KR20210128205A - Compound for organic electronic element, organic electronic element using the same, and an electronic device thereof - Google Patents

Abstract

The present invention provides a novel compound capable of improving the luminous efficiency, stability, and lifespan of an element, an organic electric element using the same, and an electronic device thereof. The present invention provides a compound represented by chemical formula 1 deuterated to 43 to 58%. In another aspect, the present invention provides the organic electric element comprising the compound represented by the chemical formula 1 and the electronic device thereof.

Description

A compound for an organic electric device, an organic electric device using the same, and an electronic device thereof

The present invention relates to a compound for an organic electric device, an organic electric device using the same, and an electronic device thereof.

The flat panel display plays a very important role in supporting the advanced image information society centering on the Internet, which is showing rapid growth in recent years. In particular, the organic electroluminescent device (organic EL device), which is a self-luminous type and can be driven at a low voltage, has superior viewing angle and contrast ratio compared to liquid crystal displays (LCDs), which are the main types of flat panel display devices, and does not require a backlight. It can be light and thin, and has advantageous advantages in terms of power consumption. In addition, it is attracting attention as a next-generation display device because of its fast response speed and wide color reproduction range. In general, an organic EL device is formed on a glass substrate in the order of an anode made of a transparent electrode, an organic thin film including a light emitting region, and a metal electrode (cathode). In this case, the organic thin film includes a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), or an electron injection layer in addition to an emitting layer (EML). , EIL), and may further include an electron blocking layer (EBL) or a hole blocking layer (HBL), and a light emitting auxiliary layer due to the light emitting characteristics of the light emitting layer. When an electric field is applied to the organic EL device having this structure, holes are injected from the anode and electrons are injected from the cathode. to form The formed light-emitting excitons emit light while transitioning to ground states. At this time, a light-emitting dye (guest) is also doped into the light-emitting layer (host) in order to increase the efficiency and stability of the light-emitting state. In order to utilize such an organic electric device in various display media, the lifespan of the device is more important than anything else, and various studies are being conducted to increase the lifespan of the organic electric device. In particular, various studies are being conducted on organic materials inserted into a buffer layer such as a hole transport layer or a light emitting auxiliary layer for excellent lifespan characteristics of organic electric devices. There is a demand for materials for a hole injection layer and a hole transport layer with high uniformity and low crystallinity when forming a thin film after deposition.

It delays the penetration and diffusion of metal oxide from the anode electrode (ITO) into the organic layer, which is one of the causes of shortening the lifespan of the organic electric device, and has stable characteristics against Joule heating generated during device driving, that is, a high glass transition temperature. It is necessary to develop a material for a hole injection layer and a hole transport layer having In addition, it is reported that the low glass transition temperature of the hole transport layer material greatly affects the device lifespan according to the characteristic that the uniformity of the thin film surface is collapsed when the device is driven. In addition, in the formation of OLED devices, the deposition method is the mainstream, and a material that can withstand this deposition method for a long time, that is, a material with strong heat resistance characteristics is required.

In particular, as the main overcoming challenges of the organic light emitting device at present, as the panel size of mobile phones and tablet PCs increases, it is urgent to overcome the problems of power consumption and lifespan.

However, as a hole transport layer material, it is difficult to overcome the driving voltage and lifetime at the same time. The reason is that, in order to lower the driving voltage, materials with excellent hole transport ability, ie, high hole mobility, have a planar structure rich in electrons in most cases. For example, naphthyl, fluorene and phenanthrene and the like. However, when a compound of the above structure is introduced into a hole transport material as a substituent, the hole mobility increases up to a certain number and has a good effect on the lifespan, but the number of introduced into the molecule to reach the low voltage driving target required in the current industry If it is increased, the driving voltage is lowered and low-voltage driving is possible, but the lifespan characteristics are rapidly deteriorated. The reason for this is that, in the case of molecules in which electron-rich planar structures are excessively introduced, when a constant current is continuously supplied during device lifetime evaluation, holes are trapped between the plate-shaped structures and stabilized, which lowers the hole mobility and eventually constant As the driving voltage is increased to apply the current, the lifetime of the device rapidly deteriorates. It is expressed by the following formula.

(J = Space Charge limited current, ε = Permissibility, μ = Mobility Coefficient, θ = Charge Trap Coefficient (Free Carrier/Total Carrier), V = Voltage, d = Thickness)

As the number of free carriers decreases due to the trap phenomenon, the θ value decreases, and accordingly, the driving voltage rises in the organic electroluminescent device of the current driving method that requires a constant current, which affects the lifespan. It can have very fatal consequences. Therefore, as described above, the introduction of an electron-rich plate-like structure capable of increasing hole mobility over a certain amount adversely affects the lifespan, so the possibility of lowering the driving voltage by using it is not large.

Accordingly, the present inventors confirmed that the compound substituted with deuterium exhibits many thermodynamic behaviors compared to the unsubstituted compound. Among these thermodynamic properties, when the iridium compound is substituted with deuterium, the length of carbon, hydrogen and carbon, deuterium bond lengths is It was confirmed that the properties change according to the difference, and the compound composed of deuterium can have higher luminous efficiency due to the weakening of the van der Waals force in the molecule caused by the shorter bond length compared to the compound not substituted with deuterium.

However, the method of lowering the driving voltage by substituting deuterium, that is, increasing the hole transportability of the hole transport material, has not been studied much at present, and the prior art that demonstrates the effect according to a specific deuterium substitution rate has not yet been reported. none. Moreover, the conventionally reported general deuterium substitution method has a disadvantage in that it is difficult to control the substitution rate.

In order to solve the problems of the above-mentioned background art, the present invention, in order to realize a high-life device, which is a required characteristic of an organic electric device, is substituted with deuterium in a specific ratio of 43% to 58% to an amine-based compound having excellent lifespan. The small children were completed.

Accordingly, an object of the present invention is to provide a compound deuterated at a specific ratio, an organic electric device using the same, and an electronic device thereof.

The present invention provides a compound represented by the following formula (1) deuterated to 43% to 58%.

<Formula 1>

In another aspect, the present invention provides a method for preparing a compound represented by Formula 1 deuterated to 43% to 58%.

In another aspect, the present invention provides an organic electric device comprising the compound represented by Formula 1 and an electronic device thereof.

By using the compound according to the present invention, high luminous efficiency, low driving voltage and high heat resistance of the device can be achieved, and color purity and lifespan of the device can be greatly improved.

1 to 3 are exemplary views of an organic electroluminescent device according to the present invention.
4 shows a chemical formula according to an aspect of the present invention.

