KR101149528B1 - Aromatic Compound and organoelectroluminescent device using the same - Google Patents

Abstract

The present invention relates to an aromatic compound represented by the following formula (1) and an organic electroluminescent device comprising the same, the organic electroluminescent device comprising an aromatic compound according to the present invention is easy to control the electron mobility driving efficiency It is high and is excellent in life characteristics.

Formula (1)

Description

Aromatic Compound and organoelectroluminescent device using the same

The present invention relates to an aromatic compound and an organic light emitting device using the same, and more particularly, to an organic light emitting device having a high driving efficiency and a long lifespan due to easy control of the aromatic compound and electron mobility using the same.

The organic light emitting device is gradually expanding its application field to the display and lighting field of various electronic products, but the efficiency and lifespan characteristics are restricting the expansion of the application field. There is a lot of research going on. In terms of materials, the host-dopant system is mainly adopted as a method for maximizing luminous efficiency, and the dopant as a luminescent material is phosphorescent material, and CBP (4, 4'-N, N'-dicarbazolbipheny) and substances in which various substituents are introduced into carbazole (Japanese Patent Laid-Open No. 2008-214244, Japanese Patent Laid-Open No. 2003-133075) are known, but further improvement is required in terms of efficiency and lifetime characteristics.

The first object of the present invention is to provide a novel aromatic compound that has a low driving voltage and high luminous efficiency of the organic light emitting device.

In addition, a second technical problem to be solved by the present invention is to provide an organic electroluminescent device comprising a layer containing the aromatic compound.

In order to achieve the first object, the present invention provides an aromatic compound of formula (1).

Where

Ar ₁ to Ar ₃ are each independently a substituted or unsubstituted aromatic hydrocarbon group,

A ₁ to A ₁₅ is hydrogen, deuterium, halogen, alkyl group, silyl group, aralkyl group, alkenyl group, alkynyl group, cyano group, diarylamino group, diaralkylamino group, amino group, nitro group, acyl group, alkoxycarbonyl group, carboxyl group, An alkoxyl group, an alkylsulfonyl group, a haloalkyl group, a hydroxyl group, an amide group, an arylamine group, a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted aromatic heterocyclic group,

Two groups of R ₁ to R ₄ form a ring, and the rest are alkyl, silyl, aralkyl, alkenyl, alkynyl, cyano, diakalamino, diaralalkylamino, amino, nitro, acyl, alkoxy Carbonyl group, carboxyl group, alkoxyl group, alkylsulfonyl group, haloalkyl group, hydroxyl group, amide group, substituted or unsubstituted aromatic hydrocarbon group or substituted or unsubstituted aromatic heterocyclic group,

R ₅ to R ₁₂ represent an alkyl group, silyl group, aralkyl group, alkenyl group, alkynyl group, cyano group, dialkylamino group, diaralkylamino group, amino group, nitro group, acyl group, alkoxycarbonyl group, carboxyl group, alkoxyl group, alkylsulfonyl group , Haloalkyl group, hydroxyl group, amide group, substituted or unsubstituted aromatic hydrocarbon group or substituted or unsubstituted aromatic heterocyclic group,

X ₁ to X ₉ are C or N, at least two of the three X in each ring must be N,

l and m are 0 or 1, l + m = 1,

n, o, p is an integer of 0, 1, 2, and n + o + p is 4 or less.

According to one embodiment of the present invention, the compound may be an aromatic compound represented by the following formula (2).

According to another embodiment of the present invention, the compound may be an aromatic compound represented by the following formula (3).

According to another embodiment of the present invention, the compound may be an aromatic compound represented by the following formula (4).

In addition, according to another embodiment of the present invention, the compound may be any one compound selected from the group represented by the following formula SPH01 to formula SPH102.

