Light emitting device and electronic apparatus including the same

Abstract

A light-emitting device is provided, comprising: a first electrode; a second electrode facing the first electrode; and an intermediate layer disposed between the first electrode and the second electrode and including a light-emitting layer; wherein the light-emitting layer comprises a first host, a second host, a first dopant, and a second dopant, wherein the first host is a hole-transporting compound, the second host is an electron-transporting compound, the first dopant is a phosphorescent dopant, and the second dopant is a delayed fluorescence dopant, wherein the first host, the second host, the first dopant, and the second dopant are each different from one another, satisfying the following, wherein the spectral overlap integral of the emission spectrum of the first dopant and the absorption spectrum of the second dopant is 0.5 X 10¹⁴M⁻¹cm⁻¹nm⁴ or greater, and the spectral overlap integral is evaluated by the following: T1(D1) ≤ S1(D2) Refer to the description of the above and as set forth in this specification.

Description

Technology Field

[0001] The invention relates to a light-emitting element and an electronic device including the light-emitting element. Background Technology

[0002] Among light-emitting devices, organic light-emitting devices are self-emissive devices that, compared to conventional devices, not only have a wide viewing angle and excellent contrast, but also have a fast response time and excellent characteristics in terms of brightness, driving voltage, and response speed.

[0003] The above organic light-emitting device may have a structure in which a first electrode is disposed on a substrate, and a hole transport region, an emissive layer, an electron transport region, and a second electrode are sequentially formed on the first electrode. Holes injected from the first electrode move to the emissive layer via the hole transport region, and electrons injected from the second electrode move to the emissive layer via the electron transport region. Carriers such as holes and electrons recombine in the emissive layer region to generate excitons. Light is generated as these excitons change from an excited state to a ground state. The problem to be solved

[0004] The invention provides a light-emitting device having low driving voltage, high color purity, excellent luminous efficiency, and a long lifespan. means of solving the problem

[0005] According to one aspect, a first electrode;

[0006] A second electrode facing the first electrode;

[0007] An intermediate layer disposed between the first electrode and the second electrode and including a light-emitting layer;

[0008] The light-emitting layer comprises a first host, a second host, a first dopant, and a second dopant, and

[0009] The above first host is a hole-transporting compound, and

[0010] The above second host is an electron transportable compound, and

[0011] The above first dopant is a phosphorescent dopant, and

[0012] The above second dopant is a delayed fluorescence dopant, and

[0013] The above-mentioned first host, second host, first dopant, and second dopant are different from each other, and

[0014] Satisfying the following <Equation 1>,

[0015] The spectral overlap integral of the emission spectrum of the first dopant and the absorption spectrum of the second dopant is 0.5 x 10⁻⁶ 14 M -1 cm -1 nm 4 That is all,

[0016] The above spectrum overlap integral value is a light-emitting element evaluated by the following <Equation 2>:

[0017] <Equation 1>

[0018] T1(D1) ≤ S1(D2)

[0019] Among the above Equation 1,

[0020] T1(D1) is the lowest excited triplet energy level of the first dopant, and

[0021] S1(D2) is the lowest excited singlet energy level of the second dopant, and

[0022] The above T1 (D1) is a value obtained by measuring the low-temperature (4K) emission spectrum and the room-temperature (300K) emission spectrum of the first dopant, respectively, and then analyzing the peaks observed only in the low-temperature emission spectrum by comparing them with the room-temperature emission spectrum.

[0023] The above S1(D2) is a value obtained by converting the maximum emission wavelength (nm) of the peak at which the emission intensity of the room temperature emission spectrum is maximum after measuring the room temperature (300K) emission spectrum of the second dopant, and

[0024] <Equation 2>

[0025]

[0026] Among the above Equation 2,

[0027] J(λ) is M -1 cm -1 nm 4 in units of M -1 cm -1 nm 4 ), and is the spectral overlap integral value of the emission spectrum of the first dopant and the absorption spectrum of the second dopant,

[0028] ε(λ) is, M -1 cm -1 It is the molar extinction coefficient of the second dopant calculated from the absorption spectrum of the second dopant, of the unit, and

[0029] λ is the wavelength of the emission spectrum and the absorption spectrum in units of nm, and

[0030] F D (λ) is the wavelength-dependent emission spectrum of the first dopant normalized to an area of ​​1, and

[0031] The emission spectrum of the first dopant is the emission spectrum evaluated at room temperature for a 10 μM toluene solution of the first dopant, and

[0032] The absorption spectrum of the second dopant above is the absorption spectrum evaluated at room temperature for a 10 μM toluene solution of the second dopant above.

[0033] According to another aspect, an electronic device including the light-emitting element is provided. Effects of the invention

[0034] The above-mentioned light-emitting element has a low driving voltage, excellent color purity and luminous efficiency, and a long lifespan, so it can be used in the fabrication of high-quality electronic devices. Brief explanation of the drawing

[0035] FIG. 1 is a schematic diagram showing the structure of a light-emitting element according to one embodiment. FIG. 2 is a schematic diagram showing the structure of an electronic device according to one embodiment. FIG. 3 is a schematic diagram showing the structure of an electronic device according to another embodiment. Figure 4a is a graph showing the emission spectrum of compound D1-1 (D1-1), the emission spectrum of D2-1 (D2-1), and the absorption spectrum (D2-1(Abs)). Figure 4b is a graph showing the emission spectrum of compound D1-1 (D1-1), the emission spectrum of D2-3 (D2-3), and the absorption spectrum (D2-3(Abs)). Specific details for implementing the invention

[0036] The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described below in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various forms.

[0037] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted.

[0038] In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component.

[0039] In the following embodiments, singular expressions include plural expressions unless the context clearly indicates otherwise.

[0040] In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification exist, and do not preclude the possibility that one or more other features or components may be added.

[0041] In the following embodiments, when various components such as layers, films, regions, and plates are described as being "on" another component, this includes not only cases where they are "directly on" another component, but also cases where another component is interposed between them.

[0042] In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, so the present invention is not necessarily limited to what is illustrated.

[0043] In this specification, the phrase “(the intermediate layer) comprises a compound represented by Chemical Formula 1” may be interpreted as “(the intermediate layer) may comprise one compound belonging to the category of Chemical Formula 1 or two or more different compounds belonging to the category of Chemical Formula 1.”

[0044] According to one aspect, a light-emitting element may be provided comprising: a first electrode; a second electrode facing the first electrode; and an intermediate layer disposed between the first electrode and the second electrode and including a light-emitting layer, wherein the light-emitting layer includes a first host, a second host, a first dopant, and a second dopant.

[0045] Among the light-emitting elements, the first host may be a hole-transporting compound.

[0046] Among the light-emitting elements, the second host may be an electron transport compound.

[0047] Among the above light-emitting elements, the first dopant may be a phosphorescent dopant. That is, the first dopant may be any compound capable of emitting phosphorescence according to a phosphorescent emission mechanism.

[0048] Among the above light-emitting elements, the second dopant may be a delayed fluorescence dopant. That is, the second dopant may be selected from any compound capable of emitting delayed fluorescence by a delayed fluorescence emission mechanism.

[0049] The above first host, second host, first dopant, and second dopant may each be different from one another.

[0050] For specific descriptions of each of the above-mentioned first host, second host, first dopant, and second dopant, refer to the description below.

[0051] According to one embodiment, the emission peak wavelengths in the emission spectra of the first dopant and the second dopant may be independently 440 nm or greater and 470 nm or less. The emission peak wavelengths in the emission spectra of the first dopant and the second dopant may be those observed from the emission spectra of the first dopant and the second dopant evaluated by the method described in this specification.

[0052] According to one embodiment, the emission peak wavelength in the emission spectrum of the first dopant may be the same as or longer than the emission peak wavelength in the emission spectrum of the second dopant. For example, the difference between the emission peak wavelength in the emission spectrum of the first dopant and the emission peak wavelength in the emission spectrum of the second dopant may be 0 nm or more and 10 nm or less.

[0053] According to one embodiment, an exciton is transitioned from the lowest excited triplet energy level (T1) of the first dopant to the lowest excited singlet energy level (S1) of the second dopant, and light can be emitted as the exciton at the lowest excited singlet energy level (S1) of the second dopant is transitioned to the ground state.

[0054] According to one embodiment, among the total light-emitting components emitted from the light-emitting layer, the ratio of the light-emitting component emitted from the second dopant may be 30% or more, for example, 30% or more and 100% or less, 30% or more and 90% or less, 40% or more and 100% or less, 40% or more and 90% or less, 50% or more and 100% or less, 60% or more and 100% or less, 70% or more and 100% or less, 80% or more and 100% or less, or 90% or more and 100% or less. Meanwhile, among the total light-emitting components emitted from the light-emitting layer, the ratio of the light-emitting component emitted from the first dopant may be less than 70%, for example, 0% or more and less than 70%, 0% or more and less than 60%, 0% or more and less than 50%, 0% or more and less than 40%, 0% or more and 30% or more, or 0% or more and less than 20%.

[0055] According to one embodiment, the light-emitting layer may emit blue light having CIEx color coordinates of 0.115 or higher and 0.140 or lower and CIEy color coordinates of 0.135 or higher and 0.160 or lower. According to another embodiment, the light-emitting layer may emit blue light having CIEx color coordinates of 0.120 or higher and 0.140 (e.g., 0.125 or higher and 0.135 or lower) and CIEy color coordinates of 0.135 or higher and 0.160 or lower (e.g., 0.140 or higher and 0.155 or lower). 30% or more, for example, 30% or more and 100% or less of the total light-emitting component of the blue light may be light emitted from the second dopant.

[0056] According to one embodiment, the sum of the content of the first dopant and the content of the second dopant may be less than the sum of the content of the first host and the content of the second host. The content may be in weight. For example, the sum of the content of the first dopant and the content of the second dopant may be 0.1 parts by weight or more and 30 parts by weight or less, 1 part by weight or more and 20 parts by weight or less, or 5 parts by weight or more and 15 parts by weight or less per 100 parts by weight of the light-emitting layer.

[0057] According to one embodiment, the weight ratio of the first dopant and the second dopant in the light-emitting layer may be in the range of 80:10 to 30:10, 80:10 to 40:10, 80:10 to 50:10, 80:10 to 60:10, 80:10 to 70:10, or 77:10 to 73:10. For example, the weight ratio of the first dopant and the second dopant in the light-emitting layer may be 75:10, but is not limited thereto.

[0058] According to one embodiment, the weight ratio of the first host and the second host in the light-emitting layer may be in the range of 1:9 to 9:1, 2:8 to 8:2, 3:7 to 7:3, 4:6 to 6:4, or 3:1 to 2:1. For example, the weight ratio of the first host and the second host in the light-emitting layer may be 3:1 to 2:1, but is not limited thereto.

[0059] According to one embodiment, the light-emitting layer may be composed of a first host, a second host, a first dopant, and a second dopant as described above.

[0060] The above light-emitting element can satisfy the following <Equation 1>:

[0061] <Equation 1>

[0062] T1(D1) ≤ S1(D2)

[0063] Among the above Equation 1,

[0064] T1(D1) is the lowest excited triplet energy level of the first dopant, and

[0065] S1(D2) is the lowest excited singlet energy level of the second dopant, and

[0066] The above T1 (D1) is a value obtained by measuring the low-temperature (4K) emission spectrum and the room-temperature (300K) emission spectrum of the first dopant, respectively, and then analyzing the peaks observed only in the low-temperature emission spectrum by comparing them with the room-temperature emission spectrum.

[0067] The above S1 (D2) is a value obtained by converting the maximum emission wavelength (nm) of the peak where the emission intensity of the room temperature emission spectrum is maximum, after measuring the room temperature (300K) emission spectrum of the second dopant.

[0068] According to one embodiment, the above <Equation 1> can be expressed as the following <Equation 1-1>.

[0069] <Equation 1-1>

[0070] T1(D1) < S1(D2)

[0071] In the above Equation 1-1,

[0072] For a description of T1(D1) and S1(D2), refer to <Equation 1>.

[0073] The spectral overlap integral of the emission spectrum of the first dopant and the absorption spectrum of the second dopant is 0.5 x 10⁻⁶ 14 M -1 cm -1 nm 4 It may be more than that. The above spectrum overlap integral value can be evaluated by the following <Equation 2>:

[0074] <Equation 2>

[0075]

[0076] Among the above Equation 2,

[0077] J(λ) is M -1 cm -1 nm 4 in units of M -1 cm -1 nm 4 ), and is the spectral overlap integral value of the emission spectrum of the first dopant and the absorption spectrum of the second dopant,

[0078] ε(λ) is, M -1 cm -1 It is the molar extinction coefficient of the second dopant calculated from the absorption spectrum of the second dopant, of the unit, and

[0079] λ is the wavelength of the emission spectrum and the absorption spectrum in units of nm, and

[0080] F D (λ) is the wavelength-dependent emission spectrum of the first dopant normalized to an area of ​​1, and

[0081] The emission spectrum of the first dopant is the emission spectrum evaluated at room temperature for a 10 μM toluene solution of the first dopant, and

[0082] The absorption spectrum of the second dopant above is the absorption spectrum evaluated at room temperature for a 10 μM toluene solution of the second dopant above.

[0083] According to one embodiment, the spectrum overlap integral value is 0.5 x 10 14 M -1 cm -1 nm 4 Above and 5.0 x 10 15 M -1 cm -1 nm 4Below, 0.5 x 10 14 M -1 cm -1 nm 4 Above and 2.0 x 10 15 M -1 cm -1 nm 4 Less than or equal to, or 0.5 x 10 14 M -1 cm -1 nm 4 Above and 5.0 x 10 14 M -1 cm -1 nm 4 It may be less than.

[0084] The light-emitting element comprises a first host and a second host that are different from each other. Since the first host is a hole-transporting compound and the second host is an electron-transporting compound, compared to a light-emitting element using a single host, charge balance can be controlled by controlling hole and electron transport, thereby increasing exciton formation in the light-emitting layer.

[0085] The light-emitting device comprises a first dopant, which is a phosphorescent dopant, and a second dopant, which is a delayed fluorescence dopant. As Forster resonance energy transfer (FRET) occurs from the phosphorescent dopant to the delayed fluorescence dopant and reverse intersystem crossing of the delayed fluorescence dopant is accelerated, the triplet exciton distribution in the delayed fluorescence dopant, which is the final light-emitting material, is reduced and quenching is substantially prevented, thereby enabling the realization of a light-emitting device having excellent luminescence efficiency and / or lifetime.

[0086] The light-emitting device has a lowest excitation triplet energy level of the first dopant that is less than or equal to the lowest excitation singlet energy of the second dopant (see Equation 1), but since there is overlap between the emission spectrum of the first dopant and the absorption spectrum of the second dopant, the FRET efficiency from the first dopant to the second dopant is improved, and the Forster radius of the second dopant relative to the first dopant is increased, so the luminescence efficiency (e.g., external quantum efficiency) and lifetime of the light-emitting device can be improved.

[0087] The light-emitting element has a spectral overlap integral value of the emission spectrum of the first dopant and the absorption spectrum of the second dopant of 0.5 x 10 14 M -1 cm -1 nm 4 As such, the exciton transfer efficiency from the first dopant to the second dopant is improved, and the luminous efficiency and / or lifespan of the light-emitting device can be improved.

[0088] According to another embodiment,

[0089] The first electrode of the above-mentioned light-emitting element is an anode, and

[0090] The second electrode of the above-mentioned light-emitting element is a cathode, and

[0091] The above intermediate layer further includes a hole transport region disposed between the first electrode and the light-emitting layer and an electron transport region disposed between the light-emitting layer and the second electrode, and

[0092] The hole transport region above includes a hole injection layer, a hole transport layer, a light-emitting auxiliary layer, an electron blocking layer, or any combination thereof, and

[0093] The above electron transport region may include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0094] According to another embodiment, the light-emitting element may include a capping layer disposed on the outer side of the first electrode or the outer side of the second electrode.

[0095] According to another embodiment, the light-emitting element may further include at least one of a first capping layer disposed outside the first electrode and a second capping layer disposed outside the second electrode. For a more detailed description of the first capping layer and / or the second capping layer, refer to the description in this specification.

[0096] According to another aspect, an electronic device including a light-emitting element as described above is provided. The electronic device may further include a thin-film transistor. For example, the electronic device may further include a thin-film transistor including a source electrode and a drain electrode, and the first electrode of the light-emitting element may be electrically connected to the source electrode or the drain electrode. Meanwhile, the electronic device may further include a color filter, a color conversion layer, a touchscreen layer, a polarizing layer, or any combination thereof. A more detailed description of the electronic device is provided as described in this specification.

[0097] Description of Host 1 and Host 2

[0098] The first host may be a hole-transporting compound, and the second host may be an electron-transporting compound.

[0099] According to one embodiment, the hole-transporting compound may be a compound that does not contain an electron-transporting moiety, and the electron-transporting compound may be a compound that contains at least one electron-transporting moiety.

[0100] In this specification, "electron-transporting moiety" refers to a cyano group, a phosphine oxide group, a sulfoxide group, a sulfonate group, a π electron-deficient nitrogen-containing C1-C 60 cyclic group (π electron-deficient nitrogen-containing C1-C 60It may include cyclic groups, etc.), or any combination thereof.

