Patent Application
20230331654
The present invention relates to a compound for an organic electronic element, an organic electronic element using the same, and an electronic device thereof.
In general, organic light emitting phenomenon refers to a phenomenon that converts electric energy into light energy by using an organic material. An organic electronic element using an organic light emitting phenomenon usually has a structure including an anode, a cathode, and an organic material layer interposed therebetween. Here, in order to increase the efficiency and stability of the organic electronic element, the organic material layer is often composed of a multi-layered structure composed of different materials, and for example, may include a hole injection layer, a hole transport layer, an emitting layer, an electron transport layer, an electron injection layer and the like.
A material used as an organic material layer in an organic electronic element may be classified into a light emitting material and a charge transport material, such as a hole injection material, a hole transport material, an electron transport material, an electron injection material and the like depending on its function.
Lifespan and efficiency are the most problematic in organic electroluminescent device, and as displays become larger, these problems of efficiency and lifespan must be solved. Efficiency, lifespan, and driving voltage are related to each other, and when the efficiency is increased, the driving voltage is relatively decreased, and as the driving voltage is decreased, crystallization of the organic material due to Joule heating generated during driving decreases, and as a result, the lifespan tends to increase.
However, the efficiency cannot be maximized simply by improving the organic material layer. This is because, when the energy level and T1 value between each organic material layer, and the intrinsic properties of the material (mobility, interfacial properties, etc.) are optimally combined, a long lifespan and high efficiency can be achieved at the same time.
Also, in order to solve the problem of light emission in the hole transport layer in recent organic electroluminescent devices, an emitting-auxiliary layer must exist between the hole transport layer and the emitting layer, and it is time to develop different emitting-auxiliary layers according to each emitting layer (R, G, B).
In general, electrons are transferred from the electron transport layer to the emitting layer, and holes are transferred from the hole transport layer to the emitting layer, and excitons are generated by recombination.
However, since the material used for the hole transport layer should have a low HOMO value, most have a low T1 value. As a result, excitons generated in the emitting layer are transferred to the hole transport layer, resulting in charge unbalance in the emitting layer to emit light at the hole transport layer interface.
When light is emitted at the hole transport layer interface, the color purity and efficiency of the organic electronic element are lowered, and the lifespan is shortened. Therefore, it is urgently required to develop an emitting-auxiliary layer having a high T1 value and having a HOMO level between the HOMO energy level of the hole transport layer and the HOMO energy level of the emitting layer.
Furthermore, it is necessary to develop a hole injection layer material that delays the penetration and diffusion of metal oxides from the anode electrode (ITO) into the organic layer, which is one of the causes of shortening the lifespan of organic electronic element, and that has stable characteristics, that is, a high glass transition temperature, even against Joule heating generated during device driving. The low glass transition temperature of the hole transport layer material has a characteristic of lowering the uniformity of the thin film surface during device driving, which is reported to have a significant effect on device lifespan. Moreover, OLED devices are mainly formed by a deposition method, and it is necessary to develop a material that can withstand a long time during deposition, that is, a material with strong heat resistance.
In other words, in order to fully exhibit the excellent characteristics of an organic electronic element, it should be preceded that the material constituting the organic material layer in the device, such as a hole injection material, a hole transport material, a light emitting material, an electron transport material, an electron injection material, emitting auxiliary layer material, etc., is supported by a stable and efficient material, but the development of a stable and efficient organic material layer material for an organic electronic device has not yet been sufficiently made. Therefore, the development of new materials is continuously required.
As a reference prior art document, KR1020130076842 A was used.
In order to solve the problems of the above-mentioned background art, the present invention has revealed a compound having a novel structure, and when this compound is applied to an organic electronic element, it has been found that the luminous efficiency, stability and lifespan of the device can be significantly improved.
Accordingly, an object of the present invention is to provide a novel compound, an organic electronic element using the same, and an electronic device thereof.
The present invention provides a compound represented by Formula (1).
In another aspect, the present invention provides an organic electronic element comprising the compound represented by Formula (1) and an electronic device thereof.
By using the compound according to the present invention, high luminous efficiency, low driving voltage and high heat resistance of the device can be achieved, and color purity and lifespan of the device can be greatly improved.
Hereinafter, some embodiments of the present invention will be described in detail. Further, in the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
In addition, terms, such as first, second, A, B, (a), (b) or the like may be used herein when describing components of the present invention. Each of these terminologies is not used to define an essence, order or sequence of a corresponding component but used merely to distinguish the corresponding component from other component(s). It should be noted that if a component is described as being “connected”, “coupled”, or “connected” to another component, the component may be directly connected or connected to the other component, but another component may be “connected”, “coupled” or “connected” between each component.
As used in the specification and the accompanying claims, unless otherwise stated, the following is the meaning of the term as follows.
Unless otherwise stated, the term “halo” or “halogen”, as used herein, includes fluorine, bromine, chlorine, or iodine.
Unless otherwise stated, the term “alkyl” or “alkyl group”, as used herein, has a single bond of 1 to 60 carbon atoms, and means saturated aliphatic functional radicals including a linear alkyl group, a branched chain alkyl group, a cycloalkyl group (alicyclic), an cycloalkyl group substituted with a alkyl or an alkyl group substituted with a cycloalkyl.
Unless otherwise stated, the term “alkenyl” or “alkynyl”, as used herein, has double or triple bonds of 2 to 60 carbon atoms, but is not limited thereto, and includes a linear or a branched chain group.
Unless otherwise stated, the term “cycloalkyl”, as used herein, means alkyl forming a ring having 3 to 60 carbon atoms, but is not limited thereto.
Unless otherwise stated, the term “alkoxyl group”, “alkoxy group” or “alkyloxy group”, as used herein, means an oxygen radical attached to an alkyl group, but is not limited thereto, and has 1 to 60 carbon atoms.
Unless otherwise stated, the term “aryloxyl group” or “aryloxy group”, as used herein, means an oxygen radical attached to an aryl group, but is not limited thereto, and has 6 to 60 carbon atoms.