         SPH01 SPH02

         SPH03 SPH04

         SPH05 SPH06

         SPH07 SPH08

         SPH09 SPH10

         SPH11 SPH12

         SPH13 SPH14

         SPH15 SPH16

         SPH17 SPH18

         SPH19 SPH20

         SPH21 SPH22

         SPH23 SPH24

SPH25 SPH26

             SPH27 SPH28

           SPH29 SPH30

           SPH31 SPH32

           SPH33 SPH34

           SPH35 SPH36

           SPH37 SPH38

           SPH39 SPH40

           SPH41 SPH42

           SPH43 SPH44

           SPH45 SPH46

           SPH47 SPH48

           SPH49 SPH50

           SPH51 SPH52

           SPH53 SPH54

           SPH55 SPH56

           SPH57 SPH58

           SPH59 SPH60

           SPH61 SPH62

           SPH63 SPH64

           SPH65 SPH66

           SPH67 SPH68

           SPH69 SPH70

           SPH71 SPH72

           SPH73 SPH74

           SPH75 SPH76

           SPH77 SPH78

           SPH79 SPH80

           SPH81 SPH82

           SPH83 SPH84

           SPH85 SPH86

           SPH87 SPH88

           SPH89 SPH90

           SPH91 SPH92

           SPH93 SPH94

           SPH95 SPH96

           SPH97 SPH98

           SPH99 SPH100

           SPH101 SPH102

In addition, in order to solve the second technical problem, the present invention is an anode; Cathode; And it is interposed between the anode and the cathode, and provides an organic electroluminescent device comprising a layer containing an aromatic compound represented by the formula (1).

At this time, the aromatic compound is preferably included in the light emitting layer between the anode and the cathode, the thickness of the light emitting layer is more preferably 50 to 2,000 kPa.

In addition, the organic light emitting device according to an embodiment of the present invention comprises at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, a hole blocking layer, an electron transport layer, an electron injection layer and an electron blocking layer between the anode and the cathode. It may further include.

By using the aromatic compound according to the present invention, it is possible to provide an organic electroluminescent device which is easy to control electron mobility and has high driving efficiency and excellent life characteristics.

Although the aromatic compound represented by the formula (1) according to the present invention can be effectively used in all layers of the organic field device, especially when employed as a light emitting layer host, holes and electrons can be easily moved to maintain a balance between holes and electrons. Therefore, exciton formation in the light emitting layer can be maximized.

An organic light emitting display device according to the present invention includes an anode; Cathode; And a layer comprising an aromatic compound represented by the formula (1) interposed between the anode and the cathode.

Referring to the organic light emitting device according to the present invention in more detail, the organic light emitting device comprises at least one layer selected from the group consisting of a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and an electron injection layer between the anode and the cathode. The hole injection layer, the hole transport layer, the electron transport layer and the electron injection layer may further increase the probability of light emitting coupling in the light emitting layer by efficiently transferring holes or electrons to the light emitting layer.

The hole injection layer and the hole transport layer are laminated to facilitate the injection of holes from the anode and the transport of the injected holes. As the material for the hole transport layer, electron donor molecules having small ionization potential are used. Diamine, triamine or tetraamine derivatives based on amines are frequently used. In the present invention, as the material of the hole transport layer, as long as it is commonly used in the art, a variety of materials can be used without limitation, for example, N, N'-bis (3-methylphenyl) -N, N'-diphenyl- [1,1-biphenyl] -4,4'-diamine (TPD) or N, N'-di (naphthalen-1-yl) -N, N'-diphenyl benzidine (α- NPD) and the like can be used. In addition, a hole injection layer (HIL) may be further stacked below the hole transport layer, and the hole injection layer material may also be used without particular limitation as long as it is commonly used in the art. For example, CuPc or Starburst type amines such as TCTA, m-MTDATA, IDE406 (manufactured by Idemitsu Corp.) and the like can be used.

                 CuPc TCTA

            m-MTDATA

An organic light emitting layer is stacked on the hole transport layer, and the organic light emitting layer may be made of a single material or may be made of a host / dopant.

