KR101181280B1 - Compound Containing 5-Membered Heterocycle And Organic Electronic Element Using The Same, Terminal Thereof - Google Patents

Abstract

The present invention provides a compound comprising two or more compounds containing two or more five-membered heterocycles, an organic electric device using the same, and a terminal thereof.

Description

Compound Containing 5-Membered Heterocycle And Organic Electronic Element Using The Same, Terminal Thereof}

The present invention relates to a compound comprising two or more compounds containing two or more five-membered heterocycles, an organic electric device using the same, and a terminal thereof.

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. In this case, the organic material layer is often formed of a multi-layered structure composed of different materials in order to increase the efficiency and stability of the organic electric device, for example, it may be made of a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and an electron injection layer.

Materials used as the organic material layer in the organic electric element may be classified into light emitting materials and charge transport materials, such as hole injection materials, hole transport materials, electron transport materials, electron injection materials, and the like, depending on their 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 . In addition, the light emitting material may be classified into blue, green, and red light emitting materials and yellow and orange light emitting materials required to achieve a better natural color according to the light emitting color.

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 the light emitting material in order to increase the light emitting efficiency through the light emitting layer. The principle is that when a small amount of dopant having an energy band gap smaller than that of a host forming the light emitting layer is mixed in the light emitting layer, excitons generated in the light emitting layer are transported to the dopant, thereby producing high-efficiency light. 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 fully exhibit the excellent characteristics of the above-described organic electroluminescent device, a material forming the organic material layer in the device, such as a hole injection material, a hole transport material, a light emitting material, an electron transport material, an electron injection material, etc., is supported by a stable and efficient material. Although this should be preceded, the development of a stable and efficient organic material layer for an organic electric element has not yet been made sufficiently, and therefore, the development of new materials is continuously required.

The present inventors have found a compound containing a five-membered heterocyclic ring having a novel structure, and also found that when the compound is applied to an organic electric device, the luminous efficiency, stability and lifetime of the device can be greatly improved.

Accordingly, an object of the present invention is to provide a compound containing a novel five-membered hetero ring, an organic electric device using the same, and a terminal thereof.

In one aspect, the present invention provides a compound of the formula

The present invention provides a hole injection material, a hole transport material, a light emitting device suitable for fluorescence and phosphorescent devices of all colors, such as red, green, blue, white, etc., according to a compound including two or more five or more heteroatomic heterocycles. It is useful as a material and / or electron transport material, and as a host material for phosphorescent dopants of various colors.

The present invention also provides an organic electronic device using the compound having the above formula and a terminal including the organic electronic device.

Compounds containing two or more compounds containing two or more five-membered heterocycles may play various roles in organic electronic devices and terminals, and are suitable for fluorescent and phosphorescent devices of all colors such as red, green, blue, and white. It is useful as a hole injection material, a hole transport material, a light emitting material and / or an electron transport material, and is useful as a host material for phosphorescent dopants of various colors.

1 to 6 show examples of the organic light emitting display device to which the compound of the present invention can be applied.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though 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."

In one aspect, the present invention provides a compound of Formula 1 below.

In the formula 1,

(1) R ₁ , R ₂ , R ₃ , R ₄ , R ₅ , R ₆ , R ₇ , R ₈ , R ₉ , R ₁₀ , R ₁ ', R ₂ ', R ₃ ', R ₄ ', R ₅ ′, R ₆ ′, R ₇ ′, R ₈ ′, R ₉ ′, and R ₁₀ ′ each independently represent a hydrogen atom, a halogen atom, a cyano group, an alkoxy group, a thiol group, a substituted or unsubstituted carbon number 1 An alkyl group of 50 to 50, a substituted or unsubstituted alkoxy group of 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group of 1 to 50 carbon atoms, a substituted or unsubstituted arylene group of 5 to 60 carbon atoms, a substituted or unsubstituted carbon number 5 to Substitutes containing at least one aryl group of 60, a substituted or unsubstituted aryloxy group having 5 to 60 carbon atoms, sulfur (S), nitrogen (N), oxygen (O), phosphorus (P) and silicon (Si) Or a substituted or unsubstituted C 5 to 60 carbon atoms containing at least one unsubstituted alkyl group having 1 to 50 carbon atoms or sulfur (S), nitrogen (N), oxygen (O), phosphorus (P) and silicon (Si). Heteroaryl group or sulfur (S), nitrogen (N), oxygen (O), (P) and a silicon (Si) can heteroaryloxy substituted or unsubstituted carbon atoms of 5 to 60 ring date, including at least one.

