CN117751153A

CN117751153A - Polymer and organic light-emitting element using same

Info

Publication number: CN117751153A
Application number: CN202280050365.8A
Authority: CN
Inventors: 金志勋; 金珠焕; 姜成京; 金东阭; 禹儒真; 李载澈; 李志永; 郑世真
Original assignee: LG Chem Ltd
Current assignee: LG Chem Ltd
Priority date: 2021-07-21
Filing date: 2022-06-21
Publication date: 2024-03-22
Also published as: KR20230014355A

Abstract

The present specification relates to a polymer and an organic light emitting device using the same, the polymer comprising: a first unit represented by chemical formula 1; a second unit represented by chemical formula 1 and different from the first unit; a third unit represented by chemical formula 2; and a terminal group represented by chemical formula 3.

Description

Polymer and organic light-emitting element using same

Technical Field

The present application claims priority and rights of korean patent application nos. 10-2021-0095599 and 10-2021-0095600, filed on 7.21 of 2021 to the korean intellectual property office, the entire contents of which are incorporated herein by reference.

The present specification relates to polymers and organic light emitting devices formed by using the same.

Background

The organic light emitting phenomenon is one of examples of converting current into visible light through an internal process of a specific organic molecule. The principle of the organic light emitting phenomenon is as follows. When an organic material layer is provided between a positive electrode and a negative electrode, if a current is applied between the two electrodes, electrons and holes are injected into the organic material layer from the negative electrode and the positive electrode, respectively. Electrons and holes injected into the organic material layer are recombined to form excitons, and the excitons fall back to the ground state again to emit light. An organic electroluminescent device utilizing this principle may generally be composed of a negative electrode, a positive electrode, and an organic material layer (for example, an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer) disposed therebetween.

The material for the organic light emitting device is mainly a pure organic material or a complex compound in which an organic material and a metal form a complex, and may be classified into a hole injecting material, a hole transporting material, a light emitting material, an electron transporting material, an electron injecting material, and the like according to the use thereof. Here, an organic material having p-type characteristics (i.e., an organic material that is easily oxidized and has an electrochemically stable state during oxidation) is generally used as the hole injection material or the hole transport material. Meanwhile, an organic material having n-type characteristics (i.e., an organic material that is easily reduced and has an electrochemically stable state during reduction) is generally used as an electron injecting material or an electron transporting material. As the light emitting material, a material having both p-type characteristics and n-type characteristics, that is, a material having a stable form in both an oxidized state and a reduced state, and a material having high light emitting efficiency for converting excitons into light when the excitons are formed are preferable.

In addition to those mentioned above, materials preferably used for the organic light emitting device have the following characteristics in addition.

First, it is preferable that the material for the organic light emitting device has excellent thermal stability. This is because joule heating occurs due to movement of charges in the organic light emitting device. Currently, since N, N '-bis (1-naphthyl) -N, N' -diphenyl- (1, 1 '-biphenyl) -4,4' -diamine (NPB) generally used as a hole transport layer material has a glass transition temperature value of 100 ℃ or less, there is a problem in that it is difficult to use the material in an organic light emitting device requiring a high current.

Second, in order to obtain a high-efficiency organic light emitting device capable of being driven at a low voltage, it is necessary to smoothly transfer holes or electrons injected into the organic light emitting device to a light emitting layer, and at the same time, to prevent the injected holes and electrons from being released from the light emitting layer. For this reason, materials for organic light emitting devices are required to have an appropriate band gap and an appropriate Highest Occupied Molecular Orbital (HOMO) or Lowest Unoccupied Molecular Orbital (LUMO) energy level. Since poly (3, 4-ethylenedioxythiophene) doped poly (styrenesulfonic acid) (PEDOT: PSS) currently used as a hole transport material in an organic light emitting device to be manufactured by a solution application method has a lower LUMO level than that of an organic material used as a light emitting layer material, it is difficult to manufacture an organic light emitting device having high efficiency and long service life.

In addition, materials for organic light emitting devices are required to have excellent chemical stability, excellent charge mobility, excellent interface characteristics with electrodes or adjacent layers, and the like. That is, the material for the organic light emitting device needs to minimize deformation caused by moisture or oxygen. In addition, the material for the organic light emitting device needs to have an appropriate hole or electron mobility to balance between densities of holes and electrons in the light emitting layer of the organic light emitting device, thereby maximizing formation of excitons. In addition, for the stability of the device, the material for the organic light emitting device needs to improve the interface with the electrode containing a metal or a metal oxide.

In addition to those mentioned above, materials used in the organic light emitting device for the solution method are required to have the following characteristics in addition.

First, materials for organic light emitting devices need to form storable homogeneous solutions. Since commercial materials used for the deposition method have good crystallinity, the materials are not well dissolved in the solution, or crystals thereof are easily formed even if the materials are formed into a solution, there is a high possibility that the concentration gradient of the solution changes with the storage time, or defective devices are formed.

Second, the layer subjected to the solution method needs to have solvent resistance and material resistance to other layers. For this reason, after introducing the curing group and applying the solution, a material capable of forming a self-crosslinked polymer such as N4, N4' -bis (naphthalen-1-yl) -N4, N4' -bis (4-vinylphenyl) biphenyl-4, 4' -diamine (VNPB) on the substrate by heat treatment or Ultraviolet (UV) irradiation, or a material capable of forming a polymer having sufficient resistance in the subsequent process is preferable, and a material capable of itself having solvent resistance such as hexaazabenzophenanthrene Hexanitrile (HATCN) is also preferable.

There is therefore a need to develop organic materials having the aforementioned requirements in the art.

Disclosure of Invention

Technical problem

The present specification provides polymers and organic light emitting devices formed using the same.

Technical proposal

An exemplary embodiment of the present specification provides a polymer comprising: a first unit represented by the following chemical formula 1; a second unit represented by the following chemical formula 1 and different from the first unit; a third unit represented by the following chemical formula 2; and a terminal group represented by the following chemical formula 3.

[ chemical formula 1]

[ chemical formula 2]

[ chemical formula 3]

＊-[E]

In the chemical formulas 1 to 3,

l1, L3 and L4 are the same or different from each other and are each independently a direct bond; or a substituted or unsubstituted arylene group,

ar1, ar2 and L2 are the same or different from each other and are each independently a substituted or unsubstituted arylene group,

r1 and R2 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group,

r10 and R11 are the same or different from each other and are each independently a substituted or unsubstituted alkyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; or a substituted or unsubstituted arylamine group,

n1 and n2 are each an integer of 1 to 4, and when n1 and n2 are each 2 or more, substituents in brackets are the same or different from each other,

m is an integer of 3 or 4,

when m is 3, Z is CRa; siRa; n; or a substituted or unsubstituted trivalent aryl group,

when m is 4, Z is C; si; or a substituted or unsubstituted tetravalent aryl group,

ra is hydrogen; deuterium; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group,

y is a direct bond; a substituted or unsubstituted alkylene group; or a substituted or unsubstituted arylene group,

when Y is a direct bond or a substituted or unsubstituted alkylene group, Z is a substituted or unsubstituted trivalent or tetravalent aryl group,

e is hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; substituted or unsubstituted aryl; a substituted or unsubstituted arylamine group; a substituted or unsubstituted siloxane group; a substituted or unsubstituted heterocyclic group; a crosslinkable group; or a combination thereof, and

* Is the point of attachment in the polymer.

Another exemplary embodiment of the present specification provides an organic light emitting device, including: a first electrode; a second electrode; and an organic material layer having one or more layers disposed between the first electrode and the second electrode, wherein one or more of the organic material layers comprises the polymer.

Advantageous effects

The polymer according to one exemplary embodiment of the present specification easily adjusts electrical characteristics by simultaneously including first and second units different from each other. Therefore, an effect of improving hole mobility is exhibited.

In addition, the polymer according to one exemplary embodiment of the present specification may be applied to an organic material layer of an organic light emitting device, and thus may improve performance and lifetime characteristics of the device. In particular, the polymer according to one exemplary embodiment of the present specification may be applied to a hole transport layer of an organic light emitting device to improve efficiency and/or lifetime of the device.

Drawings

Fig. 1 and 2 are diagrams illustrating structures of organic light emitting devices according to some exemplary embodiments of the present specification.

1. Substrate

2. Anode

3. Light-emitting layer

4. Cathode electrode

5. Hole injection layer

6. Hole transport layer

7. Electron injection and transport layers

Detailed Description

Hereinafter, the present specification will be described in detail.

The present specification provides a polymer comprising: a first unit represented by the following chemical formula 1; a second unit represented by the following chemical formula 1 and different from the first unit; a third unit represented by the following chemical formula 2; and a terminal group represented by the following chemical formula 3.

[ chemical formula 1]

[ chemical formula 2]

[ chemical formula 3]

＊-[E]

In the chemical formulas 1 to 3,

m is an integer of 3 or 4,

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, the polymer includes a first unit and a second unit that are different from each other. When only the first unit or only the second unit is included, there is a problem in that it is difficult to finely adjust the electrical characteristics because the electrical characteristics are determined only by the first unit or the second unit. In contrast, the polymer of the present specification has an advantage in that the electrical characteristics can be finely adjusted by adjusting both units by including all of the first unit and the second unit having different electrical characteristics. Accordingly, the polymer according to one exemplary embodiment of the present specification includes all of the first unit and the second unit different from each other to exhibit an effect of improving hole mobility, as compared to a case where only the first unit or the second unit is included, and thus, an effect of improving efficiency and service life of an organic light emitting device to which the polymer is applied may be obtained.

In this specification, when one member (layer) is provided "on" another member (layer), this includes not only a case where one member (layer) is in contact with another member but also a case where another member (layer) exists between two members (layers).

In this specification, when a component "comprises" a constituent element, unless specifically described otherwise, this is not intended to exclude the other constituent element, but it is intended that the other constituent element may also be included.

In the present specification, "mole fraction" means the ratio of the number of moles of a given component to the total number of moles of all components.

In this specification, an "adjacent" group may mean a substituent substituted for an atom directly connected to an atom substituted with a corresponding substituent, a substituent disposed spatially closest to the corresponding substituent, or another substituent substituted for an atom substituted with a corresponding substituent. For example, two substituents substituted on ortho positions in the benzene ring and two substituents substituted for the same carbon in the aliphatic ring may be interpreted as groups "adjacent" to each other.

In the present specification, in a ring formed by bonding adjacent groups, "ring" means a substituted or unsubstituted hydrocarbon ring; or a substituted or unsubstituted heterocycle.

Unless defined otherwise herein, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although methods and materials similar or equivalent to those described herein can be used in practice or testing of exemplary embodiments of the present invention, suitable methods and materials are described below. All publications, patents, and other references mentioned in this specification are herein incorporated by reference in their entirety and in the event of a conflict, the present specification, including definitions, will control unless a specific paragraph is mentioned. In addition, the materials, methods, and examples are illustrative only and not intended to be limiting.

Examples of the substituents in the present specification will be described below, but are not limited thereto.

In the present specification, "-" means a moiety attached to another substituent or bonding moiety.

In this specification, "×" is the point of attachment in a polymer.

The term "substituted" means that a hydrogen atom bonded to a carbon atom of a compound becomes an additional substituent, and the position to be substituted is not limited as long as the position is a position where the hydrogen atom is substituted (i.e., a position where a substituent may be substituted), and when two or more are substituted, two or more substituents may be the same as or different from each other.

In the present specification, the term "substituted or unsubstituted" means substituted with one or two or more substituents selected from the group consisting of: deuterium; a halogen group; an alkyl group; cycloalkyl; an alkoxy group; an aryloxy group; an amine group; an aryl group; a heterocyclic group; and a crosslinkable group, substituted with a substituent connected with two or more of the exemplified substituents, or having no substituent. For example, a "substituent in which two or more substituents are linked" may be a biphenyl group. That is, biphenyl may also be aryl, and may be interpreted as a substituent to which two phenyl groups are linked.

Examples of the substituents will be described below, but are not limited thereto.

In the present specification, examples of the halogen group include fluorine (F), chlorine (Cl), bromine (Br), or iodine (I).

In the present specification, the alkyl group may be linear or branched, and the number of carbon atoms thereof is not particularly limited, but is preferably 1 to 60. According to one exemplary embodiment, the alkyl group has a carbon number of 1 to 30. Specific examples of the alkyl group include, but are not limited to, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, pentyl, hexyl, heptyl, octyl, and the like.

In the present specification, alkylene means a group having two bonding positions in an aryl group, that is, a divalent group. The above description of alkyl groups can be applied to alkylene groups, except that the alkylene groups are divalent.

In the present specification, the number of carbon atoms of the cycloalkyl group is not particularly limited, but is preferably 3 to 60. According to one exemplary embodiment, the cycloalkyl group has a carbon number of 3 to 30. Specific examples of cycloalkyl groups include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, and the like.

