Polymer and organic light-emitting device using same

Abstract

The present specification relates to a polymer and an organic light-emitting device using the same.

Description

[Technical field]

[0001] This application claims the benefit of the filing date of Korean Patent Application No. 10-2021-0180872, filed with the Korean Intellectual Property Office on December 16, 2021, the entire contents of which are incorporated herein by reference.

[0002] SUMMARY This specification relates to polymers and organic light emitting devices formed therewith. [Background technology]

[0003] The organic light-emitting phenomenon is an example of a phenomenon in which electric current is converted into visible light by an internal process of a specific organic molecule. The principle of the organic light-emitting phenomenon is as follows. When an organic layer is placed between an anode and a cathode, and an electric current is applied between the two electrodes, electrons and holes are injected into the organic layer from the cathode and anode, respectively. The electrons and holes injected into the organic layer recombine to form excitons, which then fall back to the ground state to emit light. An organic electroluminescent device using this principle may generally be composed of a cathode, an anode, and organic layers positioned therebetween, such as a hole injection layer, a hole transport layer, an emission layer, an electron transport layer, and an electron injection layer.

[0004] The majority of materials used in organic light-emitting devices are pure organic materials or complex compounds in which an organic material and a metal form a complex. They can be classified into hole injection materials, hole transport materials, light-emitting materials, electron transport materials, electron injection materials, etc. according to the purpose. Here, organic materials having p-type properties, i.e., organic materials that are easily oxidized and have an electrochemically stable state when oxidized, are mainly used as hole injection materials and hole transport materials. On the other hand, organic materials having n-type properties, i.e., organic materials that are easily reduced and have an electrochemically stable state when reduced, are mainly used as electron injection materials and electron transport materials. As the light-emitting material, materials having both p-type properties and n-type properties at the same time, i.e., materials that are stable in both the oxidized and reduced states, and materials with high luminous efficiency that convert excitons into light when they are formed are preferred.

[0005] In addition to the above, it is preferable that the material used in the organic light emitting device further has the following properties. First, it is preferable that materials used in organic light-emitting devices have excellent thermal stability. This is because Joule heating occurs due to the movement of charges in organic light-emitting devices. Currently, NPB (N,N'-di(1-naphthyl)-N,N'-diphenyl-(1,1'-biphenyl)-4,4'-diamine), which is mainly used as a hole transport layer material, has a glass transition temperature of 100°C or less, making it difficult to use in organic light-emitting devices that require high current.

[0006] Second, to obtain a highly efficient organic light-emitting device that can be driven at a low voltage, the holes or electrons injected into the organic light-emitting device must be smoothly transferred to the light-emitting layer and the injected holes and electrons must not escape to the light-emitting layer. For this reason, the material used in the organic light-emitting device must have a suitable band gap and HOMO (Highest Occupied Molecular Orbital) or LUMO (Lowest Unoccupied Molecular Orbital) energy level. Currently, in the case of PEDOT:PSS (Poly(3,4-ethylenedioxythiophene) doped:poly(styrenesulfonic acid)), which is used as a hole transport material in organic light-emitting devices manufactured by a solution coating method, the LUMO energy level is lower than the LUMO energy level of the organic material used as the light-emitting layer material, making it difficult to manufacture a highly efficient and long-life organic light-emitting device.

[0007] In addition, materials used in organic light emitting devices should have excellent chemical stability, charge mobility, and interface properties with electrodes and adjacent layers. That is, materials used in organic light emitting devices should be less susceptible to deformation due to moisture or oxygen. In addition, materials should have suitable hole or electron mobility to balance the density of holes and electrons in the light emitting layer of the organic light emitting device and maximize the formation of excitons. In addition, materials should have good interfaces with electrodes containing metals or metal oxides for device stability.

[0008] In addition to the above, materials used in the solution processable organic light emitting device should further have the following properties.

[0009] First, a homogeneous solution that can be stored must be formed. Commercially available materials for deposition processes have good crystallinity and do not dissolve well in solution, or even if a solution is formed, crystals tend to form, so there is a high possibility that the concentration gradient of the solution will change or defective devices will be formed depending on the storage period.

[0010] Secondly, the layer undergoing the solution process must be resistant to solvents and materials compared to other layers. For this purpose, materials that can form a polymer that is crosslinked by itself on the substrate by heat treatment or UV (ultraviolet) irradiation after introducing a curing group such as VNPB (N4,N4'-di(naphthalene-1-yl)-N4,N4'-bis(4-vinylphenyl)biphenyl-4,4'-diamine) or that can form a polymer that is sufficiently resistant to the next process after solution coating are preferred, and materials that can be resistant to solvents by themselves such as HATCN (hexaazatriphenylenehexacarbonitrile) are also preferred.

[0011] Therefore, there is a need in this technical field to develop an organic material that satisfies the above requirements. Summary of the Invention [Problem to be solved by the invention]

[0012] An object of the present specification is to provide a polymer and an organic light-emitting device formed using the same. [Means for solving the problem]

[0013] One embodiment of the present invention provides a polymer represented by the following chemical formula 1: [ka] In the above Chemical Formula 1, A1 is represented by the following chemical formula 2: B1 is represented by the following chemical formula 3: C1 is a substituted or unsubstituted arylene group; or a substituted or unsubstituted divalent heterocyclic group; E1 and E2 are the same as or different from each other, and each independently is hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted siloxane group; a crosslinkable group; or a combination thereof, a, b, and c are each a mole fraction, a is a real number such that 0 < a ≤ 1, b is a real number such that 0 ≤ b < 1, c is a real number such that 0 ≤ c < 1, a + b + c = 1,

[0014]

Chemical formula

[0015]

Chemical formula

[0016] Another embodiment of the present invention provides a polymer comprising a unit represented by the following formula 2; and a terminal group represented by the following formula 5:

[0017] [ka] In the above Chemical Formulas 2 and 5, Ar1, Ar2, L1, and L2 are the same or different and each independently represents a substituted or unsubstituted arylene group; R1 to R3 are the same or different and each independently represents hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group; R10 to R13 are the same or different and each independently represents a substituted or unsubstituted alkyl group; n1 to n3 are each an integer from 1 to 4, When n1 to n3 each represent 2 or more, the substituents in each parentheses are the same or different, l1 and l2 are each an integer from 1 to 5; When l1 and l2 are each 2 or more, the structures in the respective brackets are the same or different from each other, E is hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted siloxane group; a crosslinkable group; or a combination thereof; * indicates a point of attachment within the polymer.

[0018] Another embodiment of the present invention provides an organic light-emitting device comprising: a first electrode; a second electrode; and one or more organic layers disposed between the first electrode and the second electrode, wherein one or more of the organic layers contains the polymer. Effect of the Invention

[0019] The polymer according to one embodiment of the present invention includes a unit of Formula 2 substituted with a branched alkyl group, which has the effect of improving the solubility of the produced polymer.

[0020] Furthermore, the polymer according to an embodiment of the present invention can be applied to an organic light emitting device to improve the performance and / or stability of the device. [Brief description of the drawings]

[0021] [Figure 1] 1 illustrates the structure of an organic light-emitting device according to some embodiments herein. [Diagram 2] 1 illustrates the structure of an organic light-emitting device according to some embodiments herein. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] The present invention will now be described in more detail.

[0023] The present invention provides a polymer represented by the following Chemical Formula 1: [ka] In the formula (1), A1 is represented by the following formula (2), B1 is represented by the following formula (3), C1 is a substituted or unsubstituted arylene group; or a substituted or unsubstituted divalent heterocyclic group, E1 and E2 are the same as or different from each other, and each independently is hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted siloxane group; a crosslinkable group; or a combination thereof, a, b, and c are molar fractions, respectively, a is a real number satisfying 0 < a ≤ 1, b is a real number satisfying 0 ≤ b < 1, c is a real number satisfying 0 ≤ c < 1, a + b + c = 1,

[0024] [Chemical formula] In the formula (2), Ar1, Ar2, L1, and L2 are the same as or different from each other, and each independently is a substituted or unsubstituted arylene group, R1 to R3 are the same as or different from each other, and each independently is hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group, R10 to R13 are the same as or different from each other, and each independently is a substituted or unsubstituted alkyl group, n1 to n3 are each an integer from 1 to 4, When n1 to n3 are each 2 or more, the substituents in each parenthesis are the same as or different from each other, l1 and l2 are each an integer from 1 to 5, When l1 and l2 are each 2 or more, the substituents in each bracket are the same or different. * is a point of attachment within the polymer,

[0025] [ka] In the above Chemical Formula 3, m is an integer of 3 or 4, When m is 3, Z is CRa; SiRa; N; or a trivalent substituted or unsubstituted aryl group; When m is 4, Z is C; Si; or a tetravalent substituted or unsubstituted 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 trivalent or tetravalent substituted or unsubstituted aryl group; * indicates a point of attachment within the polymer.

[0026] In one embodiment of the present invention, the polymer of formula 2 contains a branched alkyl group. This improves the solubility of the polymer produced compared to a polymer containing a linear alkyl group. The increased solubility leads to the formation of an excellent thin film during device fabrication by solution processing, thereby improving the performance of the device produced. Specifically, the polymer contains a branched alkyl group, and thus can exhibit stable driving voltage, improved efficiency, and / or long life characteristics when applied to a device.

[0027] In one embodiment of the present invention, the polymer has a molecular weight distribution (PDI) of 1 to 10. Preferably, the polymer has a molecular weight distribution of 1 to 5. More preferably, the polymer has a molecular weight distribution of 1 to 4.

[0028] In this specification, the molecular weight distribution (PDI) is calculated by the following formula (1). Formula (1): PDI=weight average molecular weight (Mw) / number average molecular weight (Mn)

[0029] A large molecular weight distribution of a polymer means that molecules of various molecular weights are distributed, which means that it is difficult to synthesize a polymer with good reproducibility. Therefore, the larger the molecular weight distribution, the lower the uniformity of the polymer. In other words, the closer the molecular weight distribution is to 1, the more homogeneous the polymer is produced.

[0030] In one embodiment of the present invention, the molecular weight of the polymer is measured by a Gel Permeation Chromatography (GPC) method.

[0031] In this specification, when a member is said to be located "on" another member, this includes not only the case where the member is in contact with the other member, but also the case where another member is present between the two members.

[0032] In this specification, when a part "comprises" a certain component, this does not mean excluding other components, but means that the part may further include other components, unless otherwise specified to the contrary.

[0033] The term "substituted" means that a hydrogen atom bonded to a carbon atom of a compound is replaced with another substituent, and the position of the substitution is not limited as long as it is a position at which a hydrogen atom is substituted, i.e., a position at which a substituent can be substituted, and when two or more substituents are substituted, the two or more substituents may be the same or different.

[0034] In this specification, the term "substituted or unsubstituted" means that the group is substituted with one or more substituents selected from the group consisting of deuterium, halogen, alkyl, cycloalkyl, alkoxy, aryloxy, amine, aryl, and heterocyclic groups, or that the group is substituted with a substituent in which two or more of the above-listed substituents are linked, or that the group does not have any substituents. For example, the "substituent in which two or more substituents are linked" may be a biphenyl group. That is, the biphenyl group may be an aryl group, and may be interpreted as a substituent in which two phenyl groups are linked.

[0035] Examples of the substituents are described below, but are not limited thereto.

[0036] As used herein, examples of halogen groups include fluorine (F), chlorine (Cl), bromine (Br), or iodine (I).

[0037] In this specification, the alkyl group may be linear or branched, and the number of carbon atoms is not particularly limited, but is preferably 1 to 60. According to one embodiment, the number of carbon atoms of the alkyl group is 1 to 30. Specific examples of the alkyl group include, but are not limited to, a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a tert-butyl group, a pentyl group, a hexyl group, a heptyl group, and an octyl group.