In general, when the compound is used as a single material, a host / dopant-based light emitting layer is preferable, because an intermolecular interaction generates a mound peak at long wavelengths, resulting in poor color purity, and low efficiency due to a light emission decay effect. The indolocarbazole derivative may be used as a host material in the host / dopant light emitting layer. In the host / dopant light emitting layer, a host material generally uses CBP (4,4'-dicarbazolyl-1,1'-biphenyl), and a dopant material uses Ir (ppy) 3 a lot, but is generally used in the art. It is not particularly limited as long as it is used as. The electron transport layer serves to increase the chance of recombination in the light emitting layer by smoothly transporting electrons supplied from the cathode to the light emitting layer and suppressing movement of holes that are not bonded in the light emitting layer. Such electron transport layer material is not particularly limited as long as it is a material used in the art, for example, Alq 3 (tri-8-hydroxyquinoline aluminum), PBD (2- (4-biphenylyl) -5- ( 4-t-butylphenyl) -1,3,4-oxadiazole), TNF (2,4,7-trinitro fluorenone), BMD, BND and the like can be used.

Meanwhile, an electron injection layer (EIL), which facilitates electron injection from the cathode and ultimately improves power efficiency, may be further stacked on the electron transport layer. Also commonly used in the art may be used without particular limitation, for example, it may be used a material such as LiF, NaCl, CsF, Li2O, BaO.

Furthermore, in addition to the above-described hole injection layer, hole transport layer, electron transport layer, and electron injection layer, the organic light emitting device according to the present invention may further include additional functional laminated structures such as a hole blocking layer or an electron blocking layer. . At this time, the hole blocking layer serves to prevent such a problem by using a material having a very low HOMO level because the life and efficiency of the device is reduced when holes are introduced into the cathode through the organic light emitting layer. The material constituting the hole blocking layer is not particularly limited, but must have an ionization potential higher than that of the light emitting compound while having an electron transport ability, and typically BAlq, BCP, TPBI, and the like may be used.

More specifically, FIGS. 1A to 1F illustrate organic light emitting diodes having various types of stacked structures. Referring to this, the organic light emitting diode of FIG. 1A includes an anode / hole injection layer / light emitting layer / cathode. The organic electroluminescent device of FIG. 1B has a structure consisting of an anode / hole injection layer / light emitting layer / electron injection layer / cathode. In addition, the organic light emitting display device of FIG. 1c has a structure of an anode / hole injection layer / hole transporting layer / light emitting layer / cathode, and the organic light emitting device shown in FIG. 1d includes an anode / hole injection layer / hole transporting layer / light emitting layer / electron injection. The organic electroluminescent device of FIG. 1E has a structure of a layer / cathode, and has an anode / hole injection layer / hole transport layer / light emitting layer / electron transport layer / electron injection layer / cathode. Finally, the organic electroluminescent device of FIG. 1F is an anode. It has a structure of / hole injection layer / hole transport layer / light emitting layer / hole blocking layer / electron transport layer / electron injection layer / cathode.

The organic electroluminescent device according to the present invention may include the aromatic compound of the formula (1) in various laminated structures interposed between the anode and the cathode, but preferably, the aromatic compound is a host in the light emitting layer between the anode and the cathode. Can be used as a substance.

In addition, the thickness of the light emitting layer may be 50 to 2,000 kW, but when the thickness is less than 50 kW, the luminous efficiency is lowered, and when it exceeds 2,000 kW, the driving voltage is uneconomical.

A method of manufacturing an organic light emitting display device according to the present invention will be described with reference to FIGS. 1A to 1F.

First, an anode material is coated on the substrate. As the substrate, a substrate used in a conventional light emitting device is used. A glass substrate or a transparent plastic substrate having excellent transparency, surface smoothness, ease of handling, and waterproofness is preferable. In addition, as the anode material, materials commonly used in the art, such as transparent and highly conductive indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO 2), or zinc oxide (ZnO), may be used. . A hole injection layer is stacked on the anode, and then a hole transport layer is formed on the hole injection layer.

