Light emitting device and flat panel display apparatus including the same

Abstract

A light emitting device and a flat panel display apparatus including the same are provided. The light emitting device includes a plurality of first electrodes respectively located in a first sub-pixel, a second sub-pixel, and a third sub-pixel, a second electrode facing the plurality of first electrodes, a first emission layer located in the first sub-pixel and configured to emit a first color light, a second emission layer located in the second sub-pixel and configured to emit a second color light, a first layer integrated with respect to the first sub-pixel, the second sub-pixel, and the third sub-pixel, a first auxiliary layer located between the first layer and the first emission layer, and a first intermediate layer located between the first auxiliary layer and the first emission layer. The first emission layer includes a first host and a first dopant. The first dopant is configured to emit light having a full width at half maximum (FWHM) of about 35 nm or more.

Description

[0001] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0028266, filed in the Korean Intellectual Property Office on March 12, 2019, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] One or more embodiments relate to a light emitting device. BACKGROUND

[0003] A light emitting device can include an anode, a cathode, and an emission layer located between the anode and the cathode. Holes provided from the anode and electrons provided from the cathode recombine in the emission layer to generate excitons. These excitons transition (e.g., jump or relax) from an excited state to a ground state, thereby generating light.

[0004] A light emitting device can be driven at a low voltage, can be implemented to be light and thin, and can have excellent characteristics in terms of viewing angle, contrast, and response rate. Accordingly, the range of applications of light emitting devices has expanded from personal portable devices such as MP3 players or mobile phones to televisions (TVs). SUMMARY

[0005] In a light emitting device in which a common layer of the related art is applied, two emission layers having different colors are stacked, and an intermediate layer is interposed between the two emission layers, thereby preventing or reducing color mixing.

[0006] The intermediate layer serves as a hole injection layer (HIL) and a hole transport layer (HTL) of a single device. However, because the intermediate layer is in direct contact with the emission layer, there is no auxiliary layer in the single device. In addition, because there is no auxiliary layer, the driving voltage increases due to a high hole injection barrier, and electrons from the emission layer into the intermediate layer are not blocked, thereby causing color mixing and a reduction in lifespan.

[0007] In addition, because the common layer is present, luminance varies with angle due to a difference in resonance distance between the two different emission layers, compared to a case in which resonance is the same as each other. Accordingly, it is difficult to secure a viewing angle.

[0008] Aspects of embodiments of the present disclosure provide a light emitting device in which a driving voltage is reduced while luminance is increased.

[0009] Additional aspects will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description and drawings, or can be learned by practice of the presented embodiments.

[0010] An aspect of embodiments of the present disclosure provides a light emitting device including:

[0011] a plurality of first electrodes, respectively, in the first sub-pixel, the second sub-pixel, and the third sub-pixel;

[0012] a second electrode facing the plurality of first electrodes;

[0013] a first emission layer in the first sub-pixel and configured to emit first color light;

[0014] a second emission layer in the second sub-pixel and configured to emit second color light;

[0015] a first layer integrated with respect to the first sub-pixel, the second sub-pixel, and the third sub-pixel;

[0016] a first auxiliary layer between the first layer and the first emission layer; and

[0017] a first intermediate layer between the first auxiliary layer and the first emission layer,

[0018] wherein an absolute value of a highest occupied molecular orbital (HOMO) level of the first intermediate layer is greater than an absolute value of a HOMO level of the first auxiliary layer and less than an absolute value of a HOMO level of the first emission layer, and an absolute value of a lowest unoccupied molecular orbital (LUMO) level of the first intermediate layer is greater than an absolute value of a LUMO level of the first auxiliary layer and less than an absolute value of a LUMO level of the first emission layer,

[0019] the first emission layer includes a first host and a first dopant, and

[0020] a full width at half maximum (FWHM) of light emitted from the first dopant is about 35 nm or more.

[0021] In one embodiment, the FWHM of light emitted from the first dopant can be in a range of about 35 nm to about 50 nm.

[0022] A method of measuring a HOMO level, a LUMO level, and a FWHM of a compound can be as follows, but is not limited thereto. The HOMO level and the LUMO level of the compound can be measured by using a cyclic voltammetry device (such as ZIVE SP2 available from Wonatech) and using a differential pulse voltammetry (DPV) program. Each of a sample solution and an electrolyte solution used herein can be as follows: ferrocene can be used as a standard material, and (Bu)4NPF6 can be used as an electrolyte. For example, a sample solution of a compound to be measured is 5 × 10 -3 a dichloromethane solution of M, a ferrocene sample solution, a (Bu)4NPF6 electrolyte solution, and a 0.1 M acetonitrile solution. E we- I relationship diagram, in which each tangent line is drawn from the point where the current sharply increases, and the voltage of the point where the tangent line contacts the x-axis can be recorded. The HOMO energy level of the test compound can be calculated by setting the HOMO energy level of ferrocene to -4.8 eV.

[0023] In one embodiment, the first dopant can include an arylamine compound or a styrylamine compound.

[0024] In one embodiment, the first dopant can be a compound represented by Formula 501:

[0025] Formula 501

[0026]

[0027] In Formula 501,

[0028] Ar 501 may be a substituted or unsubstituted C5-C 60 carbocyclyl, or a substituted or unsubstituted C1-C 60 heterocyclyl,

[0029] L 501 to L 503 may each independently be selected from substituted or unsubstituted C3-C 10 cycloalkylene, substituted or unsubstituted C1-C 10 heterocycloalkylene, substituted or unsubstituted C3-C 10 cycloalkenylene, substituted or unsubstituted C1-C 10 heterocycloalkenylene, substituted or unsubstituted C6-C 60 arylene, substituted or unsubstituted C1-C 60 heteroarylene, substituted or unsubstituted divalent non-aromatic condensed polycyclyl, and substituted or unsubstituted divalent non-aromatic condensed heteropolycyclyl,

[0030] xd1 to xd3 can each independently be an integer of 0 to 3,

[0031] R 501 and R 502 may each independently be selected from substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 heterocycloalkyl, substituted or unsubstituted C3-C 10 cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 arylthio, substituted or unsubstituted C1-C60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, and

[0032] xd4may be an integer of 1 to 6.

[0033] In one embodiment, the first intermediate layer can include a p-dopant, or can include a single film including a p-dopant.

[0034] For example, the p-dopant can include at least one selected from a quinone derivative, a metal oxide, and a cyano-containing compound.

[0035] In one embodiment, the first auxiliary layer can include a hole transport compound.

[0036] For example, the hole transport compound can include at least one selected from a compound represented by Formula 201 and a compound represented by Formula 202:

[0037] Formula 201

[0038]

[0039] Formula 202

[0040]

[0041] In Formula 201 and Formula 202,

[0042] L 201 to L 204 may each be independently selected from substituted or unsubstituted C3-C 10 cycloalkylene, substituted or unsubstituted C1-C 10 heterocycloalkylene, substituted or unsubstituted C3-C 10 cycloalkenylene, substituted or unsubstituted C1-C 10 heterocycloalkenylene, substituted or unsubstituted C6-C 60 arylene, substituted or unsubstituted C1-C 60 heteroarylene, substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0043] L 205 may be selected from *-O-*', *-S-*', *-N(Q 201 )-*', substituted or unsubstituted C1-C 20 alkylene, substituted or unsubstituted C2-C 20 alkenylene, substituted or unsubstituted C3-C 10 cycloalkylene, substituted or unsubstituted C1-C 10heterocycloalkylene, substituted or unsubstituted C3-C 10 cycloalkenylene, substituted or unsubstituted C1-C 10 heterocycloalkenylene, substituted or unsubstituted C6-C 60 arylene, substituted or unsubstituted C1-C 60 heteroarylene, substituted or unsubstituted bivalent non-aromatic condensed polycyclic group and substituted or unsubstituted bivalent non-aromatic condensed heteropolycyclic group,

[0044] xa1to xa4may each independently be an integer of 0 to 3,

[0045] xa5may be an integer of 1 to 10,

[0046] R 201 to R 204 and Q 201 may each independently be selected from substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 heterocycloalkyl, substituted or unsubstituted C3-C 10 cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group,

[0047] substituted C3-C 10 cycloalkylene, substituted C1-C 10 heterocycloalkylene, substituted C3-C 10 cycloalkenylene, substituted C1-C 10 heterocycloalkenylene, substituted C6-C 60 arylene, substituted C1-C 60 heteroarylene, substituted bivalent non-aromatic condensed polycyclic group, substituted bivalent non-aromatic condensed heteropolycyclic group, substituted C1-C 20 alkylene, substituted C2-C 20 alkenylene, substituted C3-C 10 cycloalkyl, substituted C1-C 10 heterocycloalkyl, substituted C3-C 10 cycloalkenyl, substituted C1-C 10 heterocycloalkenyl, substituted C6-C 60 aryl, substituted C6-C 60 aryloxy, substituted C6-C60 Arylthio, substituted C1-C 60 At least one substituent of the heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, and the substituted monovalent non-aromatic condensed heteropolycyclic group may be selected from the group consisting of:

[0048] Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0049] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 ),-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) selected from at least one of C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0050] C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups;

[0051] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 ),-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) selected from at least one of C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and

[0052] -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 ) and -P(=O)(Q 31 )(Q 32 ),and

[0053] Q 11 to Q 13 , Q 21 to Q 23 and Q 31 to Q 33 may each independently be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, biphenyl group, and terphenyl group.