(2) R ₁ to R ₁₀ and R ₁ ′ to R ₁₀ ′ may combine with adjacent groups to form a saturated or unsaturated ring.

(3) X may be carbon (C) or nitrogen (N).

(4) Ar represents a hydrogen atom, a halogen atom, a cyano group, an alkoxy group, a thiol group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 1 to 50 carbon atoms, a substituted or unsubstituted carbon number 5 To 60 arylene group, substituted or unsubstituted aryl group having 5 to 60 carbon atoms, substituted or unsubstituted aryloxy group having 5 to 60 carbon atoms, sulfur (S), nitrogen (N), oxygen (O), phosphorus ( A substituted or unsubstituted alkyl group having 1 to 50 carbon atoms or at least one of P) and silicon (Si) or sulfur (S), nitrogen (N), oxygen (O), phosphorus (P) and silicon (Si); Substituted or unsubstituted C 5 to 60 containing at least one or more

Heteroaryl group or substituted or unsubstituted heteroaryloxy group having 5 to 60 carbon atoms containing at least one or more sulfur (S), nitrogen (N), oxygen (O), phosphorus (P) and silicon (Si). .

(5) The compound having the above structural formula can be used in a soluble process. That is, the organic material layer of the organic electric device, which will be described later, may be formed by a soluble process using the compound.

In another aspect, the present invention provides a compound of Formula 2 below.

In another aspect, the present invention provides a compound of formula 3 below.

Ar in Formulas 2 and 3 is the same as in Formula 1.

Specific examples of the compounds belonging to Chemical Formulas 1 to 3, which are compounds including two or more five-membered heterocyclic rings, according to one embodiment of the present invention include the compounds of Formula 4 below, but the present invention It is not limited only to. The compounds of Formula 4 below are represented by R ₁ to R ₁₀ and R ₁ 'to R ₁₀ ' are hydrogen atoms, but may be other functional groups described in Formulas 1 to 3.

Various organic electric devices exist in which compounds including two or more compounds including two or more five-membered heterocycles described with reference to Chemical Formulas 1 to 4 are used as the organic material layer. Examples of organic electroluminescent devices in which compounds including two or more compounds including two or more five-membered heterocycles described with reference to Chemical Formulas 1 and 4 may be used include, for example, an organic light emitting diode (OLED), an organic solar cell, Organophotoreceptor (OPC) drums, organic transistors (organic TFTs), photodiodes, organic lasers, laser diodes, and the like.

One example of an organic electroluminescent device to which compounds including two or more five-membered heterocyclic rings described with reference to Chemical Formulas 1 to 4 may be applied is described below. The present invention is not limited thereto, and a compound including two or more compounds including two or more five-membered heterocycles described above may be applied to various organic electric devices.

Another embodiment of the present invention is an organic electric device comprising a first electrode, a second electrode and an organic material layer disposed between these electrodes, wherein at least one layer of the organic material layer comprises an organic electric field comprising the compounds of Formulas 1 to 4 Provided is a light emitting device.

1 to 6 show examples of the organic light emitting display device to which the compound of the present invention can be applied.

The organic light emitting device according to another embodiment of the present invention, a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer And a structure known in the art using conventional manufacturing methods and materials in the art, except that at least one layer of the organic material layer including the electron injection layer is formed to include the compounds of Formulas 1 to 6. It can be prepared as.