In the present specification, the alkoxy group may be linear, branched or cyclic. The number of carbon atoms of the alkoxy group is not particularly limited, but is preferably 1 to 30. Specific examples of the alkoxy group may be methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, tert-butoxy, sec-butoxy, n-pentoxy, neopentoxy, isopentoxy, n-hexoxy, 3-dimethylbutoxy, 2-ethylbutoxy, n-octoxy, n-nonoxy, n-decyloxy and the like, but are not limited thereto.

In the present specification, the amine group may be selected from the group consisting of-NH ₂ The method comprises the steps of carrying out a first treatment on the surface of the An alkylamino group; an arylalkylamine group; an arylamine group; aryl heteroaryl amino; alkyl heteroaryl amine groups; and heteroaryl amine groups, and is not limited thereto. The number of carbon atoms of the amine group is not particularly limited, but is preferably 1 to 60.

In the present specification, the number of carbon atoms of the aryl group is not particularly limited, but is preferably 6 to 60. According to one exemplary embodiment, the aryl group has 6 to 30 carbon atoms. In one exemplary embodiment of the present specification, the aryl group may be a monocyclic aryl group or a polycyclic aryl group. Specific examples of the monocyclic aryl group include phenyl, biphenyl, terphenyl, and the like, but are not limited thereto. Examples of polycyclic aryl groups include naphthyl, anthryl, phenanthryl, pyrenyl,Radical, triphenylene radical,>a radical, a fluorenyl radical, etc., but is not limited thereto.

In the present specification, arylene means that there are two bonding positions, i.e., divalent groups, in the aryl group. The above description of aryl groups can be applied to arylene groups, except that each arylene group is a divalent group.

In the present specification, examples of the arylamine group include a substituted or unsubstituted monoarylamine group, a substituted or unsubstituted diarylamino group, or a substituted or unsubstituted triarylamine group. The aryl group in the arylamine group may be a monocyclic aryl group or a polycyclic aryl group. Arylamine groups containing two or more aryl groups may include monocyclic aryl groups, polycyclic aryl groups, or both monocyclic and polycyclic aryl groups. For example, the aryl group in the arylamine group may be selected from the above examples of aryl groups. The number of carbon atoms of the arylamine group is not particularly limited, but is preferably 6 to 60.

In the present specification, a heterocyclic group is an aromatic group, an aliphatic group, or a condensed ring group of an aromatic group and an aliphatic group containing one or more atoms other than carbon, that is, one or more hetero atoms. In particular, the heteroatom may include 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 may be 2 to 60. Examples of heterocyclyl groups include thienyl, furyl, pyrrolyl, imidazolyl, thiazolyl,Azolyl, (-) -and (II) radicals>Diazolyl, pyridyl, bipyridyl, pyrimidinyl, triazinyl, triazolyl, acridinyl, pyridazinyl, pyrazinyl, quinolinyl, quinazolinyl quinoxalinyl, phthalazinyl, pyridopyrimidinyl, pyridopyrazinyl, pyrazinopyrazinyl, isoquinolinyl, indolyl, carbazolyl, benzoOxazolyl, benzimidazolyl, benzothiazolyl, benzocarbazolyl, benzothienyl, dibenzothiophenyl, benzofuranyl, phenanthridinyl, phenanthroline, iso ∈ ->Oxazolyl, thiadiazolyl, phenothiazinyl, dibenzofuranyl, and the like, but are not limited thereto.

In this specification, heteroaryl is an aromatic cyclic group containing one or more heteroatoms. The number of carbon atoms of the heteroaryl group is not particularly limited, but may be 2 to 60. Examples of heteroaryl groups include, but are not limited to, pyridyl, pyrrolyl, pyrimidinyl, pyridazinyl, furyl, thienyl, benzothienyl, benzofuryl, dibenzothienyl, dibenzofuranyl, carbazolyl, and the like.

In the present specification, aryloxy is represented by-OR ₂₀₀ A group represented by, and R ₂₀₀ Is aryl. The aryl group in the aryloxy group is the same as the above-described examples of the aryl group. Specific examples of the aryloxy group include phenoxy, benzyloxy, p-methylbenzyloxy, p-tolyloxy, m-tolyloxy, 3, 5-dimethyl-phenoxy, 2,4, 6-trimethylphenoxy, p-t-butylphenoxy, 3-biphenyloxy, 4-biphenyloxy, 1-naphthoxy, 2-naphthoxy, 4-methyl-1-naphthoxy, 5-methyl-2-naphthoxy, 1-anthracenoxy, 2-anthracenoxy, 9-anthracenoxy, 1-phenanthrenoxy, 3-phenanthrenoxy, 9-phenanthrenoxy and the like, but are not limited thereto.

In the present specification, silyl groups are represented by-SiR ₂₀₁ R ₂₀₂ R ₂₀₃ A group represented by, and R ₂₀₁ 、R ₂₀₂ And R is ₂₀₃ Identical or different from each other, and eachIndependently hydrogen; deuterium; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group. Examples of the silyl group include, but are not limited to, trimethylsilyl group, triethylsilyl group, t-butyldimethylsilyl group, vinyldimethylsilyl group, propyldimethylsilyl group, triphenylsilyl group, diphenylsilyl group, phenylsilyl group, and the like.

In the present specification, the siloxane group is a group consisting of-Si (R ₂₀₄ ) ₂ OSi(R ₂₀₅ ) ₃ A group represented by, and R ₂₀₄ And R is ₂₀₅ Are the same or different from each other and are each independently hydrogen; deuterium; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group.

In the present specification, the hydrocarbon ring group may be an aromatic ring, an aliphatic ring, or a ring in which an aromatic ring and an aliphatic ring are condensed.

In the present specification, the above description on aryl groups can be applied to aromatic rings.

In the present specification, the above description on cycloalkyl groups can be applied to aliphatic rings.

In this specification, a combination of substituents means a substituent in which two or more substituents among the exemplified substituents are connected. For example, in hydrogen, deuterium, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, crosslinkable groups, or combinations thereof, 'combination' means a substituent in which two or more of the exemplified substituents are linked. As an example, the combination may have a structure in which an alkyl group and a crosslinkable group are connected, or a structure in which an alkyl group and an aryl group are connected, but is not limited thereto.

In this specification, a crosslinkable group may mean a reactive substituent that crosslinks a compound by exposure to heat, light, and/or radiation. Crosslinking may occur when radicals generated by decomposition of the carbon-carbon multiple bond and the cyclic structure are connected to each other by heat treatment, light irradiation, and/or radiation irradiation.

In this specification, a crosslinkable group is any one of the following structures.

In the case of the construction described above, in which the first and second support members are arranged,

l30 to L36 are the same or different from each other and are each independently a direct bond; -O-; -COO-; a substituted or unsubstituted alkylene group; a substituted or unsubstituted arylene group; or a combination thereof, and

- - - - - - - -, is a moiety bonded to chemical formula 3.

Hereinafter, the first unit and the second unit will be described.

In one exemplary embodiment of the present specification, the first unit and the second unit are units having two connection points.

In one exemplary embodiment of the present specification, both the first unit and the second unit are represented by chemical formula 1, but are different from each other.

In one exemplary embodiment of the present description, L1 is a direct bond; or a substituted or unsubstituted arylene group having 6 to 30 carbon atoms.

In one exemplary embodiment of the present description, L1 is a direct bond; a substituted or unsubstituted phenylene group; or a substituted or unsubstituted naphthylene group.

In one exemplary embodiment of the present description, L2 is a substituted or unsubstituted arylene group having 6 to 30 carbon atoms.

In one exemplary embodiment of the present description, L2 is a substituted or unsubstituted phenylene group; or a substituted or unsubstituted naphthylene group.

In one exemplary embodiment of the present specification, chemical formula 1 is represented by any one of the following chemical formulas 1-1 to 1-4.

[ chemical formula 1-1]

[ chemical formulas 1-2]

[ chemical formulas 1-3]

[ chemical formulas 1-4]

In chemical formulas 1-1 to 1-4,

r1, R2, R10, R11, ar1, ar2, L3, L4, n1 and n2 are the same as those defined in chemical formula 1,

r3 to R9 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group,

n3 to n6 are each an integer of 1 to 4, and when n3 to n6 are each 2 or more, substituents in brackets are the same or different from each other,

n7 to n9 are each an integer of 1 to 6, and when n7 to n9 are each 2 or more, substituents in brackets are the same or different from each other, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, chemical formula 1 is represented by any one of the following chemical formulas 1-11 to 1-18.

[ chemical formulas 1-11]

[ chemical formulas 1-12]

[ chemical formulas 1-13]

[ chemical formulas 1-14]

[ chemical formulas 1-15]

[ chemical formulas 1-16]

[ chemical formulas 1-17]

[ chemical formulas 1-18]

In chemical formulas 1-11 to 1-18,

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, L3 and L4 are the same or different from each other and are each independently a substituted or unsubstituted arylene group.

In one exemplary embodiment of the present specification, L3 and L4 are the same or different from each other and are each independently a substituted or unsubstituted arylene group having 6 to 30 carbon atoms.

In one exemplary embodiment of the present specification, L3 and L4 are the same or different from each other and are each independently a substituted or unsubstituted phenylene group; substituted or unsubstituted biphenylene; or a substituted or unsubstituted naphthylene group.

In one exemplary embodiment of the present specification, ar1 and Ar2 are the same or different from each other and are substituted or unsubstituted arylene groups having 6 to 30 carbon atoms.

In one exemplary embodiment of the present specification, ar1 and Ar2 are the same or different from each other and are each independently a substituted or unsubstituted phenylene group; substituted or unsubstituted biphenylene; or a substituted or unsubstituted naphthylene group.

In one exemplary embodiment of the present specification, chemical formula 1 is represented by any one of the following chemical formulas 1-5 to 1-8.

[ chemical formulas 1-5]

[ chemical formulas 1-6]

[ chemical formulas 1-7]

[ chemical formulas 1-8]

In chemical formulas 1-5 to 1-8,

r1, R2, R10, R11, n1 and n2 are the same as those defined in chemical formula 1,

R3 to R9, R20 to R27, and R30 to R37 are the same or different from each other, and are each independently hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group,

n3 to n6, n20 to n27, and n30 to n37 are each integers of 1 to 4, n7 to n9 are each integers of 1 to 6, and when n3 to n9, n20 to n27, and n30 to n37 are each 2 or more, substituents in brackets are the same or different from each other,

p1 to p4 are each integers of 1 to 3, and when p1 to p4 are each 2 or more, the structures in brackets are the same or different from each other, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, chemical formula 1 is represented by any one of the following chemical formulas 1-21 to 1-28.

[ chemical formulas 1-21]

[ chemical formulas 1-22]

[ chemical formulas 1-23]

[ chemical formulas 1-24]

[ chemical formulas 1-25]

[ chemical formulas 1-26]

[ chemical formulas 1-27]

[ chemical formulas 1-28]

In chemical formulas 1-21 to 1-28,

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, p1 to p4 are each 1 or 2.

In one exemplary embodiment of the present description, p1 and p2 are 2.

In one exemplary embodiment of the present description, p3 and p4 are 1 or 2.

In one exemplary embodiment of the present specification, R10 and R11 are the same or different from each other and are each independently a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms; a substituted or unsubstituted arylamine group having 6 to 60 carbon atoms; substituted or unsubstituted aryl groups having 6 to 30 carbon atoms; or a substituted or unsubstituted heterocyclic group having 2 to 30 carbon atoms.

In one exemplary embodiment of the present specification, R10 and R11 are the same or different from each other and are each independently a substituted or unsubstituted arylamine group; or a substituted or unsubstituted aryl group.

In one exemplary embodiment of the present specification, R10 and R11 are the same or different from each other and are each independently an arylamine group; or an unsubstituted or alkyl-substituted aryl group.

In one exemplary embodiment of the present specification, R10 and R11 are the same or different from each other and are each independently an arylamine group; unsubstituted or alkyl-substituted phenyl; unsubstituted or alkyl-substituted biphenyl; or unsubstituted or alkyl-substituted naphthyl.

In one exemplary embodiment of the present specification, R10 and R11 are the same or different from each other and are each independently an arylamine group; or unsubstituted or alkyl-substituted phenyl.

In one exemplary embodiment of the present specification, chemical formula 1 is the following chemical formula 1-a or 1-B.

[ chemical formula 1-A ]

[ chemical formula 1-B ]

In chemical formulas 1-a and 1-B,

l1 to L4, ar1, ar2, R1, R2, n1 and n2 are the same as those defined in chemical formula 1,

Rz1 and Rz2 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group,

rz3 to Rz6 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted aryl group,

rz1 and rz2 are integers of 1 to 5, and when each of rz1 and rz2 is 2 or more, the substituents in brackets are the same or different from each other, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present description, at least one of Rz3 and Rz4 and at least one of Rz5 and Rz6 are substituted or unsubstituted aryl groups.

