Composition for organic optoelectronic device, organic optoelectronic device and display device

Abstract

A composition for an organic optoelectronic device, an organic optoelectronic device, and a display device, the organic optoelectronic device comprising the composition for an organic optoelectronic device, the composition for an organic optoelectronic device comprising a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2. # imgabs0 #

Description

[0001] Citation of Related Applications

[0002] This application claims priority and the benefit of Korean Patent Application No. 10-2024-0009465, filed with the Korean Intellectual Property Office on January 22, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Embodiments relate to a composition for an organic optoelectronic device, an organic optoelectronic device, and a display device. Background Art

[0004] An organic optoelectronic device (e.g., an organic optoelectronic diode) is a device capable of converting electrical energy and light energy into each other.

[0005] According to the working principle, organic optoelectronic devices can be divided into two categories. One is a photoelectric device that generates electrical energy by separating excitons formed by light energy into electrons and holes and transferring the electrons and holes to different electrodes, respectively, and the other is a light-emitting device that generates light energy from electrical energy by applying a voltage or current to an electrode.

[0006] Examples of organic optoelectronic devices include organic optoelectronic devices, organic light-emitting diodes, organic solar cells, and organic photo drums.

[0007] Among them, due to the increasing demand for flat panel display devices, organic light-emitting diodes (OLEDs) have received much attention in recent years. An organic light-emitting diode is a device that converts electrical energy into light, and the performance of an organic light-emitting diode is greatly affected by the organic material between the electrodes. Summary of the Invention

[0008] Embodiments can be achieved by providing a composition for an organic optoelectronic device, the composition including a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2:

[0009] [Chemical Formula 1]

[0010]

[0011] In Chemical Formula 1, Z 1 to Z 3 are each independently N or CR a , at least two of Z 1 to Z 3 are N, L 1 and L 2 are each independently a single bond, a substituted or unsubstituted C6 to C30 arylene group, or a substituted or unsubstituted divalent C2 to C30 heterocyclic group, L 3 is a single bond or a substituted or unsubstituted C6 to C30 arylene group, Ar1 and Ar 2 are each independently a substituted or unsubstituted C6 - C30 aryl group, a substituted or unsubstituted C2 - C30 heterocyclic group, or a substituted or unsubstituted silyl group, R 1 to R 8 and R a are each independently hydrogen, deuterium, a substituted or unsubstituted C1 - C20 alkyl group, a substituted or unsubstituted C6 - C30 aryl group, a substituted or unsubstituted C2 - C30 heterocyclic group, a substituted or unsubstituted amino group, a substituted or unsubstituted silyl group, a cyano group, or a halogen, and R 1 to R 8 each exist separately or two adjacent ones combine to form a ring,

[0012] [Chemical formula 2]

[0013]

[0014] In Chemical formula 2, L 7 and L 8 are each independently a single bond or a substituted or unsubstituted C6 - C30 arylene group, Ar 7 is a substituted or unsubstituted C6 - C30 aryl group or a substituted or unsubstituted C2 - C30 heterocyclic group, and R 30 to R 33 , R 34 ', R 34 ", R 34 "' and R 35 to R 42 are each independently hydrogen, deuterium, a substituted or unsubstituted C1 - C30 alkyl group, a substituted or unsubstituted C6 - C30 aryl group, a substituted or unsubstituted C2 - C30 heterocyclic group, a substituted or unsubstituted amino group, a substituted or unsubstituted silyl group, a cyano group, or a halogen.

[0015] An embodiment can be achieved by providing an organic optoelectronic device including an anode and a cathode facing each other and a light - emitting layer between the anode and the cathode, wherein the light - emitting layer contains a composition for an organic optoelectronic device according to one embodiment.

[0016] An embodiment can be achieved by providing a display device including an organic optoelectronic device according to one embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By describing exemplary embodiments in detail with reference to the drawings, the features will be apparent to those skilled in the art, wherein:

[0018] Figure 1is a cross-sectional view showing an example of an organic light-emitting diode according to some embodiments, and

[0019] Figure 2 is a cross-sectional view showing another example of an organic light-emitting diode according to some embodiments. Detailed embodiments

[0020] Exemplary embodiments will now be described more fully hereinafter with reference to the accompanying drawings; however, they may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the exemplary embodiments to those skilled in the art.

[0021] In the drawings, the dimensions of layers and regions may be exaggerated for clarity. It will also be understood that when a layer or element is referred to as being “on” another layer or element, it can be directly on the other layer or element, or intervening layers may also be present. Further, it will be understood that when a layer is referred to as being “between” two layers, the layer may be the only layer between the two layers, or one or more intervening layers may also be present. Like reference numerals always denote like elements. As used herein, the term “or” is not necessarily an exclusive term, e.g., “A or B” will include A, B, or A and B.

[0022] As used herein, when no definition is otherwise provided, “substituted” means that at least one hydrogen of a substituent or compound is replaced with one of the following: deuterium, halogen, hydroxyl, amino, substituted or unsubstituted C1-C30 amino group, nitro, substituted or unsubstituted C1-C40 silyl group, C1-C30 alkyl group, C1-C10 alkylsilyl group, C6-C30 arylsilyl group, C3-C30 cycloalkyl group, C3-C30 heterocycloalkyl group, C6-C30 aryl group, C2-C30 heteroaryl group, C1-C20 alkoxy group, C1-C10 trifluoroalkyl group, cyano group, or a combination thereof.

[0023] In one instance, "substituted" means that at least one hydrogen of a substituent or a compound is replaced by one of the following: deuterium, a C1-C30 alkyl group, a C1-C10 alkylsilyl group, a C6-C30 arylsilyl group, a C3-C30 cycloalkyl group, a C3-C30 heterocycloalkyl group, a C6-C30 aryl group, a C2-C30 heteroaryl group, or a cyano group. In a specific instance, "substituted" means that at least one hydrogen of a substituent or a compound is replaced by one of the following: deuterium, a C1-C20 alkyl group, a C6-C30 aryl group, or a cyano group. In a specific instance, "substituted" means that at least one hydrogen of a substituent or a compound is replaced by one of the following: deuterium, a C1-C5 alkyl group, a C6-C18 aryl group, or a cyano group. In a specific instance, "substituted" means that at least one hydrogen of a substituent or a compound is replaced by one of the following: deuterium, a cyano group, a methyl group, an ethyl group, a propyl group, a butyl group, a phenyl group, a biphenyl group, a terphenyl group, or a naphthyl group.

