Light emitting device and electronic device including the same

Abstract

This application relates to a light-emitting device comprising a first electrode, a second electrode facing the first electrode, a first emitting layer between the first electrode and the second electrode, and a second emitting layer between the first emitting layer and the second electrode. The first emitting layer comprises a first compound and a second compound, and the second emitting layer comprises a third compound and a fourth compound, wherein the first compound and the second compound are different from each other, and the third compound and the fourth compound are different from each other. The fourth compound comprises at least one of an electron transport compound and a bipolar compound. An electronic device including the light-emitting device is also provided.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2020-0099242, filed with the Korean Intellectual Property Office on August 7, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to light-emitting devices and electronic devices including said light-emitting devices. Background Technology

[0004] Organic light-emitting devices (OLEDs) are self-emitting devices that, compared to conventional devices, offer wide viewing angles, high contrast, short response times, and superior characteristics in terms of brightness, driving voltage, response speed, and the ability to produce full-color images.

[0005] An OLED may include a first electrode disposed on a substrate, and a hole transport region, an emitter layer, an electron transport region, and a second electrode sequentially stacked on the first electrode. Holes supplied by the first electrode can move towards the emitter layer through the hole transport region, and electrons supplied by the second electrode can move towards the emitter layer through the electron transport region. Charge carriers such as holes and electrons recombine in the emitter layer to generate excitons. These excitons transition from an excited state to a ground state, thereby generating light. Summary of the Invention

[0006] This disclosure relates to light-emitting devices and electronic devices including said light-emitting devices.

[0007] Other aspects will be set forth in part in the description which follows and will be apparent in part from the description, or may be learned by practice of embodiments of this disclosure.

[0008] This disclosure provides a light-emitting device, which includes: a first electrode,

[0009] The second electrode facing the first electrode, and

[0010] An intermediate layer is disposed between the first electrode and the second electrode, wherein

[0011] The intermediate layer may include a first emitter layer and a second emitter layer disposed between the first emitter layer and the second electrode.

[0012] The first emitter layer may contain a first compound and a second compound.

[0013] The second emission layer may contain a third compound and a fourth compound.

[0014] The first compound and the second compound are different from each other.

[0015] The third compound and the fourth compound are different from each other.

[0016] The fourth compound may include at least one selected from electron transport compounds and bipolar compounds, and

[0017] The first compound comprises a first fluorescent compound, and the third compound comprises a second fluorescent compound satisfying Equation 1, or

[0018] The first compound includes the second fluorescent compound satisfying Equation 1, and the third compound includes the first fluorescent compound.

[0019] [Equation 1]

[0020] △E ST =S1-T1≤0.5eV.

[0021] In Equation 1, S1 is the lowest excited singlet state energy level (eV) of the second fluorescent compound, and T1 is the lowest excited triplet state energy level (eV) of the second fluorescent compound.

[0022] In one embodiment, the first electrode may be an anode, the second electrode may be a cathode, and the intermediate layer may further include a hole transport region disposed between the first electrode and the first emitter layer, and an electron transport region disposed between the second emitter layer and the second electrode.

[0023] In the implementation scheme, the hole transport region may include a hole injection layer, a hole transport layer, an emission assist layer, an electron blocking layer, or any combination thereof, and the electron transport region may include a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0024] In an implementation scheme, the second compound may include a hole transport compound.

[0025] In an implementation scheme, the second compound and the third compound may be different from each other, or the first compound and the fourth compound may be different from each other.

[0026] In the implementation scheme, the first emission layer can directly contact the second emission layer.

[0027] In the embodiments, each of the first compound and the third compound can emit light with a maximum emission wavelength of about 400 nm to about 600 nm.

[0028] In an embodiment, the electron transport compound may contain at least one electron-withdrawing group, and the bipolar compound may contain (i) at least one electron-withdrawing group and at least one electron-donating group, (ii) anthracene group and furan group, or (iii) at least one electron-withdrawing group, at least one electron-donating group, anthracene group and furan group. The hole transport compound may contain at least one electron-donating group.

[0029] In the implementation scheme, the electron-withdrawing group may be selected from:

[0030] -F, -CFH2, -CF2H, -CF3, -CN, and -NO2;

[0031] C1-C substituted by at least one of -F, -CFH2, -CF2H, -CF3, -CN and -NO2 60 alkyl groups; and

[0032] Unreplaced or by at least one R 10a Substituted C1-C nitrogen containing π-electron-deficient atoms 60 Cyclic groups, and

[0033] The electron-donating group may be selected from unsubstituted or substituted groups with at least one R group. 10a C3-C electron-rich cells with -N(Q1)(Q2) substitution and π-electron substitution 60 Cyclic groups,

[0034] R 10a It could be:

[0035] Deuterium (-D), -F, -Cl, -Br, -I, hydroxyl group, cyano group or nitro group;

[0036] Each of the following groups is unsubstituted or replaced: -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group, C6-C 60 aryl thioyl groups, -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 C1-C substituted by (or any combination thereof)60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group or C1-C 60 alkoxy group;

[0037] Each of the following groups is unsubstituted or replaced: -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1-C 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group, C1-C 60 alkoxy group, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group, C6-C 60 aryl thioyl groups, -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 C3-C replaced by any combination thereof 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group or C6-C 60 aryl thioyl group; or

[0038] -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 ),

[0039] Among them, Q1, Q2, Q 11 To Q 13 Q 21 To Q 23 And Q 31 To Q 33These can be, 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 groups; or each unsubstituted or deuterated, -F, cyano groups, C1-C 60 Alkyl groups, C1-C 60 C3-C substituted with alkoxy groups, phenyl groups, biphenyl groups, or any combination thereof 60 Carbocyclic groups or C1-C 60 Heterocyclic groups.

[0040] In this embodiment, the second fluorescent compound may not contain a carbazole group.

[0041] According to the implementation scheme, the light-emitting device may include a first electrode.

[0042] Facing the second electrode of the first electrode,

[0043] m light-emitting units stacked between the first electrode and the second electrode, and including an emission layer, and

[0044] An m-1 charge generation layer is disposed between two adjacent light-emitting units in the m light-emitting units.

[0045] Where m can be 2 or an integer greater than 2.

[0046] The emission layer may include a first emission layer and a second emission layer disposed between the first emission layer and the second electrode.

[0047] The first emitter layer may contain a first compound and a second compound.

[0048] The second emission layer may contain a third compound and a fourth compound.

[0049] The first compound and the second compound are different from each other.

[0050] The third compound and the fourth compound are different from each other.

[0051] The fourth compound may include at least one selected from electron transport compounds and bipolar compounds, and

[0052] The first compound comprises a first fluorescent compound, and the third compound comprises a second fluorescent compound satisfying Equation 1, or

[0053] The first compound includes the second fluorescent compound satisfying Equation 1, and the third compound includes the first fluorescent compound.

[0054] [Equation 1]

[0055] △E ST =S1-T1≤0.5eV.

[0056] In Equation 1, S1 is the lowest excited singlet state energy level (eV) of the second fluorescent compound, and T1 is the lowest excited triplet state energy level (eV) of the second fluorescent compound.

[0057] In an implementation, the maximum emission wavelength of light emitted from at least one of the light-emitting units may be different from the maximum emission wavelength of light emitted from at least one of the remaining light-emitting units.

[0058] In the implementation scheme, the light emitted from each of the m light-emitting units can have the same maximum emission wavelength.

[0059] In the embodiments, each of the first compound and the third compound can emit light with a maximum emission wavelength of about 400 nm to about 600 nm.

[0060] According to the implementation scheme, the electronic device includes the light-emitting device, and

[0061] Thin-film transistors, in which

[0062] The thin-film transistor includes a source electrode and a drain electrode, and

[0063] The first electrode of the light-emitting device is electrically connected to the source electrode or the drain electrode.

[0064] In the implementation scheme, the electronic device may further include a color filter, a color conversion layer, a touch screen layer, a polarization layer, or any combination thereof. Attached Figure Description

[0065] The above and other aspects, features and advantages of the embodiments of this disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0066] Figure 1 This is a schematic cross-sectional view of an embodiment of the light-emitting device;

[0067] Figure 2 It is a schematic cross-sectional view of an embodiment of the light-emitting device; and

[0068] Figure 3 This is a schematic cross-sectional view of an implementation scheme for the light-emitting device. Detailed Implementation

[0069] Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings, wherein the same reference numerals refer to the same elements throughout. In this respect, the embodiments may take different forms and should not be construed as being limited to the description set forth herein. Therefore, the following description of the embodiments is intended to explain aspects of the description only by referring to the accompanying drawings.

[0070] For ease of explanation, the dimensions of the elements in the accompanying drawings may be enlarged. Therefore, since the dimensions and thicknesses of the components in the drawings can be arbitrarily illustrated for ease of explanation, the following embodiments of this disclosure are not limited thereto.

[0071] As used herein, expressions such as “a”, “an” and “the” used for the singular are intended to also include the plural form, unless the context clearly indicates otherwise.

[0072] It should be understood that the terms “comprises,” “comprising,” “includes,” “including,” “have,” “having,” “contains,” “containing,” etc., are intended to indicate the presence of the features, integers, steps, operations, elements, components, or combinations thereof specified in this disclosure, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

[0073] In the description, it should be understood that when an element (area, layer, section, etc.) is referred to as being “on”, “connected to”, or “linked to” another element, it may be directly on, directly connected to, or directly linked to another element, or one or more intermediate elements may be disposed therebetween.

[0074] As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items. For example, “A and / or B” can be understood to mean “A, B, or A and B”. The terms “and” and “or” can be used in the sense of conjunctions or antonymous conjunctions and can be understood as equivalent to “and / or”.

[0075] For purposes of meaning and interpretation, the term "at least one of..." is intended to include the meaning of "selected from at least one of...". For example, "at least one of A and B" can be understood to mean "A, B, or A and B". When preceding a column of elements, the term "at least one of..." modifies the elements of the entire column but not any individual element in the column.

[0076] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of embodiments of the inventive concept, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0077] The terms "below," "down," "above," "up," etc., are used to describe the relationships of the configurations shown in the accompanying drawings. These terms are used as relative concepts and are described with reference to the directions indicated in the drawings.

[0078] As used herein, the terms “about” or “approximately” include a specified value and mean within an acceptable range of deviation from the value, as determined by a person skilled in the art considering the relevant measurements and errors associated with the measurement of the quantity (i.e., limitations of the measurement system). For example, “about” may mean within one or more standard deviations, or within ±20%, ±10%, or ±5% of the specified value.

[0079] Unless otherwise defined or implied herein, all terms used (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should be further understood that terms (e.g., those defined in common dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant field and should not be interpreted in an idealized or overly formal sense unless expressly defined in the specification.

[0080] The light-emitting device according to the embodiments of this disclosure may include a first electrode;

[0081] The second electrode facing the first electrode; and

[0082] An intermediate layer is disposed between the first electrode and the second electrode, wherein

[0083] The intermediate layer may include a first emitter layer and a second emitter layer disposed between the first emitter layer and the second electrode.

[0084] The first emitter layer may contain a first compound and a second compound.

[0085] The second emission layer may contain a third compound and a fourth compound.

[0086] The first compound and the second compound are different from each other.

[0087] The third and fourth compounds are different from each other.

[0088] The fourth compound may include at least one selected from electron transport compounds and bipolar compounds, and

[0089] (i) The first compound may include a first fluorescent compound, and the third compound may include a second fluorescent compound satisfying Equation 1, or

[0090] (ii) The first compound may include a second fluorescent compound satisfying Equation 1, and the third compound may include the first fluorescent compound:

[0091] [Equation 1]

[0092] △E ST =S1-T1≤0.5eV.

[0093] In Equation 1, S1 is the lowest excited singlet state energy level (eV) of the second fluorescent compound, and T1 is the lowest excited triplet state energy level (eV) of the second fluorescent compound.

[0094] In the implementation scheme, the first electrode may be the anode.

[0095] The second electrode can be a cathode, and

[0096] The intermediate layer may further include a hole transport region disposed between the first electrode and the first emitter layer and an electron transport region disposed between the second emitter layer and the second electrode.

[0097] In the implementation scheme, the hole transport region may include a hole injection layer, a hole transport layer, an emission assist layer, an electron blocking layer, or any combination thereof, and

[0098] The electron transport region may include a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0099] In the implementation scheme, the second compound may include a hole transport compound.

[0100] In the implementation scheme, the second and third compounds can be different from each other; or

[0101] The first compound and the fourth compound can be different from each other.

[0102] In the implementation scheme, the first compound, the second compound, the third compound, and the fourth compound may be different from each other.

[0103] In the implementation scheme, the first emission layer can directly contact the second emission layer.

[0104] In the embodiments, each of the first and third compounds can emit light with a maximum emission wavelength of about 400 nm to about 600 nm.

[0105] In the implementation scheme, each of the first and third compounds can emit blue or blue-green light.

[0106] In the implementation scheme, the intermediate layer may emit blue light or blue-green light.

[0107] In the implementation, the intermediate layer can emit light with a maximum emission wavelength of about 400 nm to about 600 nm.

[0108] In the implementation scheme, the amount of the second compound may be greater than the amount of the first compound, and

[0109] The amount of the fourth compound can be greater than the amount of the third compound.

[0110] In the implementation scheme, the first compound may be a dopant of the first emission layer, and the second compound may be the host of the first emission layer.

[0111] In the implementation scheme, the third compound may be a dopant of the second emission layer, and the fourth compound may be the host of the second emission layer.

[0112] In the implementation scheme, the electron transport compound may contain at least one electron-withdrawing group.

[0113] Bipolar compounds may comprise: (i) at least one electron-withdrawing group and at least one electron-donating group, (ii) anthracene group and furan group, or (iii) at least one electron-withdrawing group, at least one electron-donating group, anthracene group and furan group; and

[0114] Hole transport compounds may contain at least one electron-donating group.

[0115] In the implementation scheme, the electron-withdrawing group can be selected from:

[0116] -F, -CFH2, -CF2H, -CF3, -CN, and -NO2;

[0117] C1-C substituted by at least one of -F, -CFH2, -CF2H, -CF3, -CN and -NO2 60 alkyl groups; and

[0118] Unreplaced or by at least one R 10a Substituted C1-C nitrogen containing π-electron-deficient atoms60 Cyclic groups, and

[0119] Electron-donating groups can be selected from unsubstituted groups or groups with at least one R group. 10a C3-C electron-rich cells with -N(Q1)(Q2) substitution and π-electron substitution 60 Cyclic groups,

[0120] R 10a It could be:

[0121] Deuterium (-D), -F, -Cl, -Br, -I, hydroxyl group, cyano group or nitro group;

[0122] Each of the following groups is unsubstituted or replaced: -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group, C6-C 60 aryl thioyl groups, -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 C1-C substituted by (or any combination thereof) 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group or C1-C 60 alkoxy group;

[0123] Each of the following groups is unsubstituted or replaced: -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1-C 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group, C1-C 60 alkoxy group, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group, C6-C 60 aryl thioyl groups, -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 C3-C replaced by any combination thereof 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group or C6-C 60 aryl thioyl group; or

[0124] -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 ),

[0125] Among them, Q1, Q2, Q 11 To Q 13 Q 21 To Q 23 And Q 31 To Q 33 These can be, 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 groups; or each unsubstituted or deuterated, -F, cyano groups, C1-C 60 Alkyl groups, C1-C 60 C3-C substituted with alkoxy groups, phenyl groups, biphenyl groups, or any combination thereof 60 Carbocyclic groups or C1-C 60 Heterocyclic groups.