In one exemplary embodiment of the present specification, rz3 to Rz6 are the same or different from each other and are each independently a substituted or unsubstituted aryl group.

In one exemplary embodiment of the present specification, chemical formula 1 is the following chemical formula 1-A-1 or 1-B-1.

[ chemical formula 1-A-1]

[ chemical formula 1-B-1]

In the chemical formulas 1-A-1 and 1-B-1,

l1 to L4, R1, R2, ar1, ar2, n1 and n2 are the same as those defined in chemical formula 1,

rp1 and Rq1 are the same or different from each other and are each independently a substituted or unsubstituted alkyl group,

rp2 to Rp4 and Rq2 to Rq4 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group,

rp2 and rq2 are each an integer of 1 to 4, rp3, rp4, rq3 and rq4 are each an integer of 1 to 5, and when rp2, rp3, rp4, rq2, rq3 and rq4 are each 2 or more, the substituents in brackets are the same or different from each other, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, at least one of the first unit and the second unit is chemical formula 1-a-1.

In one exemplary embodiment of the present specification, chemical formula 1 is the following chemical formula 1-A1.

[ chemical formula 1-A1]

In the chemical formula 1-A1,

rx1 to Rx3 and Ry1 to Ry3 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group,

at least one of Rx1 to Rx3 and at least one of Ry1 to Ry3 is a substituted or unsubstituted alkyl group, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, at least one of the first unit and the second unit is chemical formula 1-A1.

In one exemplary embodiment of the present specification, rx1 to Rx3 and Ry1 to Ry3 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, and at least one of Rx1 to Rx3 and at least one of Ry1 to Ry3 is a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms.

In one exemplary embodiment of the present specification, rx1 to Rx3 and Ry1 to Ry3 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, and at least one of Rx1 to Rx3 and at least one of Ry1 to Ry3 is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms.

In one exemplary embodiment of the present specification, rx1 to Rx3 and Ry1 to Ry3 are the same or different from each other and are each independently hydrogen; deuterium; a linear alkyl group having 1 to 10 carbon atoms; or a branched alkyl group having 4 to 10 carbon atoms, and at least one of Rx1 to Rx3 and at least one of Ry1 to Ry3 is a linear alkyl group having 1 to 10 carbon atoms; or branched alkyl groups having 4 to 10 carbon atoms.

In one exemplary embodiment of the present specification, rx1 to Rx3 and Ry1 to Ry3 are the same or different from each other and are each independently hydrogen; deuterium; a methyl group; an ethyl group; a propyl group; n-butyl; sec-butyl; an isobutyl group; or tert-butyl, and at least one of Rx1 to Rx3 and at least one of Ry1 to Ry3 is methyl; an ethyl group; a propyl group; n-butyl; sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, at least one of Rx1 to Rx3 and at least one of Ry1 to Ry3 are methyl groups; sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, at least one of Rx1 to Rx3 and at least one of Ry1 to Ry3 are sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, rx2 and Ry2 are the same or different from each other and are each independently a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms.

In one exemplary embodiment of the present specification, rx2 and Ry2 are the same or different from each other and are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms.

In one exemplary embodiment of the present specification, rx2 and Ry2 are the same or different from each other and are each independently a substituted or unsubstituted straight chain alkyl group having 1 to 30 carbon atoms or a substituted or unsubstituted branched chain alkyl group having 4 to 30 carbon atoms.

In one exemplary embodiment of the present specification, rx2 and Ry2 are the same or different from each other and are each independently a substituted or unsubstituted straight chain alkyl group having 1 to 10 carbon atoms or a substituted or unsubstituted branched chain alkyl group having 4 to 10 carbon atoms.

In one exemplary embodiment of the present specification, rx2 and Ry2 are the same or different from each other and are each independently a straight chain alkyl group having 1 to 10 carbon atoms or a branched chain alkyl group having 4 to 10 carbon atoms.

In one exemplary embodiment of the present description, rx2 and Ry2 are the same or different from each other and are each independently substituted or unsubstituted branched alkyl groups having 4 to 30 carbon atoms.

In one exemplary embodiment of the present specification, rx2 and Ry2 are the same or different from each other and are each independently hydrogen; deuterium; a methyl group; an ethyl group; a propyl group; n-butyl; sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, rx2 and Ry2 are the same or different from each other and are each independently methyl; an ethyl group; a propyl group; n-butyl; sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, rx2 and Ry2 are the same or different from each other and are each independently methyl; sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, rx2 and Ry2 are the same or different from each other and are each independently sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, L1 of chemical formula 1-A1 is a direct bond, and L2 is a substituted or unsubstituted phenylene group.

In one exemplary embodiment of the present specification, chemical formula 1-a is any one of the following chemical formulas 1-A2 to 1-A4.

[ chemical formula 1-A2]

[ chemical formula 1-A3]

[ chemical formula 1-A4]

In the chemical formulas 1-A2 to 1-A4,

l3, L4, ar1 and Ar2 are the same as those defined in chemical formula 1,

r1 to R3, rx1, rx3, ry1 and Ry3 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group,

n1 to n3 are each an integer of 1 to 4, and when n1 to n3 are each 2 or more, substituents in brackets are the same or different from each other, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, at least one of the first unit and the second unit is chemical formula 1-A2, 1-A3, or 1-A4.

In one exemplary embodiment of the present specification, chemical formula 1 is any one of the following chemical formulas 1-a-11 to 1-a-14 and 1-B-11 to 1-B-14.

[ chemical formula 1-A-11]

[ chemical formula 1-A-12]

[ chemical formula 1-A-13]

[ chemical formula 1-A-14]

[ chemical formula 1-B-11]

[ chemical formula 1-B-12]

/>

[ chemical formula 1-B-13]

[ chemical formula 1-B-14]

In the chemical formulas 1-A-11 to 1-A-14 and 1-B-11 to 1-B-14,

r1, R2, n1 and n2 are the same as those defined in chemical formula 1,

rx4 to Rx6, ry4 to Ry6, rp3, rp4, rq3 and Rq4 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group,

p1 to p4 are each integers of 1 to 3, and when p1 to p4 are each 2 or more, structures in brackets are the same as or different from each other,

rp3, rp4, rq3 and rq4 are each integers of 1 to 5, and when rp3, rp4, rq3 and rq4 are each 2 or more, the substituents in brackets are the same or different from each other, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, the first unit and the second unit are different from each other, and each is any one of chemical formulas 1-a-11 to 1-a-14 and 1-B-11 to 1-B-14.

In one exemplary embodiment of the present specification, at least one of the first unit and the second unit is chemical formula 1-a-11.

In one exemplary embodiment of the present specification, R20 to R27 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; or a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present specification, R20 to R27 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms.

In one exemplary embodiment of the present specification, R20 to R27 are the same or different from each other and are each independently hydrogen or deuterium.

In one exemplary embodiment of the present specification, R30 to R37 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; or a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present specification, R30 to R37 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms.

In one exemplary embodiment of the present specification, R30 to R37 are the same or different from each other and are each independently hydrogen or deuterium.

In one exemplary embodiment of the present specification, rx4 to Rx6 and Ry4 to Ry6 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms.

In one exemplary embodiment of the present specification, rx4 to Rx6 and Ry4 to Ry6 are the same or different from each other and are each independently hydrogen; deuterium; a substituted or unsubstituted straight chain alkyl group having 1 to 30 carbon atoms; or a substituted or unsubstituted branched alkyl group having 4 to 30 carbon atoms.

In one exemplary embodiment of the present specification, at least one of Rx4 to Rx6 and at least one of Ry4 to Ry6 is a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms.

In one exemplary embodiment of the present specification, rx4 to Rx6 and Ry4 to Ry6 are the same or different from each other and are each independently hydrogen; deuterium; a linear alkyl group having 1 to 30 carbon atoms; or branched alkyl groups having 4 to 30 carbon atoms.

In one exemplary embodiment of the present specification, rx4 to Rx6 and Ry4 to Ry6 are the same or different from each other and are each independently hydrogen; deuterium; a linear alkyl group having 1 to 10 carbon atoms; or branched alkyl groups having 4 to 10 carbon atoms.

In one exemplary embodiment of the present specification, at least one of Rx4 to Rx6 and at least one of Ry4 to Ry6 is a linear alkyl group having 1 to 10 carbon atoms; or branched alkyl groups having 4 to 10 carbon atoms.

In one exemplary embodiment of the present specification, at least one of Rx4 to Rx6 and at least one of Ry4 to Ry6 is a branched alkyl group having 4 to 10 carbon atoms.

In one exemplary embodiment of the present specification, any one of Rx4 to Rx6 and any one of Ry4 to Ry6 is a linear alkyl group having 1 to 30 carbon atoms; or branched alkyl groups having 4 to 30 carbon atoms.

In one exemplary embodiment of the present specification, any of Rx4 to Rx6 and any of Ry4 to Ry6 are branched alkyl groups having 4 to 30 carbon atoms.

In one exemplary embodiment of the present specification, rx4 to Rx6 and Ry4 to Ry6 are the same or different from each other and are each independently hydrogen; deuterium; a methyl group; an ethyl group; a propyl group; n-butyl; sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, at least one of Rx4 to Rx6 and at least one of Ry4 to Ry6 are methyl groups; sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, at least one of Rx4 to Rx6 and at least one of Ry4 to Ry6 are sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, rx5 and Ry5 are the same or different from each other and are each independently an alkyl group having 1 to 30 carbon atoms.

In one exemplary embodiment of the present specification, rx5 and Ry5 are the same or different from each other and are each independently branched alkyl groups having 4 to 30 carbon atoms.

In one exemplary embodiment of the present specification, rx5 and Ry5 are the same or different from each other and are each independently methyl; sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, rx5 and Ry5 are the same or different from each other and are each independently sec-butyl; an isobutyl group; or tert-butyl.

In one exemplary embodiment of the present specification, rp3, rp4, rq3 and Rq4 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; or a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present specification, rp3, rp4, rq3 and Rq4 are the same or different from each other and are each independently hydrogen or deuterium.

In one exemplary embodiment of the present specification, at least one of R1 to R3 is a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present specification, one of R1 to R3 is a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present specification, two of R1 to R3 are substituted or unsubstituted alkyl groups.

In one exemplary embodiment of the present specification, R1 to R3 are all substituted or unsubstituted alkyl groups.

In one exemplary embodiment of the present specification, at least one of R1, R2, R4, and R5 is a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present specification, one of R1, R2, R4 and R5 is a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present description, two of R1, R2, R4, and R5 are substituted or unsubstituted alkyl groups.

In one exemplary embodiment of the present description, R1, R2, R4, and R5 are all substituted or unsubstituted alkyl groups.

In one exemplary embodiment of the present specification, at least one of R1, R2, R6 and R7 is a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present description, one of R1, R2, R6 and R7 is a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present description, two of R1, R2, R6 and R7 are substituted or unsubstituted alkyl groups.

In one exemplary embodiment of the present description, R1, R2, R6 and R7 are all substituted or unsubstituted alkyl groups.

In one exemplary embodiment of the present specification, at least one of R1, R2, R8 and R9 is a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present description, one of R1, R2, R8 and R9 is a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present description, two of R1, R2, R8 and R9 are substituted or unsubstituted alkyl groups.

In one exemplary embodiment of the present description, R1, R2, R8 and R9 are all substituted or unsubstituted alkyl groups.

In one exemplary embodiment of the present specification, R1 to R9 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms.

In one exemplary embodiment of the present specification, at least one of R1, R2, R8, and R9 is an alkyl group.

In one exemplary embodiment of the present specification, at least one of R1, R2, R8 and R9 is an alkyl group having 1 to 10 carbon atoms.

In one exemplary embodiment of the present specification, R1 to R9 are the same or different from each other and are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, and at least one of R1 to R9 is an alkyl group having 1 to 10 carbon atoms.

In one exemplary embodiment of the present specification, chemical formula 1 is the following chemical formulas 1 to 31 or the following chemical formulas 1 to 32.

[ chemical formulas 1-31]

[ chemical formulas 1-32]

In chemical formulas 1 to 31 and 1 to 32,

r3, R3', R8 and R9 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, chemical formula 1 is chemical formulas 1 to 31 or chemical formulas 1 to 33 below.

[ chemical formulas 1-33]

In the chemical formulas 1 to 33,

r10, R11, ar1, ar2, L3 and L4 are the same as those defined in chemical formula 1,

r8 and R9 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, chemical formula 1 is the following chemical formulas 1 to 34 or the following chemical formulas 1 to 35.

