KR20160069981A - Organic light emitting device and display device having the same - Google Patents

Abstract

An organic light emitting element comprises: a first electrode; a hole transport region provided on top of the first electrode; a luminous layer provided on top of the hole transport region; an electron transport region provided on top of the luminous layer; and a second electrode provided on top of the electron transport region. The electron transport region comprises a compound represented by chemical formula 1. The organic light emitting element has high efficiency and long lifespan.

Description

TECHNICAL FIELD [0001] The present invention relates to an organic light emitting diode (OLED) and a display device including the OLED.

The present invention relates to an organic light emitting device and a display device including the same.

A flat display device can be roughly divided into a light emitting type and a light receiving type. Examples of the light emitting type include a flat cathode ray tube, a plasma display panel, and an organic light emitting display (OLED). The organic light emitting display has a wide viewing angle, excellent contrast, and high response speed.

Accordingly, the organic light emitting display device can be applied to a display device for a mobile device such as a digital camera, a video camera, a camcorder, a portable information terminal, a smart phone, an ultrathin notebook, a tablet personal computer, a flexible display device, And it can be applied to a large electronic product such as a television or a large electric product.

In the organic light emitting display, a color can be realized by recombining holes and electrons injected into the first electrode and the second electrode to emit light in the light emitting layer. The exciton, in which the injected holes and electrons are combined, And emits light when falling.

An object of the present invention is to provide an organic light emitting device having high efficiency and long life.

An object of the present invention is to provide a display device including an organic light emitting device with high efficiency and long life.

The organic light emitting device according to an embodiment of the present invention includes a first electrode, a hole transporting region provided on the first electrode, a light emitting layer provided on the hole transporting region, an electron transporting region provided on the light emitting layer, And a second electrode provided on the transport region. The electron transporting region includes a compound represented by the following general formula (1).

[Chemical Formula 1]

In Formula 1, X ₁ and X ₂ are each independently CR ₅ or N, and R ₁ to R ₅ are each independently selected from the group consisting of hydrogen, deuterium, an alkyl group having 1 to 40 carbon atoms, an aryl group having 6 to 40 carbon atoms, An aryloxy group having 1 to 40 carbon atoms, an aryloxy group having 6 to 40 carbon atoms, an arylamino group having 6 to 40 carbon atoms, a diarylamino group having 12 to 40 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms , A cycloalkyl group having 3 to 40 carbon atoms, and a heterocycloalkyl group having 3 to 40 carbon atoms, or may form a condensed aromatic aliphatic ring, A halogen atom or a combination thereof; L is a single bond, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C1-C30 condensed aryl group, A substituted or unsubstituted heteroaryl group containing N, S, O having 1 to 30 carbon atoms and a substituted or unsubstituted condensed heteroarylene group containing N, S, O having 1 to 30 carbon atoms , Het is a substituted or unsubstituted heteroaryl group containing 3 to 20 carbon atoms, and A ₁ and Ar ₂ are each independently selected from the group consisting of hydrogen, a substituted or unsubstituted aryl group having 6 to 40 carbon atoms or a substituted or unsubstituted Or a heteroaryl group having 1 to 40 carbon atoms.

The electron transporting region may include at least one of the compounds represented by the following Group 1 compounds.

[Compound group 1]

The light emitting layer may include a compound represented by the following general formula (2).

(2)

In Formula 2, AA represents a cycloalkyl group having 3 to 60 carbon atoms, a 5-membered to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, An aryl group having 6 to 60 carbon atoms, or a heteroaryl group having 1 to 60 carbon atoms, or a ring containing X and a ring containing Y, Condensed with the ring to form a condensed aliphatic ring, a condensed aromatic ring, a condensed heteroaliphatic ring or a condensed heteroaromatic ring.

X is selected from N (Ar ₃ ), O and S, Y is selected from N (Ar ₄ ), O and S, Ar ₃ and Ar ₄ independently of one another are an alkyl group having 1 to 60 carbon atoms, A 5 to 6 membered heterocycloalkyl group containing at least one member selected from the group consisting of N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms , An alkynyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, and a heteroaryl group having 1 to 60 carbon atoms, Z ₁ to Z ₈ are each independently selected from C (Ar ₅ ) ₁ to Z ₈ Ar ₅ is contained in each may be different from each other, adjacent to Ar ₅ may bond to one another to form a ring, Z ₁ to Z ₈ Ar ₅ included in each is independently hydrogen, a carbon number of 1 to each other A halogen atom, a cyano group, a cycloalkyl group having 3 to 60 carbon atoms , A 5- to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms, An aryl group having 6 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, an alkoxy group having 1 to 60 carbon atoms, an aryloxy group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, A mono or dialkylamino group having 1 to 60 carbon atoms, a monoarylamino group having 6 to 30 carbon atoms, a trialkylsilyl group having 3 to 90 carbon atoms, a dialkylarylsilyl group having 7 to 60 carbon atoms, A mono or diarylboranyl group having 6 to 60 carbon atoms, a mono or dialkylboranyl group having 1 to 120 carbon atoms, a nitro group and a hydroxyl group, provided that when X is N ( Ar ₃ ), Y is N (Ar ₄ ) , And the case where Ar ₃ and Ar ₄ are the same, and all of Z ₁ to Z ₈ are C (Ar ₅ ) and the Ar ₅ included in each of Z ₁ to Z ₈ are the same.

Ar ₃ to Ar ₅ each independently represent an alkyl group, a cycloalkyl group, a heterocycloalkyl group, a bicycloalkyl group, an adamantyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an aryloxy group, a heteroaryl group, An aryl group, an aryl group, an alkylthio group, an alkylamino group, an arylamino group, a trialkylsilyl group, a dialkylarylsilyl group, a triarylsilyl group, an arylboranyl group or an alkylboranyl group is an alkyl group having 1 to 60 carbon atoms, a halogen group, A cycloalkyl group having 3 to 60 carbon atoms, a 5-membered to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, (= O) RaRb wherein Ra and Rb are independently of each other an alkyl group having 1 to 60 carbon atoms, an alkenyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, an alkoxy group having 1 to 60 carbon atoms, Having from 1 to 60 carbon atoms An aryl group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms substituted with an aryl group having 6 to 60 carbon atoms, an aryl group having 1 to 6 carbon atoms substituted with an aryl group having 6 to 60 carbon atoms, An arylthio group having 6 to 60 carbon atoms, an alkylthio group having 1 to 60 carbon atoms, a mono or di (meth) acryloyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 1 to 60 carbon atoms, An alkylamino group, a mono or diarylamino group having 6 to 60 carbon atoms, a trialkylsilyl group having 3 to 90 carbon atoms, a dialkylarylsilyl group having 7 to 60 carbon atoms, a triarylsilyl group having 18 to 90 carbon atoms, A mono or diarylboranyl group, a mono or dialkylboranyl group having 1 to 120 carbon atoms, a nitro group, and a hydroxy group, which may be further substituted with at least one substituent selected from the group consisting of The.

The light emitting layer may include at least one of the compounds represented by the following Group 2 compounds.

[Compound 2]

The light emitting layer may include at least one of the compounds represented by the following Group 3 compounds.

[Compound group 3]

The light emitting layer may further include an arylamine compound.

The arylamine-based compound may include at least one of the compounds represented by the following Group 4 compounds.

[Compound group 4]

The light emitting layer may emit green light.

A display device according to an embodiment of the present invention includes a plurality of pixels. At least one of the pixels is provided on a first electrode, a hole transporting region provided on the first electrode, a light emitting layer provided on the hole transporting region, an electron transporting region provided on the light emitting layer, And a second electrode. The electron transporting region includes a compound represented by the following general formula (1).

[Chemical Formula 1]

In Formula 1, X ₁ and X ₂ are each independently CR ₅ or N, and R ₁ to R ₅ are each independently selected from the group consisting of hydrogen, deuterium, an alkyl group having 1 to 40 carbon atoms, an aryl group having 6 to 40 carbon atoms, An aryloxy group having 1 to 40 carbon atoms, an aryloxy group having 6 to 40 carbon atoms, an arylamino group having 6 to 40 carbon atoms, a diarylamino group having 12 to 40 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms , A cycloalkyl group having 3 to 40 carbon atoms, and a heterocycloalkyl group having 3 to 40 carbon atoms, or may form a condensed aromatic aliphatic ring, A halogen atom or a combination thereof; L is a single bond, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C1-C30 condensed aryl group, A substituted or unsubstituted heteroaryl group containing 1 to 30 carbon atoms, N, S, O, and a substituted or unsubstituted condensed heteroarylene group containing 1 to 30 carbon atoms, N, S, O . Het is a substituted or unsubstituted heteroaryl group containing N having 3 to 20 carbon atoms, A ₁ and Ar ₂ are each independently selected from the group consisting of hydrogen, a substituted or unsubstituted C6 to C40 aryl group or a substituted or unsubstituted And is a heteroaryl group having 1 to 40 carbon atoms.