Hereinafter, it will be described in detail with reference to embodiments of the present invention. In describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the component from other components, and the essence, order, or order of the component is not limited by the term. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but another component is between each component. It should be understood that elements may be “connected,” “coupled,” or “connected.”

As used in this specification and the appended claims, unless otherwise stated, the following terms have the following meanings:

As used herein, the term "halo" or "halogen" is fluorine (F), bromine (Br), chlorine (Cl) or iodine (I), unless otherwise specified.

The term "alkyl" or "alkyl group" as used herein, unless otherwise specified, has a single bond having 1 to 60 carbon atoms, a straight chain alkyl group, a branched chain alkyl group, a cycloalkyl (alicyclic) group, an alkyl-substituted cyclo means a radical of saturated aliphatic functional groups including alkyl groups, cycloalkyl-substituted alkyl groups.

As used herein, the terms "alkenyl group", "alkenyl group" or "alkynyl group" have a double or triple bond of 2 to 60 carbon atoms, respectively, unless otherwise specified, and include a straight or branched chain group, , but not limited thereto.

As used herein, the term "cycloalkyl" refers to an alkyl forming a ring having 3 to 60 carbon atoms, unless otherwise specified, and is not limited thereto. The term "alkoxyl group" used in the present invention, " "Alkoxy group" or "alkyloxy group" means an alkyl group to which an oxygen radical is attached, and has 1 to 60 carbon atoms unless otherwise specified, but is not limited thereto.

As used herein, the term "aryloxyl group" or "aryloxy group" refers to an aryl group to which an oxygen radical is attached, and has 6 to 60 carbon atoms unless otherwise specified, but is not limited thereto.

The terms "aryl group" and "arylene group" used in the present invention have 6 to 60 carbon atoms, respectively, unless otherwise specified, but are not limited thereto. In the present invention, an aryl group or an arylene group means a single ring or multiple ring aromatic, and includes an aromatic ring formed by a neighboring substituent joining or participating in a reaction. For example, the aryl group may be a phenyl group, a biphenyl group, a fluorene group, or a spirofluorene group.

The prefix “aryl” or “ar” refers to a radical substituted with an aryl group. For example, an arylalkyl group is an alkyl group substituted with an aryl group, an arylalkenyl group is an alkenyl group substituted with an aryl group, and the radical substituted with an aryl group has the number of carbon atoms described herein.

Also, when prefixes are named consecutively, it is meant that the substituents are listed in the order listed first. For example, an arylalkoxy group means an alkoxy group substituted with an aryl group, an alkoxylcarbonyl group means a carbonyl group substituted with an alkoxyl group, and an arylcarbonylalkenyl group means an alkenyl group substituted with an arylcarbonyl group and wherein the arylcarbonyl group is a carbonyl group substituted with an aryl group.

The term "heterocyclic group" used in the present invention, unless otherwise specified, contains one or more heteroatoms, has 2 to 60 carbon atoms, includes at least one of a single ring and multiple rings, and includes a heteroaliphatic ring and a heterocyclic group. aromatic rings. It may be formed by combining adjacent functional groups.

As used herein, the term "heteroatom" refers to N, O, S, P or Si, unless otherwise specified.

In addition, the "heterocyclic group" may include a ring containing _{SO 2 instead of carbon forming the ring.} For example, "heterocyclic group" includes the following compounds.

As used herein, the term "fluorenyl group" or "fluorenylene group" means a monovalent or divalent functional group in which R, R' and R" are all hydrogen in the following structures, respectively, unless otherwise specified, " A substituted fluorenyl group" or "substituted fluorenylene group" means that at least one of the substituents R, R', and R" is a substituent other than hydrogen, and R and R' are bonded to each other to form a It includes the case of forming a compound as a spy together.

The term "spiro compound" used in the present invention has a 'spiro union', and the spiro linkage means a connection formed by sharing only one atom in two rings. At this time, the atoms shared by the two rings are called 'spiro atoms', and they are respectively 'monospiro-', 'dispiro-', 'trispiro-', depending on the number of spiro atoms in a compound. ' It's called a compound.

Unless otherwise specified, the term "aliphatic" as used herein means an aliphatic hydrocarbon having 1 to 60 carbon atoms, and "aliphatic ring" means an aliphatic hydrocarbon ring having 3 to 60 carbon atoms.

Unless otherwise specified, the term "ring" as used herein refers to a fused ring consisting of an aliphatic ring having 3 to 60 carbon atoms, an aromatic ring having 6 to 60 carbon atoms, a heterocycle having 2 to 60 carbon atoms, or a combination thereof, Contains saturated or unsaturated rings.

Other heterocompounds or heteroradicals other than the above-mentioned heterocompounds include one or more heteroatoms, but are not limited thereto.

In addition, unless explicitly stated otherwise, in the term "substituted or unsubstituted" used in the present invention, "substitution" means deuterium, halogen, amino group, nitrile group, nitro group, C ₁ ~ C ₂₀ alkyl group, C ₁ ~ C ₂₀ alkoxy group, C ₁ ~ C ₂₀ alkyl amine group, C ₁ ~ C ₂₀ alkyl thiophene group, C ₆ ~ C ₂₀ aryl thiophene group, C ₂ ~ C ₂₀ alkenyl group, C ₂ ~ C of ₂₀ alkynyl, C ₃ ~ C ₂₀ cycloalkyl group, C ₆ ~ C ₂₀ aryl group, of a C ₆ ~ C ₂₀ substituted by deuterium aryl group, a C ₈ ~ C ₂₀ aryl alkenyl group, a silane group, a boron It means substituted with one or more substituents selected from the group consisting of a group, a germanium group, and a C ₂ ~ C _{20 heterocyclic group, but is not limited to these substituents.}

In addition, unless otherwise explicitly described, the formula used in the present invention is applied the same as the definition of the substituent by the exponent definition of the following formula.

Here, when a is an integer of 0, the substituent R ¹ is absent, and when a is an integer of 1, one substituent R ¹ is bonded to any one carbon of the carbons forming the benzene ring, and when a is an integer of 2 or 3 Each is bonded as follows, wherein R ¹ may be the same or different from each other, and when a is an integer of 4 to 6, it is bonded to the carbon of the benzene ring in a similar manner, while the hydrogen bonded to the carbon forming the benzene ring is omitted.

As used herein, the term "deuterated" refers to a compound or group in which deuterium is present at at least 100 times its natural abundance level.