[0126] In the implementation plan, C1-C containing nitrogen lacking π electrons... 60 The cyclic group can be: a) a first ring, b) a fused ring in which at least two first rings are fused, or c) a fused ring in which at least one first ring and at least one second ring are fused.

[0127] C3-C rich in π electrons 60 The cyclic group can be: a) a second ring or b) a fused ring in which at least two second rings are fused together.

[0128] The first ring can be an imidazole group, pyrazole group, thiazole group, isothiazole group, oxazole group, isoxazole group, pyridine group, pyrazine group, pyridazine group, pyrimidine group, triazole group, tetraazole group, oxadiazole group, triazine group, or thiadiazole group, and

[0129] The second ring can be a phenyl group, a cyclopentadienyl group, a pyrrole group, a furan group, a thiophene group, or a thiophene group.

[0130] In the implementation plan, C1-C containing nitrogen lacking π electrons... 60 The cyclic group can be an imidazole group, pyrazole group, thiazole group, isothiazole group, oxazole group, isoxazole group, pyridine group, pyrazine group, pyridazine group, pyrimidine group, indazole group, purine group, quinoline group, isoquinoline group, benzo[a]quinoline group, benzo[a]isoquinoline group, phthalazine group, naphthidine group, quinoxaline group, benzo[a]quinoxaline group, quinazoline group, cinnamicin group, phenanthridine group, acridine group, phenanthrene-rhein group, phenazine group, benzimidazole group, isobenzo[a]thiazole group, benzo[a]oxazole group, benzo[a]isooxazole group, triazole group, tetraazole group, oxadiazole group, triazine group, thiadiazole group, imidazo[a]pyridine group, imidazo[a]pyrimidine group, azacarbazole group, azadibenzofuran group, azadibenzo[a]thiophene group, azadibenzo[a]thiophene group, or pyrido[a]pyrazine group, and

[0131] C3-C rich in π electrons 60 Cyclic groups can be phenyl groups, heptane groups, indene groups, naphthyl groups, chamomile ring groups, indole groups, acenaphthene groups, fluorene groups, spiro-difluorene groups, benzo[a]fluorene groups, dibenzo[a]fluorene groups, phenanthracene groups, anthracene groups, fluoranthracene groups, benzo[a]phenanthrene groups, pyrene groups, etc. Groups, tetraphenyl group, furan group, perylene group, pentaphenyl group, hexaphenyl group, pentaphenyl group, rutin group, kosmoyl group, ovoid group, pyrrole group, furan group, thiophene group, isoindole group, indole group, benzofuran group, benzothiophene group, benzothiorrole group, naphthopyrrole group, naphthofuran group, naphthothiophene group, naphthothiorrole group, benzocarbazole group, dibenzocarbazole group, dibenzo[] Furan group, dibenzothiophene group, carbazole group, dibenzothiophene group, indole-carbazole group, indole-carbazole group, benzofuran-carbazole group, benzothiophene-carbazole group, benzothiophene-carbazole group, triindole-phenyl group, pyrrolophenanthrene group, furan-phenanthrene group, thiophenanthrene group, benzonaphthuran group, benzonaphthiophene group, indole-phenanthrene group, benzofuran-phenanthrene group or benzothiophene-phenanthrene group.

[0132] In an embodiment, the second compound may include at least one compound represented by Formula 1:

[0133] [Formula 1]

[0134]

[0135] In Equation 1,

[0136] A 11 It can be unsubstituted or replaced by at least one R 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0137] L 11 To L 13 Each can be a single bond, unsubstituted, or affected by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0138] a11 to a13 can each be an integer from 1 to 3 independently.

[0139] Ar 11 and Ar 12 Each of these groups can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, unsubstituted, or substituted with at least one R. 10a Replacement C1-C 60 alkyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 alkenyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 The alkynyl group, unsubstituted or with at least one R 10a Replacement C1-C 60 alkoxy group, unsubstituted or with at least one R 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, unsubstituted or with at least one R 10a Replacement C6-C 60 aryloxy group, unsubstituted or with at least one R 10a Replacement C6-C 60Aryl thiols, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2),

[0140] m11 can be an integer from 1 to 8.

[0141] Q1 to Q3 and R 10a Same as described in the instruction manual.

[0142] In the implementation scheme, the fourth compound may include a compound represented by Formula 2:

[0143] [Equation 2]

[0144]

[0145] In Equation 2,

[0146] X 21 It can be N or C(R) 21 ),

[0147] X 22 It can be N or C(R) 22 ),

[0148] X 23 It can be N or C(R) 23 ),

[0149] X 21 To X 23 At least one of them can be N,

[0150] L 21 To L 23 Each can be independently selected from single bonds, unsubstituted bonds, or bonds formed by at least one R. 10a Replacement C3-C 60 Carbocyclic groups and unsubstituted or substituted groups with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0151] a21 to a23 can each be an integer from 1 to 3 independently.

[0152] Ar 21 To Ar 23 and R 21 To R 23 Each of these groups can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, unsubstituted, or substituted with at least one R. 10a Replacement C1-C 60 alkyl groups, unsubstituted or with at least one R 10aReplacement C2-C 60 alkenyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 The alkynyl group, unsubstituted or with at least one R 10a Replacement C1-C 60 alkoxy group, unsubstituted or with at least one R 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, unsubstituted or with at least one R 10a Replacement C6-C 60 aryloxy group, unsubstituted or with at least one R 10a Replacement C6-C 60 Arylthioyl groups, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2), b21 to b23 can each be an integer from 1 to 10, and

[0153] Q1 to Q3 and R 10a Same as described in the instruction manual.

[0154] In the implementation scheme, the fourth compound may include a compound represented by Formula 3:

[0155] [Formula 3]

[0156]

[0157] In Equation 3, Ar 31 It can be represented by one of the equations A to D, and

[0158] k31 can be an integer from 0 to 10.

[0159] In Equation 3 and Equations A through D,

[0160] A 31 and A 32 Each can be independently selected from C3-C 30 Carbocyclic groups and C1-C 30 Heterocyclic groups,

[0161] R 30 To R 34 Each of these groups can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, unsubstituted, or substituted with at least one R. 10a Replacement C1-C 60alkyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 alkenyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 The alkynyl group, unsubstituted or with at least one R 10a Replacement C1-C 60 alkoxy group, unsubstituted or with at least one R 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, unsubstituted or with at least one R 10a Replacement C6-C 60 aryloxy group, unsubstituted or with at least one R 10a Replacement C6-C 60 Aryl thiols, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2),

[0162] c30 can be an integer from 1 to 10.

[0163] d31 can be an integer from 1 to 10.

[0164] d32 can be an integer from 1 to 10.

[0165] d33 can be an integer from 1 to 3.

[0166] d34 can be 1 or 2, and

[0167] * indicates a binding site with an adjacent atom.

[0168] The sum of k31 and c30 can be 10.

[0169] Q1 to Q3 and R 10a Same as described in the instruction manual.

[0170] In the implementation scheme, the second fluorescent compound may include a compound that does not contain carbazole.

[0171] A carbazole-free compound is a compound that does not contain a carbazole group. For example, a second fluorescent compound may include a compound that does not contain a carbazole group.

[0172] In the embodiments, the second fluorescent compound may include at least one compound represented by one of formulas 4-1 to 4-9:

[0173] [Equation 4-1]

[0174]

[0175] [Equation 4-2]

[0176]

[0177] [Equation 4-3]

[0178]

[0179] [Equation 4-4]

[0180]

[0181] [Equation 4-5]

[0182] (EDG) b41 -[(L 44 ) a44 -(EWG) t42 ] s41

[0183] [Equation 4-6]

[0184] (EWG) t42 -[(L 44 ) a44 -(EDG) b41 ] s42

[0185] [Equation 4-7]

[0186] (EDG) b411 -(L 44 ) a44 -(EWG) t42 -(L 45 ) a45 -(EDG) b412

[0187] [Equation 4-8]

[0188] (EWG) t421 -(L 44 ) a44 -(EDG) b41 -(L 45 ) a45 -(EWG) t422

[0189] [Equation 4-9]

[0190] A 41 -[(L 44 ) a44 -(EDG) b41 ] s43.

[0191] In Equation 4-1,

[0192] A 41 It can be unsubstituted or replaced by at least one R 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0193] L 41 To L 43 Each can be a single bond, unsubstituted, or affected by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0194] a41 to a43 can each be an integer from 1 to 3 independently.

[0195] Ar 41 and Ar 42 Each can be independently unsubstituted or by at least one R. 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, or unsubstituted or with at least one R 10a Replacement C6-C 60 aryloxy group,

[0196] m41 can be an integer from 1 to 6.

[0197] In equations 4-2 to 4-4,

[0198] X 41 To X 45 Each can be an independent single bond, O, S, N(R) 46 ), B(R) 46 ), C(R 46 (R) 47 ) or Si(R 46 (R) 47 ),

[0199] n41 and n42 can each be 0, 1, or 2 independently. When n41 is 0, A 41 and A 42 They can be unconnected to each other, and when n42 is 0, A 44 and A 45 They can be disconnected from each other.

[0200] Y 41 and Y 42 Each can be independently N, B, P, P (=O) or P (=S).

[0201] Z 41 and Z 42 They can be N and C(R) independently. 48 ) or Si(R 48 ),

[0202] A 41 To A 45 Each can be independently selected from C3-C 30 Carbocyclic groups and C1-C 30 Heterocyclic groups,

[0203] R 41 To R 48 Each of these groups can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, unsubstituted, or substituted with at least one R. 10a Replacement C1-C 60 alkyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 alkenyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 The alkynyl group, unsubstituted or with at least one R 10a Replacement C1-C 60 alkoxy group, unsubstituted or with at least one R 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, unsubstituted or with at least one R 10a Replacement C6-C 60 aryloxy group, unsubstituted or with at least one R 10a Replacement C6-C 60 Aryl thiols, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2),

[0204] c41 to c45 can each be an integer from 1 to 10 independently.

[0205] In equations 4-5 to 4-9,

[0206] A 41 It can be unsubstituted or replaced by at least one R10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0207] EDG indicates an electron-donating group, and EWG indicates an electron-withdrawing group.

[0208] b41, b411, b412, t42, t421, and t422 can each be independently selected from 1, 2, and 3.

[0209] L 44 and L 45 Each can be a single bond, unsubstituted, or affected by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0210] a44 and a45 can each be an integer from 1 to 3 independently.

[0211] s41 and s42 can each be an integer from 1 to 3 independently, and

[0212] s43 can be an integer from 1 to 6.

[0213] Q1 to Q3 and R 10a Same as described in the instruction manual.

[0214] In the embodiments, the second fluorescent compound may be selected from compounds 4-1 to 4-12, but is not limited thereto:

[0215]

[0216] According to another aspect of this disclosure, the light-emitting device may include a first electrode.

[0217] Facing the second electrode of the first electrode,

[0218] m light-emitting units stacked between the first and second electrodes and including an emission layer, and

[0219] An m-1 charge generation layer is set between two adjacent light-emitting units out of m light-emitting units.

[0220] Where m is an integer of 2 or greater than 2.

[0221] The emission layer may include a first emission layer and a second emission layer disposed between the first emission layer and the second electrode.

[0222] The first emitter layer may contain a first compound and a second compound.

[0223] The second emission layer may contain a third compound and a fourth compound.

[0224] The first compound and the second compound are different from each other.

[0225] The third and fourth compounds are different from each other.

[0226] The fourth compound may include at least one selected from electron transport compounds and bipolar compounds, and

[0227] (i) The first compound may include a first fluorescent compound, and the third compound may include a second fluorescent compound satisfying Equation 1, or

[0228] (ii) The first compound may include a second fluorescent compound satisfying Equation 1, and the third compound may include the first fluorescent compound:

[0229] [Equation 1]

[0230] △E ST =S1-T1≤0.5eV.

[0231] In Equation 1, S1 is the lowest excited singlet state energy level (eV) of the second fluorescent compound, and T1 is the lowest excited triplet state energy level (eV) of the second fluorescent compound.

[0232] In an implementation, the maximum emission wavelength of light emitted from at least one of the light-emitting units may be different from the maximum emission wavelength of light emitted from at least one of the remaining light-emitting units.

[0233] In the implementation scheme, the maximum emission wavelength of the light emitted from each of the m light-emitting units can all be the same.

[0234] In the implementation scheme, m can be 3 or 4.

[0235] In the embodiments, each of the first and third compounds can emit light with a maximum emission wavelength of about 400 nm to about 600 nm.

[0236] In the implementation scheme, each of the first and third compounds can emit blue or blue-green light.

[0237] According to the implementation scheme, the electronic device may include a light-emitting device, and

[0238] Thin-film transistor,

[0239] The thin-film transistor may include a source electrode and a drain electrode, and

[0240] The first electrode of the light-emitting device can be electrically connected to the source electrode or the drain electrode.

[0241] In the implementation scheme, the electronic device may further include a color filter, a color conversion layer, a touch screen layer, a polarization layer, or any combination thereof.

[0242] The light-emitting device may include a first emitting layer comprising a first compound and a second compound, and a second emitting layer comprising a third compound and a fourth compound, wherein the fourth compound may include at least one selected from electron transport compounds and bipolar compounds, and (i) the first compound may include a first fluorescent compound and the third compound may include a second fluorescent compound satisfying Equation 1, or (ii) the first compound may include a second fluorescent compound satisfying Equation 1 and the third compound may include a first fluorescent compound.

[0243] Since the light-emitting device includes a first emitting layer and a second emitting layer, the recombination region of holes and electrons can move between the first emitting layer and the second emitting layer, which prevents degradation caused by interfacial emission from the emitting auxiliary layer and thus achieves a long service life.

[0244] In the light-emitting device, (i) the first compound may include a first fluorescent compound, and the third compound may include a second fluorescent compound satisfying Equation 1; or (ii) the first compound may include a second fluorescent compound satisfying Equation 1, and the third compound may include the first fluorescent compound. Therefore, a narrow triplet-triplet fusion (TTF) region can be formed, and the quantum efficiency of the second fluorescent compound can be 100%. Thus, a light-emitting device with high efficiency can be obtained.

[0245] When such a structure is applied to a series-connected device with three or more light-emitting units, the resulting light-emitting device can have high efficiency and long lifespan. For multi-peak series-connected blue emission (e.g., blue and green in series) with three or more light-emitting units, when such a structure is applied to at least one light-emitting unit of the light-emitting device, the resulting light-emitting device can have high efficiency and long lifespan.

[0246] Therefore, light-emitting devices such as organic light-emitting devices can have high maximum quantum efficiency, high efficiency, and long lifespan.

[0247] As used herein, the expression "(intermediate layer) contains at least one first compound" can include cases where "(intermediate layer) contains the same first compound" and cases where "(intermediate layer) contains two or more different first compounds".

