KR20160049923A - Organic electroluminescent compound, ink composition, organic electroluminescent device and electric apparatus - Google Patents

Abstract

The present invention provides an organic light emitting compound represented by chemical formula 1. The organic light emitting compound has electrochemical stability and thermal stability. In the chemical formula 1, Ar^1, Ar^2, L^1, L^2, Ra, Rb, n and m are the same as defined in the detailed description.

Description

TECHNICAL FIELD [0001] The present invention relates to an organic electroluminescent compound, an ink composition, an organic light emitting device, and an electronic device.

An organic light-emitting compound, an ink composition, an organic light-emitting device including the same, and an electronic apparatus.

An electroluminescence device (EL device) is a self-emissive type display device having a high response speed and a wide viewing angle. In 1987, Eastman Kodak Company first developed an organic EL device using a low molecular aromatic diamine and an aluminum complex as a light emitting layer material [Appl. Phys. Lett. 51, 913, 1987].

The most important factor for determining the luminous efficiency in an OLED is a luminescent material, and a phosphorescent material in a luminescent material can improve luminous efficiency up to 4 times the theoretical value of a fluorescent material. Until now, iridium (III) complexes and carbazole-based materials have been widely known as phosphorescent materials, and new phosphorescent materials are being studied in recent years.

The principle of the organic electroluminescent phenomenon is that when a voltage is applied between two electrodes when an organic material layer exists between the cathode and the anode, electrons and holes are injected into the organic material layer from the cathode and the anode, respectively. Electrons and holes injected into the organic layer are recombined to form an exciton, and the exciton falls back to the ground state to emit light. An organic light emitting device using such a principle may be generally composed of an organic material layer including a cathode, an anode and an organic material layer disposed therebetween, for example, a hole injecting layer, a hole transporting layer, a light emitting layer, and an electron transporting layer.

As materials used in organic light emitting devices, pure organic materials or complexes in which an organic material and a metal form a complex are mostly used, and they are classified into a hole injecting material, a hole transporting material, a light emitting material, an electron transporting material, . As the hole injecting material and the hole transporting material, an organic material having a p-type property, that is, an organic material which is easily oxidized and electrochemically stable at the time of oxidation, is mainly used. On the other hand, as an electron injecting material and an electron transporting material, an organic material having an n-type property, that is, an organic material which is easily reduced and electrochemically stable at the time of reduction is mainly used. As the light emitting layer material, a material having both a p-type property and an n-type property, that is, a material having both a stable state in oxidation and in a reduced state is preferable, and a material having a high luminous efficiency for converting an exciton into light desirable. Accordingly, there is a need in the art to develop new organic materials having the above-described requirements.

One embodiment of the present invention provides novel organic electroluminescent compounds having appropriate energy levels, electrochemical stability, and thermal stability.

Another embodiment of the present invention provides an ink composition comprising the organic luminescent compound.

Another embodiment of the present invention provides an organic light emitting device comprising the organic light emitting compound.

Another embodiment of the present invention provides an electronic apparatus to which the organic light emitting device is applied.

In one embodiment of the present invention, there is provided an organic luminescent compound represented by the following general formula (1).

≪ Formula 1 >

In this formula,

Ar ¹ and Ar ² each independently represent a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C3-C60 heteroaryl group, a substituted or unsubstituted C3-C60 cycloalkyl group, a substituted or unsubstituted C6- (R2), -P (O) (R3) (R4) or? I (R5) (R6) (R7), and R1, R2, R3, R4, R5, R6 and R7 are each independently a C6-C50 aryl group or a C3-C50 heteroaryl group,

The substituent when Ar ¹ and Ar ² are substituted is selected from the group consisting of deuterium, fluorine, a C 1 -C 30 alkyl group, a C 6 -C 30 aryl group, a C 2 -C 30 heteroaryl group, a C 1 -C 30 alkoxy group, a C 1 -C 30 fluoro The alkyl group, -Si (CH _{3) 3,} and -CN one selected from the group consisting of a;

L ¹ and L ² each independently represent a single bond, a substituted or unsubstituted C6-C60 arylene group, a substituted or unsubstituted C3-C60 heteroarylene group, a substituted or unsubstituted C3-C60 cycloalkyl A substituted or unsubstituted C2-C60 heterocycloalkylene group, and combinations thereof;

The substituent when L ¹ and L ² are substituted is at least one selected from the group consisting of a C 1 -C 20 alkyl group and a C 3 -C 20 aryl group;

Ra and Rb each independently represent a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C3-C60 heteroaryl group, a substituted or unsubstituted C3-C60 cycloalkyl group, a substituted or unsubstituted R 2, R 3, R 4 and R 6 are the same or different and each represents a hydrogen atom, a substituted or unsubstituted C2-C60 heterocycloalkyl group, -N (R1) (R2) R4, R5, R6 and R7 are each independently a C6-C50 aryl group or a C3-C50 heteroaryl group,

The substituent when Ra and Rb are substituted is a C1-C30 alkyl group or a C1-C30 alkoxy group;

n and m are each independently an integer of 0 to 4;

In another embodiment of the present invention, there is provided an ink composition comprising at least one of the organic luminescent compounds.