[0024] "Unsubstituted" means that a hydrogen atom is not replaced by another substituent and the hydrogen atom is retained.

[0025] In this specification, "hydrogen substitution (-H)" may include "deuterium substitution (-D)" or "tritium substitution (-T)". For example, any hydrogen in any compound described herein can be protium, deuterium, or tritium (e.g., based on natural or artificial substitution).

[0026] As used herein, when no other definition is provided, "hetero" means containing one to three heteroatoms selected from N, O, S, P, and Si and the remaining carbon atoms in a functional group.

[0027] As used herein, "aryl" means a group including at least one hydrocarbon aromatic moiety, and all elements of the hydrocarbon aromatic moiety have conjugated p-orbitals, such as a phenyl group, a naphthyl group, etc. Two or more hydrocarbon aromatic moieties can be connected by a σ bond and can be, for example, a biphenyl group, a terphenyl group, a quaterphenyl group, etc., and two or more hydrocarbon aromatic moieties are directly or indirectly fused to provide a non-aromatic fused ring, such as a fluorenyl group.

[0028] An aryl group can include a monocyclic, polycyclic, or fused polycyclic (i.e., rings sharing adjacent carbon atom pairs) functional group.

[0029] As used herein, "heterocyclic group" is a superordinate concept of heteroaryl and can include at least one heteroatom selected from N, O, S, P, and Si in place of a carbon (C) in a cyclic compound, such as an aryl group, a cycloalkyl group, their fused rings, or their combination. When the heterocyclic group is a fused ring, the entire ring or each ring of the heterocyclic group can include one or more heteroatoms.

[0030] For example, "heteroaryl" may refer to an aryl group including at least one heteroatom selected from N, O, S, P, and Si. Two or more heteroaryl groups are directly connected by a σ bond, or when a heteroaryl group includes two or more rings, the two or more rings may be fused. When the heteroaryl group is a fused ring, each ring may include one to three heteroatoms.

[0031] More specifically, the substituted or unsubstituted C6-C30 aryl group may be a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthracenyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted condensed tetraphenyl group, a substituted or unsubstituted pyrenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted p-terphenyl group, a substituted or unsubstituted m-terphenyl group, a substituted or unsubstituted o-terphenyl group, a substituted or unsubstituted chrysenyl group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted perylenyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted indenyl group, or a combination thereof, but is not limited thereto.

[0032] More specifically, the substituted or unsubstituted C2-C30 heterocyclic group may be a substituted or unsubstituted furyl group, a substituted or unsubstituted thienyl group, a substituted or unsubstituted pyrrolyl group, a substituted or unsubstituted pyrazolyl group, a substituted or unsubstituted imidazolyl group, a substituted or unsubstituted triazolyl group, a substituted or unsubstituted oxazolyl group, a substituted or unsubstituted thiazolyl group, a substituted or unsubstituted oxadiazolyl group, a substituted or unsubstituted thiadiazolyl group, a substituted or unsubstituted pyridyl group, a substituted or unsubstituted pyrimidinyl group, a substituted or unsubstituted pyrazinyl group, a substituted or unsubstituted triazinyl group, a substituted or unsubstituted benzofuryl group, a substituted or unsubstituted benzothienyl group, a substituted or unsubstituted benzimidazolyl group, a substituted or unsubstituted indolyl group, a substituted or unsubstituted quinolinyl group, a substituted or unsubstituted isoquinolinyl group, a substituted or unsubstituted quinazolinyl group, a substituted or unsubstituted quinoxalinyl group, a substituted or unsubstituted naphthyridinyl group, a substituted or unsubstituted benzoxazinyl group, a substituted or unsubstituted benzothiazinyl group, a substituted or unsubstituted acridinyl group, a substituted or unsubstituted phenazinyl group, a substituted or unsubstituted phenothiazinyl group, a substituted or unsubstituted phenoxazinyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzofuryl group, a substituted or unsubstituted dibenzothienyl group, or a combination thereof, but is not limited thereto.

[0033] As used herein, the hole property refers to the ability to provide electrons to form holes when an electric field is applied, and due to the conductive property according to the highest occupied molecular orbital (HOMO) energy level, the holes formed in the anode can be easily injected into the light-emitting layer and transported in the light-emitting layer.

[0034] In addition, the electron affinity refers to the ability to accept electrons when an electric field is applied, and due to the conductive properties according to the lowest unoccupied molecular orbital (LUMO) energy level, the electrons formed in the cathode can be easily injected into the light-emitting layer and transported in the light-emitting layer.

[0035] Hereinafter, compositions for organic optoelectronic devices according to some embodiments will be described.

[0036] The composition for an organic optoelectronic device according to some embodiments may include a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2.

[0037] [Chemical Formula 1]

[0038]

[0039] In Chemical Formula 1, Z 1 to Z 3 may each independently be, for example, N or CR a . In one embodiment, at least two of Z 1 to Z 3 are N.

[0040] L 1 and L 2 may each independently be or include, for example, a single bond, a substituted or unsubstituted C6 to C30 arylene group, or a substituted or unsubstituted divalent C2 to C30 heterocyclic group.

[0041] L 3 may be or include, for example, a single bond or a substituted or unsubstituted C6 to C30 arylene group.

[0042] Ar 1 and Ar 2 may each independently be or include, for example, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, or a substituted or unsubstituted silyl group.

[0043] R 1 to R 8 and R a may each independently be or include, for example, hydrogen, deuterium, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, a cyano group, or a halogen.

[0044] In one embodiment, R 1 to R 8 may each exist separately or two adjacent ones may combine to form a ring.

[0045] [Chemical Formula 2]

[0046]

[0047] In Chemical Formula 2, L 7 and L 8 may each independently be or include, for example, a single bond or a substituted or unsubstituted C6 to C30 arylene group.