The terms “aryl group” and “arylene group” used in the present invention have 6 to 60 carbon atoms, respectively, unless otherwise specified, but are not limited thereto. In the present invention, an aryl group or an arylene group means a single ring or multiple ring aromatic, and includes an aromatic ring formed by an adjacent substituent joining or participating in a reaction.
For example, the aryl group may be a phenyl group, a biphenyl group, a fluorene group, or a spirofluorene group.
The prefix “aryl” or “ar” means a radical substituted with an aryl group. For example, an arylalkyl may be an alkyl substituted with an aryl, and an arylalkenyl may be an alkenyl substituted with aryl, and a radical substituted with an aryl has a number of carbon atoms as defined herein.
Also, when prefixes are named subsequently, it means that substituents are listed in the order described first. For example, an arylalkoxy means an alkoxy substituted with an aryl, an alkoxylcarbonyl means a carbonyl substituted with an alkoxyl, and an arylcarbonylalkenyl also means an alkenyl substituted with an arylcarbonyl, wherein the arylcarbonyl may be a carbonyl substituted with an aryl.
Unless otherwise stated, the term “heterocyclic group”, as used herein, contains one or more heteroatoms, but is not limited thereto, has 2 to 60 carbon atoms, includes any one of a single ring or multiple ring, and may include heteroaliphadic ring and heteroaromatic ring. Also, the heterocyclic group may also be formed in conjunction with an adjacent group.
Unless otherwise stated, the term “heteroatom”, as used herein, represents at least one of N, O, S, P, or Si.
Also, the term “heterocyclic group” may include a ring including SO2 instead of carbon consisting of cycle. For example, “heterocyclic group” includes the following compound.
Unless otherwise stated, the term “fluorenyl group” or “fluorenylene group”, as used herein, means a monovalent or divalent functional group, in which R, R′ and R″ are all hydrogen in the following structures, and the term “substituted fluorenyl group” or “substituted fluorenylene group” means that at least one of the substituents R, R′, R″ is a substituent other than hydrogen, and include those in which R and R′ are bonded to each other to form a spiro compound together with the carbon to which they are bonded.
The term “spiro compound”, as used herein, has a ‘spiro union’, and a spiro union means a connection in which two rings share only one atom. At this time, atoms shared in the two rings are called ‘spiro atoms’, and these compounds are called ‘monospiro-’, ‘di-spiro’ and ‘tri-spiro’, respectively, depending on the number of spiro atoms in a compound.
Unless otherwise stated, the term “aliphatic”, as used herein, means an aliphatic hydrocarbon having 1 to 60 carbon atoms, and the term “aliphatic ring”, as used herein, means an aliphatic hydrocarbon ring having 3 to 60 carbon atoms.
Unless otherwise stated, the term “ring”, as used herein, means an aliphatic ring having 3 to 60 carbon atoms, or an aromatic ring having 6 to 60 carbon atoms, or a hetero ring having 2 to 60 carbon atoms, or a fused ring formed by the combination of them, and includes a saturated or unsaturated ring.
Other hetero compounds or hetero radicals other than the above-mentioned hetero compounds include, but are not limited thereto, one or more heteroatoms.
Also, unless expressly stated, as used herein, “substituted” in the term “substituted or unsubstituted” means substituted with one or more substituents selected from the group consisting of deuterium, halogen, an amino group, a nitrile group, a nitro group, a C1-C20 alkyl group, a C1-C20 alkoxyl group, a C1-C20 alkylamine group, a C1-C20 alkylthiopen group, a C6-C20 arylthiopen group, a C2-C20 alkenyl group, a C2-C20 alkynyl group, a C3-C20 cycloalkyl group, a C6-C20 aryl group, a C6-C20 aryl group substituted by deuterium, a C8-C20 arylalkenyl group, a silane group, a boron group, a germanium group, and a C2-C20 heterocyclic group, but is not limited to these substituents.
Also, unless there is an explicit explanation, the formula used in the present invention is the same as the definition of the substituent by the exponent definition of the following formula.
Here, when a is an integer of 0, the substituent R1 is absent, when a is an integer of 1, the sole substituent R1 is linked to any one of the carbon constituting the benzene ring, when a is an integer of 2 or 3, each is bonded as follows, where R1 may be the same or different from each other, when a is an integer of 4 to 6, it is bonded to the carbon of the benzene ring in a similar manner, while the indication of the hydrogen bonded to the carbon forming the benzene ring is omitted.
Hereinafter, a compound according to an aspect of the present invention and an organic electronic element including the same will be described.
The present invention provides a compound represented by Formula (1).
{In Formula (1), each symbol may be defined as follows.
1) R1, R2, R3, R4, A and B are each independently selected from the group consisting of hydrogen; deuterium; halogen; a C1-C60 alkyl group; a C2-C60 alkenyl group; a C2-C60 alkynyl group; a C1-C60 alkoxyl group; a C6-C60 aryloxy group; a C6-C60 aryl group; fluorenyl group; a C2-C60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring; and C6-C60 arylamine group; or in case a, b, c and d are 2 or more, R1, R2, R3 and R4 are each in plural being the same or different, a plurality of adjacent R1s, or a plurality of R2s, or a plurality of R3s, or a plurality of R4s may be bonded to each other to form a ring.
Wherein in case R1, R2, R3, R4, A and B are an alkyl group, it may be preferably a C1-C30 alkyl group, and more preferably a C1-C24 alkyl group.
In case R1, R2, R3, R4, A and B are an alkenyl group, they may be preferably an C2-C30 alkenyl group, more preferably an C2-C24 alkenyl group.
In case R1, R2, R3, R4, A and B are an alkynyl group, they may be preferably an C2-C30 alkynyl group, more preferably an C2-C24 alkynyl group.
In case R1, R2, R3, R4, A and B are an alkoxyl group, it may be preferably a C1-C30 alkoxyl group, more preferably an C1-C24 alkoxyl group.
In case R1, R2, R3, R4, A and B are an aryloxy group, it may be preferably a C6-C30 aryloxy group, more preferably an C6-C24 aryloxy group.