[ chemical formulas 1-34]

[ chemical formulas 1-35]

In chemical formulas 1 to 34 and 1 to 35,

r3, R3', R8, R9, R20, R21, R26, R27, R30, R31, R36 and R37 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group,

n20, n21, n26, n27, n30, n31, n36 and n37 are each integers of 1 to 4, and when n20, n21, n26, n27, n30, n31, n36 and n37 are each 2 or more, substituents in brackets are the same or different from each other,

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, chemical formula 1 is chemical formulas 1 to 34 or chemical formulas 1 to 36 below.

[ chemical formulas 1-36]

In the chemical formulas 1 to 36,

r10 and R11 are the same as those defined in chemical formula 1,

r8, R9, R26, R27, R36 and R37 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group,

n26, n27, n36 and n37 are each integers of 1 to 4, and when n26, n27, n36 and n37 are each 2 or more, substituents in brackets are the same or different from each other,

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, R1, R2, R3', R8, and R9 are the same or different from each other and are each independently a substituted or unsubstituted alkyl group.

In one exemplary embodiment of the present specification, R1, R2, R3', R8 and R9 are the same or different from each other and are each independently a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms.

In one exemplary embodiment of the present specification, R1, R2, R3', R8 and R9 are the same or different from each other and are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms.

In one exemplary embodiment of the present specification, R1, R2, R3', R8 and R9 are the same or different from each other and are each independently a linear alkyl group having 1 to 30 carbon atoms.

In one exemplary embodiment of the present specification, R1, R2, R3', R8 and R9 are the same or different from each other and are each independently a substituted or unsubstituted straight chain alkyl group having 1 to 10 carbon atoms.

In one exemplary embodiment of the present specification, R1, R2, R3', R8 and R9 are the same or different from each other and are each independently methyl; a hexyl group; or octyl.

In one exemplary embodiment of the present specification, R1 and R2 are each methyl.

In one exemplary embodiment of the present specification, R3 and R3' are each hexyl or octyl.

In one exemplary embodiment of the present description, R8 and R9 are each hexyl or octyl.

In one exemplary embodiment of the present specification, the first unit and the second unit are different from each other, and each is any one of the following structures.

In the structure, are the points of attachment in the polymer.

In an exemplary embodiment of the present specification, hydrogen may be replaced with deuterium. For example, the hydrogen contained in the structure may be replaced with deuterium.

Hereinafter, the third unit will be described.

In one exemplary embodiment of the present specification, the third unit is a unit having 3 or 4 connection points.

In one exemplary embodiment of the present description, Y is a direct bond; or a substituted or unsubstituted arylene group.

In one exemplary embodiment of the present description, Y is a direct bond; or a substituted or unsubstituted phenylene group.

In one exemplary embodiment of the present specification, chemical formula 2 is any one of the following chemical formulas 2-1 to 2-4.

[ chemical formula 2-1]

[ chemical formula 2-2]

[ chemical formulas 2-3]

[ chemical formulas 2-4]

In chemical formulas 2-1 to 2-4,

z1 is CRa; siRa; n; or a substituted or unsubstituted trivalent aryl group,

z2 and Z3 are the same or different from each other and are each independently C; si; or a substituted or unsubstituted tetravalent aryl group,

l10 is a direct bond; or a substituted or unsubstituted arylene group,

r50 to R60 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; cyano group; an alkoxy group; an aryloxy group; a siloxane group; a substituted or unsubstituted amine group; a substituted or unsubstituted alkyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; or crosslinkable groups, and adjacent groups may be bonded to each other to form a ring,

r50 to r59 are each an integer of 1 to 4, r60 is an integer of 1 to 5, and when r50 to r60 are each 2 or more, substituents in brackets are the same or different from each other, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, formula 2 is formula 2-1.

In one exemplary embodiment of the present description, Z1 is CRa or SiRa, and when Ra is substituted or unsubstituted aryl, L10 is substituted or unsubstituted arylene.

In one exemplary embodiment of the present description, Z1 is CH; siH; n; or a substituted or unsubstituted trivalent aryl group.

In one exemplary embodiment of the present description, Z1 is CH; siH; n; or a substituted or unsubstituted trivalent phenyl group.

In one exemplary embodiment of the present description, Z1 is N; or trivalent phenyl.

In one exemplary embodiment of the present description, L10 is a direct bond; or a substituted or unsubstituted arylene group having 6 to 30 carbon atoms.

In one exemplary embodiment of the present description, L10 is a direct bond; or arylene having 6 to 30 carbon atoms.

In one exemplary embodiment of the present description, L10 is a direct bond; or phenylene.

In one exemplary embodiment of the present description, L10 is a direct bond.

In one exemplary embodiment of the present specification, formula 2 is formula 2-2.

In one exemplary embodiment of the present description, Z2 is C; or Si.

In one exemplary embodiment of the present specification, formula 2 is formulas 2-3.

In one exemplary embodiment of the present description, Z3 is C; or Si.

In one exemplary embodiment of the present specification, formula 2 is formulas 2-4.

In one exemplary embodiment of the present specification, chemical formula 2 is any one of the following structures.

/>

r50 to R60, R52' and R61 are the same as or different from each other and are each independently hydrogen; deuterium; a halogen group; cyano group; an alkoxy group; an aryloxy group; a fluoroalkoxy group; a siloxane group; a substituted or unsubstituted amine group; a substituted or unsubstituted alkyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; or crosslinkable groups, and adjacent groups may be bonded to each other to form a ring,

r50 to r59 and r52 'are each an integer of 1 to 4, r60 is an integer of 1 to 5, r6 is an integer of 1 to 3, and when r50 to r61 and r52' are each 2 or more, substituents in brackets are the same or different from each other, and

* Is the point of attachment in the polymer.

In an exemplary embodiment of the present specification, R50 to R61 and R52' are each hydrogen or deuterium.

Specifically, chemical formula 2 is any one of the following structures.

In the structure, are the points of attachment in the polymer.

More specifically, chemical formula 2 is any one of the following structures.

In the structure, are the points of attachment in the polymer.

More specifically, chemical formula 2 is any one of the following structures.

In the structure, are the points of attachment in the polymer.

Hereinafter, the end group will be described.

In one exemplary embodiment of the present description, E is a capping unit of the polymer.

In one exemplary embodiment of the present description, E is a unit having only one connection point.

In one exemplary embodiment of the present specification, E is a substituted or unsubstituted alkyl group; substituted or unsubstituted aryl; a crosslinkable group; or a combination thereof.

In one exemplary embodiment of the present specification, E is a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms; substituted or unsubstituted aryl groups having 6 to 30 carbon atoms; a crosslinkable group; or a combination thereof.

In one exemplary embodiment of the present specification, E is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms; a substituted or unsubstituted phenyl group; a substituted or unsubstituted biphenyl group; a crosslinkable group; or a combination thereof.

In one exemplary embodiment of the present specification, E is a crosslinkable group; or any of the following structures.

r70 to R72 are the same or different from each other and are each independently hydrogen; deuterium; a substituted or unsubstituted alkyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; or a crosslinkable group such as a hydroxyl group,

l70 is a direct bond; a substituted or unsubstituted alkylene group; or a substituted or unsubstituted arylene group,

i1 is an integer of 1 to 10, and when i1 is 2 or more, two or more L70 are the same or different from each other,

n70 and n72 are each an integer of 1 to 5, n71 is an integer of 1 to 4, and when n70 to n72 are each 2 or more, substituents in brackets are the same or different from each other, and

* Is the point of attachment in the polymer.

In one exemplary embodiment of the present specification, E is any one of the following structures.

r70 to R72, L70, i1, n70 to n72 and are as described above.

In one exemplary embodiment of the present specification, R70 to R72 are the same or different from each other and are each independently hydrogen; deuterium; an alkyl group having 1 to 10 carbon atoms; or crosslinkable groups.

In one exemplary embodiment of the present description, L70 is a direct bond; an alkylene group having 1 to 10 carbon atoms; or arylene having 6 to 30 carbon atoms.

In the structure, are the points of attachment in the polymer.

More specifically, E is any one of the following structures.

In the structure, are the points of attachment in the polymer.

Hereinafter, the polymer will be described.

In one exemplary embodiment of the present specification, the polymer is represented by the following chemical formula 4.

[ chemical formula 4]

E1-[A1] _a -[B1] _b -[C1] _c -E2

In the chemical formula 4, the chemical formula is shown in the drawing,

a1 is a first unit represented by chemical formula 1,

b1 is a second unit represented by chemical formula 1 and different from the first unit,

c1 is a third unit represented by chemical formula 2,

e1 and E2 are the same or different from each other and are each independently a terminal group represented by chemical formula 3,

a. b and c are each molar fractions, a is a real number of 0< a <1, b is a real number of 0< b <1, c is a real number of 0< c <1, and a+b+c is 1.

In one exemplary embodiment of the present specification, a, b and c are determined by the equivalent ratio of the monomers used in the preparation of the polymer.

In an exemplary embodiment of the present specification, a is a real number of 0.05 or more and less than 1.

In an exemplary embodiment of the present specification, a is a real number of 0.1 or more and less than 1.

In an exemplary embodiment of the present specification, a is a real number of 0.1 to 0.9.

In an exemplary embodiment of the present specification, a is a real number of 0.1 to 0.8.

In an exemplary embodiment of the present specification, a is a real number of 0.2 to 0.9.

In an exemplary embodiment of the present specification, a is a real number of 0.2 to 0.8.

In an exemplary embodiment of the present specification, b is a real number of 0.05 or more and less than 1.

In an exemplary embodiment of the present specification, b is a real number of 0.1 or more and less than 1.

In an exemplary embodiment of the present specification, b is a real number of 0.1 to 0.9.

In an exemplary embodiment of the present specification, b is a real number of 0.1 to 0.8.

In an exemplary embodiment of the present specification, b is a real number of 0.2 to 0.9.

In an exemplary embodiment of the present specification, b is a real number of 0.2 to 0.8.

In one exemplary embodiment of the present specification, c is a real number greater than 0 and less than 1.

In an exemplary embodiment of the present specification, c is a real number greater than 0 and 0.9 or less.

In an exemplary embodiment of the present specification, c is a real number of 0.1 to 0.8.

In one exemplary embodiment of the present specification, a is a real number of 0.05 or more and less than 1, b is a real number of 0.05 or more and less than 1, and c is a real number of more than 0 and 0.9 or less.

In one exemplary embodiment of the present specification, a is a real number of 0.1 to 0.8, b is a real number of 0.1 to 0.8, and c is a real number of 0.1 to 0.8.

In the present specification, a, B, and C are not based on the mole fraction of the entire polymer including E1 and E2 represented by chemical formula 1, but are based on the mole fraction of the sum of A1, B1, and C1.

In an exemplary embodiment of the present description, the molar ratio of (a1+b1+c1): (e1+e2) is from 40:60 to 98:2.

In one exemplary embodiment of the present description, the polymer is an alternating polymer, a block polymer, or a random polymer.

In one exemplary embodiment of the present specification, chemical formula 4 does not mean that A1, B1 and C1 are only in this order in the polymer. Specifically, A1, B1, and C1 may be in various orders in the polymer. For example, the polymers may be in the order E1-A1-B1-C1-E2, E1-A1-C1-B1-E2, E1-B1-A1-C1-E2, E1-B1-C1-A1-E2, E1-C1-A1-B1-E2 or E1-C1-B1-A1-E2.

Further, chemical formula 4 does not have a structure in which only each of A1, B1, and C1 is connected in a polymer. For example, the polymers may be linked in the polymer in various content ranges, such as E1-A1-B1-A1-C1-E2, E1-A1-C1-B1-C1-E2, and E1-A1-B1-C1-A1-E2. In this case, the content ranges of A1, B1 and C1 are determined by the equivalent ratio of the monomers used during the preparation of the polymer.

In one exemplary embodiment of the present description, the weight average molecular weight (Mw) of the polymer is from 10,000g/mol to 3,000,000g/mol. Specifically, the weight average molecular weight (Mw) of the polymer is from 10,000g/mol to 1,000,000g/mol. More specifically, the weight average molecular weight (Mw) of the polymer is from 10,000g/mol to 300,000g/mol.

In one exemplary embodiment of the present description, the number average molecular weight (Mw) of the polymer is from 5,000g/mol to 3,000,000g/mol. Specifically, the weight average molecular weight (Mw) of the polymer is from 5,000g/mol to 1,000,000g/mol. More specifically, the weight average molecular weight (Mw) of the polymer is from 10,000g/mol to 300,000g/mol.

The molecular weight can be measured as a relative value with respect to a standard Polystyrene (PS) sample by Gel Permeation Chromatography (GPC) using Tetrahydrofuran (THF) as an eluent, and specifically, a value obtained by applying a polystyrene-converted weight average molecular weight (Mw) and number average molecular weight (Mw) obtained via gel permeation chromatography (GPC, PLgel HFIPGEL, agilent Technologies).