[0048] Ar 7 may be or include, for example, a substituted or unsubstituted C6 to C30 aryl group or a substituted or unsubstituted C2 to C30 heterocyclic group.

[0049] R 30 to R 33 、R 34 ', R 34 ”, R 34 ”' and R 35 to R 42 may each independently be or include, for example, hydrogen, deuterium, a substituted or unsubstituted C1 to C30 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, a substituted or unsubstituted amino group, a substituted or unsubstituted silyl group, a cyano group, or a halogen.

[0050] The first compound and the second compound may be bipolar compounds each having both electron transport properties and hole transport properties. The first compound may be a bipolar compound having relatively strong electron transport properties, and the second compound may be a compound having relatively strong hole transport properties. In one embodiment, the first compound and the second compound may exhibit good interfacial properties due to their structures.

[0051] The composition for an organic optoelectronic device may simultaneously contain the first compound and the second compound to finely control the mobilities of holes and electrons, thereby balancing holes and electrons in the active layer (e.g., the light-emitting layer) of the organic optoelectronic device.

[0052] In one embodiment, the composition for an organic optoelectronic device may be used as a host of the light-emitting layer and have good electrical matching with a blue-light-emitting dopant described later, which emits light in the blue emission spectrum, thereby improving the efficiency of the organic optoelectronic device and suppressing the deterioration of the organic optoelectronic device. In one embodiment, at least one of the first compound and the second compound may have a high triplet energy level of greater than or equal to about 2.8 eV, such that exciton transfer to the blue-light-emitting dopant can be promoted, thereby realizing an organic optoelectronic device having high efficiency and long lifetime.

[0053] In one embodiment, in Chemical Formula 1, Z 1from Z to 3 may each be, for example, N.

[0054] In one embodiment, in Chemical Formula 1, Z 1 and Z 2 may each be, for example, N, and Z 3 may be, for example, CR a .

[0055] In one embodiment, in Chemical Formula 1, Z 1 and Z 3 may each be, for example, N, and Z 2 may be, for example, CR a .

[0056] In one embodiment, in Chemical Formula 1, L 1 and L 2 may each independently be, for example, a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted terphenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted benzofuranylene, a substituted or unsubstituted dibenzofuranylene, a substituted or unsubstituted benzothiophenylene, a substituted or unsubstituted dibenzothiophenylene, or a substituted or unsubstituted fluorenylene.

[0057] In one embodiment, in Chemical Formula 1, L 1 and L 2 may each independently be, for example, a single bond or a substituted or unsubstituted C6 - C20 arylene, such as a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted terphenylene, or a substituted or unsubstituted naphthylene.

[0058] In one embodiment, in Chemical Formula 1, L 3 may be, for example, a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, or a substituted or unsubstituted naphthylene, such as a single bond or a substituted or unsubstituted phenylene.

[0059] In one embodiment, in Chemical Formula 1, one of L 1 to L 3 may be different from the other two, and for example, L 3 may be different from L 1 and L 2 .

[0060] In one embodiment, in Chemical Formula 1, Ar 1 and Ar 2Each may independently be, for example, a substituted or unsubstituted phenyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted anthryl, a substituted or unsubstituted phenanthryl, a substituted or unsubstituted terphenylene, a substituted or unsubstituted fluorenyl, a substituted or unsubstituted benzofuranyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted benzothienyl, a substituted or unsubstituted dibenzothienyl, a substituted or unsubstituted benzosilolyl, a substituted or unsubstituted dibenzosilolyl, a substituted or unsubstituted pyridyl, a substituted or unsubstituted pyrimidinyl, a substituted or unsubstituted triazinyl, or a fused ring thereof.

[0061] In one embodiment, in Chemical Formula 1, Ar 1 , Ar 2 and R 1 to R 8 at least one of which may be, for example, a substituted or unsubstituted C2-C30 heterocyclic group. For example, in Chemical Formula 1, Ar 1 , Ar 2 and R 1 to R 8 at least one of which may be, for example, a substituted or unsubstituted benzofuranyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted benzothienyl, a substituted or unsubstituted dibenzothienyl, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted triazinyl, or a fused ring thereof.

[0062] In one embodiment, in Chemical Formula 1, Ar 1 may be, for example, a substituted or unsubstituted C2-C30 heterocyclic group, such as a substituted or unsubstituted benzofuranyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted benzothienyl, a substituted or unsubstituted dibenzothienyl, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted triazinyl, or a fused ring thereof. In one embodiment, in Chemical Formula 1, L 1 may be, for example, a single bond, L 3 may be a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, or a substituted or unsubstituted naphthylene, and R 1 to R 8 and R a may each independently be, for example, hydrogen, deuterium, a substituted or unsubstituted C1-C20 alkyl, or a substituted or unsubstituted C6-C30 aryl.

[0063] In one embodiment, the first compound may be represented, for example, by Chemical Formula 1a.

[0064] [Chemical Formula 1a]

[0065]

[0066] In Chemical Formula 1a, Z 1 to Z 3 , L 1 to L 3 , Ar 1 and Ar 2 and R 1 to R 8 may be defined as the same as those described above.

[0067] X may be, for example, O or S.

[0068] R 9 to R 15 may each independently be, for example, hydrogen, deuterium, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heterocyclic group, a cyano group or a halogen, and may be, for example, hydrogen, deuterium, a substituted or unsubstituted methyl group, a substituted or unsubstituted ethyl group, a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group or a substituted or unsubstituted naphthyl group.

[0069] In one embodiment, the first compound represented by Chemical Formula 1a may be represented by Chemical Formula 1a-1, for example.

[0070] [Chemical Formula 1a-1]

[0071]

[0072] In one embodiment, in Chemical Formula 1, at least one of R 1 to R 8 may be, for example, a substituted or unsubstituted benzofuranyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted benzothiophenyl group, a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted carbazolyl group or a substituted or unsubstituted triazinyl group.

[0073] In one embodiment, in Chemical Formula 1, L 3 may be, for example, a single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted biphenylene group or a substituted or unsubstituted naphthylene group, and in Chemical Formula 1, Ar 1 and Ar 2 may each independently be a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthryl group, a substituted or unsubstituted phenanthryl group or a substituted or unsubstituted terphenylene group.

