CN112005393A - Organic light emitting device - Google Patents

Abstract

This specification relates to an organic light-emitting device, comprising: a first electrode, a second electrode disposed opposite to the first electrode, and a first organic layer and a second organic layer disposed between the first electrode and the second electrode, wherein the first organic layer comprises a compound represented by chemical formula 1, and the second organic layer comprises a compound represented by chemical formula 3.

Description

Organic Light Emitting Devices

technical field

This application claims priority to Korean Patent Application No. 10-2018-0104682 filed with the Korean Patent Office on September 3, 2018, the entire contents of which are incorporated herein.

This specification relates to organic light-emitting devices.

Background technique

In general, the organic light-emitting phenomenon refers to the phenomenon of using organic substances to convert electrical energy into light energy. An organic light-emitting device utilizing an organic light-emitting phenomenon generally has a structure including an anode and a cathode and an organic layer interposed therebetween. Here, in order to improve the efficiency and stability of the organic light-emitting device, the organic layer is usually formed of a multilayer structure composed of different substances. A transport layer, an electron injection layer, and the like are formed. For the structure of such an organic light-emitting device, if a voltage is applied between two electrodes, holes are injected from the anode to the organic layer, and electrons are injected from the cathode to the organic layer. excitons, and emit light when the excitons re-transition to the ground state.

Conventionally, aromatic diamine derivatives or aromatic condensed ring diamine derivatives have been known as hole transport materials used in organic EL devices. However, in this case, since the voltage applied is mostly high, problems such as shortening the life of the device and increasing power consumption arise. As a solution to the above-mentioned problems, a method of doping an electron-accepting compound such as a Lewis acid in a hole injection layer of an organic EL device or using it alone has been proposed. However, the above-mentioned methods show limitations in the injection and transport of holes, therefore, it is desired to use a combination of substances between the hole transport layer or the hole regulation layer or the hole regulation of the hole transport layer and the plurality of layers The material of the layer elicits the effect of low voltage and high efficiency, long life. A typical hole transport layer is an aromatic-substituted tertiary amine, and the device properties found in combinations of these materials show various results. Therefore, there is a continuing need to develop new materials for improving the characteristics of devices due to hole transport and carrier modulation.

SUMMARY OF THE INVENTION

technical issues

This specification provides organic light-emitting devices.

Solution to the problem

The present specification provides an organic light-emitting device comprising: a first electrode, a second electrode provided opposite to the first electrode, and a first organic layer provided between the first electrode and the second electrode and the second organic layer,

The above-mentioned first organic substance layer contains a compound represented by the following Chemical Formula 1,

The above-mentioned second organic substance layer contains a compound represented by the following Chemical Formula 3.

[Chemical formula 1]

In Chemical Formula 1,

X is O or S,

R1 to R4 are the same or different from each other and are each independently hydrogen, deuterium, halogen group, cyano, nitro, substituted or unsubstituted alkyl, substituted or unsubstituted haloalkyl, substituted or unsubstituted haloalkoxy , substituted or unsubstituted cycloalkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclyl, or adjacent groups combined with each other to form substituted or unsubstituted the ring,

At least one of R1 to R4 is represented by the following chemical formula 2A or 2B,

n1 to n4 are each independently an integer of 1 to 4,

[Chemical formula 2A]

[Chemical formula 2B]

In Chemical Formulas 2A and 2B,

At least one of A1 to A3 is N, the rest are CH, or combined with adjacent groups in L1, L2, L3, Ar4 and Ar5 to form a substituted or unsubstituted ring,

L1 to L3 are the same as or different from each other, and each independently is a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted divalent heterocyclic group, or a group adjacent to A1 to A3 combine to form substituted or unsubstituted rings,

Ar4 and Ar5 are the same or different from each other, and are each independently hydrogen, deuterium, substituted or unsubstituted aryl group, or substituted or unsubstituted heterocyclic group, or combined with adjacent groups in A1 to A3 to form a substitution or unsubstituted rings,

Ar6 is hydrogen, deuterium, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclic group, a is an integer from 0 to 5,

[Chemical formula 3]

In Chemical Formula 3,

Ar1 and Ar2 are each a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group,

Ar3 is a substituted or unsubstituted 2- to 4-valent alkyl group, a substituted or unsubstituted 2- to 4-valent aryl group, or a substituted or unsubstituted 2- to 4-valent cycloalkyl group,

At least one of X1 to X3 is N, the rest are CH,

L is a direct bond, or a substituted or unsubstituted arylene group,

n5 is an integer from 2 to 4,

In the above Chemical Formulas 1 to 3, when the above a and n1 to n5 are each independently 2 or more, the substituents in the parentheses are the same or different from each other.

Invention effect

An organic light emitting device using the compound according to an embodiment of the present specification in a hole blocking layer, an electron regulation layer, an electron transport layer, or an electron injection and transport layer, respectively, can achieve low driving voltage, high luminous efficiency or long lifetime.

Description of drawings

1, 3 and 4 illustrate an example of an organic light-emitting device in which a substrate 1, an anode 2, a light-emitting layer 3, and a cathode 4 are stacked in this order.

2 illustrates an example of an organic light emitting device in which a substrate 1 , an anode 2 , a hole transport layer 5 , a light emitting layer 3 , a hole blocking layer or electron regulation layer 6 , an electron injection and transport layer 7 , and a cathode 4 are stacked in this order.

[Symbol Description]

1: Substrate

2: Anode

3: Light-emitting layer

4: Cathode

5: Hole transport layer

6: hole blocking layer or electron regulating layer

7: Electron injection and transport layers

Detailed ways

Hereinafter, the present specification will be described in more detail.

In this specification, when a certain member is referred to as being "on" another member, it includes not only the case where the certain member is in contact with the other member, but also the case where other members exist between the two members.

In the present specification, when it is indicated that a certain part "includes/includes" a certain constituent element, unless there is no special description to the contrary, it means that other constituent elements may be further included, rather than excluding other constituent elements.

The present specification provides an organic light-emitting device comprising: a first electrode, a second electrode provided opposite to the first electrode, and a first organic layer provided between the first electrode and the second electrode and a second organic layer, wherein the first organic layer contains the compound represented by the above Chemical Formula 1, and the second organic layer contains the compound represented by the above Chemical Formula 3.

According to an embodiment of the present specification, the compound represented by the above-mentioned Chemical Formula 1 has the above-mentioned core structure, thereby having the advantage of being able to adjust the triplet energy and exhibiting the characteristics of long life and high efficiency.

In addition, an organic light-emitting device including the compound represented by the above-mentioned Chemical Formula 1 in the first organic substance layer of the organic light-emitting device and including the compound represented by the above-mentioned Chemical Formula 3 as the second organic substance layer of the organic light-emitting device has an energy relationship of the following formula 1 .

[Formula 1]

E _Et >E _Ec

In the above formula 1, E _Et is the electron affinity (Electron Affinity (eV)) of the compound represented by the above chemical formula 3 contained in the above-mentioned second organic layer, and E _Ec is contained in the above-mentioned first organic layer. Electron affinity (eV) of the compound represented by the above Chemical Formula 1.

The compound represented by the above Chemical Formula 1 and the compound represented by the above Chemical Formula 3 exhibit the energy relationship as described above, and therefore the first organic layer containing the compound represented by the above Chemical Formula 1 is appropriately controlled from containing the compound represented by the above Chemical Formula 3. The amount of electrons transferred from the second organic layer can improve the efficiency and lifespan of the organic light-emitting device.

In the present specification, examples of substituents are described below, but are not limited thereto.

The above term "substituted" means that the hydrogen atom bonded to the carbon atom of the compound is replaced with another substituent, and the position to be substituted is a position where a hydrogen atom can be substituted, that is, a position where a substituent can be substituted. Without limitation, when two or more substituents are substituted, the two or more substituents may be the same or different from each other.

In this specification, the term "substituted or unsubstituted" refers to a group selected from the group consisting of hydrogen, halogen group, nitrile group, nitro group, hydroxyl group, substituted or unsubstituted alkyl group, substituted or unsubstituted cycloalkyl group , substituted or unsubstituted alkoxy, substituted or unsubstituted alkenyl, substituted or unsubstituted amine, substituted or unsubstituted aryl, and 1 or 2 of substituted or unsubstituted heterocyclic groups The above-mentioned substituents are substituted, or are substituted with a substituent in which two or more of the above-exemplified substituents are connected, or have no substituents. For example, "a substituent in which two or more substituents are connected" may be a biphenyl group. That is, the biphenyl group may be an aryl group, and may be interpreted as a substituent in which two phenyl groups are connected.

In the present specification, as examples of the halogen group, there are fluorine, chlorine, bromine or iodine.