[0038] In this specification, the number of carbon atoms in the cycloalkyl group is not particularly limited, but is preferably 3 to 60. According to one embodiment, the number of carbon atoms in the cycloalkyl group is 3 to 30. Specific examples of the cycloalkyl group include, but are not limited to, a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, and a cyclooctyl group.

[0039] In this specification, the alkoxy group may be linear, branched, or cyclic. The number of carbon atoms in the alkoxy group is not particularly limited, but it is preferable that the number of carbon atoms is 1 to 30. Specific examples of the alkoxy group include, but are not limited to, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, tert-butoxy, sec-butoxy, n-pentyloxy, neopentyloxy, isopentyloxy, n-hexyloxy, 3,3-dimethylbutyloxy, 2-ethylbutyloxy, n-octyloxy, n-nonyloxy, and n-decyloxy.

[0040] As used herein, a fluoroalkoxy group refers to an alkoxy group substituted with F.

[0041] In the present specification, the amine group may be selected from the group consisting of, but is not limited to, -NH2, alkylamine group, arylalkylamine group, arylamine group, arylheteroarylamine group, alkylheteroarylamine group, and heteroarylamine group. The number of carbon atoms in the amine group is not particularly limited, but is preferably 1 to 60.

[0042] In this specification, the number of carbon atoms in the aryl group is not particularly limited, but is preferably 6 to 60. According to one embodiment, the number of carbon atoms of the aryl group is 6 to 30. In one embodiment of the present invention, the aryl group may be a monocyclic aryl group or a polycyclic aryl group. Examples of the monocyclic aryl group include, but are not limited to, a phenyl group, a biphenyl group, and a terphenyl group. Examples of the polycyclic aryl group include, but are not limited to, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, a perylenyl group, a triphenylenyl group, a chrysenyl group, and a fluorenyl group.

[0043] In the present specification, an arylene group refers to an aryl group having two bonding positions, i.e., a divalent group. The above description of the aryl group may be applied, except that each of these is a divalent group.

[0044] In this specification, examples of the arylamine group include a substituted or unsubstituted monoarylamine group, a substituted or unsubstituted diarylamine 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. The arylamine group containing two or more aryl groups may contain a monocyclic aryl group, a polycyclic aryl group, or a monocyclic aryl group and a polycyclic aryl group at the same time. For example, the aryl group in the arylamine group may be selected from the examples of the aryl group described above.

[0045] In the present specification, the heterocyclic group includes one or more non-carbon atoms, i.e., heteroatoms, and specifically, the heteroatoms may include one or more atoms selected from the group consisting of O, N, Se, and S. The number of carbon atoms in the heterocyclic group is not particularly limited, but is preferably 2 to 30. In one embodiment of the present invention, the heterocyclic group may be monocyclic or polycyclic. Examples of heterocyclic groups include, but are not limited to, thiophene, furan, pyrrole, imidazole, thiazole, oxazole, oxadiazole, pyridine, bipyridine, pyrimidine, triazine, triazole, acridine, pyridazine, pyrazine, quinoline, quinazoline, quinoxaline, phthalazine, pyridopyrimidine, pyridopyrazine, pyrazinopyrazine, isoquinoline, indole, carbazole, benzoxazole, benzimidazole, benzothiazole, benzocarbazole, benzothiophene, dibenzothiophene, benzofuran, phenanthridine, phenanthroline, isoxazole, thiadiazole, phenothiazine, and dibenzofuran groups.

[0046] In this specification, the divalent heterocycle may be a monocycle or a polycycle, and means that the heterocycle has two bonding positions. For example, the divalent heterocycle may include, but is not limited to, a divalent thiophene group, a divalent carbazole group, a divalent dibenzofuran group, and a divalent dibenzothiophene group.

[0047] As used herein, an aryloxy group is defined as -OR 200 R 200 is an aryl group. The aryl group in the aryloxy group is the same as the above-mentioned examples of the aryl group. Specific examples of the aryloxy group include, but are not limited to, a phenoxy group, benzyloxy, p-methylbenzyloxy, p-tolyloxy, m-tolyloxy, 3,5-dimethyl-phenoxy, 2,4,6-trimethylphenoxy, p-tert-butylphenoxy, 3-biphenyloxy, 4-biphenyloxy, 1-naphthyloxy, 2-naphthyloxy, 4-methyl-1-naphthyloxy, 5-methyl-2-naphthyloxy, 1-anthryloxy, 2-anthryloxy, 9-anthryloxy, 1-phenanthryloxy, 3-phenanthryloxy, and 9-phenanthryloxy groups.

[0048] As used herein, a silyl group is defined as -SiR 201 R 202 R 203 R 201 , R 202 , and R 203 are the same or different and each independently represents hydrogen, deuterium, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group. The silyl group includes, but is not limited to, a trimethylsilyl group, a triethylsilyl group, a t-butyldimethylsilyl group, a vinyldimethylsilyl group, a propyldimethylsilyl group, a triphenylsilyl group, a diphenylsilyl group, and a phenylsilyl group.

[0049] As used herein, a siloxane group is defined as -Si(R 204 )2OSi(R 205 )3 or -OSi(R 204 )3Si(R 205 ) 3, where R 204 and R 205 are the same or different and are each independently hydrogen; deuterium; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group.

[0050] In the present specification, a crosslinkable group may refer to a reactive substituent that crosslinks compounds when exposed to heat, light, and / or radiation. Crosslinks can be generated by linking radicals generated by decomposing carbon-carbon multiple bonds and cyclic structures by heat treatment, light irradiation, and / or radiation.

[0051] In one embodiment of the present invention, the crosslinkable group has one of the following structures: [ka]

[0052] In the above structure, [ka] denotes a site of attachment to another substituent or bond.

[0053] In this specification, the term "adjacent" groups may refer to a substituent substituted on an atom directly connected to the atom on which the substituent is substituted, a substituent sterically closest to the substituent, or another substituent substituted on the atom on which the substituent is substituted. For example, two substituents substituted at the ortho positions on a benzene ring and two substituents substituted on the same carbon atom on an aliphatic ring can be interpreted as "adjacent" groups to each other.

[0054] As used herein, in a ring formed by bonding adjacent groups to each other, the term "ring" refers to a substituted or unsubstituted hydrocarbon ring; or a substituted or unsubstituted heterocycle.

[0055] As used herein, "mole fraction" means the ratio of moles of a given component to the total number of moles of all components.

[0056] In the present specification, the term "combination of substituents" refers to a substituent in which two or more of the exemplified substituents are linked. For example, hydrogen; deuterium; substituted or unsubstituted alkyl group; substituted or unsubstituted aryl group; crosslinkable group; or a combination thereof, "combination" refers to a substituent in which two or more of the exemplified substituents are linked. Examples include, but are not limited to, a structure in which an alkyl group is linked to a crosslinkable group, and a structure in which an alkyl group is linked to an aryl group.

[0057] In one embodiment of the present invention, L1 and L2 are the same or different and each independently represents a substituted or unsubstituted arylene group having 6 to 30 carbon atoms.

[0058] In one embodiment of the present invention, L1 and L2 are the same or different and each independently represent a substituted or unsubstituted phenylene group; a substituted or unsubstituted biphenylene group; or a substituted or unsubstituted naphthylene group.

[0059] In one embodiment of the present invention, L1 and L2 are the same or different and each independently represents a phenylene group; a biphenylene group; or a naphthylene group.

[0060] In one embodiment of the present invention, the above-mentioned formula 2 is represented by the following formula 2-1. [ka] In the above Chemical Formula 2-1, R1 to R3, R10 to R13, Ar1, Ar2, and n1 to n3 are the same as defined in Chemical Formula 2. L3 and L4 are the same or different and each independently represent a direct bond; or a substituted or unsubstituted arylene group; R15 and R16 are the same or different, and each independently represents hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group; n15 and n16 are each an integer of 1 to 4, When n15 and n16 are each 2 or more, the substituents in each bracket are the same or different. l3 and l4 are each an integer from 1 to 4, When l3 and l4 are each 2 or more, the structures in the respective brackets are the same or different from each other, * indicates a point of attachment within the polymer.

[0061] In one embodiment of the present invention, Ar1 and Ar2 are the same or different and each independently represents a substituted or unsubstituted arylene group having 6 to 30 carbon atoms.

[0062] In one embodiment of the present invention, Ar1 and Ar2 are the same or different and each independently represents a substituted or unsubstituted phenylene group; a substituted or unsubstituted biphenylene group; or a substituted or unsubstituted terphenylene group.

[0063] In one embodiment of the present invention, Ar1 and Ar2 are the same or different and each independently represents a phenylene group; a biphenylene group; or a terphenylene group.

[0064] In one embodiment of the present invention, the above-mentioned Chemical Formula 2 is represented by the following Chemical Formula 2-2. [ka] In the above Chemical Formula 2-2, R1 to R3, R10 to R13, and n1 to n3 are the same as defined in Chemical Formula 2; R15 to R18 are the same or different and each independently represents hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group; m1, m2, h1, and h2 are each an integer of 1 to 3; When m1, m2, h1, and h2 are each 2 or more, the structures in the respective brackets are the same or different from each other, n15 to n18 are integers from 1 to 4, When n15 to n18 are each 2 or more, the substituents in each bracket are the same or different. * indicates a point of attachment within the polymer.

[0065] In one embodiment of the present invention, the above-mentioned formula 2 is represented by the following formula 2-3. [ka] In the above Chemical Formula 2-3, R10 to R13 are the same as defined in Chemical Formula 2. R1 to R3, R2', and R15 to R18 are the same or different and each independently represents hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group; m1, m2, h1, and h2 are each an integer of 1 to 3; When m1, m2, h1, and h2 are each 2 or more, the structures in the respective brackets are the same or different from each other, n15 to n18 are integers from 1 to 4, When n15 to n18 are each 2 or more, the substituents in each bracket are the same or different. * indicates a point of attachment within the polymer.

[0066] In one embodiment of the present invention, the above-mentioned formula 2 is represented by the following formula 2-4 or 2-5. [ka] In the above Chemical Formulas 2-4 and 2-5, R10 to R13 are the same as defined in Chemical Formula 2. R1 to R3, R2', R15 to R18, R15', and R16' are the same or different and each independently represents hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group; h1 and h2 are each an integer of 1 to 3, When h1 and h2 are each 2 or more, the structures in the respective brackets are the same or different, n17 to n18 are integers from 1 to 4, When n17 to n18 are each 2 or more, the substituents in each bracket are the same or different. * indicates a point of attachment within the polymer.

[0067] In one embodiment of the present invention, R1 to R3 are each independently hydrogen; deuterium; or a substituted or unsubstituted alkyl group.

[0068] In one embodiment of the present invention, one or more of R1 to R3 is a substituted or unsubstituted alkyl group.

[0069] In one embodiment of the present invention, any one of R1 to R3 is a substituted or unsubstituted alkyl group.

[0070] In one embodiment of the present invention, two of R1 to R3 are substituted or unsubstituted alkyl groups.

[0071] In one embodiment of the present invention, R1 to R3 are all substituted or unsubstituted alkyl groups.

[0072] In one embodiment of the present invention, R1 to R3 are the same or different and each independently represent hydrogen; deuterium; or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, and at least one of R1 to R3 is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms.

[0073] In one embodiment of the present invention, R1 to R3 are the same or different and each independently represent hydrogen; deuterium; or an alkyl group, and at least one of R1 to R3 is an alkyl group.

[0074] In one embodiment of the present invention, R1 to R3 are the same or different and each independently represent a hydrogen atom, a deuterium atom, a methyl group, or a hexyl group, and at least one of R1 to R3 is a methyl group or a hexyl group.