Specifically, the polymer to be measured was dissolved in tetrahydrofuran to a concentration of 1%, 10 μl of the resulting solution was injected into GPC and flowed at a flow rate of 0.3 mL/min, and the sample was analyzed at 30 ℃ for a sample concentration of 2.0mg/mL (100 μl injection). Here, two PLgel HFIPGEL manufactured by Waters as columns were connected in series, and the polymer was measured at 40 ℃ using RI detector (product manufactured by Agilent Waters, 2414) as detector, and then the data could be processed using ChemStation.

When the weight average molecular weight of the polymer satisfies the above range, the viscosity is suitable for exhibiting an effect of facilitating the manufacture of an inkjet device and the manufacture of an organic light emitting device using fine pixels.

In one exemplary embodiment of the present description, the polymer has a polydispersity index (PDI) of 1 to 10. Specifically, the molecular weight of the polymer is 1 to 8.

In one exemplary embodiment of the present specification, the first unit represented by chemical formula 1, the second unit represented by chemical formula 1 and different from the first unit, the third unit represented by chemical formula 2, and the end group represented by chemical formula 3 in the polymer may be distributed such that the characteristics of the polymer are optimized.

In one exemplary embodiment of the present specification, when the mole fraction of the first unit represented by chemical formula 1, the mole fraction of the second unit represented by chemical formula 1 and different from the first unit, the mole fraction of the third unit represented by chemical formula 2, and the mole fraction of the end group represented by chemical formula 3 in the polymer are defined as a1, b1, c1, and e1, respectively, a1, b1, c1, and e1 are each real numbers, 0< a1<1, 0< b1<1, 0< c1<1, and 0< e1<1, and a1+b1+c1+e1=1.

In one exemplary embodiment of the present specification, a1, b1, c1 and e1 are each real numbers, 0< a1<1, 0< b1<1, 0< c1<1, and 0< e1<1, and a1+b1+c1+e1=1.

In an exemplary embodiment of the present specification, a1 is a real number of 0.05 or more and less than 1.

In an exemplary embodiment of the present specification, a1 is a real number of 0.05 to 0.95.

In one exemplary embodiment of the present specification, a1 is a real number of 0.1 to 0.9.

In an exemplary embodiment of the present specification, a1 is a real number of 0.05 to 0.8.

In one exemplary embodiment of the present specification, a1 is a real number of 0.1 to 0.8.

In an exemplary embodiment of the present specification, b1 is a real number of 0.05 or more and less than 1.

In an exemplary embodiment of the present specification, b1 is a real number of 0.05 to 0.95.

In one exemplary embodiment of the present specification, b1 is a real number of 0.1 to 0.9.

In an exemplary embodiment of the present specification, b1 is a real number of 0.05 to 0.8.

In one exemplary embodiment of the present specification, b1 is a real number of 0.1 to 0.8.

In one exemplary embodiment of the present specification, c1 is a real number of 0 or more and less than 1.

In an exemplary embodiment of the present specification, c1 is a real number of 0.05 or more and less than 1.

In one exemplary embodiment of the present specification, c1 is a real number of 0.1 to 0.9.

In one exemplary embodiment of the present specification, c1 is a real number of 0.1 to 0.8.

In an exemplary embodiment of the present specification, e1 is a real number of 0.05 or more and less than 1.

In an exemplary embodiment of the present specification, e1 is a real number of 0.05 to 0.95.

In one exemplary embodiment of the present specification, e1 is a real number of 0.1 to 0.9.

In an exemplary embodiment of the present specification, e1 is a real number of 0.05 to 0.8.

In one exemplary embodiment of the present specification, e1 is a real number of 0.1 to 0.8.

In one exemplary embodiment of the present specification, a1 is a real number of 0.05 or more and less than 1, b1 is a real number of 0.05 or more and less than 1, c1 is a real number of 0.05 to 0.9, e1 is a real number of 0.05 to 0.95, and a1+b1+c1+e1=1.

In one exemplary embodiment of the present specification, a1 is a real number of 0.05 to 0.8, b1 is a real number of 0.05 to 0.8, c1 is a real number of 0.1 to 0.8, e1 is a real number of 0.05 to 0.8, and a1+b1+c1+e1=1.

In one exemplary embodiment of the present specification, the polymer is any one of the following structures.

/>

In the structure, a1 is a real number of 0< a1<1, b1 is a real number of 0< b1<1, c1 is a real number of 0< c1<1, e1 is a real number of 0< e1<1, and a1+b1+c1+e1 is 1.

Specifically, a1 is a real number of 0.05 or more and less than 1, b1 is a real number of 0.05 or more and less than 1, c1 is a real number of 0.05 to 0.9, e1 is a real number of 0.05 to 0.9, and a1+b1+c1+e1=1.

In the structure, a1, b1, c1 and e1 are determined by the equivalent weight of the monomers added during the preparation of the polymer.

In one exemplary embodiment of the present specification, the polymer may be prepared by using well-known polymerization techniques. For example, a production method such as Suzuki, yamamoto, stille, a c—n coupling reaction using a metal catalyst, and an arylation reaction using a metal catalyst can be applied.

In one exemplary embodiment of the present specification, the polymer may be substituted with deuterium. In this case, deuterium may be substituted by applying a method using a precursor material. For example, deuterium can be substituted by treating non-deuterated monomers and/or polymers with deuterated solvents in the presence of lewis acid H/D exchange catalysts.

In one exemplary embodiment of the present specification, the molecular weight of the polymer may be controlled by adjusting the ratio of the monomers used. Furthermore, in some exemplary embodiments, the molecular weight of the polymer may be controlled by using a quenching reaction.

In one exemplary embodiment of the present specification, the polymer may be used as a hole transport material. For example, the polymer may be a 'polymer for transporting holes'.

In one exemplary embodiment of the present specification, the polymer may be formed into a layer by a solution method. The term 'layer' is used interchangeably with the term 'film' or 'film' and refers to a coating that covers a desired area. The term is not limited by size. The area may be as large as the entire device, as small as a specific functional area, such as an actual visual display, or as small as a single subpixel.

In one exemplary embodiment of the present description, the layers, films and films may be formed by any typical deposition technique, including deposition, liquid deposition (continuous and discontinuous techniques), and thermal transfer. Continuous deposition techniques include, but are not limited to, spin coating, gravure coating, curtain coating, dip coating, slot die coating, spray coating, and continuous nozzle coating. Discontinuous deposition techniques include, but are not limited to, inkjet printing, gravure printing, and screen printing.

In one exemplary embodiment of the present disclosure, the intrinsic viscosity of the polymer is less than 20cP. This is particularly useful for inkjet printing applications, and the lower viscosity may allow inkjet printing to spray more viscous liquids. In particular, the intrinsic viscosity of the polymer is less than 15cP, more particularly less than 10cP, and more particularly less than 8cP.

In one exemplary embodiment of the present description, the intrinsic viscosity of the polymer is 1cP or greater and less than 20cP, specifically 1cP to 10cP, and more specifically 1cP to 8cP.

Intrinsic viscosity is a value measured at 25℃using a Ubbelohde viscometer (Ubbelohde viscometer) after dissolving a polymer to be measured in a chloroform solvent at a concentration of 0.5 g/dl.

Hereinafter, a coating composition including the polymer will be described.

An exemplary embodiment of the present specification provides a coating composition comprising the above polymer.

In an exemplary embodiment of the present specification, the coating composition further comprises a solvent. In one exemplary embodiment of the present specification, the coating composition includes a polymer and a solvent.

In one exemplary embodiment of the present specification, the coating composition may be in a liquid phase. By "liquid phase" is meant that the composition is in a liquid state at room temperature at atmospheric pressure.

In one exemplary embodiment of the present specification, it is preferable that the solvent does not dissolve the material applied to the lower layer.

In one exemplary embodiment of the present specification, when the coating composition is applied to the organic material layer of the organic light emitting device, a solvent that does not dissolve the material in the lower layer is used. For example, when the coating composition is applied to the hole transport layer, a solvent that does not dissolve the material in the lower layer (first electrode, hole injection layer, or the like) is used. Therefore, there is an advantage in that the hole transport layer can be introduced by a solution method.

In one exemplary embodiment of the present specification, the coating composition has improved solvent resistance during heat treatment after coating.

For example, even if the coating composition is prepared by using a solvent that dissolves the polymer, and the layer is manufactured by a solution method, the layer may have resistance to the same solvent after the heat treatment.

Therefore, when the organic material layer is formed by using a polymer and then subjected to a heat treatment process, a solution method may be performed while applying an additional organic material layer.

In one exemplary embodiment of the present specification, examples of the solvent included in the coating composition include: chlorine-based solvents such as chloroform, methylene chloride, 1, 2-dichloroethane, 1, 2-trichloroethane, chlorobenzene, and o-dichlorobenzene; ether-based solvents, e.g. tetrahydrofuran and diAn alkane; solvents based on aromatic hydrocarbons, such as toluene, xylene, trimethylbenzene, and mesitylene; ketone-based solvents such as acetone, methyl ethyl ketone, and cyclohexanone; ester-based solvents such as ethyl acetate, butyl acetate, and ethyl cellosolve acetate; polyhydric alcohols such as ethylene glycol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether, dimethoxyethane, propylene glycol, diethoxymethane, triethylene glycol monoethyl ether, glycerol, and 1, 2-hexanediol and derivatives thereof; alcohol-based solvents such as methanol, ethanol, propanol, isopropanol, and cyclohexanol; sulfoxide-based solvents, such as dimethyl sulfoxide; amide-based solvents such as N-methyl-2-pyrrolidone and N, N-dimethylformamide; benzoate-based solvents such as methyl benzoate, butyl benzoate, and 3-phenoxybenzoate; and a solvent such as tetralin, but the solvent may be used as long as it can dissolve or disperse the polymer according to one exemplary embodiment of the present specification, and is not limited thereto.

In an exemplary embodiment of the present specification, the solvent may be used alone or as a mixture of two or more solvents.

In an exemplary embodiment of the present specification, the boiling point of the solvent is preferably 40 to 350 ℃, and more preferably 80 to 330 ℃, but is not limited thereto.

In one exemplary embodiment of the present specification, the concentration of the polymer in the coating composition is preferably 0.1 to 20% by weight/volume, and more preferably 0.5 to 10% by weight/volume, but is not limited thereto.

In one exemplary embodiment of the present description, the remaining components of the coating composition other than the polymer are solvents.

Hereinafter, an organic light emitting device including the polymer will be described.

An exemplary embodiment of the present specification provides an organic light emitting device, including: a first electrode; a second electrode; and an organic material layer disposed between the first electrode and the second electrode, comprising one or more layers, wherein one or more of the organic material layers comprises the polymer.

The organic material layer of the organic light emitting device of the present specification may also be constituted of a single layer structure, but may be constituted of a multilayer structure in which two or more organic material layers are stacked. For example, the organic light emitting device of the present invention may have a structure including a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injection layer, a layer that simultaneously injects and transports holes, a layer that simultaneously injects and transports electrons, and the like as the organic material layer. However, the structure of the organic light emitting device is not limited thereto, and may include a smaller number of organic layers.

When the organic light emitting device includes a plurality of organic material layers, the organic material layers may be formed of the same material or different materials.

In one exemplary embodiment of the present specification, an organic light emitting device includes: a first electrode; a second electrode; and a light emitting layer disposed between the first electrode and the second electrode, and further comprising an organic material layer having a single layer between the light emitting layer and the first electrode, wherein the organic material layer comprises the polymer.

In one exemplary embodiment of the present specification, an organic light emitting device includes: a first electrode; a second electrode; and a light emitting layer between the first electrode and the second electrode, and further comprising an organic material layer having a plurality of layers between the light emitting layer and the first electrode, wherein one or more of the organic material layers comprises the polymer.

In one exemplary embodiment of the present specification, the organic material layer including a polymer is a hole injection layer, a hole transport layer, or a layer that simultaneously injects and transports holes.

In one exemplary embodiment of the present specification, an organic light emitting device includes: a first electrode; a second electrode; and a light emitting layer disposed between the first electrode and the second electrode, and further comprising one or more of a hole injection layer, a hole transport layer, and an electron blocking layer between the light emitting layer and the first electrode, wherein one or more of the hole injection layer, the hole transport layer, and the electron blocking layer comprises the polymer.

In one exemplary embodiment of the present specification, an organic light emitting device includes: a first electrode; a second electrode; and a light emitting layer disposed between the first electrode and the second electrode, and including a hole injection layer and a hole transport layer between the first electrode and the light emitting layer, and one or more of the hole injection layer and the hole transport layer contains the polymer.

In one exemplary embodiment of the present specification, the organic light emitting device has a structure that: wherein the first electrode, the hole injection layer, the hole transport layer, the light emitting layer, and the second electrode are sequentially disposed, and one or more of the hole injection layer and the hole transport layer contains the polymer.

In one exemplary embodiment of the present specification, the organic light emitting device has a structure that: wherein the first electrode, the hole injection layer, the hole transport layer, the light emitting layer, and the second electrode are sequentially stacked, and the hole injection layer or the hole transport layer contains the polymer.