In this specification, the above-mentioned alkyl group may be linear or branched, and the number of carbon atoms is not particularly limited, but preferably 1 to 60. Specific examples include methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methyl-butyl, 1 -Ethyl-butyl, pentyl, n-pentyl, isopentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl- 2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl, n-heptyl, 1-methylhexyl, cyclopentylmethyl, cyclohexylmethyl, octyl, n-hexyl Octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2-dimethylheptyl, 1-ethyl-propyl, 1 , 1-dimethyl-propyl, isohexyl, 2-methylpentyl, 4-methylhexyl, 5-methylhexyl, etc., but not limited thereto.

In this specification, the cycloalkyl group is not particularly limited, but is preferably a cycloalkyl group having 3 to 60 carbon atoms, and specifically, there are cyclopropyl, cyclobutyl, cyclopentyl, and 3-methylcyclopentyl , 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl, 3,4,5-trimethylcyclohexyl , 4-tert-butylcyclohexyl, cycloheptyl, cyclooctyl, etc., but not limited thereto.

In the present specification, the above-mentioned alkoxy group may be linear, branched or cyclic. The number of carbon atoms of the alkoxy group is not particularly limited, but preferably 1 to 20 carbon atoms. Specifically, it can be methoxy, ethoxy, n-propoxy, isopropoxy, isopropyloxy, n-butoxy, isobutoxy, tert-butoxy, sec-butoxy, n-pentyloxy, neopentyloxy, isopentyloxy, n-hexyloxy, 3,3-dimethylbutoxy, 2-ethylbutoxy, n-octyloxy, n-nonyloxy, n-decyl oxy, benzyloxy, p-methylbenzyloxy, etc., but not limited to these.

In the present specification, the above-mentioned alkenyl group may be linear or branched, and the number of carbon atoms is not particularly limited, but preferably 2 to 40. Specific examples include vinyl, 1-propenyl, isopropenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl Alkenyl, 3-methyl-1-butenyl, 1,3-butadienyl, allyl, 1-phenylethen-1-yl, 2-phenylethen-1-yl, 2,2 -Diphenylethen-1-yl, 2-phenyl-2-(naphthalen-1-yl)ethen-1-yl, 2,2-bis(diphenyl-1-yl)ethen-1-yl, stilbene group, styryl group, etc., but not limited to this.

In this specification, the amine group can be selected from _-NH2 , alkylamine, N-alkylarylamine, arylamine, N-arylheteroarylamine, N-alkylheteroaryl The number of carbon atoms in the amino group and the heteroarylamine group is not particularly limited, but preferably 1 to 30. Specific examples of the amino group include a methylamino group, a dimethylamino group, an ethylamino group, a diethylamino group, a phenylamino group, a naphthylamino group, a biphenylamino group, and an anthracenylamino group. , 9-methyl-anthracenylamino, diphenylamino, xylylamino, N-phenyltolylamino, triphenylamino, N-phenylbiphenylamino, N- Phenylnaphthylamino, N-biphenylnaphthylamino, N-naphthylfluorenylamino, N-phenylphenanthrenylamino, N-biphenylphenanthrenylamino, N-phenylfluorene amino group, N-phenylterphenylamino group, N-phenanthrenylfluorenylamino group, N-biphenylfluorenylamino group, etc., but not limited thereto.

In the present specification, when the above-mentioned aryl group is a monocyclic aryl group, the number of carbon atoms is not particularly limited, but preferably 6 to 25 carbon atoms. Specifically, as the monocyclic aryl group, a phenyl group, a biphenyl group, a terphenyl group, etc. may be used, but it is not limited thereto

基、芴基等，但并不限定于此。When the above-mentioned aryl group is a polycyclic aryl group, the number of carbon atoms is not particularly limited, but preferably 10 to 60 carbon atoms. Specifically, as the polycyclic aryl group, a naphthyl group, an anthracenyl group, a phenanthryl group, a pyrenyl group, a perylene group, a

group, fluorene group, etc., but not limited to this.

In the present specification, the above-mentioned fluorenyl group may be substituted, and adjacent substituent groups may be bonded to each other to form a ring.

等，但并不限定于此。When the above-mentioned fluorenyl group is substituted, it can be

etc., but not limited to this.

唑基、

二唑基、吡啶基、联吡啶基、嘧啶基、三嗪基、三唑基、吖啶基、哒嗪基、吡嗪基、喹啉基、喹唑啉基、喹喔啉基、酞嗪基、吡啶并嘧啶基、吡啶并吡嗪基、吡嗪并吡嗪基、异喹啉基、吲哚基、咔唑基、苯并

唑基、苯并咪唑基、苯并噻唑基、苯并咔唑基、苯并噻吩基、二苯并噻吩基、苯并呋喃基、菲啶基(phenanthridine)、菲咯啉基(phenanthroline)、异

唑基、噻二唑基、二苯并呋喃基、二苯并噻咯基、吩噻

基(phenoxathiine)、吩

嗪基(phenoxazine)、吩噻嗪基(phenothiazine)、二氢茚并咔唑基、螺芴呫吨基和螺芴噻吨基等，但并不限定于此。在本说明书中，在相邻的基团彼此结合而形成的取代或未取代的环中，“环”是指取代或未取代的烃环、或者取代或未取代的杂环。In the present specification, the heterocyclic group contains one or more non-carbon atoms, that is, a heteroatom, and specifically, the heteroatom may contain one or more atoms selected from O, N, Se, S, and the like. The number of carbon atoms of the heterocyclic group is not particularly limited, but preferably 2 to 60 carbon atoms. As examples of heterocyclic groups, there are thienyl, furyl, pyrrolyl, imidazolyl, thiazolyl,

azolyl,

oxadiazolyl, pyridyl, bipyridyl, pyrimidinyl, triazinyl, triazolyl, acridine, pyridazinyl, pyrazinyl, quinolinyl, quinazolinyl, quinoxalinyl, phthalazine base, pyridopyrimidinyl, pyridopyrazinyl, pyrazinopyrazinyl, isoquinolinyl, indolyl, carbazolyl, benzoyl

azolyl, benzimidazolyl, benzothiazolyl, benzocarbazolyl, benzothienyl, dibenzothienyl, benzofuranyl, phenanthridine, phenanthroline, different

azolyl, thiadiazolyl, dibenzofuranyl, dibenzothirolyl, phenothia

base (phenoxathiine), pheno

phenoxazine, phenothiazine, dihydroindenocarbazolyl, spirofluorenyl xanthyl, spirofluorenyl thioxanthyl and the like, but are not limited thereto. In the present specification, in a substituted or unsubstituted ring formed by bonding adjacent groups to each other, "ring" means a substituted or unsubstituted hydrocarbon ring, or a substituted or unsubstituted heterocyclic ring.

In the present specification, the hydrocarbon ring may be an aromatic hydrocarbon, an aliphatic hydrocarbon, or a condensed ring of an aromatic hydrocarbon and an aliphatic hydrocarbon, and may be selected from the examples of the above-mentioned cycloalkyl group or aryl group except that it is not the above-mentioned monovalent group.

In the present specification, the aromatic hydrocarbon ring may be a monocyclic ring or a polycyclic ring, and may be selected from the examples of the above-mentioned aryl group except that it is not monovalent.

In the present specification, the heterocycle contains one or more non-carbon atoms, that is, a heteroatom, and specifically, the above-mentioned heteroatom may contain one or more atoms selected from O, N, Se, S, and the like. The above-mentioned heterocyclic ring may be monocyclic or polycyclic, aromatic, aliphatic, or a condensed ring of aromatic and aliphatic, and may be selected from the examples of the above-mentioned heterocyclic group except that it is not monovalent.

In the present specification, an arylene group refers to a group having two bonding positions in an aryl group, that is, a divalent group. Except that they are each a divalent group, the above-mentioned description of the aryl group can be applied.

In the present specification, a divalent heterocyclic group refers to a group having two bonding positions in the heterocyclic group, that is, a divalent group. Except that they are each a divalent group, the description of the above-mentioned heterocyclic group can be applied.

In the present specification, a 2- to 4-valent alkyl group refers to a group having two to four bonding positions in the alkyl group, that is, a 2- to 4-valent group. Except that they are each a 2- to 4-valent group, the above description of the alkyl group can be applied.

In the present specification, a 2- to 4-valent aryl group refers to a group having two to four bonding positions in the aryl group, that is, a 2- to 4-valent group. Except that they are each a 2- to 4-valent group, the above description of the aryl group can be applied.

In the present specification, a 2- to 4-valent cycloalkyl group refers to a group having two to four bonding positions in the cycloalkyl group, that is, a 2- to 4-valent group. Except that they are each a 2- to 4-valent group, the above description of the cycloalkyl group can be applied.

According to one embodiment of the present specification, the above-mentioned R1 to R4 are the same or different from each other, and are each independently hydrogen, deuterium, halogen group, cyano, nitro, substituted or unsubstituted alkyl, substituted or unsubstituted haloalkyl , substituted or unsubstituted haloalkoxy, substituted or unsubstituted cycloalkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclyl, or adjacent groups The groups combine with each other to form substituted or unsubstituted rings.

According to an embodiment of the present specification, the above R1 to R4 are the same or different from each other, and each independently is hydrogen, deuterium, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclyl.