[0054] In one embodiment, the light-emitting device can further include a second intermediate layer between the first layer and the second emission layer.

[0055] In one embodiment, the light-emitting device can further include a third intermediate layer between the plurality of first electrodes and the first layer.

[0056] In one embodiment, the light-emitting device can further include a fourth intermediate layer between the first intermediate layer and the first emission layer.

[0057] In one embodiment, the absolute value of the HOMO level of the fourth intermediate layer can be greater than the absolute value of the HOMO level of the first intermediate layer and less than the absolute value of the HOMO level of the first emission layer, and

[0058] The absolute value of the LUMO level of the fourth intermediate layer can be greater than the absolute value of the LUMO level of the first intermediate layer and less than the absolute value of the LUMO level of the first emission layer.

[0059] In one embodiment, the light-emitting device can further include at least one selected from an electron injection layer and an electron transport layer between the first emission layer and the second electrode and between the second emission layer and the second electrode.

[0060] In one embodiment, the at least one selected from an electron injection layer and an electron transport layer can include a compound represented by Formula 1:

[0061] Formula 1

[0062]

[0063] In Formula 1,

[0064] L 11 to L 13 may each independently be selected from substituted or unsubstituted C5-C 60 carbocyclyl and substituted or unsubstituted C1-C 60 heterocyclyl,

[0065] a11to a13may each independently be selected from 0, 1, 2, and 3,

[0066] R 11 to R 13 may each independently be selected from substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 heterocycloalkyl, substituted or unsubstituted C3-C 10 cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclyl, and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclyl,

[0067] substituted C5-C 60 carbocyclyl, substituted C1-C 60 heterocyclyl, substituted C3-C 10 cycloalkyl, substituted C1-C 10 heterocycloalkyl, substituted C3-C 10 cycloalkenyl, substituted C1-C 10 heterocycloalkenyl, substituted C6-C 60 aryl, substituted C1-C 60 heteroaryl, substituted monovalent non-aromatic condensed polycyclyl, and substituted monovalent non-aromatic condensed heteropolycyclyl can be selected from:

[0068] deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, and C1-C 60 alkoxy;

[0069] each of which is substituted with from one to five members selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C10 heteroaryloxy, C1-C 60 aryl, C6-C 60 aryloxy, C6-C 60 arylthio, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 ), -N(Q 11 )(Q 12 ), -B(Q 11 )(Q 12 ), -C(=O)(Q 11 ), -S(=O)2(Q 11 ), and -P(=O)(Q 11 )(Q 12 ) selected at least one of C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, and C1-C 60 alkoxy;

[0070] C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C6-C 60 aryloxy, C6-C 60 arylthio, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, and monovalent non-aromatic condensed heteropolycyclic group;

[0071] each of which is substituted with from one to three groups selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C6-C 60 aryloxy, C6-C 60 arylthio, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 ),-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) selected from at least one of C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and

[0072] -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 ) and -P(=O)(Q 31 )(Q 32 ),and

[0073] Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C1-C 60heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, biphenyl group, and terphenyl group.

[0074] For example, the compound represented by Formula 1 can be represented by Formula 1-1:

[0075] Formula 1-1

[0076]

[0077] In Formula 1-1,

[0078] R 11 to R 13 may each independently be the same as R 11 to R 13 defined above,

[0079] Z 11 to Z 13 may each independently be selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, C1-C20alkyl, C1-C20haloalkyl, C1-C20alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthryl, anthryl, fluoranthenyl, pyrenyl, 20 alkyl, C1-C 20 alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthryl, anthryl, fluoranthenyl, pyrenyl, pyrrolyl, thienyl, furanyl, thiopyrrolyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, benzofuranyl, benzothienyl, benzothiopyrrolyl, dibenzothiopyrrolyl, and -Si(Q 31 )(Q 32 )(Q 33 ),

[0080] Q 31 to Q 33 may each independently be selected from the group consisting of C1-C20alkyl, C1-C20haloalkyl, C1-C20alkoxy, phenyl, biphenyl, terphenyl, naphthyl, and pyridyl, and 20 alkyl, C1-C 20 alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthryl, anthryl, fluoranthenyl, pyrenyl,

[0081] d4may be an integer of 0 to 4.

[0082] For example, at least one selected from the electron injection layer and the electron transport layer can include tri[3-(3-pyridyl)mesityl]borane (3TPYMB):

[0083]

[0084] In one embodiment, the light emitting device can further include at least one selected from a hole injection layer and a hole transport layer between the plurality of first electrodes and the first layer, and

[0085] The at least one selected from a hole injection layer and a hole transport layer can include a p-dopant, or can include a single film including a p-dopant.

[0086] In one embodiment, the light emitting device can further include a buffer layer between the first emission layer and the second electrode and between the second emission layer and the second electrode.

[0087] In one embodiment, the first electrode can be an anode, and

[0088] The second electrode can be a cathode.

[0089] In one embodiment, the anode can be a reflective anode or a semi-transmissive anode, and

[0090] The cathode can be a transmissive cathode.

[0091] In one embodiment, the light emitting device can be a top emission device (e.g., a top emission type device).

[0092] In one embodiment, a region of the first layer corresponding to the third sub-pixel can emit third color light, and

[0093] A resonance order of one selected from the first color light, the second color light, and the third color light can be different from resonance orders of the other two.

[0094] In one embodiment, a region of the first layer corresponding to the third sub-pixel can emit third color light, and

[0095] A resonance order of the first color light can be greater than or equal to resonance orders of the second color light and the third color light.

[0096] In one embodiment, the first color light can be blue light, the second color light can be red light or green light, and

[0097] A region of the first layer corresponding to the third sub-pixel can emit green light or red light.

[0098] For example, the first color light can be blue light, the second color light can be red light, and

[0099] A region of the first layer corresponding to the third sub-pixel can emit green light.

[0100] For example, the first color light can be blue light, the second color light can be green light, and

[0101] The region in the first layer corresponding to the third sub-pixel can emit red light.

[0102] Another aspect of embodiments of the present disclosure provides a flat panel display device including a thin film transistor including a source electrode, a drain electrode, and an active layer; and a light emitting device, wherein a first electrode of the light emitting device is electrically bonded to at least one of the source electrode and the drain electrode of the thin film transistor. BRIEF DESCRIPTION OF DRAWINGS

[0103] These and / or other aspects of the embodiments will become apparent and more readily appreciated from the following description, considered in connection with the accompanying drawings, in which:

[0104] Figure 1 is a schematic cross-sectional view of a light emitting device according to an embodiment;

[0105] Figure 2 is a schematic cross-sectional view of a light emitting device according to an embodiment;

[0106] Figure 3 is a graph showing luminance at 0° and 60° of a light emitting device according to Example 1;

[0107] Figure 4 is a graph showing luminance at 0° and 60° of a light emitting device according to Comparative Example 1;

[0108] Figure 5 shows electroluminescence spectra of light emitting devices according to Example 1 and Comparative Example 1;

[0109] Figure 6 shows electroluminescence spectra of light emitting devices according to Example 2 and Comparative Example 2; and

[0110] Figure 7 is a graph showing green emission color coordinates-efficiency of light emitting devices of Example 3 and Example 4. DETAILED DESCRIPTION

[0111] Embodiments of the present disclosure will now be described more fully with reference to example embodiments. However, the subject matter of the present disclosure can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the inventive concept to those skilled in the art. Features of the disclosed embodiments and how to implement them will become apparent by reference to the embodiments described below and to the drawings in which like reference numerals refer to like elements, and in which:

[0112] Hereinafter, embodiments will be described more fully with reference to the accompanying drawings, in which like reference numerals refer to like elements, and redundant descriptions of which will not be repeated.