According to another embodiment of the present invention, there is provided an organic light emitting device comprising a structure in which a first electrode, at least one organic material layer and a second electrode are stacked, and the organic material layer includes at least one organic light emitting compound.

In another embodiment of the present invention, there is provided an electronic device including the organic light emitting device.

The organic luminescent compound can satisfactorily satisfy the conditions required for a material usable in an organic light emitting device, for example, suitable energy level, electrochemical stability, and thermal stability. can do.

Fig. 1 shows the 1H-NMR measurement results of the compound [5] prepared in the examples.
Figure 2 is a thermogravimetric analysis (TGA) graph for the compound [5] prepared in the Examples.
Figure 3 is a graph of differential scanning calorimetry (DSC) measurements for the compound [5] prepared in the examples.
Figure 4 is the UV absorption spectrum for the compound [5] prepared in the examples.
FIG. 5 is a graph showing the photoluminescence (PL) measurement of the compound [5] to be.

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited thereto, and the present invention is only defined by the scope of the following claims.

Unless defined otherwise, the term "substituted" in the present specification means a C1-C50 alkyl group, a C3-C50 cycloalkyl group, a C2-C50 alkenyl group, a C3-C50 cycloalkenyl group, a C2-C50 alkynyl group , A C5-C50 cycloalkynyl group, a cyano group, a C1-C20 alkoxy group, a C6-C60 aryl group, a C7-C60 arylalkyl group, and combinations thereof.

In the present specification, the term "combination thereof" means that two or more substituents are bonded to each other via a linking group or two or more substituents are condensed and bonded.

In the present specification, "*" means the same or different atom or part connected to a chemical formula.

"Hetero" as used herein, unless otherwise defined, means containing a heteroatom in one compound or substituent, wherein the heteroatom is selected from the group consisting of N, O, S, P, Lt; / RTI > For example, it may mean one to three heteroatoms in the one compound or substituent, and the remainder is carbon.

In one embodiment of the present invention, there is provided a novel organic luminescent compound represented by the following general formula (1).

≪ Formula 1 >

In this formula,

Ar ¹ and Ar ² each independently represent a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C3-C60 heteroaryl group, a substituted or unsubstituted C3-C60 cycloalkyl group, a substituted or unsubstituted C6- (R2), -P (O) (R3) (R4) or? I (R5) (R6) (R7), and R1, R2, R3, R4, R5, R6 and R7 are each independently a C6-C50 aryl group or a C3-C50 heteroaryl group,

The substituent when Ar ¹ and Ar ² are substituted is selected from the group consisting of deuterium, fluorine, a C 1 -C 30 alkyl group, a C 6 -C 30 aryl group, a C 2 -C 30 heteroaryl group, a C 1 -C 30 alkoxy group, a C 1 -C 30 fluoro The alkyl group, -Si (CH _{3) 3,} and -CN one selected from the group consisting of a;

L ¹ and L ² each independently represent a single bond, a substituted or unsubstituted C6-C60 arylene group, a substituted or unsubstituted C3-C60 heteroarylene group, a substituted or unsubstituted C3-C60 cycloalkyl A substituted or unsubstituted C2-C60 heterocycloalkylene group, and combinations thereof;

The substituent when L ¹ and L ² are substituted is at least one selected from the group consisting of a C 1 -C 20 alkyl group and a C 3 -C 20 aryl group;

Ra and Rb each independently represent a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C3-C60 heteroaryl group, a substituted or unsubstituted C3-C60 cycloalkyl group, a substituted or unsubstituted R 2, R 3, R 4 and R 6 are the same or different and each represents a hydrogen atom, a substituted or unsubstituted C2-C60 heterocycloalkyl group, -N (R1) (R2) R4, R5, R6 and R7 are each independently a C6-C50 aryl group or a C3-C50 heteroaryl group,