According to one embodiment of the present specification, the above-mentioned R1 to R4 are the same or different from each other, and are each independently hydrogen, deuterium, substituted or unsubstituted aryl group, or substituted or unsubstituted heterocyclic group.

According to one embodiment of the present specification, the above-mentioned R1 to R4 are the same or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted aryl group with 6 to 60 carbon atoms, or a substituted or unsubstituted carbon number with 2 to 60 heterocyclyl.

According to an embodiment of the present specification, the above R1 to R4 are the same or different from each other, and each independently is hydrogen, deuterium, a substituted or unsubstituted aryl group with 6 to 30 carbon atoms, or a substituted or unsubstituted carbon number with 2 to 30 heterocyclyl.

According to one embodiment of the present specification, the above-mentioned R1 to R4 are the same or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted aryl group with 6 to 15 carbon atoms, or a substituted or unsubstituted carbon number with 2 to 15 heterocyclyl.

According to an embodiment of the present specification, a group other than the following chemical formula 2A or 2B among the above R1 to R4 is hydrogen or deuterium.

According to an embodiment of the present specification, at least one of the above R1 to R4 groups other than the following chemical formula 2A or 2B is an alkyl group, an aryl group, or an aryl group substituted by an alkyl group, and the rest are hydrogen or deuterium.

According to an embodiment of the present specification, at least one of the groups in the above R1 to R4 that is not the following chemical formula A or 2B is methyl; n-butyl; tert-butyl; substituted by methyl, or tert-butyl or Unsubstituted phenyl; naphthyl; or fluorenyl substituted with methyl, the remainder being hydrogen or deuterium.

According to one embodiment of the present specification, the n1 is 2, and the adjacent R1s are bonded to each other to form a substituted or unsubstituted ring.

According to one embodiment of the present specification, the n1 is 2, and the adjacent R1s are bonded to each other to form a substituted or unsubstituted hydrocarbon ring.

According to one embodiment of the present specification, the n1 is 2, and the adjacent R1s are bonded to each other to form a substituted or unsubstituted aromatic hydrocarbon ring.

According to one embodiment of the present specification, the n1 is 2, and the adjacent R1s are bonded to each other to form a substituted or unsubstituted benzene ring.

According to one embodiment of the present specification, the n1 is 2, and the adjacent R1s are bonded to each other to form a benzene ring.

According to one embodiment of the present specification, the n2 is 2, and the adjacent R2s are bonded to each other to form a substituted or unsubstituted ring.

According to one embodiment of the present specification, the n2 is 2, and the adjacent R2s are bonded to each other to form a substituted or unsubstituted hydrocarbon ring.

According to one embodiment of the present specification, the n2 is 2, and the adjacent R2s are bonded to each other to form a substituted or unsubstituted aromatic hydrocarbon ring.

According to one embodiment of the present specification, the n2 is 2, and the adjacent R2s are bonded to each other to form a substituted or unsubstituted benzene ring.

According to one embodiment of the present specification, the n2 is 2, and the adjacent R2s are bonded to each other to form a benzene ring.

According to an embodiment of the present specification, the n1 is 2, the adjacent R1s are bonded to each other to form a substituted or unsubstituted ring, the n2 is 2, and the adjacent R2s are bonded to each other to form a benzene ring.

According to an embodiment of the present specification, at least one of the above-mentioned R1 to R4 is represented by the following chemical formula 2A or 2B.

[Chemical formula 2A]

[Chemical formula 2B]

In Chemical Formulas 2A and 2B, the definitions of L1 to L3, Ar4 to Ar6, A1 to A3 and a are the same as those described above.

According to an embodiment of the present specification, one of the above-mentioned R1 to R4 is represented by the above-mentioned Chemical Formula 2A or 2B.

According to an embodiment of the present specification, two of the above-mentioned R1 to R4 are represented by the above-mentioned chemical formula 2A or 2B.

According to an embodiment of the present specification, one of the above-mentioned R2 and one of the above-mentioned R3 is represented by the above-mentioned Chemical Formula 2A or 2B.

According to an embodiment of the present specification, at least one of the above A1 to A3 is N, and the rest are CH, or combined with adjacent groups in the above L1, L2, L3, Ar4 and Ar5 to form substituted or unsubstituted ring.

According to one embodiment of the present specification, the above-mentioned L1 to L3 are the same as or different from each other, and each independently is a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heterocyclic group, or the same as the above-mentioned A1 to A3 Adjacent groups in it combine to form a substituted or unsubstituted ring.

According to one embodiment of the present specification, the above L1 to L3 are the same as or different from each other, and each independently is a direct bond, a substituted or unsubstituted arylene group having 6 to 60 carbon atoms, or a substituted or unsubstituted carbon atomic group. 2 to 60 heterocyclyl.

According to an embodiment of the present specification, the above L1 to L3 are the same as or different from each other, and each independently is a directly bonded, substituted or unsubstituted arylene group having 6 to 30 carbon atoms, or a substituted or unsubstituted carbon atomic group 2 to 30 heterocyclyl.

According to an embodiment of the present specification, the above L1 to L3 are the same as or different from each other, and each independently is a direct bond, a substituted or unsubstituted arylene group having 6 to 15 carbon atoms, or a substituted or unsubstituted carbon atomic group. 2 to 15 heterocyclyl.

According to one embodiment of the present specification, the above-mentioned L1 to L3 are the same as or different from each other, and each independently is a direct bond, a phenylene group, or a biphenylene group.

基、2价的吩

嗪基、2价的吩噻嗪基、2价的吡啶基、被烷基取代或未取代的2价的二氢茚并咔唑基、二苯并噻吩与苯基连接而成的2价的基团、或者咔唑与苯基连接而成的2价的基团。According to one embodiment of the present specification, the above-mentioned L3 is a direct bond, a phenylene group, a biphenylene group, a naphthylene group, a divalent thienyl group, a divalent furyl group, a divalent dibenzothienyl group, a 2 valent dibenzofuranyl, aryl or alkylaryl substituted or unsubstituted divalent carbazolyl, aryl or alkylaryl substituted or unsubstituted divalent benzocarbazolyl, Alkyl-substituted or unsubstituted bivalent dibenzothirolyl, bivalent phenothia

base, divalent phene

Azinyl, divalent phenothiazinyl, divalent pyridyl, divalent dihydroindenocarbazolyl substituted or unsubstituted by alkyl, dibenzothiophene and phenyl linked group, or a divalent group in which carbazole and a phenyl group are linked.

基、2价的吩

嗪基、2价的吩噻嗪基、2价的吡啶基、被甲基取代或未取代的2价的二氢茚并咔唑基、二苯并噻吩与苯基连接而成的2价的基团、或者咔唑与苯基连接而成的2价的基团。According to one embodiment of the present specification, the above-mentioned L3 is a direct bond, a phenylene group, a biphenylene group, a naphthylene group, a divalent thienyl group, a divalent furyl group, a divalent dibenzothienyl group, a 2 valent dibenzofuranyl, phenyl or methylphenyl substituted or unsubstituted bivalent carbazolyl, phenyl or methylphenyl substituted or unsubstituted bivalent benzocarbazolyl, Methyl-substituted or unsubstituted bivalent dibenzothirolyl, bivalent phenothia

base, divalent phene

Azinyl, divalent phenothiazinyl, divalent pyridyl, divalent dihydroindenocarbazolyl substituted or unsubstituted by methyl, dibenzothiophene and phenyl linked group, or a divalent group in which carbazole and a phenyl group are linked.

According to an embodiment of the present specification, the above-mentioned Ar4 and Ar5 are the same or different from each other, and are each independently hydrogen, deuterium, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclyl, or the same as that of A1 to A3. Adjacent groups combine to form substituted or unsubstituted rings.

According to an embodiment of the present specification, the above-mentioned Ar4 and Ar5 are the same as or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted aryl group with 6 to 60 carbon atoms, or a substituted or unsubstituted aryl group with 2 carbon atoms A heterocyclic group of 60 to 60, or a substituted or unsubstituted aromatic hydrocarbon ring having 6 to 60 carbon atoms is formed by combining with the adjacent groups in the above-mentioned A1 to A3.

According to one embodiment of the present specification, the above-mentioned Ar4 and Ar5 are the same as or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted aryl group with 6 to 30 carbon atoms, or a substituted or unsubstituted carbon number with 2 A heterocyclic group of to 30, or a substituted or unsubstituted benzene ring is formed by combining with the adjacent group in the above-mentioned A1 to A3.

According to one embodiment of the present specification, the above-mentioned Ar4 and Ar5 are the same as or different from each other, and are each independently hydrogen, deuterium, a substituted or unsubstituted aryl group with 6 to 20 carbon atoms, or a substituted or unsubstituted aryl group with 2 carbon atoms A heterocyclic group to 15, or a substituted or unsubstituted benzene ring is formed by combining with the adjacent group in the above-mentioned A1 to A3.