In one exemplary embodiment of the present specification, the organic light emitting device has a structure that: wherein the first electrode, the hole injection layer, the hole transport layer, the light emitting layer, and the second electrode are sequentially stacked, and the hole transport layer contains the polymer.

In an exemplary embodiment of the present specification, an additional organic material layer may be further included between the light emitting layer and the second electrode.

In one exemplary embodiment of the present specification, an organic material layer having a single layer may be further included between the light emitting layer and the second electrode.

In one exemplary embodiment of the present specification, an organic material layer having a plurality of layers may be further included between the light emitting layer and the second electrode. For example, one or more of a hole blocking layer, an electron injection layer, an electron transport layer, and a layer that simultaneously injects and transports electrons may be further included between the light emitting layer and the second electrode.

In one exemplary embodiment of the present specification, the organic light emitting device has a structure that: wherein the first electrode, the hole injection layer, the hole transport layer, the light emitting layer, the electron injection and transport layer, and the second electrode are sequentially stacked, and one or more layers of the hole injection layer and the hole transport layer contain the polymer.

In one exemplary embodiment of the present specification, the organic light emitting device has a structure that: wherein the first electrode, the hole injection layer, the hole transport layer, the light emitting layer, the electron injection and transport layer, and the second electrode are sequentially stacked, and the hole injection layer or the hole transport layer contains the polymer.

In one exemplary embodiment of the present specification, the organic light emitting device has a structure that: wherein the first electrode, the hole injection layer, the hole transport layer, the light emitting layer, the electron injection and transport layer, and the second electrode are sequentially stacked, and the hole transport layer contains the polymer.

The structure of an organic light emitting device according to an exemplary embodiment of the present specification is illustrated in fig. 1 and 2.

Fig. 1 illustrates a structure of an organic light emitting device in which a substrate 1, an anode 2, a light emitting layer 3, and a cathode 4 are sequentially stacked.

Fig. 2 illustrates a structure of an organic light emitting device in which a substrate 1, an anode 2, a hole injection layer 5, a hole transport layer 6, a light emitting layer 3, an electron injection and transport layer 7, and a cathode 4 are sequentially stacked.

Fig. 1 and 2 illustrate an organic light emitting device, and the structure of the organic light emitting device of the present invention is not limited thereto.

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

In still another exemplary embodiment, the organic light emitting device may be a normal organic light emitting device in which an anode, an organic material layer having one or more layers, and a cathode are sequentially stacked on a substrate.

In still another exemplary embodiment, the organic light emitting device may be an inverted organic light emitting device in which a cathode, an organic material layer having one or more layers, and an anode are sequentially stacked on a substrate.

The organic light emitting device of the present invention may be stacked as a structure in the following example.

(1) Anode/hole transport layer/light emitting layer/cathode

(2) Anode/hole injection layer/hole transport layer/light emitting layer/cathode

(3) Anode/hole injection layer/hole buffer layer/hole transport layer/light emitting layer/cathode

(4) Anode/hole transport layer/light emitting layer/electron transport layer/cathode

(5) Anode/hole transport layer/light emitting layer/electron transport layer/electron injection layer/cathode

(6) Anode/hole injection layer/hole transport layer/light emitting layer/electron transport layer/cathode

(7) Anode/hole injection layer/hole transport layer/light emitting layer/electron transport layer/electron injection layer/cathode

(8) Anode/hole injection layer/hole buffer layer/hole transport layer/light emitting layer/electron transport layer/cathode

(9) Anode/hole injection layer/hole buffer layer/hole transport layer/light emitting layer/electron transport layer/electron injection layer/cathode

(10) Anode/hole transport layer/electron suppression layer/light emitting layer/electron transport layer/cathode

(11) Anode/hole transport layer/electron suppression layer/light emitting layer/electron transport layer/electron injection layer/cathode

(12) Anode/hole injection layer/hole transport layer/electron suppression layer/light emitting layer/electron transport layer/cathode

(13) Anode/hole injection layer/hole transport layer/electron suppression layer/light emitting layer/electron transport layer/electron injection layer/cathode

(14) Anode/hole transport layer/light emitting layer/hole suppressing layer/electron transport layer/cathode

(15) Anode/hole transport layer/light emitting layer/hole suppressing layer/electron transport layer/electron injection layer/cathode

(16) Anode/hole injection layer/hole transport layer/light emitting layer/hole suppressing layer/electron transport layer/cathode

(17) Anode/hole injection layer/hole transport layer/light emitting layer/hole suppressing layer/electron transport layer/electron injection layer/cathode

(18) Anode/hole injection layer/hole transport layer/electron suppression layer/light emitting layer/hole blocking layer/electron injection layer/transport layer/cathode

In the structure, the "electron transport layer/electron injection layer" may be replaced with "electron injection and transport layer" or "layer that simultaneously injects and transports electrons".

For example, the organic light emitting device of the present invention may be stacked in a structure such as "anode/hole injection layer/hole transport layer/light emitting layer/electron injection and transport layer/cathode", wherein the electron transport layer/electron injection layer of (7) is replaced with an electron injection and transport layer.

In the structure, "hole injection layer/hole transport layer" may be replaced with "hole injection and transport layer" or "layer that simultaneously injects and transports holes".

The organic light emitting device of the present specification may be manufactured by materials and methods known in the art, except that one or more of the organic material layers are manufactured to contain the polymer. In particular, for an organic light emitting device, one or more of the organic material layers may be formed by using a coating composition including the polymer.

For example, the organic light emitting device of the present specification may be manufactured by sequentially stacking an anode, an organic material layer, and a cathode on a substrate. In this case, the organic light emitting device may be manufactured by: an anode is formed by depositing a metal or a metal oxide having conductivity or an alloy thereof on a substrate using a Physical Vapor Deposition (PVD) method (e.g., sputtering or electron beam evaporation), forming an organic material layer including a hole injection layer, a hole transport layer, a light emitting layer, and an electron injection and transport layer on the anode, and then depositing a material that can function as a cathode on the organic material layer. In addition to the above-described method, the organic light emitting device may be manufactured by sequentially depositing a cathode material, an organic material layer, and an anode material on a substrate.

The present specification also provides a method for manufacturing an organic light emitting device formed by using the coating composition.

Specifically, in one exemplary embodiment of the present specification, the method includes: preparing a substrate; forming a first electrode on a substrate; forming an organic material layer having one or more layers on the first electrode; and forming a second electrode on the organic material layers, and one or more of the organic material layers are formed by using the coating composition.

In one exemplary embodiment of the present specification, the organic material layer formed by using the coating composition is formed by using spin coating.

In another exemplary embodiment, the organic material layer formed by using the coating composition is formed by a printing method.

In still another exemplary embodiment of the present specification, examples of the printing method include inkjet printing, nozzle printing, offset printing, transfer printing, screen printing, or the like, but are not limited thereto.

The coating composition according to one exemplary embodiment of the present specification is suitable for a solution process due to its structural characteristics such that the organic material layer can be formed by a printing process, and thus, has economic benefits in terms of time and cost in manufacturing a device.

In one exemplary embodiment of the present specification, the forming of the organic material layer formed by using the coating composition includes: coating the first electrode with a coating composition; and heat-treating or light-treating the applied coating composition.

In another exemplary embodiment, the heat treatment time in the heat treatment of the coating composition may be within 1 hour. The heat treatment time may be specifically within 30 minutes.

In one exemplary embodiment of the present specification, the atmosphere for heat-treating the organic layer formed by using the coating composition is preferably an inert gas atmosphere, such as argon or nitrogen.

When the organic material layer formed by using the coating composition is formed by a method including heat treatment or light treatment of the coated coating composition, the solvent resistance is improved, so that a plurality of layers can be formed by repeating the solution deposition and crosslinking methods, and the stability is increased, so that the service life characteristics of the device can be improved.

In one exemplary embodiment of the present specification, the layers other than the organic material layer formed using the coating composition are formed by spin coating, printing, or deposition process. For example, when the coating composition is applied to the hole injection layer or the hole transport layer, the hole injection layer or the hole transport layer is formed by spin coating, and the additional organic material layer may be formed by spin coating, a printing method, or a deposition process. In addition, the upper layer disposed in contact with the organic material layer formed using the coating composition may be formed by spin coating. As one example, when the coating composition is applied to the hole transport layer, the hole transport layer is formed by spin coating, the light emitting layer formed on the hole transport layer so as to be in contact with the hole transport layer is formed by spin coating, and the electron injection and transport layer formed on the light emitting layer may be formed by a deposition process.

In one exemplary embodiment of the present specification, as the anode material, a material having a high work function is generally preferable to promote hole injection into the organic material layer. 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; metal oxides such as zinc oxide, indium Tin Oxide (ITO), and Indium Zinc Oxide (IZO); combinations of metals and oxides, e.g. ZnO, al or SnO ₂ Sb; conductive polymers, e.g. poly (3-methylthiophene), poly [3,4- (ethylene-1, 2-dioxy) thiophene](PEDOT), polypyrrole and polyaniline; etc., but is not limited thereto.

In one exemplary embodiment of the present specification, as the cathode material, a material having a low work function is generally preferable to promote electron injection into the organic material layer. 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 alloys thereof; multilayer structural materials, e.g. LiF/Al or LiO ₂ Al; etc., but is not limited thereto.

In one exemplary embodiment of the present specification, the hole injection layer is a layer that injects holes from an electrode, and the hole injection material is preferably a compound of: which has a capability of transporting holes and thus has an excellent effect of injecting holes into a light emitting layer or a light emitting material, prevents excitons generated by the light emitting layer from moving to an electron injection layer or an electron injection material, and also has an excellent capability of forming a thin film. In addition, the Highest Occupied Molecular Orbital (HOMO) of the hole injection material is preferably a value between the work function of the anode material and the HOMO of the adjacent organic material layer. Specific examples of the hole injection material include metalloporphyrin, oligothiophene, arylamine-based organic material, hexanitrile hexaazabenzophenanthrene-based organic material, quinacridone-based organic material, and aryl amine-based organic material But not limited to, carbazole-based organic materials, anthraquinone, polyaniline-based and polythiophene-based conductive polymers, and the like. Specifically, the hole injection layer may be a carbazole-based compound, an arylamine-based compound, or a compound in which a substituted or unsubstituted carbazole and an arylamine group are connected, but is not limited thereto.

In one exemplary embodiment of the present specification, the hole transporting layer is a layer that receives holes from a hole injecting layer and transports the holes to a light emitting layer, and the hole transporting material is suitably a material having high hole mobility, which can receive holes from an anode or a hole injecting layer and transfer the holes to a light emitting layer. In one exemplary embodiment of the present specification, the hole transport layer comprises the polymer.

In one exemplary embodiment of the present specification, the light emitting layer includes an organic compound. The organic compound is a material that can receive holes and electrons from the hole transport layer and the electron transport layer, respectively, and combine the holes and electrons to emit light in the visible light region, and is preferably a material having good quantum efficiency for fluorescence or phosphorescence. Specific examples thereof include: 8-hydroxyquinoline aluminum complex (Alq) ₃ ) The method comprises the steps of carrying out a first treatment on the surface of the Carbazole-based compounds; a dimeric styryl compound; BAlq; 10-hydroxybenzoquinoline-metal compounds; based on benzoOxazole, benzothiazole-based and benzimidazole-based compounds; poly (p-phenylene vinylene) (PPV) based polymers; a spiro compound; polyfluorene; rubrene, etc., but is not limited thereto.

In one exemplary embodiment of the present specification, the light emitting layer may include a host material and a dopant material. Examples of the host material include fused aromatic ring derivatives or heterocyclic ring-containing compounds and the like. Examples of the condensed aromatic ring derivative include, for example, anthracene derivatives, pyrene derivatives, naphthalene derivatives, pentacene derivatives, phenanthrene compounds, fluoranthene compounds, and the like, and examples of the heterocyclic ring-containing compound include carbazole derivativesThe substance, dibenzofuran derivative, ladder-type furan compound, pyrimidine derivative, etc., but examples thereof are not limited thereto. Examples of dopant materials include aromatic amine derivatives, styrylamine compounds, boron complexes, boron-containing compounds, fluoranthene compounds, metal complexes, and the like. Specifically, the aromatic amine derivative is a condensed aromatic ring derivative substituted with a substituted or unsubstituted arylamino group, and examples thereof include arylamino-substituted fluorenes, benzofluorenes, pyrenes, anthracenes, Bisindenopyrene, etc., and a styrylamine compound is a compound in which a substituted or unsubstituted arylamine is substituted with at least one arylvinyl group, and one or two or more substituents selected from aryl, silyl, alkyl, cycloalkyl, and arylamino groups are substituted or unsubstituted. Specifically, examples of the styrylamine compound include styrylamine, styrylenediamine, styrenetriamine, styrenetetramine, and the like, but are not limited thereto. Further, examples of the metal complex include iridium complex, platinum complex, and the like, but are not limited thereto.