The substituent when Ra and Rb are substituted is a C1-C30 alkyl group or a C1-C30 alkoxy group;

n and m are each independently an integer of 0 to 4;

The organic luminescent compound is, specifically,

,

,

,

,

,

,

,

, 3원 내지 6원환의 고리가 2 내지 5개 융합되거나, 축합되거나 또는 스피로 구조로 연결된 C6-C60의 고리기 및 이들의 조합으로 이루어진 군으로부터 선택된 하나이고, 상기 3원 내지 6원환의 고리는 지환족 또는 방향족고리일 수 있으며 헤테로원자를 포함하거나 포함하지 않을 수 있고, Ar ¹ and Ar ² each independently represent a phenyl group, a cyclohexane group,

,

,

,

,

,

,

,

, A C6-C60 ring group fused with 2 to 5 rings of 3 to 6 member rings, condensed or linked to a spiro structure, and combinations thereof, and the ring of the 3-membered to 6-membered rings is Alicyclic or aromatic ring, which may or may not contain a heteroatom,

The hydrogen atoms in Ar ¹ and Ar ² as defined above are substituted or unsubstituted with a C1-C30 alkyl group or a C6-C30 aryl group;

, 또는 3원 내지 6원환의 고리가 2 내지 5개 융합되거나, 축합되거나 또는 스피로 구조로 연결된 C6-C60의 2가 고리기이고, 상기 3원 내지 6원환의 고리는 지환족 또는 방향족 고리일 수 있으며 헤테로원자를 포함하거나 포함하지 않을 수 있고,L ¹ and L ² each independently represent a single bond, a biphenylene, a C 1 -C 20 alkyl group or a phenylene group substituted or unsubstituted with 332,

Or a C6-C60 divalent cyclic group in which 2 to 5 rings of 3 to 6 member rings are fused, condensed or linked in a spiro structure, and the ring of the 3-membered to 6-membered rings may be an alicyclic or aromatic ring And may or may not include a heteroatom,

The hydrogen atoms in L ¹ and L ² defined above may be substituted or unsubstituted with a phenyl group.

In one embodiment, in Formula 1, at least one of -L ¹ -Ar ¹ and -L ² -Ar ² may be any of the groups represented by the following structural formulas.

For example, the organic luminescent compound may be any one of compounds 1 to 334 described in Table 1 below.

In another embodiment of the present invention, there is provided an ink composition comprising at least one of the organic luminescent compounds.

The ink composition may be a solution or suspension comprising a solvent, which may be, for example, anisole, dimethyl anisole, xylene, o-xylene, m-xylene, p-xylene, toluene, , Methyl benzoate, dioxane, terahydrofuran, methyl tetrahydrofuran, tetrahydropyran, tetralin, veratrol, chlorobenzene, N-methylpyrrolidone, N, N-dimethylformamide, dimethylsulfoxide and And combinations thereof.

The organic compound layer can be formed by applying the ink composition and removing the solvent to form a film.

The ink composition may further comprise a pigment or a dye.

The ink composition may further comprise a phosphorescent dopant or a fluorescent dopant.

According to another embodiment of the present invention, there is provided an organic light emitting device comprising a structure in which a first electrode, at least one organic material layer and a second electrode are stacked, and the organic material layer includes at least one organic light emitting compound.

The organic light emitting compound contained in the organic material layer of the organic light emitting device is a compound represented by the general formula (1), and a detailed description thereof is as described above.

The organic material layer may be produced by a known manufacturing method of forming or laminating an organic thin film layer, or the organic material layer may be prepared by a solution process using the ink composition as described above.

In one embodiment, the organic layer may include a light emitting layer, the light emitting layer may include the organic light emitting compound, and the organic light emitting compound may be included as a phosphorescent host, a fluorescent host, a phosphorescent dopant, or a fluorescent dopant material in the light emitting layer .

The light emitting layer may further include a phosphorescent host, a fluorescent host, a phosphorescent dopant, or a fluorescent dopant material of a known material, in addition to the compound represented by the general formula (1).

The organic material layer may suitably include at least one selected from the group consisting of a hole transporting layer, a hole injecting layer, a hole blocking layer, an electron transporting layer, an electron injecting layer, and an electron blocking layer,

The hole transporting layer, the hole injecting layer, the hole blocking layer, the electron transporting layer, the electron injecting layer, and the electron blocking layer may each be formed using a known material or may include one or more organic electroluminescent compounds represented by Formula 1 .

In another embodiment of the present invention, there is provided an electronic device including the organic light emitting device.