In case R1, R2, R3, R4, A and B are an aryl group, it may be preferably a C6-C30 aryl group, and more preferably a C6-C25 aryl group, for example, it may be phenylene, biphenyl, naphthalene, terphenyl, etc.
In case R1, R2, R3, R4, A and B are a heterocyclic group, it may be preferably a C2-C30 heterocyclic group, and more preferably a C2-C24 heterocyclic group, for example, it may be pyrazine, thiophene, pyridine, pyrimidoindole, 5-phenyl-5H-pyrimido[5,4-b]indole, quinazoline, benzoquinazoline, carbazole, dibenzoquinazoline, dibenzofuran, dibenzothiophene, benzothienopyrimidine, benzofuropyrimidine, phenothiazine, phenylphenothiazine, etc.
In case R1, R2, R3, R4, A and B are a fused ring group, it may be preferably a fused ring group of a C3-C30 aliphatic ring and a C6-C30 aromatic ring, more preferably a fused ring group of a C3-C24 aliphatic ring and a C6-C24 aromatic ring.
In case R1, R2, R3, R4, A and B are an arylamine group, it may be preferably a C6-C30 arylamine group, and more preferably a C6-C24 arylamine group,
2) However, at least one of A and B is a substituent represented by Formula (A),
3) a is an integer from 0 to 3, b, c and d are each independently an integer from 0 to 4,
4) Ar1 is selected from the group consisting of a C1-C60 alkyl group; a C2-C20 alkenyl group; a C2-C20 alkynyl group; a C1-C30 alkoxyl group; a C6-C30 aryloxy group; a C6-C60 aryl group; fluorenyl group; a C2-C60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring;
Wherein in case Ar1 is an alkyl group, it may be preferably a C1-C30 alkyl group, and more preferably a C1-C24 alkyl group.
In case Ar1 is an alkoxyl group, it may be preferably an C1-C24 alkoxyl group.
In case Ar1 is an aryloxy group, it may be preferably a C6-C24 aryloxy group.
In case Ar1 is an aryl group, it may be preferably a C6-C30 aryl group, and more preferably a C6-C25 aryl group, for example, it may be phenylene, biphenyl, naphthalene, terphenyl, etc.
In case Ar1 is a heterocyclic group, it may be preferably a C2-C30 heterocyclic group, and more preferably a C2-C24 heterocyclic group, for example, it may be pyrazine, thiophene, pyridine, pyrimidoindole, 5-phenyl-5H-pyrimido[5,4-b]indole, quinazoline, benzoquinazoline, carbazole, dibenzoquinazoline, dibenzofuran, dibenzothiophene, benzothienopyrimidine, benzofuropyrimidine, phenothiazine, phenylphenothiazine, etc.
In case Ar1 is a fused ring group, it may be preferably a fused ring group of a C3-C30 aliphatic ring and a C6-C30 aromatic ring, more preferably a fused ring group of a C3-C24 aliphatic ring and a C6-C24 aromatic ring.
In Formula (A),
5) L1 is a single bond; a C6-C60 arylene group; a fluorenylene group; a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring; and a C2-C60 heterocyclic group;
In case L1 is an arylene group, it may be preferably a C6-C30 arylene group, more preferably a C6-C24 arylene group, for example, phenylene, biphenyl, naphthalene, terphenyl, etc.
In case L′ is fused ring groups, it may be preferably a fused ring group of a C3-C30 aliphatic ring and a C6-C30 aromatic ring, more preferably a fused ring group of a C3-C24 aliphatic ring and a C6-C24 aromatic ring.
In case L′ is a heterocyclic group, it may be preferably a C2˜C30 heterocyclic group, and more preferably a C2˜C24 heterocyclic group, for example, pyrazine, thiophene, pyridine, pyrimidoindole, 5-phenyl-5H-pyrimido[5,4-b]indole, quinazoline, benzoquinazoline, carbazole, dibenzoquinazoline, dibenzofuran, dibenzothiophene, benzothienopyrimidine, benzofuropyrimidine, phenothiazine, phenylphenothiazine, etc.
6) Ar2 and Ar3 are each independently selected from the group consisting of a C6-C60 aryl group; a fluorenyl group; a C2-C60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring; or Ar2 and Ar3 may be bonded to each other to form a ring.
In case Ar2 and Ar3 are an aryl group, it may be preferably a C6-C30 aryl group, and more preferably a C6-C25 aryl group, for example, it may be phenylene, biphenyl, naphthalene, terphenyl, etc.
In case Ar2 and Ar3 are a heterocyclic group, it may be preferably a C2-C30 heterocyclic group, and more preferably a C2-C24 heterocyclic group, for example, it may be pyrazine, thiophene, pyridine, pyrimidoindole, 5-phenyl-5H-pyrimido[5,4-b]indole, quinazoline, benzoquinazoline, carbazole, dibenzoquinazoline, dibenzofuran, dibenzothiophene, benzothienopyrimidine, benzofuropyrimidine, phenothiazine, phenylphenothiazine, etc.
In case Ar2 and Ar3 are a fused ring group, it may be preferably a fused ring group of a C3-C30 aliphatic ring and a C6-C30 aromatic ring, more preferably a fused ring group of a C3-C24 aliphatic ring and a C6-C24 aromatic ring.
7) represents a position bonded to Formula (1),
8) wherein the aryl group, arylene group, arylamine group, heterocyclic group, fluorenyl group, fluorenylene group, fused ring group, alkyl group, alkenyl group, alkoxy group and aryloxy group may be substituted with one or more substituents selected from the group consisting of deuterium; halogen; silane group; siloxane group; boron group; germanium group; cyano group; nitro group; C1-C20 alkylthio group; C1-C20 alkoxyl group; C1-C20 alkyl group; C2-C20 alkenyl group; C2-C20 alkynyl group; C6-C20 aryl group; C6-C20 aryl group substituted with deuterium; a fluorenyl group; C2˜C20 heterocyclic group; C3-C20 cycloalkyl group; C7-C20 arylalkyl group; and C8-C20 arylalkenyl group; and -L′-N(Ra)(Rb); (wherein L′ is selected from the group consisting of a single bond; an C6-C60 arylene group; a fluorenylene group; a C2-C60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; and a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring, and Ra and Rb are each independently selected from the group consisting of a C6-C60 aryl group; a fluorenyl group; a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring; a C2-C60 heterocyclic group including at least one heteroatom of O, N, S, Si or P;) also the substituents may be bonded to each other to form a saturated or unsaturated ring, wherein the term ‘ring’ means a C3-C60 aliphatic ring or a C6-C60 aromatic ring or a C2-C60 heterocyclic group or a fused ring formed by the combination thereof.
