JP6446099B1 - Novel compounds and organic electronic devices containing the same - Google Patents

Abstract

A novel compound and an organic electronic device including the compound are provided. A novel compound represented by formula (I). (Ar1 to Ar4 are each independently H, deuterium, substituted / unsubstituted C1-C20 alkyl group, substituted / unsubstituted C6-C40 aryl group, substituted / unsubstituted C1-C40 heterocyclic group. Or a substituted / unsubstituted amine group; or Ar1 and Ar2 together with the nitrogen atom to which they are attached, a substituted / unsubstituted C1-C40 heterocyclic group; or Ar3 and Ar4 are Together with the nitrogen atom to which is attached, a substituted / unsubstituted C1-C40 heterocyclic group; L and Q are each independently a substituted / unsubstituted C6-C40 arylene group; n1 and n2 Are each independently 0 or 1; and m1 and m2 are each independently 0, 1 or 2, provided that m1 and m2 are not 0 at the same time.)

Description

  The present invention relates to a novel compound and an organic electronic device using the compound.

It is well known that organic light emitting devices (OLED devices) were first invented and proposed by the Eastman Kodak Company by vacuum deposition. Tang and VanSlyke of Kodak Company, the organic layer of an aromatic diamine (abbreviated as ITO) transparent indium tin oxide formed on the upper depositing an electron-transporting material such as Alq ₃ on the glass, then the metal electrodes Was deposited on the Alq ₃ layer, after which the fabrication of an organic electroluminescent (EL) device was completed. Organic EL devices are now a new generation of lighting due to their high brightness, fast response speed, light weight, small size, true color, no difference in viewing angle, no LCD backlight plate, and low power consumption It is a device or a display.

  Recently, several intermediate layers, such as an electron transport layer and a hole transport layer, have been added between the cathode and anode to increase the current efficiency and power efficiency of the OLED. For example, the organic light emitting diode (OLED) 1 ′ shown in FIG. 1 is designed to be composed of a cathode 11 ′, an electron injection layer 13 ′, a light emitting layer 14 ′, a hole transport layer 16 ′, and an anode 18 ′. ing.

  Recently, in order to effectively enhance the lighting performance of OLEDs, OLED manufacturers and researchers have worked hard to develop various compounds for use as OLED materials. However, although a variety of compounds have been developed, current phosphorescent OLEDs still cannot achieve outstanding luminous efficiency and device lifetime. Thus, in view of conventional or commercially available materials for OLEDs that still have drawbacks, the present inventors have made efforts to conduct inventive research on them and ultimately provided new compounds for OLEDs.

  An object of the present disclosure is to provide a novel compound and an organic electronic device including the compound.

  According to one or more embodiments, the compound is represented by the following formula (I):

Where
Ar ₁ , Ar ₂ , Ar ₃ , and Ar ₄ are each independently hydrogen, deuterium, substituted or unsubstituted C ₁ -C ₂₀ alkyl group, substituted or unsubstituted C ₆ -C ₄₀ aryl group, substituted or An unsubstituted C ₁ -C ₄₀ heterocyclic group, or a substituted or unsubstituted amine group; or Ar ₁ and Ar ₂ together with the nitrogen atom to which they are attached, are substituted or unsubstituted C ₁ -C is ₄₀ heterocyclic group; or Ar ₃ and Ar _4, together with the nitrogen atom to which they are attached, a substituted or unsubstituted _C 1 _{-C 40} heterocyclic group;
L and Q are each independently a substituted or unsubstituted _C 6 _{-C 40} arylene group;
n1 and n2 are each independently 0 or 1, and
m1 and m2 are each independently 0, 1 or 2, provided that m1 and m2 are not 0 at the same time.

  According to one or more embodiments, the organic electronic device includes a first electrode; a second electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer is of the formula (I ).

  The present disclosure provides novel compounds. When the compounds of the present disclosure are used in an organic electronic device, the efficiency of the organic electronic device can be improved. In particular, when the novel compound of the present disclosure is used as one material of an organic light emitting device, the light emission efficiency of the organic light emitting device can be further improved.