Next, after the light emitting layer is laminated on the hole transport layer, a hole blocking layer is selectively formed thereon. Finally, after the electron transport layer is laminated on the hole blocking layer, the electron injection layer may be selectively formed, and the organic light emitting diode according to the present invention may be manufactured by vacuum thermal depositing a metal for forming a cathode on the electron injection layer. Will be. Lamination of the organic layer is performed by one or more methods selected from the methods of vacuum thermal deposition, spin coating or inkjet printing.

On the other hand, as the metal for forming the cathode, lithium (Li), magnesium (Mg), aluminum (Al), aluminium-lithium-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), Magnesium-silver (Mg-Ag) or the like may be used, and a transmissive cathode using ITO or IZO may be used to obtain a front light emitting device.

Example 1 Synthesis of Compound SPH04

Example 1- (1): Synthesis of 2-diphenylamino-4,6-dichloro-1,3,5-triazine

2,4,6-trichloro-1,3,5-triazine (10 g, 0.054 mol) in a 250 ml reactor was dissolved in 110 ml of dry THF and then N, N-diisopropylethyleneamine (10.4 ml, 0.0596 mol) Add and bring the temperature of the reactor to zero. To this mixture was added dropwise a 100 ml solution of THF of diphenylamine (9.2 g, 0.054 mol) at zero degree. After completion of the dropwise addition, the temperature was raised to room temperature, followed by stirring for 3 hours. After the reaction was completed, the precipitated white solid was filtered. After distilling off the filtrate, the resulting solid was dissolved in 100 ml of dichloromethane, 200 ml of methanol was added, and the solid was precipitated to obtain 9.3 g of a white solid 2-diphenylamino-4,6-dichloro-1,3,5-triazine. (54%)

Example 1- (2): Synthesis of 2-diphenylamino-4-phenyl-6-chloro-1,3,5-triazine

After making nitrogen atmosphere in 100ml reactor, add magnesium (0.84g, 0.0346mol), 10ml of dry THF and a small amount of iodine and stir for 30 minutes. To this mixture is added a dry THF solution of bromobenzene (4.8 g, 0.0304 mol) dropwise at zero degree.

Stir for 2 hours after dropping. 2-diphenylamino-4,6-dichloro-1,3,5-triazine (9 g, 0.0284 mol) in a 250 ml reactor was dissolved in 50 ml of dry THF and added dropwise to the bromobenzene solution.

After dropping, the mixture is stirred at room temperature for 12 hours. After the reaction was completed, 100 ml of 2N HCl was added.

The organic layer was separated by layer separation, ethyl acetate and water were added and extracted to neutralize. The organic layer is dried under reduced pressure after anhydrous treatment to remove the organic solvent. 150 ml of hexane was added to 20 ml of ether ether acetate, followed by stirring and filtration to obtain 6.3 g of a white solid 2-diphenylamino-4-phenyl-6-chloro-1,3,5-triazine. (61.8%)

Example 1- (3): Synthesis of 2-diphenylamino-4-phenyl-6-bromophenoxy-1,3,5-triazine

4-bromoanisole (2.9 g, 0.0167 mol) was dissolved in 10 ml of dry THF in a 100 ml reactor, and 0.7 g of sodium hydrazine (60%) was added thereto and stirred. 2-diphenylamino-4-phenyl- A 50 ml solution of dry THF of 6-chloro-1,3,5-triazine (6 g, 0.0167 mol) is added dropwise. After dropping, the mixture is stirred at room temperature for 12 hours.

After completion of the reaction, the organic solvent was removed under reduced pressure and extracted with ethyl acetate and water.