Also, Formula (1) is represented by any one of Formulas (2) to (4)
wherein R1, R2, R3, R4, A, B, a, b, c, d and Ar1 are the same as defined in Formula (1) Formula (1) is represented by any one of Formulas (5) to (7)
In Formulas (5) to (7), each symbol may be defined as follows.
1) R1, R2, R3, R4, a, b, c, d, L1, Ar1, Ar2 and Ar3 are the same as defined in Formula (1) and Formula (A),
2) L2 is the same as the definition of L1, provided that L1 and L2 are the same or different from each other independently,
3) Ar4 and Ar5 are each independently selected from the group consisting of a C6-C60 aryl group; a fluorenyl group; a C2-C60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring; or Ar4 and Ar5 may be bonded to each other to form a ring.
In case Ar4 and Ar5 are an aryl group, it may be preferably a C6-C30 aryl group, and more preferably a C6-C25 aryl group, for example, it may be phenylene, biphenyl, naphthalene, terphenyl, etc.
In case Ar4 and Ar5 are a heterocyclic group, it may be preferably a C2-C30 heterocyclic group, and more preferably a C2-C24 heterocyclic group, for example, it may be pyrazine, thiophene, pyridine, pyrimidoindole, 5-phenyl-5H-pyrimido[5,4-b]indole, quinazoline, benzoquinazoline, carbazole, dibenzoquinazoline, dibenzofuran, dibenzothiophene, benzothienopyrimidine, benzofuropyrimidine, phenothiazine, phenylphenothiazine, etc.
In case Ar4 and Ar5 are a fused ring group, it may be preferably a fused ring group of a C3-C30 aliphatic ring and a C6-C30 aromatic ring, more preferably a fused ring group of a C3-C24 aliphatic ring and a C6-C24 aromatic ring.
4) a′ is an integer of 0 to 4.
Also, Formula (1) is represented by any one of Formulas (8) to (10)
Wherein R1, R2, R4, A, B, a, b, d and Ar1 are the same as defined in Formula (1).
Also, Formula (A) is represented by any one of Formulas (B) to (D)
In Formulas (B) to (D), each symbol may be defined as follows.
1) L1 and Ar2 are the same as defined in Formula (1) and Formula (A).
2) X is O, S, NR′ or CR′R″,
3) R′ and R″ are each independently selected from the group consisting of hydrogen; deuterium; halogen; a C1-C6 alkyl group; a C2-C60 alkenyl group; a C2-C60 alkynyl group; a C1-C60 alkoxyl group; a C6-C60 aryloxy group; a C6-C60 aryl group; fluorenyl group; a C2-C60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring; and C6-C60 arylamine group; or R′ and R″ may be bonded to each other to form a ring.
Wherein in case R and R″ are an alkyl group, it may be preferably a C1-C30 alkyl group, and more preferably a C1-C24 alkyl group.
In case R′ and R″ are an alkenyl group, they may be preferably an C2˜C30 alkenyl group, more preferably an C2˜C24 alkenyl group.
In case R′ and R″ are an alkynyl group, they may be preferably an C2-C30 alkynyl group, more preferably an C2˜C24 alkynyl group.
In case R′ and R″ are an alkoxyl group, it may be preferably a C1-C30 alkoxyl group, more preferably an C1˜C24 alkoxyl group.
In case R′ and R″ are an aryloxy group, it may be preferably a C6-C30 aryloxy group, more preferably an C6˜C24 aryloxy group.
In case R′ and R″ are an aryl group, it may be preferably a C6-C30 aryl group, and more preferably a C6-C25 aryl group, for example, it may be phenylene, biphenyl, naphthalene, terphenyl, etc.
In case R′ and R″ are a heterocyclic group, it may be preferably a C2-C30 heterocyclic group, and more preferably a C2-C24 heterocyclic group, for example, it may be pyrazine, thiophene, pyridine, pyrimidoindole, 5-phenyl-5H-pyrimido[5,4-b]indole, quinazoline, benzoquinazoline, carbazole, dibenzoquinazoline, dibenzofuran, dibenzothiophene, benzothienopyrimidine, benzofuropyrimidine, phenothiazine, phenylphenothiazine, etc.
In case R′ and R″ are a fused ring group, it may be preferably a fused ring group of a C3-C30 aliphatic ring and a C6-C30 aromatic ring, more preferably a fused ring group of a C3-C24 aliphatic ring and a C6-C24 aromatic ring.
In case R′ and R″ are an arylamine group, it may be preferably a C6-C30 arylamine group, and more preferably a C6-C24 arylamine group,
4) R5, R6, R7 and R8 are each independently selected from the group consisting of hydrogen; deuterium; halogen; a C1-C60 alkyl group; a C2-C60 alkenyl group; a C2-C60 alkynyl group; a C1-C60 alkoxyl group; a C6-C60 aryloxy group; a C6-C60 aryl group; fluorenyl group; a C2-C60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; a fused ring group of a C3-C60 aliphatic ring and a C6-C60 aromatic ring; and C6-C60 arylamine group; or wherein in case e, f, g and h are 2 or more, R5, R6, R7 and R8 are each in plural being the same or different, or a plurality of R5 or a plurality of R6 or a plurality of R7 or a plurality of R8 may be bonded to each other to form a ring.
Wherein in case R5, R6, R7 and R8 are an alkyl group, it may be preferably a C1-C30 alkyl group, and more preferably a C1-C24 alkyl group.
In case R5, R6, R7 and R8 are an alkenyl group, they may be preferably an C2˜C30 alkenyl group, more preferably an C2˜C24 alkenyl group.