[0101] According to another embodiment, the first host may be a compound represented by the following chemical formula 1:

[0102] <Chemical Formula 1>

[0103]

[0104] Among the above chemical formula 1,

[0105] X1 is O, S, N[(L 1a ) m1a -R3] or C(R3)(R4), and

[0106] L 1a is a single bond, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and

[0107] m1a is an integer from 0 to 5, and

[0108] X2 is a single bond, O, S, N(R5) or C(R5)(R6), and

[0109] Rings A1 and A2 independently of each other, C3-C 60 Carbocyclic group or C1-C 60 It is a heterocyclic group, and

[0110] R1 to R6 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, at least one R 10a C1-C substituted or unsubstituted 60 alkyl group, at least one R 10a C2-C substituted or unsubstituted 60 alkenyl group, at least one R 10a C2-C substituted or unsubstituted 60 alkynyl group, at least one R 10aC1-C substituted or unsubstituted 60 Alkoxy group, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, at least one R 10a C1-C substituted or unsubstituted 60 Heterocyclic group, at least one R 10a C6-C substituted or unsubstituted 60 aryloxy group, at least one R 10a C6-C substituted or unsubstituted 60 arylthio group, -Si(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2) or -P(=S)(Q1)(Q2), and

[0111] a1 and a2 are independently 1, 2, 3, 4, 5, or 6, and

[0112] The above R 10a Is,

[0113] Deuterium (-D), -F, -Cl, -Br, -I, hydroxyl group, cyano group, or nitro group;

[0114] Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 aryloxy group, C6-C 60 Arylthio group, -Si(Q 11 )(Q 12 )(Q 13 ), -N(Q 11 )(Q 12 ), -B(Q 11 )(Q 12 ), -C(=O)(Q 11 ), -S(=O)2(Q 11 ), -P(=O)(Q 11 )(Q 12), or substituted or unsubstituted with any combination thereof, C1-C 60 Alkyl group, C2-C 60 alkenyl group, C2-C 60 alkynyl group, or C1-C 60 Alkoxygenation;

[0115] Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1-C 60 Alkyl group, C2-C 60 alkenyl group, C2-C 60 alkynyl group, C1-C 60 Alkoxy group, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 aryloxy group, C6-C 60 Arylthio group, -Si(Q 21 )(Q 22 )(Q 23 ), -N(Q 21 )(Q 22 ), -B(Q 21 )(Q 22 ), -C(=O)(Q 21 ), -S(=O)2(Q 21 ), -P(=O)(Q 21 )(Q 22 ), or substituted or unsubstituted with any combination thereof, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 aryloxy group, or C6-C 60 Arylthiogi; or

[0116] -Si(Q 31 )(Q 32 )(Q 33 ), -N(Q 31 )(Q 32 ), -B(Q 31 )(Q 32 ), -C(=O)(Q 31 ), -S(=O)2(Q 31 ), or -P(=O)(Q 31 )(Q 32 ); and,

[0117] The above Q1 to Q3, Q 11 to Q 13 , Q 21 to Q 23 and Q 31 to Q 33 They are independently hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl group; cyano group; nitro group; C1-C 60 Alkyl group; C2-C 60 Alkenyl group; C2-C 60 alkynyl group; C1-C 60 Alkoxy group; or deuterium, -F, cyano group, C1-C 60 Alkyl group, C1-C 60 C3-C substituted or unsubstituted with an alkoxy group, a phenyl group, a biphenyl group, or any combination thereof 60 Carbocyclic group or C1-C 60 It is a heterocyclic group.

[0118] In the above Chemical Formula 1, the L of m1a 1a They may be the same or different from each other.

[0119] In the above chemical formula 1, the R1 of a1 may be the same or different from each other.

[0120] In the above chemical formula 1, the two R2s of a2 may be the same or different from each other.

[0121] According to one embodiment, the L in the above chemical formula 1 1a is a single bond, at least one R 10a C6-C substituted or unsubstituted 60 arylene group, or at least one R 10a C1-C substituted or unsubstituted 60 It can be a heteroarylen group.

[0122] According to another embodiment, the L in Formula 1 1a is a single bond, at least one R 10a A phenylene group substituted or unsubstituted with, at least one R 10aA biphenylene group substituted or unsubstituted with, or at least one R 10a It may be a carbazolylene group that is substituted or unsubstituted.

[0123] For example, the L in the above Chemical Formula 1 1a is a single combination; or

[0124] It may be a deuterium, -F, -Cl, -Br, -I, cyano group, phenyl group, biphenyl group, carbazoleyl group, dibenzofuran group, dibenzothiophen group, or any combination thereof, a phenylene group, or a carbazoylene group substituted or unsubstituted.

[0125] According to one embodiment, in the above formula 1-1, R3 comprises at least one R 10a C6-C substituted or unsubstituted 60 Aryl group, or at least one R 10a C1-C substituted or unsubstituted 60 It can be a heteroaryl group.

[0126] According to another embodiment, R3 in the above formula 1 may be a carbazole group, dibenzofuran group, dibenzothiophen group, or biphenyl group substituted with deuterium, -F, -Cl, -Br, -I, cyano group, phenyl group, biphenyl group, or any combination thereof, but is not limited thereto.

[0127] According to one embodiment, the first host may be a compound represented by the following chemical formula 1-1:

[0128] [Chemical Formula 1-1]

[0129]

[0130] Among the above chemical formula 1-1,

[0131] L 1a , m1a, and R1 to R3 each independently refer to the description of Chemical Formula 1 above, and

[0132] a14 and a24 are independently one of integers from 0 to 4.

[0133] In the above chemical formula 1-1, the 14 R1s may be identical or different from each other.

[0134] In the above chemical formula 1-1, the 24 R2s may be identical or different from each other.

[0135] According to one embodiment, the first host may be one of the following compounds HT-01 to HT-21, H39, H42, and H54.

[0136]

[0137]

[0138]

[0139]

[0140]

[0141]

[0142] .

[0143] According to another embodiment, the second host may be a compound represented by the following chemical formula 2:

[0144] <Chemical Formula 2>

[0145]

[0146] Among the above chemical formula 2,

[0147] X 31 is N or C(R 31 ) and; X 32 is N or C(R 32 ) and; X 33 is N or C(R 33 ) and; X 34 is N or C(R 34 ) and; X 35 is N or C(R 35 ) and; X 36 is N or C(R 36 ) but, X 31 To X 36 At least one of them is N and;

[0148] R 31 to R 36 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, at least one R 10a C1-C substituted or unsubstituted 60 alkyl group, at least one R 10a C2-C substituted or unsubstituted 60 alkenyl group, at least one R 10a C2-C substituted or unsubstituted 60 alkynyl group, at least one R 10a C1-C substituted or unsubstituted 60 Alkoxy group, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, at least one R 10a C1-C substituted or unsubstituted 60 Heterocyclic group, at least one R 10a C6-C substituted or unsubstituted 60 aryloxy group, at least one R 10a C6-C substituted or unsubstituted 60 arylthio group, -Si(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2) or -P(=S)(Q1)(Q2), and

[0149] The above R 31 to R 36 Two or more of them optionally combine with each other, so that at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group or at least one R 10a C1-C substituted or unsubstituted 60 It can form heterocyclic groups,

[0150] The above Q1 to Q3 and R 10aFor descriptions of each, refer to those described in this specification.

[0151] According to one embodiment, X in the above chemical formula 2 31 To X 36 At least two of them can be N. For example, X 31 To X 36 Two of them can be N. As another example, X 31 To X 36 Three of them can be N.

[0152] According to one embodiment, R in the above chemical formula 2 31 to R 36 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, at least one R 10a C1-C substituted or unsubstituted 20 alkyl group, at least one R 10a C2-C substituted or unsubstituted 20 alkenyl group, at least one R 10a C2-C substituted or unsubstituted 20 alkynyl group, at least one R 10a C1-C substituted or unsubstituted 20 Alkoxy group, at least one R 10a C3-C substituted or unsubstituted 30 Arylgi, at least one R 10a C1-C substituted or unsubstituted 30 Heteroaryl group, at least one R 10a C6-C substituted or unsubstituted 30 aryloxy group, at least one R 10a C6-C substituted or unsubstituted 30 It can be an arylthio group, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), or -S(=O)2(Q1).

[0153] According to one embodiment, the second host may be a compound represented by the following chemical formula 2-1.

[0154] [Chemical Formula 2-1]

[0155]

[0156] In the above chemical formula 2-1,

[0157] X 31 To X 35 For an explanation of, refer to the explanation of Chemical Formula 2, and

[0158] L 2a is a single bond, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and

[0159] m2a is an integer from 0 to 5, and

[0160] R 36a and R 36b R in the above chemical formula 2 is independently of each other. 36 Refer to the explanation for,

[0161] a34a and a34b are independently one of integers from 0 to 4.

[0162] In the above chemical formula 2-1, the L of m2a 2a They may be the same or different from each other.

[0163] In the above chemical formula 2-1, the R of a34a 36a Each can be the same or different from one another.

[0164] In the above chemical formula 2-1, the R of a34b 36b Each can be the same or different from one another.

[0165] According to one embodiment, the above L 2a is a single bond, at least one R 10a C6-C substituted or unsubstituted 60 arylene group, or at least one R 10aC1-C substituted or unsubstituted 60 It can be a heteroarylen group.

[0166] According to one embodiment, the second host may be one of the following compounds ET-01 to ET-13, H36 to H38, H40, H41, H43 to H46, H52, H53, and H121:

[0167]

[0168]

[0169]

[0170]

[0171]

[0172]

[0173] Description of the first dopant and the second dopant

[0174] The above first dopant may be a phosphorescent dopant.

[0175] According to one embodiment, the first dopant may be a transition metal-containing organometallic compound. For example, the transition metal may be a first-period transition metal, a second-period transition metal, or a third-period transition metal. As another example, the transition metal may be a metal having an atomic weight of 40 or more. As yet another example, the transition metal may be iridium (Ir), platinum (Pt), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb), thulium (Tm), or rhodium (Rh).

[0176] According to one embodiment, the first dopant comprises iridium or platinum; and at least one organic ligand, wherein the organic ligand is a bidentate organic ligand, a triidentate organic ligand, or a tetradentate organic ligand, and may be an organometallic compound.

[0177] According to one embodiment, the first dopant may be an organometallic compound including iridium and a bidentate ligand, an organometallic compound including platinum and a tetradentate ligand, or any combination thereof.

[0178] According to another embodiment, the first dopant may include an organometallic compound represented by the following chemical formula 40, an organometallic compound represented by the following chemical formula 50, or any combination thereof:

[0179] <Chemical Formula 40>

[0180]

[0181] <Chemical Formula 50>

[0182]

[0183] Among the above chemical formulas 40 and 50,

[0184] M4 and M5 are independently platinum (Pt), palladium (Pd), copper (Cu), silver (Ag), gold (Au), rhodium (Rh), iridium (Ir), ruthenium (Ru), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb) or thulium (Tm), and

[0185] n51 is 1, 2, or 3, and

[0186] Ln52 is an organic ligand, and

[0187] n52 is 0, 1, or 2, and

[0188] Y 41 to Y 44 , Y 51 and Y 52 are independently N or C, and

[0189] Ring A 41 inner ring A 44 , ring A 51 and ring A 52 are independently of each other, C3-C 60Carbocyclic group or C1-C 60 It is a heterocyclic group, and

[0190] T 41 To T 44 and T 51 and T 52 are independently chemical bonds (e.g., covalent bonds or coordinate bonds), *-O-*' or *-S-*', and

[0191] L 41 to L 44 and L 51 are independently of each other, single bond, *-O-*', *-S-*', *-C(R 45 )(R 46 )-*', *-C(R 45 )=*', *=C(R 45 )-*', *-C(R 45 )=C(R 45 )-*', *-C(=O)-*', *-C(=S)-*', *-C≡C-*', *-B(R 45 )-*', *-N(R 45 )-*', *-P(R 45 )-*', *-Si(R 45 )(R 46 )-*', *-P(R 45 )(R 46 )-*' or *-Ge(R 45 )(R 46 )-*' and,

[0192] m41 to m44 are independently 0, 1, or 2, and if m41 is 0, L 41 If it does not exist and m42 is 0, then L 42 is not present, and if m43 is 0, L 43 If it does not exist and m44 is 0, then L 44 ...does not exist, and at least 2 of m41 to m44 are not 0, and

[0193] m51 is 1 or 2, and

[0194] R 41 to R 46 , R51 and R 52 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, at least one R 10a C1-C substituted or unsubstituted 60 alkyl group, at least one R 10a C1-C substituted or unsubstituted 60 alkenyl group, at least one R 10a C1-C substituted or unsubstituted 60 alkynyl group, at least one R 10a C1-C substituted or unsubstituted 60 Alkoxy group, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, at least one R 10a C1-C substituted or unsubstituted 60 Heterocyclic group, at least one R 10a C6-C substituted or unsubstituted 60 aryloxy group, at least one R 10a C6-C substituted or unsubstituted 60 Arylthio group, -Si(Q 41 )(Q 42 )(Q 43 ), -N(Q 41 )(Q 42 ), -B(Q 41 )(Q 42 ), -C(=O)(Q 41 ), -S(=O)2(Q 41 ) or -P(=O)(Q 41 )(Q 42 ) and,

[0195] R 45 and R 41 ; R 45 and R 42 ; R 45 and R 43 ; or R 45 and R 44 ; optionally combines with each other to form at least one R 10aSubstituted or unsubstituted C3-C 60 Carbocyclic group or at least one R 10a Substituted or unsubstituted C1-C 60 It can form heterocyclic groups,

[0196] b41 to b44, b51 and b52 are independently integers from 1 to 8, and

[0197] Each of the above * and *' is a bonding site with an adjacent atom, and

[0198] The above R 10a Refer to the description of as set forth in this specification, and

[0199] Above Q 41 to Q 43 Descriptions for each are in Q of this specification. 11 Refer to the explanation for.

[0200] Among the above chemical formulas 40 and 50, M4 and M5 may independently be Pt, Pd, Cu, Ag, Au, Ir, or Os.

[0201] For example, among the above chemical formulas 40 and 50, M4 and M5 may be Pt or Ir independently of each other.

[0202] As another example, M4 could be Pt and M5 could be Ir.

[0203] According to one embodiment, among the above chemical formula 40,

[0204] Y 41 to Y 44 are each C or;

[0205] Y 41 , Y 42 and Y 43 are C and Y respectively. 44 is N or;

[0206] Y 41 , Y 42 and Y 44 are C and Y respectively.43 is N or;

[0207] Y 41 , Y 43 and Y 44 are C and Y respectively. 42 is N or;

[0208] Y 42 , Y 43 and Y 44 are C and Y respectively. 41 is N or;

[0209] Y 41 and Y 44 are C and Y respectively. 42 and Y 43 are each N or;

[0210] Y 41 and Y 44 are respectively N, and Y 42 and Y 43 are each C or;

[0211] Y 41 and Y 42 are C and Y respectively. 43 and Y 44 are each N or;

[0212] Y 41 and Y 42 are N and Y 43 and Y 44 are each C or;

[0213] Y 41 and Y 43 are C and Y respectively. 42 and Y 44 are each N or; or

[0214] Y 41 and Y 43 are respectively N, and Y 42 and Y 44 Each can be C.

[0215] According to one embodiment, among the above chemical formula 50,

[0216] Y 51 and Y 52 are each C or,

[0217] Y 51 is N and Y 52 is C or,

[0218] Y 51 is C and Y 52 is N or,

[0219] Y 51 and Y 52 Each can be N.

[0220] Among the above chemical formulas 40 and 50, ring A 41 inner ring A 44 , ring A 51 and ring A 52are independently, benzene group, naphthalene group, anthracene group, phenanthrene group, triphenylene group, pyrene group, chrysene group, cyclopentadiene group, 1,2,3,4-tetrahydronaphthalene group, furan group, thiophene group, silol group, indene group, fluorene group, indole group, carbazole group, benzofuran group, dibenzofuran group, benzothiophen group, dibenzothiophen group, benzocilol group, dibenzocilol group, indenopyridine group, indolopyridine group, benzofuropyridine group, benzothienopyridine group, benzocilololopyridine group, indenopyrimidine group, indolopyrimidine group, benzofuropyrimidine group, benzothienopyrimidine group, Benzocillolopyrimidine group, dihydropyridine group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, quinoxaline group, quinazoline group, phenanthroline group, pyrrole group, pyrazole group, imidazole group, 2,3-dihydroimidazole group, triazole group, 2,3-dihydrotriazole group, oxazole group, isooxazole group, thiazole group, isothiaazole group, oxadiazole group, thiadiazole group, benzopyrazole group, benzimidazole group, 2,3-dihydrobenzimidazole group, imidazopyridine group, 2,3-dihydroimidazopyridine group, imidazopyrimidine group, 2,3-dihydroimidazopyrimidine group, imidazopyrazine group, 2,3-dihydroimidazopyrazine group, benzoxazole group, benzothiazole group, benzoxadiazole group, benzothiadiazole group, 5,6,7,8-tetrahydroisoquinoline(5,6,7,It may be an 8-tetrahydroisoquinoline group or a 5,6,7,8-tetrahydroquinoline group.

[0221] According to one embodiment, among the above chemical formula 40,

[0222] T 41 To T 44 are all chemical bonds or;

[0223] T 41 is *-O-*' or *-S-*', and T 42 To T 44 is a chemical bond or;

[0224] T 42 is *-O-*' or *-S-*', and T 41 , T 43 and T 44 is a chemical bond or;

[0225] T 43 is *-O-*' or *-S-*', and T 41 , T 42 and T 44 is a chemical bond; or

[0226] T 44 is *-O-*' or *-S-*', and T 41 , T 42 and T 43 It can be a chemical bond.

[0227] According to another embodiment, in the above chemical formula 40, T 41 To T 44 All of them can be chemical bonds.

[0228] According to another embodiment, T in the above chemical formula 50 51 and T 52 All of them can be chemical bonds.

[0229] According to another embodiment, Y 41 and T 41 The connection between or Y 41The bond between and M4 can be a covalent bond or a coordinate bond.

[0230] According to another embodiment, Y 42 Wow T 42 The connection between or Y 42 The bond between and M4 can be a covalent bond or a coordinate bond.

[0231] According to another implementation example, Y 43 and T 43 The connection between or Y 43 The bond between and M4 is a covalent bond or a coordinate bond.

[0232] According to another embodiment, Y 44 Wow T 44 The connection between or Y 44 The bond between and M4 can be a covalent bond or a coordinate bond.

[0233] According to another embodiment, Y 51 and T 51 The connection between or Y 51 The bond between and M5 can be a covalent bond or a coordinate bond.

[0234] According to another embodiment, Y 52 Wow T 52 The connection between or Y 52 The bond between and M5 can be a covalent bond or a coordinate bond.

[0235] According to another embodiment, L 41 to L 44 and L 51 are independently of each other, single bond, *-O-*', *-S-*', *-C(R 45 )(R 46 )-*', *-C(R 45 )=*', *=C(R 45 )-*', *-C(R 45 )=C(R 45 )-*', *-C(=O)-*', *-N(R 45 )-*', or *-Si(R 45 )(R 46)-*'can be.

[0236] According to another embodiment, m41 may be 0, m42 to m44 may each be 1, and m51 may be 1.