The electron transporting region may include at least one of the compounds represented by the following Group 1 compounds.

[Compound group 1]

The light emitting layer may include a compound represented by the following general formula (2).

(2)

In Formula 2, AA represents a cycloalkyl group having 3 to 60 carbon atoms, a 5-membered to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, An aryl group having 6 to 60 carbon atoms, or a heteroaryl group having 1 to 60 carbon atoms, or a ring containing X and a ring containing Y, Condensed with the ring to form a condensed aliphatic ring, a condensed aromatic ring, a condensed heteroaliphatic ring or a condensed heteroaromatic ring. X is selected from N (Ar ₃ ), O and S, Y is selected from N (Ar ₄ ), O and S, Ar ₃ and Ar ₄ independently of one another are an alkyl group having 1 to 60 carbon atoms, A 5 to 6 membered heterocycloalkyl group containing at least one member selected from the group consisting of N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms , An alkynyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, and a heteroaryl group having 1 to 60 carbon atoms, Z ₁ to Z ₈ are each independently selected from C (Ar ₅ ) ₁ to Z ₈ Ar ₅ is contained in each may be different from each other, adjacent to Ar ₅ may bond to one another to form a ring, Z ₁ to Z ₈ Ar ₅ included in each is independently hydrogen, a carbon number of 1 to each other A halogen atom, a cyano group, a cycloalkyl group having 3 to 60 carbon atoms , A 5- to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms, An aryl group having 6 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, an alkoxy group having 1 to 60 carbon atoms, an aryloxy group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, A mono or dialkylamino group having 1 to 60 carbon atoms, a monoarylamino group having 6 to 30 carbon atoms, a trialkylsilyl group having 3 to 90 carbon atoms, a dialkylarylsilyl group having 7 to 60 carbon atoms, A mono or diarylboranyl group having 6 to 60 carbon atoms, a mono or dialkylboranyl group having 1 to 120 carbon atoms, a nitro group and a hydroxyl group, provided that when X is N ( Ar ₃ ), Y is N (Ar ₄ ) , And the case where Ar ₃ and Ar ₄ are the same, and all of Z ₁ to Z ₈ are C (Ar ₅ ) and the Ar ₅ included in each of Z ₁ to Z ₈ are the same.

Ar ₃ to Ar ₅ each independently represent an alkyl group, a cycloalkyl group, a heterocycloalkyl group, a bicycloalkyl group, an adamantyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an aryloxy group, a heteroaryl group, An aryl group, an aryl group, an alkylthio group, an alkylamino group, an arylamino group, a trialkylsilyl group, a dialkylarylsilyl group, a triarylsilyl group, an arylboranyl group or an alkylboranyl group is an alkyl group having 1 to 60 carbon atoms, a halogen group, A cycloalkyl group having 3 to 60 carbon atoms, a 5-membered to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, (= O) RaRb wherein Ra and Rb are independently of each other an alkyl group having 1 to 60 carbon atoms, an alkenyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, an alkoxy group having 1 to 60 carbon atoms, Having from 1 to 60 carbon atoms An aryl group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms substituted with an aryl group having 6 to 60 carbon atoms, an aryl group having 1 to 6 carbon atoms substituted with an aryl group having 6 to 60 carbon atoms, An arylthio group having 6 to 60 carbon atoms, an alkylthio group having 1 to 60 carbon atoms, a mono or di (meth) acryloyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 1 to 60 carbon atoms, An alkylamino group, a mono or diarylamino group having 6 to 60 carbon atoms, a trialkylsilyl group having 3 to 90 carbon atoms, a dialkylarylsilyl group having 7 to 60 carbon atoms, a triarylsilyl group having 18 to 90 carbon atoms, A mono or diarylboranyl group, a mono or dialkylboranyl group having 1 to 120 carbon atoms, a nitro group, and a hydroxy group, which may be further substituted with at least one substituent selected from the group consisting of The.

The light emitting layer may include at least one of the compounds represented by the following Group 2 compounds.

[Compound 2]

The light emitting layer may include at least one of the compounds represented by the following Group 3 compounds.

[Compound group 3]

The light emitting layer may further include an arylamine compound.

The arylamine-based compound may include at least one of the compounds represented by the following Group 4 compounds.

[Compound group 4]

The light emitting layer may emit green light.

According to the organic light emitting device of the embodiment of the present invention, the efficiency can be increased and the lifetime can be extended.

According to the display device of the embodiment of the present invention, the efficiency can be increased and the service life can be extended.

1 is a cross-sectional view schematically showing an organic light emitting device according to an embodiment of the present invention.
2 is a cross-sectional view schematically showing an organic light emitting device according to an embodiment of the present invention.
3 is a perspective view schematically showing a display device according to an embodiment of the present invention.
4 is a circuit diagram of one of the pixels included in the display device according to the embodiment of the present invention.
5 is a plan view showing one of pixels included in a display device according to an embodiment of the present invention.
6 is a schematic cross-sectional view corresponding to line I-I 'in FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are shown enlarged from the actual for the sake of clarity of the present invention. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, where a section such as a layer, a film, an area, a plate, or the like is referred to as being "on" another section, it includes not only the case where it is "directly on" another part but also the case where there is another part in between. On the contrary, where a section such as a layer, a film, an area, a plate, etc. is referred to as being "under" another section, this includes not only the case where the section is "directly underneath"

Hereinafter, an organic light emitting device according to an embodiment of the present invention will be described.

1 is a cross-sectional view schematically showing an organic light emitting diode (OLED) according to an embodiment of the present invention.

1, an organic light emitting diode (OLED) according to an exemplary embodiment of the present invention includes a first electrode EL1, a hole transport region HTR, an emission layer EML, an electron transport region ETR, (EL2).

The first electrode EL1 has conductivity. The first electrode EL1 may be a pixel electrode or an anode. The first electrode EL1 may be a transmissive electrode, a transflective electrode, or a reflective electrode. When the first electrode EL1 is a transmissive electrode, the first electrode EL1 is formed of a transparent metal oxide such as ITO (indium tin oxide), IZO (indium zinc oxide), ZnO (zinc oxide), ITZO tin zinc oxide, and the like. When the first electrode EL1 is a transflective electrode or a reflective electrode, the first electrode EL1 includes a mixture of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, .

An organic layer may be disposed on the first electrode EL1. The organic layer includes a light emitting layer (EML). The organic layer may further include a hole transporting region (HTR) and an electron transporting region (ETR).

The hole transporting region HTR is provided on the first electrode EL1. The hole transport region HTR may include at least one of a hole injection layer (HIL), a hole transport layer (HTL), a buffer layer, and an electron blocking layer.

The hole transporting region (HTR) may have a single layer of a single material, a single layer of a plurality of different materials, or a multi-layer structure having a plurality of layers of a plurality of different materials.

For example, the hole transporting region HTR may have a structure of a single layer made of a plurality of different materials, a hole injection layer (HIL) / a hole transporting layer (HTL) sequentially stacked from the first electrode EL1, The structure of the hole injection layer (HIL) / hole transport layer (HTL) / buffer layer, hole injection layer (HIL) / buffer layer, hole transport layer (HTL) / buffer layer or hole injection layer (HIL) / hole transport layer (HTL) But is not limited thereto.

The hole transporting region HTR can be formed by a variety of methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett, inkjet printing, laser printing, and laser induced thermal imaging .

When the hole transporting region HTR includes a hole injection layer HIL, the hole transporting region HTR may include a phthalocyanine compound such as copper phthalocyanine, N, N'-diphenyl-N, 4,4'-diamine), m-MTDATA (4,4 ', 4' '- tris (3-methylphenylphenylamino) triphenylamine ), TDATA (4,4'4 "-Tris (N, N-diphenylamino) triphenylamine), 2TNATA (4,4 ' , PEDOT / PSS (Poly (3,4-ethylenedioxythiophene)), PANI / DBSA (Polyaniline / Dodecylbenzenesulfonic acid), PANI / CSA (Polyaniline / Camphor sulfonicacid), PANI / PSS Poly (4-styrenesulfonate)), and the like, but the present invention is not limited thereto.

When the hole transporting region HTR includes a hole transporting layer HTL, the hole transporting region HTR may be a carbazole-based derivative such as N-phenylcarbazole or polyvinylcarbazole, a fluorine-based derivative, a TPD N, N'-bis (3-methylphenyl) -N, N'-diphenyl- [1,1-biphenyl] -4,4'-diamine), TCTA (4,4 ' ) triphenylamine), NPB (N-N'-di (N-diphenylbenzidine), TAPC (4,4'- -methylphenyl) benzenamine]), and the like, but the present invention is not limited thereto.