The organic layer was dried under reduced pressure after anhydrous treatment, and the organic solvent was removed. The organic layer was dissolved in 20 ml of dichloromethane, 150 ml of methanol was added to precipitate a solid, followed by filtration to give a white solid 2-diphenylamino-4-phenyl-6-bromophenoxy-1, 4.7 g of 3,5-triazine was obtained (57%).

Example 1- (4): Synthesis of SPH04

Indolocarbazole (2.2 g, 0.0066 mol), 2-diphenylamino-4-phenyl-6-bromophenoxy-1,3,5-triazine (4 g. 0.0079 mol), 0.1 g of copper in a 100 ml reactor Add 0.1 g of 18-crown-6, 1.8 g of potassium carbonate, and 30 ml of 1,2-dichlorobenzene to reflux for 20 hours. After completion of the reaction, the reaction mixture was cooled to room temperature, ethyl acetate 100ml was added, the solution was filtered, the filtrate was distilled under reduced pressure, and the organic layer was concentrated. Ethyl acetate: hexane (1: 5) was column separated using a developing solvent to obtain 2.3 g of a white solid (SPH04). (47%)

MS (MALDI-TOF): m / z 745 [M] ⁺

Example 2: Synthesis of Compound SPH01

2,4-diphenyl-6-chloro-1,3,5-triazine in place of 2-diphenylamino-4-phenyl-6-chloro-1,3,5-triazine in Example 1- (3) Synthesis was carried out in the same manner, except that 3.5 g (yield 43%) of SPH01 was obtained as a white solid.

MS (MALDI-TOF): m / z 654 [M] ⁺

Example 3: Synthesis of Compound SPH03

Except that 3-bromoanisole was used instead of 4-bromoanisole in Example 1- (3), the synthesis was carried out in the same manner to obtain 2.1 g of SPH03 (yield 45%) as a white solid.

MS (MALDI-TOF): m / z 745 [M] ⁺

Example 4: Synthesis of Compound SPH41

2,4-diphenyl-6-chloro-1,3,5-triazine in place of 2-diphenylamino-4-phenyl-6-chloro-1,3,5-triazine in Example 1- (3) Except for using Indolocarbazole instead of N-phenyl indolocarbazole in Example 1- (4), and synthesized in the same manner to give 2.7g (39% yield) of SPH41 as a white solid.

MS (MALDI-TOF): m / z 902 [M] ⁺

Example 5: Synthesis of Compound SPH55

2-carbazole-4-phenyl-6-chloro-1,3,5- instead of 2-diphenylamino-4-phenyl-6-chloro-1,3,5-triazine in Example 1- (3) Except for using triazine, the synthesis was carried out in the same manner to obtain 3.5 g (41% yield) of SPH55 as a white solid.

MS (MALDI-TOF): m / z 743 [M] ⁺

Known literature for the synthesis of triazine intermediates with various substituents during the synthesis of these materials Dalton Trans. 2008,3567-3573 and Tetrahedron letters 43 (2002) 6783-6786. The methods of known Journal of Organic Chemistryl, 1961, 26 (5), 1509-1511 and Journal of chemical society, 1963, 3097-3099 were also used for indolocarbazole synthesis.

Experimental Example

Fabrication of Organic Light Emitting Diode

The light emitting area of the ITO glass was patterned to have a size of 2 mm x mm and then washed. Board

Is placed in a vacuum chamber and the base pressure is 1x10 ^-6 torr.

DNTPD (700 Å), NPD (300 Å), Compound + Ir (ppy) ₃ prepared according to the present invention

(10%) (300 mW), Alq ₃ (350 mW), LiF (5 mW), Al (1,000 mW) in this order, 0.4

Measurements were made at mA.