In case R5, R6, R7 and R8 are an alkynyl group, they may be preferably an C2˜C30 alkynyl group, more preferably an C2˜C24 alkynyl group.
In case R5, R6, R7 and R8 are an alkoxyl group, it may be preferably a C1-C30 alkoxyl group, more preferably an C1˜C24 alkoxyl group.
In R5, R6, R7 and R8 are an aryloxy group, it may be preferably a C6-C30 aryloxy group, more preferably an C6˜C24 aryloxy group.
In case R5, R6, R7 and R8 are an aryl group, it may be preferably a C6-C30 aryl group, and more preferably a C6-C25 aryl group, for example, it may be phenylene, biphenyl, naphthalene, terphenyl, etc.
In case R5, R6, R7 and R8 are a heterocyclic group, it may be preferably a C2-C30 heterocyclic group, and more preferably a C2-C24 heterocyclic group, for example, it may be pyrazine, thiophene, pyridine, pyrimidoindole, 5-phenyl-5H-pyrimido[5,4-b]indole, quinazoline, benzoquinazoline, carbazole, dibenzoquinazoline, dibenzofuran, dibenzothiophene, benzothienopyrimidine, benzofuropyrimidine, phenothiazine, phenylphenothiazine, etc.
In case R5, R6, R7 and R8 are a fused ring group, it may be preferably a fused ring group of a C3-C30 aliphatic ring and a C6-C30 aromatic ring, more preferably a fused ring group of a C3-C24 aliphatic ring and a C6-C24 aromatic ring.
In case R5, R6, R7 and R8 are an arylamine group, it may be preferably a C6-C30 arylamine group, and more preferably a C6-C24 arylamine group,
5) e is an integer from 0 to 3, f and g are each independently an integer from 0 to 4, and h is an integer from 0 to 5.
Specifically, the compound represented by Formula (1) may be any one of the following compounds 1-1 to 1-132, but is not limited thereto.
Referring to
The organic material layer may sequentially include a hole injection layer (120), a hole transport layer (130), an emitting layer (140), an electron transport layer (150), and an electron injection layer (160) on the first electrode (110). In this case, the remaining layers except for the emitting layer (140) may not be formed. It may further include a hole blocking layer, an electron blocking layer, an emitting-auxiliary layer (220), a buffer layer (210), etc. and the electron transport layer (150) and the like may serve as a hole blocking layer. (See
Also, the organic electronic element according to an embodiment of the present invention may further include a protective layer or a light efficiency enhancing layer (180). The light efficiency enhancing layer may be formed on one of both surfaces of the first electrode not in contact with the organic material layer or on one of both surfaces of the second electrode not in contact with the organic material layer. The compound according to an embodiment of the present invention applied to the organic material layer may be used as a host or dopant of the hole injection layer (120), the hole transport layer (130), the emitting-auxiliary layer (220), electron transport auxiliary layer, the electron transport layer (150), and an electron injection layer (160), the emitting layer (140) or as a material for the light efficiency enhancing layer. Preferably, for example, the compound according to Formula (1) of the present invention may be used as a material for a hole transport layer, a host of the emitting layer, and/or an emitting auxiliary layer.
The organic material layer may include 2 or more stacks including a hole transport layer, an emitting layer and an electron transport layer sequentially formed on the anode, further include a charge generation layer formed between the 2 or more stacks (see
Otherwise, even with the same core, the band gap, electrical characteristics, interface characteristics, etc. may vary depending on which position the substituent is bonded to, therefore the choice of core and the combination of sub-substituents bound thereto are also very important, and in particular, when the optimal combination of energy levels and T1 values and unique properties of materials(mobility, interfacial characteristics, etc.) of each organic material layer is achieved, a long lifespan and high efficiency can be achieved at the same time.
The organic electroluminescent device according to an embodiment of the present invention may be manufactured using a PVD (physical vapor deposition) method. For example, depositing a metal or a metal oxide having conductivity or an alloy thereof on a substrate to form an anode, and after forming an organic material layer including the hole injection layer (120), the hole transport layer (130), the emitting layer (140), the electron transport layer (150) and the electron injection layer (160) thereon, it can be prepared by depositing a material that can be used as a cathode thereon.
Also, in the present invention, the organic material layer is formed by any one of a spin coating process, a nozzle printing process, an inkjet printing process, a slot coating process, a dip coating process, and a roll-to-roll process, and the organic material layer provides an organic electronic element comprising the compound as an electron transport material.
As another specific example, the same or different compounds of the compound represented by Formula (1) are mixed and used in the organic material layer.
Also, the present invention provides a hole transport layer, an emitting auxiliary layer or an emitting layer composition comprising the compound represented by Formula (1), and provides an organic electronic element comprising a hole transport layer, an emitting auxiliary layer or an emitting layer.
Also, the present invention provides an electronic device comprising a display device including the organic electronic element; and a control unit for driving the display device; In another aspect, the organic electronic element is at least one of an organic electroluminescent device, an organic solar cell, an organic photo conductor, an organic transistor, and a device for monochromatic or white lighting. At this time, the electronic device may be a current or future wired/wireless communication terminal, and covers all kinds of electronic devices including mobile communication terminals such as mobile phones, a personal digital assistant (PDA), an electronic dictionary, a point-to-multipoint (PMP), a remote controller, a navigation unit, a game player, various kinds of TVs, and various kinds of computers.
Hereinafter, a synthesis example of the compound represented by Formula (1) of the present invention and a manufacturing example of an organic electronic element of the present invention will be described in detail with reference to Examples, but the present invention is not limited to the following Examples.
The compound represented by Formula (1) according to the present invention (final products) is synthesized by reaction route of Reaction Schemes 1 to 3, but is not limited thereto.
Sub 1 of Reaction Schemes 1 to 3 may be synthesized by the reaction routes of Reaction Schemes 4 to 6, but is not limited thereto.
Synthesis examples of specific compounds belonging to Sub 1 are as follows.
