ of the hetero ring group, nitrile group and acetylene group unsubstituted or substituted with a substituent selected from the group consisting of C ₁ ~ C ₅₀ ;
Hydrogen, deuterium, tritium, a halogen group, C ₁ ~ C ₂₀ alkyl group, C ₂ ~ C ₂₀ alkenyl group, C ₁ ~ C ₂₀ alkoxy group, C ₆ ~ C ₂₀ of the arylamine group, C ₆ ~ C ₆₀ aryl group, of a C ₆ ~ C ₂₀ substituted by deuterium aryl group, C ₇ ~ heterocyclic group of C ₂₀ arylalkyl groups, C ₈ ~ C ₂₀ arylalkenyl group, C ₂ ~ C ₂₀ of the nitrile group and A C ₂ -C ₂₀ alkenyl group substituted or unsubstituted with a substituent selected from the group consisting of an acetylene group; And
Of hydrogen, deuterium, halogen, C alkyl group of _{1 ~ C 20, C 1 ~} C 20 alkoxy group, C ₁ ~ C ₂₀ alkyl amine group, C ₁ ~ C ₂₀ alkyl thiophene group, C ₆ ~ C ₂₀ of the aryl thiophene group, a C ₂ ~ C ₂₀ alkenyl group, C ₂ ~ C ₂₀ of the alkynyl group, C ₃ ~ C ₂₀ cycloalkyl group, C ₆ ~ C ₆₀ aryl group, a C ₆ ~ C ₂₀ substituted with heavy hydrogen in the C ₆ to C ₆₀ aryl optionally substituted with a substituent selected from the group consisting of an aryl group, a C ₈ to C ₂₀ arylalkenyl group, a silane group, a boron group, a germanium group, and a C ₂ to C ₂₀ heterocyclic group Group ; , ≪ / RTI >
(2) n is 2,
(3) L is a group consisting of nitro, nitrile, halogen, a C ₁ to C ₂₀ alkyl group, a C ₁ to C ₂₀ alkoxy group, a C ₆ to C ₂₀ aryl group, a C ₂ to C ₂₀ heterocyclic group, substituted with a substituent selected from or unsubstituted C ₆ ~ C ₆₀ arylene group; A C ₆ to C ₂₀ aryl group, a C ₁ to C ₂₀ A fluorenyl group substituted or unsubstituted with an alkyl group ; C ₃ to C ₆₀ substituted or unsubstituted with a substituent selected from the group consisting of nitro, nitrile, halogen, C ₁ to C ₂₀ alkyl groups, C ₁ to C ₂₀ alkoxy groups, C ₆ to C ₂₀ aryl groups and amino groups. A heteroarylene group; And divalent substituted or unsubstituted aliphatic hydrocarbons ; , ≪ / RTI >
(4) R ₁ and R ₂ may bond to or react with each other to form a substituted or unsubstituted saturated or unsaturated ring. The method according to claim 1,
Wherein R ₁ and R ₂ are bonded to each other or react with each other to form a saturated or unsaturated ring. The method according to claim 1,
Wherein the compound represented by Formula 1 is the following compound.

The method according to claim 1,
A compound for an organic electroluminescent device, characterized in that it is one of the following compounds.

An organic electroluminescent device comprising at least one organic layer comprising the compound of claim 1. 6. The method of claim 5,
Wherein said compound is formed into said organic material layer by a solution process. 6. The method of claim 5,
An organic electroluminescent device comprising a first electrode, an organic material layer and a second electrode sequentially laminated. 6. The method of claim 5,
Wherein the organic material layer comprises at least one of a light emitting layer, a hole injecting layer, a hole transporting layer, an electron injecting layer, and an electron transporting layer. 9. The method of claim 8,
Wherein the compound is used as a host material of the light emitting layer. A display device comprising the organic electroluminescent device of claim 5; And
A controller for driving the display device; ≪ / RTI > 11. The method of claim 10,
Wherein the organic electronic device is one of an organic electroluminescent device (OLED), an organic solar cell, an organic photoconductor (OPC), and an organic transistor (organic TFT).

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