[0237] According to another embodiment, among the above chemical formulas 40 and 50, R 41 to R 46 , R 51 and R 52 are independently of each other,

[0238] Hydrogen, Deuterium, -F, -Cl, -Br, -I, Cyano group, C1-C 20 alkyl group or C1-C 20 Alkoxygenation;

[0239] C1-C substituted with deuterium, -F, -Cl, -Br, -I, cyano group, phenyl group, biphenyl group, or any combination thereof 20 alkyl group or C1-C 20 Alkoxygenation;

[0240] Deuterium, -F, -Cl, -Br, -I, cyano group, C1-C 20 Alkyl group, C1-C 20Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-bifluorenyl group, benzoflurenyl group, dibenzoflurenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, perylenyl group, pentacenyl group, pyrroleyl group, thiophenyl group, furanyl group, silolyl group, imidazoleyl group, pyrazolyl group, thiazoleyl group, isothiazyl group, oxazolyl group, isoxazolyl group, pyridinyl group, pyrazinyl group, Pyrimidinyl group, pyridazinyl group, indole group, isoindole group, indazole group, furinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, benzisoquinolinyl group, phthalazinyl group, naphthiridinyl group, quinoxalinyl group, benzoquinoxalinyl group, quinazolinyl group, benzoquinazolinyl group, cinolinyl group, phenanthridinyl group, acrridinyl group, phenanthrolinyl group, phenazinyl group, benzimidazole group, benzofuranyl group, benzothiophenyl group, benzocilol group, benzothiazole group, benzisothiazole group, benzoxazole group, benzisooxazole group, triazole group, tetrazole group, thiadiazole group, oxadiazole group, Triazinyl group, carbazoleyl group, dibenzofuranyl group, dibenzothiophenyl group, dibenzosilolyl group, benzocarbazoleyl group, naphthobenzofuranyl group, naphthobenzothiophenyl group, naphthobenzosilolyl group, dibenzocarbazoleyl group, dinaphthofuranyl group, dinaphthiophenyl group, dinaphthosilolyl group, imidazopyridinyl group, imidazopyrimidinyl group, oxazolopyridinyl group, thiazolopyridinyl group, benzonaphthiridinyl group, azafluorenyl group, azaspiro-bifluorenyl group, azacarbazoleyl group, azadibenzofuranyl group, azadibenzothiophenyl group, azadibenzosilolyl group, indenopyrrolyl group, indolopyrrolyl group, indenocarbazoleyl group, Indolocarbazole diary, -Si(Q 31 )(Q 32 )(Q 33 ), -N(Q 31 )(Q 32 ), -B(Q 31 )(Q 32), -C(=O)(Q 31 ), -S(=O)2(Q 31 ), -P(=O)(Q 31 )(Q 32 ), or substituted or unsubstituted by any combination thereof, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-bifluorenyl group, benzoflurenyl group, dibenzoflurenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, perylenyl group, pentacenyl group, pyrroleyl group, thiophenyl group, furanyl group, silolyl group, imidazoleyl group, pyrazolyl group, thiazoleyl group, isothiazolyl group, oxazoleyl group, isoxazoleyl group, Pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, indole group, isoindole group, indazole group, furinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, benzoisoquinolinyl group, phthalazinyl group, naphthalidinyl group, quinoxalinyl group, benzoquinoxalinyl group, quinazolinyl group, benzoquinazolinyl group, cinolinyl group, phenanthridinyl group, acrridinyl group, phenanthrolinyl group, phenazinyl group, benzimidazole group, benzofuranyl group, benzothiophenyl group, benzocilol group, benzothiazole group, benzisothiazole group, benzoxazole group, benzisooxazole group, triazole group, tetrazole group, Thiadiazoleyl group, oxadiazoleyl group, triazinyl group, carbazoleyl group, dibenzofuranyl group, dibenzothiophenyl group, dibenzosilolyl group, benzocarbazoleyl group, naphthobenzofuranyl group, naphthobenzothiophenyl group, naphthobenzosilolyl group, dibenzocarbazoleyl group, dinaphthofuranyl group, dinaphthiophenyl group, dinaphthosilolyl group, imidazopyridinyl group, imidazopyrimidinyl group, oxazolopyridinyl group, thiazolopyridinyl group, benzonaphthiridinyl group, azafluorenyl group, azaspiro-bifluorenyl group, azacarbazoleyl group, azadibenzofuranyl group, azadibenzothiophenyl group, azadibenzosilolyl group, indenopyroleyl group, Indolopyrrole diary, indenocarbazole diary or indolocarbazole diary; or

[0241] -Si(Q 41 )(Q 42 )(Q 43 ), -N(Q 41 )(Q 42 ), -B(Q 41 )(Q 42 ), -C(=O)(Q 41 ), -S(=O)2(Q 41 ) or -P(=O)(Q 41 )(Q 42 );

[0242] It could be.

[0243] According to another embodiment, among the above chemical formulas 40 and 50, R 41 to R 46 , R 51 and R 52 are independently of each other,

[0244] Hydrogen, Deuterium, -F, -Cl, -Br, -I, Cyano group, C1-C 20 alkyl group or C1-C 20 Alkoxygenation;

[0245] C1-C substituted with deuterium, -F, -Cl, -Br, -I, cyano group, phenyl group, biphenyl group, or any combination thereof 20 alkyl group or C1-C 20 Alkoxy group; or

[0246] Deuterium, -F, -Cl, -Br, -I, cyano group, C1-C 20 Alkyl group, C1-C 20 A phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-bifluorenyl group, carbazoleyl group, dibenzofuranyl group, dibenzothiophenyl group or dibenzosilol group substituted or unsubstituted with an alkoxy group, a phenyl group, a biphenyl group, or any combination thereof;

[0247] It could be.

[0248] For example, the first dopant is an organometallic compound represented by the chemical formula 40, and Y in the chemical formula 40 41is C, and T 41 It is a coordinate bond, m41 is 0, and m42 to m44 can be 1.

[0249] As another example, the first dopant is an organometallic compound represented by the chemical formula 40, and Y in the chemical formula 40 41 is C, and T 41 ... is a coordinate bond, m41 is 0, m42 to m44 are 1, and L 42 and L 44 Each is a single bond, and L 43 은 *-O-*', *-S-*', *-C(R 45 )(R 46 )-*', or *-N(R 45 )-*'can be.

[0250] As another example, the first dopant is an organometallic compound represented by the chemical formula 50, and Y in the chemical formula 50 51 is C, and T 51 is a coordinate bond; or Y 51 is N, and T 51 It can be a coordinate bond.

[0251] As another example, the first dopant may be an organometallic compound represented by the following chemical formula 41:

[0252] <Chemical Formula 41>

[0253]

[0254] M4, Y in the above chemical formula 41 41 to Y 44 , ring A 41 inner ring A 44 , L 42 to L 44 , R 41 to R 44 and the descriptions for each of b41 to b44 refer to those set forth in this specification.

[0255] According to one embodiment, among the above chemical formula 41 The group represented by may be a group represented by one of the following chemical formulas A41-1 to A41-12:

[0256]

[0257]

[0258] Among the above chemical formulas A41-1 to A41-12,

[0259] * is the binding site with M4 in the above chemical formula 41, and

[0260] *' is L in the above chemical formula 41 44 It is a combination site with.

[0261] For example, among the above chemical formula 41 The group indicated by may be the group indicated by the above chemical formula A41-1, A41-2, or A41-9.

[0262] According to another embodiment, among the above chemical formula 41 The group represented by may be a group represented by one of the following chemical formulas A42-1 to A42-17:

[0263]

[0264]

[0265] Among the above chemical formulas A42-1 to A42-17,

[0266] Y 42 Refer to the description of as set forth in this specification, and

[0267] * is the binding site with M4 in the above chemical formula 41, and

[0268] *' is L in the above chemical formula 41 42 It is a combination site with.

[0269] For example, among the above chemical formula 41 The group indicated by may be the group indicated by the above chemical formulas A42-1, A42-6, A42-7, or A42-14.

[0270] According to another embodiment, among the above chemical formula 41 The group represented by may be a group represented by one of the following chemical formulas A43-1 to A43-6:

[0271]

[0272]

[0273] Among the above chemical formulas A43-1 to A43-6,

[0274] Y 43 Refer to the description of as set forth in this specification, and

[0275] * is the binding site with M4 in the above chemical formula 41, and

[0276] *' is L in the above chemical formula 41 42 It is a combination site with,

[0277] *" is L in the above chemical formula 41 43 It is a combination site with.

[0278] For example, among the above chemical formula 41 The group indicated by may be the group indicated by the above chemical formula A43-1, A43-5, or A43-6.

[0279] According to another embodiment, among the above chemical formula 41 The group represented by may be a group represented by one of the following chemical formulas A44-1 to A44-4:

[0280]

[0281] Among the above chemical formulas A44-1 to A44-4,

[0282] Y 44 Refer to the description of as set forth in this specification, and

[0283] * is the binding site with M4 in the above chemical formula 41, and

[0284] *' is L in the above chemical formula 41 44 It is a combination site with,

[0285] *" is L in the above chemical formula 41 43 It is a combination site with.

[0286] For example, among the above chemical formula 41 The group indicated by may be the group represented by the above chemical formula A44-1.

[0287] As another example, the first dopant may be an organometallic compound represented by the following chemical formula 51:

[0288] <Chemical Formula 51>

[0289]

[0290] In the above chemical formula 51, M5, Y 51 , Y 52 , ring A 51 , ring A 52 , L 51 , m51, R 51 , R 52 , b51, b52, Ln 52 Refer to the descriptions for each of , n51, and n52 as set forth in this specification.

[0291] According to one embodiment, among the above chemical formula 51 The group represented by may be a group represented by one of the following chemical formulas A51-1 to A51-14:

[0292]

[0293]

[0294] Among the above chemical formulas A51-1 to A51-14,

[0295] * is the binding site with M5 in the above chemical formula 51, and

[0296] *' is L in the above chemical formula 51 51 It is a combination site with.

[0297] For example, among the above chemical formula 51 The group represented by may be a group represented by one of the above chemical formulas A51-1, A51-4, A51-5, A51-6, A51-8, A51-9, and A51-10:

[0298] According to one embodiment, among the above chemical formula 51 The group represented by may be a group represented by one of the following chemical formulas A52-1 to A52-14:

[0299]

[0300]

[0301] Among the above chemical formulas A52-1 to A52-14,

[0302] * is the binding site with M5 in the above chemical formula 51, and

[0303] *' is L in the above chemical formula 51 51 It is a combination site with.

[0304] For example, among the above chemical formula 51 The group indicated by may be a group indicated by one of the above chemical formulas A52-1, A52-4, A52-9, A52-11, and A52-13.

[0305] According to one embodiment, Ln in the above chemical formula 51 52 may be a group represented by one of the following chemical formulas Ln52-1 to Ln52-6:

[0306]

[0307] Among the above chemical formulas Ln52-1 to Ln52-6,

[0308] R n52a to R n52d R in the above Chemical Formula 51, respectively 52 Refer to the explanation for.

[0309] * is the binding site with M5 in the above chemical formula 51.

[0310] The above first dopant may be, for example, any one of the following compounds D1-1 to D1-3, AD-01 to AD-46, and PD1 to PD39:

[0311]

[0312]

[0313]

[0314]

[0315]

[0316]

[0317]

[0318]

[0319]

[0320]

[0321]

[0322]

[0323]

[0324]

[0325] Meanwhile, the above-mentioned second dopant may be a delayed fluorescence dopant.

[0326] According to one embodiment, the difference between the triplet energy level of the delay fluorescent dopant and the singlet energy level of the delay fluorescent dopant may be 0 eV or more and 0.5 eV or less. By satisfying the range described above for the difference between the triplet energy level of the delay fluorescent material and the singlet energy level of the delay fluorescent material, the up-conversion from the triplet state to the singlet state of the delay fluorescent material is effectively achieved, thereby improving the luminous efficiency of the light-emitting device.

[0327] According to one embodiment, the second dopant may not contain a transition metal.

[0328] For example, the second dopant comprises: i) at least one electron donor (e.g., a π-electron-excess C3-C such as a carbazole group). 60 cyclic group (π electron-rich C3-C 60 cyclic group) etc.) and at least one electron acceptor (e.g., sulfoxide group, cyano group, π electron-deficient nitrogenous C1-C 60 cyclic group (π electron-deficient nitrogen-containing C1-C 60 ii) a substance containing a cyclic group, etc., and ii) a C8-C containing two or more cyclic groups condensed while sharing boron (B). 60 It may include materials including polycyclic groups.

[0329] According to one embodiment, the second dopant may include a heterocyclic compound represented by the following chemical formula 11:

[0330] <Chemical Formula 11>

[0331] (Ar1) n1 -(L1) m1 -(Ar2) n2

[0332] Among the above chemical formula 11,

[0333] L1 is at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and

[0334] n1 and n2 are independently 0, 1, 2, or 3, and

[0335] The sum of n1 and n2 is 1 or greater, and

[0336] m1 is an integer from 0 to 5, and

[0337] Ar1 and Ar2 are independently the group represented by the following chemical formula 11A-1, the group represented by the following chemical formula 11A-2, or the group represented by the following chemical formula 11B, and

[0338] <Chemical Formula 11A-1>

[0339]

[0340] <Chemical Formula 11A-2>

[0341]

[0342] <Chemical Formula 11B>

[0343]

[0344] Among the above chemical formulas 11A-1, 11A-2, and 11B,

[0345] Y1 and Y2 are independently a single bond, *-O-*', *-S-*', *-C(Z1)(Z2)-*', *-N(Z1)-*', *-Si(Z1)(Z2)-*', *-C(=O)-*', *-S(=O)2-*', *-B(Z1)-*', *-P(Z1)-*' or -P(=O)(Z1)(Z2)-*', provided that at least one of Y1 and Y2 of Chemical Formula 11A-1 is not a single bond,

[0346] Rings CY1 and CY2 are independent of each other, C3-C 60 Carbocyclic group or C1-C 60 It is a heterocyclic group, and

[0347] X1 to X3 are independently C or N, provided that if X1 to X3 are all C, R 30 At least one of them is cyanobacteria, and

[0348] Z1, Z2, R 10 , R 20 and R 30 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, at least one R10a C1-C substituted or unsubstituted 60 alkyl group, at least one R 10a C1-C substituted or unsubstituted 60 alkenyl group, at least one R 10a C1-C substituted or unsubstituted 60 alkynyl group, at least one R 10a C1-C substituted or unsubstituted 60 Alkoxy group, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, at least one R 10a C1-C substituted or unsubstituted 60 Heterocyclic group, at least one R 10a C6-C substituted or unsubstituted 60 aryloxy group, at least one R 10a C6-C substituted or unsubstituted 60 arylthio group, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2), and

[0349] a10 and a20 are independently integers from 1 to 10, and

[0350] a30 is an integer from 1 to 6, and

[0351] Z1, Z2, R 10 , R 20 and R 30 Two or more of them optionally combine with each other, so that at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group or at least one R 10a C1-C substituted or unsubstituted 60 It can form heterocyclic groups,

[0352] R of 2 or more 30 They optionally combine with each other, at least one R 10aC3-C substituted or unsubstituted 60 Carbocyclic group or at least one R 10a C1-C substituted or unsubstituted 60 It can form heterocyclic groups,

[0353] R of the above chemical formula 11A-1 10 and R 20 At least one of them is a binding site with L1 or Ar1 of Chemical Formula 11, and

[0354] The * in the above chemical formula 11A-2 is a binding site with L1 or Ar1 of chemical formula 11, and

[0355] In the above chemical formula 11B, R 30 At least one of them is a binding site with L1 or Ar1, and

[0356] The above R 10a , and the descriptions for each of Q1 to Q3 refer to those described in this specification.

[0357] The above heterocyclic compound can effectively block intramolecular orbital overlap by separating the electron-donor moiety and the electron-acceptor moiety, thereby preventing the molecule's singlet and triplet from overlapping, resulting in a very low △E st It can have. Therefore, it is a compound capable of exhibiting Thermally Activated Delayed Fluorescence (TADF) by enabling reverse intersystem transition from the triplet excited state to the singlet excited state through thermal activation even at room temperature, and thus, since the exciton in the triplet state is utilized for luminescence, the luminescence efficiency is improved.

[0358] According to another embodiment, the second dopant comprises a condensed ring in which at least one first ring and at least one second ring are condensed together, wherein the first ring is a six-membered ring containing B (boron) as a ring-forming atom (e.g., a six-membered ring containing B (boron) and nitrogen (N) as ring-forming atom), and the second ring may be a pyrrole group, a furan group, a thiophene group, a benzene group, a pyridine group, a pyrimidine group, or a piperidine group. For example, the second dopant may further comprise a tert-butyl group, a biphenyl group, a terphenyl group, a carbazole group, or any combination thereof.

[0359] According to another embodiment, the second dopant may be a heterocyclic compound represented by one of the following chemical formulas 11(4) to 11(7):

[0360]

[0361] Among the above chemical formulas 11(4) to 11(7),

[0362] Gori CY 11 Inner ring CY 15 They are independent of each other, C3-C 60 Carbocyclic group or C1-C 60 It is a heterocyclic group, and

[0363] Y 11 to Y 16 are independently of each other, single bond, *-O-*', *-S-*', *-C(R 16 )(R 17 )-*', *-N(R 16 )-*', *-Si(R 16 )(R 17 )-*', *-C(=O)-*', *-S(=O)2-*', *-B(R 16 )-*', *-P(R 17 )-*' or *-P(=O)(R 16 )-*', and * and *' are bonding sites with neighboring atoms, respectively, and

[0364] Y 11a , Y12a and Y 13a are independently N, B, or P, and

[0365] R 11 to R 17 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, at least one R 10a C1-C substituted or unsubstituted 60 alkyl group, at least one R 10a C1-C substituted or unsubstituted 60 alkenyl group, at least one R 10a C1-C substituted or unsubstituted 60 alkynyl group, at least one R 10a C1-C substituted or unsubstituted 60 Alkoxy group, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, at least one R 10a C1-C substituted or unsubstituted 60 Heterocyclic group, at least one R 10a C6-C substituted or unsubstituted 60 aryloxy group, at least one R 10a C6-C substituted or unsubstituted 60 arylthio group, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2), and

[0366] R 11 to R 17 Of these, 2 or more are optionally combined with each other to form at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group or at least one R 10a C1-C substituted or unsubstituted 60 Forming heterocyclic groups,

[0367] a11 to a15 are independently integers from 1 to 6, and

[0368] The above R 10a , and the descriptions for each of Q1 to Q3 refer to those described in this specification.

[0369] For example, the second dopant may be a heterocyclic compound represented by the chemical formula 11 (4).

[0370] According to another embodiment, among the chemical formulas 11(4) to 11(7), the ring CY 11 Inner ring CY 15 It may be a benzene group, a naphthalene group, a carbazole group, a dibenzofuran group, a dibenzothiophene group, or a dibenzosilol group independently of each other.