[0248] For example, the intermediate layer may contain only compound 1 as the first compound. In this embodiment, compound 1 may be contained in the emitting layer of the organic light-emitting device. In another embodiment, the intermediate layer may contain both compound 1 and compound 2 as the first compound. In this embodiment, compound 1 and compound 2 may be contained in the same layer (e.g., both compound 1 and compound 2 may be contained in the emitting layer) or in different layers (e.g., compound 1 may be contained in the emitting layer, and compound 2 may be contained in the electron transport layer).

[0249] As used herein, the term "intermediate layer" refers to one or more layers located between the first and second electrodes of an organic light-emitting device. The materials contained in the "intermediate layer" are not limited to organic materials.

[0250] For example, the light-emitting device may have a stacked structure in which a first electrode, an intermediate layer, a second electrode, and a second cover layer are stacked in this prescribed order; or a stacked structure in which a first cover layer, a first electrode, an intermediate layer, and a second electrode are stacked in this prescribed order; or a stacked structure in which a first cover layer, a first electrode, an intermediate layer, a second electrode, and a second cover layer are stacked in this prescribed order.

[0251] [ Figure 1 [Description]

[0252] Figure 1 This is a schematic cross-sectional view of the light-emitting device 10 according to an embodiment. The light-emitting device 10 includes a first electrode 110, an intermediate layer 130, and a second electrode 150.

[0253] In the following text, we will combine Figure 1 The structure of the light-emitting device 10 according to the embodiment and the method of manufacturing the light-emitting device 10 are described.

[0254] [First Electrode 110]

[0255] exist Figure 1 In this embodiment, the substrate may additionally be located below the first electrode 110 or above the second electrode 150. The substrate may be a glass substrate or a plastic substrate. The substrate may be a flexible substrate. In embodiments, the substrate may include a plastic with excellent heat resistance and durability, such as polyimide, polyethylene terephthalate (PET), polycarbonate, polyethylene naphthalate, polyarylate (PAR), polyetherimide, or combinations thereof.

[0256] The first electrode 110 can be formed, for example, by depositing or sputtering a material for forming the first electrode 110 onto a substrate. When the first electrode 110 is an anode, a high work function material that can easily inject holes can be used as the material for the first electrode 110.

[0257] The first electrode 110 can be a reflective electrode, a semi-transparent electrode, or a transmissive electrode. When the first electrode 110 is a transmissive electrode, the material used to form the first electrode 110 can include indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), zinc oxide (ZnO), or any combination thereof. In an embodiment, when the first electrode 110 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 can be used as the material for forming the first electrode 110.

[0258] The first electrode 110 may have a single-layer structure consisting of a single layer or a multi-layer structure comprising multiple layers. In an embodiment, the first electrode 110 may have a three-layer structure of ITO / Ag / ITO.

[0259] [Middle Layer 130]

[0260] An intermediate layer 130 is disposed on the first electrode 110. The intermediate layer 130 includes an emission layer.

[0261] The intermediate layer 130 may further include a hole transport region located between the first electrode 110 and the emitter layer and an electron transport region located between the emitter layer and the second electrode 150.

[0262] In addition to various organic materials, the intermediate layer 130 may further contain metal-containing compounds (e.g., organometallic compounds), inorganic materials (e.g., quantum dots), etc.

[0263] In an embodiment, the intermediate layer 130 may include i) two or more light-emitting units sequentially stacked between the first electrode 110 and the second electrode 150, and ii) at least one charge-generating layer between adjacent light-emitting units. When the intermediate layer 130 includes the light-emitting units as described above and at least one charge-generating layer, the light-emitting device 10 may be a series-connected light-emitting device.

[0264] [Hole transport region in intermediate layer 130]

[0265] The hole 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 single layer made of different materials, or iii) a multi-layer structure comprising multiple layers containing different materials.

[0266] The hole transport region may include a hole injection layer (HIL), a hole transport layer (HTL), an emission auxiliary layer, an electron blocking layer (EBL), or any combination thereof.

[0267] For example, the hole transport region may have a multilayer structure including a hole injection layer / hole transport layer structure, a hole injection layer / hole transport layer / emission auxiliary layer structure, a hole injection layer / emission auxiliary layer structure, a hole transport layer / emission auxiliary layer structure, or a hole injection layer / hole transport layer / electron blocking layer structure, wherein, in each structure, the layers are stacked sequentially from the first electrode 110.

[0268] The hole transport region may contain a compound represented by Formula 201, a compound represented by Formula 202, or any combination thereof:

[0269] [Formula 201]

[0270]

[0271] [Formula 202]

[0272]

[0273] In equations 201 and 202,

[0274] L 201 To L 204 Each can be independently unsubstituted or by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0275] L 205 It can be *-O-*', *-S-*', or *-N(Q) 201 )-*', unsubstituted or by at least one R 10a Replacement C1-C 20 alkylene groups, unsubstituted or with at least one R 10a Replacement C2-C 20 alkenyl groups, unsubstituted or with at least one R 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0276] xa1 to xa4 are each an independent integer from 0 to 5.

[0277] xa5 is an integer from 0 to 10.

[0278] R 201 To R 204 and Q 201 Each can be independently unsubstituted or by at least one R. 10aReplacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0279] R 201 and R 202 It can be optionally via a single bond, unsubstituted, or by at least one R 10a Substituted C1-C5 alkylene groups, or unsubstituted or substituted with at least one R 10a The substituted C2-C5 alkenyl groups are linked together to form unsubstituted or substituted groups with at least one R group. 10a Replacement C8-C 60 Polycyclic groups (e.g., carbazole groups, etc.) (e.g., see compound HT16 below),

[0280] R 203 and R 204 It can be optionally via a single bond, unsubstituted, or by at least one R 10a Substituted C1-C5 alkylene groups, or unsubstituted or substituted with at least one R 10a The substituted C2-C5 alkenyl groups are linked together to form unsubstituted or substituted groups with at least one R group. 10a Replacement C8-C 60 Polycyclic groups, and

[0281] na1 can be an integer from 1 to 4.

[0282] In the embodiments, formulas 201 and 202 may each contain at least one of the groups represented by formulas CY201 to CY217:

[0283]

[0284] Regarding formulas CY201 to CY217, R 10b and R 10c Regarding R 10a The descriptions are the same, CY ring 201 To CY 204 Each can be C3-C independently. 20 Carbocyclic groups or C1-C 20 Heterocyclic groups, and at least one hydrogen atom in formulas CY201 to CY217 may be unsubstituted or substituted by at least one R described herein. 10a replace.

[0285] In the implementation plan, the ring CY in formulas CY201 to CY217 201 To CY 204 Each group can be an independent phenyl group, naphthol group, phenanthrene group, or anthracene group.

[0286] In the embodiments, formulas 201 and 202 may each contain at least one of the groups represented by formulas CY201 to CY203:

[0287] In an embodiment, formula 201 may include at least one of the groups represented by formulas CY201 to CY203 and at least one of the groups represented by formulas CY204 to CY217.

[0288] In the implementation scheme, in equation 201, xa1 is 1, and R 201 It is a group represented by one of the formulas CY201 to CY203, where xa2 is 0, and R 202 It is a group represented by one of the formulas CY204 to CY207.

[0289] In the implementation, each of Formula 201 and Formula 202 may not contain a group represented by one of Formulas CY201 to CY203.

[0290] In the embodiments, each of Formulas 201 and 202 may not contain a group represented by one of Formulas CY201 to CY203, but may contain at least one of the groups represented by Formulas CY204 to CY217.

[0291] In the implementation, each of Formula 201 and Formula 202 may not contain a group represented by one of Formulas CY201 to CY217.

[0292] In the implementation scheme, the hole transport region may comprise one or any combination of compounds HT1 to HT44, m-MTDATA, TDATA, 2-TNATA, NPB (NPD), β-NPB, TPD, spiro-TPD, spiro-NPB, methylated-NPB, TAPC, HMTPD, 4,4',4”-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / camphorsulfonic acid (PANI / CSA), and polyaniline / poly(4-styrenesulfonate) (PANI / PSS):

[0293]

[0294]

[0295]

[0296]

[0297]

[0298] The thickness of the hole transport region can be approximately to approximately For example, the thickness of the hole transport region can be approximately to approximately When the hole transport region includes a hole injection layer, a hole transport layer, or any combination thereof, the thickness of the hole injection layer can be approximately to approximately Furthermore, the thickness of the hole transport layer can be approximately to approximately For example, the thickness of the hole injection layer can be approximately to approximately For example, the thickness of the hole transport layer can be approximately to approximately When the thicknesses of the hole transport region, hole injection layer, and hole transport layer are within these ranges, satisfactory hole transport characteristics can be obtained without a significant increase in driving voltage.

[0299] The emission assist layer can increase light emission efficiency by compensating for the optical resonant distance according to the wavelength of the light emitted by the emission layer, and the electron blocking layer can block the flow of electrons from the electron transport region. The emission assist layer and the electron blocking layer can contain materials as described above.

[0300] [p-dopant]

[0301] In addition to these materials, the hole transport region may further contain charge-generating materials to improve conductivity. The charge-generating materials may be uniformly or non-uniformly dispersed in the hole transport region (e.g., in the form of a single layer composed of charge-generating materials).

[0302] The charge-generating material can be, for example, a p-doped agent.

[0303] In the implementation, the lowest unoccupied molecular orbital (LUMO) energy level of the p-dopant can be equal to or less than about -3.5 eV.

[0304] In the embodiments, the p-dopant may include quinone derivatives, compounds containing cyano groups, compounds containing elements EL1 and EL2, or any combination thereof.

[0305] Examples of quinone derivatives are TCNQ and F4-TCNQ.

[0306] Examples of compounds containing a cyano group are HAT-CN and compounds represented by the following formula 221.

[0307]

[0308] [Equation 221]

[0309]

[0310] In Equation 221,

[0311] R 221 To R 223 Each can be independently unsubstituted or by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, and

[0312] R 221 To R 223 At least one of them can be independently a C1-C group substituted with: a cyano group; -F; -Cl; -Br; -I; or any combination thereof. 20 Alkyl groups; or C3-C groups substituted with any combination thereof 60 Carbocyclic groups or C1-C 60 Heterocyclic groups.

[0313] Regarding compounds containing elements EL1 and EL2, element EL1 can be a metal, a metalloid, or a combination thereof, and element EL2 can be a nonmetal, a metalloid, or a combination thereof.

[0314] Examples of metals include: 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 (C), etc.). (e.g., o), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au), etc.); later transition metals (e.g., zinc (Zn), indium (In), tin (Sn), etc.); and lanthanides (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.).

[0315] Examples of metalloids are silicon (Si), antimony (Sb), and tellurium (Te).

[0316] Examples of nonmetals are oxygen (O) and halogens (e.g., F, Cl, Br, I, etc.).

[0317] In the embodiments, examples of compounds containing elements EL1 and EL2 are metal oxides, metal halides (e.g., metal fluorides, metal chlorides, metal bromides, or metal iodides), metal halide-like compounds (e.g., metal fluoride-like compounds, metal chloride-like compounds, metal bromide-like compounds, or metal iodide-like compounds), metal tellurides, and any combination thereof.

[0318] Examples of metal oxides are tungsten oxides (e.g., WO, W2O3, WO2, WO3, or W2O5), vanadium oxides (e.g., VO, V2O3, VO2, or V2O5), molybdenum oxides (e.g., MoO, Mo2O3, MoO2, MoO3, or Mo2O5), and rhenium oxides (e.g., ReO3).

[0319] Examples of metal halides include alkali metal halides, alkaline earth metal halides, transition metal halides, post-transition metal halides, and lanthanide metal halides.

[0320] Examples of alkali metal halides are LiF, NaF, KF, RbF, CsF, LiCl, NaCl, KCl, RbCl, CsCl, LiBr, NaBr, KBr, RbBr, CsBr, LiI, NaI, KI, RbI, and CsI.

[0321] Examples of alkaline earth metal halides are BeF2, MgF2, CaF2, SrF2, BaF2, BeCl2, MgCl2, CaCl2, SrCl2, BaCl2, BeBr2, MgBr2, CaBr2, SrBr2, BaBr2, BeI2, MgI2, CaI2, SrI2, and BaI2.

[0322] Examples of transition metal halides are titanium halides (e.g., TiF4, TiCl4, TiBr4, or TiI4), zirconium halides (e.g., ZrF4, ZrCl4, ZrBr4, or ZrI4), hafnium halides (e.g., HfF4, HfCl4, HfBr4, or HfI4), vanadium halides (e.g., VF3, VCl3, VBr3, or VI3), niobium halides (e.g., NbF3, NbCl3, NbBr3, or NbI3), and tantalum halides (e.g., TaF3, TaCl3, Ta...). Br3 or TaI3), chromium halides (e.g., CrF3, CrCl3, CrBr3 or CrI3), molybdenum halides (e.g., MoF3, MoCl3, MoBr3 or MoI3), tungsten halides (e.g., WF3, WCl3, WBr3 or WI3), manganese halides (e.g., MnF2, MnCl2, MnBr2 or MnI2), technetium halides (e.g., TcF2, TcCl2, TcBr2 or TcI2), rhenium halides (e.g., ReF2, ReCl2, ReBr... 2 or ReI2), iron halides (e.g., FeF2, FeCl2, FeBr2 or FeI2), ruthenium halides (e.g., RuF2, RuCl2, RuBr2 or RuI2), osmium halides (e.g., OsF2, OsCl2, OsBr2 or OsI2), cobalt halides (e.g., CoF2, CoCl2, CoBr2 or CoI2), rhodium halides (e.g., RhF2, RhCl2, RhBr2 or RhI2), iridium halides (e.g., IrF2, IrCl2, Ir Nickel halides (e.g., NiF2, NiCl2, NiBr2, or NiI2), palladium halides (e.g., PdF2, PdCl2, PdBr2, or PdI2), platinum halides (e.g., PtF2, PtCl2, PtBr2, or PtI2), copper halides (e.g., CuF, CuCl, CuBr, or CuI), silver halides (e.g., AgF, AgCl, AgBr, or AgI), and gold halides (e.g., AuF, AuCl, AuBr, or AuI).

[0323] Examples of post-transition metal halides are zinc halides (e.g., ZnF2, ZnCl2, ZnBr2, or ZnI2), indium halides (e.g., InI3), and tin halides (e.g., SnI2).

[0324] Examples of lanthanide metal halides are YbF, YbF2, YbF3, SmF3, YbCl, YbCl2, YbCl3, SmCl3, YbBr, YbBr2, YbBr3, SmBr3, YbI, YbI2, YbI3, and SmI3.

[0325] Examples of metal halide-like compounds are antimony halides (e.g., SbCl5).