The structure of the organic light emitting display device according to another embodiment of the present invention is illustrated in FIGS. 1 to 6, but is not limited thereto. In this case, reference numeral 101 denotes a substrate, 102 an anode, 103 a hole injection layer (HIL), 104 a hole transport layer (HTL), 105 a light emitting layer (EML), 106 an electron injection layer (EIL), 107 an electron transport layer ( ETL), 108 represents a negative electrode. Although not shown, the organic light emitting diode may further include a hole blocking layer (HBL) for blocking the movement of holes, an electron blocking layer (EBL) for preventing the movement of electrons, and a protective layer. The protective layer may be formed to protect the organic material layer or the cathode at the uppermost layer.

In this case, the compound including two or more compounds containing two or more five-membered heterocyclic ring described with reference to Formulas 1 to 4 may be included in one or more of an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer and an electron transport layer. have. Specifically, the compound including two or more compounds containing two or more five-membered heterocyclic ring described with reference to Formulas 1 to 4 is a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, a hole blocking layer, It may be used in place of one or more of the electronic blocking layer, the protective layer, or may be used by forming a layer with them. Of course, the organic layer may be used not only in one layer but also in two or more layers.

Compounds containing two or more compounds containing two or more five-membered heterocycles described with reference to Formulas 1 to 4 may play various roles in the organic electronic device and the terminal, and all of red, green, blue, white, etc. It is useful as a hole injection material, a hole transport material, a light emitting material and / or an electron transport material suitable for color fluorescence and phosphorescent devices, and can be used as a host material for phosphorescent dopants of various colors.

For example, the organic light emitting device according to another embodiment of the present invention is a metal having a metal or conductivity on a substrate by using a physical vapor deposition (PVD) method such as sputtering or e-beam evaporation An oxide or an alloy thereof is deposited to form an anode, an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer is formed thereon, and then a material that can be used as a cathode is deposited thereon. Can be prepared.

In addition to the above method, an organic electronic device may be fabricated by sequentially depositing a cathode material, an organic material layer, and an anode material on a substrate. The organic material layer may have a multilayer 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 using a variety of polymer materials by a solvent process such as a spin coating process, a dip coating process, a doctor blading process, a screen printing process, an inkjet printing process or a thermal transfer process, Layer.

An organic light emitting display device according to another embodiment of the present invention forms an organic material layer, for example, a light emitting layer, by a soluble process of a compound containing two or more compounds including two or more five-membered heterocycles described above. You may.

The substrate is a support of the organic light emitting device, and a silicon wafer, quartz or glass plate, metal plate, plastic film or sheet, or the like can be used.

An anode is positioned over the substrate. This anode injects holes into the hole injection layer located thereon. As the anode material, a material having a large work function is usually preferred to facilitate hole injection into the organic material layer. Specific examples of the positive electrode 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.

The hole injection layer is located on the anode. The conditions required for the material of the hole injection layer are high hole injection efficiency from the anode, it should be able to transport the injected holes efficiently. This requires a small ionization potential, high transparency to visible light, and excellent hole stability.

As the hole injecting material, it is preferable that the highest occupied molecular orbital (HOMO) of the hole injecting material be between the work function of the anode material and the HOMO of the surrounding organic layer. Specific examples of hole injection materials include metal porphyrine, oligothiophene, arylamine-based organics, hexanitrile hexaazatriphenylene, quinacridone-based organics, perylene-based organics, Anthraquinone, polyaniline and polythiophene-based conductive polymers, but are not limited thereto.

The hole transport layer is positioned on the hole injection layer. The hole transport layer receives holes from the hole injection layer and transports the holes to the organic light emitting layer located thereon, and serves to prevent high hole mobility, hole stability, and electrons. In addition to these general requirements, when applied for vehicle body display, heat resistance to the device is required, and a material having a glass transition temperature (Tg) of 70 ° C. or higher is preferable. Materials satisfying these conditions include NPD (or NPB), spiro-arylamine compounds, perylene-arylamine compounds, azacycloheptatriene compounds, bis (diphenylvinylphenyl) anthracene, silicon germanium oxide Compound, a silicon-based arylamine compound, and the like.