[0075] In one embodiment of the present invention, R1 and R3 are each a methyl group.

[0076] In one embodiment of the present invention, R2 is a hexyl group.

[0077] In one embodiment of the present invention, R2' is a hexyl group.

[0078] In one embodiment of the present invention, m1 and m2 are each 1 or 2.

[0079] In one embodiment of the present invention, h1 and h2 are each 2.

[0080] In one embodiment of the present invention, R15 to R18 are the same or different and each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group.

[0081] In one embodiment of the present invention, R15 to R18 are the same or different and each independently represents a hydrogen atom or an alkyl group.

[0082] In one embodiment of the present invention, R15 to R18 are the same or different and each independently represents a hydrogen atom or an alkyl group having 1 to 30 carbon atoms.

[0083] In one embodiment of the present invention, R15 to R18 are the same or different and each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.

[0084] In one embodiment of the present invention, R15 to R18 are the same or different and each independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.

[0085] In one embodiment of the present invention, R15 to R18 are the same or different and each independently represents a hydrogen atom or a methyl group.

[0086] In one embodiment of the present invention, R15 to R18 are the same or different and each independently represent a hydrogen atom or a substituted or unsubstituted alkyl group.

[0087] In one embodiment of the present invention, R15' and R16' are the same or different and each independently represents a hydrogen atom or an alkyl group.

[0088] In one embodiment of the present invention, R15' and R16' are the same or different and each independently represents a hydrogen atom or an alkyl group having 1 to 30 carbon atoms.

[0089] In one embodiment of the present invention, R15' and R16' are the same or different and each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.

[0090] In one embodiment of the present invention, R15' and R16' are the same or different and each independently represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.

[0091] In one embodiment of the present invention, R15' and R16' are the same or different and each independently represent a hydrogen atom or a methyl group.

[0092] In one embodiment of the present invention, R10 to R13 each represent an alkyl group.

[0093] In one embodiment of the present invention, R10 to R13 each represent an alkyl group having 1 to 10 carbon atoms.

[0094] In one embodiment of the present invention, R10 to R13 are each a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, or a hexyl group.

[0095] In one embodiment of the present invention, the formula 2 has the following structure:

[0096] [ka] In the above structure, * is the point of attachment within the polymer.

[0097] In one embodiment of the present invention, the unit represented by Chemical Formula 2 contained in the polymer contains a branched alkyl group, which has the effect of improving the uniformity of the produced polymer.

[0098] In one embodiment of the invention, hydrogen can be replaced by deuterium, e.g., hydrogen in the above structure can be replaced by deuterium.

[0099] In one embodiment of the present invention, a is a molar fraction and is a real number satisfying 0 < a ≤ 1. That is, the polymer necessarily contains A1.

[0100] In one embodiment of the present invention, b is a molar fraction and is a real number satisfying 0 ≤ b < 1. That is, the polymer selectively contains B1.

[0101] In one embodiment of the present invention, b is a real number satisfying 0 < b < 1.

[0102] In one embodiment of the present invention, B1 in Chemical Formula 1 is a unit represented by Chemical Formula 3.

[0103] In one embodiment of the present invention, B1 is a unit having 3 or 4 bonding points.

[0104] In one embodiment of the present invention, Y is a direct bond; or a substituted or unsubstituted arylene group.

[0105] In one embodiment of the present invention, Y is a direct bond; or a substituted or unsubstituted phenylene group.

[0106] In one embodiment of the present invention, Chemical Formula 3 is represented by any one of the following Chemical Formulas 3-1 to 3-4.

[0107]

Chemical formula

[0108]

Chemical formula

[0109] In Chemical Formulas 3-1 to 3-4, Z1 is CRa; SiRa; N; or a trivalent substituted or unsubstituted aryl group, Z2 and Z3 are the same or different and each independently represents C; Si; or a tetravalent substituted or unsubstituted aryl group; L10 is a direct bond; or a substituted or unsubstituted arylene group; Ra is hydrogen; deuterium; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group; R20 to R30 are the same or different and each independently represents hydrogen; deuterium; a halogen group; a 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; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; or a crosslinkable group, and adjacent groups may be bonded to each other to form a ring; k1 is an integer from 1 to 4, k2 is an integer from 1 to 5, When k1 is 2 or more, the substituents in the brackets may be the same or different. When k2 is 2 or more, the substituents in the brackets are the same or different from each other. * indicates a point of attachment within the polymer.

[0110] In one embodiment of the present invention, the chemical formula 3 is represented by the chemical formula 3-1.

[0111] In one embodiment of the present invention, Z1 is CRa or SiRa, and when Ra is a substituted or unsubstituted aryl group, L10 is a substituted or unsubstituted arylene group.

[0112] In one embodiment of the present invention, Z1 is CH; SiH; N; or a substituted or unsubstituted trivalent aryl group.

[0113] In one embodiment of the present invention, Z1 is CH; SiH; N; or a substituted or unsubstituted trivalent phenyl group.

[0114] In one embodiment of the present invention, Z1 is N; or a trivalent phenyl group.

[0115] In one embodiment of the present invention, L10 is a direct bond; or a substituted or unsubstituted arylene group having 6 to 30 carbon atoms.

[0116] In one embodiment of the present invention, L10 is a direct bond; or an arylene group having 6 to 30 carbon atoms.

[0117] In one embodiment of the present invention, L10 is a direct bond; or a phenylene group.

[0118] In one embodiment of the present invention, L10 is a direct bond.

[0119] In one embodiment of the present invention, the chemical formula 3 is represented by the chemical formula 3-2.

[0120] In one embodiment of the present invention, Z2 is C; or Si.

[0121] In one embodiment of the present invention, the chemical formula 3 is represented by the chemical formula 3-3.

[0122] In one embodiment of the present invention, Z3 is C; or Si.

[0123] In one embodiment of the present invention, the chemical formula 3 is represented by the chemical formula 3-4.

[0124] In one embodiment of the present invention, the formula 3 has any one of the following structures:

[0125] [ka]

[0126] In the above structure, R20 to R30 are the same or different and each independently represents hydrogen; deuterium; a halogen group; a 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; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; or a crosslinkable group, and adjacent groups may be bonded to each other to form a ring; k1 is an integer from 1 to 4, k2 is an integer from 1 to 5, When k1 is 2 or more, the substituents in the brackets may be the same or different. When k2 is 2 or more, the substituents in the brackets are the same or different from each other. * indicates a point of attachment within the polymer.

[0127] In one embodiment of the present invention, R20 to R30 are each hydrogen.

[0128] Specifically, the formula 3 is any one of the following structures: [ka] In the above structure, * is the point of attachment within the polymer.

[0129] More specifically, the formula 3 is any one of the following structures: [ka] In the above structure, * is the point of attachment within the polymer.

[0130] More specifically, the formula 3 is any one of the following structures: [ka] In the above structure, * is the point of attachment within the polymer.

[0131] In one embodiment of the present invention, the c is a mole fraction and is a real number of 0≦c<1. That is, the polymer selectively contains C1.

[0132] In one embodiment of the present invention, C1 in Formula 1 is a unit having two attachment points.

[0133] In one embodiment of the present invention, C1 in Chemical Formula 1 is a substituted or unsubstituted arylene group; or a substituted or unsubstituted divalent heterocyclic group.

[0134] In one embodiment of the present invention, C1 in Chemical Formula 1 is an arylene group which is unsubstituted or substituted with deuterium or a crosslinkable group; or a divalent heterocyclic group which is unsubstituted or substituted with deuterium or a crosslinkable group.

[0135] In one embodiment of the present invention, C1 is any one of the following structures: [ka]

[0136] In the above structure, Y1 is S, O, or NR100; R50 to R59 and R100 are the same or different and each independently represents hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; or a crosslinkable group; k3 is an integer of 1 or 2, k4 is an integer from 1 to 4, k5 is an integer from 1 to 3, k6 is an integer from 1 to 8, When k3 to k6 each represent 2 or more, the substituents in each parentheses are the same or different, * indicates a point of attachment within the polymer.

[0137] Specifically, C1 is any one of the following structures: [ka]

[0138] In the above structure, Y1 is S, O, or NR100; R50 to R59 and R100 are the same or different and each independently represents hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; or a crosslinkable group; k3 is an integer of 1 or 2, k4 is an integer from 1 to 4, k5 is an integer from 1 to 3, k6 is an integer from 1 to 8, When k3 to k6 each represent 2 or more, the substituents in each parentheses are the same or different, * indicates a point of attachment within the polymer.

[0139] More specifically, C1 is any one of the following structures: [ka] In the above structure, * is the point of attachment within the polymer.

[0140] In one embodiment of the invention, E1 and E2 are end-capping units of the polymer.

[0141] In one embodiment of the invention, E1 and E2 are units with only one point of attachment.

[0142] In one embodiment of the present invention, E1 and E2 are the same or different and each independently represent a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a crosslinkable group; or a combination thereof.

[0143] In one embodiment of the present invention, E1 and E2 are the same or different and each independently represent a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms; a substituted or unsubstituted aryl group having 6 to 30 carbon atoms; a crosslinkable group; or a combination thereof.

[0144] In one embodiment of the present invention, E1 and E2 are the same or different and each independently represent 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.

[0145] In one embodiment of the present invention, E1 and E2 are the same or different and each independently represent a crosslinkable group; or any one of the following structures: [ka]

[0146] In the above structure, R40 to R42 are the same or different and each independently represents hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; or a crosslinkable group; L40 is a direct bond; a substituted or unsubstituted alkylene group; or a substituted or unsubstituted arylene group; i1 is an integer from 1 to 10, j1 and j3 are each an integer from 1 to 5, j2 is an integer from 1 to 4, When i1 is 2 or more, two or more L40 are the same or different from each other, When j1 to j3 each represent 2 or more, the substituents in each bracket are the same or different. * indicates a point of attachment within the polymer.

[0147] In one embodiment of the present invention, E1 and E2 are the same or different and each independently have any one of the following structures: [ka]

[0148] In the above structure, R40 to R42, L40, i1, j1 to j3, and * are as described above.

[0149] In one embodiment of the present invention, R40 to R42 are the same or different and each independently represents hydrogen; deuterium; an alkyl group having 1 to 10 carbon atoms; or a crosslinkable group.

[0150] In one embodiment of the present invention, L40 is a direct bond; an alkylene group having 1 to 10 carbon atoms; or an arylene group having 6 to 30 carbon atoms.

[0151] In one embodiment of the present invention, E1 and E2 are the same or different and each independently have any one of the following structures: [ka] In the above structure, * is the point of attachment within the polymer.

[0152] More specifically, E1 and E2 are the same or different and each independently represent one of the following structures: [ka] In the above structure, * is the point of attachment within the polymer.

[0153] In one embodiment of the present invention, the a, b, and c are determined according to the equivalent ratio of the monomers used in the preparation of the polymer.

[0154] In one embodiment of the present invention, a is a real number equal to or greater than 0.2. In one embodiment of the present invention, a is a real number of 0.2 to 1. In one embodiment of the present invention, a is a real number from 0.2 to 0.9.

[0155] In one embodiment of the present invention, b is a real number greater than or equal to 0. In one embodiment of the present invention, b is a real number from 0 to 0.5. In one embodiment of the present invention, b is a real number greater than 0 and less than or equal to 0.5. In one embodiment of the present invention, b is a real number from 0.1 to 0.4.

[0156] In one embodiment of the present invention, c is a real number from 0 to 0.2. In one embodiment of the present invention, c is a real number from 0 to 0.1. In one embodiment of the invention, c is 0.

[0157] In one embodiment of the present invention, a is a real number from 0.3 to 1, b is a real number from 0 to 0.5, and c is a real number from 0 to 0.2.