[0371] According to another embodiment, R in the above chemical formulas 11(4) to 11(7) 11 to R 17 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, methyl group, ethyl group, n-propyl group, iso-propyl group, n-butyl group, sec-butyl group, iso-butyl group, tert-butyl group, ethenyl group, propphenyl group, butenyl group, methoxy group, ethoxy group, n-propoxy group, iso-propoxy group, n-butoxy group, sec-butoxy group, iso-butoxy group, or tert-butoxy group;

[0372] Deuterium, -F, -Cl, -Br, -I, cyano group, phenyl group, biphenyl group, or any combination thereof substituted with a methyl group, ethyl group, n-propyl group, iso-propyl group, n-butyl group, sec-butyl group, iso-butyl group, tert-butyl group, methoxy group, ethoxy group, n-propoxy group, iso-propoxy group, n-butoxy group, sec-butoxy group, iso-butoxy group, or tert-butoxy group;

[0373] Deuterium, -F, -Cl, -Br, -I, Cyano group, Methyl group, Ethyl group, n-propyl group, iso-propyl group, n-butyl group, sec-butyl group, iso-butyl group, tert-butyl group, Methoxy group, Ethoxy group, n-propoxy group, iso-propoxy group, n-butoxy group, sec-butoxy group, iso-butoxy group, tert-butoxy group, Cyclopentyl group, Cyclohexyl group, Cycloheptyl group, Cyclopentenyl group, Cyclohexenyl group, Phenyl group, Biphenyl group, Terphenyl group, Pentalenyl group, Indenyl group, Naphthyl group, Azulenyl group, Indacenyl group, Acenaphthyl group, Fluorenyl group, Spiro-bifluorenyl group, Benzofluorenyl group, Dibenzofluorenyl group, Phenalenyl group, Phenanthrenyl group, Anthracenyl group, Fluoranthenyl group, Triphenylenyl group, Pyrenyl group, Chrysenyl group, Perylenyl group, Pentacenyl group, Pyrroleyl group, Thiophenyl group, Furanyl group, Silolyl group, Imidazoleyl group, Pyrazolyl group, Thiazolyl group, Isothiazolyl group, Oxazoleyl group, Isoxazoleyl group, Pyridinyl group, Pyrazinyl group, Pyrimidinyl group, Pyridazinyl group, Indoleyl group, Isoindoleyl group, Indazoleyl group, Furinyl group, Quinolinyl group, Isoquinolinyl group, Benzoquinolinyl group, Benzoisoquinolinyl group, Phthalasinyl group, Naphthiridinyl group, Quinoxalinyl group, Benzoquinoxalinyl group, Quinazolinyl group, Benzoquinazolinyl group, Sinolinyl group, Phenanthridinyl group, acridinyl group, phenanthrolinyl group, phenazinyl group, benzimidazoleyl group, benzofuranyl group, benzothiophenyl group, benzocylolyl group, benzothiazoleyl group, benzisothiazoleyl group, benzoxazoleyl group, benzisooxazoleyl group, triazoleyl group, tetrazoleyl group, thiadiazoleyl group, oxadiazoleyl group, triazinyl group, carbazoleyl group, dibenzofuranyl group, dibenzothiophenyl group, dibenzocylolyl group, benzocarbazoleyl group, naphthobenzofuranyl group, naphthobenzothiophenyl group, naphthobenzocylolyl group, dibenzocarbazoleyl group, dinaphthofuranyl group, dinaphthothiophenyl group, dinaphthosilolyl group, imidazopyridinyl group, imidazopyrimidinyl group, Oxazolopyridinyl group, thiazolopyridinyl group, benzonaphthalidinyl group, azafluorenyl group, azaspiro-bifluorenyl group, azacarbazoleyl group, azadibenzofuranyl group, azadibenzothiophenyl group, azadibenzosilolyl group,Indenopyrrol Diary, Indolopyrrol Diary, Indenocarbazole Diary, Indolocabazole Diary, -Si(Q, 31 )(Q 32 )(Q 33 ), -N(Q 31 )(Q 32 ), -B(Q 31 )(Q 32 ), -C(=O)(Q 31 ), -S(=O)(Q 31 ), -S(=O)2(Q 31 ), -P(=O)(Q 31 )(Q 32 ), -P(=S)(Q 31 )(Q 32), or substituted or unsubstituted by any combination thereof, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro-bifluorenyl group, benzoflurenyl group, dibenzoflurenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, perylenyl group, pentacenyl group, pyrroleyl group, thiophenyl group, furanyl group, silolyl group, imidazoleyl group, pyrazolyl group, thiazoleyl group, isothiazolyl group, oxazoleyl group, isoxazoleyl group, Pyridinyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, indole group, isoindole group, indazole group, furinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, benzoisoquinolinyl group, phthalazinyl group, naphthalidinyl group, quinoxalinyl group, benzoquinoxalinyl group, quinazolinyl group, benzoquinazolinyl group, cinolinyl group, phenanthridinyl group, acrridinyl group, phenanthrolinyl group, phenazinyl group, benzimidazole group, benzofuranyl group, benzothiophenyl group, benzocilol group, benzothiazole group, benzisothiazole group, benzoxazole group, benzisooxazole group, triazole group, tetrazole group, Thiadiazoleyl group, oxadiazoleyl group, triazinyl group, carbazoleyl group, dibenzofuranyl group, dibenzothiophenyl group, dibenzosilolyl group, benzocarbazoleyl group, naphthobenzofuranyl group, naphthobenzothiophenyl group, naphthobenzosilolyl group, dibenzocarbazoleyl group, dinaphthofuranyl group, dinaphthiophenyl group, dinaphthosilolyl group, imidazopyridinyl group, imidazopyrimidinyl group, oxazolopyridinyl group, thiazolopyridinyl group, benzonaphthiridinyl group, azafluorenyl group, azaspiro-bifluorenyl group, azacarbazoleyl group, azadibenzofuranyl group, azadibenzothiophenyl group, azadibenzosilolyl group, indenopyroleyl group, Indolopyrrole diary, indenocarbazole diary, or indolocarbazole diary; or

[0374] -N(Q 11 )(Q 12 ); can be.

[0375] According to another embodiment, the R of a11 of the above chemical formulas 11(4) to 11(7) 11 , a12 R 12 , a13 R 13 , a14 R 14 , a15 R 15 , R 16 , and R 17 At least one of which is a tert-butyl group, a biphenyl group, or a terphenyl group; or

[0376] It may be a methyl group, ethyl group, n-propyl group, iso-propyl group, n-butyl group, sec-butyl group, iso-butyl group, tert-butyl group, methoxy group, ethoxy group, n-propoxy group, iso-propoxy group, n-butoxy group, sec-butoxy group, iso-butoxy group, tert-butyl group, phenyl group, biphenyl group, terphenyl group, fluorenyl group, carbazoleyl group, dibenzofuranyl group, dibenzothiophenyl group, or dibenzosilolyl group, substituted or unsubstituted with a tert-butyl group, biphenyl group, terphenyl group, or any combination thereof.

[0377] According to one embodiment, the second dopant may be any one of the following D2-1 to D2-3 and DF1 to DF9:

[0378]

[0379]

[0380]

[0381]

[0382]

[0383]

[0384] [Explanation of Fig. 1]

[0385] FIG. 1 schematically illustrates a cross-sectional view of a light-emitting element (10) according to one embodiment of the present invention. The light-emitting element (10) includes a first electrode (110), an intermediate layer (130), and a second electrode (150).

[0386] Hereinafter, the structure and manufacturing method of a light-emitting element (10) according to one embodiment of the present invention are described as follows with reference to FIG. 1.

[0387] [First electrode (110)]

[0388] A substrate may be additionally disposed on the lower part of the first electrode (110) of FIG. 1 or on the upper part of the second electrode (150). As the substrate, a glass substrate or a plastic substrate may be used. Alternatively, the substrate may be a flexible substrate and may include a plastic with excellent heat resistance and durability, such as polyimide, polyethylene terephthalate (PET), polycarbonate, polyethylene naphtalate, polyarylate (PAR), polyetherimide, or any combination thereof.

[0389] The first electrode (110) can be formed, for example, by providing a material for the first electrode on the substrate using a deposition method or a sputtering method. When the first electrode (110) is an anode, a material with a high work function that facilitates hole injection can be used as the material for the first electrode.

[0390] The first electrode (110) may be a reflective electrode, a semi-transparent electrode, or a transparent electrode. To form the first electrode (110) which is a transparent electrode, indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), zinc oxide (ZnO), or any combination thereof may be used as the material for the first electrode. Alternatively, to form the first electrode (110) which is a semi-transparent electrode or a reflective electrode, magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), or any combination thereof may be used as the material for the first electrode.

[0391] The first electrode (110) may have a single-layer structure consisting of a single layer or a multi-layer structure including multiple layers. For example, the first electrode (110) may have a three-layer structure of ITO / Ag / ITO.

[0392] [Middle layer (130)]

[0393] An intermediate layer (130) is disposed on the upper portion of the first electrode (110). The intermediate layer (130) includes a light-emitting layer.

[0394] The above intermediate layer (130) may further include a hole transport region disposed between the first electrode (110) and the light-emitting layer and an electron transport region disposed between the light-emitting layer and the second electrode (150).

[0395] The above intermediate layer (130) may further include, in addition to various organic materials, metal-containing compounds such as organometallic compounds, inorganic materials such as quantum dots, etc.

[0396] Meanwhile, the intermediate layer (130) may include i) two or more emitting units sequentially stacked between the first electrode (110) and the second electrode (150), and ii) a charge generation layer disposed between the two emitting units. When the intermediate layer (130) includes the emitting units and charge generation layer as described above, the emitting element (10) may be a tandem emitting element.

[0397] [Middle layer (130) with a fixed transport area]

[0398] The hole transport region may have i) a monolayer structure consisting of a single layer made of a single material, ii) a monolayer structure consisting of a single layer containing multiple different materials, or iii) a multilayer structure including multiple layers containing multiple different materials.

[0399] The hole transport region above may include a hole injection layer, a hole transport layer, a light-emitting auxiliary layer, an electron blocking layer, or any combination thereof.

[0400] For example, the hole transport region may have a multilayer structure of a hole injection layer / hole transport layer, a hole injection layer / hole transport layer / light-emitting auxiliary layer, a hole injection layer / light-emitting auxiliary layer, a hole transport layer / light-emitting auxiliary layer, or a hole injection layer / hole transport layer / electron blocking layer stacked sequentially from the first electrode (110).

[0401] The hole transport region may include a compound represented by the following chemical formula 201, a compound represented by the following chemical formula 202, or any combination thereof:

[0402] <Chemical Formula 201>

[0403]

[0404] <Chemical Formula 202>

[0405]

[0406] Among the above chemical formulas 201 and 202,

[0407] L 201 to L 204 are independent of each other, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and

[0408] L 205 은, *-O-*', *-S-*', *-N(Q 201 )-*', at least one R 10a C1-C substituted or unsubstituted 20 alkylene group, at least one R 10a C2-C substituted or unsubstituted 20 alkenylene group, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and

[0409] xa1 to xa4 are independently one of integers 0 to 5, and

[0410] xa5 is one of integers from 1 to 10, and

[0411] R 201 to R 204 and Q 201 are independent of each other, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and

[0412] R 201 and R202 is optionally a single bond, at least one R 10a A C1-C5 alkylene group substituted or unsubstituted with or at least one R 10a Connected to each other through C2-C5 alkenylene groups substituted or unsubstituted, at least one R 10a C8-C substituted or unsubstituted 60 It can form polycyclic groups (e.g., carbazole groups, etc.) (e.g., refer to the following compound HT16, etc.),

[0413] R 203 and R 204 is optionally a single bond, at least one R 10a A C1-C5 alkylene group substituted or unsubstituted with, or at least one R 10a Connected to each other through C2-C5 alkenylene groups substituted or unsubstituted, at least one R 10a C8-C substituted or unsubstituted 60 It can form polycyclic groups, and

[0414] na1 can be one of integers from 1 to 4.

[0415] For example, each of the above chemical formulas 201 and 202 may include at least one of the group represented by the following chemical formulas CY201 to CY217:

[0416]

[0417] Among the above chemical formulas CY201 to CY217, R 10b and R 10c Descriptions of each of R in this specification 10a Refer to the explanation for, and ring CY 201 Inner ring CY 204 are independently of each other, C3-C 20 Carbocyclic group, or C1-C 20It is a heterocyclic group, and at least one hydrogen of the chemical formulas CY201 to CY217 is R as described in this specification. 10a It can be substituted or unsubstituted.

[0418] According to one embodiment, among the chemical formulas CY201 to CY217, the ring CY 201 Inner ring CY 204 It can be a benzene group, a naphthalene group, a phenanthrene group, or an anthracene group independently of each other.

[0419] According to another embodiment, each of the above formulas 201 and 202 may include at least one of the group represented by the formulas CY201 to CY203.

[0420] According to another embodiment, the formula 201 may each include at least one of the group represented by formulas CY201 to CY203 and at least one of the group represented by formulas CY204 to CY217.

[0421] According to another embodiment, xa1 in the above chemical formula 201 is 1, and R 201 is a group represented by one of the above chemical formulas CY201 to CY203, xa2 is 0, and R 202 may be a group represented by one of the above chemical formulas CY204 to CY207.

[0422] According to another embodiment, each of the above formulas 201 and 202 may not include the group represented by the above formulas CY201 to CY203.

[0423] According to another embodiment, each of the above formulas 201 and 202 may not include the group represented by formulas CY201 to CY203 and may include at least one of the group represented by formulas CY204 to CY217.

[0424] As another example, each of the above chemical formulas 201 and 202 may not include the group represented by the above chemical formulas CY201 to CY217.

[0425] For example, the hole transport region is one of the following compounds HT1 to HT46, m-MTDATA, TDATA, 2-TNATA, NPB(NPD), β-NPB, TPD, Spiro-TPD, Spiro-NPB, methylated-NPB, TAPC, HMTPD, TCTA (4,4',4"-tris(N-carbazolyl)triphenylamine), Pani / DBSA (Polyaniline / Dodecylbenzenesulfonic acid), PEDOT / PSS (Poly(3,4-ethylenedioxythiophene) / Poly(4-styrenesulfonate)), Pani / CSA (Polyaniline / Camphor sulfonic acid It may include (polyaniline / campersulfonic acid)), PANI / PSS (polyaniline / poly(4-styrenesulfonate)), or any combination thereof:

[0426]

[0427]

[0428]

[0429]

[0430]

[0431]

[0432]

[0433]

[0434]

[0435]

[0436] The thickness of the hole transport region may be about 50 Å to about 10,000 Å, for example, about 100 Å to about 4,000 Å. If the hole transport region includes a hole injection layer, a hole transport layer, or any combination thereof, the thickness of the hole injection layer may be about 100 Å to about 9,000 Å, for example, about 100 Å to about 1,000 Å, and the thickness of the hole transport layer may be about 50 Å to about 2,000 Å, for example, about 100 Å to about 1,500 Å. When the thicknesses of the hole transport region, the hole injection layer, and the hole transport layer satisfy the ranges described above, satisfactory hole transport characteristics can be obtained without a substantial increase in driving voltage.

[0437] The above-mentioned light-emitting auxiliary layer is a layer that increases light emission efficiency by compensating for the optical resonance distance according to the wavelength of light emitted from the light-emitting layer, and the above-mentioned electron blocking layer is a layer that prevents electron leakage from the light-emitting layer to the hole transport region. A material that can be included in the aforementioned hole transport region may be included in the light-emitting auxiliary layer and the electron blocking layer.

[0438] [p-dopant]

[0439] In addition to the material described above, the hole transport region may include a charge-generating material to improve conductivity. The charge-generating material may be uniformly or non-uniformly dispersed within the hole transport region (e.g., in the form of a single layer consisting of the charge-generating material).

[0440] The above charge-generating material may be, for example, a p-dopant.

[0441] For example, the LUMO energy level of the above p-dopant may be -3.5 eV or less.

[0442] According to one embodiment, the p-dopant may include a quinone derivative, a cyano group-containing compound, an element EL1 and an element EL2-containing compound, or any combination thereof.

[0443] Examples of the above quinone derivatives may include TCNQ, F4-TCNQ, etc.

[0444] Examples of the above cyano group-containing compounds may include HAT-CN, compounds represented by the following chemical formula 221, etc.

[0445]

[0446] <Chemical Formula 221>

[0447]

[0448] Of the above chemical formula 221,

[0449] R 221 to R 223 are independent of each other, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and

[0450] The above R 221 to R 223 At least one of which is independently substituted with a cyano group; -F; -Cl; -Br; -I; a cyano group, -F, -Cl, -Br, -I, or any combination thereof C1-C 20 C3-C substituted with an alkyl group; or any combination thereof. 60 Carbocyclic group or C1-C 60 It can be a heterocyclic group.

[0451] Among the above-mentioned compounds containing elements EL1 and EL2, element EL1 may be a metal, a metalloid, or a combination thereof, and element EL2 may be a nonmetal, a metalloid, or a combination thereof.

[0452] Examples of the above metals are alkali metals (e.g., lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), etc.); alkaline earth metals (e.g., beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), etc.); transition metals (e.g., titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), technetium (Tc), rhenium (Re), iron (Fe), ruthenium (Ru), osmium (Os), cobalt (Co), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au), etc.); Transition metals (e.g., zinc (Zn), indium (In), tin (Sn), etc.); lanthanide metals (e.g., lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), etc.); etc. may be included.

[0453] Examples of the above metalloids may include silicon (Si), antimony (Sb), tellurium (Te), etc.

[0454] Examples of the above nonmetals may include oxygen (O), halogens (e.g., F, Cl, Br, I, etc.).

[0455] For example, the above-mentioned element EL1 and element EL2-containing compounds may include metal oxides, metal halides (e.g., metal fluorides, metal chlorides, metal bromides, metal iodides, etc.), metal halides (e.g., metal fluorides, metal chlorides, metal bromides, metal iodides, etc.), metal tellurides, or any combination thereof.

[0456] Examples of the above metal oxides may include tungsten oxide (e.g., WO, W2O3, WO2, WO3, W2O5, etc.), vanadium oxide (e.g., VO, V2O3, VO2, V2O5, etc.), molybdenum oxide (MoO, Mo2O3, MoO2, MoO3, Mo2O5, etc.), rhenium oxide (e.g., ReO3, etc.).

[0457] Examples of the above metal halides may include alkali metal halides, alkaline earth metal halides, transition metal halides, post-transition metal halides, lanthanide metal halides, etc.

[0458] Examples of the above alkali metal halides may include LiF, NaF, KF, RbF, CsF, LiCl, NaCl, KCl, RbCl, CsCl, LiBr, NaBr, KBr, RbBr, CsBr, LiI, NaI, KI, RbI, CsI, etc.