The organic light emitting layer is positioned on the hole transport layer. The organic light emitting layer is a layer for emitting light by recombination of holes and electrons injected from the anode and the cathode, respectively, and is made of a material having high quantum efficiency. The light emitting material is a material capable of emitting light in the visible region by transporting and combining holes and electrons from the hole transport layer and the electron transport layer, respectively, and a material having good quantum efficiency with respect to fluorescence or phosphorescence is preferable.

Substances or compounds that satisfy these conditions include Alq3 for green, Balq (8-hydroxyquinoline beryllium salt) for blue, DPVBi (4,4'-bis (2,2-diphenylethenyl) -1,1'- biphenyl) series, Spiro material, Spiro-DPVBi (Spiro-4,4'-bis (2,2-diphenylethenyl) -1,1'-biphenyl), LiPBO (2- (2-benzoxazoyl) -phenol lithium salt), bis (diphenylvinylphenylvinyl) benzene, aluminum-quinoline metal complex, metal complexes of imidazole, thiazole and oxazole, and the like, perylene, and BczVBi (3,3 ') to increase blue light emission efficiency. [(1,1'-biphenyl) -4,4'-diyldi-2,1-ethenediyl] bis (9-ethyl) -9H-carbazole; DSA (distrylamine) can be used by doping in small amounts. In the case of red, DCJTB ([2- (1,1-dimethylethyl) -6- [2- (2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H, 5H Small amounts of doping such as -benzo (ij) quinolizin-9-yl) ethenyl] -4H-pyran-4-ylidene] -propanedinitrile) can be used. When the light emitting layer is formed using a process such as inkjet printing, roll coating, or spin coating, an organic light emitting layer is formed of a polymer of polyphenylene vinylene (PPV) or a polymer such as poly fluorene. Can be used for

The electron transport layer is positioned on the organic light emitting layer. The electron transport layer needs a material having high electron injection efficiency from the cathode positioned thereon and capable of efficiently transporting the injected electrons. To this end, it must be made of a material having high electron affinity and electron transfer speed and excellent stability to electrons. Examples of the electron transport material that satisfies such conditions include Al complexes of 8-hydroxyquinoline; Complexes including Alq ₃ ; Organic radical compounds; Hydroxyflavone-metal complexes, and the like, but are not limited thereto.

The electron injection layer is stacked on the electron transport layer. The electron injection layer is a metal complex compound such as Balq, Alq3, Be (bq) 2, Zn (BTZ) 2, Zn (phq) 2, PBD, spiro-PBD, TPBI, Tf-6P, aromatic compound with imidazole ring, It can be produced using a low molecular weight material containing boron compounds and the like. At this time, the electron injection layer may be formed in a thickness range of 100 ~ 300Å.

The cathode is positioned on the electron injection layer. This cathode serves to inject electrons. As the material used as the cathode, it is possible to use the material used for the anode, and a metal having a low work function is more preferable for efficient electron injection. In particular, a suitable metal such as tin, magnesium, indium, calcium, sodium, lithium, aluminum, silver, or a suitable alloy thereof can be used. In addition, an electrode having a two-layer structure such as lithium fluoride and aluminum, lithium oxide and aluminum, strontium oxide and aluminum having a thickness of 100 μm or less may also be used.

As described above, holes suitable for fluorescence and phosphorescent devices of all colors, such as red, green, blue, and white, depending on the compound including two or more compounds including two or more five-membered heterocycles described with reference to Chemical Formulas 1 to 12 It can be used as an injection material, a hole transport material, a light emitting material, an electron transport material and an electron injection material, and can be used as a host material for phosphorescent dopants of various colors.

The organic light emitting device according to the present invention may be a top emission type, a bottom emission type or a double-sided emission type according to the material used.

Meanwhile, the present invention includes a display device including the organic electric element described above, 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 described above 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 control, a navigation device, a game machine, various TVs, various computers, and the like.