According to one embodiment of the present specification, the above-mentioned Ar4 and Ar5 are the same as or different from each other, and are each independently a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, or a substituted or unsubstituted heterocyclic group having 2 to 15 carbon atoms. A cyclic group, or a substituted or unsubstituted benzene ring is formed by combining with the adjacent groups in the above-mentioned A1 to A3.

According to one embodiment of the present specification, the above Ar4 and Ar5 are the same as or different from each other, and each independently is represented by CN, alkyl, alkoxy, haloalkyl, haloalkoxy, alkylsilyl, aryl, alkylaryl aryl group with 6 to 20 carbon atoms substituted or unsubstituted by a radical or a heterocyclyl group; or by CN, alkyl, alkoxy, haloalkyl, haloalkoxy, alkylsilyl, aryl or heterocyclyl A substituted or unsubstituted heterocyclic group having 2 to 15 carbon atoms, or a benzene ring is formed by combining with the adjacent groups in the above-mentioned A1 to A3.

基、吩

嗪基、吩噻嗪基、吡啶基、二氢茚并咔唑基、芳基甲硅烷基、烷基甲硅烷基、螺芴呫吨基和螺芴噻吨基中的一个或2个以上的基团连接而成的基团，它们可以被CN、烷基、烷氧基、卤代烷基、卤代烷氧基、烷基甲硅烷基、芳基、烷基芳基或杂环基取代。在这里，作为取代基，杂环基可以为咔唑基、苯并咔唑基、二苯并呋喃基、二苯并噻吩基、二苯并噻咯基、吩噻

基、吩

嗪基、吩噻嗪基、吡啶基、或二氢茚并咔唑基，作为取代基，芳基可以为苯基、联苯基、萘基、或三亚苯基。此外，上述烷基可以为甲基或叔丁基，上述烷氧基可以为甲氧基，上述卤代烷基可以为三氟甲基，上述卤代烷氧基可以为三氟甲氧基，上述烷基甲硅烷基可以为甲基甲硅烷基。According to an embodiment of the present specification, the above-mentioned Ar4 and Ar5 are the same or different from each other, and each independently is selected from the group consisting of phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, triphenylene, phenanthryl, and fluoranthenyl , Acetyl, Carbazolyl, Benzocarbazolyl, Dibenzofuranyl, Dibenzothienyl, Dibenzothirolyl, Phenothiene

base, phen

One or two or more of oxazinyl, phenothiazinyl, pyridyl, dihydroindenocarbazolyl, arylsilyl, alkylsilyl, spirofluorenyl xanthyl and spirofluorenyl thioxanthyl A group formed by connecting groups, which may be substituted by CN, alkyl, alkoxy, haloalkyl, haloalkoxy, alkylsilyl, aryl, alkylaryl or heterocyclyl. Here, as a substituent, the heterocyclic group may be carbazolyl, benzocarbazolyl, dibenzofuranyl, dibenzothienyl, dibenzothirolyl, phenothia

base, phen

oxazinyl, phenothiazinyl, pyridyl, or dihydroindenocarbazolyl, and as a substituent, the aryl group may be phenyl, biphenyl, naphthyl, or triphenylene. In addition, the above-mentioned alkyl group may be methyl group or tert-butyl group, the above-mentioned alkoxy group may be methoxy group, the above-mentioned haloalkyl group may be trifluoromethyl group, the above-mentioned haloalkoxy group may be trifluoromethoxy group, the above-mentioned alkylmethyl group may be The silyl group may be a methylsilyl group.

In one embodiment of the present specification, the above-mentioned Chemical Formula 1 is represented by any one of the following Chemical Formulas 1-1 to 1-5.

[Chemical formula 1-1]

[Chemical formula 1-2]

[Chemical formula 1-3]

[Chemical formula 1-4]

[Chemical formula 1-5]

In the above Chemical Formula 1-1 to Chemical Formula 1-5,

The definitions of X, R1 to R4, L1 to L3, A1 to A3, Ar4, Ar5 and n1 to n4 are the same as those in the above Chemical Formulas 1 and 2A, L1', L2', L3', A1', A2', A3 ', Ar4' and Ar5' are each the same as defined above for L1, L2, L3, A1, A2, A3, Ar4 and Ar5.

In one embodiment of the present specification, two of A1 to A3 in the above-mentioned Chemical Formula 2A are N.

In one embodiment of the present specification, A1 to A3 of the above Chemical Formula 2A are N.

In one embodiment of the present specification, the above-mentioned chemical formula 2A may be selected from the following structural formulae.

In the above structural formula, L1 to L3, Ar4 and Ar5 have the same definitions as above.

In one embodiment of the present specification, Ar6 in the above Chemical Formula 2B is hydrogen.

In one embodiment of the present specification, the above-mentioned Ar1 and Ar2 are the same or different from each other, and are each independently a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group.

In one embodiment of the present specification, the above-mentioned Ar1 and Ar2 are the same or different from each other, and are each independently a substituted or unsubstituted aryl group having 6 to 60 carbon atoms, or a substituted or unsubstituted aryl group having 2 to 60 carbon atoms. Heterocyclyl.

In one embodiment of the present specification, the above-mentioned Ar1 and Ar2 are the same or different from each other, and are each independently a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted aryl group having 2 to 30 carbon atoms. Heterocyclyl.

In one embodiment of the present specification, the above-mentioned Ar1 and Ar2 are the same or different from each other, and are each independently a substituted or unsubstituted aryl group having 6 to 15 carbon atoms, or a substituted or unsubstituted aryl group having 2 to 15 carbon atoms. Heterocyclyl.

In one embodiment of the present specification, the above-mentioned Ar1 and Ar2 are the same or different from each other, and are each independently a substituted or unsubstituted aryl group having 6 to 15 carbon atoms, or a substituted or unsubstituted aryl group having 2 to 15 carbon atoms. Heterocyclyl.

In one embodiment of the present specification, the above-mentioned Ar1 and Ar2 are the same or different from each other, and each independently is an aryl substituted or unsubstituted by deuterium, CN, a halogen group, an alkyl group, a haloalkyl group, an alkoxy group, or an aryl group. group; or a heterocyclic group.

In one embodiment of the present specification, the above-mentioned Ar1 and Ar2 are the same or different from each other, and each independently is a benzene substituted or unsubstituted by deuterium, CN, halogen group, alkyl group, haloalkyl group, alkoxy group, or aryl group biphenyl; naphthyl; pyridyl; or thienyl.

In one embodiment of the present specification, the above Ar1 and Ar2 are the same or different from each other, each independently substituted by deuterium, CN, F, trifluoromethyl, methyl, tert-butyl, methoxy, or phenyl, or Unsubstituted phenyl; biphenyl; naphthyl; pyridyl; or thienyl.

In one Embodiment of this specification, the said n5 is 2.

In one Embodiment of this specification, the said n5 is 2, and the substituents in the said parentheses are the same as or different from each other.

In one embodiment of the present specification, the above-mentioned Ar3 is a substituted or unsubstituted divalent aryl group, or a substituted or unsubstituted divalent cycloalkyl group.

In one embodiment of the present specification, Ar3 is a substituted or unsubstituted divalent aryl group having 6 to 60 carbon atoms, or a substituted or unsubstituted divalent cycloalkyl group having 3 to 60 carbon atoms.

In one embodiment of the present specification, Ar3 is a substituted or unsubstituted divalent aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted divalent cycloalkyl group having 3 to 30 carbon atoms.

In one embodiment of the present specification, Ar3 is a substituted or unsubstituted divalent aryl group having 6 to 15 carbon atoms, or a substituted or unsubstituted divalent cycloalkyl group having 3 to 15 carbon atoms.

In one embodiment of the present specification, the above-mentioned Ar3 is a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted divalent phenanthrenyl group, or a substituted or unsubstituted divalent Cycloalkyl.

In one embodiment of the present specification, the above-mentioned Ar3 is a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted divalent phenanthrene group, or a substituted or unsubstituted cyclohexylene group .

In one Embodiment of this specification, said Ar3 is a phenylene group, a naphthylene group, a divalent phenanthrene group, or a cyclohexylene group.

In one embodiment of the present specification, the above-mentioned Ar3 is a naphthylene group, a divalent phenanthrene group, or a cyclohexylene group.

In one embodiment of the present specification, Ar3 is a substituted or unsubstituted divalent tricyclic or more aryl group, or a substituted or unsubstituted divalent cycloalkyl group.

In one Embodiment of this specification, the said Ar3 is a divalent tricyclic aryl group or more, or a divalent cycloalkyl group.

In one embodiment of the present specification, the above-mentioned Ar3 is a divalent phenanthrene group or a cyclohexylene group.

In one Embodiment of this specification, the said Ar3 is a substituted or unsubstituted divalent alkyl group.

In one embodiment of the present specification, the above-mentioned Ar3 is a substituted or unsubstituted divalent alkyl group having 1 to 60 carbon atoms.