It is a perspective view which shows the OLED device of a prior art. It is a perspective view which shows the OLED device of this invention. It is a perspective view which shows the organic solar cell device of this invention. Compound (1) (SGM058), Compound (2) (SGM430), Compound (4) (SGM435), Compound (5) (SGM017), Compound (6) (SGM053), Compound (7) ( SGM428), Compound (8) (SGM429), Compound (10) (SGM018), Compound (11) (SGM045), Compound (12) (SGM432), Compound (14) (SGM047), Compound (15) (SGM566) , Compound (16) (SGM586), and Compound (17) (SGM587).

  Hereinafter, the present disclosure will be described in detail. It is to be understood that the terminology described and used in the present disclosure is illustrative and not intended to be limiting in nature. Many modifications and variations of the present disclosure are possible in light of the teachings. It is therefore to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.

Compounds Compounds according to one exemplary embodiment can be represented by the following formula (I):

According to one embodiment, Ar ₁ , Ar ₂ , Ar ₃ , and Ar ₄ are each independently a substituted or unsubstituted C ₆ -C ₄₀ aryl group, or a substituted or unsubstituted C ₁ -C ₄₀ heterocycle. Ar ₁ and Ar ₂ together with the nitrogen atom to which they are attached can be a substituted or unsubstituted C ₁ -C ₄₀ heterocyclic group; or Ar ₃ and Ar _4, together with the nitrogen atom to which they are attached, may be a substituted or unsubstituted C ₁ -C ₄₀ heterocyclic group. Preferably, Ar ₁ , Ar ₂ , Ar ₃ , and Ar ₄ are each independently a substituted or unsubstituted C ₆ -C ₄₀ aryl group, or a substituted or unsubstituted C ₁ -C ₄₀ heteroaryl group; Or Ar ₁ and Ar ₂ together with the nitrogen atom to which they are attached are substituted or unsubstituted C ₁ -C ₄₀ heteroaryl groups; or Ar ₃ and Ar ₄ are together with are nitrogen atom, a substituted or unsubstituted C ₁ -C ₄₀ heteroaryl group.

According to one embodiment, Ar ₁ , Ar ₂ , Ar ₃ , and Ar ₄ are each independently substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted fluorenyl. , Substituted or unsubstituted tribenzyloxepinyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiofuranyl, substituted or unsubstituted naphthyl, or substituted or unsubstituted tribenzyl-azepinyl group. Preferably, Ar ₁ , Ar ₂ , Ar ₃ , and Ar ₄ are each independently substituted with unsubstituted phenyl, phenyl substituted with alkyl, unsubstituted biphenyl, unsubstituted terphenyl, unsubstituted fluorenyl, alkyl. Fluorenyl, unsubstituted tribenzyloxepinyl, unsubstituted dibenzofuranyl, or unsubstituted naphthyl group.

  According to one embodiment, m1 can be 1; and m2 can be 0 or 1. According to another embodiment, m1 can be 1 and m2 can be 0. According to yet another embodiment, m1 can be 1 and m2 can be 1.

According to one embodiment, m1 can be 1; m2 can be 0; and Ar ₁ and Ar ₂ together with the nitrogen atom to which they are attached can be substituted or unsubstituted C _1- It may be C ₄₀ heteroaryl group. Preferably Ar ₁ and Ar ₂ together with the nitrogen atom to which they are attached are unsubstituted tribenzyl-azepinyl groups.

  According to one embodiment, L and Q can each independently be substituted or unsubstituted phenylene, substituted or unsubstituted biphenylene, or substituted or unsubstituted naphthylene. Preferably L and Q are each independently unsubstituted phenylene.

According to one embodiment, when m1 and m2 are not 0 at the same _time, -L n1 -NAr ₁ Ar ₂ and _-Q n2 -NAr ₃ Ar ₄ it may be the same.

According to one embodiment, m1 and m2 are _1, -L n1 -NAr 1 Ar ₂ and _-Q n2 -NAr ₃ Ar ₄ may be the same.