Example

Hereinafter, the present invention will be described in more detail with reference to Preparation Examples and Experimental Examples. However, the following Preparation Examples and Experimental Examples are for illustrating the present invention, and the scope of the present invention is not limited thereto.

Manufacturing example

Hereinafter, the preparation or synthesis examples for the compounds containing two or more compounds containing two or more five-membered heterocycles belonging to the formula (4). However, a compound containing two or more compounds containing two or more five-membered heterocycles belonging to Formula 4 because the number of compounds including two or more five-membered heterocyclic rings belonging to Formula 4 is large One or two of them will be described by way of example. Those skilled in the art, that is, those skilled in the art through the preparation examples described below, a compound comprising two or more compounds containing two or more five-membered heterocyclic ring belonging to the present invention not illustrated Can be prepared.

Step 1) Synthesis of Intermediate A

 [Reaction Scheme 1]

Starting materials S, 1,3,5-tribromobenzene, Pd ₂ (dba) ₃ , P ( ^t Bu) ₃ and NaO ^t Bu were dissolved in toluene solvent and stirred at 110 ° C. for 24 hours. After the reaction was completed, the temperature of the reactant was lowered to room temperature, and the resulting solid was filtered under reduced pressure, and then recrystallized with hot toluene solvent to obtain the desired intermediate A (yield: 69%).

Step 2) Synthesis of Intermediate B

 Scheme 2

The intermediate A obtained in step 1) was dissolved in anhydrous THF, the temperature of the reaction was lowered to 8 ° C., n-BuLi (1.6 M in hexane) was slowly added dropwise, and the reaction was stirred at 0 ° C. for 1 hour. The temperature of the reaction was lowered to -78 ℃, Isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane was added dropwise and stirred at room temperature for 12 hours. After completion of the reaction, the mixture was extracted with CH ₂ Cl ₂ , water was removed from the reaction with anhydrous MgSO ₄ , filtered under reduced pressure, and the organic solvent was concentrated to give the resulting product as methyl alcohol.

Recrystallization was used to afford the desired intermediate B (yield: 62%).

Step 3) Synthesis of Intermediate C

 Scheme 3

Starting materials S, Cyanuric chloride, Pd ₂ (dba) ₃ , P ( ^t Bu) ₃ and NaO ^t Bu were dissolved in toluene solvent and stirred at 110 ° C. for 24 hours. After the reaction was completed, the temperature of the reactant was lowered to room temperature, and the resulting solid was filtered under reduced pressure, and then recrystallized with hot toluene solvent to obtain the desired intermediate C (yield: 49%).

Synthesis Example 1 Synthesis of Compound 10

 Scheme 4

The intermediate A, 9-Anthraceneboronic acid, Pd (PPh ₃ ) ₄ and K ₂ CO ₃ synthesized in step 1) were dissolved in anhydrous THF and a small amount of water, and then refluxed for 24 hours. After the reaction was completed, the reaction was cooled to room temperature, extracted with CH ₂ Cl ₂ , and washed with water. After removal of a small amount of water with anhydrous MgSO ₄ and filtration under reduced pressure, the organic solvent was concentrated and the resulting product was recrystallized using a toluene solvent to give the desired compound 10 (yield: 71%).

Synthesis Example 2 Synthesis of Compound 26

 Scheme 5

The intermediate B, 2-Iodo-4,6-diphenylpyrimidine, Pd (PPh ₃ ) ₄ and K ₂ CO ₃ synthesized in step 2) were dissolved in anhydrous THF and a small amount of water, and then refluxed for 24 hours. After the reaction was completed, the reaction was cooled to room temperature, extracted with CH ₂ Cl ₂ , and washed with water. After removal of a small amount of water with anhydrous MgSO ₄ and filtration under reduced pressure, the organic solvent was concentrated and the resulting product was recrystallized using a toluene solvent to give the desired compound 26 (yield: 54%).