The thickness of the hole transporting region (HTR) may be from about 100 A to about 10,000 A, e.g., from about 100 A to about 1000 A. When the hole transporting region HTR includes both the hole injecting layer HIL and the hole transporting layer HTL, the thickness of the hole injecting layer HIL is about 100 Å to about 10,000 Å, for example, about 100 Å to about 1000 Å, The thickness of the hole transporting layer (HTL) may be about 50 Å to about 2000 Å, for example, about 100 Å to about 1500 Å. When the thickness of the hole transporting region (HTR), the hole injecting layer (HIL), and the hole transporting layer (HTL) satisfy the above-described ranges, satisfactory hole transporting characteristics can be obtained without substantial increase in drive voltage.

In addition to the above-mentioned materials, the hole transporting region (HTR) may further include a charge generating material for improving conductivity. The charge generating material may be uniformly or non-uniformly dispersed in the hole transporting region (HTR). The charge generating material may be, for example, a p-dopant. The p-dopant may be, but is not limited to, one of quinone derivatives, metal oxides, and cyano group-containing compounds. For example, non-limiting examples of the p-dopant include quinone derivatives such as TCNQ (tetracyanoquinodimethane) and F4-TCNQ (2,3,4,6-tetrafluoro-tetracyanoquinodimethane), metal oxides such as tungsten oxide and molybdenum oxide But the present invention is not limited thereto.

As described above, the hole transporting region HTR may further include at least one of a buffer layer and an electron blocking layer in addition to the hole injecting layer (HIL) and the hole transporting layer (HTL). The buffer layer may serve to increase the light emission efficiency by compensating the resonance distance according to the wavelength of the light emitted from the light emitting layer (EML). As a substance included in the buffer layer, a material that can be included in the hole transporting region (HTR) can be used. The electron blocking layer is a layer that prevents the injection of electrons from the electron transporting region (ETR) to the hole transporting region (HTR).

The light emitting layer (EML) is provided on the hole transporting region (HTR). The light emitting layer (EML) may have a single layer made of a single material, a single layer made of a plurality of different materials, or a multi-layered structure having a plurality of layers made of a plurality of different materials.

The light emitting layer (EML) may be formed using various methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB), inkjet printing, laser printing, and laser induced thermal imaging (LITI) .

The light emitting layer (EML) may emit green light. The light emitting layer (EML) may be made of a material that emits green light, and may include a fluorescent material or a phosphorescent material. Further, the light emitting layer (EML) may include a host and a dopant.

The host may include a compound represented by the following formula (2).

(2)

In Formula 2, AA represents a cycloalkyl group having 3 to 60 carbon atoms, a 5-membered to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, An aryl group having 6 to 60 carbon atoms, or a heteroaryl group having 1 to 60 carbon atoms, or a ring containing X and a ring containing Y, Condensed with the ring to form a condensed aliphatic ring, a condensed aromatic ring, a condensed heteroaliphatic ring or a condensed heteroaromatic ring.

X is selected from N (Ar ₃ ), O and S, Y is selected from N (Ar ₄ ), O and S, Ar ₃ and Ar ₄ independently of one another are an alkyl group having 1 to 60 carbon atoms, A 5 to 6 membered heterocycloalkyl group containing at least one member selected from the group consisting of N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms , An alkynyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, and a heteroaryl group having 1 to 60 carbon atoms, Z ₁ to Z ₈ are each independently selected from C (Ar ₅ ) ₁ to Z ₈ Ar ₅ is contained in each may be different from each other, adjacent to Ar ₅ may bond to one another to form a ring, Z ₁ to Z ₈ Ar ₅ included in each is independently hydrogen, a carbon number of 1 to each other A halogen atom, a cyano group, a cycloalkyl group having 3 to 60 carbon atoms , A 5- to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms, An aryl group having 6 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, an alkoxy group having 1 to 60 carbon atoms, an aryloxy group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, A mono or dialkylamino group having 1 to 60 carbon atoms, a monoarylamino group having 6 to 30 carbon atoms, a trialkylsilyl group having 3 to 90 carbon atoms, a dialkylarylsilyl group having 7 to 60 carbon atoms, A mono or diarylboranyl group having 6 to 60 carbon atoms, a mono or dialkylboranyl group having 1 to 120 carbon atoms, a nitro group and a hydroxyl group, provided that when X is N ( Ar ₃ ), Y is N (Ar ₄ ) , And the case where Ar ₃ and Ar ₄ are the same, and all of Z ₁ to Z ₈ are C (Ar ₅ ) and the Ar ₅ included in each of Z ₁ to Z ₈ are the same.

Ar ₃ to Ar ₅ each independently represent an alkyl group, a cycloalkyl group, a heterocycloalkyl group, a bicycloalkyl group, an adamantyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an aryloxy group, a heteroaryl group, An aryl group, an aryl group, an alkylthio group, an alkylamino group, an arylamino group, a trialkylsilyl group, a dialkylarylsilyl group, a triarylsilyl group, an arylboranyl group or an alkylboranyl group is an alkyl group having 1 to 60 carbon atoms, a halogen group, A cycloalkyl group having 3 to 60 carbon atoms, a 5-membered to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, (= O) RaRb wherein Ra and Rb are independently of each other an alkyl group having 1 to 60 carbon atoms, an alkenyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, an alkoxy group having 1 to 60 carbon atoms, Having from 1 to 60 carbon atoms An aryl group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms substituted with an aryl group having 6 to 60 carbon atoms, an aryl group having 1 to 6 carbon atoms substituted with an aryl group having 6 to 60 carbon atoms, An arylthio group having 6 to 60 carbon atoms, an alkylthio group having 1 to 60 carbon atoms, a mono or di (meth) acryloyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 1 to 60 carbon atoms, An alkylamino group, a mono or diarylamino group having 6 to 60 carbon atoms, a trialkylsilyl group having 3 to 90 carbon atoms, a dialkylarylsilyl group having 7 to 60 carbon atoms, a triarylsilyl group having 18 to 90 carbon atoms, A mono or diarylboranyl group, a mono or dialkylboranyl group having 1 to 120 carbon atoms, a nitro group, and a hydroxy group, which may be further substituted with at least one substituent selected from the group consisting of The.

The host may comprise at least one of the compounds represented by the following group 2 of compounds.

[Compound 2]

The host may comprise at least one of the compounds represented by the following group 3 of compounds.

[Compound group 3]

The light emitting layer (EML) may further include at least one of an arylamine-based compound and a styrylarylamine-based compound.

The arylamine-based compound may include at least one of the compounds represented by the following group of compounds 4.

[Compound group 4]

An electron transporting region (ETR) is provided on the light-emitting layer (EML). The electron transport region (ETR) may include, but is not limited to, at least one of a hole blocking layer, an electron transport layer (ETL), and an electron injection layer (EIL).

For example, the electron transporting region (ETR) is formed by sequentially stacking an electron transport layer (ETL) / electron injection layer (EIL) or a hole blocking layer / electron transport layer (ETL) / electron injection layer (EIL) Structure, or may have a single layer structure in which two or more layers of the layers are mixed, but the present invention is not limited thereto.

The electron transport region (ETR) can be formed by a variety of methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett, inkjet printing, laser printing, and laser induced thermal imaging .

When the electron transporting region (ETR) comprises an electron transporting layer (ETL), the electron transporting region (ETR) comprises a compound represented by the following formula (1).

[Chemical Formula 1]

In Formula 1, X ₁ and X ₂ are each independently CR ₅ or N, and R ₁ to R ₅ are each independently selected from the group consisting of hydrogen, deuterium, an alkyl group having 1 to 40 carbon atoms, an aryl group having 6 to 40 carbon atoms, An aryloxy group having 1 to 40 carbon atoms, an aryloxy group having 6 to 40 carbon atoms, an arylamino group having 6 to 40 carbon atoms, a diarylamino group having 12 to 40 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms , A cycloalkyl group having 3 to 40 carbon atoms, and a heterocycloalkyl group having 3 to 40 carbon atoms, or may form a condensed aromatic aliphatic ring, A halogen atom or a combination thereof; L is a single bond, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C1-C30 condensed aryl group, A substituted or unsubstituted heteroaryl group containing 1 to 30 carbon atoms, N, S, O, and a substituted or unsubstituted condensed heteroarylene group containing 1 to 30 carbon atoms, N, S, O .

L is an aryl group substituted with at least one substituent selected from the group consisting of an alkyl group, a hydroxyl group, a cyano group, an alkoxy group, a halogen group, a carboxyl group, an alkoxycarbonyl group, a thionyl group, A condensed aryl group, a heteroaryl group or a condensed heteroarylene group.

Het is a substituted or unsubstituted heteroaryl group containing N having 3 to 20 carbon atoms, A ₁ and Ar ₂ are each independently selected from the group consisting of hydrogen, a substituted or unsubstituted C6 to C40 aryl group or a substituted or unsubstituted And is a heteroaryl group having 1 to 40 carbon atoms.

The electron transport region (ETR) may comprise at least one of the compounds represented by the following Group 1 compounds.