The organic light emitting device can be applied to various applications. For example, the electronic device to which the organic light emitting device is applied may include an organic integrated circuit (O-IC), an organic field effect transistor (O-FET), an organic thin film transistor (O- ), An organic photovoltaic cell (O-SC), an organic optical detector, an organic photoreceptor, an organic field-quench device (O-FQD), a luminescent electrochemical cell (LEC), an organic laser diode (OLED).

Hereinafter, examples and comparative examples of the present invention will be described. The following embodiments are only examples of the present invention, and the present invention is not limited to the following embodiments.

( Example )

Hereinafter, the reaction examples and the comparative examples are specifically exemplified, but the present invention is not limited to the following synthesis examples and examples. In the following reaction examples, the intermediate compounds are indicated by adding the serial number to the final product number. For example, Compound 1 is represented by the compound [1], and the intermediate compound of the above compound is represented by [1-1] or the like. In the present specification, the numbers of the compounds are represented by the numbers of the formulas shown in Table 1 above. For example, compounds designated 1 in Table 1 are designated Compound 1.

Synthetic example  1: Preparation of compound [5]

[Reaction Scheme 1]

Preparation of intermediate compound [5-2]

In a 2 L reaction flask, 16.1 g (108.58 mmol) of the compound [5-1] was dissolved in 500 ml of dichloromethane in a nitrogen atmosphere, 28.9 g (217.17 mmol) of aluminum chloride was added thereto and stirred for 30 minutes and dibenzo-1,4- 20.0g (108.58mmol) was added dropwise. After completion of the reaction, the reaction mixture was added dropwise to ice water, and then dichloromethane (100 mL) was added thereto. The mixture was extracted with water and dried over anhydrous magnesium sulfate. The filtrate was concentrated under reduced pressure, dissolved in dichloromethane (100 mL) and recrystallized with hexane. Filtration afforded 34.6 g (96%) of the intermediate compound [5-2] as a light yellow solid.

Preparation of intermediate compound [5-3]

In a 500 mL reaction flask, 34.6 g (104.12 mmol) of the intermediate compound [5-2] was dissolved in polyphosphoric acid in a nitrogen atmosphere, and the mixture was heated and stirred at 100 ° C. After completion of the reaction, the reaction solution was added dropwise to ice water, stirred for 1 hour, and filtered under reduced pressure. Thereafter, 300 ml of acetone and 1.5 L of distilled water were added to the solid, stirred, and then filtered under reduced pressure. The solid was refluxed in 600 ml of acetone and then filtered under reduced pressure to obtain 28.8 g (88%) of an intermediate compound [5-3] as a brown solid.

Preparation of intermediate compound [5-5]

In a 1 L reaction flask, 49.3 g (238.25 mmol) of the compound [5-4] was dissolved in 500 mL of anhydrous tetrahydrofuran, and the mixture was stirred at -78 ° C. 95.3 mL (238.25 mmol) of n-butyllithium (2.5 M in hexane) was added dropwise at the same temperature, and after 30 minutes, 28.8 g (91.63 mmol) of the intermediate compound [5-3] was added. The reaction mixture was heated to room temperature, extracted with ethyl acetate and saturated aqueous ammonium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under reduced pressure and then purified by silica gel chromatography to obtain a light yellow solid intermediate compound [5-5] 24.2g (40%) was prepared.

Preparation of compound [5]

24.2 g (42.4 mmol) of the intermediate compound [5-5], 28.2 g (169.63 mmol) of potassium iodide and 36.0 g (169.63 mmol) of sodium diphosphate monohydrate were placed in a 500 mL reaction flask and 200 mL of acetic acid was added. The reaction temperature is cooled to room temperature and the resulting solid is filtered. 200 ml of acetone and 800 ml of distilled water were added to the filtered solid, which was stirred for 1 hour and then filtered under reduced pressure. The filtered solid was recrystallized from toluene to give 8.4 g (37%) of the desired compound [5] as a pale yellow solid.

^{1 H NMR (400 MHz, THF} -d 8): δ 8.18 (d, 2H), 8.10 ~ 7.99 (m, 6H), 7.66 ~ 7.61 (m, 8H), 7.29 ~ 7.27 (m, 2H), 7.12 ( s, 2H), 6.94 ~ 6.84 (m, 4H)

MS / FAB: 536 (M ^< ^{+ &} gt ^; ).

1 is a ¹ H-NMR spectrum of the obtained compound [5].

FIG. 2 is a thermogravimetric analysis (TGA) graph for the obtained compound [5].