Synthesis Example 3 Synthesis of Compound 38

 [Reaction Scheme 6]

Intermediate C, 2-Naphthylboronic acid, Pd (PPh ₃ ) ₄ and K ₂ CO ₃ synthesized in step 3) were dissolved in anhydrous THF and a small amount of water, and then refluxed for 24 hours. After the reaction was completed, the reaction was cooled to room temperature, extracted with CH ₂ Cl ₂ , and washed with water. After removal of a small amount of water with anhydrous MgSO ₄ and filtration under reduced pressure, the organic solvent was concentrated and the resulting product was recrystallized using a toluene solvent to give the desired compound 38 (yield: 77%).

Synthesis Example 4 Synthesis of Compound 56

 [Reaction Scheme 7]

Intermediate C, Quinolin-3-ylboronic acid, Pd (PPh ₃ ) ₄ and K ₂ CO ₃ synthesized in step 3) were dissolved in anhydrous THF and a small amount of water, and then refluxed for 24 hours. After the reaction was completed, the reaction was cooled to room temperature, extracted with CH ₂ Cl ₂ , and washed with water. After removal of a small amount of water with anhydrous MgSO ₄ and filtration under reduced pressure, the organic solvent was concentrated and the resulting product was recrystallized using a toluene solvent to give the desired compound 56 (yield: 65%).

Manufacturing Evaluation of Organic Field Devices

Compounds 10, 26, 38, and 56 obtained through synthesis were used as light emitting host materials of the light emitting layer, respectively, to fabricate an organic light emitting diode according to a conventional method.

First, a copper phthalocyanine (hereinafter abbreviated as CuPc) film was vacuum-deposited on the ITO layer (anode) formed on the glass substrate to form a thickness of 10 nm. Subsequently, 4,4-bis [N- (1-naphthyl) -N-phenylamino] biphenyl (hereinafter abbreviated as α-NPD) was vacuum-deposited onto the membrane as a major transport compound. A hole transport layer was formed.

After the hole transport layer was formed, compounds 10, 26, 38, and 56 were deposited on the hole transport layer as phosphorescent host materials to form a light emitting layer.

At the same time, tris (2-phenylpyridine) iridium (abbreviated as I r (ppy) ₃ hereinafter) was added as a phosphorescent Ir metal complex dopant. At this time, the concentration of I r (ppy) _{3 in} the light emitting layer was 5% by weight. (1,1'-bisphenyl) -4-oleito) bis (2-methyl-8-quinolineoleito) aluminum (hereinafter abbreviated as BAlq) was vacuum-deposited to a thickness of 10 nm as a hole blocking layer. Tris (8-quinolinol) aluminum (hereinafter abbreviated as Alq ₃ ) was formed into an electron injection layer to a thickness of 40 nm. Thereafter, LiF, an alkali metal halide, was deposited to a thickness of 0.2 nm, and then Al was deposited to a thickness of 150 nm to use an Al / LiF as a cathode to prepare an organic light emitting device.

Comparative Experimental Example 1

For comparison, an organic electroluminescent device having the same structure as the test example was manufactured using a compound represented by Chemical Formula 13 (hereinafter abbreviated as CBP) as a light emitting host material instead of the compound of the present invention.

Emitting layer
Host material Voltage
(V) Current density
(mA / cm ² ) Luminance
(cd / m ² ) Luminous efficiency
(cd / A) Chromaticity coordinates
(x, y) Example 1 Compound 10 5.1 0.31 107 62.3 (0.30, 0.60) Example 2 Compound 26 4.9 0.30 105 68.2 (0.32, 0.61) Example 3 Compound 38 5.2 0.33 107 58.3 (0.30, 0.60) Example 4 Compound 56 5.0 0.32 107 65.3 (0.30, 0.60) Comparative Example 1 CBP 6.1 0.31 101 32.6 (0.33, 0.61)

As can be seen from the results of Table 1, as can be seen from the results of the table, the organic electroluminescent device using the organic electroluminescent device material of the present invention is not only excellent in the luminous efficiency compared to the CBP used as a comparative example, Since green light emission is obtained, which is a markedly improved color purity, it can be used as a phosphorescent host material of an organic light emitting display device, which can significantly improve luminous efficiency and color purity.