[Compound group 1]

The thickness of the electron transport layer (ETL) may be from about 100 ANGSTROM to about 1000 ANGSTROM, for example, from about 150 ANGSTROM to about 500 ANGSTROM. When the thickness of the electron transport layer (ETL) satisfies the above-described range, satisfactory electron transport characteristics can be obtained without substantial increase in driving voltage.

The electron transport region (ETR) The electron injection layer when comprise (EIL), an electron transport region (ETR) is a lanthanide metal such as LiF, LiQ (Lithium quinolate), Li 2 O, BaO, NaCl, CsF, Yb, Or metal halides such as RbCl and RbI, but the present invention is not limited thereto. The electron injection layer (EIL) may also be made of a mixture of an electron transport material and an insulating organometallic salt. The organometallic salt may be a material having an energy band gap of about 4 eV or more. Specifically, for example, the organometallic salt includes a metal acetate, a metal benzoate, a metal acetoacetate, a metal acetylacetonate or a metal stearate . The thickness of the electron injection layer (EIL) may be from about 1 A to about 100 A, and from about 3 A to about 90 A. When the thickness of the electron injection layer (EIL) satisfies the above-described range, satisfactory electron injection characteristics can be obtained without substantial increase in driving voltage.

The electron transport region (ETR) may include a hole blocking layer, as mentioned above. The hole blocking layer may comprise, for example, at least one of BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline) and Bphen (4,7-diphenyl-1,10-phenanthroline) However, the present invention is not limited thereto. The thickness of the hole blocking layer may be from about 20 ANGSTROM to about 1000 ANGSTROM, for example from about 30 ANGSTROM to about 300 ANGSTROM. When the thickness of the hole blocking layer satisfies the above-described range, excellent hole blocking characteristics can be obtained without increasing the driving voltage substantially.

And the second electrode EL2 is provided on the electron transporting region ETR. The second electrode EL2 may be a common electrode or a cathode. The second electrode EL2 may be a transmissive electrode, a transflective electrode, or a reflective electrode.

In the case where the second electrode EL2 is a transmissive electrode, the second electrode EL2 may be formed of any of Li, Ca, LiF / Ca, LiF / Al, Al, Mg, BaF, Ba, Ag, , A mixture of Ag and Mg).

The second electrode EL2 may include an auxiliary electrode. The auxiliary electrode includes a film formed by depositing the material so as to face the emission layer (EML), and a transparent metal oxide such as ITO (indium tin oxide), IZO (indium zinc oxide), ZnO (zinc oxide) , ITZO (indium tin zinc oxide), Mo, Ti, and the like.

The second electrode EL2 may be formed of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF / Ca, LiF / Al, Mo, Ti, or a compound or mixture thereof (for example, a mixture of Ag and Mg). Or a transparent conductive film formed of a reflective film or a semi-transmissive film formed of the above material and indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide Lt; / RTI >

Holes are injected from the first electrode EL1 as a voltage is applied to the first electrode EL1 and the second electrode EL2 in the organic light emitting device OEL according to an embodiment of the present invention, The electrons injected from the second electrode EL2 are transferred to the emissive layer EML through the electron transport region ETR while being transported to the emission layer EML through the hole transport region HTR. Electrons and holes are recombined in the light emitting layer (EML) to generate an exciton, and the excitons emit as they fall from the excited state to the ground state.

The organic light emitting device according to one embodiment of the present invention includes an electron transporting region including the compound represented by Formula 1. The organic light emitting device according to an embodiment of the present invention includes a light emitting layer containing a compound represented by Formula 2. Accordingly, the organic light emitting device can reduce the band gap between the energy band of the hole transporting region and the energy band of the light emitting layer, and can easily inject holes into the light emitting layer. The band gap between the energy band of the light emitting layer and the energy band of the electron transporting region can be reduced and the injection of electrons into the light emitting layer can be facilitated. Accordingly, the organic light emitting diode according to one embodiment of the present invention can achieve high efficiency and long life.

Hereinafter, a display device according to an embodiment of the present invention will be described. Hereinafter, differences from the organic light emitting diode (OLED) according to one embodiment of the present invention will be described in detail below, and a description of the organic light emitting diode (OLED) according to an embodiment of the present invention .

3 is a perspective view schematically showing a display device according to an embodiment of the present invention.

Referring to FIG. 3, a display device 10 according to an embodiment of the present invention includes a display area DA and a non-display area NDA.

The display area DA displays an image. When viewed in the thickness direction of the display device 10 (for example, DR3), the display area DA may have a substantially rectangular shape, but is not limited thereto.

The display area DA includes a plurality of pixel areas PA. The pixel regions PA may be arranged in a matrix form. The pixel regions PA can be defined by a pixel defining layer (PDL in Fig. 6). The pixel regions PA may each include a plurality of pixels (PX in Fig. 4).

The non-display area NDA does not display an image. When viewed in the thickness direction of the display device 10 (DR3), the non-display area NDA may surround the display area DA, for example. The non-display area NDA may be adjacent to the display area DA in a second direction (e.g., DR2) that intersects the first direction (e.g., DR1) and the first direction (e.g., DR1).

4 is a circuit diagram of one of the pixels included in the display device according to the embodiment of the present invention.

5 is a plan view showing one of pixels included in a display device according to an embodiment of the present invention.

6 is a schematic cross-sectional view corresponding to line I-I 'in FIG.

4 to 6, each of the pixels PX includes a wiring part composed of a gate line GL, a data line DL and a driving voltage line DVL, and thin film transistors TFT1, TFT2 ), An organic light emitting element OEL connected to the thin film transistors TFT1 and TFT2, and a capacitor Cst.

Each of the pixels PX can emit light of a specific color, for example, either red light, green light, or blue light. The type of the color light is not limited to the above, and for example, cyan light, magenta light, yellow light, and the like may be added.

The gate line GL extends in the first direction DR1. The data line DL extends in the second direction DR2 intersecting the gate line GL. The driving voltage line DVL extends substantially in the same direction as the data line DL, i.e., in the second direction DR2. The gate line GL transmits a scan signal to the thin film transistors TFT1 and TFT2 and the data line DL transmits a data signal to the thin film transistors TFT1 and TFT2 while the drive voltage line DVL is connected to the thin film transistor Thereby providing a driving voltage.

The thin film transistors TFT1 and TFT2 may include a driving thin film transistor TFT2 for controlling the organic light emitting element OEL and a switching thin film transistor TFT1 for switching the driving thin film transistor TFT2. The present invention is not limited to this, and each pixel PX may include a single thin film transistor and a capacitor (not shown). In the present embodiment, each of the pixels PX includes two thin film transistors TFT1 and TFT2, Or each of the pixels PX may include three or more thin film transistors and two or more capacitors.

The switching thin film transistor TFT1 includes a first gate electrode GE1, a first source electrode SE1, and a first drain electrode DE1. The first gate electrode GE1 is connected to the gate line GL and the first source electrode SE1 is connected to the data line DL. The first drain electrode DE1 is connected to the first common electrode CE1 by a fifth contact hole CH5. The switching thin film transistor TFT1 transfers a data signal applied to the data line DL to the driving thin film transistor TFT2 according to a scanning signal applied to the gate line GL.

The driving thin film transistor TFT2 includes a second gate electrode GE2, a second source electrode SE2 and a second drain electrode DE2. The second gate electrode GE2 is connected to the first common electrode CE1. And the second source electrode SE2 is connected to the driving voltage line DVL. The second drain electrode DE2 is connected to the first electrode EL1 by the third contact hole CH3.

The first electrode EL1 is connected to the second drain electrode DE2 of the driving thin film transistor TFT2. A common voltage is applied to the second electrode EL2, and the light emitting layer (EML) emits blue light in accordance with the output signal of the driving thin film transistor TFT2 to display an image. The first electrode EL1 and the second electrode EL2 will be described later in more detail.

The capacitor Cst is connected between the second gate electrode GE2 and the second source electrode SE2 of the driving thin film transistor TFT2 and is connected to the data input to the second gate electrode GE2 of the driving thin film transistor TFT2 Charge and hold the signal. The capacitor Cst includes a first common electrode CE1 connected to the first drain electrode DE1 through a sixth contact hole CH6 and a second common electrode CE2 connected to the driving voltage line DVL can do.

5 and 6, a display device 10 according to an exemplary embodiment of the present invention includes a base substrate (BS) in which a thin film transistor and an organic light emitting diode (OLED) are stacked. The base substrate BS is not particularly limited as long as it is commonly used, but may be formed of an insulating material such as glass, plastic, quartz, or the like. Examples of the organic polymer constituting the base substrate (BS) include PET (polyethylene terephthalate), PEN (polyethylene naphthalate), polyimide, and polyether sulfone. The base substrate (BS) can be selected in consideration of mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and water resistance.