[0326] Examples of metal tellurides include alkali metal tellurides (e.g., Li₂Te, Na₂Te, K₂Te, Rb₂Te, or Cs₂Te), alkaline earth metal tellurides (e.g., BeTe, MgTe, CaTe, SrTe, or BaTe), and transition metal tellurides (e.g., TiTe₂, ZrTe₂, HfTe₂, V₂Te₃, Nb₂Te₃, Ta₂Te₃, Cr₂Te₃, Mo₂Te₃, W₂Te₃, MnTe, TcTe, ReTe, Fe). Te, RuTe, OsTe, CoTe, RhTe, IrTe, NiTe, PdTe, PtTe, Cu2Te, CuTe, Ag2Te, AgTe or Au2Te), post-transition metal tellurides (e.g., ZnTe) and lanthanide metal tellurides (e.g., LaTe, CeTe, PrTe, NdTe, PmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe or LuTe).

[0327] [Emitting layer in intermediate layer 130]

[0328] When the light-emitting device 10 is a full-color light-emitting device, the emitting layer can be patterned into a red emitting layer, a green emitting layer, and / or a blue emitting layer, depending on the sub-pixel. In an embodiment, the emitting layer may have a stacked structure of two or more layers selected from red, green, and blue emitting layers, wherein the two or more layers are in contact with or spaced apart from each other. In an embodiment, the emitting layer may contain two or more materials selected from red-emitting, green-emitting, and blue-emitting materials, wherein the two or more materials are mixed with each other in a single layer to emit white light.

[0329] The emission layer may include a first emission layer and a second emission layer.

[0330] The first emitter layer may contain a first compound and a second compound, and

[0331] The second emission layer may contain a third compound and a fourth compound.

[0332] The fourth compound may include at least one selected from electron transport compounds and bipolar compounds, and

[0333] (i) The first compound may include a first fluorescent compound, and the third compound may include a second fluorescent compound satisfying Equation 1, or

[0334] (ii) The first compound may include a second fluorescent compound satisfying Equation 1, and the third compound may include the first fluorescent compound:

[0335] [Equation 1]

[0336] △E ST =S1-T1≤0.5eV.

[0337] In Equation 1, S1 is the lowest excited singlet state energy level (eV) of the second fluorescent compound, and T1 is the lowest excited triplet state energy level (eV) of the second fluorescent compound.

[0338] The emitter layer can contain a host and dopants.

[0339] The first and third compounds can each be dopants, and the second and fourth compounds can each be the host.

[0340] The main body may include electron transport compounds and bipolar compounds; or it may include hole transport compounds.

[0341] The dopant may include a first fluorescent compound or a second fluorescent compound.

[0342] Dopants may include phosphorescent dopants, fluorescent dopants, or any combination thereof.

[0343] Based on 100 parts by weight of the host, the amount of dopant in the emitter layer can be from about 0.01 parts by weight to about 15 parts by weight.

[0344] In the implementation scheme, the emitter layer may contain quantum dots.

[0345] The emission layer may contain delayed fluorescence material. The delayed fluorescence material can act as either the host or a dopant in the emission layer.

[0346] The thickness of the emission layer can be approximately to approximately For example, the thickness of the emission layer can be approximately to approximately When the thickness of the emitting layer meets the range described above, it can exhibit excellent light-emitting characteristics without a significant increase in driving voltage.

[0347] [main body]

[0348] In the implementation scheme, the main component may include a compound represented by the following formula 301:

[0349] [Formula 301]

[0350] [Ar 301 ] xb11 -[(L 301 )xb1 -R 301 ] xb21

[0351] In Equation 301,

[0352] Ar 301 and L 301 Each can be independently unsubstituted or by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0353] xb11 can be 1, 2, or 3.

[0354] xb1 can be an integer from 0 to 5.

[0355] R 301 It can be hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, unsubstituted or with at least one R 10a Replacement C1-C 60 alkyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 alkenyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 The alkynyl group, unsubstituted or with at least one R 10a Replacement C1-C 60 alkoxy group, unsubstituted or with at least one R 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, -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 ),

[0356] R 10a Same as described in the instruction manual.

[0357] xb21 can be an integer from 1 to 5, and

[0358] Q 301 To Q 303 Same as the description regarding Q1.

[0359] In the implementation scheme, when xb11 in formula 301 is 2 or greater than 2, two or more Ar 301 They can be connected to each other via a single key.

[0360] In the implementation scheme, the main body may include a compound represented by formula 301-1, a compound represented by formula 301-2, or any combination thereof:

[0361] [Formula 301-1]

[0362]

[0363] [Formula 301-2]

[0364]

[0365] Among them, in equations 301-1 and 301-2,

[0366] Ring A 301 To Ring A 304 Each can be independently unsubstituted or by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0367] R 10a Same as described in the instruction manual.

[0368] X 301 It can be O, S, N-[(L 304 ) xb4 -R 304 ]、C(R 304 (R) 305 ) or Si(R 304 (R) 305 ),

[0369] xb22 and xb23 are each independently 0, 1, or 2.

[0370] L 301 xb1 and R 301 Same as described above,

[0371] L 302 To L 304 They can be independently related to L 301 The descriptions are the same.

[0372] xb2 to xb4 can each be independently identical to the description of xb1, and

[0373] R 302 To R 305 and R 311 To R 314 Regarding R 301 The descriptions are the same.

[0374] In the embodiments, the main component may include an alkaline earth metal complex. In the embodiments, the main component may be a Be complex (e.g., compound H55), a Mg complex, a Zn complex, or any combination thereof.

[0375] In the embodiments, the main body may include one or any combination of compounds H1 to H124, 9,10-bis(2-naphthyl)anthracene (ADN), 2-methyl-9,10-bis(naphthyl-2-yl)anthracene (MADN), 9,10-bis(2-naphthyl)-2-tert-butyl-anthracene (TBADN), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), 1,3-bis(N-carbazolyl)benzene (mCP), and 1,3,5-tris(carbazolyl-9-yl)benzene (TCP), but the embodiments of this disclosure are not limited thereto.

[0376]

[0377]

[0378]

[0379]

[0380]

[0381]

[0382] [Delayed fluorescence materials]

[0383] The emission layer may contain delayed fluorescence material.

[0384] The delayed fluorescence material used in this paper can be any compound that can emit delayed fluorescence light based on the delayed fluorescence emission mechanism.

[0385] Depending on the type of other materials contained in the emission layer, the delayed fluorescence material contained in the emission layer can act as either a host or a dopant.

[0386] In the embodiment, the difference between the triplet energy level (eV) and the singlet energy level (eV) of the delayed fluorescent material can be from about 0 eV to about 0.5 eV. When the difference between the triplet energy level (eV) and the singlet energy level (eV) of the delayed fluorescent material satisfies the range described above, an upconversion in which the delayed fluorescent material transitions from the triplet state to the singlet state can occur effectively, and therefore, the light emission efficiency of the light-emitting device 10 can be improved.

[0387] In the embodiments, the delayed fluorescence material may include i) containing at least one electron donor (e.g., a π-electron-rich C3-C3). 60 Cyclic groups (e.g., carbazole groups) and at least one electron acceptor (e.g., sulfoxide groups, cyano groups, or C1-C groups containing nitrogen lacking π electrons). 60 Materials containing cyclic groups, or ii) C8-C alloys comprising two or more cyclic groups sharing boron (B) and fused together with each other. 60 Materials with polycyclic groups.

[0388] Delayed fluorescence materials may include at least one of compounds DF1 to DF9:

[0389]

[0390] [Quantum dot]

[0391] The emitter layer can contain quantum dots.

[0392] The quantum dot used in this article refers to a crystal of a semiconductor compound, and can include any material capable of emitting light of various wavelengths depending on the size of the crystal.

[0393] The diameter of a quantum dot can be, for example, from about 1 nm to about 10 nm.

[0394] Quantum dots can be synthesized through wet chemical processes, organometallic chemical vapor deposition, molecular beam epitaxy, or similar processes.

[0395] Wet chemical processes refer to methods in which organic solvents and precursor materials are mixed and quantum dot crystals are grown. During crystal growth, the organic solvent acts as a dispersant naturally coordinated on the surface of the quantum dot crystals and controls the crystal growth. Therefore, the growth of quantum dot particles can be controlled using processes that are easier and less expensive to perform compared to vapor deposition processes such as metal-organic chemical vapor deposition (MOCVD) and molecular beam epitaxy (MBE).

[0396] Quantum dots can 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, group IV elements or compounds, or any combination thereof.

[0397] Examples of group II-VI semiconductor compounds are binary compounds, such as CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, or MgS; ternary compounds, such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, or MgZnS; quaternary compounds, such as CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, or HgZnSTe; and any combination thereof.

[0398] Examples of group III-V semiconductor compounds are binary compounds, such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, or InSb; ternary compounds, such as GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, or InPSb; quaternary compounds, such as GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, or InAlPSb; and any combination thereof. Group III-V semiconductor compounds may further contain group II elements. Further examples of group III-V semiconductor compounds containing group II elements are InZnP, InGaZnP, and InAlZnP.

[0399] Examples of III-VI semiconductor compounds are binary compounds, such as GaS, GaSe, Ga2Se3, GaTe, InS, In2S3, InSe, In2Se3, or InTe; ternary compounds, such as InGaS3 or InGaSe3; and any combination thereof.

[0400] Examples of group I-III-VI semiconductor compounds are ternary compounds, such as AgInS, AgInS2, CuInS, CuInS2, CuGaO2, AgGaO2, or AgAlO2; and any combination thereof.

[0401] Examples of group IV-VI semiconductor compounds are binary compounds, such as SnS, SnSe, SnTe, PbS, PbSe, or PbTe; ternary compounds, such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, or SnPbTe; quaternary compounds, such as SnPbSSe, SnPbSeTe, or SnPbSTe; and any combination thereof.

[0402] In the implementation scheme, group IV elements or compounds may include single elements, such as Si or Ge; binary compounds, such as SiC or SiGe; or any combination thereof.

[0403] Each element contained in a multi-element compound (e.g., binary, ternary, and quaternary compounds) may exist in the particles at a uniform or non-uniform concentration.

[0404] Quantum dots can have either a single structure with a uniform concentration of each element contained within the corresponding quantum dot, or a core-shell dual structure. In some embodiments, the material contained in the core can be different from the material contained in the shell.

[0405] The shell of a quantum dot can function as a protective layer to maintain semiconductor properties by preventing the chemical degradation of the nucleus, and / or as a charging layer to impart electrophoretic properties to the quantum dot. The shell can be single-layered or multi-layered. The interface between the nucleus and the shell can have a concentration gradient, where the concentration of elements present in the shell decreases towards the center.

[0406] Examples of the shells for quantum dots are oxides of metals or nonmetals, semiconductor compounds, or any combination thereof. Examples of oxides of metals or nonmetals are binary compounds (e.g., SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, or NiO); ternary compounds (e.g., MgAl2O4, CoFe2O4, NiFe2O4, or CoMn2O4); and any combination thereof. As described herein, examples of semiconductor compounds are 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. In the embodiments, 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.

[0407] The full width at half maximum (FWHM) of the emission wavelength spectrum of quantum dots can be less than or equal to about 45 nm. For example, the FWHM of the emission wavelength spectrum of quantum dots can be equal to or less than about 40 nm. For example, the FWHM of the emission wavelength spectrum of quantum dots can be equal to or less than about 30 nm. When the FWHM of the emission wavelength spectrum of quantum dots is within this range, color purity or color reproducibility can be improved. Light emitted through such quantum dots can illuminate omnidirectionally. Therefore, a wider viewing angle can be increased.

[0408] Quantum dots can be spherical, pyramidal, multi-armed, or cubic nanoparticles, nanotubes, nanowires, nanofibers, or nanoplate particles.

[0409] By adjusting the size of the quantum dots, the band gap can also be adjusted, thereby obtaining light of various wavelengths in the quantum dot emission layer. Therefore, by using quantum dots of different sizes, light-emitting devices that emit light of various wavelengths can be implemented. In some implementations, the size of the quantum dots can be selected to emit red, green, and / or blue light. The size of the quantum dots can be adjusted to combine various colors of light to emit white light.

[0410] [Electron transport region in intermediate layer 130]

[0411] 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 single layer made of different materials, or iii) a multi-layer structure comprising multiple layers containing different materials.

[0412] The 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.

[0413] In the implementation scheme, the electron transport region may have an electron transport layer / electron injection layer structure, a hole blocking layer / electron transport layer / electron injection layer structure, an electron control layer / electron transport layer / electron injection layer structure, or a buffer layer / electron transport layer / electron injection layer structure, wherein, for each structure, the constituent layers are stacked sequentially from the emission layer.

[0414] The electron transport region (e.g., a buffer layer, hole blocking layer, electron control layer, or electron transport layer within the electron transport region) may contain C1-C atoms with at least one π-electron-deficient nitrogen atom. 60 Metal-free compounds with cyclic groups.

[0415] In an implementation, the electron transport region may comprise a compound represented by the following formula 601:

[0416] [Formula 601]

[0417] [Ar 601 ] xe11 -[(L 601 ) xe1 -R 601 ] xe21

[0418] In Equation 601,

[0419] Ar 601 and L 601 Each can be independently unsubstituted or by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups,

[0420] xe11 can be 1, 2, or 3.

[0421] xe1 can be 0, 1, 2, 3, 4, or 5.

[0422] R 601 It can be unsubstituted or replaced by at least one R 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, -Si(Q) 601 (Q) 602 (Q) 603 -C(=O)(Q) 601-S(=O)2(Q) 601 ) or -P(=O)(Q 601 (Q) 602 ),

[0423] Q 601 To Q 603 Same as described regarding Q1,

[0424] xe21 can be 1, 2, 3, 4, or 5, and

[0425] Ar 601 L 601 and R 601 At least one of them can be independently unsubstituted or by at least one R. 10a Substituted C1-C nitrogen containing π-electron-deficient atoms 60 Cyclic groups.

[0426] In the implementation scheme, when xe11 in formula 601 is 2 or greater than 2, two or more Ar 601 They can be connected to each other via a single key.

[0427] In the implementation scheme, Ar in Formula 601 601 It can be a substituted or unsubstituted anthracene group.

[0428] In the implementation scheme, the electron transport region may comprise a compound represented by formula 601-1:

[0429] [Formula 601-1]

[0430]

[0431] In Equation 601-1,

[0432] X 614 It can be N or C(R) 614 ), X 615 It can be N or C(R) 615 ), X 616 It can be N or C(R) 616 ), and X 614 To X 616 At least one of them can be N,

[0433] L 611 To L 613 You can refer to L 601 To understand from the presented description,

[0434] xe611 to xe613 can be understood by referring to the description of xe1 presentation.

[0435] R 611To R 613 You can refer to information about R 601 To understand from the presented description, and

[0436] R 614 To R 616 Each of these can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1-C 20 Alkyl groups, C1-C 20 alkoxy group, unsubstituted or with at least one R 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups.

[0437] In the implementation scheme, xe1 and xe611 to xe613 in Formula 601 and Formula 601-1 can each be 0, 1 or 2 independently.

[0438] The electron transport region may contain one or any combination of compounds ET1 to ET45, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), Alq3, BAlq, TAZ, and NTAZ.