In one exemplary embodiment of the present description, the host material is an anthracene derivative, and the dopant material is an arylamino-substituted benzofluorene-based compound, or a boron-containing compound. Specifically, the host material may be an unsubstituted or deuterium-substituted anthracene derivative, and the dopant material may be a bis (diarylamino) benzofluorene-based compound or a boron-containing compound, but is not limited thereto.

In one exemplary embodiment of the present specification, the light emitting layer includes quantum dots. For example, the light emitting layer may include a matrix resin and quantum dots, and as the type and content of the quantum dots, those known in the art may be used.

The case where the light emitting layer contains quantum dots exhibits a lower HOMO level than the case where the light emitting layer contains an organic compound, so that the common layer also needs to exhibit a low HOMO level. Since the compound according to one exemplary embodiment of the present specification exhibits a low HOMO level by including a halogen group, quantum dots may be introduced into the light emitting layer.

In one exemplary embodiment of the present specification, the common layer is a hole injection layer, a hole transport layer, a layer that simultaneously injects and transports holes, an electron injection layer, an electron transport layer, or a layer that simultaneously injects and transports electrons.

In one exemplary embodiment of the present specification, the electron transporting layer is a layer that accepts electrons and transports electrons to the light emitting layer, and the electron transporting material is suitably a material having high electron mobility that can skillfully accept electrons from the cathode and transfer electrons to the light emitting layer. Specific examples thereof include: al complex of 8-hydroxyquinoline containing Alq ₃ But not limited to, complexes of (c) and (d), organic radical compounds, hydroxyflavone-metal complexes, and the like. The electron transport layer may be used with any desired cathode material as used according to the related art. In particular, suitable examples of cathode materials are typical materials having a low work function followed by an aluminum layer or a silver layer. Specific examples thereof include cesium, barium, calcium, ytterbium, and samarium, in each case followed by an aluminum layer or a silver layer.

In one exemplary embodiment of the present specification, the electron injection layer is a layer injecting electrons from an electrode, and the electron injection material is preferably a compound: it has an ability to transport electrons, has an excellent effect of injecting electrons into a light emitting layer or a light emitting material, prevents excitons generated by the light emitting layer from moving to a hole injecting layer, and is also excellent in the ability to form a thin film. Specific examples thereof include fluorenone, anthraquinone dimethane, diphenoquinone, thiopyran dioxide,Azole,/->Diazole, triazole, imidazole, < >>Tetracarboxylic acid, fluorenylidene methyl esterAlkanes, anthrone, bathocuproine (BCP) and the like, and derivatives thereof, metal complex compounds, nitrogen-containing 5-membered ring derivatives and the like, but are not limited thereto.

In one exemplary embodiment of the present specification, examples of the metal complex compound include lithium 8-hydroxyquinoline, zinc bis (8-hydroxyquinoline), copper bis (8-hydroxyquinoline), manganese bis (8-hydroxyquinoline), aluminum tris (2-methyl-8-hydroxyquinoline), gallium tris (8-hydroxyquinoline), beryllium bis (10-hydroxybenzo [ h ] quinoline), zinc bis (10-hydroxybenzo [ h ] quinoline), gallium bis (2-methyl-8-quinoline) chloride, gallium bis (2-methyl-8-quinoline) (o-cresol), gallium bis (2-methyl-8-quinoline) (1-naphthol) aluminum, gallium bis (2-methyl-8-quinoline) (2-naphthol) and the like, but are not limited thereto.

In one exemplary embodiment of the present specification, the hole blocking layer is a layer that blocks holes from reaching the cathode, and may be generally formed under the same conditions as those of the hole injection layer. Specific examples thereof includeThe diazole derivative or triazole derivative, phenanthroline derivative, BCP, aluminum complex, and the like, but is not limited thereto.

In one exemplary embodiment of the present specification, a layer (e.g., a bank layer) adjacent to an organic material layer including the polymer represented by chemical formula 1 or the polymer including the unit represented by chemical formula 2 and the end group represented by chemical formula 5 includes a compound having fluorine as a substituent.

For example, when the polymer represented by chemical formula 1 is included in the hole transport layer, one or more of the bank layer, the hole injection layer, and the light emitting layer adjacent to the hole transport layer includes fluorine.

As described above, when the layer adjacent to the organic material layer including the polymer (which includes the first unit, the second unit, the third unit, and the terminal group) includes fluorine, there is an effect that a uniform layer can be formed because the dipole moment is changed according to fluorine.

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

EMBODIMENTS FOR CARRYING OUT THE INVENTION

Hereinafter, the present specification will be described in detail with reference to examples for specifically describing the present specification. However, the embodiments according to the present specification may be modified in various forms and should not be construed as limiting the scope of the present application to the embodiments described in detail below. The embodiments of the present application are provided to more fully explain the present description to one of ordinary skill in the art.

Synthesis example 1 preparation of monomers

(1) Preparation of monomer A-2

In a round-bottomed flask equipped with a condenser, 10.00g (1.00 eq.) of monomer A-1, 14g (2.00 eq.) of bis (pinacolato) diboron and 1.60g (3.00 eq.) of potassium tert-butoxide were dissolved in 200mL of toluene. When the solution was completely dissolved, 0.20g (0.04 equivalent) of [1,1' -bis (diphenylphosphino) ferrocene ] dichloropalladium (II) (Pd (dppf)) was introduced thereinto, and then the resultant mixture was refluxed at 90℃for 8 hours. After the reaction was terminated with deionized water, the organic solvent was extracted with ethyl acetate and distilled water, and monomer a-2 was obtained in 99.4% purity by column chromatography.

(2) Preparation of monomer B-2

Monomer B-2 was prepared in the same manner as in (1) of Synthesis example 1, except that monomer B-1 was used instead of monomer A-1 in (1) of Synthesis example 1.

(3) Preparation of monomer C-2

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Monomer C-2 was prepared in the same manner as in (1) of Synthesis example 1, except that monomer C-1 was used instead of monomer A-1 in (1) of Synthesis example 1.

(4) Preparation of monomer D-2

Monomer D-2 was prepared in the same manner as in (1) of Synthesis example 1, except that monomer D-1 was used instead of monomer A-1 in (1) of Synthesis example 1.

Synthesis example 2 preparation of Polymer 1

After placing monomer A-2 (0.382 mmol), monomer B-2 (0.382 mmol), monomer X-1 (0.158 mmol) and monomer Y-1 (0.369 mmol) into a round bottom flask and dissolving in toluene (11 mL), tetra (triphenylphosphine) palladium (0) (Pd (PPh) ₃ ) ₄ ) (0.05 mmol), 5mL of 2M potassium carbonate (K) ₂ CO ₃ ) The solution, and 0.1mL of phase transfer catalyst Aliquat336, and then the resulting mixture was refluxed at 100 ℃ for 12 hours. The reaction was terminated by slowly dropping the reaction product into methanol, and then the mixture was stirred for 45 minutes, and the resulting solid was filtered. The dried solid was dissolved in toluene (1% w/v) and purified by passing it through a column containing silica gel and basic alumina (6 g each). Polymer 1 (5.2 g) was prepared by trituration of the toluene solution obtained with acetone.

Synthesis example 3 preparation of Polymer 2

Polymer 2 was produced in the same manner as in Synthesis example 2, except that monomer C-2 was used instead of monomer A-2 in Synthesis example 2.

Synthesis example 4 preparation of Polymer 3

Polymer 3 was produced in the same manner as in Synthesis example 2, except that monomer D-2 was used in place of monomer B-2 in Synthesis example 2.

Synthesis example 5 preparation of Polymer 4

Polymer 4 was produced in the same manner as in Synthesis example 2, except that monomer C-2 and monomer D-2 were used in place of monomer A-2 and monomer B-2, respectively, in Synthesis example 2.

Synthesis example 6 preparation of Polymer 5

Polymer 5 was produced in the same manner as in Synthesis example 2, except that monomer D-2 was used in place of monomer A-2 in Synthesis example 2.

Synthesis example 7 preparation of Polymer 6

Monomer A-1 (0.26 mmol), monomer C-1 (0.20 mmol), monomer X-2 (0.24 mmol), aliquat 336 (0.041 mmol), 1.24mL of aqueous potassium carbonate (0.5M), bis (di-tert-butyl (4-dimethylaminophenyl) phosphine) dichloropalladium (II) (0.013 mmol) and toluene (6.0 mL) were added to a scintillation vial equipped with a magnetic stir bar under inert gas. The tube was sealed with a screw cap with a septum, inserted into an aluminum block and heated to an external temperature of 105 ℃ over a period of 30 minutes, and the mixture was stirred at that temperature for 5 hours under reflux. Subsequently, monomer Y-2 (0.3 mmol) and toluene (1 mL) were added thereto. The reaction product was heated for an additional 1.5 hours and cooled to room temperature. The aqueous layer was removed and the water layer was removed, And the organic layer was washed twice with 20mL of deionized water each. The toluene layer was dried by passing it through 10g of silica gel and the silica was rinsed with toluene. The solvent was removed to obtain 250mg of product. By passing toluene solution through alumina, silica gel andto further purify the product. After concentration, the solvent-wet product was diluted with toluene to about 14mL, and then added to ethyl acetate (150 mL) to obtain a copolymer. The product toluene solution was reprecipitated in 3-pentanone to prepare polymer 6. (yield: 70%)

Synthesis example 8 preparation of Polymer 7

Monomer C-1 (0.3 mmol), monomer B-1 (0.2 mmol), monomer X-3 (0.2 mmol), and monomer Y-3 (0.3 mmol) were added to a scintillation vial and dissolved in toluene (10 mL) to prepare a first solution.

A50 mL Schlenk tube was charged with bis (1, 5-cyclooctadiene) nickel (0) (2.1 mmol). 2,2 '-bipyridine (2.1 mmol) and 1, 5-cyclooctadiene (2.1 mmol) were weighed into a scintillation vial and dissolved in N, N' -dimethylformamide (5.5 mL) and toluene (11 mL) to prepare a second solution.

The second solution was placed in a Schlenk tube and stirred at 50 ℃ for 30 minutes. The first solution was added to the Schlenk tube and the resulting solution was stirred at 50 ℃ for 180 minutes. Subsequently, the Schlenk tube was cooled to room temperature and then poured into HCl/methanol (5% v/v, concentrated HCl). After stirring for 45 minutes, the polymer was collected by vacuum filtration and dried under high vacuum. The polymer was dissolved in toluene (1% w/v) and passed through a column containing basic alumina (6 g) layered on silica gel (6 g). The polymer/toluene filtrate was concentrated (2.5% w/v toluene) and triturated with 3-pentanone. The toluene/3-pentanone solution was separated from the semi-solid polymer gradient, dissolved in toluene (15 mL), and then poured into stirred methanol to prepare polymer 7. (yield: 60%)

Synthesis example 9 preparation of Polymer 8

Polymer 8 was prepared in the same manner as in Synthesis example 7, except that monomer E-1, monomer A-2, monomer X-4 and monomer Y-1 were used in place of monomer A-1, monomer C-1, monomer X-2 and monomer Y-2, respectively, in Synthesis example 7. (yield: 55%)

Synthesis example 10 preparation of Polymer 9

Polymer 9 was produced in the same manner as in Synthesis example 7, except that monomer F-1, monomer B-1 and monomer Y-4 were used in place of monomer A-1, monomer C-1 and monomer Y-2, respectively, in Synthesis example 7. (yield: 60%)

Synthesis example 11 preparation of Polymer 10

Polymer 10 was produced in the same manner as in Synthesis example 7, except that monomer B-2, monomer G-2, monomer X-5 and monomer Y-5 were used in place of monomer A-1, monomer C-1, monomer X-2 and monomer Y-2, respectively, in Synthesis example 7. (yield: 60%)

Synthesis example 12 preparation of Polymer 11

Polymer 11 was produced in the same manner as in Synthesis example 8, except that monomer B-3, monomer F-1, monomer X-1 and monomer Y-2 were used in place of monomer C-1, monomer B-1, monomer X-3 and monomer Y-3, respectively, in Synthesis example 8. (yield: 60%)

Synthesis example 13 preparation of Polymer 12

Polymer 12 was produced in the same manner as in Synthesis example 7, except that monomer A-3 and monomer Y-1 were used in place of monomer C-1 and monomer Y-2, respectively, in Synthesis example 7. (yield: 50%)

Synthesis example 14 preparation of Polymer 13

Polymer 13 was produced in the same manner as in Synthesis example 8, except that monomer A-4, monomer X-1 and monomer Y-6 were used in place of monomer C-1, monomer X-3 and monomer Y-3, respectively, in Synthesis example 8. (yield: 60%)

Synthesis example 15 preparation of Polymer 14

Polymer 14 was produced in the same manner as in Synthesis example 8, except that monomer A-1, monomer C-1, monomer X-1 and monomer Y-1 were used in place of monomer C-1, monomer B-1, monomer X-3 and monomer Y-3, respectively, in Synthesis example 8. (yield: 70%)

Comparative Synthesis example 1 preparation of comparative Polymer Q1

Polymer Q1 was prepared in the same manner as in Synthesis example 2, except that the monomer B-2 in Synthesis example 2 was not used to prepare the polymer.