A substrate buffer layer (not shown) may be provided on the base substrate BS. The substrate buffer layer (not shown) prevents impurities from diffusing into the switching thin film transistor TFT1 and the driving thin film transistor TFT2. The substrate buffer layer (not shown) may be formed of silicon nitride (SiNx), silicon oxide (SiOx), silicon oxynitride (SiOxNy) or the like and may be omitted depending on the material of the base substrate BS and process conditions.

On the base substrate BS, a first semiconductor layer SM1 and a second semiconductor layer SM2 are provided. The first semiconductor layer SM1 and the second semiconductor layer SM2 are formed of a semiconductor material and act as active layers of the switching thin film transistor TFT1 and the driving thin film transistor TFT2, respectively. The first semiconductor layer SM1 and the second semiconductor layer SM2 each include a source region SA and a drain region DA and a channel region CA provided between the source region SA and the drain region DA do. The first semiconductor layer SM1 and the second semiconductor layer SM2 may be formed of an inorganic semiconductor or an organic semiconductor, respectively. The source region SA and the drain region DA may be doped with an n-type impurity or a p-type impurity.

A gate insulating layer GI is provided on the first semiconductor layer SM1 and the second semiconductor layer SM2. The gate insulating layer GI covers the first semiconductor layer SM1 and the second semiconductor layer SM2. The gate insulating layer (GI) may be formed of an organic insulating material or an inorganic insulating material.

A first gate electrode GE1 and a second gate electrode GE2 are provided on the gate insulating layer GI. The first gate electrode GE1 and the second gate electrode GE2 are formed to cover the regions corresponding to the channel regions CA of the first semiconductor layer SM1 and the second semiconductor layer SM2, respectively.

An interlayer insulating layer IL is provided on the first gate electrode GE1 and the second gate electrode GE2. The interlayer insulating layer IL covers the first gate electrode GE1 and the second gate electrode GE2. The interlayer insulating layer IL may be formed of an organic insulating material or an inorganic insulating material.

A first source electrode SE1 and a first drain electrode DE1, a second source electrode SE2 and a second drain electrode DE2 are provided on the interlayer insulating layer IL. The second drain electrode DE2 is in contact with the drain region DA of the second semiconductor layer SM2 by the first contact hole CH1 formed in the gate insulating layer GI and the interlayer insulating layer IL, 2 source electrode SE2 is in contact with the source region SA of the second semiconductor layer SM2 by the gate insulating layer GI and the second contact hole CH2 formed in the interlayer insulating layer IL. The first source electrode SE1 is in contact with the source region (not shown) of the first semiconductor layer SM1 by the fourth contact hole CH4 formed in the gate insulating layer GI and the interlayer insulating layer IL, The first drain electrode DE1 contacts the drain region (not shown) of the first semiconductor layer SM1 by the fifth contact hole CH5 formed in the gate insulating layer GI and the interlayer insulating layer IL.

A passivation layer PL is provided on the first source electrode SE1 and the first drain electrode DE1, the second source electrode SE2 and the second drain electrode DE2. The passivation layer PL may serve as a protective film for protecting the switching thin film transistor TFT1 and the driving thin film transistor TFT2 or may serve as a flattening film for flattening the upper surface thereof.

A first electrode EL1 is provided on the passivation layer PL. The first electrode EL1 may be, for example, a cathode. The first electrode EL1 is connected to the second drain electrode DE2 of the driving TFT TR2 through the third contact hole CH3 formed in the passivation layer PL.

On the passivation layer PL, there is provided a pixel defining layer (PDL) for partitioning pixel regions (PA in Fig. 3) to correspond to each of the pixels PX. The pixel defining layer PDL exposes the upper surface of the first electrode EL1 and protrudes from the base substrate BS along the periphery of each of the pixels PX. The pixel defining layer (PDL) may include, but is not limited to, a metal-fluorine ion compound. For example, the pixel defining layer (PDL) is any one metal of LiF, BaF _2, CsF, and - may be of a fluoride compound. The metal-fluorine ion compound has an insulating property when it has a predetermined thickness. The thickness of the pixel defining layer (PDL) may be, for example, 10 nm to 100 nm.

The organic light emitting element OEL is provided in each of the pixel regions (PA in Fig. 3) surrounded by the pixel definition film (PDL). The organic light emitting diode OEL includes a first electrode EL1, a hole transporting region HTR, a light emitting layer EML, an electron transporting region ETR and a second electrode EL2.

The first electrode EL1 has conductivity. The first electrode EL1 may be a pixel electrode or an anode. The first electrode EL1 may be a transmissive electrode, a transflective electrode, or a reflective electrode. When the first electrode EL1 is a transmissive electrode, the first electrode EL1 is formed of a transparent metal oxide such as ITO (indium tin oxide), IZO (indium zinc oxide), ZnO (zinc oxide), ITZO tin zinc oxide, and the like. When the first electrode EL1 is a transflective electrode or a reflective electrode, the first electrode EL1 includes a mixture of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, .

An organic layer may be disposed on the first electrode EL1. The organic layer includes a light emitting layer (EML). The organic layer may further include a hole transporting region (HTR) and an electron transporting region (ETR).

The hole transporting region HTR is provided on the first electrode EL1. The hole transport region HTR may include at least one of a hole injection layer (HIL), a hole transport layer (HTL), a buffer layer, and an electron blocking layer.

The hole transporting region (HTR) may have a single layer of a single material, a single layer of a plurality of different materials, or a multi-layer structure having a plurality of layers of a plurality of different materials.

For example, the hole transporting region HTR may have a structure of a single layer made of a plurality of different materials, a hole injection layer (HIL) / a hole transporting layer (HTL) sequentially stacked from the first electrode EL1, The structure of the hole injection layer (HIL) / hole transport layer (HTL) / buffer layer, hole injection layer (HIL) / buffer layer, hole transport layer (HTL) / buffer layer or hole injection layer (HIL) / hole transport layer (HTL) But is not limited thereto.

The hole transporting region HTR can be formed by a variety of methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett, inkjet printing, laser printing, and laser induced thermal imaging .

When the hole transporting region HTR includes a hole injection layer HIL, the hole transporting region HTR may include a phthalocyanine compound such as copper phthalocyanine, N, N'-diphenyl-N, 4,4'-diamine), m-MTDATA (4,4 ', 4' '- tris (3-methylphenylphenylamino) triphenylamine ), TDATA (4,4'4 "-Tris (N, N-diphenylamino) triphenylamine), 2TNATA (4,4 ' , PEDOT / PSS (Poly (3,4-ethylenedioxythiophene)), PANI / DBSA (Polyaniline / Dodecylbenzenesulfonic acid), PANI / CSA (Polyaniline / Camphor sulfonicacid), PANI / PSS Poly (4-styrenesulfonate)), and the like, but the present invention is not limited thereto.

When the hole transporting region HTR includes a hole transporting layer HTL, the hole transporting region HTR may be a carbazole-based derivative such as N-phenylcarbazole or polyvinylcarbazole, a fluorine-based derivative, a TPD N, N'-bis (3-methylphenyl) -N, N'-diphenyl- [1,1-biphenyl] -4,4'-diamine), TCTA (4,4 ' ) triphenylamine), NPB (N-N'-di (N-diphenylbenzidine), TAPC (4,4'- -methylphenyl) benzenamine]), and the like, but the present invention is not limited thereto.

The thickness of the hole transporting region (HTR) may be from about 100 A to about 10,000 A, e.g., from about 100 A to about 1000 A. When the hole transporting region HTR includes both the hole injecting layer HIL and the hole transporting layer HTL, the thickness of the hole injecting layer HIL is about 100 Å to about 10,000 Å, for example, about 100 Å to about 1000 Å, The thickness of the hole transporting layer (HTL) may be about 50 Å to about 2000 Å, for example, about 100 Å to about 1500 Å. When the thickness of the hole transporting region (HTR), the hole injecting layer (HIL), and the hole transporting layer (HTL) satisfy the above-described ranges, satisfactory hole transporting characteristics can be obtained without substantial increase in drive voltage.

In addition to the above-mentioned materials, the hole transporting region (HTR) may further include a charge generating material for improving conductivity. The charge generating material may be uniformly or non-uniformly dispersed in the hole transporting region (HTR). The charge generating material may be, for example, a p-dopant. The p-dopant may be, but is not limited to, one of quinone derivatives, metal oxides, and cyano group-containing compounds. For example, non-limiting examples of the p-dopant include quinone derivatives such as TCNQ (tetracyanoquinodimethane) and F4-TCNQ (2,3,4,6-tetrafluoro-tetracyanoquinodimethane), metal oxides such as tungsten oxide and molybdenum oxide But the present invention is not limited thereto.

As described above, the hole transporting region HTR may further include at least one of a buffer layer and an electron blocking layer in addition to the hole injecting layer (HIL) and the hole transporting layer (HTL). The buffer layer may serve to increase the light emission efficiency by compensating the resonance distance according to the wavelength of the light emitted from the light emitting layer (EML). As a substance included in the buffer layer, a material that can be included in the hole transporting region (HTR) can be used. The electron blocking layer is a layer that prevents the injection of electrons from the electron transporting region (ETR) to the hole transporting region (HTR).

