KR101145685B1 - Novel anthracene derivatives and organic electroluminescent device using the same - Google Patents

Abstract

[상기 화학식 1에서, R₁, R₂, R₃, R₄, R₅, R₆, R₇, X 및 Y는 각각 발명의 상세한 설명에서 정의한 바와 같다.]
본 발명에 따른 청색 발광 물질은 발광 재료 뿐만 아니라 청색 형광용 호스트 재료로 사용될 수 있고 또한 유기 전기 발광 소자에 포함되어 색순도, 수명과 효율을 크게 향상시키고, 저전압 구동 및 소자의 안정성을 향상시킬 수 있으므로, 유기 전기 발광 소자의 발광재료 또는 발광 호스트 물질로서 유용하게 활용될 수 있다. The present invention relates to a novel anthracene derivative and an organic light emitting device comprising the same in the light emitting layer. More specifically, the anthracene derivative according to the present invention is represented by the following Chemical Formula 1, and is characterized by being a highly twisted anthracene compound having a symmetry or asymmetry. .
[Formula 1]

[In Formula 1, R ₁ , R ₂ , R ₃ , R ₄ , R ₅ , R ₆ , R ₇ , X and Y are as defined in the detailed description of the invention, respectively.]
The blue light emitting material according to the present invention can be used not only as a luminescent material but also as a host material for blue fluorescence, and can be included in an organic electroluminescent device to greatly improve color purity, lifetime and efficiency, and to improve low voltage driving and stability of the device. It may be usefully used as a light emitting material or a light emitting host material of an organic electroluminescent device.

Description

Anthracene derivatives and organic light emitting device including the same {Novel anthracene derivatives and organic electroluminescent device using the same}

The present invention relates to a novel anthracene derivative and an organic light emitting device comprising the same in the light emitting layer, and more particularly, the anthracene derivative according to the present invention is characterized by being a highly twisted anthracene compound of symmetry or asymmetry.

The flat panel display plays a very important role in supporting a highly visual information society, centered on the internet, which is rapidly growing in recent years. In particular, organic electroluminescent devices (organic EL devices) capable of low voltage driving with self-luminous type have superior viewing angles and contrast ratios compared to liquid crystal displays (LCDs), which are mainstream flat panel displays, and require no backlight. Light weight and thinness are possible, and it has an advantage in terms of power consumption. In addition, the fast response speed and wide color reproduction range have attracted attention as a next generation display device.

In general, an organic EL device is formed on a glass substrate in order of an anode made of a transparent electrode, an organic thin film including a light emitting region, and a metal electrode. In this case, the organic thin film may include a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), or an electron injection layer (electron injection) in addition to the emitting layer (EML). layer, EIL), and may further include an electron blocking layer (EBL) or a hole blocking layer (HBL) due to light emission characteristics of the light emitting layer.

When an electric field is applied to the organic EL device having such a structure, holes are injected from the anode and electrons are injected from the cathode, and the injected holes and electrons are recombined in the emission layer through the hole transport layer and the electron transport layer, respectively, and emit excitons. To form. The light emitting excitation emits light as it transitions to ground states, in which a light emitting layer (guest) is doped into the light emitting layer (host) to increase the efficiency and stability of the light emitting state.

Meanwhile, in 1987, Eastman Kodak Co., Ltd. developed an OLED using a low molecular weight aromatic diamine and an aluminum complex as an emission layer forming material (Appl. Phys. Lett. 51, 913, 1987). On the other hand, as a blue light emitting material, compounds such as diphenylanthracene, tetraphenylbutadiene and distyrylbenzene derivatives have been developed, but are known to have a tendency to crystallize easily due to poor film stability. Idamitsuko-san Co., Ltd. has developed a diphenyl distyryl-based blue light emitting material having improved thin film stability by inhibiting crystallization of phenyl groups on side branches [H. Tikailin, H. Higashi, C. Hosokawa, EP 388,768 (1990), and also developed DPVBi, an aromatic compound having two 2,2-diphenylvinyl groups, arylenevinylene derivatives [Matsuura, M .; Kusumoto, T .; Tokailin, H. US Pat. No. 55,16577, 1996.], Kushu University has developed distyryl anthracene derivatives having improved electron stability and thin film stability by using electron donor and electron donor [PRO. SPIE, 1910, 180 (1993)].