Comparative Synthesis example 2 preparation of comparative Polymer Q2

Polymer Q2 was prepared in the same manner as in Synthesis example 2, except that the monomer A-2 in Synthesis example 2 was not used to prepare the polymer.

Comparative Synthesis example 3 preparation of comparative Polymer Q3

Polymer Q3 was prepared in the same manner as in comparative Synthesis example 1 except that monomer Y-4 was used in place of monomer Y-1 in comparative Synthesis example 1.

Comparative Synthesis example 4 preparation of comparative Polymer Q4

Polymer Q4 was prepared in the same manner as in Synthesis example 8, except that monomer F-1, monomer X-4 and monomer Y-2 were used in place of monomer B-1, monomer X-3 and monomer Y-3, respectively, and that monomer C-1 in Synthesis example 8 was not used.

< example 1> measurement of molecular weight

Polymers 1 to 14 and comparative polymers Q1 to Q4 were synthesized as determined by molecular weight measurement.

Example 1-1.

The number average molecular weight (Mn), weight average molecular weight (Mw) and polydispersity index (PDI) of the polymer 1 prepared in Synthesis example 2 were measured using Tetrahydrofuran (THF) and GPC (PLgel HFIPGEL column manufactured by Agilent).

The polydispersity index is calculated by the following equation (1).

Equation (1): PDI = weight average molecular weight (Mw)/number average molecular weight (Mn)

Examples 1-2 to 1-14.

In examples 1-2 to 1-4, the number average molecular weight (Mn), the weight average molecular weight (Mw) and the polydispersity index (PDI) were measured in the same manner as in example 1-1, except that the polymer in Table 1 below was used instead of the polymer 1 in example 1-1.

Comparative examples 1-1 and 1-2

In comparative examples 1-1 and 1-2, the number average molecular weight (Mn), the weight average molecular weight (Mw) and the polydispersity index (PDI) were measured in the same manner as in example 1-1, except that the polymer in Table 2 below was used instead of the polymer 1 in example 1-1.

TABLE 1

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TABLE 2

< example 2> manufacture of organic light-emitting device

Example 2-1.

Thin coating with a thickness ofThe glass substrate of Indium Tin Oxide (ITO) was put into distilled water in which a cleaning agent was dissolved, and subjected to ultrasonic washing. In this case, a product manufactured by Fischer co. Was used as a cleaner, and distilled water filtered twice using a filter manufactured by Millipore co. Was used as distilled water. After washing the ITO for 30 minutes, ultrasonic washing was repeated twice using distilled water for 10 minutes. After the washing with distilled water was completed, the substrate was ultrasonically washed with isopropyl alcohol and acetone solvent and dried, and then the substrate was cleaned for 5 minutes and then dried.

Just prior to device fabrication, the washed and patterned ITO was treated with UV ozone for 10 minutes. After the ozone treatment, a 2 wt% cyclohexanone solution containing the compound a and the following compound B in a weight ratio of 8:2 was spin-coated on the ITO surface, and the solvent was removed by heat treatment, thereby forming a hole injection layer having a thickness of about 40 nm. A toluene solution in which 1.5 wt% of the polymer 1 prepared in synthesis example 2 was dissolved was spin-coated on the hole injection layer formed above, and the solvent was removed by heat treatment, thereby forming a hole transport layer having a thickness of about 100 nm. A methyl benzoate solution in which the following compound C and compound D (compound C: compound d=93:7 (wt%) were dissolved at a concentration of 2.0 wt%) was spin-coated on the hole transport layer, thereby forming a light-emitting layer having a thickness of about 100 nm. Thereafter, the ITO was transferred to a vacuum deposition apparatus, and then BCP was vacuum deposited to a thickness of 35nm on the light emitting layer, thereby forming an electron injection and transport layer. LiF and aluminum were sequentially deposited to a thickness of 1nm and 100nm, respectively, on the electron injection and transport layer, thereby forming a cathode.

During the preceding steps, the deposition rates of lithium fluoride and aluminum of the cathode are maintained at respectively Andand the vacuum degree during deposition is maintained at 2×10 ^-7 To 5X 10 ^-6 And (5) a bracket. />

Examples 2-2 to 2-5.

In examples 2-2 to 2-5, an organic light emitting device was manufactured in the same manner as in example 2-1, except that the polymer of the following table 3 was used instead of the polymer 1 in example 2-1.

Comparative examples 2-1 and 2-2.

In comparative examples 2-1 and 2-2, an organic light emitting device was manufactured in the same manner as in example 2-1, except that the polymer of the following table 3 was used instead of the polymer 1 in example 2-1.

Shown in Table 3 below at 10mA/cm ² Is of (a)Results of measuring the properties of the organic light emitting devices manufactured in examples 2-1 to 2-5 and comparative examples 2-1 and 2-2 at the flow density.

TABLE 3

In Table 3, unless otherwise indicated, the measured values are those at 1000 nits, and V is at 10mA/cm ² The external Quantum Efficiency (QE) is obtained as (number of emitted photons)/(number of injected charge carriers), cd/a (CE) is current efficiency, lm/W is light source efficiency, CIEx and CIEy are x and y coordinates according to a c.i. e chromaticity diagram (international commission on illumination (Commission Internationalede L' Eclairage), 1931), and CE/CIEy is a value obtained by dividing the light emission efficiency (cd/a) by the color coordinate (y) value.

From table 3, it can be confirmed that the organic light emitting devices (examples 2-1 to 2-5) to which the polymer according to the present invention was applied exhibited high efficiency as compared with the organic light emitting devices (comparative examples 2-1 and 2-2) to which the other polymer was applied. This is because the charge/hole transfer balance is adjusted by including the first unit and the second unit having different charge mobilities in the polymer of the present invention.

Examples 2 to 6.

Depositing ITO film thereonThe glass substrate of the thickness of (2) was ultrasonically cleaned with an acetone solvent for 10 minutes. Then, the glass substrate was put into distilled water in which a cleaning agent was dissolved, and washed with ultrasonic waves for 10 minutes, and then the ultrasonic washing of the glass substrate with distilled water was repeated twice for 10 minutes. After washing the glass substrate with distilled water, the glass substrate was subjected to ultrasonic washing with an isopropanol solvent for 10 minutes, and then dried. Thereafter, the substrate was conveyed to a glove box.

A 2 wt% cyclohexanone solution containing the following compound a and the following compound B in a weight ratio of 8:2 was spin-coated onOn the ITO transparent electrode prepared as described above, and heat-treated at 230℃for 30 minutes, thereby forming a transparent ITO electrode having a thickness ofIs provided. A0.8 wt% toluene solution containing Polymer 6 in Synthesis example 7 was spin-coated on the hole injection layer to thereby form a film having a thickness +. >Is provided. The following compounds C and D were dissolved in toluene at a weight ratio of 9:1 on the hole transport layer to form a thickness +.>Is provided. Vacuum depositing the following compound E on the light-emitting layer to form a thickness +.>Electron injection and transport layers of (a) are provided. Sequentially depositing LiF and aluminum on the electron injection and transport layer to a thickness of +.>And->Thereby forming a cathode.

In the foregoing step, the deposition rate of the organic material is maintained atTo->The deposition rates of LiF and aluminum of the cathode are kept at +.>And->And the vacuum degree during deposition is maintained at 2×10 ^-8 To 5X 10 ^-6 And (5) a bracket.

Examples 2-7 to 2-14.

In examples 2-7 to 2-14, organic light emitting devices were manufactured in the same manner as in examples 2-6, except that the polymer of the following table 4 was used instead of the polymer 6 in examples 2-6.

Comparative examples 2-3 to 2-5.

In comparative examples 2-3 to 2-5, an organic light emitting device was manufactured in the same manner as in examples 2-6, except that the following compound Q5, polymer Q3, and polymer Q4 were used instead of polymer 6 in examples 2-6.

TABLE 4

From table 4, it can be confirmed that the organic light emitting devices (examples 2-6 to 2-14) to which the polymer according to the present invention was applied exhibited high efficiency as compared with the organic light emitting devices (comparative examples 2-3 to 2-5) to which the additional polymer or compound Q5 was applied. This is because the charge/hole transfer balance is adjusted by including the first unit and the second unit having different charge mobilities in the polymer of the present invention.

In summary, from tables 3 and 4, it can be determined that the polymer comprising the first unit and the second unit has superior properties compared to the polymer comprising only one of the two units.

Although the preferred exemplary embodiment (hole transport layer) of the present invention has been described above, the present invention is not limited thereto, and various modifications may be made and made within the scope of the claims and detailed description of the present invention, and such modifications also fall within the scope of the present invention.

Claims

1. A polymer, comprising:

a first unit represented by the following chemical formula 1;

a second unit represented by the following chemical formula 1 and different from the first unit;

a third unit represented by the following chemical formula 2; and

a terminal group represented by the following chemical formula 3:

[ chemical formula 1]

[ chemical formula 2]

[ chemical formula 3]

^＊ -[E]

Wherein, in chemical formulas 1 to 3,

m is an integer of 3 or 4,

* Is the point of attachment in the polymer.

2. The polymer of claim 1, wherein the polymer is represented by the following chemical formula 4:

[ chemical formula 4]

E1-[A1] _a -[B1] _b -[C1] _c -E2

In the chemical formula 4, the chemical formula is shown in the drawing,

a1 is the first unit represented by chemical formula 1,

c1 is the third unit represented by chemical formula 2,

e1 and E2 are the same or different from each other and are each independently the end group represented by chemical formula 3, and

3. The polymer of claim 1, wherein chemical formula 1 is represented by any one of the following chemical formulas 1-1 to 1-4:

[ chemical formula 1-1]

[ chemical formulas 1-2]

[ chemical formulas 1-3]

[ chemical formulas 1-4]

In chemical formulas 1-1 to 1-4,

* Is the point of attachment in the polymer.

4. The polymer of claim 1, wherein at least one of the first unit and the second unit is of the following chemical formula 1-A1:

[ chemical formula 1-A1]

In the chemical formula 1-A1,

rx1 to Rx3 and Ry1 to Ry3 are the same or different from each other and are each independently hydrogen; or a substituted or unsubstituted alkyl group,

* Is the point of attachment in the polymer.

5. The polymer of claim 4, wherein Rx2 and Ry2 are the same or different from each other and are each independently branched alkyl groups having from 4 to 30 carbon atoms.

6. The polymer of claim 4, wherein L1 is a direct bond and L2 is a substituted or unsubstituted phenylene group.

7. The polymer of claim 1, wherein chemical formula 2 is any one of the following chemical formulas 2-1 to 2-4:

[ chemical formula 2-1]

[ chemical formula 2-2]

[ chemical formulas 2-3]

[ chemical formulas 2-4]

In chemical formulas 2-1 to 2-4,

z1 is CRa; siRa; n; or a substituted or unsubstituted trivalent aryl group,

l10 is a direct bond; or a substituted or unsubstituted arylene group,

r50 to R60 are the same or different from each other and are each independently hydrogen; deuterium; a halogen group; cyano group; an alkoxy group; an aryloxy group; a siloxane group; a substituted or unsubstituted amine group; a substituted or unsubstituted alkyl group; substituted or unsubstituted aryl; a substituted or unsubstituted heterocyclic group; or crosslinkable groups, and adjacent groups can bond to each other to form a ring,

* Is the point of attachment in the polymer.

8. The polymer of claim 1, wherein E is a substituted or unsubstituted alkyl; substituted or unsubstituted aryl; a crosslinkable group; or a combination thereof.

9. The polymer of claim 1, wherein E is a crosslinkable group; or any of the following structures:

* Is the point of attachment in the polymer.

10. The polymer of claim 1, wherein the crosslinkable group is any of the following structures:

is a moiety bonded to chemical formula 3.

11. The polymer of claim 1, wherein the first unit and the second unit are different from each other and are each any of the following structures:

12. the polymer of claim 1, wherein the polymer is any one of the following structures:

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13. An organic light emitting device comprising:

a first electrode;

a second electrode; and

an organic material layer having one or more layers disposed between the first electrode and the second electrode,

wherein one or more of the layers of organic material comprises a polymer according to any one of claims 1 to 12.

14. The organic light-emitting device according to claim 13, wherein the organic material layer containing the polymer is a hole injection layer, a hole transport layer, or a layer that simultaneously injects and transports holes.