[0158] In one embodiment of the present invention, a is a real number of 0.3 to 1, b is a real number exceeding 0 and not exceeding 0.5, and c is a real number of 0 to 0.2.

[0159] In one embodiment of the present invention, a is a real number from 0.3 to 0.9, b is a real number from 0.1 to 0.4, and c is a real number from 0 to 0.2.

[0160] In the present invention, the a, b, and c are not based on the molar fraction of the entire polymer represented by Chemical Formula 1 including E1 and E2, but are based on the molar fraction of the sum of A1, B1, and C1.

[0161] In one embodiment of the present invention, the molar ratio of (A1+B1):(E1+E2) is from 40:60 to 98:2.

[0162] One embodiment of the present invention provides a polymer comprising a unit represented by the following chemical formula 2; and a terminal group represented by the following chemical formula 5: [ka]

[0163] In the above Chemical Formulas 2 and 5, Ar1, Ar2, L1, and L2 are the same or different and each independently represents a substituted or unsubstituted arylene group; R1 to R3 are the same or different and each independently represents hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group; R10 to R13 are the same or different and each independently represents a substituted or unsubstituted alkyl group; n1 to n3 are each an integer from 1 to 4, When n1 to n3 each represent 2 or more, the substituents in each parentheses are the same or different, l1 and l2 are each an integer from 1 to 5; When l1 and l2 are each 2 or more, the substituents in each bracket are the same or different. E is hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted siloxane group; a crosslinkable group; or a combination thereof; * indicates a point of attachment within the polymer.

[0164] In one embodiment of the present invention, the polymer represented by Chemical Formula 1 can be expressed as a polymer containing a unit represented by Chemical Formula 2; and a terminal group represented by Chemical Formula 5. Specifically, when b and c in Chemical Formula 1 are 0, the polymer represented by Chemical Formula 1 can be expressed as a polymer containing a unit represented by Chemical Formula 2; and a terminal group represented by Chemical Formula 5.

[0165] In one embodiment of the present invention, the polymer comprising the unit represented by Chemical Formula 2 and the end group represented by Chemical Formula 5 further comprises a unit represented by Chemical Formula 3 below. [ka] In the above Chemical Formula 3, m is an integer of 3 or 4, When m is 3, Z is CRa; SiRa; N; or a trivalent substituted or unsubstituted aryl group; When m is 4, Z is C; Si; or a tetravalent substituted or unsubstituted 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 trivalent or tetravalent substituted or unsubstituted aryl group; * indicates a point of attachment within the polymer.

[0166] That is, one embodiment of the present invention provides a polymer comprising a unit represented by Chemical Formula 2; a unit represented by Chemical Formula 3; and a terminal group represented by Chemical Formula 5.

[0167] In this case, the polymer represented by Chemical Formula 1 can be expressed as a polymer including the unit represented by Chemical Formula 2; the unit represented by Chemical Formula 3; and the terminal group represented by Chemical Formula 5.

[0168] Specifically, when b in Chemical Formula 1 is a real number greater than 0 and less than 1, and c is 0, the polymer represented by Chemical Formula 1 can be represented as a polymer including a unit represented by Chemical Formula 2; a unit represented by Chemical Formula 3; and an end group represented by Chemical Formula 5.

[0169] In one embodiment of the present invention, the polymer comprising the unit represented by Chemical Formula 2 and the end group represented by Chemical Formula 5 further comprises a unit represented by Chemical Formula 4 below. [ka] In the above Chemical Formula 4, C1 is a substituted or unsubstituted arylene group; or a substituted or unsubstituted divalent heterocyclic group; * indicates a point of attachment within the polymer.

[0170] That is, one embodiment of the present invention provides a polymer comprising a unit represented by Chemical Formula 2; a unit represented by Chemical Formula 4; and a terminal group represented by Chemical Formula 5.

[0171] In this case, the polymer represented by Chemical Formula 1 can be expressed as a polymer including the unit represented by Chemical Formula 2; the unit represented by Chemical Formula 4; and the terminal group represented by Chemical Formula 5.

[0172] Specifically, when b in Chemical Formula 1 is 0 and c is a real number greater than 0 and less than 1, the polymer represented by Chemical Formula 1 can be represented as a polymer including a unit represented by Chemical Formula 2; a unit represented by Chemical Formula 4; and an end group represented by Chemical Formula 5.

[0173] Another embodiment of the present invention provides a polymer comprising: a unit represented by Chemical Formula 2; a unit represented by Chemical Formula 3; a unit represented by Chemical Formula 4; and a terminal group represented by Chemical Formula 5.

[0174] In this case, the polymer represented by Chemical Formula 1 can be expressed as a polymer including a unit represented by Chemical Formula 2; a unit represented by Chemical Formula 3; a unit represented by Chemical Formula 4; and a terminal group represented by Chemical Formula 5.

[0175] Specifically, when b and c in Chemical Formula 1 are each a real number greater than 0 and less than 1, the polymer represented by Chemical Formula 1 can be represented as a polymer including a unit represented by Chemical Formula 2; a unit represented by Chemical Formula 3; a unit represented by Chemical Formula 4; and an end group represented by Chemical Formula 5.

[0176] In one embodiment of the present invention, the description of Chemical Formula 2 of the polymer comprising the unit represented by Chemical Formula 2 and the terminal group represented by Chemical Formula 5 is similarly applied to the description of Chemical Formula 2 described above in Chemical Formula 1. For example, in the polymer comprising the unit represented by Chemical Formula 2 and the terminal group represented by Chemical Formula 5, Chemical Formula 2 may be represented by Chemical Formula 2-1 or Chemical Formula 2-2.

[0177] In one embodiment of the present invention, when the polymer comprising the unit represented by Chemical Formula 2 and the terminal group represented by Chemical Formula 5 further comprises a unit represented by Chemical Formula 3, the explanation regarding Chemical Formula 3 described above for Chemical Formula 1 is similarly applied to the explanation regarding Chemical Formula 3. For example, in the polymer comprising the unit represented by Chemical Formula 2, the unit represented by Chemical Formula 3, and the terminal group represented by Chemical Formula 5, the chemical formula 3 may be represented by any one of the chemical formulas 3-1 to 3-4.

[0178] The explanation regarding Chemical Formulae 2 and 3 above is similarly applied to a polymer containing a unit represented by Chemical Formula 2; a unit represented by Chemical Formula 3; a unit represented by Chemical Formula 4; and a terminal group represented by Chemical Formula 5.

[0179] In one embodiment of the present invention, when the polymer comprising the unit represented by Chemical Formula 2 and the end group represented by Chemical Formula 5 further comprises Chemical Formula 4, the explanation regarding C1 in Chemical Formula 4 is similarly applied to the definition of C1 defined in Chemical Formula 1. For example, in the polymer comprising the unit represented by Chemical Formula 2, the unit represented by Chemical Formula 4, and the end group represented by Chemical Formula 5, C1 in Chemical Formula 4 is any one of the following structures.

[0180] [ka]

[0181] The above description of C1 is similarly applied to a polymer containing a unit represented by Chemical Formula 2; a unit represented by Chemical Formula 3; a unit represented by Chemical Formula 4; and a terminal group represented by Chemical Formula 5.

[0182] In one embodiment of the present invention, in the polymer comprising the unit represented by Chemical Formula 2 and the end group represented by Chemical Formula 5, the description of E in Chemical Formula 5 is similarly applied to E1 in Chemical Formula 1. For example, in the polymer comprising the unit represented by Chemical Formula 2 and the end group represented by Chemical Formula 5, E is an end-capping unit of the polymer.

[0183] In one embodiment of the present invention, E is a crosslinkable group; or one of the following structures: [ka]

[0184] In the above structure, R40 to R42 are the same or different and each independently represents hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; or a crosslinkable group; L40 is a direct bond; a substituted or unsubstituted alkylene group; or a substituted or unsubstituted arylene group; i1 is an integer from 1 to 10, j1 and j3 are each an integer from 1 to 5, j2 is an integer from 1 to 4, When i1 is 2 or more, two or more L40 are the same or different from each other, When j1 to j3 each represent 2 or more, the substituents in each bracket are the same or different. * indicates a point of attachment within the polymer.

[0185] The above description of E is also applicable to a polymer containing a unit represented by chemical formula 2, a unit represented by chemical formula 3, and a terminal group represented by chemical formula 5. The above description of E is also applicable to a polymer containing a unit represented by chemical formula 2, a unit represented by chemical formula 3, a unit represented by chemical formula 4, and a terminal group represented by chemical formula 5.

[0186] In one embodiment of the invention, the polymer is an alternating, block, or random polymer.

[0187] In one embodiment of the present invention, the formula 1 does not mean that A1, B1, and C1 are arranged in the same order in the polymer. Specifically, the A1, B1, and C1 may be arranged in various orders in the polymer. For example, the polymer may be arranged in the order of 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.

[0188] In addition, the structure of Formula 1 does not mean that A1, B1, and C1 are linked to each other only once in the polymer. For example, the polymer may be linked to each other in various ranges of contents, such as E1-A1-B1-A1-C1-E2, E1-A1-C1-B1-C1-E2, E1-A1-B1-C1-A1-E2, etc. In this case, the ranges of contents of A1, B1, and C1 are determined according to the equivalent ratio of monomers used in the preparation of the polymer.

[0189] In one embodiment of the present invention, the weight average molecular weight (Mw) of the polymer is 25,000 g / mol to 1,000,000 g / mol. Specifically, the weight average molecular weight (Mw) of the polymer is 50,000 g / mol to 500,000 g / mol. More specifically, the weight average molecular weight (Mw) of the polymer is 50,000 g / mol to 140,000 g / mol.

[0190] When the weight-average molecular weight of the polymer falls within the above range, the viscosity is suitable, and the effect of facilitating the production of an ink-jet device and an organic light-emitting device using fine pixels is exhibited.

[0191] In one embodiment of the present invention, the units represented by Chemical Formula 2, the units represented by Chemical Formula 3, the units represented by Chemical Formula 4, and the end groups represented by Chemical Formula 5 may be distributed so as to optimize the properties of the polymer.

[0192] In one embodiment of the present invention, the molar fraction of the unit represented by Chemical Formula 2 in the polymer is a1, the molar fraction of the unit represented by Chemical Formula 3 is b1, the molar fraction of the unit represented by Chemical Formula 4 is c1, and the molar fraction of the unit represented by Chemical Formula 5 is e1. Each of a1, b1, c1, and e1 is a real number and is 0 <a1<1、0≦b1<1、0≦c1<1、0<e1<1であり、a1+b1+c1+e1=1である。

[0193] In one embodiment of the present invention, a1 is a real number equal to or greater than 0.2. In one embodiment of the present invention, a1 is a real number equal to or greater than 0.2 and less than 1. In one embodiment of the present invention, a1 is a real number of 0.2 to 0.9. In one embodiment of the present invention, a1 is a real number of 0.25 to 0.85.

[0194] In one embodiment of the present invention, b1 is a real number equal to or greater than 0. In one embodiment of the present invention, b1 is a real number from 0 to 0.5. In one embodiment of the present invention, b1 is a real number greater than 0 and less than or equal to 0.5. In one embodiment of the present invention, b1 is a real number from 0.1 to 0.4.

[0195] In one embodiment of the present invention, c1 is a real number from 0 to 0.2. In one embodiment of the present invention, c1 is a real number from 0 to 0.1. In one embodiment of the invention, c1 is 0.

[0196] In one embodiment of the present invention, e1 is a real number from 0.1 to 0.5. In one embodiment of the present invention, e1 is a real number from 0.1 to 0.4.