On the other hand, since the blue light emitting compound known to be lower in color purity and luminous efficiency than the light emitting compound of other colors and the thin film stability should be further improved, it is urgent to develop a new blue light emitting material to develop a blue light emitting device or a full-color light emitting device. In addition, since the current blue light emitting material is very expensive at a price of about 200,000 won / g, the development of a low-cost, high-purity blue light emitting material is also urgently required for the development of a large-area total color device. have. For this reason, the necessity for the development of a new blue light emitting compound is gradually increasing.

The present inventors have tried to increase the long-term thermal stability by increasing the rotation barrier compared with the conventional materials to have a high glass transition temperature, and by introducing a high torsional structure and ortho substituents of phenyl groups to minimize the interaction of the anthracene period, solution and solid phase The emission spectrum and the electroluminescence spectrum of were matched to each other, and it was found that a high color purity can be obtained regardless of the substituent of phenyl.

Accordingly, an object of the present invention is to provide an anthracene derivative having high color purity and high luminous efficiency and an organic light emitting device comprising the same as a light emitting material (a blue light emitting material and a blue fluorescent host).

The present invention relates to a novel anthracene derivative and an organic light emitting device comprising the same in the light emitting layer. More specifically, the anthracene derivative according to the present invention is represented by the following Chemical Formula 1, and is characterized by being a highly twisted anthracene compound having a symmetry or asymmetry. .

[Formula 1]

[In Formula 1,

At least one of R ₁ to R ₄ is (C ₁ -C 30) alkyl or (C 6 -C 30) aryl, and the remainder is hydrogen, (C 1 -C 30) alkyl or (C 6 -C 30) aryl;

At least one of R ₅ to R ₈ is (C 1 -C 30) alkyl or (C 6 -C 30) aryl, and the remainder is hydrogen, (C 1 -C 30) alkyl or (C 6 -C 30) aryl;

X and Y are independently of each other hydrogen, (C6-C30) aryl or (C3-C30) heteroaryl, wherein the aryl or heteroaryl of X and Y is (C1-C30) alkyl, (C6-C30) aryl, mono Or di (C1-C30) alkylamino, mono or di (C6-C30) arylamino, phenanthryl, indenyl, acenaphthyl, thienyl, pyridyl, carbazolyl, oxadiazolyl, oxazolyl, triazolyl, May be further substituted with one or more selected from benzothienyl, quinolinyl, isoquinolyl, dibenzofuranyl, thiazolyl or thiadiazolyl.]

The compound of formula 1 of the present invention includes a compound of formula 2 below.

[Formula 2]

[In Formula 2, X and Y are the same as defined in Formula 1, at least one of R ₂ and R ₄ is (C 1 -C 30) alkyl or (C 6 -C 30) aryl, and the rest are hydrogen, (C 1 -C30) alkyl or (C6-C30) aryl, at least one of R ₅ and R ₇ is (C1-C30) alkyl and the remainder is hydrogen, (C1-C30) alkyl or (C6-C30) aryl. ]

X and Y are independently of each other phenyl, biphenyl, naphthyl, fluorenyl, anthracenyl, phenanthryl, indenyl, acenaphthyl, thienyl, pyridyl, carbazolyl, oxadizolyl, oxazolyl, tria Zolyl, benzothienyl, quinolinyl, isoquinolyl, dibenzofuranyl, thiazolyl or thiadiazolyl, wherein X and Y are (C1-C30) alkyl, (C6-C30) aryl, mono or di ( C1-C30) alkylamino, mono or di (C6-C30) arylamino, phenanthryl, indenyl, acenaphthyl, thienyl, pyridyl, carbazolyl, oxadiazolyl, oxazolyl, triazolyl, benzothienyl It may be further substituted with one or more selected from quinolinyl, isoquinolyl, dibenzofuranyl, thiazolyl or thiadiazolyl.