[0113] As used herein, the terms "first", "second", etc. are used only to distinguish one component from another, and the components should not be limited by these terms.

[0114] As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0115] It will be further understood that the terms "comprises" and / or "comprising", or "includes" and / or "including" when used herein, specify the presence of stated features, integers, steps, operations, elements, or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

[0116] It will be understood that when a layer, film, region or plate is referred to as being "formed on" another layer, film, region or plate, the layer, film, region or plate can be directly or indirectly formed on the other layer, film, region or plate. For example, there can be an intervening layer, film, region or plate present. Also, for ease of illustration, the size of the components in the drawings can be exaggerated. In other words, the following embodiments of the present disclosure are not limited to this because the size and thickness of the components in the drawings can be arbitrarily shown for ease of illustration.

[0117] Figure 1 is a schematic cross-sectional view of a light emitting device 100 according to an embodiment.

[0118] Referring to Figure 1According to the light emitting device 100 of the disclosed embodiments, the light emitting device 100 can include: a plurality of first electrodes 110 located in the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3; a second electrode 150 facing the plurality of first electrodes 110; a first emission layer 130a located in the first sub-pixel SP1 and configured to emit first color light; a second emission layer 130b located in the second sub-pixel SP2 and configured to emit second color light; a first layer 130c integrated with respect to the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3; a first auxiliary layer 130' located between the first layer 130c and the first emission layer 130a; and a first intermediate layer 131 located between the first auxiliary layer 130' and the first emission layer 130a, wherein an absolute value of a highest occupied molecular orbital (HOMO) level of the first intermediate layer 131 can be greater than an absolute value of a HOMO level of the first auxiliary layer 130' and less than an absolute value of a HOMO level of the first emission layer 130a. In addition, an absolute value of a lowest unoccupied molecular orbital (LUMO) level of the first intermediate layer 131 can be greater than an absolute value of a LUMO level of the first auxiliary layer 130' and less than an absolute value of a LUMO level of the first emission layer 130a. The first emission layer 130a can include a first host and a first dopant, and a full width at half maximum (FWHM) of light emitted from the first dopant can be about 35 nm or more.

[0119] In the structure of the light emitting device 100 including a common layer such as the first layer 130c, when the first layer 130c emits light of a primary resonance, the second emission layer 130b can emit light of the primary resonance, and the first emission layer 130a emits light of a secondary resonance or a higher-order resonance. At this time, in the first emission layer 130a, resonance of light is strengthened or enhanced, and an emission spectrum is narrowed due to such resonance. Accordingly, in the light emitting device 100 in which R, G, and B are all driven, variation according to an angle increases, and brightness according to a viewing angle can become disadvantageous.

[0120] Accordingly, in the light emitting device 100 according to the disclosed embodiments, because the first dopant configured to emit light having a FWHM of 35 nm or more is included in the first emission layer 130a, even when resonance is strengthened or enhanced in the first emission layer 130a, variation of an emission spectrum is minimized or reduced, thereby preventing or reducing brightness deterioration according to an angle.

[0121] For example, the FWHM of light emitted from the first dopant can be in a range of about 35 nm to about 50 nm.

[0122] The material for the first dopant is not particularly limited, as long as the material is configured to emit light satisfying the FWHM range, and exemplary non-limiting structures will be described herein.

[0123] In one embodiment, the light emitting device 100 can further include a second intermediate layer 132 between the first layer 130c and the second emission layer 130b, and a third intermediate layer 133 between the first electrode 110 and the first layer 130c.

[0124] In some embodiments, the light emitting device 100 can further include at least one selected from a hole injection layer 121 and a hole transport layer between the first electrode 110 and the first layer 130c. The light emitting device 100 can further include at least one selected from an electron injection layer and an electron transport layer 142 between the first emission layer 130a and the second electrode 150 and between the second emission layer 130b and the second electrode 150. The light emitting device 100 can further include a buffer layer 141 between the first emission layer 130a and the second electrode 150 and between the second emission layer 130b and the second electrode 150. The foregoing layers will be described in greater detail below.

[0125] In one embodiment, as described above, the first layer 130c is integrated with respect to the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3. For example, the first layer 130c can be a common layer.

[0126] For example, the first layer 130c can be located between the first electrode 110 and the first emission layer 130a and between the first electrode 110 and the second emission layer 130b.

[0127] In an example of the structure of the existing light emitting device including a common layer and two or more emission layers, holes are injected through the common layer, and thus, one layer is interposed between the lower emission layer (the common layer) and the upper emission layer.

[0128] In one embodiment, unlike the structure of the existing light emitting device, two layers (e.g., a first auxiliary layer 130' and a first intermediate layer 131) are included between the first layer 130c and the first emission layer 130a. For example, because the first intermediate layer 131 is further included between the first auxiliary layer 130' and the first emission layer 130a, the transport of holes injected from the first layer 130c to the first auxiliary layer 130' can be facilitated, and the electrons injected to the first emission layer 130a through the electron transport layer 142 can be prevented or reduced from passing through the hole transport region without emitting light in the emission layer.

[0129] Further, because the absolute value of the HOMO level of the first intermediate layer 131 is greater than the absolute value of the HOMO level of the first auxiliary layer 130' and is smaller than the absolute value of the HOMO level of the first emission layer 130a, injection of holes from the first auxiliary layer 130' to the first emission layer 130a can be facilitated or improved.

[0130] Further, because the absolute value of the LUMO level of the first intermediate layer 131 is smaller than the absolute value of the LUMO level of the first emission layer 130a, blocking of electrons can also be facilitated or improved.

[0131] In one embodiment, the first emission layer 130a can include a light-emitting material (e.g., a host material), the absolute value of the HOMO level of the first intermediate layer 131 can be greater than the absolute value of the HOMO level of the first auxiliary layer 130' and smaller than the absolute value of the HOMO level of the host material included in the first emission layer 130a, and the absolute value of the LUMO level of the first intermediate layer 131 can be greater than the absolute value of the LUMO level of the first auxiliary layer 130' and smaller than the absolute value of the LUMO level of the host material included in the first emission layer 130a.

[0132] Here, the light-emitting device 100 according to an embodiment will be described in greater detail.

[0133] The first electrode 110

[0134] In Figure 1 In the embodiment, a substrate can additionally be positioned under the first electrode 110 or over the second electrode 150. The substrate can be a glass substrate or a plastic substrate each having excellent mechanical strength, thermal stability, transparency, surface flatness, handleability, and water resistance.

[0135] For example, when the light-emitting device 100 is a top-emitting device (e.g., a top-emission type or a top-emission-like device) configured to emit light in a direction opposite to the substrate, the substrate does not necessarily have to be transparent in nature, but can be, for example, opaque, semi-transmissive, or reflective. In some embodiments, a metal can be used to form the substrate. When the substrate is formed of a metal, the substrate can include at least one selected from carbon, iron, chromium, manganese, nickel, titanium, molybdenum, stainless steel (SUS), invar, inconel, and kovar.

[0136] Further, the light-emitting device 100 can further include a buffer layer, a thin film transistor, and / or an organic insulating layer, etc., between the substrate and the first electrode 110.

[0137] The first electrode 110 can be formed by, for example, depositing or sputtering a material for forming the first electrode 110 on the substrate. When the first electrode 110 is an anode, the material for forming the first electrode 110 can be selected from materials having a high work function to facilitate injection of holes.

[0138] The first electrode 110 can be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode. When the first electrode 110 is a transmissive electrode, a material for forming the first electrode 110 can be selected from indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), zinc oxide (ZnO), and any combination thereof, although embodiments of the present disclosure are not limited thereto. In one or more embodiments, when the first electrode 110 is a semi-transmissive electrode or a reflective electrode, a material for forming the first electrode 110 can be selected from magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), and any combination thereof, although embodiments of the present disclosure are not limited thereto.