[0074] In one embodiment, in Chemical Formula 1, R 1 to R 8One of them can be, for example, a substituted or unsubstituted benzofuranyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted benzothiophenyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted carbazolyl, or a substituted or unsubstituted triazinyl, and in Chemical Formula 1, R 1 to R 8 The remaining ones among them can be, for example, hydrogen, deuterium, a substituted or unsubstituted methyl, a substituted or unsubstituted ethyl, a substituted or unsubstituted phenyl, a substituted or unsubstituted biphenyl, or a substituted or unsubstituted naphthyl.

[0075] In one embodiment, R a can be, for example, hydrogen, deuterium, a substituted or unsubstituted methyl, a substituted or unsubstituted ethyl, a substituted or unsubstituted phenyl, or a cyano group.

[0076] In one embodiment, the first compound can be represented, for example, by Chemical Formula 1b or 1c.

[0077] [Chemical Formula 1b]

[0078]

[0079] [Chemical Formula 1c]

[0080]

[0081] In Chemical Formula 1b or 1c, Z 1 to Z 3 、L 1 to L 3 、Ar 1 、Ar 2 and R 1 to R 8 can be defined to be the same as those described above.

[0082] X can be, for example, O or S.

[0083] R 9 to R 15 can each independently be, for example, hydrogen, deuterium, a substituted or unsubstituted C1-C20 alkyl, a substituted or unsubstituted C6-C30 aryl, a substituted or unsubstituted C2-C30 heterocyclic group, a cyano group, or a halogen, and can be, for example, hydrogen, deuterium, a substituted or unsubstituted methyl, a substituted or unsubstituted ethyl, a substituted or unsubstituted phenyl, a substituted or unsubstituted biphenyl, or a substituted or unsubstituted naphthyl.

[0084] In one embodiment, the first compound represented by Chemical Formula 1b can be represented, for example, by Chemical Formula 1b-1, and the first compound represented by Chemical Formula 1c can be represented, for example, by Chemical Formula 1c-1.

[0085] [Chemical Formula 1b-1]

[0086]

[0087] [Chemical Formula 1c-1]

[0088]

[0089] In one embodiment, in Chemical Formulas 1, 1a, 1b, 1c, 1a-1, 1b-1, and 1c-1, at least one of each substituent may be substituted with deuterium or include deuterium. The number of substituted deuterium atoms may be from 1 to the maximum number of hydrogens in the chemical formula, for example, from 1 to 40 or from 1 to 30.

[0090] In one embodiment, the second compound may be represented by, for example, one of Chemical Formulas 2a to 2d.

[0091] [Chemical Formula 2a]

[0092]

[0093] [Chemical Formula 2b]

[0094]

[0095] [Chemical Formula 2c]

[0096]

[0097] [Chemical Formula 2d]

[0098]

[0099] In Chemical Formulas 2a to 2d, L 8 , Ar 7 , R 30 to R 33 , R 34 ', R 34 ", R 34 "', and R 35 to R 42 may be defined as the same as those described above.

[0100] In one embodiment, in Chemical Formula 2 and Chemical Formulas 2a to 2d, L 8 may be, for example, a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, or a substituted or unsubstituted terphenylene.

[0101] In one embodiment, in Chemical Formula 2 and Chemical Formulas 2a to 2d, Ar 7It may be, for example, a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthryl group, a substituted or unsubstituted terphenylene group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted benzothienyl group, a substituted or unsubstituted dibenzothienyl group, a substituted or unsubstituted benzofuranyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted benzosilolyl group, a substituted or unsubstituted dibenzosilolyl group, or a substituted or unsubstituted fluorenyl group.

[0102] In one embodiment, in Formula 2 and Formulas 2a to 2d, R 30 to R 33 、R 34 ', R 34 ”, R 34 ”', and R 35 to R 42 may each independently be, for example, hydrogen, deuterium, a substituted or unsubstituted methyl group, a substituted or unsubstituted ethyl group, a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted benzothienyl group, a substituted or unsubstituted dibenzothienyl group, a substituted or unsubstituted benzofuranyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted benzosilolyl group, a substituted or unsubstituted dibenzosilolyl group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted silyl group, or a cyano group.

[0103] In one embodiment, at least one of Ar 7 , R 30 to R 33 , R 34 ', R 34 ”, R 34 ”', and R 35 to R 42 may be, for example, a substituted or unsubstituted carbazolyl group.

[0104] In one embodiment, in Formula 2 and Formulas 2a to 2d, at least one of each substituent may be substituted with deuterium. The number of substituted deuterium atoms may be from 1 to the maximum number of hydrogens in the formula, for example, from 1 to 40 or from 1 to 30.

[0105] In one embodiment, the first compound may include, for example, a compound of Group 1-1, 1-2, or 1-3.

[0106] [Group 1-1]

[0107]

[0108]

[0109]

[0110] [Group 1-2]

[0111]

[0112]

[0113]

[0114]

[0115]

[0116]

[0117]

[0118]

[0119]

[0120] In one embodiment, the second compound may include, for example, the compounds of Group 2.

[0121] [Group 2]

[0122]

[0123]

[0124]

[0125]

[0126]

[0127]

[0128] (Dn represents the number of hydrogen atoms replaced by deuterium and represents the structure in which one or more deuterium atoms are substituted).

[0129] The composition for an organic optoelectronic device may contain the first compound and the second compound in various ratios (e.g., mixed).

[0130] In one embodiment, the composition for an organic optoelectronic device may contain the first compound and the second compound in a weight ratio of about 10:90 to about 90:10 (e.g., about 20:80 to about 80:20, about 30:70 to about 70:30, about 40:60 to about 60:40, or about 50:50).

[0131] In one embodiment, the first compound may be included in an amount equal to or greater than that of the second compound. In one embodiment, based on the total weight of the first compound and the second compound, the first compound may be included in an amount of about 50 wt% to about 90 wt%.

[0132] In one embodiment, the first compound may be included in an amount less than or the same as that of the second compound. In one embodiment, based on the total weight of the first compound and the second compound, the first compound may be included in an amount of about 10 wt% to about 50 wt%.