[0197] In one embodiment of the present invention, a1 is a real number equal to or greater than 0.2 and less than 1, b1 is a real number from 0 to 0.5, c1 is a real number from 0 to 0.2, e1 is a real number from 0.1 to 0.5, and a1+b1+c1+e1=1.

[0198] In one embodiment of the present invention, a1 is a real number equal to or greater than 0.2 and less than 1, b1 is a real number greater than 0 and equal to or less than 0.5, c1 is a real number from 0 to 0.2, e1 is a real number from 0.1 to 0.5, and a1+b1+c1+e1=1.

[0199] In one embodiment of the present invention, a1 is a real number from 0.2 to 0.9, b1 is a real number from 0.1 to 0.4, c1 is a real number from 0 to 0.2, e1 is a real number from 0.1 to 0.5, and a1+b1+c1+e1=1.

[0200] In one embodiment of the present invention, a1 is a real number of 0.25 to 0.85, b1 is a real number of 0.1 to 0.4, c1 is a real number of 0 to 0.1, e1 is a real number of 0.1 to 0.4, and a1+b1+c1+e1=1.

[0201] In one embodiment of the invention, the polymer has one of the following structures:

[0202] [ka]

[0203] [ka]

[0204] [ka]

[0205]

change

[0206]

change

[0207]

change

[0208]

change

[0209]

change

[0210]

change

[0211]

change

[0212]

change

[0213]

change

[0214]

change

[0215]

change

[0216]

change

[0217]

change

[0218]

change

[0219]

change

[0220]

change

[0221]

change

[0222]

change

[0223]

change

[0224]

change

[0225]

change

[0226] [Chemistry]

[0227] [Chemistry]

[0228] [Chemistry]

[0229] [Chemistry]

[0230] [Chemistry]

[0231] [Chemistry]

[0232] In the above structure, a1 is a real number where 0 < a1 < 1, b1 is a real number where 0 ≤ b1 < 1, e1 is a real number where 0 < e1 < 1, and a1 + b1 + e1 = 1.

[0233] Specifically, in the above structure, a1 is a real number where 0 < a1 < 1, b1 is a real number where 0 < b1 < 1, e1 is a real number where 0 < e1 < 1, and a1 + b1 + e1 = 1.

[0234] More specifically, in the above structure, a1 is a real number in the range of 0.2 to 0.9, b1 is a real number in the range of 0.1 to 0.5, e1 is a real number in the range of 0.1 to 0.5, and a1 + b1 + e1 = 1.

[0235] More specifically, in the above structure, a1 is a real number in the range of 0.25 to 0.85, b1 is a real number in the range of 0.1 to 0.4, e1 is a real number in the range of 0.1 to 0.4, and a1 + b1 + e1 = 1.

[0236] In the above structure, a1, b1, and e1 are determined according to the equivalent weight of the monomers added during the production of the polymer.

[0237] In one embodiment of the present invention, the polymer may be prepared using known polymerization techniques, such as Suzuki, Yamamoto, Stille, metal-catalyzed C-N coupling reactions, and metal-catalyzed arylation reactions.

[0238] In one embodiment of the present invention, 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 may be substituted by treating a non-deuterated monomer and / or polymer with a deuterated solvent in the presence of a Lewis acid H / D exchange catalyst.

[0239] In one embodiment of the present invention, the molecular weight of the polymer may be controlled by adjusting the ratio of monomers used, and in some embodiments, the molecular weight of the polymer may be controlled using a quenching reaction.

[0240] In one embodiment of the present invention, the polymer may be used as a hole transport material, for example, the polymer may be a hole transporting polymer.

[0241] Furthermore, the polymer according to an embodiment of the present invention can be applied to a hole transport layer of an organic light emitting device to improve the performance and / or life characteristics of the device.

[0242] In one embodiment of the invention, the polymer may be formed into a layer by solution processing. The term "layer" is used interchangeably with the terms "membrane" or "film" and refers to a coating covering a desired area. The term is not limited by size. The area may be as large as the entire element, as small as a specific functional area such as an actual visual display, or as small as a single sub-pixel. Layers and films may be formed by any conventional deposition technique, including vapor 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.

[0243] In one embodiment of the invention, the polymer has an intrinsic viscosity of less than 60 mL / g. This is particularly useful for inkjet printing applications, where the lower viscosity allows more concentrated solutions to be jetted. Specifically, the polymer has an intrinsic viscosity of less than 50 mL / g, more specifically less than 40 mL / g, and even more specifically less than 30 mL / g.

[0244] In one embodiment of the present invention, the intrinsic viscosity of the polymer is 20 mL / g or more and less than 60 mL / g, specifically 20 mL / g to 50 mL / g, more specifically 20 mL / g to 40 mL / g.

[0245] One embodiment of the present invention provides a coating composition comprising the polymer described above.

[0246] In one embodiment of the present invention, the coating composition further comprises a solvent. In one embodiment of the present invention, the coating composition comprises the polymer and a solvent.

[0247] In one embodiment of the present invention, the coating composition may be in a liquid state. The term "liquid" means that the coating composition is in a liquid state at normal temperature and normal pressure.

[0248] In one embodiment of the invention, the solvent preferably does not dissolve the material applied to the underlayer.

[0249] In one embodiment of the present invention, when the coating composition is applied to an organic layer of an organic light-emitting device, a solvent that does not dissolve the material of the lower layer is used. For example, when the coating composition is applied to a hole transport layer, a solvent that does not dissolve the material of the lower layer (first electrode, hole injection layer, etc.) is used. This has the advantage that the hole transport layer can be introduced by solution processing.

[0250] In one embodiment of the invention, the coating composition exhibits improved resistance to solvents during heat treatment after coating.

[0251] For example, if a coating composition is prepared using a solvent that dissolves the polymer and the layer is prepared by solution processing, it will be resistant to the same solvent after heat treatment.

[0252] Therefore, when an organic layer is formed using the polymer and then heat-treated, solution processing is possible when applying another organic layer.

[0253] In one embodiment of the present invention, examples of the solvent contained in the coating composition include chlorine-based solvents such as chloroform, methylene chloride, 1,2-dichloroethane, 1,1,2-trichloroethane, chlorobenzene, and o-dichlorobenzene; ether-based solvents such as tetrahydrofuran and dioxane; aromatic hydrocarbon-based solvents 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; ethylene glycol, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether, and ethylene glycol monomethyl ether. Examples of solvents include polyhydric alcohols and derivatives thereof, such as dimethoxyethane, propylene glycol, diethoxymethane, triethylene glycol monoethyl ether, glycerin, and 1,2-hexanediol; 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 tetralin. However, the solvent is not limited to these, as long as it is capable of dissolving or dispersing the polymer according to one embodiment of the present invention.

[0254] In one embodiment of the present invention, the solvent may be used alone or in combination of two or more kinds.

[0255] In one embodiment of the present invention, the boiling point of the solvent is preferably from 40° C. to 350° C., more preferably from 80° C. to 330° C., but is not limited thereto.

[0256] In one embodiment of the present invention, the concentration of the polymer in the coating composition is preferably 0.1 wt / v% to 20 wt / v%, more preferably 0.5 wt / v% to 10 wt / v%, but is not limited thereto.

[0257] One embodiment of the present invention provides an organic light-emitting device comprising: a first electrode; a second electrode; and one or more organic layers disposed between the first electrode and the second electrode, wherein one or more of the organic layers comprises the polymer.

[0258] The organic layer of the organic light-emitting device of the present invention may have a single-layer structure, or may have a multi-layer structure in which two or more organic layers are laminated. 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 holes and transports holes, a layer that simultaneously injects electrons and transports electrons, etc., as the organic layer. However, the structure of the organic light-emitting device is not limited thereto, and may include a smaller number of organic layers.

[0259] When the organic light emitting device includes a plurality of organic layers, the organic layers may be formed of the same material or different materials.

[0260] In one embodiment of the present invention, the organic light-emitting element includes a first electrode; a second electrode; and an emitting layer provided between the first electrode and the second electrode, and includes a single organic layer between the emitting layer and the first electrode, and the organic layer includes the polymer.

[0261] In one embodiment of the present invention, the organic light-emitting element includes a first electrode; a second electrode; and an emitting layer provided between the first electrode and the second electrode, and includes multiple organic layers between the emitting layer and the first electrode, at least one of the organic layers including the polymer.

[0262] In one embodiment of the present invention, the organic layer containing a polymer is a hole injection layer, a hole transport layer, or a layer which simultaneously injects and transports holes.

[0263] In one embodiment of the present invention, the organic light-emitting element includes a first electrode; a second electrode; and an emitting layer provided between the first electrode and the second electrode, and includes one or more of a hole injection layer, a hole transport layer, and an electron blocking layer between the emitting layer and the first electrode, and one or more of the hole injection layer, the hole transport layer, and the electron blocking layer includes the polymer.

[0264] In one embodiment of the present invention, the organic light-emitting element comprises a first electrode; a second electrode; and an emitting layer provided between the first electrode and the second electrode, and comprises a hole injection layer and a hole transport layer between the first electrode and the emitting layer, and at least one of the hole injection layer and the hole transport layer comprises the polymer.

[0265] In one embodiment of the present invention, the organic light-emitting element has a structure in which a first electrode, a hole injection layer, a hole transport layer, an emission layer, and a second electrode are sequentially provided, and at least one of the hole injection layer and the hole transport layer contains the polymer.

[0266] In one embodiment of the present invention, the organic light-emitting element has a structure in which a first electrode, a hole injection layer, a hole transport layer, an emission layer, and a second electrode are sequentially laminated, and the hole injection layer or the hole transport layer contains the polymer.

[0267] In one embodiment of the present invention, the organic light-emitting device has a structure in which a first electrode, a hole injection layer, a hole transport layer, a light-emitting layer, and a second electrode are laminated in this order, and the hole transport layer contains the polymer.

[0268] In one embodiment of the present invention, the device may further include an additional organic layer between the light-emitting layer and the second electrode.

[0269] In one embodiment of the present invention, the light-emitting device may further include a single organic layer between the light-emitting layer and the second electrode.

[0270] In one embodiment of the present invention, multiple organic 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-injecting layer, an electron-transporting layer, and a layer that simultaneously injects and transports electrons may be further included between the light-emitting layer and the second electrode.

[0271] In one embodiment of the present invention, the organic light-emitting device has a structure in which a first electrode; a hole injection layer; a hole transport layer; an emission layer; an electron injection and transport layer; and a second electrode are sequentially laminated, and at least one of the hole injection layer and the hole transport layer contains the polymer.

[0272] In one embodiment of the present invention, the organic light-emitting device has a structure in which a first electrode; a hole injection layer; a hole transport layer; an emission layer; an electron injection and transport layer; and a second electrode are sequentially laminated, and the hole injection layer or the hole transport layer contains the polymer.

[0273] In one embodiment of the present invention, the organic light-emitting element has a structure in which a first electrode; a hole injection layer; a hole transport layer; an emission layer; an electron injection and transport layer; and a second electrode are sequentially laminated, and the hole transport layer contains the polymer.

[0274] For example, the structure of an organic light-emitting device according to one embodiment of the present invention is illustrated in FIG.

[0275] FIG. 1 illustrates the 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 laminated in this order.

[0276] FIG. 2 illustrates the 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 laminated in this order.

[0277] 1 and 2 are merely examples of the organic light-emitting device, and the structure of the organic light-emitting device of the present invention is not limited to these.

[0278] In one embodiment of the invention, the first electrode is an anode and the second electrode is a cathode.

[0279] In one embodiment, the first electrode is a cathode and the second electrode is an anode.

[0280] In one embodiment, the organic light-emitting device may be a normal type organic light-emitting device having a structure in which an anode, one or more organic layers, and a cathode are laminated in this order on a substrate.