[0139] The first electrode 110 can have a single layer structure or a multi-layer structure including two or more layers. For example, the first electrode 110 can have a three-layer structure of ITO / Ag / ITO, although the structure of the first electrode 110 is not limited thereto.

[0140] For example, when the anode is a semi-transmissive anode, the anode can include at least one transparent conductive layer selected from tin oxide (SnO2), indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), indium gallium oxide (IGO), and aluminum zinc oxide (AZO), and a semi-transmissive thin film having a thickness of several nanometers (nm) to several tens of nanometers to improve light emitting efficiency and including silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), indium (In), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), ytterbium (Yb), and any combination thereof.

[0141] For example, when the anode is a reflective anode, the anode can include a reflective film and / or a transparent conductive layer positioned above and / or below the reflective film, the reflective film including Ag, Mg, Al, Pt, Pd, Au, Ni, In, Nd, Ir, Cr, Li, Ca, Yb, and / or any combination thereof.

[0142] The present disclosure is not limited to the foregoing. The anode can include various suitable materials, and the structure of the anode can be variously changed. For example, the anode can have a single layer structure or a multi-layer structure.

[0143] The thickness of the anode can be in a range of about 50 nm to about 130 nm. When the thickness of the anode is in this range, excellent light emitting characteristics can be obtained without significantly increasing the driving voltage.

[0144] The light-emitting device 100 can further include a hole-transporting region between the first electrode 110 and the first layer 130c and / or an electron-transporting region between the first emitting layer 130a and the second electrode 150 and between the second emitting layer 130b and the second electrode 150.

[0145] The hole-transporting region and the first auxiliary layer 130'

[0146] The hole-transporting region can have: i) a single-layer structure including a single layer containing a single material; ii) a single-layer structure including a single layer containing a plurality of different materials; or iii) a multi-layer structure having a plurality of layers including a plurality of different materials.

[0147] In addition to the hole-injecting layer 121 of the first auxiliary layer 130', the hole-transporting region can include at least one layer selected from a hole-transporting layer, an emission-assisting layer, and an electron-blocking layer. Figure 1

[0148] For example, the hole-transporting region can have a single-layer structure including a single layer containing a plurality of different materials or a multi-layer structure having a hole-injecting layer / hole-transporting layer structure, a hole-injecting layer / hole-transporting layer / emission-assisting layer structure, a hole-injecting layer / emission-assisting layer structure, a hole-transporting layer / emission-assisting layer structure, or a hole-injecting layer / hole-transporting layer / electron-blocking layer structure, wherein, for each structure, the constituent layers are sequentially stacked in the order stated from the first electrode 110, but the structure of the hole-transporting region is not limited thereto.

[0149] In one or more embodiments, the first auxiliary layer 130' can include a hole-transporting compound included in the hole-transporting region.

[0150] The hole-transporting region and the first auxiliary layer 130' can include at least one selected from 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 / camphor sulfonic acid (PANI / CSA), polyaniline / poly(4-styrenesulfonate) (PANI / PSS), a compound represented by Formula 201, and a compound represented by Formula 202:

[0151]

[0152] Formula 201

[0153] ​

[0154] Formula 202

[0155]

[0156] In Equations 201 and 202,

[0157] L 201 To L 204 can be independently selected from substituted or unsubstituted C3-C 10 Cycloalkylene, substituted or unsubstituted C1-C 10 Heterocycloalkylene, substituted or unsubstituted C3-C 10 Cycloalkenylene, substituted or unsubstituted C1-C 10 Heterocycloalkenylene, substituted or unsubstituted C6-C 60 Arylene, substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0158] L 205 Can be selected from *-O-*', *-S-*', *-N(Q 201 )-*', substituted or unsubstituted C1-C 20 Alkylene, substituted or unsubstituted C2-C 20 Alkenylene, substituted or unsubstituted C3-C 10 Cycloalkylene, substituted or unsubstituted C1-C 10 Heterocycloalkylene, substituted or unsubstituted C3-C 10 Cycloalkenylene, substituted or unsubstituted C1-C 10 Heterocycloalkenylene, substituted or unsubstituted C6-C 60 Arylene, substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0159] xa1 to xa4 may each independently be an integer from 0 to 3,

[0160] xa5 can be an integer from 1 to 10, and

[0161] R 201 to R 204 and Q 201 can be independently selected from substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.

[0162] In one embodiment, in Formula 202, R 201 and R 202 may be optionally connected via a single bond, dimethyl-methylene or diphenyl-methylene, R 203 and R 204 may be optionally connected via a single bond, dimethyl-methylene or diphenyl-methylene.

[0163] In one or more embodiments, in Formula 201 and Formula 202,

[0164] L 201 to L 205 may each independently be selected from:

[0165] phenylene, indenylene, indenyl, naphthylene, azulenyl, heptalene, indacene, acenylene, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, naphthacenyl, acenaphthyl, pyrenyl, perylenyl, pentaphenyl, hexaphenyl, pentacenyl, coronenyl, ovalenyl, thienyl, furanyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiazolyl, and pyridyl; and

[0166] each substituted with from one to three of deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C 20 alkyl, C1-C 20 alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, phenyl substituted with C1-C 10 alkyl, phenyl substituted with -F, indenyl, naphthyl, azulenyl, heptalene, indacene, acenylene, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, phenylene, naphthylene, azulenylene, perylenylene, pentaphenylene, hexaphenylene, pentacenylene, coronenylene, ovalenylene, thienylene, furanylene, carbazolylene, indolylene, isoindolylene, benzofuranylene, benzothiophenylene, dibenzofuranylene, dibenzothiophenylene, benzocarbazolylene, dibenzocarbazolylene, dithianthrylenyl, and pyridinylene, and 31 32 33 31 32 phenylene, naphthylene, azulenylene, perylenylene, pentaphenylene, hexaphenylene, pentacenylene, coronenylene, ovalenylene, thienylene, furanylene, carbazolylene, indolylene, isoindolylene, benzofuranylene, benzothiophenylene, dibenzofuranylene, dibenzothiophenylene, benzocarbazolylene, dibenzocarbazolylene, dithianthrylenyl, and pyridinylene, and

[0167] Q 31 Q 33 may each independently be selected from C1-C 10 alkyl, C1-C 10 alkoxy, phenyl, biphenyl, terphenyl, and naphthyl.

[0168] In one or more embodiments, xa1to xa4may each independently be 0, 1, or 2.

[0169] In one or more embodiments, xa5may be 1, 2, 3, or 4.

[0170] In one or more embodiments, R 201 to R 204 and Q 201 may each independently be selected from:

[0171] phenyl, biphenyl, terphenyl, cyclopentacenyl, indenyl, naphthyl, azulenyl, heptacenyl, indacenyl, acenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, ​​​​​phenyl, tetracene, perylenyl, pentaphenyl, hexacenyl, pentacene, rubinyl, camphenyl, oophenyl, thienyl, furanyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, dibenzosilyl, and pyridyl; and

[0172] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, substituted C1-C 10 Alkyl phenyl, phenyl substituted with -F, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, tetraphenyl, peryl, peryl, pentaphenyl, hexaphenyl, pentacene, rubinyl, camphenyl, ovalenyl, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, -Si(Q 31 )(Q 32 )(Q 33 ) and -N(Q 31 )(Q 32 ) is at least one selected from phenyl, biphenyl, terphenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, tetracene, perylenyl, peryl, pentaphenyl, hexacenyl, pentacene, rubinyl, camphenyl, oophenyl, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiorol and pyridyl, and

[0173] Q 31 To Q 33 Same as described above.

[0174] In one or more embodiments, from R in Equation 201 201 to R 203 At least one of the selected ones can be independently selected from:

[0175] fluorenyl, spirobifluorenyl, carbazolyl, dibenzofuranyl, and dibenzothiophenyl; and

[0176] substituted with at least one selected from deuterium, -F, -CI, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C 20 alkyl, C1-C 20 alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, phenyl substituted with C1-C 10 alkyl, phenyl substituted with -F, naphthyl, fluorenyl, spirobifluorenyl, carbazolyl, dibenzofuranyl, and dibenzothiophenyl, fluorenyl, spirobifluorenyl, carbazolyl, dibenzofuranyl, and dibenzothiophenyl substituted with at least one selected from deuterium, -F, -CI, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C

[0177] Embodiments of the present disclosure are not limited thereto, however.