[0439]

[0440]

[0441]

[0442] The thickness of the electron transport region can be approximately to approximately For example, the thickness of the electron transport region can be approximately to approximately When 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, hole blocking layer, or electron control layer can be independently approximately [missing information]. to approximately Furthermore, the thickness of the electron transport layer can be approximately to approximately For example, the thickness of the buffer layer, hole blocking layer, or electronic control layer can each be approximately [missing information]. to approximately For example, the thickness of the electron transport layer can be approximately to approximately When the thicknesses of the buffer layer, hole blocking layer, electronic control layer, and / or electron transport layer are within these ranges, satisfactory electron transport characteristics can be obtained without a significant increase in driving voltage.

[0443] In addition to the materials described above, the electron transport region (e.g., the electron transport layer in the electron transport region) may further contain a metallic material.

[0444] Materials containing metals may include alkali metal complexes, alkaline earth metal complexes, or any combination thereof. The metal ion in an alkali metal complex may be Li, Na, K, Rb, or Cs ions, and the metal ion in an alkaline earth metal complex may be Be, Mg, Ca, Sr, or Ba ions. The ligand coordinating with the metal ion in the alkali metal or alkaline earth metal complex may be hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthrene, cyclopentadiene, or any combination thereof.

[0445] In this embodiment, the metal-containing material may include a Li complex. The Li complex may include, for example, compound ET-D1 (LiQ) or compound ET-D2.

[0446]

[0447] The electron transport region may include an electron injection layer that facilitates the injection of electrons from the second electrode 150. The electron injection layer may be in direct contact with the second electrode 150.

[0448] 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 single layer made of different materials, or iii) a multi-layer structure comprising multiple layers containing different materials.

[0449] The electron injection layer may contain 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.

[0450] Alkali metals may include Li, Na, K, Rb, Cs, or any combination thereof. Alkali earth metals may include Mg, Ca, Sr, Ba, or any combination thereof. Rare earth metals may include Sc, Y, Ce, Tb, Yb, Gd, or any combination thereof.

[0451] Compounds containing alkali metals, compounds containing alkaline earth metals, and compounds containing rare earth metals may include oxides and halides (e.g., fluorides, chlorides, bromides, or iodides), tellurides of alkali metals, alkaline earth metals, and rare earth metals, or any combination thereof.

[0452] Compounds containing alkali metals may be alkali metal oxides (e.g., Li2O, Cs2O, or K2O) and alkali metal halides (e.g., LiF, NaF, CsF, KF, LiI, NaI, CsI, or KI) or any combination thereof. Compounds containing alkaline earth metals may include alkaline earth metal compounds such as BaO, SrO, CaO, Ba x Sr 1-x O (where x is a real number satisfying the condition 0 < x < 1) or Ba x Ca 1-x O (where x is a real number satisfying the condition 0 < x < 1). Compounds containing rare earth metals may include YbF3, ScF3, Sc2O3, Y2O3, Ce2O3, GdF3, TbF3, YbI3, ScI3, TbI3, or any combination thereof. In an embodiment, the compound containing a rare earth metal may include lanthanide metal tellurides. Examples of lanthanide metal tellurides are 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, and Lu2Te3.

[0453] Alkali metal complexes, alkaline earth metal complexes, and rare earth metal complexes may contain i) one of the ions of alkali metals, alkaline earth metals, and rare earth metals, and ii) ligands attached to the metal ions, such as hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyl oxazole, hydroxyphenyl thiazole, hydroxyphenyl oxadiazole, hydroxyphenyl thiadiazole, hydroxyphenyl pyridine, hydroxyphenyl benzimidazole, hydroxyphenyl benzothiazole, bipyridine, phenanthroline, cyclopentadiene, or any combination thereof.

[0454] The electron injection layer may be composed of: alkali metals, alkaline earth metals, rare earth metals, compounds containing alkali metals, compounds containing alkaline earth metals, compounds containing rare earth metals, alkali metal complexes, alkaline earth metal complexes, rare earth metal complexes, or any combination thereof, or may further contain an organic material (e.g., a compound represented by Formula 601).

[0455] In embodiments, 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, alkaline earth metal, rare earth metal, or any combination thereof. In embodiments, the electron injection layer may be a KI:Yb co-deposited layer or an RbI:Yb co-deposited layer.

[0456] When the electron injection layer further contains organic materials, 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 can be uniformly or non-uniformly dispersed in the matrix containing organic materials.

[0457] The thickness of the electron injection layer can be approximately to approximately For example, the thickness of the electron injection layer can be approximately to approximately When the thickness of the electron injection layer is within the range described above, the electron injection layer can have satisfactory electron injection characteristics without a significant increase in driving voltage.

[0458] [Second electrode 150]

[0459] The second electrode 150 may be located on the intermediate layer 130 having such a structure. The second electrode 150 may be a cathode for an electron injection electrode, and may be made of metals, alloys, conductive compounds or any combination thereof, each having a low work function.

[0460] The second electrode 150 may contain at least one element selected from 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 combinations thereof. The second electrode 150 may be a transmission electrode, a semi-transmission electrode, or a reflection electrode.

[0461] The second electrode 150 may have a single-layer structure or a multi-layer structure including two or more layers.

[0462] [Overlay]

[0463] The first cover layer may be located outside the first electrode 110, and / or the second cover layer may be located outside the second electrode 150. The light-emitting device 10 may have a structure in which the first cover layer, the first electrode 110, the intermediate layer 130, and the second electrode 150 are stacked in this predetermined order, or a structure in which the first cover layer, the first electrode 110, the intermediate layer 130, the second electrode 150, and the second cover layer are stacked in this predetermined order.

[0464] The light generated in the emitting layer of the intermediate layer 130 of the light-emitting device 10 can be emitted to the outside through the first electrode 110 (which is a semi-transparent electrode or a transmissive electrode) and the first cover layer, and the light generated in the emitting layer of the intermediate layer 130 of the light-emitting device 10 can be emitted to the outside through the second electrode 150 (which is a semi-transparent electrode or a transmissive electrode) and the second cover layer.

[0465] The first and second capping layers can increase the external light emission efficiency based on the principle of constructive interference. Therefore, the light emission efficiency of the light-emitting device 10 is increased, thereby improving the light emission efficiency of the light-emitting device 10.

[0466] The first and second capping layers may each contain a material having a refractive index greater than or equal to about 1.6 (at 589 nm).

[0467] The first and second covering layers can each be independently an organic covering layer containing organic materials, an inorganic covering layer containing inorganic materials, or a composite covering layer containing both organic and inorganic materials.

[0468] At least one of the first and second capping layers may independently comprise a carbocyclic compound, a heterocyclic compound, an amine-containing compound, a porphyrin derivative, a phthalocyanine derivative, a naphthyl phthalocyanine derivative, an alkali metal complex, an alkaline earth metal complex, or a combination thereof. The carbocyclic compound, heterocyclic compound, and amine-containing compound may optionally be substituted with substituents containing O, N, S, Se, Si, F, Cl, Br, I, or any combination thereof.

[0469] In the implementation scheme, at least one of the first capping layer and the second capping layer may each independently contain a compound containing an amine group.

[0470] In the implementation scheme, at least one of the first capping layer and the second capping layer may each independently contain a compound represented by formula 201, a compound represented by formula 202, or any combination thereof.

[0471] In the implementation scheme, at least one of the first capping layer and the second capping layer may each independently contain one of compounds HT28 to HT33, one of compounds CP1 to CP6, β-NPB, or any combination thereof:

[0472]

[0473] [Electronic Devices]

[0474] The light-emitting device can be included in various electronic devices. In this embodiment, the electronic device including the light-emitting device can be a light-emitting device, a verification device, etc.

[0475] In addition to the light-emitting device, the electronic device (e.g., the light-emitting device) may further include a color filter, a color conversion layer, or a color filter and a color conversion layer. The color filter and / or color conversion layer may be located in at least one direction of travel of the light emitted from the light-emitting device. In embodiments, the light emitted from the light-emitting device may be blue light or white light. The light-emitting device may be the same as described above. In embodiments, the color conversion layer may comprise quantum dots. Quantum dots may be, for example, quantum dots as described herein.

[0476] An electronic device may include a first substrate. The first substrate includes sub-pixels, color filters include color filter regions corresponding to the sub-pixels respectively, and a color conversion layer may include color conversion regions corresponding to the sub-pixels respectively.

[0477] A pixel-defining membrane can be located between sub-pixels to define each of the sub-pixels.

[0478] The color filter may further include a color filter region and a light-blocking pattern located between adjacent color filter regions in the color filter region, and the color conversion layer may further include a color conversion region and a light-blocking pattern located between adjacent color conversion regions in the color conversion region.

[0479] The color filter region (or color conversion region) may include 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. In an embodiment, 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. In an embodiment, the color filter region (or color conversion region) may contain quantum dots. The first region may contain red quantum dots, the second region may contain green quantum dots, and the third region may not contain quantum dots. The quantum dots are the same as those described in the specification. Each of the first, second, and / or third regions may further contain a scatterer.

[0480] In this embodiment, the light-emitting device can emit first light, a first region can absorb the first light to emit a first color light, a second region can absorb the first light to emit a second color light, and a third region can absorb the first light to emit a third color light. In this respect, the first, second, and third color lights can have different maximum emission wavelengths from each other. The first light can be blue light, the first color light can be red light, the second color light can be green light, and the third color light can be blue light.

[0481] In addition to the light-emitting device 10 described above, the electronic device may further include a thin-film transistor. The thin-film transistor may include a source electrode, a drain electrode, and an active layer, wherein either the source electrode or the drain electrode may be electrically connected to either the first electrode or the second electrode of the light-emitting device.

[0482] Thin-film transistors may further include gate electrodes, gate insulating layers, etc.

[0483] The active layer can contain crystalline silicon, amorphous silicon, organic semiconductors, oxide semiconductors, etc.

[0484] The electronic device may further include a sealing portion for sealing the light-emitting device. The sealing portion may be located between the color filter and / or color conversion layer and the light-emitting device. The sealing portion allows light from the light-emitting device 10 to be emitted to the outside while simultaneously preventing ambient air and moisture from penetrating into the light-emitting device 10. 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 at least one of an organic layer and an inorganic layer. When the sealing portion is a thin-film encapsulation layer, the electronic device may be flexible.

[0485] In addition to color filters and / or color conversion layers, various functional layers may be further positioned on the sealing portion, depending on the application of the electronic device. Functional layers may include a touchscreen layer, a polarization layer, etc. The touchscreen layer may be a pressure-sensitive touchscreen layer, a capacitive touchscreen layer, or an infrared touchscreen layer. The verification device may be, for example, a biometric verification device for verifying an individual using biometric information from a biometric body (e.g., fingertip, pupil, etc.).

[0486] In addition to the light-emitting device, the verification device may further include a biometric information collector.

[0487] Electronic devices can be used in various displays, light sources, lighting equipment, personal computers (e.g., mobile personal computers), mobile phones, digital cameras, electronic notebooks, electronic dictionaries, video game consoles, medical instruments (e.g., electronic thermometers, blood pressure monitors, blood glucose meters, pulse measuring devices, pulse wave measuring devices, electrocardiogram displays, ultrasound diagnostic equipment, or endoscope displays), fish finders, various measuring instruments, meters (e.g., instruments for vehicles, aircraft, and ships), projectors, etc.

[0488] [ Figure 2 and Figure 3 [Description]

[0489] Figure 2 This is a schematic cross-sectional view illustrating a light-emitting device according to an embodiment of the present disclosure; and

[0490] Figure 2 The light-emitting device includes a substrate 100, a thin-film transistor (TFT), a light-emitting device, and a package 300 that seals the light-emitting device.

[0491] The substrate 100 may be a flexible substrate, a glass substrate, or a metal substrate. A buffer layer 210 may be located on the substrate 100. The buffer layer 210 prevents impurities from penetrating through the substrate 100 and may provide a flat surface on the substrate 100.

[0492] The TFT can be located on the buffer layer 210. The TFT may include an active layer 220, a gate electrode 240, a source electrode 260, and a drain electrode 270.

[0493] The active layer 220 may contain inorganic semiconductors (such as silicon or polysilicon), organic semiconductors or oxide semiconductors, and may include source region, drain region and channel region.

[0494] A gate insulating film 230 for insulating the active layer 220 from the gate electrode 240 may be located on the active layer 220, and the gate electrode 240 may be located on the gate insulating film 230.

[0495] Interlayer insulating film 250 may be located on gate electrode 240. Interlayer insulating film 250 is located between gate electrode 240 and source electrode 260 to insulate gate electrode 240 from source electrode 260, and is located between gate electrode 240 and drain electrode 270 to insulate gate electrode 240 from drain electrode 270.

[0496] The source electrode 260 and the drain electrode 270 may be located on the interlayer insulating film 250. The interlayer insulating film 250 and the gate insulating film 230 may be formed to expose the source and drain regions of the active layer 220, and the source electrode 260 and the drain electrode 270 may be positioned to contact the exposed portions of the source and drain regions of the active layer 220.

[0497] The TFT can be electrically connected to a light-emitting device to drive the light-emitting device, and can be covered 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 device is provided on the passivation layer 280. The light-emitting device includes a first electrode 110, an intermediate layer 130, and a second electrode 150.

[0498] The first electrode 110 may be located on the passivation layer 280. The passivation layer 280 does not completely cover the drain electrode 270 and exposes a portion of the drain electrode 270, and the first electrode 110 may be connected to the exposed portion of the drain electrode 270.

[0499] A pixel defining layer 290 containing insulating material may be located on the first electrode 110. The pixel defining layer 290 may expose certain areas of the first electrode 110, and an intermediate layer 130 may be formed in the exposed areas of the first electrode 110. The pixel defining layer 290 may be an organic film based on polyimide or polyacrylamide. Although in Figure 2 Although not shown, at least some layers of intermediate layer 130 may extend beyond the upper part of pixel-defined layer 290 and thus may be in the form of a common layer.

[0500] The second electrode 150 may be located 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.

[0501] The encapsulation portion 300 may be located on the cover layer 170. The encapsulation portion 300 may be located on the light-emitting device and protect the light-emitting device from moisture or oxygen. The encapsulation portion 300 may include: an inorganic film comprising silicon nitride (SiNx) (where x is a real number from 0.5 to 3), silicon oxide (SiOx) (where x is a real number from 0.5 to 3), indium tin oxide, indium zinc oxide, or a combination thereof; an organic film comprising polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane, acrylic resin (e.g., polymethyl methacrylate or polyacrylic acid), epoxy-based resin (e.g., aliphatic glycidyl ether (AGE)), or a combination thereof; or a combination of an inorganic film and an organic film.

[0502] Figure 3 This is a schematic cross-sectional view illustrating an embodiment of a light-emitting device according to the present disclosure.

[0503] Figure 3 Light-emitting devices and Figure 2The light-emitting device is the same, but the light-blocking pattern 500 and the functional area 400 are additionally located on the encapsulation portion 300. The functional area 400 may be a color filter area, a color conversion area, or a combination of a color filter area and a color conversion area. In the embodiment, it includes... Figure 3 The light-emitting devices in the light-emitting equipment can be light-emitting devices connected in series.

[0504] [Preparation Method]

[0505] Layers constituting hole transport regions, emission regions, and electron transport regions can be formed in a specific region using one or more suitable methods selected from vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, inkjet printing, laser printing, and laser-induced thermal imaging.