The light emitting layer (EML) is provided on the hole transporting region (HTR). The light emitting layer (EML) may have a single layer made of a single material, a single layer made of a plurality of different materials, or a multi-layered structure having a plurality of layers made of a plurality of different materials.

The light emitting layer (EML) may be formed using various methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB), inkjet printing, laser printing, and laser induced thermal imaging (LITI) .

The light emitting layer (EML) may emit green light. The light emitting layer (EML) may be made of a material that emits green light, and may include a fluorescent material or a phosphorescent material. Further, the light emitting layer (EML) may include a host and a dopant.

The host may include a compound represented by the following formula (2).

(2)

In Formula 2, AA represents a cycloalkyl group having 3 to 60 carbon atoms, a 5-membered to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, An aryl group having 6 to 60 carbon atoms, or a heteroaryl group having 1 to 60 carbon atoms, or a ring containing X and a ring containing Y, Condensed with the ring to form a condensed aliphatic ring, a condensed aromatic ring, a condensed heteroaliphatic ring or a condensed heteroaromatic ring.

X is selected from N (Ar ₃ ), O and S, Y is selected from N (Ar ₄ ), O and S, Ar ₃ and Ar ₄ independently of one another are an alkyl group having 1 to 60 carbon atoms, A 5 to 6 membered heterocycloalkyl group containing at least one member selected from the group consisting of N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms , An alkynyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, and a heteroaryl group having 1 to 60 carbon atoms, Z ₁ to Z ₈ are each independently selected from C (Ar ₅ ) ₁ to Z ₈ Ar ₅ is contained in each may be different from each other, adjacent to Ar ₅ may bond to one another to form a ring, Z ₁ to Z ₈ Ar ₅ included in each is independently hydrogen, a carbon number of 1 to each other A halogen atom, a cyano group, a cycloalkyl group having 3 to 60 carbon atoms , A 5- to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms, An aryl group having 6 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, an alkoxy group having 1 to 60 carbon atoms, an aryloxy group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, A mono or dialkylamino group having 1 to 60 carbon atoms, a monoarylamino group having 6 to 30 carbon atoms, a trialkylsilyl group having 3 to 90 carbon atoms, a dialkylarylsilyl group having 7 to 60 carbon atoms, A mono or diarylboranyl group having 6 to 60 carbon atoms, a mono or dialkylboranyl group having 1 to 120 carbon atoms, a nitro group and a hydroxyl group, provided that when X is N ( Ar ₃ ), Y is N (Ar ₄ ) , And the case where Ar ₃ and Ar ₄ are the same, and all of Z ₁ to Z ₈ are C (Ar ₅ ) and the Ar ₅ included in each of Z ₁ to Z ₈ are the same.

Ar ₃ to Ar ₅ each independently represent an alkyl group, a cycloalkyl group, a heterocycloalkyl group, a bicycloalkyl group, an adamantyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an aryloxy group, a heteroaryl group, An aryl group, an aryl group, an alkylthio group, an alkylamino group, an arylamino group, a trialkylsilyl group, a dialkylarylsilyl group, a triarylsilyl group, an arylboranyl group or an alkylboranyl group is an alkyl group having 1 to 60 carbon atoms, a halogen group, A cycloalkyl group having 3 to 60 carbon atoms, a 5-membered to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, (= O) RaRb wherein Ra and Rb are independently of each other an alkyl group having 1 to 60 carbon atoms, an alkenyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, an alkoxy group having 1 to 60 carbon atoms, Having from 1 to 60 carbon atoms An aryl group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms substituted with an aryl group having 6 to 60 carbon atoms, an aryl group having 1 to 6 carbon atoms substituted with an aryl group having 6 to 60 carbon atoms, An arylthio group having 6 to 60 carbon atoms, an alkylthio group having 1 to 60 carbon atoms, a mono or di (meth) acryloyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 1 to 60 carbon atoms, An alkylamino group, a mono or diarylamino group having 6 to 60 carbon atoms, a trialkylsilyl group having 3 to 90 carbon atoms, a dialkylarylsilyl group having 7 to 60 carbon atoms, a triarylsilyl group having 18 to 90 carbon atoms, A mono or diarylboranyl group, a mono or dialkylboranyl group having 1 to 120 carbon atoms, a nitro group, and a hydroxy group, which may be further substituted with at least one substituent selected from the group consisting of The.

The host may comprise at least one of the compounds represented by the following group 2 of compounds.

[Compound 2]

The host may comprise at least one of the compounds represented by the following group 3 of compounds.

[Compound group 3]

The light emitting layer (EML) may further include at least one of an arylamine-based compound and a styrylarylamine-based compound.

The arylamine-based compound may include at least one of the compounds represented by the following group of compounds 4.

[Compound group 4]

An electron transporting region (ETR) is provided on the light-emitting layer (EML). The electron transport region (ETR) may include, but is not limited to, at least one of a hole blocking layer, an electron transport layer (ETL), and an electron injection layer (EIL).

For example, the electron transporting region (ETR) is formed by sequentially stacking an electron transport layer (ETL) / electron injection layer (EIL) or a hole blocking layer / electron transport layer (ETL) / electron injection layer (EIL) Structure, or may have a single layer structure in which two or more layers of the layers are mixed, but the present invention is not limited thereto.

The electron transport region (ETR) can be formed by a variety of methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett, inkjet printing, laser printing, and laser induced thermal imaging .

When the electron transporting region (ETR) comprises an electron transporting layer (ETL), the electron transporting region (ETR) comprises a compound represented by the following formula (1).

[Chemical Formula 1]

In Formula 1, X ₁ and X ₂ are each independently CR ₅ or N, and R ₁ to R ₅ are each independently selected from the group consisting of hydrogen, deuterium, an alkyl group having 1 to 40 carbon atoms, an aryl group having 6 to 40 carbon atoms, An aryloxy group having 1 to 40 carbon atoms, an aryloxy group having 6 to 40 carbon atoms, an arylamino group having 6 to 40 carbon atoms, a diarylamino group having 12 to 40 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms , A cycloalkyl group having 3 to 40 carbon atoms, and a heterocycloalkyl group having 3 to 40 carbon atoms, or may form a condensed aromatic aliphatic ring, A halogen atom or a combination thereof; L is a single bond, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C1-C30 condensed aryl group, A substituted or unsubstituted heteroaryl group containing 1 to 30 carbon atoms, N, S, O, and a substituted or unsubstituted condensed heteroarylene group containing 1 to 30 carbon atoms, N, S, O .

L is an aryl group substituted with at least one substituent selected from the group consisting of an alkyl group, a hydroxyl group, a cyano group, an alkoxy group, a halogen group, a carboxyl group, an alkoxycarbonyl group, a thionyl group, A condensed aryl group, a heteroaryl group or a condensed heteroarylene group.

Het is a substituted or unsubstituted heteroaryl group containing N having 3 to 20 carbon atoms, A ₁ and Ar ₂ are each independently selected from the group consisting of hydrogen, a substituted or unsubstituted C6 to C40 aryl group or a substituted or unsubstituted And is a heteroaryl group having 1 to 40 carbon atoms.

The electron transport region (ETR) may comprise at least one of the compounds represented by the following Group 1 compounds.

[Compound group 1]

The thickness of the electron transport layer (ETL) may be from about 100 ANGSTROM to about 1000 ANGSTROM, for example, from about 150 ANGSTROM to about 500 ANGSTROM. When the thickness of the electron transport layer (ETL) satisfies the above-described range, satisfactory electron transport characteristics can be obtained without substantial increase in driving voltage.

The electron transport region (ETR) The electron injection layer when comprise (EIL), an electron transport region (ETR) is a lanthanide metal such as LiF, LiQ (Lithium quinolate), Li 2 O, BaO, NaCl, CsF, Yb, Or metal halides such as RbCl and RbI, but the present invention is not limited thereto. The electron injection layer (EIL) may also be made of a mixture of an electron transport material and an insulating organometallic salt. The organometallic salt may be a material having an energy band gap of about 4 eV or more. Specifically, for example, the organometallic salt includes a metal acetate, a metal benzoate, a metal acetoacetate, a metal acetylacetonate or a metal stearate . The thickness of the electron injection layer (EIL) may be from about 1 A to about 100 A, and from about 3 A to about 90 A. When the thickness of the electron injection layer (EIL) satisfies the above-described range, satisfactory electron injection characteristics can be obtained without substantial increase in driving voltage.