  According to one embodiment, the compound of formula (I) can be represented by any one of the following formulas (I-1) to (I-9).

Ar < ₁ >, Ar < ₂ >, Ar < ₃ >, Ar < ₄ >, L, Q, n1, and n2 in formula (I-1)-(I-9) represent the same thing as the above.

According to one _embodiment, -L n1 -NAr ₁ Ar ₂ and _-Q n2 -NAr ₃ Ar ₄ may be each independently selected from consisting of the following group compound.

In the formula, * represents a bonding position, Ra and Rb are each independently C _1-20 alkyl, and x and y are each independently 1 or 2. Here, Ra and Rb may be the same. x and y may be the same. Examples of Ra and Rb can be methyl, ethyl or propyl. In addition, n1 or n2 can be zero.

According to one embodiment, n1 is 0 and n2 is 1. According to another embodiment, n1 is 1 and n2 is 1. In these two embodiments, L _n1 —NAr ₁ Ar ₂ and —Q _n2 —NAr ₃ Ar ₄ can each independently be selected from compounds consisting of the following groups:

In the formula, * represents a bonding position. The definitions of Ra, Rb, x and y are the same as described above. In these two embodiments, L and Q may each independently be a substituted or unsubstituted C ₆ -C ₄₀ arylene group such as phenylene.

  Hereinafter, the substituents of formula (I) will be described in detail. Substituents not defined in this disclosure are defined as known in the art.

In the present disclosure, unsubstituted alkyl groups can be straight or branched. Examples of alkyl groups include C _1-20 alkyl, C _1-10 alkyl, or C _1-6 alkyl. Specific examples of unsubstituted alkyl groups include methyl, ethyl, n-propyl, iso-propyl, n-butyl, sec-butyl, iso-butyl, tert-butyl, pentyl, neo-pentyl, or hexyl groups. However, it is not limited to these. In the present specification, at least one hydrogen atom of the unsubstituted alkyl group is a halogen group, an alkyl group, an alkenyl group, an alkoxy group, a cycloalkyl group, an aryl group, an arylalkyl group, an arylalkenyl group, a heterocyclic group, It may be substituted with a nitrile group or an acetylene group.

In the present disclosure, an unsubstituted aryl group refers to an aromatic hydrocarbon group. Examples of aryl groups can be C ₆ -C ₄₀ aryl groups, or C ₆ -C ₂₀ aryl groups. In addition, examples of aryl groups can be monocyclic, bicyclic, tricyclic, or polycyclic aromatic hydrocarbon groups; two or more rings can be fused together, or monocyclic They may be bonded to each other via a bond. Specific examples of the unsubstituted aryl group include phenyl, biphenylyl, terphenyl, quarterphenyl, naphthyl, anthryl, benzanthryl, phenanthryl, naphthacenyl, pyrenyl, chrysenyl, benzo [c] phenanthryl, benzo [g] chrysenyl, triphenylenyl, Examples include, but are not limited to, fluorenyl, spirobifluorenyl, benzofluorenyl, or dibenzofluorenyl. In the present specification, at least one hydrogen atom of the unsubstituted aryl group may be substituted with the same substituent as described above for the alkyl group. In addition, the definition of the arylene group is the same as described above, and the detailed description of the arylene group will not be repeated herein.

In the present disclosure, an unsubstituted heterocyclic group refers to a non-aromatic or aromatic hydrocarbon group. Examples of heterocyclic group may be _C 1 _{-C 40} heterocyclic _group, C 2 _{-C 20} heterocyclic group, or a _C 4 _{-C 20} heterocyclic group. In addition, examples of heterocyclic groups include monocyclic, bicyclic, tricyclic, or polycyclic heteroaryl or hetero with at least one heteroatom selected from the group consisting of O, S and N May be cycloalkyl; two or more rings may be fused together or linked to each other through a single bond. Specific examples of unsubstituted heterocyclic groups include pyrrolyl, pyrazinyl, pyridinyl, piperidinyl, indolyl, isoindolyl, imidazolyl, benzimidazolyl, furyl, ozazolyl, thiazolyl, triazolyl, thiadiazolyl, benzothiazolyl, tetrazolyl, oxadiazolyl, carbazyl Benzofuranyl, isobenzofuranyl, dibenzofuranyl, dibenzothiofuranyl, dibenzothiophenyl, quinolyl, isoquinolyl, quinoxalinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, phenothiazinyl, phenoxazinyl, oxazoyl, oxadiazolyl, Flazanyl, thienyl, benzothiophenyl, tribenzyloxepinyl (tribenzylo) Epinyl), thiophenyl, or benzoxazolyl and the like, but is not limited thereto. In the present specification, at least one hydrogen atom of the unsubstituted heterocyclic group may be substituted with the same substituents as described above in connection with the alkyl group.