As used herein, the term "perdeuterated" refers to a compound or group in which all hydrogens have been replaced with deuterium. The term deuterated is synonymous with "100% deuterated".

As used herein, the term "deutero-acid" refers to a compound capable of ionizing to donate deuterium ions to Bronsted's base. As used herein, there are no ionizable hydrogens in deuterium-acids.

Hereinafter, a compound according to an aspect of the present invention and an organic electric device including the same will be described.

The present invention is a method that can lower the driving voltage without introducing a plate-shaped molecular structure that adversely affects the lifespan using a material with a good lifespan, and uses a method of substituting deuterium at an appropriate ratio to increase the driving voltage. suggest a way to lower it.

When substituted with deuterium, the zero point energy, that is, the energy of the ground state, is lowered, and as the bond length of deuterium-carbon is shorter than that of hydrogen-carbon, the molecular hardcore volume is increased. reduced, and thus electrical polarizability may be reduced, and the thin film volume may be increased by weakening the intermolecular interaction. This characteristic can reduce the crystallinity of the thin film, that is, it can create an amorphous state, and is very effective in implementing the amorphous state, which is essential in order to increase OLED lifetime and driving characteristics in general.

In addition, when a film is formed with a compound substituted with deuterium, a film is formed in an amorphous glass state that can have a large effect on the hole mobility of the thin film, and this amorphous glass state is isotropic and homogeneous. ) properties, by reducing the grain boundary, it is possible to speed up the flow of charges, that is, hole mobility.

The present invention provides a compound represented by the following formula (1) deuterated to 43% to 58%.

<Formula 1>

{In Formula 1,

1) R ¹ , R ² , R′ and R″ are independently of each other a C ₁ ~ C ₅₀ alkyl group, R ¹ and R ² or R′ and R″ cannot be bonded to each other to form a ring,

2) R ³ , R ⁴ , R ⁵ and R ⁶ are each independently the same as or different from each other, and independently of each other are hydrogen; heavy hydrogen; hydroxyl group; halogen; cyano group; nitro group; C ₆ ~ C ₆₀ Aryl group; fluorenyl group; O, N, S, Si and P containing at least one heteroatom C ₂ ~ C ₆₀ A heterocyclic group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} C ₁ ~ C ₅₀ Alkyl group; C ₂ ~ C ₂₀ Alkenyl group; C ₂ ~ C ₂₀ Alkynyl group; C ₁ ~ C ₃₀ An alkoxyl group; C ₆ ~ C ₃₀ Aryloxy group; and -L′-N(R _a )(R _b ); selected from the group consisting of, wherein L′ is a single bond; C ₆ ~ C ₆₀ Arylene group; fluorenylene group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} And C ₂ ~ C ₆₀ A heterocyclic group is selected from the group consisting of, wherein R _a and R _b are each independently a C ₆ ~ C ₆₀ Aryl group; fluorenyl group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} And O, N, S, Si and P containing at least one heteroatom C ₂ ~ C ₆₀ A heterocyclic group; selected from the group consisting of,

When a, b, c and d are 2 or more, a plurality of R ³ , or a plurality of R ⁴ , or a plurality of R ^{5 ,} or a plurality of R ⁶ may be bonded to each other to form a ring,

3) a and d are each independently an integer of 0 to 4, b and c are each independently an integer of 0 to 3,

4) L ¹ , L ² and L ³ are each independently a single bond; C ₆ ~ C ₆₀ Arylene group; fluorenylene group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} And C ₂ ~ C ₆₀ A heterocyclic group; is selected from the group consisting of,

5) Ar ¹ is a C ₆ ~ C ₆₀ aryl group; fluorenyl group; O, N, S, Si and P containing at least one heteroatom C ₂ ~ C ₆₀ A heterocyclic group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} C ₁ ~ C ₆₀ Alkyl group; C ₂ ~ C ₂₀ Alkenyl group; C ₂ ~ C ₂₀ Alkynyl group; C ₁ ~ C ₃₀ An alkoxyl group; C ₆ ~ C ₃₀ Aryloxy group; -L'-N(R _a )(R _b ); a substituent represented by the following formula (a); and a substituent represented by the following formula (b); selected from the group consisting of,

<Formula a> <Formula b>

In the above formulas a and b,

6) R ^1′ , R ^2′ , R ^3′ and R ^4′ are the same as defined ^{for R 3} in Formula 1 above,

When the adjacent R ^1' or R ^2' is a hydroxyl group, it can be combined with each other to form a ring through oxygen (O),

7) m and n are each independently an integer from 0 to 5,

8) a', b', o and p are each independently an integer of 0 to 4,

9) any one of * is bonded to ^{L 3 of Formula 1,}

Here, the aryl group, the arylene group, the heterocyclic group, the fluorenyl group, the fluorenylene group, the fused ring group, the alkyl group, the alkenyl group, the alkoxy group and the aryloxy group are each deuterium; halogen; silane group; siloxane group; boron group; germanium group; cyano group; nitro group; C ₁ -C ₂₀ Alkylthio group; C ₁ -C ₂₀ An alkoxyl group; C ₁ -C ₂₀ Alkyl group; C ₂ -C ₂₀ alkenyl group; C ₂ -C ₂₀ alkynyl group; C ₆ -C ₂₀ Aryl group; _{a C 6} -C ₂₀ aryl group substituted with deuterium; fluorenyl group; C ₂ -C ₂₀ A heterocyclic group; C ₃ -C ₂₀ cycloalkyl group; C ₇ -C ₂₀ Arylalkyl group; C ₈ -C ₂₀ arylalkenyl group; and -L'-N(R _a )(R _b ); may be further substituted with one or more substituents selected from the group consisting of, and these substituents may be combined with each other to form a ring, where 'ring' means C ₃ -C ₆₀ aliphatic ring, C ₆ -C ₆₀ aromatic ring, C ₂ -C ₆₀ heterocycle, or a fused ring consisting of a combination thereof, including saturated or unsaturated rings.}

In addition, the present invention includes a compound in which Formula 1 is represented by Formula 2 or Formula 3 below.