Anthracene derivatives of the present invention may be specifically exemplified as the following compounds, but the following compounds do not limit the present invention.

Anthracene derivatives of the present invention can be prepared, as shown in Scheme 1 below.

Scheme 1

[In Reaction Scheme 1, R ₁ , R ₂ , R ₃ , R ₄ , R ₅ , R ₆ , R ₇ , X and Y are the same as defined in the formula (1).]

The anthracene compound has a highly twisted structure having an anthracene group and a substituent having a high rotational disorder, exhibits a high glass transition temperature, and the anthracene intermolecular interaction is suppressed as much as possible, thereby exhibiting a high color purity emission spectrum. Therefore, the OLED according to the present invention solves the problem of deterioration due to the driving heat generated during driving of the device and the deterioration of the light emission characteristics and the color purity due to the low purity and pi-stacking of the material for forming the organic film. While improving the stability of the device and reducing the intermolecular interference due to strong distortion, it constitutes a high efficiency high color purity electroluminescent device.

The anthracene derivative of Chemical Formula 1 according to the present invention may be used as a light emitting layer material of an organic light emitting device, and may also be used as a host material of a known blue light emitting compound.

The present invention provides an organic electroluminescent device, and the organic light emitting device according to the present invention comprises an organic electroluminescent device comprising a light emitting layer between an anode, a cathode and a positive electrode, comprising a compound of formula 1 in the light emitting layer An anthracene derivative is used as a light emitting material and a host material.

The anthracene derivative according to the present invention has a highly twisted structure having a high rotational disturbance of an anthracene group and a substituent, and exhibits a high glass transition temperature, and an anthracene intermolecular interaction is suppressed as much as possible, thereby exhibiting a high color purity emission spectrum. Therefore, the OLED formed with the organic layer such as the light emitting layer using the anthracene derivative according to the present invention has the problem of deterioration due to the driving heat generated when driving the device and the light emission due to the low purity and pi-stacking of the material for forming the organic film. By solving the problem of deterioration of characteristics and reduction of color purity, the luminous efficiency is improved, the stability of the device is improved, and the reason why the intermolecular interference due to the strong distortion is reduced can be configured a high efficiency high color electroluminescent device. In addition, the anthracene derivative according to the present invention can be used as a host material of a conventionally known blue fluorescent material. The OLED of the present invention can realize excellent pure blue color purity.

Figure 1-Thermogravimetric analysis (TGA) of the anthracene derivative BDNPAn prepared in Preparation Example 1
Figure 2-Differential calorimetry (DSC) of the anthracene derivative BDNPAn prepared in Preparation Example 1
3-Graph showing the UV absorption and PL spectrum in the liquid state and the PL spectrum in the solid state of the anthracene derivative BDNPAn prepared in Preparation Example 1
4-Cyclic voltammetry curve of the anthracene derivative BDNPAn prepared in Preparation Example 1
5-Structure of organic electroluminescent device [ITO / HTL / Compound 1 (40 nm) / Bphen (10 nm) / LiF / Al]
6-Graph showing current-voltage-luminance characteristics of devices of Example 1, Comparative Examples A, B and C
7-Graph showing External Quantum Efficiency according to the current of devices of Example 1, Comparative Examples A, B and C
8-Graph showing normalized EL and color coordinates of devices of Example 1, Comparative Examples A, B, and C
Figure 9-Structure of organic electroluminescent device [ITO / HTL-ETL / Compound 1: BCzVBi (40 nm, 5%) / Bphen / LiF / Al]
10-Graph showing current-voltage-luminance characteristics of devices of Example 2, Comparative Examples D, E, and F
11-Graph showing External Quantum Efficiency according to the current of devices of Example 2, Comparative Examples D, E and F
12-Graph showing normalized EL and color coordinates of devices of Example 2, Comparative Examples D, E, and F

Hereinafter, an anthracene derivative according to the present invention, a method for preparing the same, and a luminescent property of a device are described for the detailed understanding of the present invention, but only for the purpose of illustrating the embodiments of the present invention. It does not limit the scope of.