[0459] Examples of the above alkaline earth metal halides may include BeF2, MgF2, CaF2, SrF2, BaF2, BeCl2, MgCl2, CaCl2, SrCl2, BaCl2, BeBr2, MgBr2, CaBr2, SrBr2, BaBr2, BeI2, MgI2, CaI2, SrI2, BaI2, etc.

[0460] Examples of the above transition metal halides include titanium halides (e.g., TiF4, TiCl4, TiBr4, TiI4, etc.), zirconium halides (e.g., ZrF4, ZrCl4, ZrBr4, ZrI4, etc.), hafnium halides (e.g., HfF4, HfCl4, HfBr4, HfI4, etc.), vanadium halides (e.g., VF3, VCl3, VBr3, VI3, etc.), niobium halides (e.g., NbF3, NbCl3, NbBr3, NbI3, etc.), tantalum halides (e.g., TaF3, TaCl3, TaBr3, TaI3, etc.), chromium halides (e.g., CrF3, CrCl3, CrBr3, CrI3, etc.), molybdenum halides (e.g., MoF3, MoCl3, MoBr3, MoI3, etc.), and tungsten. Halides (e.g., WF3, WCl3, WBr3, WI3, etc.), manganese halides (e.g., MnF2, MnCl2, MnBr2, MnI2, etc.), technetium halides (e.g., TcF2, TcCl2, TcBr2, TcI2, etc.), rhenium halides (e.g., ReF2, ReCl2, ReBr2, ReI2, etc.), iron halides (e.g., FeF2, FeCl2, FeBr2, FeI2, etc.), ruthenium halides (e.g., RuF2, RuCl2, RuBr2, RuI2, etc.), osmium halides (e.g., OsF2, OsCl2, OsBr2, OsI2, etc.), cobalt halides (e.g., CoF2, CoCl2, CoBr2, CoI2, etc.), rhodium halides (e.g., RhF2, RhCl2, RhBr2, RhI2, etc.), iridium halides (e.g., IrF2, IrCl2, IrBr2, IrI2, etc.), nickel halides (e.g., NiF2, NiCl2, NiBr2, NiI2, etc.), palladium halides (e.g., PdF2, PdCl2, PdBr2, PdI2, etc.), platinum halides (e.g., PtF2, PtCl2, PtBr2, PtI2, etc.), copper halides (e.g., CuF, CuCl, CuBr, CuI, etc.),It may include silver halides (e.g., AgF, AgCl, AgBr, AgI, etc.), gold halides (e.g., AuF, AuCl, AuBr, AuI, etc.), etc.

[0461] Examples of the above-mentioned transition metal halides may include zinc halides (e.g., ZnF2, ZnCl2, ZnBr2, ZnI2, etc.), indium halides (e.g., InI3, etc.), tin halides (e.g., SnI2, etc.), etc.

[0462] Examples of the above lanthanide metal halides may include YbF, YbF2, YbF3, SmF3, YbCl, YbCl2, YbCl3SmCl3, YbBr, YbBr2, YbBr3, SmBr3, YbI, YbI2, YbI3, SmI3, etc.

[0463] Examples of the metalloid halides mentioned above may include antimony halides (e.g., SbCl5, etc.).

[0464] Examples of the above metal tellurides include alkali metal tellurides (e.g., Li2Te, Na2Te, K2Te, Rb2Te, Cs2Te, etc.), alkaline earth metal tellurides (e.g., BeTe, MgTe, CaTe, SrTe, BaTe, etc.), transition metal tellurides (e.g., TiTe2, ZrTe2, HfTe2, V2Te3, Nb2Te3, Ta2Te3, Cr2Te3, Mo2Te3, W2Te3, MnTe, TcTe, ReTe, FeTe, RuTe, OsTe, CoTe, RhTe, IrTe, NiTe, PdTe, PtTe, Cu2Te, CuTe, Ag2Te, AgTe, Au2Te, etc.), post-transition metal tellurides (e.g., ZnTe, etc.), and lanthanide metal tellurides (e.g., LaTe, CeTe, PrTe, NdTe, PmTe, EuTe, GdTe, It may include TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, etc.

[0465] [Emitting layer in the middle layer (130)]

[0466] When the light-emitting element (10) is a full-color light-emitting element, the light-emitting layer may be patterned into a red light-emitting layer, a green light-emitting layer, and / or a blue light-emitting layer for each individual subpixel. Alternatively, the light-emitting layer may have a structure in which two or more layers among the red light-emitting layer, the green light-emitting layer, and the blue light-emitting layer are stacked in contact or spaced apart, or may have a structure in which two or more materials among the red light-emitting material, the green light-emitting material, and the blue light-emitting material are mixed without layer separation, thereby emitting white light.

[0467] The light-emitting layer may include a host (e.g., a first host, a second host) and a dopant (e.g., a first dopant, and a second dopant). Descriptions of the light-emitting layer, the first host, the second host, the first dopant, and the second dopant are respectively referred to in the present specification.

[0468] The thickness of the light-emitting layer may be about 100 Å to about 1000 Å, for example, about 200 Å to about 600 Å. When the thickness of the light-emitting layer satisfies the range described above, excellent light-emitting characteristics can be exhibited without a substantial increase in driving voltage.

[0469] [Host]

[0470] The above host may further include a compound represented by the following chemical formula 301 in addition to the above first host and second host:

[0471] <Chemical Formula 301>

[0472] [Ar 301 ] xb11 -[(L 301 ) xb1 -R 301 ] xb21

[0473] Among the above chemical formula 301,

[0474] Ar 301 and L 301 are independent of each other, at least one R10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and

[0475] xb11 is 1, 2, or 3, and

[0476] xb1 is one of integers from 0 to 5, and

[0477] R 301 Silver, hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, at least one R 10a C1-C substituted or unsubstituted 60 alkyl group, at least one R 10a C2-C substituted or unsubstituted 60 alkenyl group, at least one R 10a C2-C substituted or unsubstituted 60 alkynyl group, at least one R 10a C1-C substituted or unsubstituted 60 Alkoxy group, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, at least one R 10a C1-C substituted or unsubstituted 60 Heterocyclic group, -Si(Q 301 )(Q 302 )(Q 303 ), -N(Q 301 )(Q 302 ), -B(Q 301 )(Q 302 ), -C(=O)(Q 301 ), -S(=O)2(Q 301 ), or -P(=O)(Q 301 )(Q 302 ) and,

[0478] xb21 is one of integers from 1 to 5, and

[0479] Q 301 to Q 303For a description of each, refer to the description of Q1 in this specification.

[0480] For example, if xb11 in the above chemical formula 301 is 2 or more, then 2 or more Ar 301 They can be connected to each other through a single bond.

[0481] As another example, the host may further include a compound represented by the following chemical formula 301-1, a compound represented by the following chemical formula 301-2, or any combination thereof:

[0482] <Chemical Formula 301-1>

[0483]

[0484] <Chemical Formula 301-2>

[0485]

[0486] Of the above chemical formulas 301-1 and 301-2,

[0487] Ring A 301 inner ring A 304 are independent of each other, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and

[0488] X 301 is O, S, N-[(L 304 ) xb4 -R 304 ], C(R 304 )(R 305 ), or Si(R 304 )(R 305 ) and,

[0489] xb22 and xb23 are independently 0, 1, or 2, and

[0490] L 301 , xb1 and R 301 For descriptions thereof, refer to those described in this specification, and

[0491] L 302 to L 304 The descriptions regarding are independent of each other, the above L 301 Refer to the explanation for,

[0492] The descriptions for xb2 to xb4 are independent of each other, and refer to the description for xb1 above, and

[0493] R 302 to R 305 and R 311 to R 314 The explanation for each of the above R 301 Refer to the explanation for.

[0494] As another example, the host may further comprise an alkaline earth metal complex, a post-transition metal complex, or any combination thereof. For example, the host may further comprise a Be complex (e.g., compound H55 below), an Mg complex, a Zn complex, or any combination thereof.

[0495] As another example, the host may further comprise one of the following compounds H1 to H124, ADN (9,10-Di(2-naphthyl)anthracene), MADN (2-Methyl-9,10-bis(naphthalen-2-yl)anthracene), TBADN (9,10-di-(2-naphthyl)-2-t-butyl-anthracene), CBP (4,4′-bis(N-carbazolyl)-1,1′-biphenyl), mCP (1,3-di-9-carbazolylbenzene), TCP (1,3,5-tri(carbazol-9-yl)benzene), or any combination thereof:

[0496]

[0497]

[0498]

[0499]

[0500]

[0501]

[0502]

[0503]

[0504]

[0505]

[0506]

[0507]

[0508]

[0509]

[0510] [Delayed Fluorescence]

[0511] [Quantum Dot]

[0512] The above-mentioned light-emitting layer may include quantum dots.

[0513] In this specification, a quantum dot refers to a crystal of a semiconductor compound and may include any material capable of emitting light of various emission wavelengths depending on the size of the crystal.

[0514] The diameter of the above quantum dots may be, for example, about 1 nm to 10 nm.

[0515] The above quantum dots can be synthesized by a wet chemical process, an organometallic chemical vapor deposition process, a molecular beam epitaxy process, or a similar process.

[0516] The above wet chemical process is a method of growing quantum dot particle crystals after mixing an organic solvent and a precursor material. When the crystals grow, the organic solvent naturally acts as a dispersant coordinated to the surface of the quantum dot crystals and controls the growth of the crystals. Therefore, the growth of quantum dot particles can be controlled through a process that is easier and lower cost than vapor deposition methods such as Metal Organic Chemical Vapor Deposition (MOCVD) or Molecular Beam Epitaxy (MBE).

[0517] The above quantum dots may include a group II-VI semiconductor compound; a group III-V semiconductor compound; a group III-VI semiconductor compound; a group I-III-VI semiconductor compound; a group IV-VI semiconductor compound; a group IV element or compound; or any combination thereof.

[0518] Examples of the above-mentioned group II-VI semiconductor compounds include binary compounds such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, etc.; ternary compounds such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, etc.; It may include four-element compounds such as CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, etc.; or any combination thereof.

[0519] Examples of the above III-V semiconductor compounds may include binary compounds such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, etc.; ternary compounds such as GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, InPSb, etc.; quaternary compounds such as GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, etc.; or any combination thereof. Meanwhile, the above III-V semiconductor compounds may further include a group II element. Examples of III-V semiconductor compounds containing additional group II elements may include InZnP, InGaZnP, InAlZnP, etc.

[0520] Examples of the above-mentioned group III-VI semiconductor compounds include binary compounds such as GaS, GaSe, Ga2Se3, GaTe, InS, InSe, In2S3, In2Se3, InTe, etc.; InGaS 3 It may include ternary compounds such as InGaSe3, etc.; or any combination thereof.

[0521] Examples of the above-mentioned group I-III-VI semiconductor compounds may include ternary compounds such as AgInS, AgInS2, CuInS, CuInS2, CuGaO2, AgGaO2, AgAlO2, etc.; or any combination thereof.

[0522] Examples of the above-mentioned group IV-VI semiconductor compounds may include binary compounds such as SnS, SnSe, SnTe, PbS, PbSe, PbTe, etc.; ternary compounds such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, etc.; quaternary compounds such as SnPbSSe, SnPbSeTe, SnPbSTe, etc.; or any combination thereof.

[0523] The above Group IV elements or compounds may include single-element compounds such as Si, Ge, etc.; dual-element compounds such as SiC, SiGe, etc.; or any combination thereof.

[0524] Each element included in the multi-element compounds, such as the above-mentioned binary compounds, ternary compounds, and quaternary compounds, may exist within the particle at a uniform or non-uniform concentration.

[0525] Meanwhile, the above quantum dot may have a single structure in which the concentration of each element contained in the quantum dot is uniform, or a core-shell dual structure. For example, the material contained in the core and the material contained in the shell may be different from each other.

[0526] The shell of the quantum dot can serve as a protective layer to maintain semiconductor properties by preventing chemical degradation of the core and / or as a charging layer to impart electrophoretic properties to the quantum dot. The shell may be a single layer or a multilayer. The interface between the core and the shell may have a concentration gradient in which the concentration of elements present in the shell decreases toward the center.

[0527] Examples of the shell of the above quantum dot include oxides of metals, metalloids, or nonmetals, semiconductor compounds, or combinations thereof. Examples of the oxides of metals, metalloids, or nonmetals may include binary compounds such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, NiO, etc.; ternary compounds such as MgAl2O4, CoFe2O4, NiFe2O4, CoMn2O4, etc.; or any combination thereof. Examples of the above semiconductor compounds may include group II-VI semiconductor compounds; group III-V semiconductor compounds; group III-VI semiconductor compounds; group I-III-VI semiconductor compounds; group IV-VI semiconductor compounds; or any combination thereof, as described in this specification. For example, the semiconductor compound may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, or any combination thereof.

[0528] Quantum dots can have a full width of half maximum (FWHM) of the emission wavelength spectrum of about 45 nm or less, specifically about 40 nm or less, and more specifically about 30 nm or less, and color purity or color reproducibility can be improved in this range. In addition, since the light emitted through these quantum dots is emitted in all directions, the wide viewing angle can be improved.

[0529] In addition, the shape of the quantum dots can specifically be spherical, pyramidal, multi-arm, or cubic nanoparticles, nanotubes, nanowires, nanofibers, nanoplate-like particles, etc.

[0530] By controlling the size of the quantum dots, the energy band gap can be controlled, allowing light of various wavelengths to be obtained from the quantum dot light-emitting layer. Therefore, by using quantum dots of different sizes, a light-emitting device that emits light of various wavelengths can be realized. Specifically, the size of the quantum dots can be selected to emit red, green, and / or blue light. Additionally, the size of the quantum dots can be configured to emit white light by combining light of various colors.

[0531] [Electronic transport region in the middle layer (130)]

[0532] The electron transport region may have i) a single-layer structure consisting of a single layer made of a single material, ii) a single-layer structure consisting of a plurality of different materials, or iii) a multilayer structure including a plurality of layers containing a plurality of different materials.

[0533] The above electron transport region may include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0534] For example, the electron transport region may have a structure such as an electron transport layer / electron injection layer, a hole blocking layer / electron transport layer / electron injection layer, an electron control layer / electron transport layer / electron injection layer, or a buffer layer / electron transport layer / electron injection layer stacked sequentially from the light-emitting layer.

[0535] The electron transport region (e.g., a buffer layer, a hole blocking layer, an electron control layer, or an electron transport layer among the electron transport regions) comprises at least one π electron-deficient nitrogen-containing C1-C 60 cyclic group (π electron-deficient nitrogen-containing C1-C 60 It may include metal-free compounds containing a cyclic group.

[0536] For example, the electron transport region may include a compound represented by the following chemical formula 601.

[0537] <Chemical Formula 601>

[0538] [Ar 601 ] xe11 -[(L 601 ) xe1 -R 601 ] xe21

[0539] Among the above chemical formula 601,

[0540] Ar 601 , and L 601 are independent of each other, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and

[0541] xe11 is 1, 2, or 3, and

[0542] xe1 is 0, 1, 2, 3, 4, or 5, and

[0543] R 601 is, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, at least one R 10a C1-C substituted or unsubstituted 60 Heterocyclic group, -Si(Q 601 )(Q 602 )(Q 603 ), -C(=O)(Q 601 ), -S(=O)2(Q 601 ), or -P(=O)(Q 601 )(Q 602 ) and,

[0544] Above Q 601 to Q 603 For descriptions regarding each, refer to the description of Q1 in this specification, and

[0545] xe21 is 1, 2, 3, 4, or 5, and

[0546] The above Ar 601 , L 601 and R 601 At least one of them is independent of each other, at least one R 10a π electron-deficient nitrogenous C1-C substituted or unsubstituted 60 It could be a click group.

[0547] For example, if xe11 in the above chemical formula 601 is 2 or more, then 2 or more Ar 601 They can be connected to each other through a single bond.

[0548] As another example, Ar in the above chemical formula 601 601 is at least one R 10a It may be an anthracene group that is substituted or unsubstituted.

[0549] As another example, the electron transport region may include a compound represented by the following chemical formula 601-1:

[0550] <Chemical Formula 601-1>

[0551]

[0552] In the above chemical formula 601-1,

[0553] X 614 is N or C(R 614 ) and, X 615 is N or C(R 615 ) and, X 616 is N or C(R 616 ) and, X 614 To X 616 At least one of them is N, and

[0554] L 611 to L 613 The explanation for each of the above L 601 Refer to the explanation for,

[0555] For descriptions of xe611 to xe613, refer to the description of xe1 above, and

[0556] R 611 to R 613 The explanation for each of the above R 601 Refer to the explanation for,

[0557] R 614 to R 616 They are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1-C 20 Alkyl group, C1-C 20 Alkoxy group, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It can be a heterocyclic group.

[0558] For example, xe1 and xe611 to xe613 in the above chemical formulas 601 and 601-1 may be 0, 1, or 2 independently of each other.

[0559] The electron transport region may comprise one of the following compounds ET1 to ET45, BCP (2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline), Bphen (4,7-Diphenyl-1,10-phenanthroline), Alq3, BAlq, TAZ, NTAZ, or any combination thereof:

[0560]

[0561]

[0562]

[0563]

[0564]

[0565]

[0566]

[0567] The thickness of the electron transport region may be about 100 Å to about 5000 Å, for example, about 160 Å to about 4000 Å. If the electron transport region includes a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, or any combination thereof, the thickness of the buffer layer, the hole blocking layer, or the electron control layer may be independently about 20 Å to about 1000 Å, for example, about 30 Å to about 300 Å, and the thickness of the electron transport layer may be about 100 Å to about 1000 Å, for example, about 150 Å to about 500 Å. When the thickness of the buffer layer, the hole blocking layer, the electron control layer, the electron transport layer, and / or the electron transport region satisfies the ranges described above, satisfactory electron transport characteristics can be obtained without a substantial increase in driving voltage.

[0568] The above electron transport region (e.g., the electron transport layer among the electron transport regions) may further include a metal-containing material in addition to the material described above.

[0569] The metal-containing material may include an alkali metal complex, an alkaline earth metal complex, or any combination thereof. The metal ions of the alkali metal complex may be Li ions, Na ions, K ions, Rb ions, or Cs ions, and the metal ions of the alkaline earth metal complex may be Be ions, Mg ions, Ca ions, Sr ions, or Ba ions. The ligands coordinated to the metal ions of the alkali metal complex and the alkaline earth metal complex may independently include hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline, cyclopentadiene, or any combination thereof.