The electron transport region (ETR) may include a hole blocking layer, as mentioned above. The hole blocking layer may comprise, for example, at least one of BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline) and Bphen (4,7-diphenyl-1,10-phenanthroline) However, the present invention is not limited thereto. The thickness of the hole blocking layer may be from about 20 ANGSTROM to about 1000 ANGSTROM, for example from about 30 ANGSTROM to about 300 ANGSTROM. When the thickness of the hole blocking layer satisfies the above-described range, excellent hole blocking characteristics can be obtained without increasing the driving voltage substantially.

And the second electrode EL2 is provided on the electron transporting region ETR. The second electrode EL2 may be a common electrode or a cathode. The second electrode EL2 may be a transmissive electrode, a transflective electrode, or a reflective electrode.

In the case where the second electrode EL2 is a transmissive electrode, the second electrode EL2 may be formed of any of Li, Ca, LiF / Ca, LiF / Al, Al, Mg, BaF, Ba, Ag, , A mixture of Ag and Mg).

The second electrode EL2 may include an auxiliary electrode. The auxiliary electrode includes a film formed by depositing the material so as to face the emission layer (EML), and a transparent metal oxide such as ITO (indium tin oxide), IZO (indium zinc oxide), ZnO (zinc oxide) , ITZO (indium tin zinc oxide), Mo, Ti, and the like.

The second electrode EL2 may be formed of Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF / Ca, LiF / Al, Mo, Ti, or a compound or mixture thereof (for example, a mixture of Ag and Mg). Or a transparent conductive film formed of a reflective film or a semi-transmissive film formed of the above material and indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide Lt; / RTI >

On the second electrode EL2, a sealing layer SL covering the second electrode EL2 is provided. The sealing layer SL may comprise at least one layer of an organic layer and an inorganic layer. The sealing layer SL protects the organic light emitting element OEL.

A display device according to an embodiment of the present invention includes an electron transporting region including a compound represented by Formula 1. A display device according to an embodiment of the present invention includes a light emitting layer including a compound represented by Formula 2. Accordingly, the organic light emitting device can reduce the band gap between the energy band of the hole transporting region and the energy band of the light emitting layer, and can easily inject holes into the light emitting layer. The band gap between the energy band of the light emitting layer and the energy band of the electron transporting region can be reduced and the injection of electrons into the light emitting layer can be facilitated. Accordingly, the organic light emitting diode according to one embodiment of the present invention can achieve high efficiency and long life.

Hereinafter, the present invention will be described more specifically by way of specific examples. The following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited thereto.

Example

Example 1

On the glass substrate, 500 Å thick eNode was formed with indium tin oxide (ITO). 2-TNATA as a hole injection layer (600 ANGSTROM), NPB as a hole transport layer (300 ANGSTROM) and Compound (H-1) as a host in a light emitting layer (400 ANGSTROM) The dopant was vacuum deposited with the host at 4% by weight. The following compound 1 was deposited on the electron transport layer (300 ANGSTROM), and LiF was deposited on the electron injecting layer (10 ANGSTROM).

Examples 2 to 10

The host and the electron transport layer were formed from the compounds shown in Table 1 below.

Host Electron transport layer Example 1 Compound H-1 Compound 1 Example 2 Compound H-6 Compound 3 Example 3 Compound H-2 Compound 3 Example 4 Compound H-5 Compound 7 Example 5 Compound H-3 Compound 8 Example 6 Compound H-5 Compound 10 Example 7 Compound H-2 Compound 11 Example 8 Compound H-4 Compound 11 Example 9 Compound H-6 Compound 11 Example 10 Compound H-7 Compound 11

Comparative Example 1

The procedure of Example 1 was repeated, except that Bis (2-methyl-8-quinolinato) (p-phenylphenolato) aluminum (III) (BAlq) was used as a host and Alq3 was deposited as an electron transport layer.

Experiment result

The current efficiency and lifetime of Examples 1 to 10 and Comparative Examples were measured. The current efficiency was measured at a current density of 10 mA / cm < ² >

Efficiency (cd / A) T90 (hr) Example 1 54 71 Example 2 57 70 Example 3 61 68 Example 4 58 77 Example 5 67 73 Example 6 53 69 Example 7 69 76 Example 8 66 81 Example 9 58 68 Example 10 63 73 Comparative Example 1 42 47

Referring to Table 2, it was confirmed that the organic light emitting devices of Examples 1 to 10 had higher efficiency and longer life than the organic light emitting devices of Comparative Example 1. [

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative and non-restrictive in every respect.

OEL: organic EL device EL1: first electrode
HTR: hole transport region EML: light emitting layer
ETR: Electron transporting region EL2: Second electrode
10: Display device

Claims (18)

A first electrode;
A hole transporting region provided on the first electrode;
A light emitting layer provided on the hole transporting region;
An electron transporting region provided on the light emitting layer; And
And a second electrode provided on the electron transporting region,
Wherein the electron transport region comprises a compound represented by the following Formula 1:
[Chemical Formula 1]

In Formula 1,
X ₁ and X ₂ are each independently CR ₅ or N,
R ₁ to R ₅ each independently represent hydrogen, deuterium, an alkyl group having 1 to 40 carbon atoms, an aryl group having 6 to 40 carbon atoms, a heteroaryl group having 1 to 40 carbon atoms, an aryloxy group having 6 to 40 carbon atoms, An aryloxy group having 6 to 40 carbon atoms, a diarylamino group having 12 to 40 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms, a cycloalkyl group having 3 to 40 carbon atoms, and a heterocycloalkyl group having 3 to 40 carbon atoms. A fused aliphatic ring, a condensed aromatic ring, a group forming a condensed heteroaliphatic ring or a condensed heteroaromatic ring, a halogen group or a combination thereof,
L is a single bond, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted condensed aryl group having 10 to 30 carbon atoms, a substituted or unsubstituted C1 to C30 heteroatom containing N, S, O An aryl group and a substituted or unsubstituted condensed heteroarylene group containing N, S, O of 1 to 30 carbon atoms, and Het is selected from the group consisting of substituted or unsubstituted heteroaryl containing 3 to 20 carbon atoms Lt; / RTI &
A ₁ and Ar ₂ are each independently hydrogen, a substituted or unsubstituted aryl group having 6 to 40 carbon atoms, or a substituted or unsubstituted heteroaryl group having 1 to 40 carbon atoms. The method according to claim 1,
The electron transport region
And at least one of compounds represented by the following Group 1:
[Compound group 1]

The method according to claim 1,
The light-
1. An organic electroluminescent device comprising a compound represented by the following formula (2): < EMI ID =
(2)

In Formula 2,
AA represents a cycloalkyl group having 3 to 60 carbon atoms, a 5- to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, An alkenyl group having 2 to 60 carbon atoms, an alkynyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, or a heteroaryl group having 1 to 60 carbon atoms,
X and a Y to form a condensed aliphatic ring, a condensed aromatic ring, a condensed heteroaliphatic ring or a condensed heteroaromatic ring,
X is selected from N (Ar < ₃ >), O and S,
Y is selected from N (Ar ₄ ), O and S, Ar ₃ and Ar ₄ are independently selected from an alkyl group having 1 to 60 carbon atoms, a cycloalkyl group having 3 to 60 carbon atoms, N, O, S, Si and P A cycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms, an alkynyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, or a 5 to 6 membered heterocycloalkyl group And a heteroaryl group having 1 to 60 carbon atoms,
Z ₁ to Z ₈ are each independently selected from C (Ar ₅ ) and N, Ar ₅ included in each of Z ₁ to Z ₈ may be different from each other, and adjacent Ar ₅ may bond to each other to form a ring ,
Ar ₅ in each of Z ₁ to Z ₈ independently represents hydrogen, an alkyl group having 1 to 60 carbon atoms, a halogen group, a cyano group, a cycloalkyl group having 3 to 60 carbon atoms, a group selected from N, O, S, Si and P , A bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms, an alkynyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms , An alkoxy group having 1 to 60 carbon atoms, an aryloxy group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, an arylthio group having 6 to 60 carbon atoms, an alkylthio group having 1 to 60 carbon atoms, A monoarylamino group, a monoarylamino group having 6 to 30 carbon atoms, a trialkylsilyl group having 3 to 90 carbon atoms, a dialkylarylsilyl group having 7 to 60 carbon atoms, a triarylsilyl group having 18 to 90 carbon atoms, Mono or See aryl group, a mono- or di-C 1 -C 120 alkyl group See, are selected from group and a hydroxyl group, nitro,
However, X is N (Ar _3), and Y is N (Ar _4), the Ar ₃ and Ar ₄ have a same and, Z ₁ to Z ₈ are both C (Ar _5), Z ₁ to Z ₈ each Except that the Ar ₅ included are the same. The method of claim 3,
Ar ₃ to Ar ₅ each independently represent a hydrogen atom,
An alkyl group, an alkyl group, a cycloalkyl group, a heterocycloalkyl group, a bicycloalkyl group, an adamantyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an aryloxy group, a heteroaryl group, , A trialkylsilyl group, a dialkylarylsilyl group, a triarylsilyl group, an arylboranyl group or an alkylboranyl group is an alkyl group having 1 to 60 carbon atoms, a halogen group, a cyano group, a cycloalkyl group having 3 to 60 carbon atoms, A 5- to 6-membered heterocycloalkyl group containing at least one member selected from S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms, an alkynyl group having 2 to 60 carbon atoms , An aryl group having 6 to 60 carbon atoms, an alkoxy group having 1 to 60 carbon atoms, an aryloxy group having 6 to 60 carbon atoms, P (= O) RaRb wherein Ra and Rb independently represent an alkyl group having 1 to 60 carbon atoms, 60 aryl group] An aryl group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms substituted with an aryl group having 6 to 60 carbon atoms, a cycloalkyl group having 1 to 60 carbon atoms substituted with an alkyl group having 1 to 60 carbon atoms An arylthio group having 6 to 60 carbon atoms, an alkylthio group having 1 to 60 carbon atoms, a mono or dialkylamino group having 1 to 30 carbon atoms, a mono or diaryl group having 6 to 60 carbon atoms, an aralkyl group having 6 to 60 carbon atoms, A trialkylsilyl group having 7 to 60 carbon atoms, a triarylsilyl group having 18 to 90 carbon atoms, a mono- or diarylboranyl group having 6 to 60 carbon atoms, a substituted or unsubstituted arylalkyl group having 1 to 120 carbon atoms Wherein said organic group is further substituted with at least one substituent selected from the group consisting of a mono or dialkylboranyl group, a nitro group and a hydroxy group. 5. The method of claim 4,
The light-
And at least one compound represented by the following formula 2:
[Compound 2]