In one embodiment of the present specification, the above-mentioned Ar3 is a substituted or unsubstituted divalent alkyl group having 1 to 30 carbon atoms.

In one embodiment of the present specification, the above-mentioned Ar3 is a substituted or unsubstituted divalent alkyl group having 1 to 15 carbon atoms.

In one embodiment of the present specification, the above-mentioned Ar3 is a divalent alkyl group substituted or unsubstituted with an aryl group.

In one embodiment of the present specification, the above-mentioned Ar3 is a divalent alkyl group substituted or unsubstituted with a phenyl group.

In one embodiment of the present specification, the above-mentioned Ar3 is a methylene group substituted or unsubstituted with a phenyl group.

In one embodiment of the present specification, at least one of the above-mentioned X1 to X3 is N, and the rest are CH.

In one embodiment of the present specification, the above-mentioned X1 is N, and the rest are CH.

In one embodiment of the present specification, the above-mentioned X2 is N, and the rest are CH.

In one embodiment of the present specification, the above-mentioned X3 is N, and the rest are CH.

In one embodiment of the present specification, the above-mentioned X1 and X2 are N, and the rest are CH.

In one embodiment of the present specification, the above-mentioned X1 and X3 are N, and the rest are CH.

In one embodiment of the present specification, the above-mentioned X2 and X3 are N, and the rest are CH.

In one embodiment of this specification, the above-mentioned X1 to X3 are N.

In one Embodiment of this specification, the said L is a direct bond.

In one Embodiment of this specification, the said L is a substituted or unsubstituted arylene group.

In one embodiment of the present specification, the above-mentioned L is a substituted or unsubstituted arylene group having 6 to 60 carbon atoms.

In one embodiment of the present specification, the above-mentioned L is a substituted or unsubstituted arylene group having 6 to 30 carbon atoms.

In one embodiment of the present specification, the above-mentioned L is a substituted or unsubstituted arylene group having 6 to 15 carbon atoms.

In one Embodiment of this specification, the said L is a substituted or unsubstituted phenylene group.

In one Embodiment of this specification, the said L is a phenylene group.

Moreover, in one Embodiment of this specification, the said chemical formula 1 is selected from the following structural formula.

Moreover, in one Embodiment of this specification, the said chemical formula 3 is selected from the following structural formula.

The first and second organic material layers of the organic light-emitting device of the present specification may be formed of a single-layer structure, or may be formed of a multilayer structure in which two or more organic material layers are stacked. For example, the first organic layer of the present specification may be composed of 1 to 3 layers. Further, the organic light-emitting device of the present specification may have a structure including a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, etc. as an organic layer; or a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and the like. Implantation and transport layers, etc. as the structure of the organic layer. However, the structure of the organic light emitting device is not limited thereto, and may include a larger or smaller number of organic layers.

In one embodiment of the present specification, the organic light-emitting device further includes one or more layers selected from the group consisting of a hole injection layer, a hole transport layer, an electron injection layer, an electron blocking layer and a hole blocking layer.

In one embodiment of the present specification, the above-mentioned organic light-emitting device further includes one or more layers selected from a hole injection layer, a hole transport layer, an electron injection and transport layer, an electron blocking layer, and a hole blocking layer .

In one embodiment of the present specification, the organic light-emitting device further includes one or more layers selected from the group consisting of a hole injection layer, a hole transport layer, an electron injection and transport layer, a hole regulation layer, and an electron regulation layer .

In addition, the above organic light emitting device may further include an electron charge generation layer.

In one embodiment of the present specification, the organic light-emitting device includes: a first electrode; a second electrode provided to face the first electrode; and two layers provided between the first electrode and the second electrode the above light-emitting layer; comprising two or more first and second organic material layers between the two or more light-emitting layers and the first electrode, or between the two or more light-emitting layers and the second electrode, The above-mentioned two or more first and second organic substance layers respectively contain the compound represented by the above-mentioned Chemical Formula 1 or the compound represented by the above-mentioned Chemical Formula 3.

According to an embodiment of the present specification, the first organic layer includes a hole blocking layer or an electron regulating layer, the second organic layer includes an electron transport layer, and the hole blocking layer or electron regulating layer includes the compound represented by the above Chemical Formula 1 , the above-mentioned electron transport layer may contain the compound represented by the above-mentioned Chemical Formula 3.

According to an embodiment of the present specification, the first organic layer includes a hole blocking layer or an electron regulating layer, the second organic layer includes an electron injection and transport layer, and the hole blocking layer or the electron regulating layer includes the above-mentioned chemical formula 1. The above-mentioned electron injection and transport layer may contain the compound represented by the above-mentioned Chemical Formula 3.

In one embodiment of the present specification, the first and second organic material layers include, in addition to the organic material layer containing the above-mentioned compound, a hole injection layer or a hole transport layer comprising a hole injection layer or a hole transport layer containing Arylamino, carbazolyl or benzocarbazolyl compounds.

In another embodiment, the organic light-emitting device may be an organic light-emitting device having a structure (normal type) in which an anode, one or more organic material layers, and a cathode are sequentially stacked on a substrate.

In another embodiment, the organic light-emitting device may be an organic light-emitting device of an inverted structure (inverted type) in which a cathode, one or more organic material layers, and an anode are sequentially stacked on a substrate.

For example, the structure of an organic light emitting device according to an embodiment of the present specification is illustrated in FIGS. 1 to 4 .

FIG. 4 illustrates the structure of a general organic light-emitting device in which a substrate 1, an anode 2, a light-emitting layer 3, and a cathode 4 are stacked in this order. In addition, if referring to FIGS. 1 and 3 , the organic light emitting device according to an embodiment of the present specification may include 2 or more light emitting layers. In addition, each light-emitting layer may independently contain a fluorescent dopant or a phosphorescent dopant. When there are two light-emitting layers, one light-emitting layer may contain a fluorescent dopant, and the other layer may contain a phosphorescent dopant.

According to an example, the organic light-emitting device may include two or more light-emitting layers between the first electrode and the second electrode that emit light in wavelength ranges different from each other.

In addition, according to an embodiment of the present specification, the above-mentioned two or more light-emitting layers may be provided in the vertical direction from the first electrode to the second electrode, or may be provided in the horizontal direction.

2 illustrates the structure of an organic light emitting device in which a substrate 1, an anode 2, a hole transport layer 5, a light emitting layer 3, a hole blocking layer or electron regulation layer 6, an electron injection and transport layer 7, and a cathode 4 are stacked in this order. Referring to FIG. 2 , the organic light emitting device according to an embodiment of the present specification may include three or more light emitting layers. In addition, other layers may be further provided between each light-emitting layer and the light-emitting layer. In the case where the above-mentioned light-emitting layers are provided as three or more layers, each light-emitting layer may include a blue fluorescent light-emitting layer. In addition, in the structure shown in FIG. 3 , the compound represented by the above-mentioned Chemical Formula 1 may be contained in the above-mentioned hole blocking layer or the electron regulating layer 6 , and the compound represented by the above-mentioned Chemical Formula 3 may be contained in the electron injection and transport layer 7 middle.

In addition, according to an embodiment of the present specification, the above-mentioned three or more light-emitting layers may be provided in the vertical direction from the first electrode to the second electrode, or may be provided in the horizontal direction. More specifically, it may be arranged in a horizontal direction from the first electrode to the second electrode direction.

According to an embodiment of the present specification, the blue fluorescent light-emitting layer includes a host and a dopant, and the host may be any one selected from the following structures.

The organic light-emitting device of the present specification can be fabricated using materials and methods known in the technical field, except that one or more layers of the first or second organic layer contain the compounds of the present specification, that is, compounds represented by the above-mentioned Chemical Formulas 1 and 3. manufacture.

When the above-mentioned organic light-emitting device includes a plurality of first or second organic material layers, the above-mentioned organic material layers may be formed of the same substance or different substances.

The organic light-emitting device of the present specification can utilize materials known in the technical field and other than the compound represented by any one of the above-mentioned Chemical Formulas 1 and 3, except that one or more layers of the first or second organic substance layer contain the above-mentioned compound. method to manufacture.

For example, the organic light-emitting device of the present specification can be manufactured by sequentially stacking a first electrode, first and second organic substance layers, and a second electrode on a substrate. In this case, it can be produced by depositing a metal or having conductivity on a substrate by a PVD (physical vapor deposition) method such as sputtering or e-beam evaporation. metal oxides or their alloys to form an anode, and then an organic layer including a hole injection layer, a hole transport layer, a light emitting layer and an electron transport layer is formed on the anode, and then vapor deposition on the organic layer can be used as Made from the cathode material. In addition to this method, an organic light-emitting device may be manufactured by sequentially depositing a cathode material, an organic material layer, and an anode material on a substrate.

In addition, the compounds of the above-mentioned Chemical Formulas 1 and 3 can be used not only by a vacuum evaporation method but also by a solution coating method to form an organic layer when manufacturing an organic light-emitting device. Here, the solution coating method refers to a spin coating method, a dip coating method, a blade coating method, an ink jet printing method, a screen printing method, a spray method, a roll coating method, or the like, but is not limited thereto.