Preparation Example 1 Preparation of Compound 1

Preparation of Compound A

10 g (48.0 mmol) of anthraquinone and 380 mL of THF were added to a 1000 mL 2-neck flask and refluxed (Flask I). Then, 28 g (105.7 mmol) of 2,5-dibromo-p-xylene and 230 mL of THF were added to a 500 mL 3-neck flask where water was completely removed, and the temperature was lowered to -78 ° C. 38.4 mL of 2.5 M n-BuLi. (96.1 mmol) is slowly added dropwise over 10 minutes. Stir for 1 hour (flask II). The reactant from flask II is drawn into a syringe I by syringe. Stir for 12 hours. 400 ml of saturated ammonium chloride is added to terminate the reaction. Filter and wash several times with methylene chloride and dry to afford Compound A (white solid, yield 80%).

Preparation of Compound B

24 g (41.5 mmol) of Compound A were added to a 1000 mL 2-neck flask with 44.0 g (415.2 mmol) of NaH ₂ PO ₄ H ₂ O and 20.7 g (124.56 mmol) of KI, followed by adding 500 mL of acetic acid and stirring for 6 hours. Add water to terminate the reaction, filter and rinse with water several times. Soxhlet with hexane and remove solvent to afford compound B (green solid, 23.1 g, 88.5%).

Tm = 320 ° C. ¹ H NMR (300 MHz, CDCl ₃ ): δ = 7.64 (s, 2H), 7.53-7.56 (m, 4H), 7.32-7.37 (m, 4H), 7.17-7.20 (d, 2H), 2.45 (s , 6H), 1.85 (s, 6H) ppm. FTIR (KBr): ν = 3055, 2945, 2915 (aromatic and vinyl CH str), 1596, 1481, 1438 (aromatic C = C str), 1108, 969, 748 (C-Br str).

Preparation of Compound 1

In a 250 mL 2-neck flask, 5 g (9.2 mmol) of Compound B and 7.12 g (41.4 mmol) of naphthalen-2-ylboronic acid were added, 100 mL of toluene, 20 mL of 2 MK ₂ CO _3, and 20 mL of THF were added. Thereafter, nitrogen was bubbled for 30 minutes to remove oxygen in the solvent. After the temperature was raised to 40 ° C. to 50 ° C., 0.32 g (3 mol%) of tetrakis (triphenylphosphine) palladium (0) was added thereto, and the mixture was stirred at 110 ° C. under nitrogen gas for 48 hours. After the temperature has cooled to room temperature, the reaction is terminated using 200 mL of 2 N-HCl. Filter, wash several times with chloroform and dry. The dried material was soxhlet with toluene to give compound 1 (white solid, 4.2 g, 71.6%).

Td> 390 ° C. ¹ H NMR (300 MHz, CDCl ₃ ): δ = 7.94-7.99 (m, 8H), 7.73-7.72 (m, 6H), 7.54-7.56 (m, 4H), 7.39-7.44 (d, 6H), 7.26 ˜7.28 (d, 2H), 2.39 (s, 6H), 1.97 (s, 6H) ppm. EIMS (m / z): [M ⁺ ] calcd for C ₅₀ H ₃₈ , 638.30; found, 638. FTIR (KBr): ν = 3051, 2918 (aromatic and vinyl CH str), 1596, 1501 (aromatic C = C str).