[0281] In one embodiment, the organic light-emitting device may be an inverted type organic light-emitting device in which a cathode, one or more organic layers, and an anode are sequentially laminated on a substrate.

[0282] The organic light-emitting device of the present invention may be laminated in a structure such as the following examples. (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 blocking layer / light emitting layer / electron transport layer / cathode (11) Anode / hole transport layer / electron blocking layer / light emitting layer / electron transport layer / electron injection layer / cathode (12) Anode / hole injection layer / hole transport layer / electron blocking layer / light emitting layer / electron transport layer / cathode (13) Anode / hole injection layer / hole transport layer / electron blocking layer / light emitting layer / electron transport layer / electron injection layer / cathode (14) Anode / hole transport layer / light emitting layer / hole blocking layer / electron transport layer / cathode (15) Anode / hole transport layer / light emitting layer / hole blocking layer / electron transport layer / electron injection layer / cathode (16) Anode / hole injection layer / hole transport layer / light emitting layer / hole blocking layer / electron transport layer / cathode (17) Anode / hole injection layer / hole transport layer / light emitting layer / hole blocking layer / electron transport layer / electron injection layer / cathode (18) Anode / Hole Injection Layer / Hole Transport Layer / Electron Blocking Layer / Emitting Layer / Hole Blocking Layer / Electron Injection and Transport Layer / Cathode

[0283] In the above structure, the "electron transport layer / electron injection layer" may be replaced with an "electron injection and transport layer" or a "layer that simultaneously injects and transports electrons".

[0284] In the above structure, the "hole injection layer / hole transport layer" may be replaced by a "hole injection and transport layer" or a "simultaneous hole injection and transport layer".

[0285] The organic light emitting device of the present invention may be manufactured by materials and methods well known in the art, except that at least one of the organic layers is manufactured to include the polymer. Specifically, the organic light emitting device may be formed by using a coating composition in which at least one of the organic layers includes the polymer.

[0286] For example, the organic light emitting device of the present invention can be fabricated by sequentially stacking an anode, an organic layer, and a cathode on a substrate. In this case, a metal or a conductive metal oxide or an alloy thereof is deposited on a substrate using a physical vapor deposition (PVD) method such as sputtering or e-beam evaporation to form an anode, and an organic layer including a hole injection layer, a hole transport layer, a light emitting layer, and an electron injection and transport layer is formed thereon, and then a material usable as a cathode is deposited thereon. In addition to this method, an organic light emitting device can be fabricated by sequentially depositing a cathode material, an organic layer, and an anode material on a substrate.

[0287] The present specification also provides a method for manufacturing an organic light emitting device formed using the coating composition.

[0288] Specifically, in one embodiment of the present invention, the method includes the steps of: preparing a substrate; forming a first electrode on the substrate; forming one or more organic layers on the first electrode; and forming a second electrode on the organic layers, wherein one or more of the organic layers are formed using the coating composition.

[0289] In one embodiment of the present invention, the organic layer formed using the coating composition is formed using spin coating.

[0290] In another embodiment, the organic layer formed using the coating composition is formed by a printing method.

[0291] In the present invention, the printing method includes, but is not limited to, for example, inkjet printing, nozzle printing, offset printing, transfer printing, or screen printing.

[0292] The coating composition according to one embodiment of the present invention has structural properties that make it suitable for solution processing and can be formed by a printing method, which has the effect of being time- and cost-effective in the manufacture of devices.

[0293] In one embodiment of the present invention, the step of forming an organic layer using the coating composition includes the steps of coating the coating composition on the first electrode; and subjecting the coated coating composition to a heat treatment or a light treatment.

[0294] In one embodiment, the heat treatment time in the heat treatment step may be within 1 hour, specifically within 30 minutes.

[0295] In one embodiment of the present invention, the atmosphere in which the organic layer formed using the coating composition is heat-treated is preferably an inert gas atmosphere such as argon or nitrogen.

[0296] When the organic layer formed using the coating composition includes a heat treatment or light treatment step, the resistance to a solvent is increased, and multiple layers can be formed by repeatedly performing solution deposition and crosslinking methods, and the stability is increased, thereby improving the life characteristics of the device.

[0297] In one embodiment of the present invention, the anode material is preferably a material having a large work function so that hole injection into the organic layer can be facilitated.Specific examples of the anode material that can be used in the present invention include, but are not limited to, metals such as vanadium, chromium, copper, zinc, and gold, or alloys thereof; metal oxides such as zinc oxide, indium oxide, indium tin oxide (ITO), and indium zinc oxide (IZO); combinations of metals and oxides such as ZnO:Al or SnO2:Sb; conductive polymers such as poly(3-methylthiophene), poly[3,4-(ethylene-1,2-dioxy)thiophene] (PEDOT), polypyrrole, and polyaniline.

[0298] In one embodiment of the present invention, the cathode material is preferably a material having a small work function so as to facilitate electron injection into the organic layer. Specific examples of the cathode material include, but are not limited to, metals such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, and lead, or alloys thereof; and materials with a multilayer structure such as LiF / Al or LiO2 / Al.

[0299] In one embodiment of the present invention, the hole injection layer is a layer that injects holes from an electrode. The hole injection material used in the hole injection layer preferably has the ability to transport holes and has an excellent hole injection effect on the anode, anode material, light emitting layer, and / or light emitting material. In addition, the hole injection material is preferably a compound that prevents excitons generated from the light emitting layer from moving to the electron injection layer or electron injection material and has excellent thin film forming ability. In addition, the HOMO (highest occupied molecular orbital) of the hole injection material is preferably between the work function of the anode material and the HOMO of the surrounding organic layer. Specific examples of the hole injection material include, but are not limited to, metal porphyrin, oligothiophene, arylamine-based organic materials, hexanitrile hexaazatriphenylene-based organic materials, quinacridone-based organic materials, perylene-based organic materials, anthraquinone, and polyaniline and polythiophene-based conductive polymers.

[0300] In one embodiment of the present invention, the hole transport layer is a layer that receives holes from the hole injection layer and transports the holes to the light emitting layer. As a hole transport material used in the hole transport layer, a material that can receive holes from the anode or the hole injection layer and move them to the light emitting layer and has high mobility for holes is preferable. In one embodiment of the present invention, the hole transport layer includes the polymer.

[0301] In one embodiment of the present invention, the light-emitting layer includes an organic compound. The organic compound is a material that can emit light in the visible light range by receiving and combining holes and electrons transported from the hole transport layer and the electron transport layer, respectively, and is preferably a material with good quantum efficiency for fluorescence or phosphorescence. Specific examples include, but are not limited to, 8-hydroxy-quinoline aluminum complex (Alq3); carbazole-based compounds; dimerized styryl compounds; BAlq; 10-hydroxybenzoquinoline-metal compounds; benzoxazole, benzothiazole, and benzimidazole-based compounds; poly(p-phenylenevinylene) (PPV)-based polymers; spiro compounds; polyfluorene; and rubrene.

[0302] In one embodiment of the present invention, the light-emitting layer may include a host material and a dopant material. The host material may include a fused aromatic ring derivative or a heterocyclic ring-containing compound. For example, the fused aromatic ring derivative may include an anthracene derivative, a pyrene derivative, a naphthalene derivative, a pentacene derivative, a phenanthrene compound, a fluoranthene compound, and the like, and the heterocyclic ring-containing compound may include, but is not limited to, a carbazole derivative, a dibenzofuran derivative, a ladder-type furan compound, a pyrimidine derivative, and the like. The dopant material may include an aromatic amine derivative, a styrylamine compound, a boron complex, a fluoranthene compound, a metal complex, and the like. For example, the aromatic amine derivative is a fused aromatic ring derivative substituted with a substituted or unsubstituted arylamino group, and includes fluorene, benzofluorene, pyrene, anthracene, chrysene, periflanthene, etc., which are substituted with an arylamino group; the styrylamine compound is a compound in which at least one arylvinyl group is substituted with a substituted or unsubstituted arylamine, and one or more substituents selected from the group consisting of an aryl group, a silyl group, an alkyl group, a cycloalkyl group, and an arylamino group are substituted or unsubstituted.Specifically, the styrylamine compound includes, but is not limited to, styrylamine, styryldiamine, styryltriamine, styryltetraamine, etc.; and the metal complex includes, but is not limited to, an iridium complex, a platinum complex, etc.

[0303] In one embodiment of the present invention, the host material is an anthracene derivative, and the dopant material is a benzofluorene-based compound substituted with an arylamine group. Specifically, the host material is a deuterated anthracene derivative, and the dopant material is a bis(diarylamino)benzofluorene-based compound.

[0304] In one embodiment of the present invention, the light-emitting layer includes quantum dots. For example, the light-emitting layer may include a matrix resin and quantum dots, and the type and content of the quantum dots may be those known in the art.

[0305] In one embodiment of the present invention, the electron transport layer is a layer that receives electrons from the electron injection layer and transports them to the light emitting layer. The electron transport material used in the electron transport layer is a material that can smoothly receive electrons injected from the cathode and transfer them to the light emitting layer, and is preferably a material with high mobility for electrons. Specific examples include, but are not limited to, Al complex of 8-hydroxyquinoline; complexes containing Alq3; organic radical compounds; hydroxyflavone-metal complexes, etc. The electron transport layer may be used with any desired cathode material, as used in the prior art. In particular, examples of suitable cathode materials are conventional materials that have a low work function and are followed by an aluminum or silver layer. Specifically, cesium, barium, calcium, ytterbium, and samarium, each of which is followed by an aluminum or silver layer.

[0306] In one embodiment of the present invention, the electron injection layer is a layer that injects electrons from an electrode, and is preferably a compound that has the ability to transport electrons, has an excellent electron injection effect from the cathode, has an excellent electron injection effect on the light-emitting layer or light-emitting material, prevents the movement of excitons generated from the light-emitting layer to the hole injection layer, and has excellent thin-film forming ability.Specific examples of the compound include, but are not limited to, fluorenone, anthraquinodimethane, diphenoquinone, thiopyran dioxide, oxazole, oxadiazole, triazole, imidazole, perylene tetracarboxylic acid, fluorenylidenemethane, anthrone, bathocuproine (BCP), and derivatives thereof, metal complex compounds, and nitrogen-containing five-membered ring derivatives.

[0307] In one embodiment of the present invention, the metal complex compound may be, but is not limited to, 8-hydroxyquinolinato lithium, bis(8-hydroxyquinolinato) zinc, bis(8-hydroxyquinolinato) copper, bis(8-hydroxyquinolinato) manganese, tris(8-hydroxyquinolinato) aluminum, tris(2-methyl-8-hydroxyquinolinato) aluminum, tris(8-hydroxyquinolinato) gallium, bis(10-hydroxybenzo[h]quinolinato) beryllium, bis(10-hydroxybenzo[h]quinolinato) zinc, bis(2-methyl-8-quinolinato) chlorogallium, bis(2-methyl-8-quinolinato) (o-cresolate) gallium, bis(2-methyl-8-quinolinato) (1-naphtholato) aluminum, bis(2-methyl-8-quinolinato) (2-naphtholato) gallium, etc.

[0308] In one embodiment of the present invention, the hole blocking layer is a layer that blocks holes from reaching the cathode, and may be generally formed under the same conditions as the hole injection layer. Specifically, the hole blocking layer may be made of, but is not limited to, oxadiazole derivatives, triazole derivatives, phenanthroline derivatives, BCP, aluminum complexes, etc.

[0309] In one embodiment of the present invention, a layer adjacent to an organic layer containing the polymer represented by Chemical Formula 1 or the polymer containing a unit represented by Chemical Formula 2 and an end group represented by Chemical Formula 5, for example, a bank layer, contains a compound having fluorine as a substituent.