In addition to these methods, an organic light-emitting device can be produced by sequentially depositing a cathode material, an organic material layer, and an anode material on a substrate (International Patent Application Publication No. 2003/012890). However, the manufacturing method is not limited to this.

In one embodiment of the present specification, the first electrode is an anode, and the second electrode is a cathode.

In another embodiment, the first electrode is a cathode, and the second electrode is an anode.

The anode material is preferably a material with a large work function in order to allow smooth injection of holes in general. Specific examples of anode materials that can be used in the present invention include metals such as vanadium, chromium, copper, zinc, and gold, or alloys thereof; zinc oxide, indium oxide, indium tin oxide (ITO), and indium zinc oxide (IZO) Metal oxides such as ZnO:Al or SnO ₂ :Sb and other metals and oxides; poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDOT), conductive polymers such as polypyrrole and polyaniline, etc., but not limited thereto.

As the cathode material, generally, in order to facilitate electron injection, a material having a small work function is preferable. Specific examples of the cathode material include metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, and lead, or their alloys; LiF/Al, LiO ₂ /Al, etc. Layer structure substances, etc., but not limited to this.

The hole-injecting substance is a layer that injects holes from the electrode, and the hole-injecting substance is preferably a compound that has the ability to transport holes, has the effect of injecting holes from the anode, and has the effect of injecting holes from the anode, and having the ability to transport holes in the light-emitting layer or the light-emitting material. It has excellent hole injection effect, prevents excitons generated in the light-emitting layer from migrating to the electron injection layer or electron injection material, and is a compound with excellent thin film forming ability. Preferably, the HOMO (highest occupied molecular orbital) of the hole injecting material is between the work function of the anode material and the HOMO of the surrounding organic material layer. Specific examples of the hole-injecting substance include porphyrin, oligothiophene, arylamine-based organic matter, hexanitrile hexaazatriphenylene-based organic matter, quinacridone-based organic matter, perylene ( perylene) organic compounds, anthraquinone, polyaniline and polythiophene-based conductive polymers, etc., but not limited to this.

The above-mentioned hole transport layer is a layer that receives holes from the hole injection layer and transports the holes to the light emitting layer, and the hole transport substance is a layer capable of receiving holes from the anode or the hole injection layer and transferring them to the light emitting layer A material with high mobility for holes is suitable. Specific examples include arylamine-based organic substances, conductive polymers, and block copolymers in which both a conjugated portion and a non-conjugated portion are present, but the present invention is not limited thereto.

唑、苯并噻唑及苯并咪唑系化合物；聚(对亚苯基亚乙烯基)(PPV)系高分子；螺环(spiro)化合物；聚芴；红荧烯等，但不仅限于此。The light-emitting substance is a substance that can receive holes and electrons from the hole transport layer and the electron transport layer, respectively, and combine them to emit light in the visible light region, and is preferably a substance with high quantum efficiency for fluorescence or phosphorescence. Specific examples include 8-hydroxyquinoline aluminum complex (Alq ₃ ), carbazole-based compound, dimerized styryl compound; BAlq; 10-hydroxybenzoquinoline-metal compound;

azoles, benzothiazoles, and benzimidazole-based compounds; poly(p-phenylene vinylene) (PPV)-based polymers; spiro compounds; polyfluorenes; rubrene, etc., but not limited thereto.

The above-mentioned electron transport material is a layer that receives electrons from the electron injection layer and transports the electrons to the light emitting layer.

唑、

二唑、三唑、咪唑、苝四羧酸、亚芴基甲烷、蒽酮等和它们的衍生物、金属配位化合物、以及含氮五元环衍生物等，但并不限定于此。The above-mentioned electron injection layer is a layer that injects electrons from the electrode, and is preferably a compound that has the ability to transport electrons, has the effect of injecting electrons from the cathode, has an excellent electron injection effect to the light-emitting layer or light-emitting material, and prevents the light-emitting layer The excitons generated in the compound migrate to the hole injection layer and have excellent thin film forming ability. Specifically, there are fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide,

azole,

Diazoles, triazoles, imidazoles, perylenetetracarboxylic acids, fluorenylene methanes, anthrone, etc., their derivatives, metal complexes, nitrogen-containing five-membered ring derivatives, etc., but not limited thereto.

Examples of the aforementioned metal complex include lithium 8-quinolinate, bis(8-quinolinolato)zinc, bis(8-quinolinolato)copper, bis(8-quinolinolato)manganese, tris(8-hydroxyquinoline) Quinoline)aluminum, tris(2-methyl-8-hydroxyquinoline)aluminum, tris(8-hydroxyquinoline)gallium, bis(10-hydroxybenzo[h]quinoline)beryllium, bis(10-hydroxyl) Benzo[h]quinoline)zinc, bis(2-methyl-8-quinoline)gallium chloride, bis(2-methyl-8-quinoline)(o-cresol)gallium, bis(2-methyl) yl-8-quinoline)(1-naphthol)aluminum, bis(2-methyl-8-quinoline)(2-naphthol)gallium, etc., but not limited thereto.

The above-mentioned hole blocking layer is a layer that prevents holes from reaching the cathode, is a layer that regulates electrons reaching the light-emitting layer, and can be an electron regulating layer. In addition, the above-mentioned electron charge generation layer is a layer that generates electron charge.

The organic light emitting device according to the present specification may be of a top emission type, a bottom emission type or a bidirectional emission type according to the materials used.

way of implementing the invention

The production of the organic light-emitting device including the compounds represented by the above-mentioned Chemical Formulas 1 and 3 is specifically described in the following Examples. However, the following examples are for illustrating the present specification, and the scope of the present specification is not limited thereto.

Production Example 1: Production of Compound EC1

After the above-mentioned compound EC1-A (10 g, 26.6 mmol) and the above-mentioned compound EC1-B (12.3 g, 26.6 mmol) were completely dissolved in tetrahydrofuran (100 mL), potassium carbonate (11.0 g, 79.7 mmol) was dissolved in 50 mL of water to obtain a solution. to add. After adding tetrakis(triphenylphosphine)palladium (0.92 g, 0.797 mmol), the mixture was heated and stirred for 8 hours. After the temperature was lowered to normal temperature to complete the reaction, the potassium carbonate solution was removed and the white solid was filtered. The filtered white solid was washed twice with tetrahydrofuran and ethyl acetate, respectively, to prepare compound EC1 (15.4 g, yield 81%).

MS[M+H] ⁺ = 716

Production Example 2: Production of Compound EC2

The compound represented by the above-mentioned chemical formula EC2 was produced by the same method as the production method of EC1 of Production Example 1, except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 553

Production Example 3: Production of Compound EC3

The compound represented by the above-mentioned chemical formula EC3 was produced by the same method as the production method of EC1 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 640

Production Example 4: Production of Compound EC4

The compound represented by the above-mentioned chemical formula EC4 was produced by the same method as the production method of EC1 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 640

Production Example 5: Production of Compound EC5

After the above-mentioned compound EC5-A (10 g, 17.1 mmol) and the above-mentioned compound EC5-B (9.2 g, 34.2 mmol) were completely dissolved in tetrahydrofuran (100 mL), potassium carbonate (7.1 g, 51.3 mmol) was dissolved in 50 mL of water to obtain a solution. to add. After adding tetrakis(triphenylphosphine)palladium (0.59 g, 0.513 mmol), the mixture was heated and stirred for 8 hours. After the temperature was lowered to normal temperature to complete the reaction, the potassium carbonate solution was removed and the white solid was filtered. The filtered white solid was washed twice with tetrahydrofuran and ethyl acetate, respectively, to prepare compound EC5 (9.5 g, yield 70%).

MS[M+H] ⁺ = 795

Production Example 6: Production of Compound EC6

The compound represented by the above-mentioned chemical formula EC6 was produced by the same method as the production method of EC1 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 807

Production Example 7: Production of Compound EC7

The compound represented by the above-mentioned chemical formula EC7 was produced by the same method as the production method of EC1 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 654

Production Example 8: Production of Compound EC8

The compound represented by the above-mentioned chemical formula EC8 was produced by the same method as the production method of EC1 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 821

Production Example 9: Production of Compound EC9

The compound represented by the above-mentioned chemical formula EC9 was produced by the same method as the production method of EC1 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 848

Production Example 10: Production of Compound EC10

The compound represented by the above-mentioned chemical formula EC10 was produced by the same method as the production method of EC1 of Production Example 1, except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 537

Production Example 11: Production of Compound ET1

The compound represented by the above-mentioned chemical formula ET1 was produced by the same method as the production method of EC5 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 799

Production Example 12: Production of Compound ET2

The compound represented by the above-mentioned chemical formula ET2 was produced by the same method as the production method of EC5 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ =743

Production Example 13: Production of Compound ET3

The compound represented by the above-mentioned chemical formula ET3 was produced by the same method as the production method of EC5 of Production Example 1, except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 763

Production Example 14: Production of Compound ET4

The compound represented by the above-mentioned chemical formula ET4 was produced by the same method as the production method of EC5 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 591

Production Example 15: Production of Compound ET5

The compound represented by the above-mentioned chemical formula ET5 was produced by the same method as the production method of EC5 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 791

Production Example 16: Production of Compound ET6

The compound represented by the above-mentioned chemical formula ET6 was produced by the same method as the production method of EC5 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 759

Production Example 17: Production of Compound ET7

The compound represented by the above-mentioned chemical formula ET7 was produced by the same method as the production method of EC5 of Production Example 1 except that each starting material was used as in the above-mentioned reaction formula.