Preparation Example 2 Preparation of Compound 2

In a 250 mL 2-neck flask, 5.7 g (10.5 mmol) of Compound B and 5.74 g (47.1 mmol) of phenylboronic acid were added, 100 mL of toluene, 20 mL of 2 MK ₂ CO ₃ , 20 mL of THF and tetrakis (tri 0.4 g (3 mol%) of phenylphosphine) palladium (0) was added thereto, and the same procedure as in Preparation Example 1 was carried out to obtain Compound 2 (white solid, 2.9 g, 42.4%).

Td> 358 ° C. ¹ H NMR (300 MHz, CDCl ₃ ): δ = 7.74-7.71 (m, 4H), 7.49-7.57 (m, 8H), 7.39-7.44 (m, 6H), 7.35 (s, 2H), 2.36 (s , 6H), 1.95 (s, 6H). EIMS (m / z): [M ⁺ ] calcd for C ₆₀ H ₅₀ , 538.27; found, 538. FTIR (KBr): ν = 3055, 3002, 2918 (aromatic and vinyl CH str), 1598, 1485 (aromatic C = C str).

Preparation Example 3 Preparation of Compound 3

5.0 g (9.2 mmol) of Compound B and 2- (9,9-dimethyl-9H-fluoren-2-yl) -4,4,5,5-tetramethyl-1,3 in a 250 mL 2-neck flask 12.0 g (41.3 mmol) of 2,2-dioxaborolane, 100 mL of toluene, 20 mL of 2 MK ₂ CO ₃ , 20 mL of THF, and 0.3 g of tetrakis (triphenylphosphine) palladium (0) mol%) was added and experimented in the same manner as in Preparation Example 1 to obtain Compound 3 (green solid, 2.8 g, 40%).

Td> 443 ° C. ¹ H NMR (300 MHz, CDCl ₃ ): δ = 7.74-7.88 (m, 8H), 7.62 (d, 2H), 7.54-7.56 (m, 4H), 7.52 (m, 4H), 7.38-7.43 (m , 12H), 2.42 (s, 6H), 1.98 (s, 6H), 1.61 (s, 12H) ppm. EIMS (m / z): [M ⁺ ] calcd for C ₆₀ H ₅₀ , 770.39; found, 770. FTIR (KBr): ν = 3056, 3008, 2953 (aromatic and vinyl CH str), 1443 (aromatic C = C str).

[Examples and Comparative Examples] Fabrication of an organic electroluminescent device using the anthracene derivative of the present invention

First, the transparent electrode ITO thin film (15 Ω / □) obtained from the glass for OLED was subjected to ultrasonic cleaning using trichloroethylene, acetone, ethanol, and distilled water in sequence, and then stored in isopropanol and used. When 1,1'-bis [(di-4-tolylamino) phenyl] cyclohexane (TAPC) was deposited on the ITO thin film to form a hole transport layer of 50 nm (1-Example), 4,4 ' In the case of depositing, 4 "-tris (N, N- (2-naphthyl) -phenylamino) triphenylamine (2-TNATA) to form a hole injection layer of 80 nm and a hole transport layer of NPB 20 nm ( 2-Comparative Example A) When NPB 50 nm was used as the hole transport layer (3-Comparative Example B), when the NPB 40 nm hole injection layer and TcTa 10 nm were formed as the hole transport layer (4-Comparative Example C) For each, thereafter, compound 1 of the present invention was deposited 40 nm into the light emitting layer, and then Bphen was deposited to a thickness of 10 nm into the electron transporting layer, and then the compound lithium fluoride (LiF) having the following structure as the electron injection layer. Was deposited at a thickness of 1 nm, and Al was deposited on the electron injection layer to form a cathode of 100 nm, thereby manufacturing an organic electroluminescent device according to the present invention.