THF (750 ml) was dissolved in 9-(4-bromophenyl)-9-methyl-9H-fluorene (50 g, 149.1 mmol), 2-(2-chlorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (35.6 g, 149.1 mmol), Pd(PPh3)4 (10.34 g, 8.95 mmol), K2CO3 (61.8 g, 447.4 mmol), and then water (380 ml) was added, followed by stirring at 90° C. After that, when the reaction was completed, the temperature of the reactant was cooled to room temperature, extracted with MC, and washed with water. The organic layer was dried over MgSO4 and concentrated, and the resulting organic material was separated by a silica gel filter to obtain 44.3 g (yield: 81%) of the product Sub 1-1.
THF (630 ml) was dissolved in 9-(3-bromophenyl)-9-phenyl-9H-fluorene (50 g, 125.8 mmol), 2-(3-chlorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (30 g, 125.8 mmol), Pd(PPh3)4 (8.73 g, 7.55 mmol), K2CO3 (52.2 g, 377.5 mmol) and then water (310 ml) was added, followed by stirring at 90° C. After that, when the reaction was completed, the temperature of the reactant was cooled to room temperature, extracted with MC, and washed with water. The organic layer was dried over MgSO4 and concentrated, and the resulting organic material was separated by a silica gel filter to obtain 43.2 g (yield: 80%) of the product Sub 1-5.
THF (630 ml) was dissolved in 9-(3-bromophenyl)-9-phenyl-9H-fluorene (50 g, 125.8 mmol), 2-(2-chlorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (30 g, 125.8 mmol), Pd(PPh3)4 (8.73 g, 7.55 mmol), K2CO3 (52.2 g, 377.5 mmol) and then water (310 ml) was added, followed by stirring at 90° C. After that, when the reaction was completed, the temperature of the reactant was cooled to room temperature, extracted with MC, and washed with water. The organic layer was dried over MgSO4 and concentrated, and the resulting organic material was separated by a silica gel filter to obtain 42.6 g (yield: 79%) of the product Sub 1-7.
THF (530 ml) was dissolved in 9-([1,1′-biphenyl]-4-yl)-9-(2-bromophenyl)-9H-fluorene (50 g, 105.6 mmol), 2-(3-chlorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (25.2 g, 105.6 mmol), Pd(PPh3)4 (7.32 g, 6.34 mmol), K2C03 (43.8 g, 316.9 mmol) and then water (260 ml) was added, followed by stirring at 90° C. After that, when the reaction was completed, the temperature of the reactant was cooled to room temperature, extracted with MC, and washed with water. The organic layer was dried over MgSO4 and concentrated, and the resulting organic material was separated by a silica gel filter to obtain 36.3 g (yield: 68%) of the product Sub 1-10.
THF (630 ml) was dissolved in 9-(3-bromophenyl)-9-phenyl-9H-fluorene (50 g, 125.8 mmol), 2-(1-chlorodibenzo[b,d]furan-3-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (41.4 g, 125.8 mmol), Pd(PPh3)4 (8.73 g, 7.55 mmol), K2CO3 (52.2 g, 377.5 mmol) and then water (310 ml) was added, followed by stirring at 90° C. After that, when the reaction was completed, the temperature of the reactant was cooled to room temperature, extracted with MC, and washed with water. The organic layer was dried over MgSO4 and concentrated, and the resulting organic material was separated by a silica gel filter to obtain 52.3 g (yield: 80%) of the product Sub 1-25.
THF (630 ml) was dissolved in 9-(3-bromophenyl)-9-phenyl-9H-fluorene (50 g, 125.8 mmol), 2-(3-(4-chloronaphthalen-1-yl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (45.9 g, 125.8 mmol), Pd(PPh3)4 (8.73 g, 7.55 mmol), K2CO3 (52.2 g, 377.5 mmol) and then water (310 ml) was added, followed by stirring at 90° C. After that, when the reaction was completed, the temperature of the reactant was cooled to room temperature, extracted with MC, and washed with water. The organic layer was dried over MgSO4 and concentrated, and the resulting organic material was separated by a silica gel filter to obtain 54.5 g (yield: 78%) of the product Sub 1-31.
THF (630 ml) was dissolved in 9-(4-bromophenyl)-9-phenyl-9H-fluorene (50 g, 125.8 mmol), 2-(3′,6-dichloro-[1,1′-biphenyl]-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (43.9 g, 125.8 mmol), Pd(PPh3)4 (8.73 g, 7.55 mmol), K2CO3 (52.2 g, 377.5 mmol) and then water (310 ml) was added, followed by stirring at 90° C. After that, when the reaction was completed, the temperature of the reactant was cooled to room temperature, extracted with MC, and washed with water. The organic layer was dried over MgSO4 and concentrated, and the resulting organic material was separated by a silica gel filter to obtain 49.6 g (yield: 73%) of the product Sub 1-36.
THF (560 ml) was dissolved in 11-(3-bromophenyl)-11-phenyl-11H-benzo[b]fluorene (50 g, 111.8 mmol), 2-(3-chlorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (26.7 g, 111.8 mmol), Pd(PPh3)4 (7.75 g, 6.71 mmol), K2CO3 (46.3 g, 335.3 mmol) and then water (310 ml) was added, followed by stirring at 90° C. After that, when the reaction was completed, the temperature of the reactant was cooled to room temperature, extracted with MC, and washed with water. The organic layer was dried over MgSO4 and concentrated, and the resulting organic material was separated by a silica gel filter to obtain 42.8 g (yield: 80%) of the product Sub 1-52.
The compound belonging to Sub 1 may be the following compounds, but is not limited thereto, and Table 1 below shows FD-MS (Field Desorption-Mass Spectrometry) values of the compounds belonging to Sub 1.
Sub 2 of Reaction Schemes 1 to 3 may be synthesized by the reaction route of Reaction Scheme 7, but is not limited thereto.