[0570] For example, the metal-containing material may include a Li complex. The Li complex may include, for example, the following compounds ET-D1 (LiQ) or ET-D2:

[0571]

[0572] The above electron transport region may include an electron injection layer that facilitates electron injection from the second electrode (150). The electron injection layer may be in direct contact with the second electrode (150).

[0573] The electron injection layer may have i) a single-layer structure consisting of a single layer made of a single material, ii) a single-layer structure consisting of a plurality of different materials, or iii) a multilayer structure having a plurality of layers containing a plurality of different materials.

[0574] The electron injection layer may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof.

[0575] The alkali metal may include Li, Na, K, Rb, Cs, or any combination thereof. The alkaline earth metal may include Mg, Ca, Sr, Ba, or any combination thereof. The rare earth metal may include Sc, Y, Ce, Tb, Yb, Gd, or any combination thereof.

[0576] The alkali metal-containing compound, alkaline earth metal-containing compound and the rare earth metal-containing compound may include oxides, halides (e.g., fluorides, chlorides, bromides, iodides, etc.), tellurides, or any combination thereof of the alkali metal, alkaline earth metal, and rare earth metal, respectively.

[0577] The above alkali metal-containing compound may include alkali metal oxides such as Li2O, Cs2O, K2O, etc., alkali metal halides such as LiF, NaF, CsF, KF, LiI, NaI, CsI, KI, etc., or any combination thereof. The above alkaline earth metal-containing compound may include BaO, SrO, CaO, Ba x Sr 1-x O(x is 0 <x<1를 만족하는 실수임), Ba x Ca 1-x O(x is 0 <x<1를 만족하는 실수임) 등과 같은 알칼리 토금속 산화물을 포함할 수 있다. 상기 희토류 금속-함유 화합물은, YbF3, ScF3, Sc2O3, Y2O3, Ce2O3, GdF3, TbF3, YbI3, ScI3, TbI3, 또는 이의 임의의 조함을 포함할 수 있다. 또는, 상기 희토류 금속-함유 화합물은, 란타나이드 금속 텔루라이드를 포함할 수 있다. 상기 란타나이드 금속 텔루라이드의 예는, LaTe, CeTe, PrTe, NdTe, PmTe, SmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, La2Te3, Ce2Te3, Pr2Te3, Nd2Te3, Pm2Te3, Sm2Te3, Eu2Te3, Gd2Te3, Tb2Te3, Dy2Te3, Ho2Te3, Er2Te3, Tm2Te3, Yb2Te3, Lu2Te3등을 포함할 수 있다.

[0578] The above alkali metal complex, alkaline earth metal complex, and rare earth metal complex may comprise i) one of the ions of the alkali metal, alkaline earth metal, and rare earth metal as described above, and ii) a ligand bound to the metal ion, for example, hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline, cyclopentadiene, or any combination thereof.

[0579] The electron injection layer described above may consist only of alkali metals, alkaline earth metals, rare earth metals, alkali metal-containing compounds, alkaline earth metal-containing compounds, rare earth metal-containing compounds, alkali metal complexes, alkaline earth metal complexes, rare earth metal complexes, or any combination thereof, or may further include organic materials (e.g., compounds represented by the chemical formula 601).

[0580] According to one embodiment, the electron injection layer may be composed of i) an alkali metal-containing compound (e.g., an alkali metal halide), or ii) a) an alkali metal-containing compound (e.g., an alkali metal halide); and b) an alkali metal, an alkaline earth metal, a rare earth metal, or any combination thereof. For example, the electron injection layer may be a KI:Yb co-deposited layer, an RbI:Yb co-deposited layer, etc.

[0581] If the electron injection layer further comprises an organic material, the alkali metal, alkaline earth metal, rare earth metal, alkali metal-containing compound, alkaline earth metal-containing compound, rare earth metal-containing compound, alkali metal complex, alkaline earth metal complex, rare earth metal complex, or any combination thereof may be uniformly or non-uniformly dispersed in a matrix containing the organic material.

[0582] The thickness of the electron injection layer may be about 1 Å to about 100 Å or about 3 Å to about 90 Å. When the thickness of the electron injection layer satisfies the range described above, satisfactory electron injection characteristics can be obtained without a substantial increase in driving voltage.

[0583] [Second electrode (150)]

[0584] A second electrode (150) is disposed on the upper portion of the intermediate layer (130) as described above. The second electrode (150) may be a cathode, which is an electron injection electrode. In this case, a metal, alloy, electrically conductive compound, or any combination thereof having a low work function may be used as the material for the second electrode (150).

[0585] The second electrode (150) may include lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), ytterbium (Yb), silver-ytterbium (Ag-Yb), ITO, IZO, or any combination thereof. The second electrode (150) may be a transmissive electrode, a semitransmissive electrode, or a reflective electrode.

[0586] The second electrode (150) may have a single-layer structure or a multi-layer structure having multiple layers.

[0587] [Capping layer]

[0588] A first capping layer may be disposed on the outer side of the first electrode (110), and / or a second capping layer may be disposed on the outer side of the second electrode (150). Specifically, the light-emitting element (10) may have a structure in which the first capping layer, the first electrode (110), the intermediate layer (130), and the second electrode (150) are stacked in order, a structure in which the first electrode (110), the intermediate layer (130), the second electrode (150), and the second capping layer are stacked in order, or a structure in which the first capping layer, the first electrode (110), the intermediate layer (130), the second electrode (150), and the second capping layer are stacked in order.

[0589] Light generated in the light-emitting layer of the intermediate layer (130) of the light-emitting element (10) can be emitted to the outside through the first electrode (110), which is a semi-transparent electrode or a transparent electrode, and the first capping layer, and light generated in the light-emitting layer of the intermediate layer (130) of the light-emitting element (10) can be emitted to the outside through the second electrode (150), which is a semi-transparent electrode or a transparent electrode, and the second capping layer.

[0590] The first capping layer and the second capping layer can serve to improve external light emission efficiency based on the principle of constructive interference. As a result, the light extraction efficiency of the light-emitting element (10) is increased, and the light emission efficiency of the light-emitting element (10) can be improved.

[0591] Each of the first capping layer and the second capping layer may include a material having a refractive index of 1.6 or higher (at 589 nm).

[0592] The first capping layer and the second capping layer may independently be an organic capping layer containing organic material, an inorganic capping layer containing inorganic material, or an organic-inorganic composite capping layer containing organic material and inorganic material.

[0593] At least one of the first capping layer and the second capping layer may independently comprise a carbocyclic compound, a heterocyclic compound, an amine group-containing compound, porphine derivatives, phthalocyanine derivatives, naphthalocyanine derivatives, an alkali metal complex, an alkaline earth metal complex, or any combination thereof. The carbocyclic compound, the heterocyclic compound, and the amine group-containing compound may optionally be substituted with a substituent comprising O, N, S, Se, Si, F, Cl, Br, I, or any combination thereof. According to one embodiment, at least one of the first capping layer and the second capping layer may independently comprise an amine group-containing compound.

[0594] For example, at least one of the first capping layer and the second capping layer may independently include a compound represented by Formula 201, a compound represented by Formula 202, or any combination thereof.

[0595] According to another embodiment, at least one of the first capping layer and the second capping layer may independently comprise one of the compounds HT28 to HT33, one of the following compounds CP1 to CP6, β-NPB, or any of the same:

[0596]

[0597]

[0598] [Electronic device]

[0599] The light-emitting element may be included in various electronic devices. For example, an electronic device including the light-emitting element may be a light-emitting device, an authentication device, etc.

[0600] The electronic device (e.g., light-emitting device) may further include, in addition to the light-emitting element, i) a color filter, ii) a color conversion layer, or iii) a color filter and a color conversion layer. The color filter and / or color conversion layer may be disposed in at least one direction of propagation of light emitted from the light-emitting element. For example, the light emitted from the light-emitting element may be blue light or white light. Refer to the description of the light-emitting element above. According to one embodiment, the color conversion layer may include quantum dots. The quantum dots may be, for example, quantum dots as described in this specification.

[0601] The electronic device may include a first substrate. The first substrate may include a plurality of subpixel regions, the color filter may include a plurality of color filter regions corresponding to each of the plurality of subpixel regions, and the color conversion layer may include a plurality of color conversion regions corresponding to each of the plurality of subpixel regions.

[0602] A pixel defining film is placed between the plurality of subpixel regions above to define each subpixel region.

[0603] The above color filter may further include a plurality of color filter regions and a light-blocking pattern disposed between the plurality of color filter regions, and the color conversion layer may further include a plurality of color conversion regions and a light-blocking pattern disposed between the plurality of color conversion regions.

[0604] The plurality of color filter regions (or plurality of color conversion regions) comprises a first region emitting a first color light; a second region emitting a second color light; and / or a third region emitting a third color light, wherein the first color light, the second color light, and / or the third color light may have different maximum emission wavelengths. For example, the first color light may be red light, the second color light may be green light, and the third color light may be blue light. For example, the plurality of color filter regions (or plurality of color conversion regions) may include quantum dots. Specifically, the first region may include red quantum dots, the second region may include green quantum dots, and the third region may not include quantum dots. Refer to the description of quantum dots as provided in this specification. The first region, the second region, and / or the third region may each further include scatterers.

[0605] For example, the light-emitting element may emit a first light, the first region may absorb the first light to emit a first-1 color light, the second region may absorb the first light to emit a second-1 color light, and the third region may absorb the first light to emit a third-1 color light. In this case, the first-1 color light, the second-1 color light, and the third-1 color light may have different maximum emission wavelengths. Specifically, the first light may be blue light, the first-1 color light may be red light, the second-1 color light may be green light, and the third-1 color light may be blue light.

[0606] The above electronic device may further include a thin-film transistor in addition to the light-emitting element described above. The thin-film transistor may include a source electrode, a drain electrode, and an active layer, and either one of the source electrode and the drain electrode may be electrically connected to either one of the first electrode and the second electrode of the light-emitting element.

[0607] The above thin-film transistor may further include a gate electrode, a gate insulating film, etc.

[0608] The above active layer may include crystalline silicon, amorphous silicon, organic semiconductor, oxide semiconductor, etc.

[0609] The electronic device may further include a sealing portion for sealing a light-emitting element. The sealing portion may be disposed between the color filter and / or color conversion layer and the light-emitting element. The sealing portion allows light from the light-emitting element to be emitted to the outside while simultaneously blocking external air and moisture from penetrating the light-emitting element. The sealing portion may be a sealing substrate comprising a transparent glass substrate or a plastic substrate. The sealing portion may be a thin film encapsulation layer comprising one or more organic and / or inorganic layers. If the sealing portion is a thin film encapsulation layer, the electronic device may be flexible.

[0610] On the sealing portion, in addition to the color filter and / or color conversion layer, various functional layers may be additionally disposed depending on the application of the electronic device. Examples of the functional layers may include a touchscreen layer, a polarizing layer, etc. The touchscreen layer may be a pressure-sensitive touchscreen layer, a capacitive touchscreen layer, or an infrared touchscreen layer. The authentication device may be, for example, a biometric authentication device that authenticates an individual using biometric information (e.g., fingertip, pupil, etc.).

[0611] The above authentication device may further include means for collecting biometric information in addition to the light-emitting element as described above.

[0612] The above electronic device can be applied to various displays, light sources, lighting, personal computers (e.g., mobile personal computers), mobile phones, digital cameras, electronic notebooks, electronic dictionaries, electronic game consoles, medical devices (e.g., electronic thermometers, blood pressure monitors, blood glucose meters, pulse measuring devices, pulse wave measuring devices, electrocardiogram display devices, ultrasound diagnostic devices, endoscope display devices), fish finders, various measuring instruments, instruments (e.g., instruments for vehicles, aircraft, and ships), projectors, etc.

[0613] [Explanation of Figures 2 and 3]

[0614] FIG. 2 is a cross-sectional view of a light-emitting device according to one embodiment of the present invention.

[0615] The light-emitting device of FIG. 2 includes a substrate (100), a thin-film transistor (TFT), a light-emitting element, and a sealing portion (300) that seals the light-emitting element.

[0616] The substrate (100) may be a flexible substrate, a glass substrate, or a metal substrate. A buffer layer (210) may be disposed on the substrate (100). The buffer layer (210) may prevent the penetration of impurities through the substrate (100) and may serve to provide a flat surface on the upper surface of the substrate (100).

[0617] A thin-film transistor (TFT) may be disposed on the buffer layer (210). The thin-film transistor (TFT) may include an active layer (220), a gate electrode (240), a source electrode (260), and a drain electrode (270).

[0618] The active layer (220) may include an inorganic semiconductor, an organic semiconductor, or an oxide semiconductor such as silicon or polysilicon, and includes a source region, a drain region, and a channel region.

[0619] A gate insulating film (230) for insulating the active layer (220) and the gate electrode (240) may be disposed on the upper part of the active layer (220), and a gate electrode (240) may be disposed on the upper part of the gate insulating film (230).

[0620] An interlayer insulating film (250) may be disposed on the upper portion of the gate electrode (240). The interlayer insulating film (250) is disposed between the gate electrode (240) and the source electrode (260) and between the gate electrode (240) and the drain electrode (270) to insulate them.

[0621] A source electrode (260) and a drain electrode (270) may be disposed on the interlayer insulating film (250). The interlayer insulating film (250) and the gate insulating film (230) may be formed so as to expose the source region and the drain region of the active layer (220), and the source electrode (260) and the drain electrode (270) may be disposed to be in contact with the exposed source region and the drain region of the active layer (220).

[0622] Such a thin-film transistor (TFT) can be electrically connected to a light-emitting element to drive the light-emitting element and is covered and protected by a passivation layer (280). The passivation layer (280) may include an inorganic insulating film, an organic insulating film, or a combination thereof. A light-emitting element is provided on the passivation layer (280). The light-emitting element includes a first electrode (110), an intermediate layer (130), and a second electrode (150).

[0623] The first electrode (110) may be disposed on the passivation layer (280). The passivation layer (280) may be disposed so as to expose a certain area without covering the entire drain electrode (270), and the first electrode (110) may be disposed to be connected to the exposed drain electrode (270).

[0624] A pixel defining film (290) including an insulating material may be disposed on the first electrode (110). The pixel defining film (290) exposes a predetermined area of ​​the first electrode (110), and an intermediate layer (130) may be formed in the exposed area. The pixel defining film (290) may be a polyimide or polyacrylic-based organic film. Although not shown in FIG. 2, some or more layers of the intermediate layer (130) may extend to the upper part of the pixel defining film (290) and be disposed in the form of a common layer.

[0625] A second electrode (150) is disposed on the intermediate layer (130), and a capping layer (170) may be additionally formed on the second electrode (150). The capping layer (170) may be formed to cover the second electrode (150).

[0626] A sealing portion (300) may be disposed on the capping layer (170). The sealing portion (300) may be disposed on a light-emitting element and serve to protect the light-emitting element from moisture or oxygen. The sealing portion (300) may include an inorganic film comprising silicon nitride (SiNx), silicon oxide (SiOx), indium tin oxide, indium zinc oxide, or any combination thereof; an organic film comprising polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane, an acrylic resin (e.g., polymethyl methacrylate, polyacrylic acid, etc.), an epoxy resin (e.g., AGE (aliphatic glycidyl ether), etc.) or any combination thereof; or a combination of an inorganic film and an organic film.

[0627] FIG. 3 is a cross-sectional view of a light-emitting device according to another embodiment of the present invention.

[0628] The light-emitting device of FIG. 3 is the same light-emitting device as FIG. 2, except that a light-blocking pattern (500) and a functional area (400) are additionally disposed on the upper part of the encapsulation portion (300). The functional area (400) may be i) a color filter area, ii) a color conversion area, or iii) a combination of a color filter area and a color conversion area. According to one embodiment, the light-emitting element included in the light-emitting device of FIG. 3 may be a tandem light-emitting element.

[0629] [Manufacturing Method]

[0630] Each layer included in the hole transport region, each light-emitting layer, and each layer included in the electron transport region can be formed in a predetermined region using various methods such as vacuum deposition, spin coating, casting, LB method (Langmuir-Blodgett), inkjet printing, laser printing, and laser thermal imaging (LITI).

[0631] When each layer included in the hole transport region, the emissive layer, and each layer included in the electron transport region are formed by vacuum deposition, the deposition conditions are, for example, a deposition temperature of about 100 to about 500°C, and about 10 -8 to about 10 -3 Within a vacuum level of torr and a deposition rate range of about 0.01 to about 100 Å / sec, the material to be included in the layer to be formed and the structure of the layer to be formed can be selected.

[0632] [Definition of Terms]

[0633] C3-C in this specification 60 A carbocyclic group refers to a cyclic group having 3 to 60 carbon atoms, consisting solely of carbon as ring-forming atoms, and C1-C 60 A heterocyclic group refers to a cyclic group having 1 to 60 carbon atoms that includes, in addition to carbon, a heteroatom as a ring-forming atom. The above C3-C60 Carbocyclic group and C1-C 60 Each heterocyclic group may be a monocyclic group consisting of one ring or a polycyclic group in which two or more rings are condensed together. For example, the above C1-C 60 The number of ring-forming atoms in a heterocyclic group can be 3 to 61.

[0634] In this specification, the cyclic group is the above C3-C 60 Carbocyclic group and C1-C 60 Includes all heterocyclic groups.

[0635] In this specification, π electron-excess C3-C 60 cyclic group (π electron-rich C3-C 60 A cyclic group refers to a cyclic group having 3 to 60 carbon atoms that does not contain *-N=*' as a ring-forming moiety, and π electron-deficient nitrogen-containing C1-C 60 cyclic group (π electron-deficient nitrogen-containing C1-C 60 A cyclic group refers to a heterocyclic group having 1 to 60 carbon atoms containing *-N=*' as a ring-forming moiety.