  In one embodiment, two or more aryl or heterocycles may be directly linked to each other to form a spiro structure. For example, fluorenyl and tribenzo-cycloheptatrienyl may be linked to each other to form a spiro structure.

  In the present disclosure, halogen includes F, Cl, Br and I; preferably F or Br.

In the present disclosure, an unsubstituted alkoxy group refers to a moiety in which the above-defined alkyl is bonded to an oxygen atom. Examples of alkoxy groups can include straight or branched C _1-10 alkoxy, or straight or branched C _1-6 alkoxy. Specific examples of alkoxy include methoxy, ethoxy, n-propoxy, iso-propoxy, n-butoxy, iso-butoxy, sec-butoxy, tert-butoxy, pentyloxy, neo-pentyloxy or hexyloxy, It is not limited to these. In the present specification, at least one hydrogen atom of the unsubstituted alkoxy group may be substituted with the same substituent as described above in connection with the alkyl group.

  In the present disclosure, an unsubstituted cycloalkyl group refers to a monovalent saturated hydrocarbon ring system having 3 to 20 carbon atoms, or 3 to 12 carbon atoms. Specific examples of unsubstituted cycloalkyl groups include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, and cyclooctyl. In the present specification, at least one hydrogen atom of the unsubstituted cycloalkyl group may be substituted with the same substituents as described above in connection with the alkyl group.

In the present disclosure, unsubstituted alkenyl groups can be straight or branched and can have at least one carbon-carbon double bond. Examples of alkenyl _groups, C 1 _{-C 20 alkenyl, C 1-10} alkenyl, or _{C 1-6} include alkenyl. Specific examples of unsubstituted alkenyl groups include, but are not limited to, ethenyl, propenyl, propenylene, allyl, or 1,4-butadienyl groups. In the present specification, at least one hydrogen atom of the unsubstituted alkenyl group may be substituted with the same substituents as described above in connection with the alkyl group.

  As an example of a compound of a formula (I), any one of the following compounds (1)-(212) can be mentioned.

  Here, at least one hydrogen atom of the compounds (1) to (212) can optionally be further substituted with the substituent.

Organic electronic devices Organic electronic devices comprising the compounds are also provided in the present disclosure.

  In one embodiment, the organic electronic device comprises: a first electrode; a second electrode; and an organic layer disposed between the first electrode and the second electrode, the organic layer comprising any one of the compounds Including.

  As used herein, the term “organic layer” refers to a single layer or multiple layers disposed between a first electrode and a second electrode of an organic electronic device.

  Applications of the organic electronic device of the present disclosure include an organic light emitting device, an organic solar cell device, an organic thin film transistor, an organic photodetector, a flat panel display, a computer monitor, a television, a billboard for advertisement, a light for indoor or outdoor lighting, Light for external signals, head-up display, fully transparent display, flexible display, laser printer, telephone, mobile phone, tablet computer, laptop computer, digital camera, camcorder, viewfinder, micro display, vehicle, wide wall, cinema Or a stadium screen or sign, but not limited to. Preferably, the organic electronic device of the present disclosure is applied to an organic light emitting device or an organic solar cell device.