<Formula 2> <Formula 3>

{In Formula 2 or Formula 3,

1) R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , R′, R″, a, b, c, d, L ¹ , L ² and L ³ are as defined in Formula 1 above. is the same,

2) R ⁷ , R ⁸ and R ⁹ are the same as defined ^{for R 3 in} Formula 1 above,

3) e is an integer from 0 to 5, f is an integer from 0 to 3, g is an integer from 0 to 4,

4) X is O, S or CR ^x R ^y ;

The R ^x and R ^y are each independently a C ₁ ~ C ₅₀ alkyl group; C ₆ ~ C ₆₀ Aryl group; fluorenyl group; O, N, S, Si and P containing at least one heteroatom C ₂ ~ C ₆₀ A heterocyclic group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} and -L′-N(R _a )(R _b ); is selected from the group consisting of, or R ^x and R ^y are bonded to each other to form a C ₆ ~ C ₆₀ aromatic ring; fluorenyl group; O, N, S, Si and P containing at least one heteroatom C ₂ ~ C ₆₀ A heterocyclic group; C ₃ ~ C ₆₀ aliphatic ring; or a C ₃ ~ C ₆₀ aliphatic ring and a C ₆ ~ C ₆₀ aromatic ring fused ring group; to form,

5) L', R _a and R _b are as defined in Formula 1 above.}

In addition, the present invention includes a compound in which Formula 1 is represented by any one of the following compounds P-1 to P-20.

In addition, the present invention, (a) dissolving the compound represented by Formula 1 in perdeuterated benzene (benzene-D ₆ ) to form a first reactant;

(b) adding deuterium-triplic acid (CF ₃ SO ₃ D) to the first reactant to form a second reactant;

(c) deuterated by reacting the second reactant at 80° C. for 3 hours to 18 hours;

(d) cooling the second reactant to room temperature upon completion of the reaction, and then quenching by adding Na ₂ CO _{3 in D 2 O;} and

(e) after concentrating the organic solvent of the second reactant, recrystallizing with toluene and acetone solvent to obtain the deuterated compound represented by Formula 1; A method for preparing a compound represented by Formula 1 is provided.

In step (c), it may preferably be 3 hours.

Referring to FIG. 1 , the organic electric device 100 according to the present invention includes a first electrode 110 , a second electrode 170 , and between the first electrode 110 and the second electrode 170 by Chemical Formula 1 An organic material layer including a single compound or two or more compounds represented by In this case, the first electrode 110 may be an anode or an anode, and the second electrode 170 may be a cathode or a cathode. In the case of an inverted type, the first electrode may be a cathode and the second electrode may be an anode.

The organic material layer may sequentially include a hole injection layer 120 , a hole transport layer 130 , a light emitting layer 140 , an electron transport layer 150 , and an electron injection layer 160 on the first electrode 110 . In this case, the remaining layers except for the light emitting layer 140 may not be formed. It may further include a hole blocking layer, an electron blocking layer, a light emission auxiliary layer 220 , a buffer layer 210 , and the like, and the electron transport layer 150 and the like may serve as a hole blocking layer. (See Fig. 2)

In addition, the organic electric device according to an embodiment of the present invention may further include a protective layer or a light efficiency improving layer 180 . The light efficiency improving layer may be formed on a surface of both surfaces of the first electrode that does not contact the organic material layer or on a surface of both surfaces of the second electrode that does not contact the organic material layer. The compound according to an embodiment of the present invention applied to the organic material layer is a hole injection layer 120, a hole transport layer 130, a light emitting auxiliary layer 220, an electron transport auxiliary layer, an electron transport layer 150, an electron injection layer ( 160), a host or dopant of the emission layer 140, or a material of the light efficiency improving layer. Preferably, for example, the compound according to Formula 1 of the present invention may be used as a material for a light emitting auxiliary layer or a hole transport layer.

The organic material layer may include two or more stacks including a hole transport layer, a light emitting layer, and an electron transport layer sequentially formed on the anode, and may further include a charge generating layer formed between the two or more stacks. (See FIG. 3 . )

On the other hand, even with the same core, the band gap, electrical properties, interface properties, etc. may vary depending on which position the substituent is bonded to, so the selection of the core and the combination of the sub-substituents coupled thereto are also very In particular, when the energy level and T1 value between each organic material layer and the intrinsic properties (mobility, interfacial properties, etc.) of materials are optimally combined, long lifespan and high efficiency can be achieved at the same time.

The organic electroluminescent device according to an embodiment of the present invention may be manufactured using a PVD (physical vapor deposition) method. For example, an anode is formed by depositing a metal or a metal oxide having conductivity or an alloy thereof on a substrate, and the hole injection layer 120, the hole transport layer 130, the light emitting layer 140, the electron transport layer 150 and After forming the organic material layer including the electron injection layer 160, it can be manufactured by depositing a material that can be used as a cathode thereon.

In addition, in the present invention, the organic layer is formed by any one of a spin coating process, a nozzle printing process, an inkjet printing process, a slot coating process, a dip coating process, and a roll-to-roll process, and the organic layer is an electron transport material containing the compound It provides an organic electric device, characterized in that.

As another specific example, the present invention provides an organic electric device, characterized in that the same or different compounds of the compound represented by Formula 1 are mixed and used in the organic material layer.

In addition, the present invention provides a light-emitting auxiliary layer composition comprising the compound represented by Formula 1, and provides an organic electric device including the light-emitting auxiliary layer.

In addition, the present invention provides a hole transport layer composition comprising the compound represented by Formula 1, and provides an organic electric device including the hole transport layer.

In addition, the present invention is a display device including the above-described organic electric device; and a controller for driving the display device.

In another aspect, the present invention provides an electronic device, characterized in that the organic electroluminescent device is at least one of an organic electroluminescent device, an organic solar cell, an organic photoreceptor, an organic transistor, and a device for single-color or white lighting. In this case, the electronic device may be a current or future wired/wireless communication terminal, and includes all electronic devices such as a mobile communication terminal such as a mobile phone, a PDA, an electronic dictionary, a PMP, a remote control, a navigation system, a game machine, various TVs, and various computers.

Hereinafter, a synthesis example of the compound represented by Formula 1 of the present invention and a manufacturing example of the organic electric device of the present invention will be described in detail with reference to Examples, but the present invention is not limited to the following Examples.

[ Synthesis example ]

The compound (final product 1-1) represented by Formula 1 according to the present invention is prepared by reacting Sub 1 with Sub 2 as shown in Scheme 1 below.

<Scheme 1>

The deuterated compound of the compound represented by Formula 1 (final product 1-1) according to the present invention is _{dissolved in perdeuterated benzene (benzene-D 6} ) and deuterated-triflic acid (CF ₃ SO ₃ D) is added, and , is prepared by reacting at a temperature of 80 °C for 3 hours.