[0636] for example,

[0637] The above C3-C 60The carbocyclic group may be i) group T1 or ii) a condensed ring group formed by the condensation of two or more groups T1 (e.g., cyclopentadiene group, adamantane group, norbornane group, benzene group, pentylene group, naphthalene group, azulene group, indacene group, acenaphtylene group, phenalene group, phenanthrene group, anthracene group, fluoranthene group, triphenylene group, pyrene group, chrysene group, perylene group, pentapene group, heptylene group, naphthacene group, fisene group, hexacene group, pentacene group, rubicene group, coronene group, ovalene group, indene group, fluorene group, spiro-bifluorene group, benzofluorene group, indenophenanthrene group, or indenoanthracene group), and

[0638] The above C1-C 60A heterocyclic group is i) group T2, ii) a condensed ring group formed by the condensation of two or more groups T2, or iii) a condensed ring group formed by the condensation of one or more groups T2 and one or more groups T1 (e.g., pyrrole group, thiophene group, furan group, indole group, benzodole group, naphthoyndole group, isodole group, benzisoindole group, naphthoyisoindole group, benzocillol group, benzothiophene group, benzofuran group, carbazole group, dibenzocillol group, dibenzothiophene group, dibenzofuran group, indenocarbazole group, indolocarbazole group, benzofurocarbazole group, benzothienocarbazole group, benzocillolocarbazole group, benzodolocarbazole group, benzoindolocarbazole group, benzocarbazole group, benzonaphthofuran group, benzonaphthiophene group, Benzonaphthosilol group, benzofurodibenzofuran group, benzofurodibenzothiophen group, benzothienodibenzothiophen group, pyrazole group, imidazole group, triazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiaazole group, thiadiazole group, benzopyrazole group, benzimidazole group, benzoxazole group, benzisoxazole group, benzothiaazole group, benzisothiazole group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, benzoquinoline group, benzisoquinoline group, quinoxaline group, benzoquinoxaline group, quinazolin group, benzoquinazolin group, phenanthroline group, sinoline group, phthalazine group, It may be the naftiridine group, imidazopyridine group, imidazopyrimidine group, imidazotriazine group, imidazopyrazine group, imidazopyridazine group, azacarbazole group, azafluoren group, azadibenzocilol group, azadibenzothiophen group, azadibenzofuran group, etc.),

[0639] The above π electron-excess C3-C 60A cyclic group is i) group T1, ii) a condensed ring group formed by condensing two or more groups T1 together, iii) group T3, iv) a condensed ring group formed by condensing two or more groups T3 together, or v) a condensed ring group formed by condensing one or more groups T3 and one or more groups T1 together (e.g., the above C3-C 60 Carbocyclic group, 1H-pyrrole group, Silol group, Borole group, 2H-pyrrole group, 3H-pyrrole group, Thiophene group, Furan group, Indole group, Benzoindole group, Naphthoyindole group, Isoindole group, Benzoisoindole group, Naphthoyisoindole group, Benzocilol group, Benzothiophene group, Benzofuran group, Carbazole group, Dibenzocilol group, Dibenzothiophene group, Dibenzofuran group, Indenocarbazole group, Indolocarbazole group, Benzofurocarbazole group, Benzothienocarbazole group, Benzocilolocarbazole group, Benzoindolocarbazole group, Benzocarbazole group, Benzonaphthofuran group, Benzonaphthothiophene group, Benzonaphtholilol group, Benzofurodibenzofuran group, It may be the benzopurodibenzothiophen group, benzothienodibenzothiophen group, etc.,

[0640] The above π electron-deficient nitrogen-containing C1-C 60A cyclic group is i) group T4, ii) a condensed ring group formed by the condensation of two or more groups T4, iii) a condensed ring group formed by the condensation of one or more groups T4 and one or more groups T1, iv) a condensed ring group formed by the condensation of one or more groups T4 and one or more groups T3, or v) a condensed ring group formed by the condensation of one or more groups T4, one or more groups T1, and one or more groups T3 (e.g., pyrazole group, imidazole group, triazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiaazole group, thiadiazole group, benzopyrazole group, benzimidazole group, benzoxazole group, benzisoxazole group, benzothiaazole group, benzisothiazole group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, It may be the isoquinoline group, benzoquinoline group, benzisoquinoline group, quinoxaline group, benzoquinoxaline group, quinazolin group, benzoquinazolin group, phenanthroline group, sinoline group, phthalazine group, naftiridine group, imidazopyridine group, imidazopyrimidine group, imidazotriazine group, imidazopyrazine group, imidazopyridazine group, azacarbazole group, azafluoren group, azadibenzocilol group, azadibenzothiophen group, azadibenzofuran group, etc.),

[0641] The above group T1 is a cyclopropane group, a cyclobutane group, a cyclopentane group, a cyclohexane group, a cycloheptane group, a cyclooctane group, a cyclobutene group, a cyclopentene group, a cyclopentadiene group, a cyclohexene group, a cyclohexadiene group, a cycloheptene group, an adamantane group, norbornane (or, bicyclo[2.2.1]heptane)) group, norbornene group, a bicyclo[1.1.1]pentane group, a bicyclo[2.1.1]hexane group, a bicyclo[2.1.1]octane group, or a benzene group, and

[0642] The above group T2 is a furan group, a thiophene group, a 1H-pyrrole group, a silol group, a borole group, a 2H-pyrrole group, a 3H-pyrrole group, an imidazole group, a pyrazol group, a triazole group, a tetrazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiaazole group, a thiadiazole group, azasilol group, azaborol group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a tetrazine group, a pyrrolidine group, an imidazolidine group, a dihydropyrrole group, a piperidine group, a tetrahydropyridine group, a dihydropyridine group, a hexahydropyrimidine group, a tetrahydropyrimidine group, a dihydropyrimidine group, a piperazine group, a tetrahydropyrazine group, It is a dihydropyrazine group, a tetrahydropyridazine group, or a dihydropyridazine group, and

[0643] The above group T3 is a furan group, a thiophene group, an 1H-pyrrole group, a silol group, or a borole group, and

[0644] The above group T4 may be a 2H-pyrrole group, a 3H-pyrrole group, an imidazole group, a pyrazol group, a triazole group, a tetrazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiaazole group, a thiadiazole group, an azacilol group, an azaborol group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, or a tetrazine group.

[0645] In this specification, the cyclic group, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, π electron-excess C3-C 60 Cyclic group or π electron-deficient nitrogenous C1-C 60 The term "cyclic group" may be a group condensed to any cyclic group, a monovalent group, or a polyvalent group (e.g., a divalent group, a trivalent group, a tetravalent group, etc.) depending on the structure of the chemical formula in which the term is used. For example, "benzene group" may be a benzo group, a phenyl group, a phenylene group, etc., which can be easily understood by a person skilled in the art depending on the structure of the chemical formula containing the "benzene group."

[0646] For example, 1 valence C3-C 60 Carbocyclic group and 1 valence C1-C 60 An example of a heterocyclic group is C3-C 10 Cycloalkyl group, C1-C 10 Heterocycloalkyl group, C3-C 10 Cycloalkenyl group, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C1-C 60 It may include a heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic heterocondensed polycyclic group, and a divalent C3-C 60 Carbocyclic group and 1 valence C1-C 60 An example of a heterocyclic group is C3-C 10 Cycloalkylene group, C1-C 10Heterocycloalkylene group, C3-C 10 Cycloalkenylene group, C1-C 10 Heterocycloalkenylene group, C6-C 60 Aryllene group, C1-C 60 It may include a heteroarylene group, a divalent non-aromatic condensed polycyclic group, and a divalent non-aromatic heterocondensed polycyclic group.

[0647] C1-C in this specification 60 The alkyl group refers to a linear or branched aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, and specific examples thereof include a methyl group, an ethyl group, n -Propyl group, isopropyl group, n -butyl group, sec -butyl group, isobutyl group, tert -butyl group, n -Pentyl, tert -Pentyl group, neopentyl group, isopentyl group, sec -pentyl group, 3-pentyl group, sec -Isopentyl group, n - Hexyl group, isohexyl group, sec -hexyl group, tert -hexyl group, n - heptyl group, isoheptyl group, sec -Heptyl group, tert -Heptyl group, n -Octyl group, iso-octyl group, sec -Octyl group, tert -Octyl group, n -Nonilgi, Isononilgi, sec -Playing, tert -Playing, n - Decyl group, isodecyl group, sec -Desil, tert - Includes decyl groups, etc. C1-C in this specification. 60 The alkylene group is the C1-C 60 It refers to a divalent group having the same structure as an alkyl group.

[0648] C2-C in this specification 60 The alkenyl group is C2-C 60It refers to a monovalent hydrocarbon group comprising one or more carbon-carbon double bonds at the middle or terminal of an alkyl group, and specific examples thereof include an ethenyl group, a propenyl group, a butenyl group, etc. In this specification, C2-C 60 The alkenylene group is the above C2-C 60 It refers to a divalent group having the same structure as an alkenyl group.

[0649] C2-C in this specification 60 The alkynyl group is C2-C 60 It refers to a monovalent hydrocarbon group comprising one or more carbon-carbon triple bonds at the middle or terminal of an alkyl group, and specific examples thereof include ethinyl groups, propynyl groups, etc. In this specification, C2-C 60 The alkynylene group is the above C2-C 60 It refers to a divalent group having the same structure as an alkynyl group.

[0650] C1-C in this specification 60 The alkoxy group is -OA 101 (Here, A 101 The above C1-C 60 It refers to a monovalent group having the chemical formula of an alkyl group, and specific examples thereof include a methoxy group, an ethoxy group, an isopropyloxy group, etc.

[0651] C3-C in this specification 10 A cycloalkyl group refers to a monovalent saturated hydrocarbon cyclic group having 3 to 10 carbon atoms, and specific examples thereof include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, norbornanyl group (or, a bicyclo[2.2.1]heptyl group), a bicyclo[1.1.1]pentyl group, a bicyclo[2.1.1]hexyl group, a bicyclo[2.1.1]octyl group, etc. In this specification, C3-C 10 The cycloalkylene group is the C3-C above. 10It refers to a divalent group having the same structure as a cycloalkyl group.

[0652] C1-C in this specification 10 A heterocycloalkyl group refers to a monovalent cyclic group having 1 to 10 carbon atoms, comprising at least one heteroatom as a ring-forming atom in addition to a carbon atom, and specific examples thereof include a 1,2,3,4-oxatriazolidinyl group, a tetrahydrofuranyl group, a tetrahydrothiophenyl group, etc. In this specification, C1-C 10 The heterocycloalkylene group is the C1-C 10 It refers to a divalent group having the same structure as a heterocycloalkyl group.

[0653] C3-C in this specification 10 A cycloalkenyl group refers to a monovalent cyclic group having 3 to 10 carbon atoms, having at least one carbon-carbon double bond within the ring, but not having aromaticity; specific examples thereof include cyclopentenyl groups, cyclohexenyl groups, cycloheptenyl groups, etc. In this specification, C3-C 10 The cycloalkenylene group is the above C3-C 10 It refers to a divalent group having the same structure as a cycloalkenyl group.

[0654] C1-C in this specification 10 The heterocycloalkenyl group is a monovalent cyclic group having 1 to 10 carbon atoms, comprising, in addition to the carbon atom, at least one heteroatom as a ring-forming atom, and has at least one double bond within the ring. The C1-C 10 Specific examples of heterocycloalkenyl groups include 4,5-dihydro-1,2,3,4-oxatriazoleyl groups, 2,3-dihydrofuranyl groups, 2,3-dihydrothiophenyl groups, etc. In this specification, C1-C 10 The heterocycloalkenylene group is the above C1-C 10It refers to a divalent group having the same structure as a heterocycloalkenyl group.

[0655] C6-C in this specification 60 An aryl group refers to a monovalent group having a carbocyclic aromatic system with 6 to 60 carbon atoms, and C6-C 60 An arylene group refers to a divalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms. The above C6-C 60 Specific examples of aryl groups include phenyl group, pentalenyl group, naphthyl group, azulenyl group, indacenyl group, acenaphthyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, chrysenyl group, perylenyl group, pentaphenyl group, Includes hepthalenyl group, naphthacenyl group, fisenyl group, hexacenyl group, penthacenyl group, rubisenyl group, coronenyl group, ovalenyl group, etc. The above C6-C 60 Aryl group and C6-C 60 If the arylene group contains two or more rings, the two or more rings can be condensed together.

[0656] C1-C in this specification 60 A heteroaryl group refers to a monovalent group having a heterocyclic aromatic system having 1 to 60 carbon atoms, comprising at least one heteroatom as a ring-forming atom in addition to a carbon atom, and C1-C 60 A heteroarylene group refers to a divalent group having a heterocyclic aromatic system having 1 to 60 carbon atoms, which additionally includes at least one heteroatom as a ring-forming atom in addition to the carbon atoms. 60 Specific examples of heteroaryl groups include pyridinyl groups, pyrimidinyl groups, pyrazinyl groups, pyridazinyl groups, triazinyl groups, quinolinyl groups, benzoquinolinyl groups, isoquinolinyl groups, benzisoquinolinyl groups, quinoxalinyl groups, benzoquinoxalinyl groups, quinazolinyl groups, benzoquinazolinyl groups, cinolinyl groups, phenanthrolinyl groups, phthalazinyl groups, naphthalidinyl groups, etc. The above C1-C60 heteroaryl group and C1-C 60 When a heteroarylene group contains two or more rings, the two or more rings can be condensed together.

[0657] In this specification, a monovalent non-aromatic condensed polycyclic group refers to a monovalent group (e.g., having 8 to 60 carbon atoms) in which two or more rings are condensed together, and the entire molecule contains only carbon as a ring-forming atom and has non-aromaticity. Specific examples of the monovalent non-aromatic condensed polycyclic group include indenyl groups, fluorenyl groups, spiro-bifluorenyl groups, benzofluorenyl groups, indenopenantrenyl groups, indenoanthracenyl groups, etc. In this specification, a divalent non-aromatic condensed polycyclic group refers to a divalent group having the same structure as the monovalent non-aromatic condensed polycyclic group.

[0658] In this specification, a monovalent non-aromatic condensed heteropolycyclic group means a monovalent group (e.g., having 1 to 60 carbon atoms) in which two or more rings are condensed together, and in addition to carbon atoms as ring-forming atoms, at least one heteroatom is included, and the entire molecule is non-aromatic. Specific examples of the above monovalent non-aromatic heterocondensed polycyclic group include: a pyrrole group, a thiophenyl group, a furanyl group, an indole group, a benzoindole group, a naphthoindole group, an isoindole group, a benzoisoindole group, a naphthoisoindole group, a benzocylol group, a benzothiophenyl group, a benzofuranyl group, a carbazole group, a dibenzocylol group, a dibenzothiophenyl group, a dibenzofuranyl group, azacarbazole group, azafluorenyl group, azadibenzocylol group, azadibenzothiophenyl group, azadibenzofuranyl group, a pyrazol group, an imidazole group, a triazole group, a tetrazole group, an oxazole group, an isooxazole group, a thiazole group, an isothiazole group, an oxadiazole group, a thiadiazole group, a thiadiazole group, Includes benzopyrazol group, benzimidazole group, benzoxazole group, benzothiazole group, benzoxadiazole group, benzothiadiazole group, imidazopyridinyl group, imidazopyrimidinyl group, imidazotriazinyl group, imidazopyrazinyl group, imidazopyridazinyl group, indenocarbazole group, indolocarbazole group, benzofurocarbazole group, benzothienocarbazole group, benzosilolocarbazole group, benzindolocarbazole group, benzocarbazole group, benzonaphthofuranyl group, benzonaphthothiophenyl group, benzonaphthosilol group, benzofurodibenzofuranyl group, benzofurodibenzothiophenyl group, benzothienodibenzothiophenyl group, etc. In this specification, a divalent non-aromatic heterocondensed polycyclic group refers to a divalent group having the same structure as the monovalent non-aromatic heterocondensed polycyclic group.

[0659] C6-C in this specification 60 The aryloxy group is -OA 102 (Here, A 102 is the above C6-C 60 Pointing to arylgime), and the above C6-C 60arylthio is -SA 103 (Here, A 103 The above C6-C 60 It refers to Arilgiim).

[0660] C7-C in this specification 60 The arylalkyl group is -A 104 A 105 (Here, A 104 is C1-C 54 It is an alkylene group, and A 105 is C6-C 59 Referring to arylgiim), and C2-C in this specification 60 The heteroarylalkyl group is -A 106 A 107 (Here, A 106 C1-C 59 It is an alkylene group, and A 107 C1-C 59 It refers to a heteroaryl group.

[0661] "R" in this specification 10a "Is,

[0662] Deuterium (-D), -F, -Cl, -Br, -I, hydroxyl group, cyano group, or nitro group;

[0663] Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 aryloxy group, C6-C 60 Arylthio group, C7-C 60 Arylalkyl group, C2-C 60 Heteroarylalkyl group, -Si(Q 11 )(Q 12 )(Q 13 ), -N(Q 11 )(Q 12 ), -B(Q 11 )(Q 12 ), -C(=O)(Q 11 ), -S(=O)2(Q 11 ), -P(=O)(Q 11 )(Q 12), or substituted or unsubstituted with any combination thereof, C1-C 60 Alkyl group, C2-C 60 alkenyl group, C2-C 60 alkynyl group, or C1-C 60 Alkoxygenation;

[0664] Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1-C 60 Alkyl group, C2-C 60 alkenyl group, C2-C 60 alkynyl group, C1-C 60 Alkoxy group, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 aryloxy group, C6-C 60 Arylthio group, C7-C 60 Arylalkyl group, C2-C 60 Heteroarylalkyl group, -Si(Q 21 )(Q 22 )(Q 23 ), -N(Q 21 )(Q 22 ), -B(Q 21 )(Q 22 ), -C(=O)(Q 21 ), -S(=O)2(Q 21 ), -P(=O)(Q 21 )(Q 22 ), or substituted or unsubstituted with any combination thereof, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 aryloxy group, C6-C 60 Arylthio group, C7-C 60 Arylalkyl group, or C2-C 60 heteroarylalkyl group,; or

[0665] -Si(Q 31 )(Q 32 )(Q 33 ), -N(Q 31 )(Q 32 ), -B(Q 31 )(Q 32 ), -C(=O)(Q31 ), -S(=O)2(Q 31 ), or -P(=O)(Q 31 )(Q 32 );

[0666] It could be.

[0667] Q1 to Q3, Q in this specification 11 to Q 13 , Q 21 to Q 23 and Q 31 to Q 33 They are independently hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl group; cyano group; nitro group; C1-C 60 Alkyl group; C2-C 60 Alkenyl group; C2-C 60 alkynyl group; C1-C 60 Alkoxy group; or deuterium, -F, cyano group, C1-C 60 Alkyl group, C1-C 60 C3-C substituted or unsubstituted with an alkoxy group, a phenyl group, a biphenyl group, or any combination thereof 60 Carbocyclic group, C1-C 60 Heterocyclic group; C7-C 60 Arylalkyl group; or C2-C 60 It may be a heteroarylalkyl group.

[0668] In this specification, a heteroatom refers to any atom other than a carbon atom. Examples of such heteroatoms include O, S, N, P, Si, B, Ge, Se, or any combination thereof.

[0669] In this specification, "Ph" means a phenyl group, "Me" means a methyl group, "Et" means an ethyl group, and "tert-Bu" or "Bu t " represents the tert-butyl group, and "OMe" represents the methoxy group.