It is apparent that the same effect can be obtained even when the compounds of the present invention are used in other organic material layers of the organic light emitting device, for example, the host material of the light emitting layer, as well as the electron injection layer, the electron transport layer, the hole injection layer and the hole transport 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 protection scope of the present invention should be interpreted by the following claims, and all the technologies within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims (11)

A compound represented by the following formula.

In the above formula,
(1) R ₁ , R ₂ , R ₃ , R ₄ , R ₅ , R ₆ , R ₇ , R ₈ , R ₉ , R ₁₀ , R ₁ ', R ₂ ', R ₃ ', R ₄ ', R ₅ ′, R ₆ ′, R ₇ ′, R ₈ ′, R ₉ ′, and R ₁₀ ′ each independently represent a hydrogen atom, a halogen atom, a cyano group, a thiol group, a substituted or unsubstituted carbon of 1 to 50 carbon atoms. An alkyl group, a substituted or unsubstituted alkoxy group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted aryl group having 6 to 60 carbon atoms, a substituted or unsubstituted carbon group having 6 to 60 carbon atoms Substituted or unsubstituted heteroalkyl group having 1 or more carbon atoms or sulfur (S) containing at least one or more aryloxy group, sulfur (S), nitrogen (N), oxygen (O), phosphorus (P) and silicon (Si) ), A substituted or unsubstituted heteroaryl group having 5 to 60 carbon atoms or at least one of nitrogen (N), oxygen (O), phosphorus (P) and silicon (Si) or sulfur (S), nitrogen (N) At least one of oxygen (O), phosphorus (P) and silicon (Si); The unsubstituted C3 5-60 heteroaryloxy group,
(2) X is carbon (C) or nitrogen (N),
(3) Ar represents a hydrogen atom, a halogen atom, a cyano group, an alkoxy group, a thiol group, a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 50 carbon atoms, a substituted or unsubstituted carbon number 6 to 60 aryl groups, substituted or unsubstituted aryloxy groups having 6 to 60 carbon atoms, sulfur (S), nitrogen (N), oxygen (O), phosphorus (P) and silicon (Si) at least one Substituted or unsubstituted carbon atoms containing at least one substituted or unsubstituted heteroalkyl group having 1 to 50 carbon atoms or sulfur (S), nitrogen (N), oxygen (O), phosphorus (P) and silicon (Si) 5 to 60 heteroaryl groups or substituted or unsubstituted C 5 to 60 heteroaryl containing at least one or more sulfur (S), nitrogen (N), oxygen (O), phosphorus (P) and silicon (Si) It's oxy,
(4) R ₁ to R ₁₀ and R ₁ ′ to R ₁₀ ′ may combine with adjacent groups to form a saturated or unsaturated ring. According to claim 1, wherein the formula is a compound characterized in that the formula.

According to claim 1, wherein the formula is a compound characterized in that the formula.

The method of claim 1,
R ₁ to R ₁₀ and R ₁ ′ to R ₁₀ ′ combine with adjacent groups to form a saturated or unsaturated ring. The method of claim 1,
The compound is,

Compounds, characterized in that one selected from the group consisting of. An organic electric device comprising at least one organic material layer comprising the compound of claim 1. The method of claim 6,
The organic electroluminescent device according to claim 1, wherein the organic layer is formed by a solution process. The method of claim 6,
The organic electroluminescent device is an organic electroluminescent device comprising a first electrode, the at least one organic material layer and the second electrode in a stacked form sequentially. 9. The method of claim 8,
The organic material layer includes a light emitting layer,
The organic electroluminescent device according to claim 1, wherein the compound is used as a host material in the emission layer. A display device comprising the organic electric element of claim 6;
And a control unit for driving the display device. The method of claim 10,
The organic electroluminescent device includes an organic light emitting diode (OLED), an organic solar cell, an organic photoconductor (OPC) drum, an organic transistor (organic TFT), a photodiode, an organic laser, and a laser diode. Terminal) characterized in that one of.

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