1. P-1 Synthesis example

(1) Synthesis of P 1-1

Round Sub 1-1 (9.5 g, 41.5 mmol), Sub 2-1 (15.6 g, 41.5 mmol), Pd ₂ (dba) ₃ (1.1 g, 1.2 mmol), t- BuONa (8.0 g, 83.0 mmol) It was placed in a bottom flask and dissolved in anhydrous Toluene (200 mL), P( t- Bu) ₃ (50wt% Sol.) (1.0 mL, 2.5 mmol) was added, and the mixture was heated and stirred at 110° C. for 4 hours. After confirming the completion of the reaction by TLC, the mixture was cooled to room temperature and extracted with _{CH 2} Cl _{2 and water.} The separated organic layer was _{dried over MgSO 4} and concentrated, and the resulting compound was recrystallized by silicagel column (Hexane: CH ₂ Cl ₂ = 4:1) to obtain 20.8 g (yield: 88%) of P 1-1.

(2) Synthesis of P-1

P 1-1 (10.0 g, 17.6 mmol) obtained in the above synthesis _{was dissolved in perdeuterated benzene (C 6} D ₆ ) (133.4 g, 1,585.3 mmol), and CF ₃ SO ₃ D (13.2 g, 88.1 mmol) was added. After that, the reaction is carried out at a temperature of 80 °C. After taking a sample periodically for 3 hours, measuring the degree of deuterium by LC-MS, cooling to room temperature after the deuterium exchange reaction is completed at the desired substitution rate, and quenching by adding Na ₂ CO _{3 in D 2} O, and concentrating the organic solvent do. Recrystallization using toluene and acetone solvent gave 9.5 g (yield: 92%) of deuterated compound P-1. The final mass was determined by LC-MS to confirm that it was 51.5% deuterated.

2. P-2's Synthesis example

(1) Synthesis of P 1-2

Round Sub 1-2 (10.2 g, 44.6 mmol), Sub 2-2 (17.9 g, 44.6 mmol), Pd ₂ (dba) ₃ (1.2 g, 1.3 mmol), t- BuONa (8.6 g, 89.2 mmol) It was placed in a bottom flask and dissolved in anhydrous Toluene (210 mL), P( t- Bu) ₃ (50wt% Sol.) (1.1 mL, 2.7 mmol) was added, and the mixture was heated and stirred at 110° C. for 4 hours. After confirming the completion of the reaction by TLC, the mixture was cooled to room temperature and extracted with _{CH 2} Cl _{2 and water.} The separated organic layer was _{dried over MgSO 4} and concentrated, and the resulting compound was recrystallized by silicagel column (Hexane: CH ₂ Cl ₂ = 4:1) to obtain 21.2 g (yield: 80%) of P 1-2.

(2) Synthesis of P-2

P 1-2 (11.1 g, 18.7 mmol) obtained in the above synthesis _{was dissolved in perdeuterated benzene (C 6} D ₆ ) (141.6 g, 1,682.4 mmol), and CF ₃ SO ₃ D (14.0 g, 93.5 mmol) was added. After that, the reaction is carried out at a temperature of 80 °C. After taking a sample periodically for 3 hours, measuring the degree of deuterium by LC-MS, cooling to room temperature after the deuterium exchange reaction is completed at the desired substitution rate, and quenching by adding Na ₂ CO _{3 in D 2} O, and concentrating the organic solvent do. Recrystallization using toluene and acetone solvent gave 10.8 g (yield: 95%) of deuterated compound P-2. The final mass was determined by LC-MS to confirm that it was 43.5% deuterated.

3. P-4's Synthesis example

(1) Synthesis of P 1-4

Round Sub 1-4 (8.3 g, 36.3 mmol), Sub 2-4 (13.1 g, 36.3 mmol), Pd ₂ (dba) ₃ (1.0 g, 1.1 mmol), t- BuONa (7.0 g, 72.6 mmol) It was placed in a bottom flask and dissolved in anhydrous Toluene (170 mL), P( t- Bu) ₃ (50wt% Sol.) (0.88 mL, 2.2 mmol) was added, and the mixture was heated and stirred at 110° C. for 4 hours. After confirming the completion of the reaction by TLC, the mixture was cooled to room temperature and extracted with _{CH 2} Cl _{2 and water.} The separated organic layer was _{dried over MgSO 4} and concentrated, and the resulting compound was recrystallized by silicagel column (Hexane: CH ₂ Cl ₂ = 4:1) to obtain 16.2 g (yield: 81%) of P 1-4.

(2) Synthesis of P-4

P 1-4 (12.4 g, 22.4 mmol) obtained in the above synthesis _{was dissolved in perdeuterated benzene (C 6} D ₆ ) (169.6 g, 2,015.4 mmol), and CF ₃ SO ₃ D (16.8 g, 112.0 mmol) was added. After that, the reaction is carried out at a temperature of 80 °C. After taking a sample periodically for 3 hours, measuring the degree of deuterium by LC-MS, cooling to room temperature after the deuterium exchange reaction is completed at the desired substitution rate, and quenching by adding Na ₂ CO _{3 in D 2} O, and concentrating the organic solvent do. Recrystallization using toluene and acetone solvent gave 11.5 g (yield: 90%) of deuterated compound P-4. The final mass was determined by LC-MS to confirm that it was 57.1% deuterated.

4. P-10's Synthesis example

(1) Synthesis of P 1-5

Round Sub 1-5 (10.8 g, 38.7 mmol), Sub 2-5 (14.0 g, 38.7 mmol), Pd ₂ (dba) ₃ (1.1 g, 1.2 mmol), t- BuONa (7.5 g, 77.5 mmol) It was placed in a bottom flask and dissolved in anhydrous Toluene (220 mL), P( t- Bu) ₃ (50wt% Sol.) (0.94 mL, 2.3 mmol) was added, and the mixture was heated and stirred at 110° C. for 4 hours. After confirming the completion of the reaction by TLC, the mixture was cooled to room temperature and extracted with _{CH 2} Cl _{2 and water.} The separated organic layer was _{dried over MgSO 4} and concentrated, and the resulting compound was recrystallized by silicagel column (Hexane: CH ₂ Cl ₂ = 4:1) to obtain 18.5 g (yield: 79%) of P 1-5.

(2) Synthesis of P-10

P 1-5 (9.8 g, 16.2 mmol) obtained in the above synthesis _{was dissolved in perdeuterated benzene (C 6} D ₆ ) (122.9 g, 1,460.7 mmol), and CF ₃ SO ₃ D (12.2 g, 81.2 mmol) was added. After that, the reaction is carried out at a temperature of 80 °C. After taking a sample periodically for 3 hours, measuring the degree of deuterium by LC-MS, cooling to room temperature after the deuterium exchange reaction is completed at the desired substitution rate, and quenching by adding Na ₂ CO _{3 in D 2} O, and concentrating the organic solvent do. Recrystallization using toluene and acetone solvent gave 9.4 g (yield: 93%) of deuterated compound P-10. The final mass was determined by LC-MS to confirm that it was 56.7% deuterated.