[0310] For example, when the polymer represented by Formula 1 is contained in a hole transport layer, a bank layer adjacent to the hole transport layer (eg, one or more of a hole injection layer and a light emitting layer) contains fluorine.

[0311] As described above, when a layer adjacent to an organic layer containing the polymer represented by Chemical Formula 1 or the polymer containing the unit represented by Chemical Formula 2 and the end group represented by Chemical Formula 5 contains fluorine, a dipole moment is changed by fluorine, so that a uniform layer can be formed.

[0312] The organic light emitting device according to the present invention may be top-emitting, bottom-emitting or double-sided emitting, depending on the materials used. EXAMPLES

[0313] Hereinafter, the present invention will be described in detail with reference to examples in order to specifically explain the present invention. However, the examples according to the present invention may be modified in various different forms, and the scope of the present application is not to be construed as being limited to the examples described below. The examples of the present application are provided to more completely explain the present specification to those having average knowledge in the art.

[0314] <Synthesis Example> Synthesis Example 1. Preparation of Polymer 1 [ka]

[0315] (1) Preparation of Compound A-1 Compound q-1 (50.0 g, 1.00 eq), compound q-2 (65.2 g, 1.35 eq), potassium carbonate (K2CO3) (78.7 g, 2.5 eq), and bis(tri-tert-butylphosphine)palladium(0) (1.74 g, 0.015 eq) were added to a round-bottom flask equipped with a condenser, and then tetrahydrofuran (THF) (500 mL) and distilled water (300 mL) were added, respectively, and the mixture was heated to 60°C and stirred for 6 hours. After the reaction was terminated by adding distilled water, the mixture was extracted with an organic solvent and concentrated under reduced pressure to produce compound A-1 (50.1 g) in a liquid state.

[0316] (2) Preparation of Compound B-1 In a round-bottom flask equipped with a condenser, compound A-2 (41.0 g, 1.00 eq) and the previously prepared compound A-1 (50.0 g, 3.0 eq) were dissolved in xylene (200 mL). Once completely dissolved, sodium tert-butoxide (40.0 g, 5.00 eq) and bis(tri-tert-butylphosphine)palladium(0) (2.1 g, 0.05 eq) were added and refluxed at 120°C for 3 hours. After injecting distilled water to terminate the reaction, the organic solvent was extracted with ethyl acetate and distilled water, and the mixture was precipitated with toluene and hexane to produce compound B-1 as a white solid.

[0317] (3) Preparation of Compound C-1 In a round-bottom flask equipped with a condenser, the previously prepared compound B-1 (15.1 g, 1.00 eq), 4-bromo-4'-iodo-1,1'-biphenyl (13.16 g, 2.50 eq), and sodium tert-butoxide (7.0 g, 5.00 eq) were dissolved in toluene (200 mL). Once completely dissolved, tris(dibenzylideneacetone)dipalladium(0) (0.67 g, 0.05 eq) and 1,1'-bis(diphenylphosphino)ferrocene (0.81 g, 0.10 eq) were added and refluxed at 90 ° C for 8 hours. After the reaction was terminated by injecting distilled water, the organic solvent was extracted with ethyl acetate and distilled water, and compound C-1 with a purity of 99.7% was produced by column chromatography.

[0318] (4) Preparation of Compound D-1 In a round-bottom flask equipped with a condenser, 10.00 g (1.00 eq) of the compound C-1 previously prepared, 14 g (2.00 eq) of bis(pinacolato)diboron, and 1.60 g (3.00 eq) of potassium tert-butoxide were dissolved in 200 mL of toluene. Once completely dissolved, 0.20 g (0.04 eq) of [1,1'-Bis(diphenylphosphino)ferrocene]dichloropalladium(II)(Pd(dppf)) was added and refluxed at 90°C for 8 hours. After the reaction was terminated with DI water (deionized water), the organic solvent was extracted with ethyl acetate and distilled water, and compound D-1 with a purity of 99.3% was produced by column chromatography.

[0319] (5) Preparation of Polymer 1 [ka]

[0320] Compound D-1 (0.765 mmol), 4,4″-dibromo-5′-(4-bromophenyl)-1,1′:3′,1″-terphenyl (0.158 mmol), and 4-bromo-4′-propyl-1,1′-biphenyl (0.369 mmol) were placed in a round-bottom flask and dissolved in toluene (11 mL) to prepare a first solution.

[0321] A 50 mL Schlenk tube was charged with bis(1,5-cyclooctadiene)nickel(0) (2.42 mmol). 2,2'-dipyridyl (2.42 mmol) and 1,5-cyclooctadiene (2.42 mmol) were charged to a scintillation vial and then dissolved in N,N'-dimethylformamide (5.5 mL) and toluene (11 mL) to prepare a second solution.

[0322] The second solution was added to a Schlenk flask and stirred at 50°C for 30 minutes. The first solution was further added to a Schlenk flask and stirred at 50°C for 3 hours. HCl and methanol (methanol:HCl = 95:5 (v:v)) were slowly added dropwise to terminate the reaction, and the mixture was stirred for 45 minutes, and the resulting solid was filtered. The dried solid was dissolved in toluene (1% wt / v) and purified by passing through a column containing silica gel and basic aluminum oxide (6 g each). The obtained toluene solution was triturated with acetone to produce polymer 1.

[0323] Synthesis Example 2: Preparation of Polymer 2 [ka]

[0324] Polymer 2 was produced in the same manner as in Synthesis Example 1, except that in (5) of Synthesis Example 1, 3,3″-dibromo-5′-(3-bromophenyl)-1,1′:3′,1″-terphenyl was used instead of 4,4″-dibromo-5′-(4-bromophenyl)-1,1′:3′,1″-terphenyl.

[0325] Synthesis Example 3: Preparation of Polymer 3 [ka]

[0326] Polymer 3 was produced in the same manner as in Synthesis Example 1, except that 1,3,5-tribromobenzene was used instead of 4,4″-dibromo-5′-(4-bromophenyl)-1,1′:3′,1″-terphenyl in Synthesis Example 1 (5).

[0327] Synthesis Example 4: Preparation of Polymer 4 [ka]

[0328] Polymer 4 was produced in the same manner as in Synthesis Example 1, except that in (5) of Synthesis Example 1, tris(4-bromophenyl)(phenyl)silane was used instead of 4,4″-dibromo-5′-(4-bromophenyl)-1,1′:3′,1″-terphenyl.

[0329] Synthesis Example 5. Preparation of Polymer 5 [ka]

[0330] Polymer 5 was produced in the same manner as in Synthesis Example 1, except that tetrakis(4-bromophenyl)silane was used instead of 4,4″-dibromo-5′-(4-bromophenyl)-1,1′:3′,1″-terphenyl in (5) of Synthesis Example 1.

[0331] Synthesis Example 6: Preparation of Polymer 6 [ka]

[0332] Polymer 6 was produced in the same manner as in Synthesis Example 1, except that in Synthesis Example 1(5), compound D-2 was used instead of compound D-1.

[0333] Synthesis Example 7: Preparation of Polymer 7 [ka]

[0334] Synthesis Example 2 The same procedure as in Synthesis Example 1 was repeated except that compound D-2 was used instead of compound D-1. 2 Polymer 7 was produced in the same manner as in the production method of Polymer 1.

[0335] Synthesis Example 8: Preparation of Polymer 8 [ka]

[0336] Synthesis Example 3 The same procedure as in Synthesis Example 1 was repeated except that compound D-2 was used instead of compound D-1. 3 Polymer 8 was produced in the same manner as in the production method of Polymer 8.

[0337] Synthesis Example 9: Preparation of Polymer 9 [ka]

[0338] Synthesis Example 4 The same procedure as in Synthesis Example 1 was repeated except that compound D-2 was used instead of compound D-1. 4 Polymer 9 was produced in the same manner as in the production method of Polymer 1.

[0339] Synthesis Example 10. Preparation of Polymer 10 [ka]

[0340] Synthesis Example 5 The same procedure as in Synthesis Example 1 was repeated except that compound D-2 was used instead of compound D-1. 5 Polymer 10 was produced in the same manner as in the production method of the above.

[0341] <Experimental Example 1> Measurement of molecular weight Experimental Example 1-1 The number average molecular weight (Mn), weight average molecular weight (Mw), and molecular weight distribution (PDI) of Polymer 1 produced in Synthesis Example 1 were measured using GPC (Agilent, PLgel HFIPGEL column). The molecular weight distribution was calculated according to the following formula (1). Formula (1): PDI=weight average molecular weight (Mw) / number average molecular weight (Mn)

[0342] Experimental Examples 1-2 to 1-10 The number average molecular weight (Mn), weight average molecular weight (Mw), and molecular weight distribution (PDI) were measured in the same manner as in Experimental Example 1-1, except that the polymer in Table 1 below was used instead of Polymer 1 in Experimental Example 1-1.

[0343] Comparative Example 1-1 In the above Experimental Example 1-1, the polymer 1 The number average molecular weight (Mn), weight average molecular weight (Mw) and molecular weight distribution (PDI) were measured in the same manner as in Experimental Example 1-1, except that Polymer Q was used instead of Polymer 1.

[0344] The structure of the polymer Q used in Comparative Example 1-1 is as follows. [ka]

[0345] The GPC results measured in Experimental Examples 1-1 to 1-10 and Comparative Example 1-1 are shown in Table 1 below.

[0346] [Table 1]

[0347] Experimental Example 2. Manufacturing of organic light-emitting device Experimental Example 2-1 (1) Material As the dopant, a bis(diarylamino)benzofluorene compound described in US Pat. No. 8,465,848 B2 was used. The HIL used was a material described in U.S. Patent No. 7,351,358 B2, specifically a hole-injecting material made from an aqueous dispersion of a conductive polymer and a polymeric fluorinated sulfonic acid. As the host, a deuterated anthracene compound described in WO 2011-028216A1 was used.

[0348] (2) Fabrication of the element A glass substrate coated with a 1,500 Å-thick thin film of ITO (indium tin oxide) was placed in distilled water containing a detergent and ultrasonically cleaned. The detergent used was from Fischer Co., and the distilled water was distilled water that had been filtered a second time with a Millipore Co. filter. The ITO was washed for 30 minutes, and then ultrasonically cleaned twice with distilled water for 10 minutes. After the distilled water cleaning was completed, the substrate was ultrasonically cleaned with a solvent of isopropyl alcohol and acetone, dried, and then washed for 5 minutes and dried.

[0349] Immediately before the fabrication of the device, the washed and patterned ITO was treated with UV ozone for 10 minutes. After the ozone treatment, an aqueous dispersion of HIL was spin-coated on the ITO surface, and the solvent was removed by heat treatment to form a hole injection layer with a thickness of about 40 nm. On the hole injection layer formed above, a toluene solution in which 1.5 wt% of the polymer 1 prepared in Synthesis Example 1 was dissolved was spin-coated, and the solvent was removed by heat treatment to form a hole transport layer with a thickness of about 100 nm. On the hole transport layer, a methyl benzoate solution in which a host and a dopant (host:dopant=93:7 (wt%)) were dissolved at a concentration of 2.0 wt% was spin-coated to form a light-emitting layer with a thickness of about 100 nm. After that, it was transferred to a vacuum deposition machine, and BCP was vacuum-deposited on the light-emitting layer to a thickness of 35 nm to form an electron injection and transport layer. LiF was sequentially deposited to a thickness of 1 nm and aluminum was deposited to a thickness of 100 nm on the electron injection and transport layer to form a cathode.

[0350] In the above process, the deposition rate of lithium fluoride in the cathode was maintained at 0.3 Å / sec, and that of aluminum at 2 Å / sec. The degree of vacuum during deposition was 2×10 -7 torr~5×10 -6 torr was maintained.