MS[M+H] ⁺ = 699

Example 1-1

的厚度被涂布成薄膜的玻璃基板放入溶解有洗涤剂的蒸馏水中，利用超声波进行洗涤。这时，洗涤剂使用菲希尔公司(Fischer Co.)制品，蒸馏水使用了利用密理博公司(Millipore Co.)制造的过滤器(Filter)过滤两次的蒸馏水。将ITO洗涤30分钟后，用蒸馏水重复两次而进行10分钟超声波洗涤。在蒸馏水洗涤结束后，用异丙醇、丙酮、甲醇的溶剂进行超声波洗涤并干燥后，输送至等离子体清洗机。此外，利用氧等离子体，将上述基板清洗5分钟后，将基板输送至真空蒸镀机。ITO (indium tin oxide, indium tin oxide) with

The thickness of the glass substrate coated as a thin film is put into distilled water in which detergent is dissolved, and washed with ultrasonic waves. At this time, a Fischer Co. product was used as the detergent, and distilled water filtered twice by a Millipore Co. filter was used for the distilled water. After washing with ITO for 30 minutes, ultrasonic washing was performed for 10 minutes by repeating twice with distilled water. After washing with distilled water, ultrasonic washing was performed with a solvent of isopropanol, acetone, and methanol, followed by drying, and then transported to a plasma cleaning machine. Moreover, after the said board|substrate was wash|cleaned for 5 minutes by oxygen plasma, the board|substrate was conveyed to a vacuum vapor deposition machine.

的厚度进行热真空蒸镀而形成空穴注入层。在上述空穴注入层上，依次真空蒸镀下述HAT化合物

和下述HT-A化合物

而形成空穴传输层。On the thus prepared ITO transparent electrode, the following HI-A compound was prepared as

A hole injection layer was formed by thermal vacuum evaporation. On the above hole injection layer, the following HAT compounds were sequentially vacuum-deposited

and the following HT-A compounds

A hole transport layer is formed.

将BH化合物和下述BD化合物以25:1的重量比进行真空蒸镀而形成发光层。Next, on the above-mentioned hole transport layer, a film thickness of

The light-emitting layer was formed by vacuum-evaporating the BH compound and the following BD compound at a weight ratio of 25:1.

的厚度形成空穴阻挡层。在上述空穴阻挡层上，将上述化合物ET1和下述LiQ化合物以1:1的重量比进行真空蒸镀，从而以

的厚度形成电子注入和传输层。在上述电子注入和传输层上，依次将氟化锂(LiF)以

的厚度、将铝以

的厚度进行蒸镀，从而形成阴极。On the above-mentioned light-emitting layer, the above-mentioned compound EC1 was vacuum-evaporated to form a

thickness to form a hole blocking layer. On the above-mentioned hole blocking layer, the above-mentioned compound ET1 and the following LiQ compound were vacuum-evaporated at a weight ratio of 1:1, so as to obtain a

The thickness of the electron injection and transport layer is formed. On the above electron injection and transport layer, lithium fluoride (LiF) was sequentially

thickness, aluminum to

The thickness is evaporated to form a cathode.

阴极的氟化锂维持

的蒸镀速度，铝维持

的蒸镀速度，在蒸镀时，真空度维持1×10^-7至5×10^-5托，从而制造了有机发光器件。During the above process, the evaporation rate of organic matter is maintained from 0.4 to

Lithium fluoride maintenance of the cathode

The evaporation rate of aluminum maintains

The vapor deposition rate is 100%, and the vacuum degree is maintained at 1×10 ^-7 to 5×10 ^-5 Torr during the vapor deposition, thereby fabricating an organic light-emitting device.

Examples 1-2 to 1-18 and Comparative Examples 1-1 to 1-18

An organic light-emitting device was produced by the same method as in Example 1-1, except that the compounds of the following Table 1 were used in place of the compounds EC1 and ET1 of the above-mentioned Example 1-1.

For the organic light-emitting devices manufactured in the above-mentioned Examples 1-1 to 1-18 and Comparative Examples 1-1 to 1-18, the driving voltage and the luminous efficiency were measured at a current density of 10 mA/cm ² , and at 20 mA/cm ² The time required to reach 90% of the initial brightness (T90) was measured at a current density of . The above results are shown in Table 1 below.

[Table 1]

In Table 1 above, if Examples 1-1 to 1-18 are compared with Comparative Examples 1-1 to 1-18, the organic light-emitting devices according to Chemical Formula 1 and Chemical Formula 3 of the present specification are applied, and only Compared with the organic light-emitting device of Chemical Formula 1 or Chemical Formula 3, it is remarkably excellent in lifetime.

Example 2-1

的厚度被涂布成薄膜的玻璃基板放入溶解有洗涤剂的蒸馏水中，利用超声波进行洗涤。这时，洗涤剂使用菲希尔公司制品，蒸馏水使用了利用密理博公司制造的过滤器过滤两次的蒸馏水。将ITO洗涤30分钟后，用蒸馏水重复两次而进行10分钟超声波洗涤。在蒸馏水洗涤结束后，用异丙醇、丙酮、甲醇的溶剂进行超声波洗涤并干燥后，输送至等离子体清洗机。此外，利用氧等离子体，将上述基板清洗5分钟后，将基板输送至真空蒸镀机。ITO (Indium Tin Oxide)

The thickness of the glass substrate coated as a thin film is put into distilled water in which detergent is dissolved, and washed with ultrasonic waves. At this time, a product of Fischer Co., Ltd. was used for the detergent, and distilled water that was filtered twice by a filter made by Millipore Co., Ltd. was used for the distilled water. After washing with ITO for 30 minutes, ultrasonic washing was performed for 10 minutes by repeating twice with distilled water. After washing with distilled water, ultrasonic washing was performed with a solvent of isopropanol, acetone, and methanol, followed by drying, and then transported to a plasma cleaning machine. Moreover, after the said board|substrate was wash|cleaned for 5 minutes by oxygen plasma, the board|substrate was conveyed to a vacuum vapor deposition machine.

的厚度进行热真空蒸镀而形成第一空穴注入层。在上述第一空穴注入层上，依次真空蒸镀下述HAT化合物

和下述HT-A化合物

而形成第一空穴传输层。On the thus prepared ITO transparent electrode, the following HI-A compound was prepared as

The thickness of the first hole injection layer is formed by thermal vacuum evaporation. On the above-mentioned first hole injection layer, the following HAT compounds were sequentially vacuum-deposited

and the following HT-A compounds

Thus, a first hole transport layer is formed.

将BH化合物和下述BD化合物以25:1的重量比进行真空蒸镀而形成第一发光层。Next, on the above-mentioned first hole transport layer, a film thickness of

The first light-emitting layer was formed by vacuum-evaporating the BH compound and the following BD compound at a weight ratio of 25:1.

的厚度形成第一空穴阻挡层。在上述第一空穴阻挡层上，将上述化合物ET1与下述LiQ化合物以1:1的重量比进行真空蒸镀，从而以

的厚度形成第一电子注入和传输层。On the above-mentioned first light-emitting layer, the above-mentioned compound EC1 is vacuum-evaporated to obtain a

The thickness of the first hole blocking layer is formed. On the above-mentioned first hole blocking layer, the above-mentioned compound ET1 and the following LiQ compound were vacuum-evaporated in a weight ratio of 1:1, so as to obtain a

of thickness to form the first electron injection and transport layer.

将化合物ET-C和锂化合物以100:2的重量比进行真空蒸镀而形成电子电荷生成层。在上述电子电荷生成层上，将HI-A化合物以

的厚度进行热真空蒸镀而形成第二空穴注入层。On the above-mentioned first electron injection and transport layer, with a film thickness

The electron charge generation layer was formed by vacuum-evaporating the compound ET-C and the lithium compound at a weight ratio of 100:2. On the above-mentioned electron charge generation layer, the HI-A compound is

The thickness of the second hole injection layer is formed by thermal vacuum evaporation.

和下述HT-A化合物

而形成第二空穴传输层。On the second hole injection layer described above, the following HAT compounds were sequentially vacuum-deposited

and the following HT-A compounds

And the second hole transport layer is formed.

将BH化合物和下述BD化合物以25:1的重量比进行真空蒸镀而形成第二发光层。Next, on the above-mentioned second hole transport layer, a film thickness of

The second light-emitting layer was formed by vacuum-evaporating the BH compound and the following BD compound at a weight ratio of 25:1.