[ Comparative Synthesis Example One]

[Synthesis of Comparative Compound A-1]

P 1-1 (9.9 g, 17.4 mmol) obtained in the above synthesis was dissolved in perdeuterated benzene (C ₆ D ₆ ) (132.1 g, 1,569.4 mmol), and CF ₃ SO ₃ D (13.1 g, 87.2 mmol) was added. After that, it is reacted at a temperature of 50° C. for 20 hours to form a deuterated material. After completion of the reaction, after cooling to room temperature, _{Na 2} CO _{3 in D 2} O was added to quench the reaction, and the organic solvent was concentrated. Recrystallization using toluene and acetone solvent gave 9.4 g (yield: 94%) of deuterated Compound A-1. The final mass was determined by LC-MS to confirm that it was 21.2% deuterated.

As can be seen from the results of Comparative Synthesis Example 1, it can be seen that the conventionally known general deuterium substitution method has a long reaction time and it is difficult to control the substitution rate with a significantly lower deuterium substitution rate compared to the preparation method of the present invention. The production method described in the present invention can not only shorten the reaction time by reacting at a high temperature compared to the existing reaction temperature for 3 to 18 hours, preferably 3 hours, but also to obtain a deuterated compound having an improved substitution rate. have.

Meanwhile, FD-MS values of the compounds P-1 to P-20 of the present invention prepared according to the above synthesis examples are shown in Table 1 below.

compound FD-MS compound FD-MS P-1 m/z=584.36 (C ₄₂ H ₁₆ D ₁₇ NO=584.84) P-2 m/z=610.41 (C ₄₅ H ₂₂ D ₁₇ N=610.92) P-3 m/z=572.4 (C ₄₂ H ₁₆ D ₁₉ N=572.86) P-4 m/z=573.40 (C ₄₂ H ₁₅ D ₂₀ N=573.87) P-5 m/z=741.49 (C ₅₅ H ₁₉ D ₂₄ N=742.10) P-6 m/z=701.46 (C ₅₂ H ₁₉ D ₂₂ N=702.04) P-7 m/z=740.48 (C ₅₅ H ₂₀ D ₂₃ N=741.10) P-8 m/z=754.46 (C ₅₄ H ₂₂ D ₂₀ N ₂ O=755.07) P-9 m/z=633.37 (C ₄₆ H ₁₉ D ₁₆ NO=633.89) P-10 m/z=624.42 (C ₄₆ H ₁₆ D ₂₁ N=624.94) P-11 m/z=751.44 (C ₅₅ H ₂₁ D ₂₀ NO=752.06) P-12 m/z=701.46 (C ₅₂ H ₁₉ D ₂₂ N=702.04) P-13 m/z=688.46 (C ₅₁ H ₂₄ D ₁₉ N=689.03) P-14 m/z=649.43 (C ₄₈ H ₁₉ D ₂₀ N=649.97) P-15 m/z=678.38 (C ₄₈ H ₁₈ D ₁₉ NS=679.01) P-16 m/z=636.43 (C ₄₇ H ₂₀ D ₁₉ N=636.95) P-17 m/z=648.43 (C ₄₈ H ₂₀ D ₁₉ N=648.96) P-18 m/z=583.36 (C ₄₂ H ₁₇ D ₁₆ NO=583.83) P-19 m/z=651.45 (C ₄₈ H ₁₇ D ₂₂ N=651.98) P-20 m/z=653.37 (C ₄₆ H ₁₅ D ₂₀ NS=653.98)

Manufacturing evaluation of organic electric devices

[ Example One] Blue organic electroluminescent device ( light emitting layer )

After vacuum deposition of 2-TNATA to a thickness of 60 nm on the ITO layer (anode) formed on the glass substrate to form a hole injection layer, NPB was vacuum deposited on the hole injection layer to a thickness of 60 nm to form a hole transport layer. . Then, the compound P-1 of the present invention was vacuum-deposited on the hole transport layer to a thickness of 20 nm to form a light-emitting auxiliary layer, and then, 9,10-di(naphthalen-2-yl) as a host on the light-emitting auxiliary layer. ) Anthracene and BD-052X (manufactured by Idemitsu kosan) as a dopant were used in a weight ratio of 96:4 to form a light emitting layer with a thickness of 30 nm. Subsequently, (1,1'-biphenyl-4-olato)bis(2-methyl-8-quinolinolato)aluminum (hereinafter, BAlq) was vacuum-deposited to a thickness of 10 nm to form a hole blocking layer, and on the hole blocking layer bis(10-hydroxybenzo[h]quinolinato)beryllium (hereinafter, BeBq ₂ ) was vacuum-deposited to a thickness of 40 nm to form an electron transport layer. Thereafter, LiF, which is an alkali metal halide, was deposited to a thickness of 0.2 nm to form an electron injection layer, and then Al was deposited to a thickness of 150 nm to form a cathode, thereby manufacturing an organic electroluminescent device.

[ Example 2] to [ Example 20] Blue organic electroluminescent device ( light emitting layer )

An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the compound of the present invention described in Table 2 was used instead of the compound P-1 of the present invention as a light emitting auxiliary layer material.

[ comparative example 1] and [ comparative example 2]

An organic electroluminescent device was manufactured in the same manner as in Example 1, except that Comparative Compound 1 or Comparative Compound 2 described in Table 2 was used instead of Compound P-1 of the present invention as a light emitting auxiliary layer material.