The organic electroluminescent device 1 of Example 1 prepared is [ITO / TAPC (50 nm) / Compound 1 (40 nm) / Bphen (10 nm) / LiF (1 nm) / Al (100 nm)] Has a stacked structure,

The organic electroluminescent device 2 of Comparative Example A is [ITO / TNATA (80 nm) / NPB (20 nm) / Compound 1 (40 nm) / Bphen (10 nm) / LiF (1 nm) / Al (100 nm)] The organic EL light emitting device 3 of Comparative Example B was obtained by sequentially stacking from below, [ITO / NPB (50 nm) / Compound 1 (40 nm) / Bphen (10 nm) / LiF (1 nm) / Al (100 nm)] is laminated in order from the bottom, the organic electroluminescent device 4 of Comparative Example C is [ITO / NPB (40 nm) / TcTa (10 nm) / Compound 1 (40 nm) / Bphen (10 nm) / LiF (1 nm) / Al (100 nm)] have a laminated structure.

The results of evaluating the current-voltage, luminance-voltage, and color characteristics of the device fabricated in Example 1 and the devices fabricated in Comparative Examples A, B, and C (FIG. 5) are shown in FIGS. As a result, the color coordinates showed excellent color purity of 0.159, 0.058 to deep blue, and the maximum efficiency was 5.26% @ 5.7.

In addition, when Compound 1 of the present invention was used as a host and BCzVBi, known as a dopant, to form a light emitting layer (FIG. 9), that is, the organic electroluminescent device 1 of Example 2 was made of [ITO / NPB (50 nm)-Bphen ( 10 nm) / Compound 1: BCzVBi (40 nm, 5%) / Bphen (10 nm) / LiF (1 nm) / Al (100 nm)] has a structure laminated in order from the bottom, The organic electroluminescent device 2 is composed of [ITO / NPB (50 nm)-Bphen (30 nm) / Compound 1: BCzVBi (40 nm, 5%) / Bphen (10 nm) / LiF (1 nm) / Al (100 nm) ] Is laminated in order from below, and the organic electroluminescent device 3 of Comparative Example E has [ITO / NPB (40 nm) / TcTa (10 nm)-Bphen (10 nm) / compound 1: BCzVBi (40 nm, 5) %) / Bphen (10 nm) / LiF (1 nm) / Al (100 nm)] laminated in order from below, the organic electroluminescent device 4 of Comparative Example F is [ITO / NPB (40 nm) / TcTa (10 nm)-Bphen (30 nm) / Compound 1: BCzVBi (40 nm, 5%) / Bphen (10 nm) / LiF (1 nm) / Al (100 nm)] The current-voltage, luminance-voltage and color characteristics of the stacked structure The results of the evaluation are shown in FIGS. 10 to 12, and excellent color purity of 0.148 and 0.10 and maximum luminous efficiency of 6.8% showed excellent luminous efficiency.

Of the anthracene derivatives of the present invention Thermal properties  evaluation

Thermogravimetric properties of the anthracene derivatives BDNPAn (preparation example 1), BDPAn (preparation example 2) and BDFAn (preparation example 3) prepared above were heated by heating at 40 ° C. to 700 ° C. at 10 ° C. per minute in a nitrogen atmosphere. It was investigated by analysis (TGA) and differential calorimetry (DSC), and the results of BDNPAn (Production Example 1) are shown in FIGS. 1 and 2. In the case of the anthracene derivatives BDNPAn (Preparation Example 1), BDPAn (Preparation Example 2) and BDFAn (Preparation Example 3), the 5% weight loss was measured at 390 ° C., 358 ° C. and 443 ° C., respectively. It can be seen that the anthracene derivatives have very good thermal stability.

Properties of Anthracene Derivatives of the Invention

In order to evaluate the properties of the anthracene derivative prepared above, the PL spectrum of BDNPAn (Preparation Example 1) is shown in FIG. 3. The PL maximum peaks in the PL spectrum were 431 nm (solution) and 431 nm (solid). In addition, the PL maximum peaks of BDPAn (Production Example 2) and BDFAn (Production Example 3) were 431 nm, 431 nm (solution), and 426, 442 nm (solid), respectively.