[0178] In one or more embodiments, in Formula 202, i) R 201 and R 202 may be connected via a single bond, and / or ii) R 203 and R 204 may be connected via a single bond.

[0179] In one or more embodiments, at least one selected from R 201 to R 204 may each be independently selected from:

[0180] carbazolyl; and

[0181] substituted with at least one selected from deuterium, -F, -CI, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C 20 alkyl, C1-C 20 alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, phenyl substituted with C1-C 10 alkyl, phenyl substituted with -F, naphthyl, fluorenyl, spirobifluorenyl, carbazolyl, dibenzofuranyl, and dibenzothiophenyl, carbazolyl substituted with at least one selected from deuterium, -F, -CI, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C

[0182] Embodiments of the present disclosure are not limited thereto, however.

[0183] The compound represented by Formula 201 can be represented by Formula 201A:

[0184] Formula 201A

[0185]

[0186] In one embodiment, the compound represented by Formula 201 may be represented by Formula 201A(1), but embodiments of the present disclosure are not limited thereto:

[0187] Formula 201A(1)

[0188]

[0189] In one embodiment, the compound represented by Formula 201 may be represented by Formula 201A-1, but embodiments of the present disclosure are not limited thereto:

[0190] Formula 201A-1

[0191]

[0192] In one embodiment, the compound represented by Formula 202 can be represented by Formula 202A:

[0193] Formula 202A

[0194]

[0195] In one embodiment, the compound represented by Formula 202 can be represented by Formula 202A-1:

[0196] Formula 202A-1

[0197]

[0198] In Formula 201A, Formula 201A(1), Formula 201A-1, Formula 202A, and Formula 202A-1,

[0199] L 201 To L 203 , xa1 to xa3, xa5 and R 202 to R 204 Same as described above,

[0200] R 211 and R 212 Can independently bind to R 203 are defined identically, and

[0201] R 213 to R 217 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, substituted C1-C 10Alkyl phenyl, phenyl substituted with -F, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, benzothiophene, dibenzofuranyl, dibenzothiophene, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, and pyridyl.

[0202] The hole transport region and the first auxiliary layer 130 ′ may include at least one compound selected from Compound HT1 to Compound HT39, but the embodiments of the present disclosure are not limited thereto.

[0203]

[0204]

[0205]

[0206] The thickness of the hole transport region can be approximately to approximately In the range of, for example, about to approximately When the hole transport region includes at least one selected from the hole injection layer 121 and the hole transport layer, the thickness of the hole injection layer 121 may be in the range of about to approximately (For example, approximately to approximately ), the thickness of the hole transport layer can be in the range of about to approximately (For example, approximately to approximately When the thicknesses of the hole transport region, the hole injection layer 121, and the hole transport layer are within these ranges, suitable or satisfactory hole transport characteristics may be obtained without significantly increasing the driving voltage.

[0207] The emission assisting layer can improve luminous efficiency by compensating the optical resonance distance according to the wavelength of light emitted by the emission layer, and the electron blocking layer can block electrons from flowing from the electron transport region. The emission assisting layer and the electron blocking layer can include the materials described above.

[0208] p-dopant

[0209] At least one selected from the hole injection layer 121 and the hole transport layer can include a p-dopant, or can include a single film including a p-dopant.

[0210] Further, the first intermediate layer 131, the second intermediate layer 132, and the third intermediate layer 133 can each independently include a p-dopant, or can each independently include a single film including a p-dopant.

[0211] In one embodiment, the hole transport region can further include a p-dopant having a lowest unoccupied molecular orbital (LUMO) energy level of about -3.5 eV or less.

[0212] The p-dopant can include at least one selected from a quinone derivative, a metal oxide, and a cyano-containing compound, although embodiments of the present disclosure are not limited thereto.

[0213] In one embodiment, the p-dopant can include at least one selected from the following compounds:

[0214] a quinone derivative such as tetracyanoquinodimethane (TCNQ) or 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ);

[0215] a metal oxide such as tungsten oxide or molybdenum oxide;

[0216] 1,4,5,8,9,12-hexaazatriphenylenehexacarbonitrile (HAT-CN);

[0217] a compound represented by formula 221; and

[0218] p-dopant 1,

[0219] However, embodiments of the present disclosure are not limited thereto:

[0220]

[0221]

[0222] In formula 221,

[0223] R 221 to R 223 may each independently be selected from substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 heterocycloalkyl, substituted or unsubstituted C3-C 10 cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C1-C 60heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, wherein at least one selected from R 221 to R 223 may have at least one substituent selected from cyano, -F, -Cl, -Br, -I, C1-C 20 alkyl substituted with -F, C1-C 20 alkyl substituted with -Cl, C1-C 20 alkyl substituted with -Br, and C1-C 20 alkyl substituted with -I.

[0224] The first emission layer 130a, the second emission layer 130b, and the first layer 130c

[0225] As described above, the first emission layer 130a can include a first host and a first dopant, and a full width at half maximum (FWHM) of light emitted from the first dopant can be about 35 nm or more. The first dopant can be configured to emit first color light.

[0226] Further, the second emission layer 130b and the first layer 130c can include a host and a dopant (e.g., can each include a host and a dopant). The dopant can include at least one selected from a phosphorescent dopant and a fluorescent dopant. The dopant can be configured to emit second color light and third color light.

[0227] For example, the first color light to the third color light can each be independently selected from blue light, red light, and green light. The amount of the dopant can be in the range of about 0.01 parts by weight to about 15 parts by weight based on 100 parts by weight of the host, but embodiments of the present disclosure are not limited thereto.

[0228] The thicknesses of the first emission layer 130a, the second emission layer 130b, and the first layer 130c can each be independently in the range of about to about , for example, in the range of about to about When the thicknesses of the emission layers are in the range, excellent light emitting properties can be obtained without significantly increasing a driving voltage.

[0229] The first host in the first emission layer 130a and the hosts in the second emission layer 130b and the first layer 130c

[0230] The first host or the host can each independently include a compound represented by Formula 301:

[0231] Formula 301

[0232] [Ar 301 ] xb11-[(L 301 ) xb1 -R 301 ] xb21 .

[0233] In formula 301,

[0234] Ar 301 may be a substituted or unsubstituted C5-C 60 carbocyclyl or a substituted or unsubstituted C1-C 60 heterocyclyl,

[0235] xb11may be 1, 2 or 3,

[0236] L 301 may be selected from substituted or unsubstituted C3-C 10 cycloalkylene, substituted or unsubstituted C1-C 10 heterocycloalkylene, substituted or unsubstituted C3-C 10 cycloalkenylene, substituted or unsubstituted C1-C 10 heterocycloalkenylene, substituted or unsubstituted C6-C 60 arylene, substituted or unsubstituted C1-C 60 heteroarylene, substituted or unsubstituted bivalent non-aromatic condensed polycyclyl and substituted or unsubstituted bivalent non-aromatic condensed heteropolycyclyl,

[0237] xb1may be an integer from 0 to 5,

[0238] R 301 may be selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, substituted or unsubstituted C1-C 60 alkyl, substituted or unsubstituted C2-C 60 alkenyl, substituted or unsubstituted C2-C 60 alkynyl, substituted or unsubstituted C1-C 60 alkoxy, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 heterocycloalkyl, substituted or unsubstituted C3-C 10 cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 aralkylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclyl, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclyl, -Si(Q 301 )(Q302 )(Q 303 )、-N(Q 301 )(Q 302 )、-B(Q 301 )(Q 302 ),-C(=O)(Q 301 )、-S(=O)2(Q 301 ) and -P(=O)(Q 301 )(Q 302 ),

[0239] xb21 can be an integer from 1 to 5, and

[0240] Q 301 To Q 303 Can be independently selected from C1-C 10 Alkyl, C1-C 10 alkoxy, phenyl, biphenyl, terphenyl, and naphthyl, but the embodiments of the present disclosure are not limited thereto.