<Comparative compound 1> <Comparative compound 2>

By applying a forward bias DC voltage to the organic electroluminescent devices manufactured by Examples 1 to 20, Comparative Example 1 and Comparative Example 2 of the present invention, electroluminescence (EL) characteristics with PR-650 manufactured by photoresearch was measured, and the T95 lifetime was measured using a lifetime measuring device manufactured by McScience at ^{500 cd/m 2 standard luminance, and the measurement results are shown in Table 2 below.}

compound Voltage
(V) Current
Density
(mA/cm ² ) Brightness
(cd/m ² ) Efficiency
(cd/A) Lifetime
T(95) CIE x y Comparative Example (1) Comparative compound 1 5.7 8.5 500.0 5.9 80.7 0.132 0.100 Comparative Example (2) Comparative compound 2 5.6 8.3 500.0 6.0 93.8 0.132 1.100 Example (1) P-1 5.4 8.3 500.0 6.1 113.4 0.131 0.100 Example (2) P-2 5.5 8.3 500.0 6.0 113.3 0.132 0.100 Example (3) P-3 5.5 8.1 500.0 6.2 114.0 0.132 0.100 Example (4) P-4 5.4 8.2 500.0 6.1 113.7 0.131 0.100 Example (5) P-5 5.4 8.1 500.0 6.2 111.6 0.131 0.100 Example (6) P-6 5.4 8.3 500.0 6.0 112.4 0.130 0.100 Example (7) P-7 5.6 8.1 500.0 6.1 110.9 0.131 0.100 Example (8) P-8 5.4 8.1 500.0 6.2 110.3 0.131 0.100 Example (9) P-9 5.4 8.1 500.0 6.2 111.8 0.131 0.100 Example (10) P-10 5.4 8.3 500.0 6.0 112.7 0.130 0.100 Example (11) P-11 5.6 8.1 500.0 6.2 109.6 0.130 0.100 Example (12) P-12 5.6 8.1 500.0 6.2 110.7 0.131 0.100 Example (13) P-13 5.4 8.1 500.0 6.2 112.1 0.131 0.100 Example (14) P-14 5.5 8.1 500.0 6.1 110.6 0.132 0.100 Example (15) P-15 5.5 8.2 500.0 6.1 110.1 0.133 0.100 Example (16) P-16 5.5 8.3 500.0 6.0 112.6 0.132 0.100 Example (17) P-17 5.5 8.2 500.0 6.1 111.5 0.131 0.100 Example (18) P-18 5.5 8.2 500.0 6.1 109.4 0.132 0.100 Example (19) P-19 5.5 8.3 500.0 6.0 112.0 0.130 0.100 Example (20) P-20 5.4 8.1 500.0 6.1 111.3 0.131 0.100

As can be seen from the results of Table 2, when a blue organic light emitting device is manufactured using the material for an organic light emitting device of the present invention as a light emitting auxiliary layer material, the organic electroluminescence device is higher than that of Comparative Examples using Comparative Compound 1 or Comparative Compound 2 It can be seen that the lifetime of the light emitting device can be significantly improved.

More specifically, compared to Comparative Compound 1 in which deuterium is not substituted, Comparative Compound 2, in which 29.3% of the total hydrogen was substituted with deuterium, showed improved device results, and the driving voltage, efficiency, and lifespan were more improved, and 43 out of the total hydrogen compared to Comparative Compound 2 % to 58% of the compound of the present invention substituted with deuterium showed excellent device results in terms of lifespan.

When deuterium is substituted, as the bond length of deuterium-carbon becomes shorter than that of hydrogen-carbon, the molecular hardcore volume is reduced, and thus electrical polarizability can be reduced. Due to this, the effect of lowering the crystallinity of the thin film, that is, an amorphous state can be made, and consequently hole mobility can be increased.

In particular, the compound of the present invention deuterated at a substitution rate of 43% to 58%, which is higher than the existing substitution rate, increases BDE (Bond Dissociation Energy) compared to the comparative compound, thereby maximizing the bond stability of the structure, and as a result, the stability of the molecules in the device As it is improved, it can be confirmed that remarkably excellent results are obtained in terms of lifespan.

This suggests that even though they have a similar structure, the physical properties of the compound, properties, and results of the device may be significantly different depending on the substitution rate of deuterium.

In the case of the light emitting auxiliary layer, it is necessary to understand the correlation between the hole transport layer and the light emitting layer (host). It will be very difficult.

In addition, although the device characteristics in which the compound of the present invention is applied only to the light emitting auxiliary layer has been described in the evaluation results of the above-described device fabrication, the compound of the present invention may be applied to the hole transport layer or both the hole transport layer and the light emission auxiliary layer may be applied.

The above description is merely illustrative of the present invention, and various modifications will be possible without departing from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. Accordingly, the embodiments disclosed in the present specification are intended to illustrate, not to limit the present invention, and the spirit and scope of the present invention are not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all descriptions within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100, 200, 300: organic electric device 110: first electrode
120: hole injection layer 130: hole transport layer
140: pore layer 150: electron transport layer
160: electron injection layer 170: second electrode
160: electron transport layer 170: electron injection layer
180: light efficiency improvement layer 210: buffer layer
220: light emitting auxiliary layer 320: first hole injection layer
330: first hole transport layer 340: first light emitting layer
350: first electron transport layer 360: first charge generation layer
361: second charge generation layer 420: second hole injection layer
430: second hole transport layer 440: second light emitting layer
450: second electron transport layer CGL: charge generation layer
ST1: first stack ST2: second stack

Claims (13)

A compound represented by the following formula 1 deuterated to 43% to 58%
<Formula 1>

{In Formula 1,
1) R ¹ , R ² , R′ and R″ are independently of each other a C ₁ ~ C ₅₀ alkyl group, R ¹ and R ² or R′ and R″ cannot be bonded to each other to form a ring,
2) R ³ , R ⁴ , R ⁵ and R ⁶ are each independently the same as or different from each other, and independently of each other are hydrogen; heavy hydrogen; hydroxyl group; halogen; cyano group; nitro group; C ₆ ~ C ₆₀ Aryl group; fluorenyl group; O, N, S, Si and P containing at least one heteroatom C ₂ ~ C ₆₀ A heterocyclic group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} C ₁ ~ C ₅₀ Alkyl group; C ₂ ~ C ₂₀ Alkenyl group; C ₂ ~ C ₂₀ Alkynyl group; C ₁ ~ C ₃₀ An alkoxyl group; C ₆ ~ C ₃₀ Aryloxy group; and -L′-N(R _a )(R _b ); selected from the group consisting of, wherein L′ is a single bond; C ₆ ~ C ₆₀ Arylene group; fluorenylene group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} And C ₂ ~ C ₆₀ A heterocyclic group is selected from the group consisting of, wherein R _a and R _b are each independently a C ₆ ~ C ₆₀ Aryl group; fluorenyl group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} And O, N, S, Si and P containing at least one heteroatom C ₂ ~ C ₆₀ A heterocyclic group; selected from the group consisting of,
When a, b, c and d are 2 or more, a plurality of R ³ , or a plurality of R ⁴ , or a plurality of R ^{5 ,} or a plurality of R ⁶ may be bonded to each other to form a ring,
3) a and d are each independently an integer of 0 to 4, b and c are each independently an integer of 0 to 3,
4) L ¹ , L ² and L ³ are each independently a single bond; C ₆ ~ C ₆₀ Arylene group; fluorenylene group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} And C ₂ ~ C ₆₀ A heterocyclic group; is selected from the group consisting of,
5) Ar ¹ is a C ₆ ~ C ₆₀ aryl group; fluorenyl group; O, N, S, Si and P containing at least one heteroatom C ₂ ~ C ₆₀ A heterocyclic group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} C ₁ ~ C ₆₀ Alkyl group; C ₂ ~ C ₂₀ Alkenyl group; C ₂ ~ C ₂₀ Alkynyl group; C ₁ ~ C ₃₀ An alkoxyl group; C ₆ ~ C ₃₀ Aryloxy group; -L'-N(R _a )(R _b ); a substituent represented by the following formula (a); and a substituent represented by the following formula (b); selected from the group consisting of,
<Formula a><Formulab>