  In one embodiment, the organic electronic device can be an organic light emitting device. FIG. 2 is a perspective view illustrating an exemplary structure of an organic light emitting device that can be used in one embodiment of the present disclosure. As shown in FIG. 2, the organic light emitting device comprises: a substrate 11; an anode 12; a cathode 18; and an organic comprising a hole injection layer 13, a hole transport layer 14, a light emitting layer 15, an electron transport layer 16 and an electron injection layer 17. Including layers. However, the present disclosure is not limited thereto. Other layers that can improve the luminous efficiency of the organic light emitting device, such as an electron blocking layer or a hole blocking layer, can also be formed in the organic light emitting device of the present disclosure. When the organic light emitting device of the present disclosure further includes an electron blocking layer, the electron blocking layer can be disposed between the hole transport layer 14 and the light emitting layer 15. When the organic light emitting device of the present disclosure further includes a hole blocking layer, the hole blocking layer can be disposed between the electron transport layer 16 and the light emitting layer 15.

  In one embodiment, the organic light emitting device of the present disclosure may include a hole transport layer including the compound. In another embodiment, the organic light emitting device of the present disclosure may include a hole injection layer including the compound. In still another embodiment, the organic light emitting device of the present disclosure may include an electron blocking layer including the compound. However, the present disclosure is not limited thereto.

  In one embodiment, the light emitting layer can include a phosphorescent material that can include iridium or platinum. In another embodiment, the light emitting layer can include quantum dots or semiconductor nanocrystal materials. However, the present disclosure is not limited thereto.

  In another embodiment, the organic electronic device can be an organic solar cell. FIG. 3 is a perspective view showing a typical structure of an organic solar cell used in the present specification. As shown in FIG. 3, the organic solar cell is: an organic layer disposed between the first electrode 21; the second electrode 22; and the first electrode 21 and the second electrode 22 and including any one of the compounds 23 may be included. Here, the organic layer 23 can serve as a carrier transport layer.

  Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

Examples The following examples are presented to illustrate features of the disclosure. However, the present disclosure is not limited by the description of the following examples.

  The following syntheses are carried out under a protective gas atmosphere unless otherwise indicated. Starting materials can be purchased from Aldrich or Alfa or can be obtained according to literature procedures.

Synthesis Example 1-Intermediates A1-A9 and their synthesis Intermediates A1-A7 used to prepare the compounds of formula (I) are listed in Table 1 below, in the table below each intermediate The number refers to that CAS number.

Intermediate A1-A5
Intermediates A1-A5 were purchased from Aldrich or Alfa and the CAS numbers were listed above.

Synthesis of intermediates A6 to A9

Intermediates A6 to A9 can be prepared according to Scheme I above. Starting materials Ar ₁ —NH ₂ (arylamine) and Br—Ar ₂ (aryl bromide) are listed in Table 2 below.

Briefly, aryl bromide (1.0 eq), arylamine (1.05 eq), Pd (OAc) ₂ (0.01 eq), 1,1′-bis (diphenylphosphino) ferrocene (0.04 eq) , Sodium tert-butoxide (1.5 eq), and toluene were taken in a pressure tube and heated at 80 ° C. for 12 hours under N ₂ atmosphere. After the reaction was complete, volatiles were removed in vacuo and the resulting solution was extracted with dichloromethane (3 × 60 mL). The combined organic extracts were washed with brine (brine) solution, dried over Na ₂ SO ₄ and concentrated to leave a yellow solid. In addition, the crude product was purified by silica gel column chromatography using a hexane / dichloromethane mixture (2: 1 v / v) as the eluent. Analytical data for the resulting product, intermediates A6-A9, are listed in Table 2 below.

Synthesis Example 2-Intermediates B1-B4 and the intermediates B1-B4 used to prepare the compounds of synthetic formula (I) are listed in Table 3 below, in the table below each intermediate The number refers to its CAS number.

Synthesis of intermediate B4 1-bromo-2-chloro-4-iodobenzene (1.0 eq), 4-chlorophenylboronic acid (1.1 eq), Pd (OAc) ₂ (0 in toluene (0.4M) .01 eq), PPh ₃ (0.04 eq), and a 3.0 M aqueous K ₂ CO ₃ solution (2.0 eq) were heated at 65 ° C. under nitrogen for 12 hours. After cooling to room temperature, the solvent was then removed using a rotary evaporator and the remaining material was purified by column chromatography to yield intermediate B4 (65%). MS: [M] ^<+> = 301.99.