[0241] In one embodiment, Ar in Formula 301 301 Can be selected from:

[0242] Naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, naphthacene, perylenyl, phenanthrenyl, indenoanthryl, dibenzofuranyl, and dibenzothiophenyl; and

[0243] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl, naphthyl, -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 ) and -P(=O)(Q 31 )(Q 32 ) is at least one selected from naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, naphthacene, perylenyl, perylenyl, pentaphenyl, indenoanthryl, dibenzofuranyl and dibenzothiophenyl, and

[0244] Q 31 to Q 33 may each independently be selected from the group consisting of C1-C 10 alkyl, C1-C 10 alkoxy, phenyl, biphenyl, terphenyl, and naphthyl, but embodiments of the present disclosure are not limited thereto.

[0245] When xb11 in Formula 301 is two or more, two or more Ar 301 may be connected via a single bond.

[0246] In one or more embodiments, the compound represented by Formula 301 can be represented by Formula 301-1 or Formula 301-2:

[0247] Formula 301-1

[0248]

[0249] Formula 301-2

[0250]

[0251] In Formula 301-1 and Formula 301-2,

[0252] Ring A 301 to Ring A 304 may each independently be selected from the group consisting of a benzene ring, a naphthalene ring, a phenanthrene ring, a fluoranthene ring, a benzo[9,10]phenanthrene ring, a pyrene ring, a pyridine ring, a pyrimidine ring, an indene ring, a fluorene ring, a spirobifluorene ring, a benzofluorene ring, a dibenzofluorene ring, an indole ring, a carbazole ring, a benzocarbazole ring, a dibenzocarbazole ring, a furan ring, a benzofuran ring, a dibenzofuran ring, a naphthofuran ring, a benzonaphthofuran ring, a dinaphthofuran ring, a thiophene ring, a benzothiophene ring, a dibenzothiophene ring, a naphthothiophene ring, a benzonaphthothiophene ring, and a dinaphthothiophene ring,

[0253] X 301 may be O, S, or N-[(L 304 ) xb4 -R 304 ],

[0254] R 311 to R 314 may each independently be selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidine group, a hydrazine group, a hydrazone group, C1-C 20 alkyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl, naphthyl, -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 ) and -P(=O)(Q 31 )(Q 32 ),

[0255] xb22 and xb23 can each independently be 0, 1 or 2,

[0256] L 301 、xb1、R 301 and Q 31 To Q 33 Same as described above,

[0257] L 302 To L 304 Can be independently combined with L 301 The same definition,

[0258] xb2 to xb4 may each independently be the same as defined in conjunction with xb1, and

[0259] R 302 to R 304 Can independently bind to R 301 The same definition.

[0260] For example, L in Equation 301, Equation 301-1, and Equation 301-2 301 To L 304 Can be independently selected from:

[0261] Phenylene, naphthylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrenylene, anthracenylene, fluoranthenylene, benzo[9,10]phenanthrenylene, pyrenylene, phenanthrenylene phenylene, perylene, pentaphenylene, hexaphenylene, pentaphenylene, thienylene, furylene, carbazolylene, indolylene, isoindolylene, benzofurylene, benzothiophenylene, dibenzofurylene, dibenzothiophenylene, benzocarbazolylene, dibenzocarbazolylene, dibenzothiophenylene, pyridylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isoxazolylene, thiadiazolylene, oxadiazolylene, pyrazinylene, pyrimidinylene, pyridazinylene, triazinylene, quinolinylene, isoquinolinylene, benzoquinolinylene, phthalazinylene, naphthyridinylene, quinoxalinylene, quinazolinylene, cinnolinylene, phenanthridinylene, acridinylene, phenanthrolinylene, phenazinylene, benzimidazolylene, isobenzothiazolylene, benzoxazolylene, isobenzoxazolylene, triazolylene, tetrazolylene, imidazopyridinylene, imidazopyrimidinylene, and azacarbazolylene; and

[0262] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, thiadiazolyl, oxadiazolyl, pyridyl azinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl, azacarbazolyl, -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 ) and -P(=O)(Q 31 )(Q 32 ) is at least one of phenylene, naphthylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrenylene, anthracenylene, fluoranthenylene, benzo[9,10]phenanthrenylene, pyrenylene, pyrenylene, pyrenylene phenylene, perylenylene, pentaphenylene, hexaperi-phenylene, pentacene, thiophenylene, furanylene, carbazolylene, indolylene, isoindolylene, benzofuranylene, benzothiophenylene, dibenzofuranylene, dibenzothiophenylene, benzocarbazolylene, diphenylcarbazolylene, dithiophenyl- carbazolylene, pyridinylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isoxazolylene, thiadiazolylene, oxadiazolylene, pyrazinylene, pyrimidinylene, pyridazinylene, triazinylene, quinolinylene, isoquinolinylene, benzoquinolinylene, phtalazinylene, naphthridinylene, quinoxalinylene, quinazolinylene, cinnolinylene, phenanthridinylene, acridinylene, phenanthrolinylene, phenoxazinylene, benzimidazolylene, isobenzothiazolylene, benzoxazolylene, isobenzoxazolylene, triazolylene, tetrazolylene, imidazopyridinylene, imidazopyrimidinylene and azacarbazolylene, and

[0263] Q 31 to Q 33 are the same as described above.

[0264] In one embodiment, R301, R301-1and R301-2in Formula 301, Formula 301-1and Formula 301-2are each independently selected from the group consisting of: 301 to R 304 may each independently be selected from the group consisting of:

[0265] phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzo-fluorenyl, dibenzo-fluorenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, phenylene, perylenylene, pentaphenylene, hexaperi-phenylene, pentacene, thiophenylene, furanylene, carbazolylene, indolylene, isoindolylene, benzofuranylene, benzothiophenylene, dibenzofuranylene, dibenzothiophenylene, benzocarbazolylene, diphenylcarbazolylene, dithiophenyl- carbazolylene, pyridinylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isoxazolylene, thiadiazolylene, oxadiazolylene, pyrazinylene, pyrimidinylene, pyridazinylene, triazinylene, quinolinylene, isoquinolinylene, benzoquinolinylene, phtalazinylene, naphthridinylene, quinoxalinylene, quinazolinylene, cinnolinylene, phenanthridinylene, acridinylene, phenanthrolinylene, phenoxazinylene, benzimidazolylene, isobenzothiazolylene, benzoxazolylene, isobenzoxazolylene, triazolylene, tetrazolylene, imidazopyridinylene, imidazopyrimidinylene and azacarbazolylene, and

[0266] each independently substituted with from one to twelve groups independently selected from deuterium, -F, -CI, -Br, -I, hydroxyl, cyano, nitro, amidine, hydrazine, hydrazone, C1-C20alkyl, C1-C20alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzo-fluorenyl, dibenzo-fluorenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, 20 alkyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzo-fluorenyl, dibenzo-fluorenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, thiadiazolyl, oxadiazolyl, pyridyl azinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl, azacarbazolyl, -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 ) and -P(=O)(Q 31 )(Q 32 ) is at least one selected from phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, thiadiazolyl, oxadiazolyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl, and azacarbazolyl, and

[0267] Q 31 To Q 33 Same as described above.

[0268] In one or more embodiments, the first host or host can include an alkaline earth metal complex. For example, the first host or host can be selected from Be complexes (eg, compound H55), Mg complexes, and Zn complexes.