[0133] In one embodiment, in addition to the first compound and the second compound, the composition for an organic optoelectronic device may further include a luminescent dopant.

[0134] A luminescent dopant is a material that is mixed in a small amount with the composition for an organic optoelectronic device to promote luminescence, and may be a material such as a metal complex that emits light by being excited to a triplet state or more states multiple times. The luminescent dopant may be, for example, an inorganic, organic, or organic / inorganic compound, and may be included in one or two or more types.

[0135] The luminescent dopant may be, for example, a phosphorescent sensitizer, a fluorescent dopant, or a combination thereof.

[0136] The phosphorescent sensitizer may be an organometallic compound and may effectively transfer the energy received from the host to the fluorescent dopant. The phosphorescent sensitizer may contribute to increasing the energy transfer to the fluorescent dopant, causing the excitons formed in the light-emitting layer to emit light rapidly inside the light-emitting layer, thereby reducing the deterioration of the light-emitting diode.

[0137] The phosphorescent sensitizer may be, for example, an organometallic compound including iridium (Ir), platinum (Pt), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb), thulium (Tm), rhodium (Rh), or a combination thereof, and may be an organometallic compound including an organic ligand, the organic ligand containing a nitrogen-containing ring. The nitrogen-containing ring may be, for example, a substituted or unsubstituted pyridine, a substituted or unsubstituted pyrimidine, a substituted or unsubstituted triazine, a substituted or unsubstituted carbazole, a substituted or unsubstituted imidazole, a substituted or unsubstituted benzimidazole, or a combination thereof.

[0138] In one embodiment, the phosphorescent sensitizer may be, for example, one of Compounds P1 to P52.

[0139]

[0140]

[0141]

[0142] The fluorescent dopant may be, for example, a polycyclic compound, and may improve the luminous efficiency and lifetime characteristics of a light-emitting diode by receiving the energy transferred within the light-emitting layer due to high absorbance.

[0143] The fluorescent dopant may be, for example, a condensed polycyclic compound including boron (B), nitrogen (N), or a combination thereof. In one embodiment, the fluorescent dopant may be, for example, one of Compounds D1 to D30.

[0144]

[0145]

[0146]

[0147] Based on the total weight of the composition for an organic optoelectronic device, the phosphorus photosensitizer and the fluorescent dopant may each be included in an amount of less than or equal to about 20 wt% (e.g., about 0.1 wt% to about 20 wt%, about 0.1 wt% to about 15 wt%, about 0.1 wt% to about 10 wt%, about 0.1 wt% to about 7 wt%, about 0.1 wt% to about 5 wt%, about 0.1 wt% to about 4 wt%, about 1 wt% to about 20 wt%, about 1 wt% to about 15 wt%, about 1 wt% to about 10 wt%, about 1 wt% to about 7 wt%, about 1 wt% to about 5 wt%, or about 1 wt% to about 4 wt%).

[0148] In one embodiment, the composition for an organic optoelectronic device may further include additives, such as, for example, an organic material, an inorganic material, an organic / inorganic material, or a combination thereof.

[0149] Hereinafter, an organic optoelectronic device using the above-described composition for an organic optoelectronic device will be described.

[0150] The organic optoelectronic device may be, for example, an organic light-emitting diode, an organic optoelectronic device, or an organic solar cell. In one embodiment, the organic optoelectronic device may be an organic light-emitting diode.

[0151] The organic optoelectronic device may include an anode and a cathode facing each other and an organic layer between the anode and the cathode, and the organic layer may include the above-described composition. The organic layer may include an active layer such as a light-emitting layer or a light-absorbing layer, and the above-described composition may be included in the active layer. The organic layer may include a secondary layer between the anode and the active layer and / or between the cathode and the active layer, and the above-described composition may be included in the secondary layer.

[0152] Figure 1It is a cross-sectional view showing an example of an organic light-emitting diode (which is an example of an organic optoelectronic device) according to some embodiments.

[0153] Referring Figure 1 , an organic light-emitting diode 100 according to some embodiments may include an anode 110 and a cathode 120 facing each other and a light-emitting layer 130 between the anode 110 and the cathode 120.

[0154] The anode 110 may be made of a conductor having a high work function to facilitate hole injection, and may be made of, for example, a metal, a metal oxide, or a conductive polymer. The anode 110 may be made of: a metal such as nickel, platinum, vanadium, chromium, copper, zinc, gold, or an alloy thereof; a metal oxide such as zinc oxide, indium oxide, indium tin oxide (ITO), or indium zinc oxide (IZO); a combination of a metal and an oxide such as ZnO and Al or SnO2 and Sb; or a conductive polymer such as poly(3-methylthiophene), poly(3,4-(ethylenedioxy)thiophene) (PEDOT), polypyrrole, or polyaniline.

[0155] The cathode 120 may be made of a conductor having a low work function to facilitate electron injection, and may be made of, for example, a metal, a metal oxide, or a conductive polymer. The cathode 120 may be made of: a metal such as magnesium, calcium, sodium, potassium, titanium, indium, yttrium, lithium, gadolinium, aluminum, silver, tin, lead, cesium, barium, or an alloy thereof; or a multilayer structure material such as LiF / Al, LiO2 / Al, LiF / Ca, or BaF2 / Ca.

[0156] The light-emitting layer 130 may contain the above-described composition for an organic optoelectronic device as a host. The light-emitting layer 130 may also contain another organic compound as a host. The light-emitting layer 130 may also contain the above-described light-emitting dopant and may contain a fluorescent dopant, a phosphorescent sensitizer, or a combination thereof as described above. In one embodiment, by combining the above-described composition for an organic optoelectronic device and a light-emitting dopant, the light-emitting layer 130 may emit light in a blue emission spectrum. At least one of the first compound and the second compound of the above-described composition for an organic optoelectronic device has a high triplet energy level of greater than or equal to about 2.8 eV, such that the transfer of excitons to the dopant emitting blue light may be easy, and thus an organic optoelectronic device with high efficiency and long lifetime may be achieved. The peak wavelength of the blue emission spectrum may fall within, for example, about 410 nm to about 480 nm, about 420 nm to about 470 nm, or about 430 nm to about 470 nm.