Synthesis Example 3-Intermediates C1-C5 and their synthesis Intermediates C1-C5 used to prepare compounds of formula (I) are listed in Table 4 below.

Synthesis of intermediates C1-C4

  Intermediates C1-C3 can be prepared according to Scheme II above.

Step 1: Spiroalcohol synthesis intermediate B1 (1.0 eq) was dissolved in THF (0.4 M) in a three neck flask and n-BuLi (1.0 eq) was added dropwise at -78 ° C. After stirring for 0.5 hour, 5-dibenzosuberenone (DBE, 0.7 eq) was added. After completion of the reaction, the reaction solution was quenched with water, and the aqueous layer was extracted with ethyl acetate. The extracted solution and organic layer were combined, washed with saturated saline, and then dried over magnesium sulfate. After drying, the mixture was suction filtered, and the filtrate was concentrated, and then 19 g of 9- (biphenyl-2-yl) -dibenzosuberen-5-ol (C1-1, C2-1 or C3- A light yellow powdery solid of 1) was obtained.

Step 2: Synthesis of Intermediates C1-C4 9- (Biphenyl-2-yl) -dibenzosuberen-5-ol (spiro-alcohol B1-2, B2-2 or B3-2) (1.0 eq) Acetic acid (w / v = 1/3 for the reactants) and H ₂ SO ₄ (5 drops) were added and the mixture was stirred at 110 ° C. for 6 hours. The reaction was monitored by HPLC. After completion of the reaction, the precipitate was separated by filtration. The remaining substance was purified by column chromatography to obtain spiro-fluorene-dibenzosuberene compounds (intermediates C1 to C4).

  The yield of intermediates C1-C4 and MS analysis data are also listed in Table 5 below.

Synthesis of intermediate C5

Intermediate C1 (1.0 eq), 4-chlorophenylboronic acid (1.1 eq), Pd (OAc) ₂ (0.01 eq), PPh ₃ (0.04 eq), 3.0 M K ₂ CO _{3 in} toluene. The aqueous solution (1.5 eq) was heated at 100 ° C. for 12 hours. After completion of the reaction, volatiles were removed in vacuo and the resulting solution was extracted with dichloromethane (3 × 60 mL). The combined organic extracts were washed with brine solution, dried over Na ₂ SO ₄ and concentrated to leave a yellow solid. The crude product was further purified by silica gel column chromatography to obtain intermediate C5 (94%).

Synthesis Example 4 Compounds (1), (2), (4) to (8), (10) to (12), (14) to (17)
Synthesis of compounds (1), (2), (4) to (8), (10) to (12), (14) to (17)
The compounds of the present disclosure can be synthesized according to Scheme IV below.

Briefly, palladium diacetate (Pd (OAc) ₂ , 0.5% eq), tris-tert-butylphosphonium tetrafluoroborate (0.02 eq), intermediates A1-A9 (1.0 eq / s for SGM586 synthesis) 2.1 eq), a mixture of intermediates C1-C5 (1.0 eq), and sodium tert-butoxide (t-BuONa, 1.5 eq) in toluene for 8-24 hours at 110 ° C. under an argon atmosphere did. After cooling to room temperature, the reaction was quenched with DI water and the mixture was then extracted with ethyl acetate. The organic extracts were combined, washed with brine and dried over anhydrous MgSO ₄ . The precipitate was separated by filtration. The solvent is removed under reduced pressure, and the residue is applied to a silica gel column to obtain the compounds (1), (2), (4) to (8), (10) to (12), and (14) to (17). It was.

  Products (1), (2), (4)-(8), (10)-(12), (14)-(17), intermediates used, yield, and MS analysis data are shown in the table below. 6. In addition, 1H NMR of the products (1), (2), (4) to (8), (10) to (12), and (14) to (17) are shown in FIGS.