Synthesis examples of specific compounds belonging to Sub 2 are as follows.
aniline (29.65 g, 318.45 mmol), Pd2(dba)3 (8.74 g, 9.55 mmol), P(t-Bu)3 (6.44 g, 31.84 mmol), NaOt-Bu (61.20 g, 636.9 mmol), Toluene (900 mL) were added to bromobenzene (50 g, 318.45 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain Sub 2-1 (40.41 g, yield: 75%).
aniline (17 g, 183 mmol), Pd2(dba)3 (5.03 g, 5.49 mmol), P(t-Bu)3 (2.22 g, 10.98 mmol), NaOt-Bu (35.2 g, 366.1 mmol), Toluene (900 mL) were added to 2-bromo-9,9-dimethyl-9H-fluorene (50 g, 183 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain Sub 2-4 (38.1 g, yield: 73%).
dibenzo[b,d]thiophen-2-amine (40.3 g, 202.4 mmol), Pd2(dba)3 (5.56 g, 6.07 mmol), P(t-Bu)3 (2.46 g, 12.14 mmol), NaOt-Bu (38.9 g, 404.7 mmol), Toluene (1000 mL) were added to 2-bromodibenzo[b,d]furan (50 g, 202.4 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain Sub 2-11 (51.8 g, yield: 70%).
naphthalen-2-amine (34.6 g, 241.5 mmol), Pd2(dba)3 (6.63 g, 7.24 mmol), P(t-Bu)3 (2.93 g, 14.49 mmol), NaOt-Bu (46.4 g, 482.9 mmol), Toluene (1200 mL) were added to 2-bromonaphthalene (50 g, 241.5 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain Sub 2-14 (48.1 g, yield: 74%).
After dissolving dibenzo[b,e][1,4]dioxine (50 g, 271.45 mmol) in 500 ml of dichloromethane, the mixture was stirred at 0° C. for 30 minutes. Br2 (43.16 g, 271.45 mmol) was slowly added dropwise, and the reaction solution was stirred at room temperature for 6 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, the resulting compound was subjected to silicagel column and recrystallization to obtain Sub 2-22a (64.27 g, yield: 90%) as a product.
aniline (17.69 g, 190.04 mmol), Pd2(dba)3 (5.22 g, 5.70 mmol), P(t-Bu)3 (3.84 g, 19.00 mmol), NaOt-Bu (36.52 g, 380.08 mmol), Toluene (600 mL) were added to Sub 2-22a (50 g, 190.04 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain Sub 2-22 (41.33 g, yield: 79%).
aniline (15.7 g, 168.3 mmol), Pd2(dba)3 (4.62 g, 5.05 mmol), P(t-Bu)3 (2.04 g, 10.1 mmol), NaOt-Bu (32.3 g, 336.5 mmol), Toluene (850 mL) were added to 2-bromonaphtho[2,3-b]benzofuran (50 g, 168.3 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain Sub 2-36 (38 g, yield: 73%).
[1,1′-biphenyl]-4-amine (34.2 g, 202.4 mmol), Pd2(dba)3 (5.56 g, 6.07 mmol), P(t-Bu)3 (2.46 g, 12.14 mmol), NaOt-Bu (38.9 g, 404.7 mmol), Toluene (1000 mL) were added to 2-bromodibenzo[b,d]furan (50 g, 202.4 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain Sub 2-39 (48.9 g, yield: 72%).
[1,1′-biphenyl]-4-amine (36.3 g, 214.5 mmol), Pd2(dba)3 (5.89 g, 6.43 mmol), P(t-Bu)3 (2.6 g, 12.87 mmol), NaOt-Bu (41.2 g, 429 mmol), Toluene (1000 mL) were added to 4-bromo-1,1′-biphenyl (50 g, 214.5 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain Sub 2-57 (48.3 g, yield: 70%).
The compound belonging to Sub 2 may be the following compounds, but is not limited thereto, and Table 1 below shows FD-MS (Field Desorption-Mass Spectrometry) values of the compounds belonging to Sub 2.
Sub 2-4 (13.3 g, 46.6 mmol), Pd2(dba)3 (1.28 g, 1.4 mmol), P(t-Bu)3 (0.57 g, 2.8 mmol), NaOt-Bu (9.0 g, 93.2 mmol), Toluene (200 mL) were added to Sub 1-5 (20 g, 46.6 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain 1-5 (22.4 g, yield: 71%).
Sub 2-4 (13.3 g, 46.6 mmol), Pd2(dba)3 (1.28 g, 1.4 mmol), P(t-Bu)3 (0.57 g, 2.8 mmol), NaOt-Bu (9.0 g, 93.2 mmol), Toluene (200 mL) were added to Sub 1-7 (20 g, 46.6 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain 1-9 (21.8 g, yield: 69%).
Sub 2-22 (10.9 g, 39.6 mmol), Pd2(dba)3 (1.09 g, 1.19 mmol), P(t-Bu)3 (0.48 g, 2.38 mmol), NaOt-Bu (7.6 g, 79.2 mmol), Toluene (200 mL) were added to Sub 1-16 (20 g, 39.6 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain 1-32 (18.3 g, yield: 62%).
Sub 2-42 (18.3 g, 46.6 mmol), Pd2(dba)3 (1.28 g, 1.4 mmol), P(t-Bu)3 (0.57 g, 2.8 mmol), NaOt-Bu (9.0 g, 93.2 mmol), Toluene (230 mL) were added to Sub 1-9 (20 g, 46.6 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain 1-56 (25.6 g, yield: 70%).
Sub 2-3 (9.7 g, 39.6 mmol), Pd2(dba)3 (1.09 g, 1.19 mmol), P(t-Bu)3 (0.48 g, 2.38 mmol), NaOt-Bu (7.6 g, 79.2 mmol), Toluene (200 mL) were added to Sub 1-22 (20 g, 39.6 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain 1-57 (18.9 g, yield: 67%).
Sub 2-7 (12.0 g, 36.0 mmol), Pd2(dba)3 (0.99 g, 1.08 mmol), P(t-Bu)3 (0.44 g, 2.16 mmol), NaOt-Bu (6.9 g, 72.1 mmol), Toluene (200 mL) were added to Sub 1-31 (20 g, 36.0 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain 1-75 (21.5 g, yield: 70%).