[0506] When forming layers constituting hole transport regions, emitter regions, and electron transport regions via vacuum deposition, by considering the materials to be included in the layers to be formed and the structure of the layers to be formed, deposition temperatures of approximately 100°C to approximately 500°C and approximately 10 -8 To about 10 -3 The vacuum degree and about to approximately Deposition occurs at a certain deposition rate.

[0507] [Definition of the term]

[0508] As used in this article, the term "C3-C" 60 A "carbocyclic group" refers to a cyclic group containing only carbon as the cyclic atom and having three to sixty carbon atoms. In some embodiments, C3-C 60 The carbocyclic group can be C3-C 30 Carbocyclic groups, C3-C 24 Carbocyclic groups or C3-C 18 Carbocyclic group. As used in this article, "C1-C..." 60 A "heterocyclic group" refers to a cyclic group having one to sixty carbon atoms (e.g., one to thirty, one to twenty-four, or one to eighteen carbon atoms) and further comprising heteroatoms other than carbon. (C3-C) 60 Carbocyclic groups and C1-C 60 The heterocyclic group can be a monocyclic group, each consisting of a single ring, or a polycyclic group in which two or more rings are fused together. In the embodiment, C1-C 60 The number of cyclic atoms in a heterocyclic group can range from 3 to 61.

[0509] As used in this article, the term "cyclic group" includes C3-C 60 Carbocyclic groups and C1-C 60Heterocyclic groups.

[0510] As used in this article, “π-electron-rich C3-C” 60 A "cyclic group" refers to a cyclic group having three to sixty carbon atoms and not containing *-N=*' as a cyclic moiety. In some embodiments, π-electron-rich C3-C 60 Cyclic groups can be π-electron-rich C3-C 30 Cyclic groups, π-electron-rich C3-C 24 Cyclic groups or π-electron-rich C3-C 18 Cyclic groups. As used herein, "C1-C containing π-electron-deficient nitrogen groups". 60 A "cyclic group" refers to a heterocyclic group having one to sixty carbon atoms and containing *-N=*' as the cyclic moiety. In some embodiments, the C1-C group contains nitrogen lacking π electrons. 60 The cyclic group can be a C1-C group of nitrogen containing π-electron-deficient nitrogen. 30 Cyclic groups, C1-C of nitrogen containing π-electron-deficient nitrogen 24 Cyclic groups or C1-C atoms containing nitrogen lacking π electrons 18 Cyclic groups.

[0511] For example, C3-C 60 The carbocyclic group can be i) group T1 or ii) a fused cyclic group in which two or more groups T1 are fused together (e.g., cyclopentadienyl group, adamantyl group, norbornel group, phenyl group, pentanene group, naphthyl group, chamomile ring group, indole group, acenaphthene group, phenanthrene group, phenanthrene group, anthracene group, fluoranthene group, benzo[a]phenanthrene group, pyrene group, etc.). Groups, perylene groups, pentaphenyl groups, heptadene groups, tetraphenyl groups, styrene groups, hexaphenyl groups, pentaphenyl groups, rutin groups, styrene groups, ovoid groups, indene groups, fluorene groups, spiro-difluorene groups, benzo[a]fluorene groups, ind[a]phenanthrene groups, or ind[a]anthracene groups.

[0512] C1-C 60The heterocyclic group can be i) group T2, ii) a fused cyclic group in which two or more groups T2 are fused together, or iii) a fused cyclic group in which at least one group T2 and at least one group T1 are fused together (e.g., pyrrole group, thiophene group, furan group, indole group, benzo[a]indole group, naphtho[a]indole group, isoindole group, benzo[a]isoindole group, naphtho[a]isoindole group, benzo[a]thiophene ... Thiophene group, benzofuran group, carbazole group, dibenzothiophene group, dibenzothiophene group, dibenzofuran group, indole-carbazole group, indole-carbazole group, benzofuran-carbazole group, benzothiophene-carbazole group, benzothiophene-carbazole group, benzoindole-carbazole group, benzocarbazole group, benzonaphthiophene group, benzonaphthiophene group, benzofuran-dibenzofuran group, benzofuran-dibenzofuran group Benzothiophene group, benzothiophene dibenzothiophene group, pyrazole group, imidazole group, triazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiazole group, thiazolyldiazole group, benzopyrazole group, benzimidazole group, benzooxazole group, benziisooxazole group, benzothiazole group, benziisothiazole group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group Benzoquinoline group, benzoisoquinoline group, quinoxaloline group, benzoquinoxaloline group, quinazoline group, benzoquinazoline group, phenanthrene group, cyclophosphine group, phthalazine group, naphthidine group, imidazopyridine group, imidazopyrimidine group, imidazotriazine group, imidazopyrazine group, imidazopyridazine group, azacarbazole group, azafluorene group, azadibenzothiophene group, azadibenzothiophene group, or azadibenzofuran group).

[0513] C3-C rich in π electrons 60 The cyclic group can be i) group T1, ii) a fused cyclic group in which two or more groups T1 are fused together, iii) group T3, iv) a fused cyclic group in which two or more groups T3 are fused together, or v) a fused cyclic group in which at least one group T3 and at least one group T1 are fused together (e.g., C3-C). 60Carbocyclic group, pyrrole group, thiophene group, furan group, indole group, benzoindole group, naphthoindole group, isoindole group, benzoisoindole group, naphthoisoindole group, benzothiophene group, benzofuran group, carbazole group, dibenzothiophene group, dibenzothiophene group, dibenzofuran group, indole-carbazole group, indole-carbazole group, benzofuran-carbazole group, benzothiophene-carbazole group, benzothiophene-carbazole group, benzoindole-carbazole group, benzocarbazole group, benzonaphthiophene group, benzonaphthiophene group, benzofuran-dibenzofuran group, benzofuran-dibenzothiophene group or benzothiophene-dibenzothiophene group).

[0514] C1-C containing nitrogen lacking π electrons 60 The cyclic group can be i) group T4, ii) a fused cyclic group in which two or more groups T4 are fused together, iii) a fused cyclic group in which at least one group T4 and at least one group T1 are fused together, iv) a fused cyclic group in which at least one group T4 and at least one group T3 are fused together, or v) a fused cyclic group in which at least one group T4, at least one group T1 and at least one group T3 are fused together (e.g., pyrazole group, imidazole group, triazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiazole group, thiaazole group, benzopyrazole group, benzimazole group). Azolium group, benzoxazole group, benzoisoxazole group, benzothiazole group, benzoisothiazole group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, benzoquinoline group, benzoisoquinoline group, quinoxaline group, benzoquinoxaline group, quinazoline group, benzoquinazoline group, phenanthrene group, cinnamoline group, phthalazine group, naphthidine group, imidazopyridine group, imidazopyrimidine group, imidazotriazine group, imidazopyrazine group, imidazopyridazine group, imidazopyridazine group, azacarbazole group, azafluorene group, azadibenzothiophene group, azadibenzothiophene group or azadibenzofuran group).

[0515] Group T1 can be a cyclopropane group, cyclobutane group, cyclopentane group, cyclohexane group, cycloheptane group, cyclooctane group, cyclobutene group, cyclopentene group, cyclopentadienyl group, cyclohexene group, cyclohexadienyl group, cycloheptene group, adamantane group, norbornyl group (or bicyclo[2.2.1]heptane group), norbornene group, bicyclo[1.1.1]pentane group, bicyclo[2.1.1]hexane group, bicyclo[2.2.2]octane group or phenyl group.

[0516] Group T2 can be a furan group, thiophene group, 1H-pyrrole group, thiorrole group, borocyclopentadienyl group, 2H-pyrrole group, 3H-pyrrole group, imidazole group, pyrazole group, triazole group, tetraazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiazole group, thiadiazole group, azirthiazole group, azirboroxadienyl group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, or tetraazine group.

[0517] Group T3 can be a furan group, a thiophene group, a 1H-pyrrole group, a thiophene group, or a borocyclopentadiene group.

[0518] The group T4 can be a 2H-pyrrole group, a 3H-pyrrole group, an imidazole group, a pyrazole group, a triazole group, a tetraazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an azathirrole group, an azaboranecyclopentadiene group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, or a tetraazine group.

[0519] As used in this article, "cyclic group, C3-C" 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, π-electron-rich C3-C 60 Cyclic groups or C1-C atoms containing nitrogen lacking π electrons 60 "Cyclic group" refers to a group, monovalent group, or polyvalent group (e.g., divalent, trivalent, tetravalent, etc.) fused with a cyclic group according to the structure described by the corresponding term. In embodiments, "phenyl group" can be a benzo[a] group, phenyl group, phenylene group, etc., which can be readily understood by those skilled in the art based on the structure of a formula including "phenyl group".

[0520] In the implementation plan, the unit price is C3-C. 60 Carbocyclic groups and monovalent C1-C 60 Examples of heterocyclic groups are C3-C. 10 Cycloalkyl groups, C1-C 10 Heterocyclic alkyl groups, C3-C 10 cycloalkenyl groups, C1-C 10 Heterocyclic alkenyl groups, C6-C 60 aryl group, C1-C 60 Heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heterocyclic groups, and divalent C3-C 60 Carbocyclic groups and divalent C1-C 60 Examples of heterocyclic groups are C3-C. 10 Cycloalkyl groups, C1-C 10 heterocyclic alkyl groups, C3-C10 Cycloalkylene groups, C1-C 10 heterocyclic alkenyl groups, C6-C 60 arylene groups, C1-C 60 Hypoaryl groups, divalent non-aromatic fused polycyclic groups, and divalent non-aromatic fused heterocyclic groups.

[0521] As used in this article, the term "C1-C" 60 "alkyl group" refers to a monovalent group of a straight-chain or branched aliphatic hydrocarbon having 1 to 60 carbon atoms, and examples include methyl groups, ethyl groups, n-propyl groups, isopropyl groups, n-butyl groups, sec-butyl groups, isobutyl groups, tert-butyl groups, n-pentyl groups, tert-pentyl groups, neopentyl groups, isopentyl groups, sec-pentyl groups, 3-pentyl groups, sec-isopentyl groups, n-hexyl groups, isohexyl groups, sec-hexyl groups, tert-hexyl groups, n-heptyl groups, isoheptyl groups, sec-heptyl groups, tert-heptyl groups, n-octyl groups, isooctyl groups, sec-octyl groups, tert-octyl groups, n-nonyl groups, isononyl groups, sec-nonyl groups, tert-nonyl groups, n-decyl groups, isodel groups, sec-decyl groups, and tert-decyl groups. In some embodiments, C1-C 60 Alkyl groups can be C1-C 30 Alkyl groups, C1-C 20 alkyl groups or C1-C 10 Alkyl groups.

[0522] As used in this article, the term "C1-C" 60 "alkylene group" refers to a group that has a C1-C2 bond structure. 60 Divalent groups with the same structure as alkyl groups.

[0523] As used in this article, the term "C2-C" 60 "Alkenyl group" refers to the group located at C2-C. 60 The alkyl group has at least one carbon-carbon double bond at its middle or end, and examples include vinyl groups, propenyl groups, and butenyl groups. In some embodiments, C2-C 60 The alkenyl group can be C2-C 30 alkenyl groups, C2-C 20 alkenyl groups or C2-C 10 Alkenyl group. As used in this article, "C2-C" 60 "Ideinyl group" refers to a group that has a C2-C... 60 Divalent groups with the same structure as alkenyl groups.

[0524] As used in this article, the term "C2-C" 60 "Alkyne group" refers to the group located at C2-C. 60The alkyl group is a monovalent hydrocarbon group having at least one carbon-carbon triple bond at its middle or end, and examples include ethynyl and propynyl groups. In some embodiments, C2-C 60 The alkynyl group can be C2-C 30 alkynyl group, C2-C 20 alkynyl group or C2-C 10 Alkynyl group. As used in this article, "C2-C" 60 "Imyynyl group" refers to a group that has a C2-C... 60 A divalent group with the same structure as the alkynyl group.

[0525] As used in this article, the term "C1-C" 60 "Alkoxy group" refers to the group consisting of -OA 101 (where A) 101 It is C1-C 60 Alkyl groups are monovalent groups, and examples of them include methoxy groups, ethoxy groups and isopropoxy groups.

[0526] As used in this article, the term "C3-C" 10 "Cycloalkyl group" refers to a monovalent saturated hydrocarbon cyclic group having 3 to 10 carbon atoms, and examples of such groups are cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornel (or bicyclic [2.2.1]heptyl), bicyclic [1.1.1]pentyl, bicyclic [2.1.1]hexyl, and bicyclic [2.2.2]octyl. As used herein, the term "C3-C" is also relevant. 10 "Cycloalkylene group" refers to a group that has a C3-C6 bond structure. 10 A divalent group with the same structure as a cycloalkyl group.

[0527] As used in this article, the term "C1-C" 10 "Heterocyclic alkyl group" refers to a monovalent cyclic group that further comprises at least one heteroatom other than a carbon atom (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4 or 5 heteroatoms) as a cyclic atom and has 1 to 10 carbon atoms, and examples are 1,2,3,4-oxatriazole alkyl groups, tetrahydrofuranyl groups, and tetrahydrothiophenyl groups. The term "C1-C" as used herein is also used. 10 "Heterocyclic alkyl groups" refers to groups with C1-C2 groups. 10 Divalent groups with the same structure as heterocyclic alkyl groups.

[0528] As used in this article, the term "C3-C" 10"Cycloalkenyl group" refers to a monovalent cyclic group having 3 to 10 carbon atoms and at least one carbon-carbon double bond in its ring and lacking aromaticity, and non-limiting examples include cyclopentenyl, cyclohexenyl, and cycloheptenyl groups. As used herein, the term "C3-C" is also relevant. 10 "Iridyl group" refers to a group that has a C3-C6 bond structure. 10 A divalent group with the same structure as the cycloalkenyl group.

[0529] As used in this article, the term "C1-C" 10 A "heterocyclic alkenyl group" refers to a monovalent cyclic group having at least one heteroatom (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4 or 5 heteroatoms) other than carbon atoms as cyclic atoms, 1 to 10 carbon atoms, and at least one double bond in its cyclic structure. C1-C 10 Examples of heterocyclic alkenyl groups include 4,5-dihydro-1,2,3,4-oxatriazolyl, 2,3-dihydrofuranyl, and 2,3-dihydrothiophenyl groups. As used herein, the term "C1-C..." 10 "Heterocyclic alkenyl group" refers to a group that has a C1-C2 bond structure. 10 A divalent group with the same structure as a heterocyclic alkenyl group.

[0530] As used in this article, the term "C6-C" 60 "Aryl group" refers to a monovalent group having a carbocyclic aromatic system containing 6 to 60 carbon atoms, and as used herein, "C6-C..." 60 "Aromatic group" refers to a divalent group that has a carbocyclic aromatic system containing 6 to 60 carbon atoms. (C6-C) 60 Examples of aryl groups include phenyl groups, pentanenyl groups, naphthyl groups, chamomile cycloyl groups, indoleyl groups, acenaphthenic groups, phenanthreneyl groups, anthraceneyl groups, fluoranthraceneyl groups, benzo[a]phenanthreneyl groups, and pyreneyl groups. The compounds include alkyl groups, perylyl groups, pentaphenyl groups, heptalenyl groups, tetraphenyl groups, arbutinyl groups, hexaphenyl groups, pentaphenyl groups, rutinyl groups, keratinyl groups, and ovoidyl groups. In some embodiments, C6-C... 60 The aryl group can be C6-C. 30 aryl group, C6-C 24 aryl group or C6-C 18 Aryl group. When C6-C 60 aryl groups and C6-C 60 When each of the aryl groups comprises two or more rings, the two or more rings may be fused together.