[0157] As described above, the composition for an organic optoelectronic device contains a first compound and a second compound. The first compound is a bipolar compound with relatively strong electron transport characteristics, and the second compound is a compound with relatively strong hole transport characteristics. Compared with the case of using the first compound alone or the second compound alone, the luminous efficiency can be improved by increasing the balance of electrons and holes in the light-emitting layer 130. At the same time, the lifetime can be improved by reducing the non-combined charge caused by the imbalance of the mobilities of electrons and holes.

[0158] In one embodiment, in the organic light-emitting diode 100 including a light-emitting layer 130 using the composition for an organic optoelectronic device as a mixed host, the holes and electrons injected from the anode 110 and the cathode 120 can be appropriately distributed in the light-emitting layer 130, the mobility can be finely controlled to an appropriate level, and the exciton generation in the light-emitting layer 130 can be strongly induced, thereby improving the luminous efficiency of the light-emitting layer 130.

[0159] In one embodiment, it is possible to reduce or prevent the generation of excitons at inappropriate positions (such as the interface between the light-emitting layer 130 and an adjacent layer) and / or the accumulation of non-combined charge at the interface between the light-emitting layer 130 and an adjacent layer due to the difference in the mobilities of the holes and electrons respectively injected from the anode 110 and the cathode 120 in the light-emitting layer 130.

[0160] In one embodiment, it is possible to reduce or prevent the roll-off phenomenon in which the luminous efficiency of the organic light-emitting diode 100 rapidly decreases due to non-luminescent excitons and / or non-combined charge, thereby ultimately improving the lifetime of the organic light-emitting diode 100.

[0161] The organic light-emitting diode 100 can be manufactured by forming the anode 110 or the cathode 120 on a substrate, forming the light-emitting layer using a dry film-forming method (such as vacuum evaporation, sputtering, plasma plating, and ion plating), and forming the cathode 120 or the anode 110 thereon.

[0162] Figure 2 It is a cross-sectional view showing another example of an organic light-emitting diode (which is an example of an organic optoelectronic device) according to some embodiments.

[0163] Refer to Figure 2, similar to the above-described embodiments, the organic light-emitting diode 100 according to an embodiment of the present invention may include an anode 110, a cathode 120, and a light-emitting layer 130. The organic light-emitting diode 100 according to an embodiment of the present invention may further include a hole transport layer 140, a hole transport assisting layer 150, and an electron transport layer 160.

[0164] The hole transport layer 140 may be between the anode 110 and the light-emitting layer 130, and the hole transport assisting layer 150 may be between the light-emitting layer 130 and the hole transport layer 140. The electron transport layer 160 may be between the cathode 120 and the light-emitting layer 130.

[0165] The hole transport layer 140 may facilitate the transfer of holes from the anode 110 to the light-emitting layer 130, and may include, for example, an amine compound. In one embodiment, the amine compound may have at least one aryl or heteroaryl group having hole characteristics. In one embodiment, the amine compound may be represented by, for example, Chemical Formula 6a or 6b.

[0166]

[0167] In Chemical Formulas 6a and 6b, Ar a to Ar g may each independently be, for example, hydrogen, deuterium, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, or a combination thereof.

[0168] In one embodiment, at least one of Ar a to Ar c and at least one of Ar d to Ar g may be a substituted or unsubstituted C6 to C30 aryl group, a substituted or unsubstituted C2 to C30 heteroaryl group, or a combination thereof.

[0169] Ar h may be, for example, a single bond, a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C6 to C30 arylene group, a substituted or unsubstituted C2 to C30 heteroarylene group, or a combination thereof.

[0170] The hole transport auxiliary layer 150 can form an interface with the light-emitting layer 130 by being positioned between the hole transport layer 140 and the light-emitting layer 130 and in contact with the light-emitting layer 130. The hole transport auxiliary layer 150 can help further reduce or prevent the generation of excitons at inappropriate positions (such as at the interface between the above-mentioned light-emitting layer 130 and an adjacent layer) and / or the accumulation of unbound charges at the interface between the light-emitting layer 130 and an adjacent layer. Therefore, the roll-off phenomenon in which the luminous efficiency of the organic light-emitting diode 100 rapidly decreases due to non-light-emitting excitons or unbound charges can be further reduced or prevented, and thus the lifespan of the organic light-emitting diode 100 can be ultimately improved.

[0171] The electron transport layer 160 can help further increase the electron injection or electron mobility between the cathode 120 and the light-emitting layer 130 and block holes.

[0172] The electron transport layer 160 can include, for example, a compound of Group 5.

[0173] [Group 5]

[0174]

[0175]

[0176]

[0177] The organic optoelectronic device including the above-mentioned organic light-emitting diode can be applied to a display device.

[0178] The following examples and comparative examples are provided to highlight the features of one or more embodiments, but it will be understood that the examples and comparative examples should not be construed as limiting the scope of the embodiments, and the comparative examples should not be construed as being outside the scope of the embodiments. Further, it will be understood that the embodiments are not limited to the specific details described in the examples and comparative examples.

[0179] Hereinafter, starting materials and reactants used in the examples and synthesis examples are purchased from Sigma-Aldrich Co., Ltd., TCI Inc., Tokyo chemical industry, or P&H tech or synthesized by known methods unless otherwise specified.

[0180] Preparation of Compounds for Organic Optoelectronic Devices

[0181] The compound is synthesized through the following steps.

[0182] (Synthesis of the First Compound)

[0183] Synthesis Example 1: Synthesis of Compound A-47

[0184] [Reaction formula 1]

[0185]

[0186] Compound A-47 was synthesized using Int-1 (CAS No. 1268244-56-9) and Int-2 (CAS No. 1696425-27-0) by referring to the method described in Korean Patent Publication No. 10-2017-0060836.

[0187] Synthesis Example 2: Synthesis of Compound B-19

[0188] [Reaction formula 2]

[0189]

[0190] Compound B-19 was synthesized using Int-1 (CAS No. 1268244-56-9) and Int-3 (CAS No. 2745119-67-7) by referring to the method described in Korean Patent No. 10-2044943.