FIG. 3 is a graph of differential scanning calorimetry (DSC) measurement for the obtained compound [5].

4 is a UV absorption spectrum of the obtained compound [5].

5 is a graph showing the photoluminescence (PL) measurement of the obtained compound [5] to be.

Synthetic example  2: Preparation of compound [54]

[Reaction Scheme 2]

Preparation of intermediate compound [54-1]

600 ml of diethyl glycol was added to 30 ml (90.28 mmol) of compound [5-2], 59.1 g (902.77 mmol) of zinc and 36.1 g (902.77 mmol) of sodium hydroxide in a 1 L reaction flask and the mixture was refluxed and stirred at 160 ° C for 24 hours. After completion of the reaction, the reaction solution was slowly poured into 100 ml of distilled water, 36% hydrochloric acid was added dropwise thereto to adjust the pH to 1-2, and the mixture was stirred at room temperature for 1 hour. The resulting solid was dissolved in dichloromethane and then separated and purified by silica gel chromatography to obtain 17.5 g (61%) of an intermediate compound [54-1] as a off-white solid.

Preparation of intermediate compound [54-2]

100 ml of methanesulfonic acid was added to 17.5 g (54.98 mmol) of the compound [54-1] in a 500 ml reaction flask, and the mixture was stirred at room temperature for 1 hour in a nitrogen atmosphere. Then, the reactor temperature was slowly raised to 100 DEG C and then stirred for 24 hours. After completion of the reaction, pour the reaction solution slowly into 100 ml of distilled water, stir at room temperature for 1 hour, extract with dichloromethane, dry with anhydrous magnesium sulfate and filter. The filtrate was concentrated under reduced pressure and then purified by silica gel chromatography to obtain 7.8 g (47%) of an intermediate compound [54-2] as a off-white solid.

Preparation of intermediate compound [54-4]

Into a 500 ml reaction flask, 100 ml of tetrahydrofuran was added to 7.8 g (25.97 mmol) of the intermediate compound [54-5] in a nitrogen atmosphere, 77.9 ml (77.92 mmol) of phenylmagnesium bromide (1.0 M in THF) Respectively. After completion of the reaction, the reaction mixture was filtered under reduced pressure, 36% hydrochloric acid was added dropwise to the filtrate, the pH was adjusted to 1-2, extracted with dichloromethane, dried over anhydrous magnesium sulfate and filtered. The filtrate was concentrated under reduced pressure, then recrystallized from dichloromethane, hexane and methanol, and the obtained solid was separated and purified by silica gel chromatography to obtain 3.9 g (42%) of light cream solid intermediate compound [54-4] Respectively.

Preparation of intermediate compound [54-5]

In a 500 ml reaction flask, 250 ml of dichloromethane was added to 3.9 g (10.82 mmol) of the intermediate compound [54-4] and 2.3 g (12.99 mmol) of N-bromosuccinimide in a nitrogen atmosphere, and the mixture was stirred at room temperature for 10 hours. After completion of the reaction, the reaction mixture was extracted with dichloromethane, dried over anhydrous magnesium sulfate, filtered and separated by silica gel chromatography to obtain 3.9 g (82%) of a light yellow solid intermediate compound [54-5].

 Preparation of compound [54]

To a 250ml reaction flask were added 3.9g (8.88mmol) of the intermediate compound [54-5], 1.8g (10.65mmol) of the compound [54-6], 0.31g (0.27mmol) of tetrakis (triphenylphosphine) palladium, g (26.63 mmol), distilled water (30 ml) and toluene (90 ml) were added, and the mixture was refluxed and stirred for 24 hours. After completion of the reaction extracted with dichloromethane and dried by filtration over anhydrous magnesium sulfate, the filtrate was prepared after concentration under reduced pressure, purified by silica gel chromatography, the desired compound of off-white solid [54] 2.6g (54%) .

^{1 H NMR (400 MHz, THF} -d8): δ 8.55 ~ 8.42 (m, 2H), 8.08 ~ 8.04 (m, 2H), 7.90 (d, 2H), 7.61 ~ 7.38 (m, 10H), 7.15 ~ 7.12 (m, 4 H), 6.92 (d, 2 H)

MS / FAB: 486 (M < + >).

Synthetic example  3: Preparation of compound [309]

[Reaction Scheme 3]

Preparation of intermediate compound [309-1]

, 15.2 g (102.62 mmol) of the compound [5-1], 27.4 g (205.25 mmol) of aluminum chloride and 30.0 g (114.03 mmol) of 2-bromodibenzo [b, ] To obtain 34.2 g (81%) of a light yellow solid intermediate compound [309-1].