[0351] Experimental Examples 2-2 to 2-10 The same procedure was repeated except that the polymer in Table 2 below was used instead of the polymer 1 in the above Experimental Example 2-1.2-1 An organic light-emitting device was manufactured in the same manner as in the above.

[0352] Comparative Example 2-1 An organic light emitting device was manufactured in the same manner as in Experimental Example 2-1, except that the polymer in Table 2 below was used instead of Polymer 1 in Experimental Example 2-1.

[0353] The organic light-emitting devices manufactured in Experimental Examples 2-1 to 2-10 and Comparative Example 2-1 were subjected to a current of 10 mA / cm 2 The performance was measured at a current density of 100 Ω / s, and the results are shown in Table 2 below.

[0354] In Table 2 below, the external quantum efficiency is calculated by (number of photons emitted) / (number of charge carriers injected), and the color coordinates below are x and y coordinates according to the CIE chromaticity diagram (Commission Internationale de L'Eclairage, 1931), where CE / CIEy is the luminous efficiency (cd / A) divided by the color coordinate (y) value.

[0355] [Table 2]

[0356] As shown in Table 2, it was confirmed that the organic light-emitting devices using the polymer containing a branched alkyl group according to the present invention (Experimental Examples 2-1 to 2-10) had lower driving voltages and improved efficiency compared to the organic light-emitting device using the polymer containing a linear alkyl group (Comparative Example 2-1).

[0357] Experimental Example 3. Measurement of life and driving stability

[0358] The organic light emitting devices prepared in Experimental Example 2-1 and Comparative Example 2-1 were stored at room temperature for 1000 nits, and their stability was measured.

[0359] When comparing the time (T95) required for the luminance to decrease by 95% from the initial luminance, it was confirmed that the organic light emitting device prepared in Experimental Example 2-1 took more than twice as long as the organic light emitting device prepared in Comparative Example 2-1. This means that it took a longer time for the luminance to decrease in Experimental Example 2-1 than in Comparative Example 2-1, and therefore it was confirmed that the organic light emitting device prepared in Experimental Example 2-1 has better long-term stability (lifetime) than the organic light emitting device of Comparative Example 2-1.

[0360] In addition, the progressive driving voltage of the organic light emitting device manufactured in Experimental Example 2-1 and the organic light emitting device manufactured in Comparative Example 2-1 was measured. As time passed, the voltage to be injected to generate the same light as the initial light increased in the device of Comparative Example 2-1, whereas the device of Experimental Example 2-1 realized a constant light even when a low voltage was injected as in the initial state. Specifically, the device manufactured in Comparative Example 2-1 did not generate the same light as the initial light unless a voltage of 0.2V or more was injected as time passed, whereas the device manufactured in Experimental Example 2-1 generated the same light as the initial light even when a voltage of less than 0.1V was injected at the same time as the voltage of 0.2V or more was injected in Comparative Example 2-1. That is, it was confirmed that the progressive driving voltage stability of the organic light emitting device manufactured in Experimental Example 2-1 was improved compared to the progressive driving voltage stability of the organic light emitting device manufactured in Comparative Example 2-1.

[0361] In the case of a progressive driving voltage, the more uniform the thin film is formed, the more stable it is. From the above experimental results, it can be predicted that the polymer used in Experimental Example 2-1 formed a uniform thin film due to improved solubility compared to the polymer used in Comparative Example 2-1, and thus the progressive driving voltage was stable. Although a preferred embodiment (hole transport layer) of the present invention has been described above, the present invention is not limited thereto and can be implemented in various modified forms within the scope of the claims and the detailed description of the invention, which also belong to the scope of the invention. [Explanation of symbols]

[0362] 1. Circuit Board 2 Anode 3. Emitting layer 4 ···Cathode 5. Hole injection layer 6. Hole transport layer 7. Electron injection and transport layer

Claims

1. A polymer represented by the following chemical formula 1: 【Chemistry 1】 In the above Chemical Formula 1, A1 is represented by the following chemical formula 2: B1 is represented by the following chemical formula 3: C1 is a substituted or unsubstituted arylene group; or a substituted or unsubstituted divalent heterocyclic group; E1 and E2 are the same or different and each independently represents hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted siloxane group; a crosslinkable group; or a combination thereof; a, b, and c are each a mole fraction; a is a real number in the range of 0<a≦1, b is a real number in the range of 0≦b<1, c is a real number in the range of 0≦c<1, a+b+c is 1, 【Chemistry 2】 In the above Chemical Formula 2, Ar1, Ar2, L1, and L2 are the same or different and each independently represents a substituted or unsubstituted arylene group; R1 to R3 are the same or different and each independently represents hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group; R10 to R13 are the same or different and each independently represents a substituted or unsubstituted alkyl group; n1 to n3 each represent an integer from 1 to 4, When n1 to n3 each represent 2 or more, the substituents in each bracket are the same or different. l1 and l2 each represent an integer from 1 to 5; When l1 and l2 are each 2 or more, the structures in the respective brackets are the same or different from each other, * denotes a bond point within the polymer, 【Chemistry 3】 In the above Chemical Formula 3, m is an integer of 3 or 4; When m is 3, Z is CRa; SiRa; N; or a trivalent substituted or unsubstituted aryl group; When m is 4, Z is C; Si; or a tetravalent substituted or unsubstituted 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 trivalent or tetravalent substituted or unsubstituted aryl group; * denotes attachment points within the polymer.

2. The polymer according to claim 1 , wherein E 1 and E 2 are the same or different and each independently represents a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a crosslinkable group; or a combination thereof.

3. The polymer according to claim 1, wherein E1 and E2 are the same or different and each independently represent a crosslinkable group; or any one of the following structures: 【Chemistry 4】 In the above structure, R40 to R42 are the same or different and each independently represents hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; or a crosslinkable group; L40 is a direct bond; a substituted or unsubstituted alkylene group; or a substituted or unsubstituted arylene group; i1 is an integer from 1 to 10, j1 and j3 each represent an integer from 1 to 5; j2 is an integer from 1 to 4, when i1 is 2 or more, two or more L40 are the same or different; When j1 to j3 each represent 2 or more, the substituents in each bracket are the same or different. * denotes attachment points within the polymer.

4. A unit represented by the following chemical formula 2: A polymer having an end group represented by the following chemical formula 5: 【Chemistry 5】 In the above Chemical Formulas 2 and 5, Ar1, Ar2, L1, and L2 are the same or different and each independently represents a substituted or unsubstituted arylene group; R1 to R3 are the same or different and each independently represents hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group; R10 to R13 are the same or different and each independently represents a substituted or unsubstituted alkyl group; n1 to n3 each represent an integer from 1 to 4, When n1 to n3 each represent 2 or more, the substituents in each bracket are the same or different. l1 and l2 each represent an integer from 1 to 5; When l1 and l2 are each 2 or more, the structures in the respective brackets are the same or different from each other, E is hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted siloxane group; a crosslinkable group; or a combination thereof; * denotes attachment points within the polymer.

5. The polymer according to claim 4, further comprising a unit represented by the following formula 3: 【Chemistry 6】 In the above Chemical Formula 3, m is an integer of 3 or 4; When m is 3, Z is CRa; SiRa; N; or a trivalent substituted or unsubstituted aryl group; When m is 4, Z is C; Si; or a tetravalent substituted or unsubstituted 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 trivalent or tetravalent substituted or unsubstituted aryl group; * denotes attachment points within the polymer.

6. The polymer according to claim 4, further comprising a unit represented by the following formula 4: 【Chemistry 7】 In the above Chemical Formula 4, C1 is a substituted or unsubstituted arylene group; or a substituted or unsubstituted divalent heterocyclic group; * denotes attachment points within the polymer.

7. The polymer of claim 4, wherein E is a crosslinkable group; or one of the following structures: 【Chemistry 8】 In the above structure, R40 to R42 are the same or different and each independently represents hydrogen; deuterium; a substituted or unsubstituted alkyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; or a crosslinkable group; L40 is a direct bond; a substituted or unsubstituted alkylene group; or a substituted or unsubstituted arylene group; i1 is an integer from 1 to 10, j1 and j3 each represent an integer from 1 to 5; j2 is an integer from 1 to 4, when i1 is 2 or more, two or more L40 are the same or different; When j1 to j3 each represent 2 or more, the substituents in each bracket are the same or different. * denotes attachment points within the polymer.

8. The polymer according to any one of claims 1 to 7, wherein the chemical formula 2 is represented by the following chemical formula 2-1: 【Chemistry 9】 In the above Chemical Formula 2-1, R1 to R3, R10 to R13, Ar1, Ar2, and n1 to n3 are the same as defined in Chemical Formula 2. L3 and L4 are the same or different and each independently represent a direct bond; or a substituted or unsubstituted arylene group; R15 and R16 are the same or different, and each independently represents hydrogen; deuterium; a halogen group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; a substituted or unsubstituted arylamine group; or a substituted or unsubstituted siloxane group; n15 and n16 each represent an integer of 1 to 4, When n15 and n16 are each 2 or more, the substituents in each bracket are the same or different. l3 and l4 each represent an integer from 1 to 4; When l3 and l4 are each 2 or more, the structures in the respective brackets are the same or different from each other, * denotes attachment points within the polymer.

9. The polymer according to any one of claims 1, 2, 3, and 5, wherein the chemical formula 3 is represented by any one of the following chemical formulas 3-1 to 3-4: 【Chemistry 10】 【Chemistry 11】 In the above Chemical Formulas 3-1 to 3-4, Z1 is CRa; SiRa; N; or a trivalent substituted or unsubstituted aryl group; Z2 and Z3 are the same or different and each independently represents C; Si; or a tetravalent substituted or unsubstituted aryl group; L10 is a direct bond; or a substituted or unsubstituted arylene group; Ra is hydrogen; deuterium; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group; R20 to R30 are the same or different and each independently represents hydrogen; deuterium; a halogen group; a 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; a substituted or unsubstituted aryl group; a substituted or unsubstituted heterocyclic group; or a crosslinkable group, and adjacent groups may be bonded to each other to form a ring; k1 is an integer from 1 to 4, k2 is an integer from 1 to 5, When k1 is 2 or more, the substituents in the brackets are the same or different from each other, When k2 is 2 or more, the substituents in the brackets are the same or different from each other, * denotes attachment points within the polymer.

10. The polymer according to any one of claims 1 to 7, wherein the polymer has one of the following structures: 【Chemistry 12】 【Chemistry 13】 【Chemistry 14】 【Chemistry 15】 【Chemistry 16】 【Chemistry 17】 【Chemistry 18】 【Chemistry 19】 【Chemistry 20】 【Chemistry 21】 【Chemical 22】 【Chemistry 23】 【Chemistry 24】 【Chemistry 25】 【Chemistry 26】 【Chemical 27】 【Chemistry 28】 【Chemical 29】 【Chemistry 30】 【Chemistry 31】 【Chemistry 32】 【Chemical 33】 【Chemical 34】 【Chemistry 35】 【Chemical 36】 【Chemical 37】 【Chemical Formula 38】 【Chemical Formula 39】 【Chemistry 40】 【Chemistry 41】 In the above structure, a1 is a real number in the range of 0<a1<1, b1 is a real number in the range of 0≦b1<1, e1 is a real number in the range of 0<e1<1, and a1+b1+e1 is 1.

11. first electrode; A second electrode; and One or more organic layers provided between the first electrode and the second electrode. Including, An organic light-emitting device, wherein at least one of the organic layers comprises the polymer according to any one of claims 1 to 7.

12. The organic light-emitting device according to claim 11, wherein the polymer-containing organic layer is a hole injection layer, a hole transport layer, or a layer that simultaneously injects and transports holes.

Images