In the above formulas a and b,
6) R ^1′ , R ^2′ , R ^3′ and R ^4′ are the same as defined ^{for R 3} in Formula 1 above,
When the adjacent R ^1' or R ^2' is a hydroxyl group, it can be combined with each other to form a ring through oxygen (O),
7) m and n are each independently an integer from 0 to 5,
8) a', b', o and p are each independently an integer of 0 to 4,
9) any one of * is bonded to ^{L 3 of Formula 1,}

Here, the aryl group, the arylene group, the heterocyclic group, the fluorenyl group, the fluorenylene group, the fused ring group, the alkyl group, the alkenyl group, the alkoxy group and the aryloxy group are each deuterium; halogen; silane group; siloxane group; boron group; germanium group; cyano group; nitro group; C ₁ -C ₂₀ Alkylthio group; C ₁ -C ₂₀ alkoxyl group; C ₁ -C ₂₀ Alkyl group; C ₂ -C ₂₀ alkenyl group; C ₂ -C ₂₀ alkynyl group; C ₆ -C ₂₀ Aryl group; _{a C 6} -C ₂₀ aryl group substituted with deuterium; fluorenyl group; C ₂ -C ₂₀ A heterocyclic group; C ₃ -C ₂₀ cycloalkyl group; C ₇ -C ₂₀ Arylalkyl group; C ₈ -C ₂₀ arylalkenyl group; and -L'-N(R _a )(R _b ); may be further substituted with one or more substituents selected from the group consisting of, and these substituents may be combined with each other to form a ring, where 'ring' means C ₃ -C ₆₀ aliphatic ring, C ₆ -C ₆₀ aromatic ring, C ₂ -C ₆₀ heterocycle, or a fused ring consisting of a combination thereof, including saturated or unsaturated rings.}
The compound according to claim 1, wherein Chemical Formula 1 is represented by the following Chemical Formula 2 or Chemical Formula 3
<Formula 2><Formula3>

{In Formula 2 and Formula 3,
1) R ¹ , R ² , R ³ , R ⁴ , R ⁵ , R ⁶ , R′, R″, a, b, c, d, L ¹ , L ² and L ³ are as defined in claim 1 above. is the same,
2) R ⁷ , R ⁸ and R ⁹ are the same as defined ^{for R 3 in} claim 1 above,
3) e is an integer from 0 to 5, f is an integer from 0 to 3, g is an integer from 0 to 4,
4) X is O, S or CR ^x R ^y ;
The R ^x and R ^y are each independently a C ₁ ~ C ₅₀ alkyl group; C ₆ ~ C ₆₀ Aryl group; fluorenyl group; O, N, S, Si and P containing at least one heteroatom C ₂ ~ C ₆₀ A heterocyclic group; C ₃ ~ C ₆₀ A fused ring group of an aliphatic ring and C ₆ ~ C _{60 aromatic ring;} and -L′-N(R _a )(R _b ); is selected from the group consisting of, or R ^x and R ^y are bonded to each other to form a C ₆ ~ C ₆₀ aromatic ring; fluorenyl group; O, N, S, Si and P containing at least one heteroatom C ₂ ~ C ₆₀ A heterocyclic group; C ₃ ~ C ₆₀ aliphatic ring; or a C ₃ ~ C ₆₀ aliphatic ring and a C ₆ ~ C ₆₀ aromatic ring fused ring group; to form,
5) L', R _a and R _b are as defined in claim 1 above.}
The compound according to claim 1, wherein Formula 1 is represented by any one of the following compounds P-1 to P-20.

In the method for preparing the compound represented by Formula 1 deuterated to 43% to 58% according to claim 1,
(a) dissolving the compound represented by Formula 1 in perdeuterated benzene (benzene-D ₆ ) to form a first reactant;
(b) adding deuterium-triplic acid (CF ₃ SO ₃ D) to the first reactant to form a second reactant;
(c) deuterated by reacting the second reactant at 80° C. for 3 hours to 18 hours;
(d) cooling the second reactant to room temperature upon completion of the reaction, and then quenching by adding Na ₂ CO _{3 in D 2 O;} and
(e) after concentrating the organic solvent of the second reactant, recrystallization with toluene and acetone solvent to obtain the deuterated compound represented by Formula 1; Method for preparing a compound represented by the formula (1)
An organic electric device comprising an anode, a cathode, and an organic material layer formed between the anode and the cathode, wherein the organic material layer comprises a single compound or two or more compounds represented by Formula 1 of claim 1
The organic electric device according to claim 5, wherein the organic material layer comprises at least one of a hole injection layer, a hole transport layer, a light emission auxiliary layer, a light emitting layer, an electron transport auxiliary layer, an electron transport layer, and an electron injection layer.
The organic electric device according to claim 5, wherein the organic material layer is a light emitting auxiliary layer.
The organic electric device according to claim 5, wherein the organic material layer is a hole transport layer.
The organic electric device according to claim 5, further comprising a light efficiency improving layer formed on at least one surface opposite to the organic material layer among one surface of the anode and the cathode.
The organic electric device according to claim 5, wherein the organic material layer includes at least two stacks including a hole transport layer, a light emitting layer, and an electron transport layer sequentially formed on the anode.
The organic electric device according to claim 5, wherein the organic material layer further comprises a charge generating layer formed between the two or more stacks.
A display device comprising the organic electric device of claim 5; and a controller configured to drive the display device.
13. The method of claim 12, wherein the organic electroluminescent device is at least one of an organic electroluminescent device (OLED), an organic solar cell, an organic photoreceptor (OPC), an organic transistor (organic TFT), and a device for monochromatic or white illumination. electronic device

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