Evaluation of Electrochemical Properties of Anthracene Derivatives According to the Present Invention

Electrochemical properties of the anthracene derivative BDNPAn prepared in Preparation Example 1 were measured by cyclic voltammetry, and the results are shown in FIG. 4. The synthesized anthracene derivative BDNPAn had a HOMO of 5.59 eV, a LUMO of 2.55 eV, and a bandgap of 3.04. In addition, the HOMO of anthracene derivative BDPAn (Preparation Example 2) was 5.58 eV, LUMO was 2.48 eV, the bandgap was measured at 3.1, HOMO of anthracene derivative BDFAn (Preparation Example 3) was 5.60 eV, and LUMO was 2.58. eV, and the bandgap was measured at 3.02.

Claims (6)

Anthracene derivative represented by the following formula (1).
[Formula 1]

[In the above formula (1)
At least one of R ₁ to R ₄ is (C ₁ -C 30) alkyl or (C 6 -C 30) aryl, and the remainder is hydrogen, (C 1 -C 30) alkyl or (C 6 -C 30) aryl;
At least one of R ₅ to R ₈ is (C 1 -C 30) alkyl or (C 6 -C 30) aryl, and the remainder is hydrogen, (C 1 -C 30) alkyl or (C 6 -C 30) aryl;
X and Y independently of one another are phenyl, biphenyl, naphthyl, fluorenyl, anthracenyl, phenanthryl, indenyl, acenaphthyl, thienyl, pyridyl, carbazolyl, oxadiazolyl, oxazolyl, triazolyl , Benzothienyl, quinolinyl, isoquinolyl, dibenzofuranyl, thiazolyl or thiadiazolyl, wherein X and Y are (C1-C30) alkyl, (C6-C30) aryl, mono or di (C1) -C30) alkylamino, mono or di (C6-C30) arylamino, phenanthryl, indenyl, acenaphthyl, thienyl, pyridyl, carbazolyl, oxadiazolyl, oxazolyl, triazolyl, benzothienyl, And may be further substituted with one or more selected from quinolinyl, isoquinolyl, dibenzofuranyl, thiazolyl or thiadiazolyl.]
The method of claim 1,
Anthracene derivative represented by the following formula (2).
(2)

[In Formula 2, X and Y are independently of each other phenyl, biphenyl, naphthyl, fluorenyl, anthracenyl, phenanthryl, indenyl, acenaphthyl, thienyl, pyridyl, carbazolyl, oxadizolyl , Oxazolyl, triazolyl, benzothienyl, quinolinyl, isoquinolyl, dibenzofuranyl, thiazolyl or thiadiazolyl, wherein X and Y are (C1-C30) alkyl, (C6-C30) aryl , Mono or di (C1-C30) alkylamino, mono or di (C6-C30) arylamino, phenanthryl, indenyl, acenaphthyl, thienyl, pyridyl, carbazolyl, oxadiazolyl, oxazolyl, tria May be further substituted with one or more selected from zolyl, benzothienyl, quinolinyl, isoquinolyl, dibenzofuranyl, thiazolyl or thiadiazolyl, and at least one of R ₂ and R ₄ is (C1-C30). ) Alkyl or (C6-C30) aryl, the remainder is hydrogen, (C1-C30) alkyl or (C6-C30) aryl, at least one of R ₅ and R ₇ The phase is (C1-C30) alkyl and the remainder is hydrogen, (C1-C30) alkyl or (C6-C30) aryl.]
delete The method of claim 2,
Anthracene derivative selected from the following compounds.

An organic light emitting device comprising a light emitting layer between an anode, a cathode and a positive electrode, wherein the organic light emitting device comprises the anthracene derivative according to any one of claims 1, 2 and 4 in the light emitting layer.
6. The method of claim 5,
The anthracene derivative is an organic light emitting device, characterized in that used as a host material.

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