[0269] The first host or host can include at least one selected from 9,10-di(2-naphthyl)anthracene (ADN), 2-methyl-9,10-bis(naphthalen-2-yl)anthracene (MADN), 9,10-di(2-naphthyl)-2-tert-butyl-anthracene (TBADN), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), 1,3-di-9-carbazolylbenzene (mCP), 1,3,5-tris(carbazol-9-yl)benzene (TCP), and compounds H1 to H55, but embodiments of the present disclosure are not limited thereto:

[0270]

[0271]

[0272]

[0273] The phosphorescent dopant in the second emission layer 130b and the first layer 130c can include an organometallic complex represented by Formula 401:

[0274] Formula 401

[0275] M(L 401 ) xc1 (L 402 ) xc2

[0276] Formula 402

[0277]

[0278] In Formula 401 and Formula 402,

[0279] M can be selected from iridium (Ir), platinum (Pt), palladium (Pd), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb), rhodium (Rh), and thulium (Tm),

[0280] L 401 may be selected from ligands represented by Formula 402, xc1 can be 1, 2, or 3, wherein, when xc1 is two or more, two or more L 401 may be the same as or different from each other,

[0281] L 402 may be an organic ligand, xc2 can be an integer of 0 to 4, wherein, when xc2 is two or more, two or more L 402 may be the same as or different from each other,

[0282] X 401 to X 404 may each independently be nitrogen or carbon,

[0283] X 401 and X 403 may be connected via a single or double bond, X 402 and X 404 may be connected via a single or double bond,

[0284] A 401 and A 402 may each independently be selected from the group consisting of C5-C 60 carbocyclyl or C1-C 60 heterocyclyl,

[0285] X 405 may be a single bond, *-O-*', *-S-*', *-C(=O)-*', *-N(Q 411 )-*', *-C(Q 411 )(Q 412 )-*', *-C(Q 411 )=C(Q 412 )-*', *-C(Q 411 )=*' or *=C=*, wherein Q 411 and Q 412 may be hydrogen, deuterium, C1-C 20 alkyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl or naphthyl,

[0286] X 406 may be a single bond, O or S,

[0287] R 401 and R 402 may each independently be selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, substituted or unsubstituted C1-C 20 alkyl, substituted or unsubstituted C1-C 20 alkoxy, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 heterocycloalkyl, substituted or unsubstituted C3-C 10 cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 401 )(Q 402)(Q 403 ), -N(Q 401 )(Q 402 ), -B(Q 401 )(Q 402 ), -C(=O)(Q 401 ), -S(=O)2(Q 401 ), and -P(=O)(Q 401 )(Q 402 ), wherein Q 401 to Q 403 may each independently be selected from C1-C 10 alkyl, C1-C 10 alkoxy, C6-C 20 aryl, and C1-C 20 heteroaryl,

[0288] xc11and xc12may each independently be an integer from 0 to 10, and

[0289] each of * and * in formula 402 represents a binding site to M in formula 401.

[0290] In one embodiment, A 401 and A 402 in formula 402 can each independently be selected from benzene, naphthalene, fluorene, spirobifluorene, indene, pyrrole, thiophene, furan, imidazole, pyrazole, thiazole, isothiazole, oxazole, isoxazole, pyridine, pyrazine, pyrimidine, pyridazine, quinoline, isoquinoline, benzoquinoline, quinoxaline, quinazoline, carbazole, benzimidazole, benzofuran, benzothiophene, isobenzothiophene, benzoxazole, isobenzoxazole, triazole, tetrazole, oxadiazole, triazine, dibenzofuran, and dibenzothiophene.

[0291] In one or more embodiments, in formula 402, i) X 401 may be nitrogen, X 402 may be carbon, or ii) X 401 and X 402 may each be nitrogen simultaneously.

[0292] In one or more embodiments, R 401 and R 402 in formula 402 can each independently be selected from:

[0293] hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 20 alkyl, and C1-C 20 alkoxy;

[0294] C1-C 20 alkyl and C1-C 20 alkoxy;

[0295] cyclopentyl, cyclohexyl, adamantyl, norbornyl, norbornenyl, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl, quinazolinyl, carbazolyl, dibenzofuranyl, and dibenzothiophenyl;

[0296] C1-C 20 alkyl and C1-C 20 alkoxy, cyclopentyl, cyclohexyl, adamantyl, norbornyl, norbornenyl, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl, quinazolinyl, carbazolyl, dibenzofuranyl, and dibenzothiophenyl;

[0297] -Si(Q 401 )(Q 402 )(Q 403 ), -N(Q 401 )(Q 402 ), -B(Q 401 )(Q 402 ), -C(=O)(Q 401 ), -S(=O)2(Q 401 ), and -P(=O)(Q 401 )(Q 402 ), and

[0298] Q 401 to Q 403 may each independently be selected from C1-C 10 alkyl, C1-C 10 alkoxy, phenyl, biphenyl, and naphthyl, although embodiments of the present disclosure are not limited thereto.

[0299] In one or more embodiments, when xc1in Formula 401 is two or more, two or more L 401two A's in 401 may be optionally connected via X as a linker 407 linker, or two or more L 401 two A's in 402 may be optionally connected via X as a linker 408 (see compounds PD1 to PD4 and PD7). X 407 and X 408 may each independently be a single bond, *-O-*', *-S-*', *-C(=O)-*', 413 *-N(Q 413 )-*', *-C(Q 414 )-*', or *-C(Q 413 )=C(Q 414 )-*' (wherein Q 413 and Q 414 may each independently be hydrogen, deuterium, C1-C 20 alkyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl, or naphthyl), but are not limited thereto.

[0300] L 402 in formula 401 can be a monovalent organic ligand, a divalent organic ligand, or a trivalent organic ligand. For example, L 402 may be selected from halogen, diketone (e.g., acetylacetone), carboxylic acid (e.g., picolinic acid), -C(=O), isonitrile, -CN, and phosphorus-containing substance (e.g., phosphine or phosphite), but embodiments of the present disclosure are not limited thereto.

[0301] In one or more embodiments, the phosphorescent dopant can be selected from, for example, compounds PD1 to PD25, but embodiments of the present disclosure are not limited thereto:

[0302]

[0303]

[0304] the first dopant in the first emission layer 130a and the fluorescent dopant in the second emission layer 130b and the first layer 130c

[0305] The first dopant can include an arylamine compound or a styrylamine compound.

[0306] The fluorescent dopant can include an arylamine compound or a styrylamine compound.

[0307] The first dopant or the fluorescent dopant can each independently include a compound represented by formula 501:

[0308] Formula 501

[0309]

[0310] In Formula 501,

[0311] Ar 501 may be substituted or unsubstituted C5-C 60 carbocyclyl or substituted or unsubstituted C1-C 60 heterocyclyl,

[0312] L 501 to L 503 may each independently be selected from substituted or unsubstituted C3-C 10 cycloalkylene, substituted or unsubstituted C1-C 10 heterocycloalkylene, substituted or unsubstituted C3-C 10 cycloalkenylene, substituted or unsubstituted C1-C 10 heterocycloalkenylene, substituted or unsubstituted C6-C 60 arylene, substituted or unsubstituted C1-C 60 heteroarylene, substituted or unsubstituted bivalent non-aromatic condensed polycyclyl and substituted or unsubstituted bivalent non-aromatic condensed heteropolycyclyl,

[0313] xd1 to xd3 can each independently be an integer of 0 to 3,

[0314] R 501 and R 502 may each independently be selected from substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 heterocycloalkyl, substituted or unsubstituted C3-C 10 cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclyl and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclyl, and

[0315] xd4 can be an integer of 1 to 6.

[0316] In one embodiment, Ar 501 may be selected from:

[0317] naphthyl, heptacenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, tetracenyl, chrysenyl, pyrenyl, pentacenyl, indanthryl, and indenophenanthryl; and

[0318] each independently substituted with at least one selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C 20 alkyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl, and naphthyl, heptacenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, tetracenyl, chrysenyl, pyrenyl, pentacenyl, indanthryl, and indenophenanthryl.

[0319] In one or more embodiments, L 501 to L 503 may each independently be selected from:

[0320] phenylene, naphthylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrylene, anthrylene, fluoranthrylene, benzo[9,10]phenanthrylene, pyrenylene, tetracenylene, chrysenylene, pyrenylene, pentacenylene, hexacenylene, pentacenylene, thienylene, furanylene, carbazolylene, indolylene, isoindolylene, benzofuranylene, benzothienylene, dibenzofuranylene, dibenzothienylene, benzocarbazolylene, dibenzocarbazolylene, dibenzothiazolylene, and pyridinylene; and

[0321] each independently substituted with at least one selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C 20 alkyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, tetracenyl, chrysenyl, pyrenyl, pentacenyl, indanthryl, and indenophenanthryl. phenylene, benzothiophene, benzofuranylene, dibenzofuranylene, dibenzothiophene, benzocarbazolylene, dibenzocarbazolylene, dibenzothioxylene, and pyridylene.

[0322] In one or more embodiments, R in Formula 501 501 and R 502 Can be independently selected from:

[0323] Phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, benzothiophene, dibenzofuranyl, dibenzothiophene, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophene, and pyridyl; and

[0324] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl and -Si(Q 31 )(Q 32 )(Q 33 ) is at least one selected from phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiorol and pyridyl, and

[0325] Q 31 To Q 33 Can be independently selected from C1-C 10 Alkyl, C1-C 10 Alkoxy, phenyl, biphenyl, terphenyl and naphthyl.