Example-OLED device fabrication A glass substrate coated with ITO (indium tin oxide) so as to have a thickness of 1500 mm was placed in distilled water in which a detergent was dissolved and ultrasonically cleaned. As used herein, detergent refers to Fischer Co. The distilled water was filtered twice with a filter (Millipore Co.). The ITO is washed with detergent for 30 minutes, then ultrasonically washed twice with distilled water for 10 minutes, followed by ultrasonic washing with isopropyl alcohol, acetone, and methanol, which is then dried and then transferred to a plasma cleaner. did. The substrate was then cleaned with oxygen plasma for 5 minutes and then transferred to a vacuum evaporator.

Various organic materials and metal materials were successively deposited on the ITO substrate to obtain the OLED device of this example. The degree of vacuum during the deposition was maintained at 1 × 10 ^{−6 to} 3 × 10 ⁻⁷ torr. In addition, the formulas and code names of the materials used in the following OLED devices are listed in Table 7 below.

Preparation of Blue OLED Device To fabricate the blue OLED device of this example, HAT was first deposited on an ITO substrate to form a first hole injection layer having a thickness of 100 mm. HI-2 was deposited on the first hole injection layer with dopant HAT (5.0 wt%) to form a second hole injection layer having a thickness of 750 mm.

  Next, HT-1 or a compound of the present disclosure was deposited to form a first hole transport layer (HT1) having a thickness of 100 mm; and / or HT-2 or a compound of the present disclosure was deposited. Thus, a second hole transport layer (HT2) having a thickness of 100 mm was formed.

  Next, BH with dopant BD-1 or BD-2 (3.5 wt%) was deposited on the first or second hole transport layer to form a light emitting layer having a thickness of 250 mm. ET with the dopant Liq (35.0 wt%) was deposited on the light emitting layer to form an electron transport layer having a thickness of 250 mm. Liq was deposited on the electron transport layer to form an electron injection layer having a thickness of 15 mm. Al was deposited on the electron injection layer to form a cathode having a thickness of 1500 mm.

  After the above process, a blue OLED device was obtained for use in the following test.

Preparation of a red OLED device The preparation of a red OLED device was similar to that of a blue OLED device except for the second hole injection layer, the light emitting layer and the electron transport layer.

  Here, the thickness of the second hole injection layer was 2100 mm. RH with dopant RD (3.5 wt%) was deposited on the first or second hole transport layer to form a light emitting layer having a thickness of 300 mm. The thickness of the electron transport layer was 350 mm.

OLED Device Measurement The device performance of the resulting blue, green and red OLED devices was measured by PR-650. Data was collected at 1000 nits for blue and red OLED devices. For the green OLED device, data was collected at 3000 nits. Data such as CIE, luminous efficiency (Eff.) And drive voltage (voltage) are shown in Tables 8 to 10 below.

  According to the results shown in Tables 8-10, the OLED device coated with the compound of formula (I) exhibits improved luminous efficiency and low driving voltage. Accordingly, the compound of formula (I) of the present disclosure can be effectively used as a hole transport material for OLED devices.

  Although the present disclosure has been described with reference to preferred embodiments thereof, it is to be understood that many other possible modifications and changes can be made without departing from the spirit and scope of the invention as claimed below.

Claims (5)

Compound of the following formula (I):

Where
m1 and m2 are each independently 0, 1 or 2, provided that, m1 and m2 are rather name simultaneously 0;
-L _n1 -NAr ₁ Ar ₂ and _-Q n2 -NAr ₃ Ar ₄ are each independently selected from the group consisting of:

In the formula, * represents a bonding position . m1 is 1, m @ 2 is _1, a -L n1 -NAr ₁ Ar ₂ and _-Q n2 -NAr ₃ Ar ₄ are the same, compounds of claim 1. The compound according to claim 1, wherein the compound is represented by any one of the following formulas (I-1) to (I-9).
The compound of claim 1, wherein the compound is selected from the group consisting of:
First electrode;
An organic electronic device comprising: a second electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises the compound according to any one of claims 1 to 4. .