Preparation of intermediate compound [309-2]

34.2 g (83.17 mmol) of the intermediate compound [309-1] was used to prepare 14.7 g (45%) of the intermediate compound [309-2] as a brown solid using the method of [Synthesis Example 1].

Preparation of intermediate compound [309-3]

14.7 g (37.39 mmol) of the intermediate compound [309-2] and 97.2 ml (97.20 mmol) of phenylmagnesium bromide (1.0 M in THF) were added to the solid intermediate compound [309-3] 15.0 g (73%).

Preparation of intermediate compound [309-4]

15.1 g (27.30 mmol) of intermediate compound [309-3], 18.1 g (109.21 mmol) of potassium iodide and 23.15 g (218.42 mmol) of sodium hypophosphite monohydrate were added to a light yellow solid intermediate 5.9 g (42%) of the compound [309-4] was prepared.

 Preparation of compound [309]

(11.45 mmol) of the intermediate compound [309-4], 2.0 g (16.03 mmol) of the compound [309-5], 0.40 g (0.0.34 mmol) of tetrakis (triphenylphosphine) palladium, 2.4 g mmol) was used to prepare 2.5 g (43%) of the desired compound [309] as a pale solid by the method of [Synthesis Example 2].

¹ H NMR (400 MHz, THF-d ₈ ):? 7.90 (d, 2H), 7.61-7.41 (m, 19H), 7.20-7.17

MS / FAB: 512 (M < + >).

Synthetic example  4: Preparation of compound [311]

[Reaction Scheme 4]

Preparation of intermediate compound [311-2]

33.3g (146.59mmol) of the compound [311-1], 39.1g (293.18mmol) of aluminum chloride and 30.0g (162.88mmol) of dibenzo-1,4-dioxin were reacted in the same manner as in [Synthesis Example 1] 47.0 g (78%) of a solid intermediate compound [311-2] was prepared.

Preparation of intermediate compound [311-3]

47.0 g (114.30 mmol) of intermediate compound [311-2] was used to prepare 27.9 g (62%) of intermediate compound [311-3] as a brown solid using the method of [Synthesis Example 1].

Preparation of intermediate compound [311-4]

(314-4)] of 16.9 (18.94 mmol) was obtained by using the method of [Synthesis Example 2] using 27.9 g (70.96 mmol) of the intermediate compound [311-3] and 184.5 ml (184.50 mmol) of phenylmagnesium bromide g (42%).

Preparation of intermediate compound [311-5]

16.8 g (29.85 mmol) of intermediate compound [311-4], 19.8 g (119.40 mmol) of potassium iodide and 25.3 g (238.80 mmol) of sodium diphosphate monohydrate were obtained as a light yellow solid intermediate 8.5 g (55%) of the compound [311-5] was prepared.

 Preparation of compound [311]

(16.49 mmol) of intermediate compound [311-5], 2.8 g (23.09 mmol) of phenylboronic acid, 0.57 g (0.49 mmol) of tetrakis (triphenylphosphine) palladium and 3.4 g (24.74 mmol) (52%) of the title compound [311] as a off-white solid was prepared by the method of Synthesis Example 2].

^{1 H NMR (400 MHz, THF} -d 8): δ 8.15 (s, 1H), 7.92 (d, 1H), 7.65 (d, 1H), 7.56 ~ 7.43 (m, 15H), 7.20 ~ 7.17 (m, 4H), < / RTI > 6.92 (d, 2H)

MS / FAB: 512 (M < + >).

Synthetic example  5-10

The compound [121], the compound [153], the compound [178], the compound [196], the compound [213] and the compound [247] were synthesized using a suitable compound only in substitution of the substituent in the above Synthesis Examples 1-4.

Comparative Example  One

A compound represented by the following formula (a) is used as a fluorescent blue host, and a compound b represented by the following formula (b) is used as a fluorescent blue dopant, and 2-TNATA (4,4 ' 2-yl) -N-phenylamino) -triphenylamine was used as a hole injection layer material and α-NPD (N, N'-di (naphthalene- (30 nm) / Alq ₃ (30 nm) / a-NPD (30 nm) / (a) + ITO / 2-TNATA (30 nm) / Liq (1 nM) / Al (100 nM).