The method according to claim 1,
The light-
And at least one of compounds represented by the following group of compounds 3:
[Compound group 3]

The method of claim 3,
The light-
And an arylamine-based compound. 8. The method of claim 7,
Wherein the arylamine-based compound comprises at least one of compounds represented by the following Group 4:
[Compound group 4]

The method according to claim 1,
The light-
And emits green light. A plurality of pixels,
At least one of the pixels
A hole transporting region provided on the first electrode;
A light emitting layer provided on the hole transporting region;
An electron transporting region provided on the light emitting layer; And
And a second electrode provided on the electron transporting region,
Wherein the electron transport region comprises a compound represented by the following Formula 1:
[Chemical Formula 1]

In Formula 1,
X ₁ and X ₂ are each independently CR ₅ or N,
R ₁ to R ₅ each independently represent hydrogen, deuterium, an alkyl group having 1 to 40 carbon atoms, an aryl group having 6 to 40 carbon atoms, a heteroaryl group having 1 to 40 carbon atoms, an aryloxy group having 6 to 40 carbon atoms, An aryloxy group having 6 to 40 carbon atoms, a diarylamino group having 12 to 40 carbon atoms, an arylalkyl group having 7 to 40 carbon atoms, a cycloalkyl group having 3 to 40 carbon atoms, and a heterocycloalkyl group having 3 to 40 carbon atoms. A fused aliphatic ring, a condensed aromatic ring, a group forming a condensed heteroaliphatic ring or a condensed heteroaromatic ring, a halogen group or a combination thereof,
L is a single bond, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted condensed aryl group having 10 to 30 carbon atoms, a substituted or unsubstituted C1 to C30 heteroatom containing N, S, O An aryl group and a substituted or unsubstituted condensed heteroarylene group containing N, S, O of 1 to 30 carbon atoms,
Het is a substituted or unsubstituted heteroaryl group containing 3 to 20 carbon atoms,
A ₁ and Ar ₂ are each independently hydrogen, a substituted or unsubstituted aryl group having 6 to 40 carbon atoms or a substituted or unsubstituted heteroaryl group having 1 to 40 carbon atoms. 11. The method of claim 10,
The electron transport region
And at least one of the compounds represented by the following compound group 1:
[Compound group 1]

11. The method of claim 10,
The light-
A display device comprising a compound represented by the following formula (2):
(2)

In Formula 2,
AA represents a cycloalkyl group having 3 to 60 carbon atoms, a 5- to 6-membered heterocycloalkyl group containing at least one member selected from N, O, S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, An alkenyl group having 2 to 60 carbon atoms, an alkynyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, or a heteroaryl group having 1 to 60 carbon atoms,
X and a Y to form a condensed aliphatic ring, a condensed aromatic ring, a condensed heteroaliphatic ring or a condensed heteroaromatic ring,
X is selected from N (Ar < ₃ >), O and S,
Y is selected from N (Ar ₄ ), O and S, Ar ₃ and Ar ₄ are independently selected from an alkyl group having 1 to 60 carbon atoms, a cycloalkyl group having 3 to 60 carbon atoms, N, O, S, Si and P A cycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms, an alkynyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms, or a 5 to 6 membered heterocycloalkyl group And a heteroaryl group having 1 to 60 carbon atoms,
Z ₁ to Z ₈ are each independently selected from C (Ar ₅ ) and N, Ar ₅ included in each of Z ₁ to Z ₈ may be different from each other, and adjacent Ar ₅ may bond to each other to form a ring ,
Ar ₅ in each of Z ₁ to Z ₈ independently represents hydrogen, an alkyl group having 1 to 60 carbon atoms, a halogen group, a cyano group, a cycloalkyl group having 3 to 60 carbon atoms, a group selected from N, O, S, Si and P , A bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms, an alkynyl group having 2 to 60 carbon atoms, an aryl group having 6 to 60 carbon atoms , An alkoxy group having 1 to 60 carbon atoms, an aryloxy group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, an arylthio group having 6 to 60 carbon atoms, an alkylthio group having 1 to 60 carbon atoms, A monoarylamino group, a monoarylamino group having 6 to 30 carbon atoms, a trialkylsilyl group having 3 to 90 carbon atoms, a dialkylarylsilyl group having 7 to 60 carbon atoms, a triarylsilyl group having 18 to 90 carbon atoms, Mono or See aryl group, a mono- or di-C 1 -C 120 alkyl group See, are selected from group and a hydroxyl group, nitro,
However, X is N (Ar _3), and Y is N (Ar _4), the Ar ₃ and Ar ₄ have a same and, Z ₁ to Z ₈ are both C (Ar _5), Z ₁ to Z ₈ each Except that the Ar ₅ included are the same. 13. The method of claim 12,
Ar ₃ to Ar ₅ each independently represent a hydrogen atom,
An alkyl group, an alkyl group, a cycloalkyl group, a heterocycloalkyl group, a bicycloalkyl group, an adamantyl group, an alkenyl group, an alkynyl group, an aryl group, an alkoxy group, an aryloxy group, a heteroaryl group, , A trialkylsilyl group, a dialkylarylsilyl group, a triarylsilyl group, an arylboranyl group or an alkylboranyl group is an alkyl group having 1 to 60 carbon atoms, a halogen group, a cyano group, a cycloalkyl group having 3 to 60 carbon atoms, A 5- to 6-membered heterocycloalkyl group containing at least one member selected from S, Si and P, a bicycloalkyl group having 7 to 60 carbon atoms, an adamantyl group, an alkenyl group having 2 to 60 carbon atoms, an alkynyl group having 2 to 60 carbon atoms , An aryl group having 6 to 60 carbon atoms, an alkoxy group having 1 to 60 carbon atoms, an aryloxy group having 6 to 60 carbon atoms, P (= O) RaRb wherein Ra and Rb independently represent an alkyl group having 1 to 60 carbon atoms, 60 aryl group] An aryl group having 6 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms, a heteroaryl group having 1 to 60 carbon atoms substituted with an aryl group having 6 to 60 carbon atoms, a cycloalkyl group having 1 to 60 carbon atoms substituted with an alkyl group having 1 to 60 carbon atoms An arylthio group having 6 to 60 carbon atoms, an alkylthio group having 1 to 60 carbon atoms, a mono or dialkylamino group having 1 to 30 carbon atoms, a mono or diaryl group having 6 to 60 carbon atoms, an aralkyl group having 6 to 60 carbon atoms, A trialkylsilyl group having 7 to 60 carbon atoms, a triarylsilyl group having 18 to 90 carbon atoms, a mono- or diarylboranyl group having 6 to 60 carbon atoms, a substituted or unsubstituted arylalkyl group having 1 to 120 carbon atoms Wherein said substituent is further substituted with at least one substituent selected from the group consisting of a mono or dialkylboranyl group, a nitro group and a hydroxy group. 13. The method of claim 12,
The light-
And at least one of the compounds represented by the following compound group 2:
[Compound 2]

11. The method of claim 10,
The light-
And at least one of the compounds represented by the following group of compounds 3:
[Compound group 3]

13. The method of claim 12,
The light-
And an arylamine-based compound. 17. The method of claim 16,
Wherein the arylamine-based compound comprises at least one of the compounds represented by the following compound group 4:
[Compound group 4]

11. The method of claim 10,
The light-
And emits green light.

Images