[0531] As used in this article, the term "C1-C" 60A "heteroaryl group" refers to a monovalent group having a heterocyclic aromatic system containing at least one heteroatom (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4 or 5 heteroatoms) and 1 to 60 carbon atoms as cyclic atoms. As used herein, the term "C1-C..." 60 A "hybrid aryl group" refers to a divalent group having a heterocyclic aromatic system containing at least one heteroatom (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4 or 5 heteroatoms) and 1 to 60 carbon atoms as cyclic atoms. C1-C 60 Examples of heteroaryl groups are pyridinyl groups, pyrimidinyl groups, pyrazinyl groups, pyridazinyl groups, triazinyl groups, quinolinyl groups, benzo[a]quinolinyl groups, isoquinolinyl groups, benzo[a]isoquinolinyl groups, quinoxalinyl groups, benzo[a]quinoxalinyl groups, quinazolinyl groups, benzo[a]quinazolinyl groups, cyclophosphinyl groups, phenanthrolinel groups, phthalazinyl groups, and naphthidyl groups. In some embodiments, C1-C 60 The heteroaryl group can be C1-C 30 heteroaryl groups, C1-C 24 heteroaryl groups or C1-C 18 heteroaryl groups. When C1-C 60 heteroaryl groups and C1-C 60 When each of the heteroaryl groups comprises two or more rings, the two or more rings may be fused together.

[0532] As used herein, the term "monovalent nonaromatic fused polycyclic group" refers to a monovalent group (e.g., having 8 to 60 carbon atoms, such as 8 to 30 or 8 to 24 carbon atoms) having two or more rings fused together, with only carbon atoms as cyclic atoms, and lacking aromaticity throughout its molecular structure. Examples of monovalent nonaromatic fused polycyclic groups are indenyl groups, fluorenyl groups, spiro-difluorenyl groups, benzo[a]fluorenyl groups, indo[a]phenanthrene groups, and indo[a]anthrayl groups. As used herein, the term "divalent nonaromatic fused polycyclic group" refers to a divalent group having the same structure as a monovalent nonaromatic fused polycyclic group.

[0533] As used herein, the term "monovalent nonaromatic fused heterocyclic group" refers to a monovalent group (e.g., having 1 to 60 carbon atoms, such as 1 to 30 or 1 to 24 carbon atoms) having two or more rings fused together, at least one heteroatom other than carbon atoms (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4 or 5 heteroatoms) as cyclic atoms and being non-aromatic throughout its molecular structure. Examples of monovalent non-aromatic fused heterocyclic groups include pyrrolyl groups, thiophenyl groups, furanyl groups, indole groups, benzoindole groups, naphthoindole groups, isoindole groups, benzoisoindole groups, naphthoisoindole groups, benzothiolyl groups, benzothiphenyl groups, benzofuranyl groups, carbazole groups, dibenzothiolyl groups, dibenzothiphenyl groups, dibenzofuranyl groups, azacarbazoleyl groups, azafluorenyl groups, azadibenzothiolyl groups, azadibenzothiphenyl groups, azadibenzofuranyl groups, pyrazolyl groups, imidazoleyl groups, triazoleyl groups, tetraazoleyl groups, oxazolyl groups, isoxazolyl groups, thiolyl groups, isothiazolyl groups, and oxadiazoleyl groups. Thiadiazolyl group, benzopyrazolyl group, benzoimidazolyl group, benzooxazolyl group, benzothiazolyl group, benzooxadiazolyl group, benzothiadiazolyl group, imidazopyridyl group, imidazopyrimidine group, imidazotriazinyl group, imidazopyrazinyl group, imidazopyridazinyl group, indolecarbazoyl group, indolocarbazoyl group, benzofuranocarbazoyl group, benzothiophenocarbazoyl group, benzothiophenocarbazoyl group, benzoindolocarbazoyl group, benzocarbazoyl group, benzonaphthiophenyl group, benzonaphthiophenyl group, benzofuranodibenzofuranyl group, benzofuranodibenzothiophenyl group and benzothiophenodibenzothiophenyl group. As used in this article, the term "divalent nonaromatic fused heterocyclic group" refers to a divalent group having the same structure as a monovalent nonaromatic fused heterocyclic group.

[0534] As used in this article, the term "C6-C" 60 "Aryloxy group" refers to -OA 102 (where A) 102 It is C6-C 60 (aryl group), and as used herein by the term "C6-C" 60 "Aryl thio group" refers to -SA 103 (where A) 103 It is C6-C 60 (aryl group).

[0535] As used in this article, the term "R" 10a " refers to:

[0536] Deuterium (-D), -F, -Cl, -Br, -I, hydroxyl group, cyano group or nitro group;

[0537] Each of the following groups is unsubstituted or replaced: -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group, C6-C 60 aryl thioyl groups, -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 C1-C substituted by (or any combination thereof) 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group or C1-C 60 alkoxy group;

[0538] Each of the following groups is unsubstituted or replaced: -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1-C 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group, C1-C 60 alkoxy group, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group, C6-C 60 aryl thioyl groups, -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 C3-C replaced by any combination thereof 60 Carbocyclic groups, C1-C 60Heterocyclic groups, C6-C 60 aryloxy group or C6-C 60 aryl thioyl group; or

[0539] -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 ).

[0540] As used in this article, Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 These can be, 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 groups; or unsubstituted or deuterated, -F, cyano groups, C1-C 60 Alkyl groups, C1-C 60 C3-C substituted with alkoxy groups, phenyl groups, biphenyl groups, or any combination thereof 60 Carbocyclic groups or C1-C 60 Heterocyclic groups.

[0541] As used in this article, the term "heteroatom" refers to any atom other than a carbon atom. Examples of heteroatoms are O, S, N, P, Si, B, Ge, Se, and any combination thereof.

[0542] As used herein, the term "Ph" refers to a phenyl group, "Me" refers to a methyl group, "Et" refers to an ethyl group, and "tert-Bu" or "Bu" refers to a tert-Bu group. t "" refers to the tert-butyl group, and as used herein, the term "OMe" refers to the methyl methacrylate group.

[0543] As used in this article, the term "biphenyl group" refers to a "phenyl group substituted with a phenyl group." In other words, a "biphenyl group" is a group with a C6-C6 bond. 60The aryl group is a substituted phenyl group.

[0544] As used in this article, the term "terphenyl group" refers to a "phenyl group substituted with a biphenyl group." In other words, a "terphenyl group" is a phenyl group with a C6-C substituted group. 60 C6-C substituted with aryl group 60 The aryl group is a substituted phenyl group.

[0545] Unless otherwise defined, as used herein, * and *' each refer to the binding site with the adjacent atom in the corresponding formula.

[0546] The compounds according to the embodiments and the light-emitting devices according to the embodiments will be described below with reference to synthesis examples and examples. The phrase "using B instead of A" used to describe the synthesis examples means using an equimolar amount of B instead of A.

[0547] [Example]

[0548] 1. First Implementation Plan

[0549] Example 1-1

[0550] As the anode, Corning 15Ω / cm 2 The ITO glass substrate was cut to a size of 50mm × 50mm × 0.7mm, ultrasonicated with isopropanol and pure water for 5 minutes each, and cleaned by exposure to ultraviolet light and ozone for 30 minutes. The ITO glass substrate was then fed into a vacuum deposition apparatus.

[0551] HAT-CN was vacuum deposited onto an ITO anode formed on a glass substrate to form a structure with... A hole injection layer of a certain thickness was formed, and 4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB) was vacuum-deposited onto the hole injection layer to form a layer with [missing information]. A hole transport layer of a certain thickness.

[0552] TCTA was vacuum-deposited onto the hole transport layer to form a structure with... A launch auxiliary layer of a certain thickness.

[0553] The host material 1 and dopant 1 were co-deposited on the emission-assisted layer at a weight ratio of 97:3 to form a layer with... A first emitter layer of thickness is formed, and the body 2-1 and dopant 2 are co-deposited on the first emitter layer at a weight ratio of 99:1 to form a first emitter layer with a thickness of 1. The second emission layer has a thickness of [missing information].

[0554] Then, T2T is deposited on the second emitter layer to form a layer with A hole-blocking layer of a certain thickness was formed, and TPM-TAZ and Liq were co-deposited on the hole-blocking layer at a weight ratio of 5:5 to form a hole-blocking layer with a certain thickness. An electron transport layer of a certain thickness is formed, and Yb is deposited on the electron transport layer to form an electron transport layer with a certain thickness. An electron-injected layer of a certain thickness.

[0555] Ag and Mg were co-deposited on the electron-injected layer at a weight ratio of 1:9 to form a layer with... Electrodes of a certain thickness are deposited, and CPL is deposited on the electrodes to form a structure with... A thick covering layer is applied to complete the manufacturing of the light-emitting device.

[0556] Examples 1-2 to Examples 1-4

[0557] The light-emitting device was manufactured in the same manner as in Examples 1-1, except that in forming the first and second emitting layers, the compounds listed in Table 1 were deposited at the deposition concentrations and layer thicknesses listed in Table 1.

[0558] Comparative Example 1

[0559] The light-emitting device is manufactured in the same manner as in Examples 1-1, but the body 1 and dopant 1 are co-deposited at a weight ratio of 97:3 to form a light-emitting device. A transmission layer of a certain thickness is used instead of forming the first and second transmission layers.

[0560] Comparative Example 2

[0561] The light-emitting device was manufactured in the same manner as in Comparative Example 1, but in forming the emitting layer, the host 1 and the dopant 2 were co-deposited at a weight ratio of 99:1 to form a light-emitting layer. The emission layer.

[0562] 2. Second Implementation Plan

[0563] Example 2-1

[0564] Formation of the first light-emitting unit

[0565] As the anode, Corning 15Ω / cm 2 The ITO glass substrate was cut to a size of 50mm × 50mm × 0.7mm, ultrasonicated with isopropanol and pure water for 5 minutes each, and cleaned by exposure to ultraviolet light and ozone for 30 minutes. The ITO glass substrate was then fed into a vacuum deposition apparatus.

[0566] HATCN is vacuum deposited onto an ITO anode formed on an ITO glass substrate to form a structure with... A hole injection layer of a certain thickness is formed, and NPB is vacuum deposited on the hole injection layer to form a layer with [missing information]. A hole transport layer of a certain thickness.

[0567] TCTA was vacuum-deposited onto the hole transport layer to form a structure with... A launch auxiliary layer of a certain thickness.

[0568] The host material 1 and dopant 1 were co-deposited on the emission-assisted layer at a weight ratio of 97:3 to form a layer with... A first emitter layer of thickness is formed, and the body 2-1 and dopant 2 are co-deposited on the first emitter layer at a weight ratio of 98:2 to form a first emitter layer with a thickness of 1. The second emission layer has a thickness of [missing information].

[0569] Then, T2T is deposited on the second emitter layer to form a layer with A hole-blocking layer of a certain thickness was formed, and TPM-TAZ and Liq were co-deposited on the hole-blocking layer at a weight ratio of 5:5 to form a hole-blocking layer with a certain thickness. An electron transport layer of a certain thickness.

[0570] CBP and Li were co-deposited on the electron transport layer in a 5:5 weight ratio to form a layer with... A charge-generating layer of a certain thickness is formed, thereby completing the fabrication of the first light-emitting unit.

[0571] Formation of the second light-emitting unit

[0572] HATCN is vacuum-deposited onto the first light-emitting unit to form a structure with A hole injection layer of a certain thickness is formed, and NPB is vacuum deposited on the hole injection layer to form a layer with [missing information]. A hole transport layer of a certain thickness.

[0573] TCTA was vacuum-deposited onto the hole transport layer to form a structure with... A launch auxiliary layer of a certain thickness.

[0574] The host material 1 and dopant 1 were co-deposited on the emission-assisted layer at a weight ratio of 97:3 to form a layer with... A first emitter layer of thickness is formed, and the body 2-1 and dopant 2 are co-deposited on the first emitter layer at a weight ratio of 98:2 to form a first emitter layer with a thickness of 1. The second emission layer has a thickness of [missing information].

[0575] Then, T2T is deposited on the second emitter layer to form a layer with A hole-blocking layer of a certain thickness was formed, and TPM-TAZ and Liq were co-deposited on the hole-blocking layer at a weight ratio of 5:5 to form a hole-blocking layer with a certain thickness. An electron transport layer of a certain thickness.

[0576] CBP and Li were co-deposited on the electron transport layer in a 5:5 weight ratio to form a layer with... A charge-generating layer of a certain thickness is formed, thereby completing the fabrication of the second light-emitting unit.

[0577] Formation of the third light-emitting unit

[0578] HATCN is vacuum-deposited onto the second light-emitting unit to form a structure with A hole injection layer of a certain thickness is formed, and NPB is vacuum deposited on the hole injection layer to form a layer with [missing information]. A hole transport layer of a certain thickness.

[0579] TCTA was vacuum-deposited onto the hole transport layer to form a structure with... A launch auxiliary layer of a certain thickness.

[0580] The host material 1 and dopant 1 were co-deposited on the emission-assisted layer at a weight ratio of 97:3 to form a layer with... A first emitter layer of thickness is formed, and the body 2-1 and dopant 2 are co-deposited on the first emitter layer at a weight ratio of 98:2 to form a first emitter layer with a thickness of 1. The second emission layer has a thickness of [missing information].

[0581] Then, T2T is deposited on the second emitter layer to form a layer with A hole-blocking layer of a certain thickness was formed, and TPM-TAZ and Liq were co-deposited on the hole-blocking layer at a weight ratio of 5:5 to form a hole-blocking layer with a certain thickness. An electron transport layer of a certain thickness.

[0582] Then, Yb is deposited on the electron transport layer to form a layer with... An electron-injected layer of a certain thickness.

[0583] Ag and Mg were co-deposited on the electron-injected layer at a weight ratio of 1:9 to form a layer with... Electrodes of a certain thickness are deposited, and CPL is deposited on the electrodes to form a structure with... A thick covering layer is applied to complete the fabrication of the third light-emitting unit.

[0584] Example 2-2

[0585] The light-emitting device is manufactured in the same manner as that used in the preparation of Example 2-1, but in the emission layer forming each of the first to third light-emitting units, the main body 1 and dopant 2 are used in a weight ratio of 98:2 to form a light-emitting layer with... The first emitter layer has a thickness of [thickness value missing], and uses body 2-1 and dopant 1 at a weight ratio of 97:3 to form [missing information]. The second emission layer has a thickness of [missing information].

[0586] 3. Third Implementation Plan

[0587] Example 3-1

[0588] Formation of the first light-emitting unit

[0589] The first light-emitting unit is manufactured in the same manner as in Example 2-1.