The anode was prepared by cutting Corning's 15 Ω / cm ² (1000 Å) ITO glass substrate to a size of 25 mm × 25 mm × 0.7 mm, ultrasonically cleaning it in acetone isopropyl alcohol and pure water for 15 minutes each, UV ozone cleaning was used. 2-TNATA was vacuum deposited on the substrate to form a hole injection layer having a thickness of 80 nm. On top of the hole injection layer, α-NPD was vacuum deposited to form a hole transport layer having a thickness of 30 nm. A compound represented by the formula (a) and a compound represented by the formula (b) (doping ratio: 5%) were vacuum deposited on the hole transport layer to form a light emitting layer with a thickness of 30 nm. Then, an Alq ₃ compound was vacuum deposited on the light emitting layer to a thickness of 30 nm to form an electron transporting layer. Liq 1 nm (electron injecting layer) and Al 100 nm (cathode) were sequentially vacuum-deposited on the electron transporting layer to form an organic light emitting device as shown in Table 1. This is referred to as Comparative Sample 1.

Example  1 to 10

Except that the compounds 5, 54, 121, 153, 178, 196, 213, 247, 309 and 311 described in the above Synthesis Examples were respectively used as the fluorescent blue host in Comparative Example 1, (30 nm) / compound 5, 54, 121, 153, 178, 196, 213, 247, 309 or 311 + formula b (5%) in the same manner as in Example 1, (30 nm) / Alq ₃ (30 nm) / Liq (1 nm) / Al (100 nm). These are referred to as Samples 1 to 10, respectively.

Evaluation example  1: Evaluation of luminescence characteristics of Comparative Sample 1 and Samples 1 to 10

Comparative Example 1 and Samples 1 to 10 were evaluated for light emission luminance, light emission efficiency and emission peak using Keithley source meter "2400" and KONIKA MINOLTA "CS-2000", respectively, and the results are shown in Table 2 below. The samples showed blue emission peak values in the 456 to 463 nm range.

Sample No. Fluorescent blue host
No. Fluorescent blue dopant
No. Voltage
OP. V Luminance
[cd / m ² ] efficiency
[cd / A] Emission peak
[nm] Comparative Sample 1 a b 5.12 435 4.35 456, 484 One 5 b 4.8 550 5.50 461 2 54 b 4.5 533 5.33 462 3 121 b 4.3 523 5.23 461 4 153 b 4.4 514 5.14 459 5 178 b 4.8 489 4.89 462 6 196 b 4.4 501 5.01 458 7 213 b 4.7 499 4.99 458 8 247 b 4.6 501 5.01 459 9 309 b 4.6 532 5.32 459 10 311 b 4.7 546 5.56 469

As shown in Table 2, Samples 1 to 10 exhibited improved luminescence characteristics as compared with Comparative Sample 1.

Evaluation example  2: Evaluation of life characteristics of Comparative Sample 1 and Samples 1 to 10

The comparative sample 1 and samples 1 to 10 were measured for time to reach 97% of life on the basis of 700 nits using an LTS-1004AC life measuring device manufactured by ENC technology, and the results are shown in Table 3 below .

Sample No. Fluorescent blue host
No. Fluorescent blue dopant
No. life span
Time [Hours] Comparative Sample 1 a b 45 One 5 b 73 2 54 b 75 3 121 b 69 4 153 b 67 5 178 b 84 6 196 b 63 7 213 b 75 8 247 b 68 9 309 b 71 10 311 b 62

As shown in Table 3, Samples 1 to 10 exhibited improved lifetime characteristics as compared with Comparative Sample 1.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And falls within the scope of the invention.

Claims (17)

An organic light-emitting compound represented by the following formula (1):
≪ Formula 1 >