Comparative example

The organic light emitting diode device for the comparative example was manufactured in the same manner except for using CBP instead of the compound prepared by the invention in the device structure of the above example.

division Host Dopant Doping concentration% ETL V A Cd / A CIEx CIEy Comparative Example 1 CBP Ir (ppy) 3 10 Alq3 8.20 0.0004 38.81 0.29 0.62 Experimental Example 1 SPH01 Ir (ppy) 3 10 Alq3 7.61 0.0004 48.68 0.31 0.62 Experimental Example 2 SPH03 Ir (ppy) 3 10 Alq3 5.74 0.0004 50.38 0.29 0.62 Experimental Example 3 SPH04 Ir (ppy) 3 10 Alq3 7.49 0.0004 47.08 0.34 0.61 Experimental Example 4 SPH41 Ir (ppy) 3 10 Alq3 6.78 0.0004 45.29 0.35 0.61 Experimental Example 5 SPH55 Ir (ppy) 3 10 Alq3 6.01 0.0004 50.09 0.35 0.61

As shown in the above table, the organic compound obtained by the present invention is a phosphorescent material.

Compared with CBP, which is widely used, the driving voltage is low and luminous efficiency is excellent.

In addition, the performance of the organic field device using the compound according to the present invention is shown in the figure. 2 is a diagram showing the luminance according to the current density among the evaluation results of the experimental example and the comparative example according to the present invention shown in [Table 1].

1A to 1F are cross-sectional views illustrating a laminated structure of organic light emitting diodes according to an exemplary embodiment of the present invention.

2 is a graph showing a change in luminance according to the current density change of the organic light emitting display device for Experimental Examples 1 to 5 and Comparative Example 1 of the present invention.

Claims (11)

delete Aromatic compounds represented by the following formula (2):

(2) Where Ar ₁ and Ar ₂ are each independently an aromatic hydrocarbon group, A ₂ , A ₄ , A ₇ , and A ₉ each independently represent hydrogen, deuterium, halogen, an alkyl group having 1 to 20 carbon atoms, a silyl group having 1 to 20 carbon atoms, an aralkyl group having 6 to 40 carbon atoms, and an alke having 2 to 8 carbon atoms. Nyl group, C2-C8 alkynyl group, cyano group, C6-C40 diarylamino group, C6-C40 diaralkylamino group, C1-C20 alkoxyl group, C1-C20 haloalkyl group, C6-C20 Selected from the group consisting of 40 aromatic hydrocarbon groups or aromatic heterocyclic groups having 3 to 20 carbon atoms, R ₃ to R ₁₂ are each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, a silyl group having 1 to 20 carbon atoms, an aralkyl group having 6 to 40 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkynyl group having 2 to 8 carbon atoms, A cyano group, a diarylamino group of 6 to 40 carbon atoms, a dialkylalkyl group of 6 to 40 carbon atoms, an alkoxyl group of 1 to 20 carbon atoms, a haloalkyl group of 1 to 20 carbon atoms, an aromatic hydrocarbon group of 6 to 40 carbon atoms, or 3 to 20 carbon atoms Is selected from the group consisting of aromatic heterocyclic groups, n and o are integers from 0 to 2, wherein at least one of n and o is an integer of 1 or more. Aromatic compounds represented by the following general formula (3):

(3) Where Ar ₁ and Ar ₃ are each independently an aromatic hydrocarbon group, A ₂ , A ₄ , A ₁₂ , and A ₁₄ are each independently hydrogen, deuterium, halogen, an alkyl group having 1 to 20 carbon atoms, a silyl group having 1 to 20 carbon atoms, an aralkyl group having 6 to 40 carbon atoms, and an alke having 2 to 8 carbon atoms. Nyl group, C2-C8 alkynyl group, cyano group, C6-C40 diarylamino group, C6-C40 diaralkylamino group, C1-C20 alkoxyl group, C1-C20 haloalkyl group, C6-C20 Selected from the group consisting of 40 aromatic hydrocarbon groups or aromatic heterocyclic groups having 3 to 20 carbon atoms, R ₁ , R ₄ to R ₁₂ are each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, a silyl group having 1 to 20 carbon atoms, an aralkyl group having 6 to 40 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, and having 2 to 8 carbon atoms. An alkynyl group, cyano group, a diarylamino group having 6 to 40 carbon atoms, a dialkylalkyl group having 6 to 40 carbon atoms, an alkoxyl group having 1 to 20 carbon atoms, a haloalkyl group having 1 to 20 carbon atoms, an aromatic hydrocarbon group having 6 to 40 carbon atoms or carbon atoms Selected from the group consisting of 3 to 20 aromatic heterocyclic groups, n and p are integers from 0 to 2, wherein at least one of n and p is an integer of 1 or more. Aromatic compounds represented by the following general formula (4):