[0590] Formation of the second light-emitting unit

[0591] The second light-emitting unit is manufactured in the same manner as used in Example 2-1.

[0592] Formation of the third light-emitting unit

[0593] HATCN is vacuum-deposited onto the second light-emitting unit to form a structure with A hole injection layer of a certain thickness is formed, and NPB is vacuum deposited on the hole injection layer to form a layer with [missing information]. A hole transport layer of a certain thickness.

[0594] TCTA was vacuum-deposited onto the hole transport layer to form a structure with... A launch auxiliary layer of a certain thickness.

[0595] The host material 1 and dopant 1 were co-deposited on the emission-assisted layer at a weight ratio of 97:3 to form a layer with... A first emitter layer of thickness is formed, and the body 2-1 and dopant 2 are co-deposited on the first emitter layer at a weight ratio of 99:1 to form a first emitter layer with a thickness of 1. The second emission layer has a thickness of [missing information].

[0596] Then, T2T is deposited on the second emitter layer to form a layer with A hole-blocking layer of a certain thickness was formed, and TPM-TAZ and Liq were co-deposited on the hole-blocking layer at a weight ratio of 5:5 to form a hole-blocking layer with a certain thickness. An electron transport layer of a certain thickness.

[0597] CBP and Li were co-deposited on the electron transport layer in a 1:1 weight ratio to form a layer with... A charge-generating layer of a certain thickness is formed, thereby completing the fabrication of the third light-emitting unit.

[0598] Formation of the fourth light-emitting unit

[0599] HATCN was vacuum-deposited onto the third light-emitting unit to form a structure with... A hole injection layer of a certain thickness is formed, and NPB is vacuum deposited on the hole injection layer to form a layer with [missing information]. A hole transport layer of a certain thickness.

[0600] TCTA was vacuum-deposited onto the hole transport layer to form a structure with... A launch auxiliary layer of a certain thickness.

[0601] TPBI and Irppy3 were co-deposited on the emission-assisted layer at a weight ratio of 95:5 to form a layer with... The thickness of the emission layer.

[0602] Then, TPM-TAZ and Liq were co-deposited on the emitter layer at a weight ratio of 5:5 to form a structure with... An electron transport layer of a certain thickness.

[0603] Then, Yb is deposited on the electron transport layer to form a layer with... An electron-injected layer of a certain thickness.

[0604] Ag and Mg were co-deposited on the electron-injected layer at a weight ratio of 1:9 to form a layer with... Electrodes of a certain thickness are deposited, and CPL is deposited on the electrodes to form a structure with... A thick covering layer is applied to complete the fabrication of the fourth light-emitting unit.

[0605] Example 3-2

[0606] The light-emitting device was manufactured in the same manner as that used in Example 3-1, but in the emitting layer of each of the first to third light-emitting units, the main body 1 and dopant 2 were used in a weight ratio of 98:2 to form a light-emitting layer with... The first emitter layer has a thickness of [thickness missing], and uses body 2-1 and dopant 1 at a weight ratio of 98:2 to form [missing information]. The second emission layer has a thickness of [missing information].

[0607] [Table 1]

[0608]

[0609]

[0610]

[0611]

[0612] In this respect, dopant 1 has LUMO, S1, T1 and ΔE as listed in Table 2 below. ST value:

[0613] [Table 2]

[0614] S1 (Start) LUMO(DPV) T1 (Start) <![CDATA[ΔE ST (eV)]]> Dopant 1 2.8 -2.8 2.65 0.15

[0615] 4. Evaluation Example

[0616] Reference at 10mA / cm 2The characteristics of the light-emitting devices manufactured according to Examples 1-1 to 1-4, Examples 2-1, 2-2, 3-1 and 3-2, and Comparative Examples 1 and 2 were evaluated by measuring the driving voltage and light emission efficiency at the specified current density. The driving voltage of the light-emitting devices was measured using a source meter (Keithley Instrument Inc., 2400 series), and the lifespan (T) was also measured. 97 The evaluation is based on the initial brightness of 100% and the time taken to reach 97% brightness. The evaluation results of the characteristics of the light-emitting device are shown in Table 3 below.

[0617] [Table 3]

[0618]

[0619]

[0620] Referring to Table 3, it is confirmed that compared with the light-emitting devices of Comparative Examples 1 and 2, the light-emitting devices of Examples 1-1 to 1-3 have a longer service life, Example 1-4 has better light emission efficiency, and the light-emitting devices of Examples 2-1, 2-2, 3-1 and 3-2 have better light emission efficiency and longer service life.

[0621] It should be understood that the embodiments described herein are for descriptive purposes only and not for limiting purposes. The description of features or aspects in each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although embodiments have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made herein without departing from the spirit and scope defined by the appended claims.

Claims

1. A light-emitting device, comprising: First electrode; The second electrode facing the first electrode; as well as An intermediate layer is disposed between the first electrode and the second electrode, wherein The intermediate layer includes a first emission layer and a second emission layer disposed between the first emission layer and the second electrode. The first emitter layer comprises a first compound and a second compound. The second emission layer comprises a third compound and a fourth compound. The first compound and the second compound are different from each other. The third compound and the fourth compound are different from each other. The fourth compound includes at least one selected from electron transport compounds and bipolar compounds. The first compound and the third compound are each dopants, and the second compound and the fourth compound are each the host compound. In the first emitter layer, based on 100 parts by weight of the bulk, the amount of dopant is from 0.01 parts by weight to 15 parts by weight. In the second emitter layer, based on 100 parts by weight of the bulk, the amount of dopant is from 0.01 parts by weight to 15 parts by weight, and The first compound comprises a first fluorescent compound, and the third compound comprises a second fluorescent compound satisfying Equation 1, or The first compound includes the second fluorescent compound satisfying Equation 1, and the third compound includes the first fluorescent compound: [Equation 1] ΔΕ ST = S1 - T1 ≤ 0.5 eV In equation 1, S1 is the lowest excited singlet state energy level of the second fluorescent compound, and T1 is the lowest excited triplet energy level of the second fluorescent compound. The second fluorescent compound includes at least one compound represented by one of formulas 4-1 to 4-4 and 4-9: Equation 4-1 Equation 4-2 Equation 4-3 Equation 4-4 Equation 4-9 A 41 -[(L 44 ) a44 -(EDG) b41 ] s43 In Equation 4-1, A 41 is unsubstituted or substituted by at least one R 10a substituted C3-C 60 carbocyclic group, or unsubstituted or substituted by at least one R 10a substituted C1-C 60 heterocyclic group, L 41 To L 43 Each is independently a single bond, unsubstituted, or affected by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, a41 to a43 are each an independent integer from 1 to 3. Ar 41 and Ar 42 Each is independently unsubstituted or by at least one R 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, or unsubstituted or with at least one R 10a Replacement C6-C 60 aryloxy group, m41 is an integer from 1 to 6. In equations 4-2 to 4-4, X 41 to X 45 each independently is a single bond, O, S, N(R 46 ), B(R 46 ), C(R 46 )(R 47 ) or Si(R 46 )(R 47 ), n41 and n42 are each independently 0, 1 or 2, when n41 is 0, A 41 and A 42 are not connected to each other, and when n42 is 0, A 44 and A 45 are not connected to each other, Y 41 and Y 42 Each can be independently N, B, P, P (=O) or P (=S). Z 41 and Z 42 each independently is N, C(R 48 ) or Si(R 48 ), A 41 to A 45 each independently selected from C3-C 30 carbocyclic groups and C1-C 30 heterocyclic groups, R 41 To R 48 Each of the following is independently a hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, unsubstituted or substituted with at least one R 10a Replacement C1-C 60 alkyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 alkenyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 The alkynyl group, unsubstituted or with at least one R 10a Replacement C1-C 60 alkoxy group, unsubstituted or with at least one R 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, unsubstituted or with at least one R 10a Replacement C6-C 60 aryloxy group, unsubstituted or with at least one R 10a Replacement C6-C 60 Aryl thiols, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2), c41 to c45 are each an independent integer from 1 to 10. In equation 4-9, A 41 is unsubstituted or substituted by at least one R 10a substituted C3-C 60 carbocyclic group, or unsubstituted or substituted by at least one R 10a substituted C1-C 60 heterocyclic group, EDG stands for electron-donating group. b41 is selected from 1, 2, and 3. L 44 It is a single bond, unsubstituted, or bonded by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, a44 is an integer from 1 to 3. s43 is an integer from 1 to 6. wherein R 10a means: Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group or nitro group; Each of the following groups is unsubstituted or replaced: -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group, C6-C 60 aryl thioyl groups, -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 C1-C substituted by (or any combination thereof) 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group or C1-C 60 alkoxy group; Each of the following groups is unsubstituted or replaced: -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1-C 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group, C1-C 60 alkoxy group, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group, C6-C 60 aryl thioyl groups, -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 C3-C replaced by any combination thereof 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group or C6-C 60 aryl thioyl 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 ), Among them, Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each of the following is 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 groups; or unsubstituted or deuterated, -F, cyano groups, C1-C 60 Alkyl groups, C1-C 60 C3-C substituted with alkoxy groups, phenyl groups, biphenyl groups, or any combination thereof 60 Carbocyclic groups or C1-C 60 Heterocyclic groups.

2. The light-emitting device of claim 1, wherein the second compound comprises a hole transport compound.

3. The light-emitting device as claimed in claim 1, wherein... The second compound and the third compound are different from each other, or The first compound and the fourth compound are different from each other.

4. The light-emitting device as claimed in claim 1, wherein the first emitting layer is in direct contact with the second emitting layer.

5. The light-emitting device of claim 1, wherein each of the first compound and the third compound emits light having a maximum emission wavelength of 400 nm to 600 nm.

6. A light-emitting device, including: First electrode; The second electrode facing the first electrode; m light-emitting units are stacked between the first electrode and the second electrode and include an emission layer; as well as An m-1 charge generation layer is disposed between two adjacent light-emitting units in the m light-emitting units, wherein m is an integer of 2 or greater than 2. The emission layer includes a first emission layer and a second emission layer disposed between the first emission layer and the second electrode. The first emitter layer comprises a first compound and a second compound. The second emission layer comprises a third compound and a fourth compound. The first compound and the second compound are different from each other. The third compound and the fourth compound are different from each other. The fourth compound includes at least one selected from electron transport compounds and bipolar compounds. The first compound and the third compound are each dopants, and the second compound and the fourth compound are each the host compound. In the first emitter layer, based on 100 parts by weight of the bulk, the amount of dopant is from 0.01 parts by weight to 15 parts by weight. In the second emitter layer, based on 100 parts by weight of the bulk, the amount of dopant is from 0.01 parts by weight to 15 parts by weight, and The first compound comprises a first fluorescent compound, and the third compound comprises a second fluorescent compound satisfying Equation 1, or The first compound includes the second fluorescent compound satisfying Equation 1, and the third compound includes the first fluorescent compound: [Equation 1] △E ST = S1 - T1 ≤ 0.5 eV In equation 1, S1 is the lowest excited singlet state energy level of the second fluorescent compound, and T1 is the lowest excited triplet energy level of the second fluorescent compound. The second fluorescent compound includes at least one compound represented by one of formulas 4-1 to 4-4 and 4-9: Equation 4-1 Equation 4-2 Equation 4-3 Equation 4-4 Equation 4-9 A 41 -[(L 44 ) a44 -(EDG) b41 ] s43 In Equation 4-1, A 41 is unsubstituted or substituted by at least one R 10a substituted C3-C 60 carbocyclic group, or unsubstituted or substituted by at least one R 10a substituted C1-C 60 heterocyclic group, L 41 To L 43 Each is independently a single bond, unsubstituted, or affected by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, a41 to a43 are each an independent integer from 1 to 3. Ar 41 and Ar 42 Each is independently unsubstituted or by at least one R 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, or unsubstituted or with at least one R 10a Replacement C6-C 60 aryloxy group, m41 is an integer from 1 to 6. In equations 4-2 to 4-4, X 41 to X 45 each independently is a single bond, O, S, N(R 46 ), B(R 46 ), C(R 46 )(R 47 ) or Si(R 46 )(R 47 ), n41 and n42 are each independently 0, 1, or 2. When n41 is 0, A 41 and A 42 They are not connected to each other, and when n42 is 0, A 44 and A 45 They are not connected to each other. Y 41 and Y 42 each independently is N, B, P, P(=O), or P(=S), Z 41 and Z 42 each independently is N, C(R 48 ) or Si(R 48 ), A 41 to A 45 each independently selected from C3-C 30 carbocyclic groups and C1-C 30 heterocyclic groups, R 41 To R 48 Each of the following is independently a hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, unsubstituted or substituted with at least one R 10a Replacement C1-C 60 alkyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 alkenyl groups, unsubstituted or with at least one R 10a Replacement C2-C 60 The alkynyl group, unsubstituted or with at least one R 10a Replacement C1-C 60 alkoxy group, unsubstituted or with at least one R 10a Replacement C3-C 60 Carbocyclic groups, unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, unsubstituted or with at least one R 10a Replacement C6-C 60 aryloxy group, unsubstituted or with at least one R 10a Replacement C6-C 60 Aryl thiols, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2), c41 to c45 are each an independent integer from 1 to 10. In equation 4-9, A 41 It is unsubstituted or by at least one R 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, EDG stands for electron-donating group. b41 is selected from 1, 2, and 3. L 44 It is a single bond, unsubstituted, or bonded by at least one R. 10a Replacement C3-C 60 Carbocyclic group, or unsubstituted or with at least one R 10a Replacement C1-C 60 Heterocyclic groups, a44 is an integer from 1 to 3. s43 is an integer from 1 to 6. wherein R 10a means: Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group or nitro group; Each of the following groups is unsubstituted or replaced: -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group, C6-C 60 aryl thioyl groups, -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 C1-C substituted by (or any combination thereof) 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group or C1-C 60 alkoxy group; Each of the following groups is unsubstituted or replaced: -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C1-C 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group, C1-C 60 alkoxy group, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group, C6-C 60 aryl thioyl groups, -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 C3-C replaced by any combination thereof 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, C6-C 60 aryloxy group or C6-C 60 aryl thioyl 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 ), Among them, Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each of the following is 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 groups; or unsubstituted or deuterated, -F, cyano groups, C1-C 60 Alkyl groups, C1-C 60 C3-C substituted with alkoxy groups, phenyl groups, biphenyl groups, or any combination thereof 60 Carbocyclic groups or C1-C 60 Heterocyclic groups.

7. The light-emitting device of claim 6, wherein the maximum emission wavelength of light emitted from at least one of the light-emitting units is different from the maximum emission wavelength of light emitted from at least one of the remaining light-emitting units.

8. The light-emitting device of claim 6, wherein the light emitted from each of the m light-emitting units has the same maximum emission wavelength.

9. Electronic devices, including: The light-emitting device according to any one of claims 1 to 8; as well as Thin-film transistors, in which The thin-film transistor includes a source electrode and a drain electrode, and The first electrode of the light-emitting device is electrically connected to the source electrode or the drain electrode.

10. The electronic device of claim 9, further comprising a color filter, a color conversion layer, a touch screen layer, a polarizing layer, or a combination thereof.

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