[0191] Synthesis Example 3: Synthesis of Compound C-34

[0192] [Reaction formula 3]

[0193]

[0194] Compound C was synthesized using Int-4 (CAS No. 307929-32-4) and Int-5 (CAS No. 1346669-46-2) by referring to the method described in Korean Patent Publication No. 10-2013-0011955.

[0195] Synthesis Example 4: Synthesis of Compound C-38

[0196] [Reaction formula 4]

[0197]

[0198] Compound C-38 was synthesized using Int-4 (CAS No. 307929-32-4) and Int-6 (CAS No. 1346669-45-1) by referring to the method described in Korean Patent Publication No. 10-2013-0011955.

[0199] Synthesis Example 5: Synthesis of Compound B-37

[0200] [Reaction formula 5]

[0201]

[0202] Compound B-37 was synthesized using Int-7 (CAS No. 2102445-28-1) and Int-8 (CAS No. 1201561-34-3) by referring to the method described in Korean Patent No. 10-2044943.

[0203] (Synthesis of the Second Compound)

[0204] Synthesis Example 6: Synthesis of Compound D-72

[0205] [Reaction Scheme 6]

[0206]

[0207] Compound D-72 was synthesized by referring to the method disclosed in Korean Patent Publication No. 10-2023-0155972.

[0208] Comparative Synthesis Example 1: Synthesis of Compound HT-1

[0209]

[0210] Comparative Compound HT-1 was synthesized by referring to the method described in Korean Patent Publication No. 10-2023-0037447.

[0211] Manufacture of Organic Light-Emitting Diodes

[0212] Example 1

[0213] A glass substrate coated with an ITO (indium tin oxide) film was ultrasonically cleaned with distilled water. After washing with distilled water, the glass substrate was ultrasonically washed with isopropyl alcohol, acetone, or methanol and dried, then transferred to a plasma cleaner and cleaned with oxygen plasma for 10 minutes, and then transferred to a vacuum deposition apparatus. The prepared ITO transparent electrode was used as the anode, and Compound A doped with 3% NDP-9 (Novaled GmbH) was vacuum deposited on the ITO substrate to form a thick hole injection layer, and Compound A was deposited on the hole injection layer to a thickness to form a hole transport layer. mCP (1,3-bis(carbazol-9-yl)benzene) was deposited on the hole transport layer to a thickness to form a hole transport auxiliary layer. On the hole transport auxiliary layer, Compound A-47 obtained in Synthesis Example 1 and Compound D-72 obtained in Synthesis Example 6 were used as hosts simultaneously, doped with 13 wt% of P31 as a phosphorescent sensitizer, and doped with 1.5 wt% of D3 as a fluorescent dopant to form by vacuum deposition Thick light-emitting layer. Herein, Compound A-47 and Compound D-72 are used at a weight ratio of 4:6. Subsequently, BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline) is deposited on the light-emitting layer to a thickness to form an electron transport assisting layer, and at the same time, Compound B and LiQ are vacuum-deposited at a weight ratio of 1:1 to form a thick electron transport layer. An organic light-emitting diode is fabricated by sequentially vacuum-depositing of LiQ and of Al on the electron transport layer to form a cathode.

[0214] ITO / Compound A (3% doped with NDP-9, ) / Compound A / mCP / EML [host (Compound A-47:Compound D-72):P31:D3 = 85.5 wt%:13 wt%:1.5 wt%] / BCP / Compound B:LiQ / LiQ / Al

[0215]

[0216] Compound A: N-(9,9-diphenyl-9H-fluoren-2-yl)-N,9-diphenyl-9H-carbazol-2-amine Compound B: 8-{4-[bis(naphthalen-2-yl)-1,3,5-triazin-2-yl]phenyl}quinoline

[0217]

[0218] Example 2

[0219] An organic light-emitting diode is fabricated in the same manner as in Example 1, except that Compound B-19 obtained in Synthesis Example 2 and Compound D-72 obtained in Synthesis Example 6 are used instead of Compound A-47 obtained in Synthesis Example 1 and Compound D-72 synthesized in Synthesis Example 6 as the host of the light-emitting layer to form the light-emitting layer.

[0220] Example 3

[0221] An organic light-emitting diode is fabricated in the same manner as in Example 1, except that Compound C-34 obtained in Synthesis Example 3 and Compound D-72 obtained in Synthesis Example 6 are used instead of Compound A-47 obtained in Synthesis Example 1 and Compound D-72 synthesized in Synthesis Example 6 as the host of the light-emitting layer to form the light-emitting layer.

[0222] Example 4

[0223] An organic light-emitting diode was fabricated in the same manner as in Example 1, except that Compound B-37 obtained in Synthesis Example 5 and Compound D-72 obtained in Synthesis Example 6 were used instead of Compound A-47 obtained in Synthesis Example 1 and Compound D-72 synthesized in Synthesis Example 6 as the host of the light-emitting layer to form the light-emitting layer.

[0224] Comparative Example 1

[0225] An organic light-emitting diode was fabricated in the same manner as in Example 1, except that Compound A-47 obtained in Synthesis Example 1 and Compound HT-1 obtained in Comparative Synthesis Example 1 were used instead of Compound A-47 obtained in Synthesis Example 1 and Compound D-72 synthesized in Synthesis Example 6 as the host of the light-emitting layer to form the light-emitting layer.

[0226] Evaluation

[0227] The lifetime characteristics of the organic light-emitting diodes according to Examples 1 to 4 and Comparative Example 1 were evaluated.

[0228] The lifetime was evaluated by the time it took to maintain the luminance (cd / m 2 ) at 2,000 cd / m 2 and reduce the current efficiency (cd / A) to 95%.

[0229] The measured lifetimes of Examples 1 to 4 and Comparative Example 1 were calculated as relative values based on Comparative Example 1 and are shown in Table 1.

[0230] Table 1

[0231]

[0232] Referring to Table 1, the lifetime characteristics of the organic light-emitting diodes according to Examples 1 to 4 were improved compared to the organic light-emitting diode according to Comparative Example 1.

[0233] One or more embodiments can provide a composition for an organic optoelectronic device, which can achieve high efficiency and long lifetime characteristics.

[0234] An organic optoelectronic device with high efficiency and long lifetime can be achieved.