(4) Where Ar ₁ and Ar ₃ are each independently an aromatic hydrocarbon group, A ₂ , A ₄ , A ₁₂ , and A ₁₄ are each independently hydrogen, deuterium, halogen, an alkyl group having 1 to 20 carbon atoms, a silyl group having 1 to 20 carbon atoms, an aralkyl group having 6 to 40 carbon atoms, and an alke having 2 to 8 carbon atoms. Nyl group, C2-C8 alkynyl group, cyano group, C6-C40 diarylamino group, C6-C40 diaralkylamino group, C1-C20 alkoxyl group, C1-C20 haloalkyl group, C6-C20 Selected from the group consisting of 40 aromatic hydrocarbon groups or aromatic heterocyclic groups having 3 to 20 carbon atoms, R ₁ to R ₂ , R ₅ to R ₁₂ are each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, a silyl group having 1 to 20 carbon atoms, an aralkyl group having 6 to 40 carbon atoms, an alkenyl group having 2 to 8 carbon atoms and 2 carbon atoms An alkynyl group having 5 to 8, a cyano group, a diarylamino group having 6 to 40 carbon atoms, a dialkylalkyl group having 6 to 40 carbon atoms, an alkoxyl group having 1 to 20 carbon atoms, a haloalkyl group having 1 to 20 carbon atoms, and an aromatic hydrocarbon having 6 to 40 carbon atoms. Group or an aromatic heterocyclic group having 3 to 20 carbon atoms, n and p are integers from 0 to 2, wherein at least one of n and p is an integer of 1 or more. 3. The method of claim 2, Any one aromatic compound selected from the group of compounds represented by the formula:

         SPH01 SPH02

         SPH03 SPH04

         SPH05 SPH06

         SPH07 SPH08

         SPH09 SPH10

         SPH11 SPH12

         SPH13 SPH14

         SPH15 SPH16

         SPH17 SPH18

         SPH19 SPH20

         SPH21 SPH22

         SPH23

           SPH41 SPH42

           SPH43 SPH44

           SPH87 SPH88

           SPH89 SPH90

           SPH91 SPH92

           SPH96 SPH97 The method of claim 3, Any one aromatic compound selected from the group of compounds represented by the formula:

       SPH72

           SPH73 SPH74

           SPH75 SPH76

          SPH77

           SPH98 SPH99 5. The method of claim 4, Any one aromatic compound selected from the group of compounds represented by the formula:

           SPH47 SPH48

           SPH49 SPH50

           SPH51 SPH52

           SPH53 SPH54

           SPH55 SPH56

           SPH57 SPH58

           SPH59 SPH60

           SPH61 SPH62

           SPH63 SPH64

           SPH93 SPH94

SPH95 Anode; Cathode; And An organic electroluminescent device comprising a layer interposed between the anode and the cathode and containing the aromatic compound according to any one of claims 2 to 7. The method of claim 8, An organic electroluminescent device further comprising at least one layer selected from the group consisting of a light emitting layer, a hole injection layer, a hole transport layer, a hole blocking layer, an electron transport layer, an electron injection layer and an electron blocking layer between the anode and the cathode. The method of claim 8, The aromatic compound is contained in the light emitting layer between the anode and the cathode. The method of claim 10, The thickness of the light emitting layer is an organic light emitting device, characterized in that 50 to 2,000 kPa.

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