In this formula,
Ar ¹ and Ar ² each independently represent a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C3-C60 heteroaryl group, a substituted or unsubstituted C3-C60 cycloalkyl group, a substituted or unsubstituted C6- (R2), -P (O) (R3) (R4) or? I (R5) (R6) (R7), and R1, R2, R3, R4, R5, R6 and R7 are each independently a C6-C50 aryl group or a C3-C50 heteroaryl group,
The substituent when Ar ¹ and Ar ² are substituted is selected from the group consisting of deuterium, fluorine, a C 1 -C 30 alkyl group, a C 6 -C 30 aryl group, a C 2 -C 30 heteroaryl group, a C 1 -C 30 alkoxy group, a C 1 -C 30 fluoro The alkyl group, -Si (CH _{3) 3,} and -CN one selected from the group consisting of a;
L ¹ and L ² each independently represent a single bond, a substituted or unsubstituted C6-C60 arylene group, a substituted or unsubstituted C3-C60 heteroarylene group, a substituted or unsubstituted C3-C60 cycloalkyl A substituted or unsubstituted C2-C60 heterocycloalkylene group, and combinations thereof;
The substituent when L ¹ and L ² are substituted is at least one selected from the group consisting of a C 1 -C 20 alkyl group and a C 3 -C 20 aryl group;
Ra and Rb each independently represent a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C3-C60 heteroaryl group, a substituted or unsubstituted C3-C60 cycloalkyl group, a substituted or unsubstituted R 2, R 3, R 4 and R 6 are the same or different and each represents a hydrogen atom, a substituted or unsubstituted C2-C60 heterocycloalkyl group, -N (R1) (R2) R4, R5, R6 and R7 are each independently a C6-C50 aryl group or a C3-C50 heteroaryl group,
The substituent when Ra and Rb are substituted is a C1-C30 alkyl group or a C1-C30 alkoxy group;
n and m are each independently an integer of 0 to 4;
The method according to claim 1,
Ar ¹ and Ar ² each independently represent a phenyl group, a cyclohexane group,

,

,

,

,

,

,

,

, A C6-C60 ring group fused with 2 to 5 rings of 3 to 6 member rings, condensed or linked to a spiro structure, and combinations thereof, and the ring of the 3-membered to 6-membered rings is Alicyclic or aromatic ring, which may or may not contain a heteroatom,
The hydrogen atoms in Ar ¹ and Ar ² as defined above are substituted or unsubstituted with a C1-C30 alkyl group or a C6-C30 aryl group;
L ¹ and L ² each independently represent a single bond, a biphenylene, a C 1 -C 20 alkyl group or a phenylene group substituted or unsubstituted with 332,

Or a C6-C60 divalent cyclic group in which 2 to 5 rings of 3 to 6 member rings are fused, condensed or linked in a spiro structure, and the ring of the 3-membered to 6-membered rings may be an alicyclic or aromatic ring And may or may not include a heteroatom,
The hydrogen atoms in L ¹ and L ² defined above may be substituted or unsubstituted with a phenyl group
Organic luminescent compound.
The method according to claim 1,
At least one of -L ¹ -Ar ¹ and -L ² -Ar ² is any one of groups represented by the following structural formulas
Organic luminescent compound.

The method according to claim 1,
The compound represented by any one of the following 1 to 334
Organic luminescent compound.

The method according to claim 1,
The organic luminescent compound is used as a material of an organic film for an organic light emitting device
Organic luminescent compound.
A composition for forming an organic light emitting layer comprising at least one organic luminescent compound according to any one of claims 1 to 5 and a phosphorescent or fluorescent dopant.
The method according to claim 1,
Further comprising a solvent to form a solution or suspension
A composition for forming an organic light emitting layer.
The method according to claim 6,
Further comprising a pigment or dye
Ink composition.
The method according to claim 6,
Further comprising a phosphorescent dopant or a fluorescent dopant
Ink composition.
Wherein the first electrode, the organic layer including one or more organic layers, and the second electrode are stacked, and the organic layer includes at least one organic electroluminescent compound according to claim 1.
11. The method of claim 10,
Wherein the organic layer includes a light-emitting layer, and the light-emitting layer comprises at least one organic light-emitting compound according to claim 1
Organic light emitting device.
12. The method of claim 11,
The organic luminescent compound may be contained in the luminescent layer as a phosphorescent host, a fluorescent host, a phosphorescent dopant, or a fluorescent dopant material
Organic light emitting device.
11. The method of claim 10,
Wherein the organic material layer includes at least one selected from the group consisting of a hole transporting layer, a hole injecting layer, a hole blocking layer, an electron transporting layer, an electron injecting layer and an electron blocking layer
Organic light emitting device.
In the thirteenth aspect,
Wherein the hole transport layer, the hole injection layer, the hole blocking layer, the electron transport layer, the electron injection layer, or the electron blocking layer comprises at least one organic electroluminescent compound according to claim 1
Organic light emitting device.
11. The method of claim 10,
Wherein the organic material layer is formed by applying an ink composition containing at least one organic electroluminescent compound according to claim 1 by a solution process,
Organic light emitting device.
An electronic device comprising the organic light-emitting device according to claim 10.
The method according to claim 16,
The electronic device includes: an organic integrated circuit (O-IC), an organic field effect transistor (O-FET), an organic thin film transistor (O- ), An organic optical detector, an organic photoreceptor, an organic field-quench device (O-FQD), a luminescent electrochemical cell (LEC), an organic laser diode (O-
Electronics.

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