[0670] In this specification, "biphenyl group" means "phenyl group substituted with a phenyl group." The "biphenyl group" is a substituent of "C6-C 60It belongs to the "substituted phenyl group" which is an "aryl group".

[0671] In this specification, "terphenyl group" means "phenyl group substituted with a biphenyl group." The "terphenyl group" is a substituent of "C6-C 60 C6-C substituted with aryl groups 60 It belongs to the "substituted phenyl group" which is an "aryl group".

[0672] In this specification, * and *' refer to bonding sites with neighboring atoms in the corresponding chemical formula or moiety, unless otherwise defined.

[0673] Hereinafter, a light-emitting element according to one embodiment of the present invention will be described in more detail with reference to examples.

[0674] [Example]

[0675] Evaluation Example 1

[0676] According to the method described in Table 1 below, for each of the compounds listed in Table 2 below, the emission spectrum, emission peak wavelength, absorption spectrum, and absorption peak wavelength were evaluated, and the results are listed in Table 2. Refer to FIG. 4a for the emission spectra of compounds D1-1 and D2-1 ("D1-1", "D2-1") and the absorption spectrum of compound D2-1 ("D2-1(Abs)"). Refer to FIG. 4b for the emission spectra of compounds D1-1 and D2-3 ("D1-1", "D2-3") and the absorption spectrum of compound D2-3 ("D2-3(Abs)").

[0677] emission spectrum A 10 μmol / L toluene solution of the compound to be measured was prepared and placed in a quartz cell, and the emission spectrum of the solution (vertical axis: emission intensity / horizontal axis: wavelength (nm)) was measured at room temperature (300 K) using a Streak Camera (manufactured by Hamamatsu) and a ps LASER (EKSPLA). emission peak wavelength (nm) The maximum emission wavelength of the peak where the emission intensity is maximum among the above emission spectra was evaluated as the emission peak wavelength. absorption spectrum A 10 μmol / L toluene solution of the compound to be measured was prepared and placed in a quartz cell, and the absorption spectrum of the solution (vertical axis: absorption intensity / horizontal axis: wavelength (nm)) was measured at room temperature (300 K) using a Streak Camera (manufactured by Hamamatsu) and a ps LASER (EKSPLA). Absorption peak wavelength (nm) The maximum absorption wavelength of the peak where the absorption intensity is maximum among the above absorption spectra was evaluated as the absorption peak wavelength.

[0678] compound emission peak wavelength (nm) Absorption peak wavelength (nm) D1-1 460 - D1-2 459 - D1-3 458 - A 454 - D2-1 457 445 D2-2 457 446 D2-3 456 445 B 461 450 C 451 440 D 456 444 E 450 438 F 450 435 G 470 - H 467 -

[0679]

[0680]

[0681]

[0682] Evaluation Example 2

[0683] Spectral overlap integral values ​​for each of the emission spectrum and absorption spectrum of the compounds listed in Table 3 below were calculated using an Excel program according to <Equation 2> described in this specification and listed in Table 3.

[0684] Compound used when measuring emission spectrum Compounds used when measuring absorption spectrum The integral value of the spectral overlap between the emission spectrum and the absorption spectrum (M -1 cm -1 nm 4 ) D1-1 D2-1 0.91 x 10 14 D1-2 D2-1 1.2 x 10 14 D1-3 D2-1 2.7 x 10 14 A D2-1 1.47 x 10 15 D1-1 B 1.29 x 10 15 A B 3.72 x 10 15 C D 6.99 x 10 14 E F 1.51 x 10 15 G H 2.79 x 10 15

[0685] Evaluation Example 3

[0686] For the thin films formed by depositing each compound listed in Table 4 below as a thin film with a thickness of 300 Å, the low temperature (4K) emission spectrum and the room temperature (300K) emission spectrum were measured using the spectrophotometer used for the emission spectrum evaluation in Table 1, respectively. Then, 1) the lowest excitation triplet (T1) energy level was evaluated by analyzing the peaks observed only in the low temperature emission spectrum compared with the room temperature emission spectrum, and 2) the lowest excitation singlet (S1) energy level was evaluated by converting the maximum emission wavelength (nm) of the peak where the emission intensity of the room temperature emission spectrum is maximum into eV units. The results were summarized in Table 4.

[0687] compound T1(eV) S1(eV) D1-1 2.695239 - D1-2 2.701111 - D1-3 2.707009 - A 2.730859 - D2-1 - 2.712932 D2-2 - 2.712932 D2-3 - 2.718882 B - 2.689393 C 2.684139 2.749024 D 2.567715 2.718882 E 2.348886 2.755133 F 2.69 2.755133 G 2.594755 2.637894 H 2.548390 2.654839

[0688] Example 1

[0689] Corning 15 Ω / cm 2 A (1200Å) ITO glass substrate (anode) was cut into pieces measuring 50mm x 50mm x 0.7mm, ultrasonically cleaned with isopropyl alcohol and pure water for 5 minutes each, then cleaned by irradiating with ultraviolet light and exposing to ozone for 30 minutes, and then installed in a vacuum deposition apparatus.

[0690] After forming a hole injection layer with a thickness of 600 Å by vacuum depositing 2-TNATA on the glass substrate, a hole transport layer with a thickness of 300 Å was formed by vacuum depositing HAT-CN on the hole injection layer.

[0691] A first host (HT-21), a second host (ET-2), a first dopant, and a second dopant were co-deposited on the above hole transport layer in a weight ratio of 58:25:15:2 to form a 300 Å thick light-emitting layer. Refer to Table 5 for the first dopant and the second dopant, respectively.

[0692] Next, an organic light-emitting device was manufactured by vacuum depositing ET1 on the light-emitting layer to form an electron transport layer with a thickness of 300 Å, vacuum depositing Yb on the electron transport layer to form an electron injection layer with a thickness of 10 Å, and then vacuum depositing Al on the electron injection layer to form a second electrode (cathode) with a thickness of 3000 Å.

[0693]

[0694] Examples 2 to 3 and Comparative Examples 1 to 3

[0695] An organic light-emitting diode was fabricated in the same manner as in Example 1, except that the compounds listed in Table 5 below were used as the first and second dopants, respectively.

[0696] Comparative Example 4

[0697] An organic light-emitting diode was fabricated in the same manner as in Example 1, except that NCNPC (3-(N-carbazolyl)-N-phenylcarbazole) and DCPBN (3',5'-di-(N-carbazolyl)-[1,1'-biphenyl]-2-carbonitrile) were used as the first host and second host, respectively, and the compounds listed in Table 5 below were used as the first dopant and second dopant, respectively.

[0698] Comparative Example 5

[0699] An organic light-emitting diode was fabricated in the same manner as in Example 1, except that mCBP was used as a single host instead of the first and second hosts, and the compounds listed in Table 5 below were used as the first and second dopants, respectively.

[0700] Comparative Example 6

[0701] An organic light-emitting diode was fabricated in the same manner as in Example 1, except that oCBP and mCBP-CN were used as the first host and second host, respectively, and the compounds listed in Table 5 below were used as the first dopant and second dopant, respectively.

[0702] Evaluation Example 4

[0703] For the organic light-emitting diodes fabricated in Examples 1 to 3 and Comparative Example A above, a current density of 10 mA / cm² 2 Driving voltage, external quantum efficiency (EQE), and lifetime (LT 50 ) and color coordinates were measured using the following method, and the results are shown in Table 5:

[0704] - Color coordinates: Power was supplied from a current-voltage meter (Keithley SMU 236), and measurements were taken using a PR650 luminance meter.

[0705] - Luminance: Power was supplied from a current-voltage meter (Keithley SMU 236), and measured using a luminance meter PR650.

[0706] - Efficiency: Power was supplied from a current-voltage meter (Keithley SMU 236), and measured using a luminance meter PR650.

[0707] Lifespan (LT) 50 ) represents the time it takes to reach 50% of the initial brightness compared to 100%.

[0708] light-emitting layer Driving voltage (V) External Quantum Efficiency (%) LT 50 (hour) Color coordinates 1st dopant Second dopant CIEx CIEy Example 1 D1-1 D2-1 4.3 21.8 5500 0.132 0.155 Example 2 D1-2 D2-1 4.4 22.2 6000 0.133 0.144 Example 3 D1-3 D2-1 4.3 23.5 6800 0.133 0.141 Comparative Example 1 A D2-1 4.7 23.1 2050 0.137 0.119 Comparative Example 2 D1-1 B 4.5 24.7 3900 0.136 0.124 Comparative Example 3 A B 4.5 25.8 1200 0.137 0.112 Comparative Example 4 C D 4.5 26.1 410 0.136 0.098 Comparative Example 5 E F 4.5 25.6 360 0.136 0.089 Comparative Example 6 G H 4.4 26.1 975 0.135 0.177

[0709] From Table 5 above, it can be confirmed that the light-emitting elements of Examples 1 to 3 emit blue light and have improved driving voltage and improved lifespan characteristics compared to the light-emitting element of Comparative Example 6. In addition, it can be seen that Comparative Examples 4 and 5 each do not contain a phosphorescent dopant.

[0710] Although the present invention has been described with reference to the above synthesis examples and embodiments, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims. Explanation of the symbols

[0711] 10: Light-emitting element 110: First electrode 130: Middle layer 150: Second electrode

Claims

Claim 1 A first electrode; a second electrode facing the first electrode; and an intermediate layer disposed between the first electrode and the second electrode and including a light-emitting layer; wherein the light-emitting layer comprises a first host, a second host, a first dopant, and a second dopant, wherein the first host is a hole-transporting compound, the second host is an electron-transporting compound, the first dopant is a phosphorescent dopant, and the second dopant is a delayed fluorescence dopant, wherein the first host, the second host, the first dopant, and the second dopant are each different from one another, and satisfy the following <Equation 1>, and the spectral overlap integral of the emission spectrum of the first dopant and the absorption spectrum of the second dopant is 0.5 x 10⁻⁶ 14 M -1 cm -1 nm 4 Above and 5.0 x 10 14 M -1 cm -1 nm 4 The above spectrum overlap integral value is evaluated by the following <Equation 2>, a light-emitting element: <Equation 1> T1(D1) ≤ S1(D2) wherein in Equation 1, T1(D1) is the lowest excited triplet energy level of the first dopant, and S1(D2) is the lowest excited singlet energy level of the second dopant, T1(D1) is a value obtained by analyzing the peak observed only in the low-temperature emission spectrum by comparing it with the room-temperature emission spectrum after measuring the low-temperature (4K) emission spectrum and the room-temperature (300K) emission spectrum of the first dopant, respectively, and S1(D2) is a value obtained by converting the maximum emission wavelength (nm) of the peak where the emission intensity of the room-temperature emission spectrum is maximum after measuring the room-temperature (300K) emission spectrum of the second dopant, and <Equation 2> In the above Equation 2, J(λ) is M -1 cm -1 nm 4 in units of M -1 cm -1 nm 4 ), which is the spectral overlap integral of the emission spectrum of the first dopant and the absorption spectrum of the second dopant, and ε(λ) is M -1 cm -1 It is the molar extinction coefficient of the second dopant calculated from the absorption spectrum of the second dopant, in units of nm, and λ is the wavelength of the emission spectrum and the absorption spectrum in units of nm. F D (λ) is the wavelength-dependent emission spectrum of the first dopant normalized to an area of ​​1, the emission spectrum of the first dopant is the emission spectrum evaluated at room temperature for a 10 μM toluene solution of the first dopant, and the absorption spectrum of the second dopant is the absorption spectrum evaluated at room temperature for a 10 μM toluene solution of the second dopant. Claim 2 A light-emitting device according to claim 1, wherein the emission peak wavelengths in the emission spectra of the first dopant and the second dopant are independently 440 nm or more and 470 nm or less. Claim 3 A light-emitting device according to claim 1, wherein the emission peak wavelength in the emission spectrum of the first dopant is the same as or longer than the emission peak wavelength of the emission spectrum of the second dopant. Claim 4 A light-emitting device according to claim 1, wherein an exciton is transitioned from the lowest excited triplet energy level (T1) of the first dopant to the lowest excited singlet energy level (S1) of the second dopant, and an exciton at the lowest excited singlet energy level (S1) of the second dopant is transitioned to a ground state and emits light. Claim 5 A light-emitting device according to claim 1, wherein the ratio of the light-emitting component emitted from the second dopant to the total light-emitting component emitted from the light-emitting layer is 30% or more. Claim 6 A light-emitting element according to claim 1, wherein the light-emitting layer emits blue light having CIEx color coordinates of 0.115 or higher and 0.140 or lower and CIEy color coordinates of 0.135 or higher and 0.160 or lower. Claim 7 A light-emitting element according to claim 1, wherein the sum of the content of the first dopant and the content of the second dopant is smaller than the sum of the content of the first host and the content of the second host. Claim 8 A light-emitting element according to claim 1, wherein the sum of the content of the first dopant and the content of the second dopant is 0.1 parts by weight or more and 30 parts by weight or less per 100 parts by weight of the light-emitting layer. Claim 9 In claim 1, the above <Equation 1> is a light-emitting element represented by the following <Equation 1-1>: <Equation 1-1>T1(D1) < S1(D2). The description of T1(D1) and S1(D2) in the above <Equation 1-1> refers to what is written in <Equation 1>. Claim 10 delete Claim 11 A light-emitting device according to claim 1, wherein the hole-transporting compound is a compound that does not contain an electron-transporting moiety, and the electron-transporting compound is a compound that contains at least one electron-transporting moiety. Claim 12 A light-emitting element according to claim 1, wherein the first host is a compound represented by the following chemical formula 1 and the second host is a compound represented by the following chemical formula 2: <Chemical Formula 1> <Chemical Formula 2> In the above chemical formulas 1 and 2, X1 is O, S, N(R3) or C(R3)(R4), X2 is a single bond, O, S, N(R5) or C(R5)(R6), and ring A1 and ring A2 are independently C3-C 60 Carbocyclic group or C1-C 60 It is a heterocyclic group, and R1 to R6 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, at least one R 10a C1-C substituted or unsubstituted 60 alkyl group, at least one R 10a C2-C substituted or unsubstituted 60 alkenyl group, at least one R 10a C2-C substituted or unsubstituted 60 alkynyl group, at least one R 10a C1-C substituted or unsubstituted 60 Alkoxy group, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, at least one R 10a C1-C substituted or unsubstituted 60 Heterocyclic group, at least one R 10a C6-C substituted or unsubstituted 60 aryloxy group, at least one R 10a C6-C substituted or unsubstituted 60 Arylthio group, -Si(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2) or -P(=S)(Q1)(Q2), and a1 and a2 are independently 1, 2, 3, 4, 5 or 6, and X 31 is N or C(R 31 ) and; X 32 is N or C(R 32 ) and; X 33 is N or C(R 33 ) and; X 34 is N or C(R 34 ) and; X 35 is N or C(R 35 ) and; X 36 is N or C(R 36 ) but, X 31 To X 36 At least one of them is N and R 31 to R 36 Independently, hydrogen, deuterium, and at least one R 10a C1-C substituted or unsubstituted 60 alkyl group, at least one R 10a C3-C substituted or unsubstituted 60 Carbocyclic group, or at least one R 10a C1-C substituted or unsubstituted 60 It is a heterocyclic group, and the above R 10a is, deuterium (-D), -F, -Cl, -Br, -I, hydroxyl group, cyano group, or nitro group; deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 aryloxy group, C6-C 60 Arylthio group, -Si(Q 11 )(Q 12 )(Q 13 ), -N(Q 11 )(Q 12 ), -B(Q 11 )(Q 12 ), -C(=O)(Q 11 ), -S(=O)2(Q 11 ), -P(=O)(Q 11 )(Q 12 ), or substituted or unsubstituted with any combination thereof, C1-C 60 Alkyl group, C2-C 60 alkenyl group, C2-C 60 alkynyl group, or C1-C 60 Alkoxy group; deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1-C 60 Alkyl group, C2-C 60 alkenyl group, C2-C 60 alkynyl group, C1-C 60 Alkoxy group, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 aryloxy group, C6-C 60 Arylthio group, -Si(Q 21 )(Q 22 )(Q 23 ), -N(Q 21 )(Q 22 ), -B(Q 21 )(Q 22 ), -C(=O)(Q 21 ), -S(=O)2(Q 21 ), -P(=O)(Q 21 )(Q 22 ), or substituted or unsubstituted with any combination thereof, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 aryloxy group, or C6-C 60 Arylthio group; or-Si(Q 31 )(Q 32 )(Q 33 ), -N(Q 31 )(Q 32 ), -B(Q 31 )(Q 32 ), -C(=O)(Q 31 ), -S(=O)2(Q 31 ), or -P(=O)(Q 31 )(Q 32 ); and, above Q1 to Q3, Q 11 to Q 13 , Q 21 to Q 23 and Q 31 to Q 33 They are independently hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl group; cyano group; nitro group; C1-C 60 Alkyl group; C2-C 60 Alkenyl group; C2-C 60 alkynyl group; C1-C 60 Alkoxy group; or deuterium, -F, cyano group, C1-C 60 Alkyl group, C1-C 60 C3-C substituted or unsubstituted with an alkoxy group, a phenyl group, a biphenyl group, or any combination thereof 60 Carbocyclic group or C1-C 60 It is a heterocyclic group. Claim 13 A light-emitting device according to claim 1, wherein the first dopant is a transition metal-containing organometallic compound. Claim 14 A light-emitting device according to claim 1, wherein the first dopant is an organometallic compound comprising platinum and a tetradentate ligand. Claim 15 In claim 1, the second dopant is a light-emitting element that does not contain a transition metal. Claim 16 A light-emitting device according to claim 1, wherein the second dopant comprises a condensed ring in which at least one first ring and at least one second ring are condensed together, the first ring is a six-membered ring including B (boron) as a ring-forming atom, and the second ring is a pyrrole group, a furan group, a thiophene group, a benzene group, a pyridine group, a pyrimidine group, or a piperidine group. Claim 17 A light-emitting element according to claim 16, wherein the second dopant further comprises a tert-butyl group, a biphenyl group, a terphenyl group, a carbazole group, or any combination thereof. Claim 18 An electronic device comprising a light-emitting element according to any one of claims 1 through 9 and claims 11 through 17. Claim 19 An electronic device according to claim 18, further comprising a thin-film transistor; wherein the thin-film transistor comprises a source electrode and a drain electrode, and the first electrode of the light-emitting element is electrically connected to the source electrode or the drain electrode of the thin-film transistor. Claim 20 An electronic device according to claim 18, further comprising a color filter, a color conversion layer, a touchscreen layer, a polarizing layer, or any combination thereof.

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