[0235] Exemplary embodiments have been disclosed herein, and although specific terms are employed, they are used and interpreted in a generic and descriptive sense only and not for purposes of limitation. In some instances, as will be apparent to those of ordinary skill in the art as of the filing date of this application, features, characteristics and / or elements described in connection with a particular embodiment may be used separately, or may be used in combination with features, characteristics and / or elements described in connection with other embodiments, unless otherwise expressly indicated. Accordingly, it will be understood by those of skill in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention as set forth in the appended claims.

Claims

1. A composition for an organic optoelectronic device, the composition comprising: a first compound represented by Chemical Formula 1; and a second compound represented by Chemical Formula 2: [Chemical Formula 1] In Chemical Formula 1, Z 1 to Z 3 each independently is N or CR a , Z 1 from Z 3 at least two of which are N, L 1 and L 2 each independently is a single bond, a substituted or unsubstituted C6 to C30 arylene group or a substituted or unsubstituted divalent C2 to C30 heterocyclic group, L 3 is a single bond or a substituted or unsubstituted C6-C30 arylene group, Ar 1 and Ar 2 each independently is a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C2-C30 heterocyclic group, or a substituted or unsubstituted silyl group, R 1 to R 8 and R a each independently is hydrogen, deuterium, a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C2-C30 heterocyclic group, a substituted or unsubstituted amino group, a substituted or unsubstituted silyl group, a cyano group or a halogen, and R 1 to R 8 each exist separately or two of the adjacent combinations form a ring [Chemical Formula 2] In Chemical Formula 2, L 7 and L 8 each independently is a single bond or a substituted or unsubstituted C6-C30 arylene group, Ar 7 is a substituted or unsubstituted C6-C30 aryl or a substituted or unsubstituted C2-C30 heterocyclic group, and R 30 to R 33 、R 34 ', R 34 ”, R 34 ”', and R 35 to R 42 each independently is hydrogen, deuterium, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C2-C30 heterocyclic group, a substituted or unsubstituted amino group, a substituted or unsubstituted silyl group, a cyano group or a halogen.

2. The composition for an organic optoelectronic device according to claim 1, wherein, Ar 1 and Ar 2 each independently is a substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted anthryl, substituted or unsubstituted phenanthryl, substituted or unsubstituted terphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted benzofuranyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted benzothiophenyl, substituted or unsubstituted dibenzothiophenyl, substituted or unsubstituted benzosilolyl, substituted or unsubstituted dibenzosilolyl, substituted or unsubstituted pyridyl, substituted or unsubstituted pyrimidinyl, substituted or unsubstituted triazinyl or their fused rings.

3. The composition for an organic optoelectronic device according to claim 1, wherein, Ar 1 、 Ar 2 and R 1 to R 8 At least one of them is a substituted or unsubstituted benzofuranyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted benzothiophenyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted triazinyl or their fused rings.

4. The composition for an organic optoelectronic device according to claim 3, wherein: Ar 1 is a substituted or unsubstituted benzofuranyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted benzothiophenyl, substituted or unsubstituted dibenzothiophenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted triazinyl or their fused rings, L 3 is a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene or a substituted or unsubstituted naphthylene, and R 1 to R 8 and R a each independently is hydrogen, deuterium, a substituted or unsubstituted C1-C20 alkyl group, or a substituted or unsubstituted C6-C30 aryl group.

5. The composition for an organic optoelectronic device according to claim 4, wherein, L 1 is a single bond.

6. The composition for an organic optoelectronic device according to claim 3, wherein: R 1 to R 8 at least one of which is a substituted or unsubstituted benzofuranyl, a substituted or unsubstituted dibenzofuranyl, a substituted or unsubstituted benzothiophenyl, a substituted or unsubstituted dibenzothiophenyl, a substituted or unsubstituted carbazolyl, a substituted or unsubstituted triazinyl or their fused rings, L 3 is a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, or a substituted or unsubstituted naphthylene, and Ar 1 and Ar 2 each independently is a substituted or unsubstituted phenyl, a substituted or unsubstituted biphenyl, a substituted or unsubstituted terphenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted anthryl, a substituted or unsubstituted phenanthryl or a substituted or unsubstituted terphenylene.

7. The composition for an organic optoelectronic device according to claim 1, wherein: the second compound is represented by one of Chemical Formulas 2a to 2d: [Chemical Formula 2a] [Chemical Formula 2b] [Chemical Formula 2c] [Chemical Formula 2d] In Chemical Formulas 2a to 2d, L 8 , Ar 7 , R 30 to R 33 , R 34 ', R 34 ", R 34 "', and R 35 to R 42 are defined to be the same as those in Chemical Formula 2.

8. The composition for an organic optoelectronic device according to claim 7, wherein: L 8 is a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene or a substituted or unsubstituted terphenylene, and Ar 7 is a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthryl group, a substituted or unsubstituted terphenylene group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted benzothiophenyl group, a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted benzofuranyl group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted benzosilolyl group, a substituted or unsubstituted dibenzosilolyl group or a substituted or unsubstituted fluorenyl group.

9. The composition for an organic optoelectronic device according to claim 1, wherein, the first compound and the second compound are included in a weight ratio of 10:90 to 90:

10.

10. An organic optoelectronic device, comprising: an anode and a cathode facing each other, and a light-emitting layer between the anode and the cathode, wherein the light-emitting layer contains the composition for an organic optoelectronic device according to any one of claims 1 to 9.

11. The organic optoelectronic device according to claim 10, wherein, The light-emitting layer further contains a fluorescent dopant, a phosphorescent sensitizer, or a combination thereof.

12. The organic optoelectronic device according to claim 11, wherein: the phosphorescent sensitizer is an organometallic compound, and the fluorescent dopant is a condensed polycyclic compound containing boron, nitrogen, or a combination thereof.

13. The organic optoelectronic device according to claim 10, wherein, The light-emitting layer emits light in a blue emission spectrum.

14. The organic optoelectronic device according to claim 10, further comprising: a hole transport layer between the anode and the light-emitting layer, and a hole transport auxiliary layer between the light-emitting layer and the hole transport layer.

15. A display device, comprising the organic optoelectronic device according to any one of claims 10 to 14.

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