的厚度形成空穴阻挡层。在上述第二空穴阻挡层上，将上述化合物ET1和下述LiQ化合物以1:1的重量比进行真空蒸镀，从而以

的厚度形成第二电子注入和传输层。在上述第二电子注入和传输层上，依次将氟化锂(LiF)以

的厚度、将铝以

的厚度进行蒸镀，从而形成阴极。On the second light-emitting layer, the compound EC1 was vacuum-evaporated to

thickness to form a hole blocking layer. On the above-mentioned second hole blocking layer, the above-mentioned compound ET1 and the following LiQ compound were vacuum-evaporated at a weight ratio of 1:1, so as to obtain a

A second electron injection and transport layer is formed. On the above-mentioned second electron injection and transport layer, lithium fluoride (LiF) was sequentially added to

thickness, aluminum to

The thickness is evaporated to form a cathode.

阴极的氟化锂维持

的蒸镀速度，铝维持

的蒸镀速度，在蒸镀时，真空度维持1×10^-7至5×10^-5托，从而制造了有机发光器件。During the above process, the evaporation rate of organic matter is maintained from 0.4 to

Lithium fluoride maintenance of the cathode

The evaporation rate of aluminum maintains

The vapor deposition rate is 100%, and the vacuum degree is maintained at 1×10 ^-7 to 5×10 ^-5 Torr during the vapor deposition, thereby fabricating an organic light-emitting device.

Examples 2-2 to 2-18 and Comparative Examples 2-1 to 2-18

An organic light-emitting device was produced by the same method as in Example 2-1, except that the compounds of the following Table 1 were used in place of the compounds EC1 and ET1 of the above-mentioned Example 2-1.

For the organic light-emitting devices manufactured in the above-mentioned Examples 2-2 to 2-18 and Comparative Examples 2-1 to 2-18, the driving voltage and the luminous efficiency were measured at a current density of 10 mA/cm ² , and at 20 mA/cm ² The time required to reach 90% of the initial brightness (T90) was measured at a current density of . The above results are shown in Table 2 below.

[Table 2]

In Table 2 above, if Examples 2-1 to 2-18 are compared with Comparative Examples 2-1 to 2-18, the organic light-emitting devices according to Chemical Formula 1 and Chemical Formula 3 of the present specification are applied, and only Compared with the organic light-emitting device of Chemical Formula 1 or Chemical Formula 3, it is remarkably excellent in lifetime.

Example 3

Electron affinity (eV) values of compounds EC1 to EC10, ET1 to ET7, and ET-A to ET-B according to an embodiment of the present specification are shown in Table 3 below.

[table 3]

compound Electron Affinity (eV) EC1 1.38 EC2 1.26 EC3 1.42 EC4 1.32 EC5 1.67 EC6 1.60 EC7 1.36 EC8 1.38 EC9 1.56 EC10 1.17 ET1 1.85 ET2 1.7 ET3 1.53 ET4 1.69 ET5 1.55 ET6 1.74 ET7 1.68 ET-A 1.45 ET-B 1.41

The above-mentioned electron affinity (eV) was carried out by using the quantum chemical calculation program Gauss 03 manufactured by Gaussian Corporation in the United States, and by using density functional theory (DFT), B3LYP was used as a functional function, and 6- was used as a basis function. 31G*, for the optimal structure, the calculated value was obtained by time-varying density functional theory (TD-DFT). Organic luminescence having a relationship of E _Et > E _Ec in the electron affinity (eV) relationship of the compound of the above Chemical Formula 1 for the hole blocking layer and the compound of the above Chemical Formula 3 for the electron injection and transport layer of the above Table 3 In the device, the above-mentioned Chemical Formula 1 as the hole blocking layer (or electron regulating layer) compound appropriately controls the amount of electrons transferred from the above-mentioned Chemical Formula 3 as the electron injecting and transporting compound, thereby improving the efficiency and lifetime of the organic light-emitting device.

Claims (13)

1. An organic light-emitting device comprising: a first electrode, a second electrode provided opposite to the first electrode, and a first electrode provided between the first electrode and the second electrode an organic layer and a second organic layer, wherein the first organic layer contains a compound represented by the following Chemical Formula 1, and The second organic layer includes a compound represented by the following Chemical Formula 3: Chemical formula 1

In Chemical Formula 1, X is O or S, R1 to R4 are the same or different from each other and are each independently hydrogen, deuterium, halogen group, cyano, nitro, substituted or unsubstituted alkyl, substituted or unsubstituted haloalkyl, substituted or unsubstituted haloalkoxy substituted or unsubstituted cycloalkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclyl, or adjacent groups combined with each other to form a substituted or unsubstituted substituted ring, At least one of R1 to R4 is represented by the following chemical formula 2A or 2B, n1 to n4 are each independently an integer of 1 to 4, Chemical formula 2A

Chemical formula 2B

In Chemical Formulas 2A and 2B, At least one of A1 to A3 is N, and the rest are CH, or combined with adjacent groups in L1, L2, L3, Ar4 and Ar5 to form a substituted or unsubstituted ring, L1 to L3 are the same as or different from each other, and are each independently a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted divalent heterocyclic group, or a group adjacent to A1 to A3 group together to form substituted or unsubstituted rings, Ar4 and Ar5 are the same or different from each other, and are each independently hydrogen, deuterium, substituted or unsubstituted aryl group, or substituted or unsubstituted heterocyclic group, or formed by combining with adjacent groups among A1 to A3 substituted or unsubstituted rings, Ar6 is hydrogen, deuterium, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclic group, a is an integer from 0 to 5, chemical formula 3

In Chemical Formula 3, Ar1 and Ar2 are each a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group, Ar3 is a substituted or unsubstituted 2- to 4-valent alkyl group, a substituted or unsubstituted 2- to 4-valent aryl group, or a substituted or unsubstituted 2- to 4-valent cycloalkyl group, At least one of X1 to X3 is N, the rest are CH, L is a direct bond, or a substituted or unsubstituted arylene group, n5 is an integer from 2 to 4, In the chemical formulae 1 to 3, when the a and n1 to n5 are each independently 2 or more, the substituents in parentheses are the same or different from each other. 2. The organic light-emitting device of claim 1, wherein the Chemical Formula 1 is represented by any one of the following Chemical Formulas 1-1 to 1-5: Chemical formula 1-1

Chemical formula 1-2

Chemical formula 1-3

Chemical formula 1-4

Chemical formula 1-5

In the Chemical Formula 1-1 to Chemical Formula 1-5, The definitions of X, R1 to R4, L1 to L3, A1 to A3, Ar4, Ar5 and n1 to n4 are the same as those in claim 1, L1', L2', L3', A1', A2', A3', Ar4' and Ar5' each have the same definitions as described for L1, L2, L3, A1, A2, A3, Ar4 and Ar5. 3. The organic light-emitting device according to claim 1, wherein the Ar3 is a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted divalent phenanthrenyl group, or a substituted or unsubstituted divalent cycloalkyl. 4. The organic light-emitting device of claim 1, wherein the chemical formula 1 is selected from the following structural formulas:

5. The organic light-emitting device according to claim 1, wherein the chemical formula 3 is selected from the following structural formulas:

6 . The organic light-emitting device according to claim 1 , wherein the compound represented by the chemical formula 1 and the compound represented by the chemical formula 3 satisfy the following formula 1: Formula 1 E _Et >E _Ec In the formula 1, E _Et is the electron affinity (eV) of the compound represented by the Chemical Formula 3, and E _Ec is the electron affinity (eV) of the compound represented by the Chemical Formula 1. 7. The organic light-emitting device of claim 1, wherein the first organic layer is a hole blocking layer or an electron regulating layer. 8. The organic light-emitting device of claim 1, wherein the second organic layer is an electron transport layer or an electron injection and transport layer. 9 . The organic light-emitting device according to claim 1 , wherein the organic light-emitting device includes, between the first electrode and the second electrode, two or more light-emitting layers that emit light in wavelength ranges different from each other. 10 . . 10. The organic light-emitting device of claim 1, wherein the organic light-emitting device comprises two or more light-emitting layers between the first electrode and the second electrode, and Each light-emitting layer independently contains a fluorescent dopant or a phosphorescent dopant. 11. The organic light-emitting device of claim 1, wherein the organic light-emitting device comprises two or more light-emitting layers between the first electrode and the second electrode, and Either one of the light-emitting layers contains a fluorescent dopant, and the other light-emitting layer contains a phosphorescent dopant. 12. The organic light-emitting device of claim 1, wherein the organic light-emitting device comprises three or more light-emitting layers between the first electrode and the second electrode, and Each light-emitting layer includes a blue fluorescent light-emitting layer. 13 . The organic light-emitting device according to claim 12 , wherein the three or more light-emitting layers are sequentially arranged along the direction from the first electrode to the second electrode. 14 .

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