Sub 2-1 (11.0 g, 65.0 mmol), Pd2(dba)3 (1.78 g, 1.95 mmol), P(t-Bu)3 (0.79 g, 3.9 mmol), NaOt-Bu (12.5 g, 130.0 mmol), Toluene (180 mL) were added to Sub 1-38 (20 g, 32.5 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain 1-82 (19.5 g, yield: 68%).
Sub 2-4 (11.9 g, 41.8 mmol), Pd2(dba)3 (1.15 g, 1.25 mmol), P(t-Bu)3 (0.51 g, 2.51 mmol), NaOt-Bu (8.0 g, 83.5 mmol), Toluene (200 mL) were added to Sub 1-52 (20 g, 41.8 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain 1-109 (21.9 g, yield: 72%).
Sub 2-8 (13.2 g, 48.0 mmol), Pd2(dba)3 (1.32 g, 1.44 mmol), P(t-Bu)3 (0.58 g, 2.88 mmol), NaOt-Bu (9.2 g, 95.9 mmol), Toluene (240 mL) were added to Sub 1-59 (20 g, 48.0 mmol) and reacted for 2 hours. When the reaction is complete, the mixture is extracted with water, the organic layer is dried over MgSO4 and concentrated, and the resulting compound was recrystallized by silicagel column to obtain 1-115 (22.0 g, yield: 70%).
Meanwhile, FD-MS values of compounds 1-1 to 1-132 of the present invention prepared according to the above synthesis examples are shown in Table 3.
After vacuum deposition of N1-(naphthalen-2-yl)-N4,N4-bis(4-(naphthalen-2-yl(phenyl)amino)phenyl)-N1-phenylbenzene-1,4-diamine(Hereinafter, abbreviated as 2-TNATA) to a thickness of 60 nm on the ITO layer (anode) formed on the glass substrate to form a hole injection layer, Compound 1-5 of the present invention was vacuum-deposited on the hole injection layer to a thickness of 60 nm to form a hole transport layer.
Then, an emitting layer having a thickness of 30 nm was formed on the hole transport layer by using 4,4′-N,N′-dicarbazolebiphenyl (hereinafter abbreviated as CBP) as a host and Ir(ppy)3 as a dopant in a weight ratio of 90:10. Then, (1,1′-biphenyl-4-olato)bis(2-methyl-8-quinolinolato)aluminum (hereinafter abbreviated as BAlq) was deposited on the emitting layer to a thickness of 10 nm to form a hole blocking layer, bis(10-hydroxybenzo[h]quinolinato)beryllium (hereinafter abbreviated as BeBq2) was deposited on the hole blocking layer to a thickness of 35 nm to form an electron transport layer. Thereafter, LiF was deposited to a thickness of 0.2 nm to form an electron injection layer, and then Al was deposited to a thickness of 150 nm to form a cathode, thereby manufacturing an organic electroluminescent device.
An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the compound of the present invention described in Table 4 was used instead of Compound 1-5 as the material of the hole transport layer.
An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the following comparative compound A or B was used instead of the compound 1-5 of the present invention as a material for the hole transport layer.
<comparative compound A> <comparative compound A>
By applying a forward bias DC voltage to the organic electroluminescent devices manufactured by Examples 1 to 10, Comparative Examples 1 and 2 of the present invention, Electroluminescence (EL) characteristics were measured with PR-650 from Photoresearch, and as a result of the measurement, the T95 lifetime was measured using a lifetime measuring device manufactured by McScience at 5000 cd/m2 standard luminance. Table 4 below shows the device fabrication and evaluation results.
As can be seen from the results in Table 4, when manufacturing a green organic electronic element using the material for an organic electronic element of the present invention as an hole transport layer material, Compared to Comparative Examples 1 and 2 in which Comparative Compounds A and B were used as the hole transport layer material, the driving voltage of the organic electroluminescent device could be lowered, and the luminous efficiency and lifespan were significantly improved. More specifically, compared to Comparative Example 1 in which a hole transport layer was formed using Comparative Compound A in which phenylene was substituted between the fluorene moiety and the amino group, the device result of Comparative Example 2 in which a hole transport layer was formed using Comparative Compound B in which biphenylene was substituted between a fluorene moiety and an amino group similarly to the compound of the present invention showed an improved value.
The compound of the present invention and Comparative Compound B are identical in that a biphenylene moiety is substituted between the fluorene moiety and the amino group, but the compound of the present invention is different in that the fluorene moiety and the amino group are substituted at the ortho or meta position based on the benzene ring where the amino group is substituted among the biphenylene moieties.
Accordingly, looking at the device results of Comparative Examples and Examples, although Comparative Compounds A and B and the compounds of the present invention consist of similar components, it can be seen that the physical properties of the compound are significantly different depending on the structure of the arylene group between the fluorene moiety and the amino group and the substitution position of the arylene group, when viewed based on the benzene ring substituted with the amino group in the biphenylene moiety as in the compound of the present invention, by substituting the fluorene moiety and the amino group at the ortho or meta position, the physical properties of the compound, such as hole properties, light efficiency properties, energy levels (LUMO and HOMO level, T1 level) hole injection & mobility properties, and electron blocking properties, are more suitable for the hole transport layer, as a result, it can be seen that the device results of Examples 1 to 10, which are completely different from the device characteristics of Comparative Examples 1 and 2, can be derived.
In addition, in the evaluation results of the above-described device fabrication, the device characteristics were described in which the compound of the present invention was applied to the hole transport layer, the compound of the present invention may be applied to any one or more layers of an emitting layer, a hole transport layer, an emitting auxiliary layer, and a capping layer.
Although exemplary embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Therefore, the embodiment disclosed in the present invention is intended to illustrate the scope of the technical idea of the present invention, and the scope of the present invention is not limited by the embodiment. The scope of the present invention shall be construed on the basis of the accompanying claims, and it shall be construed that all of the technical ideas included within the scope equivalent to the claims belong to the present invention.
According to the present invention, it is possible to manufacture an organic device having excellent device characteristics of high luminance, high light emission and long lifespan, and thus there is industrial applicability.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2020-0015656 | Feb 2020 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2021/001655 | 2/25/2021 | WO |