[0326] In one or more embodiments, xd4 in Formula 501 may be 2, but the embodiments of the present disclosure are not limited thereto.

[0327] For example, the first dopant or fluorescent dopant may be selected from Compound FD1 to Compound FD22:

[0328]

[0329]

[0330]

[0331] In one embodiment, the first dopant or fluorescent dopant may be selected from the following compounds, but the embodiments of the present disclosure are not limited thereto:

[0332]

[0333] Electron transport region

[0334] The electron transport region may have: i) a single layer structure including a single layer including a single material; ii) a single layer structure including a single layer including a plurality of different materials; or iii) a multilayer structure having a plurality of layers including a plurality of different materials.

[0335] Apart from Figure 1 In addition to the electron transport layer 142 or the buffer layer 141 shown in FIG, the electron transport region may further include at least one layer selected from a hole blocking layer, an electron control layer, and an electron injection layer, but the embodiments of the present disclosure are not limited thereto.

[0336] For example, 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 sequentially stacked in the order of the description from the emission layer. However, embodiments of the structure of the electron transport region are not limited thereto.

[0337] Apart from Figure 1 In addition to the electron transport layer 142 shown in FIG, the electron transport region may optionally include an electron injection layer.

[0338] At least one selected from the electron injection layer and the electron transport layer 142 may include a compound represented by Formula 1:

[0339] Formula 1

[0340]

[0341] In formula 1,

[0342] L 11 to L 13 may each independently be selected from substituted or unsubstituted C5-C 60 carbocyclyl and substituted or unsubstituted C1-C 60 heterocyclyl,

[0343] a11to a13may each independently be 0, 1, 2, and 3,

[0344] R 11 to R 13 may each independently be selected from substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 heterocycloalkyl, substituted or unsubstituted C3-C 10 cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclyl, and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclyl,

[0345] substituted C5-C 60 carbocyclyl, substituted C1-C 60 heterocyclyl, substituted C3-C 10 cycloalkyl, substituted C1-C 10 heterocycloalkyl, substituted C3-C 10 cycloalkenyl, substituted C1-C 10 heterocycloalkenyl, substituted C6-C 60 aryl, substituted C1-C 60 heteroaryl, substituted monovalent non-aromatic condensed polycyclyl, and substituted monovalent non-aromatic condensed heteropolycyclyl can be selected from:

[0346] deuterium, -F, -CI, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, and C1-C 60 alkoxy;

[0347] each of which is substituted with from one to five members selected from deuterium, -F, -CI, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 ),-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) selected from at least one of C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0348] C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups;

[0349] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23), -N(Q 21 ), -B(Q 22 ), -C(=O)(Q 21 ), -S(=O)2(Q 22 ), and -P(=O)(Q 21 )(Q 21 ), and 21 , and 22 , and 10 , and 10 , and 10 , and 10 , and 60 , and 60 , and 60 , and 60 , and , and

[0350] -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 ), and -P(=O)(Q 31 )(Q 32 , and , and

[0351] Q 11 , Q 13 , Q 21 , Q 23 , and Q 31 , and Q 33 may each independently be selected from the group consisting of hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidine, hydrazine, hydrazone, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, biphenyl, and terphenyl.

[0352] Compared to other light-emitting devices, in a light-emitting device including a common layer, the driving voltage inevitably increases. To minimize or reduce the increase in the driving voltage, the third color light emitted from the common layer can be emitted in a first-order resonance. In this case, the luminous efficiency of the third color light is reduced due to the surface plasmon effect compared to the case of emitting light in a second-order resonance.

[0353] The light emitting device 100 according to the embodiment may improve light emitting efficiency and / or reduce driving voltage by including the compound represented by Formula 1 in the electron transport layer 142 included in the electron transport region.

[0354] In some embodiments, the compound represented by Formula 1 has low refractive properties. When introduced into the electron transport region, the transmittance of the electron transport region increases, and the light coupling effect is maximized or increased, thereby improving luminous efficiency.

[0355] For example, the compound represented by Formula 1 can be represented by Formula 1-1:

[0356] Formula 1-1

[0357]

[0358] In formula 1-1,

[0359] R 11 to R 13 can be independently combined with R as described above 11 to R 13 The same definition,

[0360] Z 11 to Z 13 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, C1-C 20 Alkyl, C1-C 20 Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, pyrenyl, yl, pyrrolyl, thienyl, furyl, thiolyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, benzofuranyl, benzothienyl, benzothiorolyl, dibenzothiorolyl and -Si(Q 31 )(Q 32 )(Q 33 ),

[0361] Q 31 To Q 33 Can be independently selected from C1-C 20 Alkyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl, naphthyl and pyridyl, and

[0362] d4 can be an integer from 0 to 4.

[0363] For example, at least one selected from the electron injection layer and the electron transport layer 142 may include tris[3-(3-pyridyl)podyl]borane (3TPYMB):

[0364]

[0365] The electron transport region (e.g., a buffer layer, a hole blocking layer, an electron control layer, and / or the electron transport layer 142 in the electron transport region) may include a metal-free compound including at least one π-electron-depleted nitrogen-containing ring.

[0366] As used herein, the term "π-electron-poor nitrogen-containing ring" refers to a C1-C2-N3 ... 60 Heterocyclic group.

[0367] For example, the “π-electron-poor nitrogen-containing ring” can be: i) a 5- to 7-membered heteromonocyclic group having at least one *-N=*′ moiety; ii) a heteropolycyclic group in which two or more 5- to 7-membered heteromonocyclic groups, each having at least one *-N=*′ moiety, are condensed with each other (e.g., combined together); or iii) a heteropolycyclic group in which at least one of the 5- to 7-membered heteromonocyclic groups, each having at least one *-N=*′ moiety, is condensed with at least one C5-C 60 A carbocyclic group is condensed (eg, combined) with a heteropolycyclic group.

[0368] Examples of π-electron-poor nitrogen-containing rings include, but are not limited to, imidazole, pyrazole, thiazole, isothiazole, oxazole, isoxazole, pyridine, pyrazine, pyrimidine, pyridazine, indazole, purine, quinoline, isoquinoline, benzoquinoline, phthalazine, naphthyridine, quinoxaline, quinazoline, cinnoline, phenanthridine, acridine, phenanthroline, phenazine, benzimidazole, isobenzothiazole, benzoxazole, isobenzoxazole, triazole, tetrazole, oxadiazole, triazine, thiadiazole, imidazopyridine, imidazopyrimidine, and azacarbazole.

[0369] For example, the electron transport region may include a compound represented by Formula 601:

[0370] Formula 601

[0371] [Ar 601 ] xe11 -[(L 601 ) xe1 -R 601 ] xe21 .

[0372] In formula 601,

[0373] Ar 601 may be substituted or unsubstituted C5-C 60 carbocyclyl or substituted or unsubstituted C1-C 60 heterocyclyl,

[0374] xe11may be 1, 2 or 3,

[0375] L 601 may be selected from substituted or unsubstituted C3-C 10 cycloalkylene, substituted or unsubstituted C1-C 10 heterocycloalkylene, substituted or unsubstituted C3-C 10 cycloalkenylene, substituted or unsubstituted C1-C 10 heterocycloalkenylene, substituted or unsubstituted C6-C 60 arylene, substituted or unsubstituted C1-C 60 heteroarylene, substituted or unsubstituted bivalent non-aromatic condensed polycyclic group and substituted or unsubstituted bivalent non-aromatic condensed heteropolycyclic group,

[0376] xe1may be an integer of 0 to 5,

[0377] R 601 may be selected from substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 heterocycloalkyl, substituted or unsubstituted C3-C 10 cycloalkenyl, substituted or unsubstituted C1-C 10 heterocycloalkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 601 )(Q 602 )(Q 603 ), -C(=O)(Q 601 ), -S(=O)2(Q 601 ) and -P(=O)(Q 601 )(Q602 ),

[0378] Q 601 to Q 603 may each independently be C1-C 10 alkyl, C1-C 10 alkoxy, phenyl, biphenyl, terphenyl, or naphthyl, and

[0379] xe21may be an integer from 1 to 5.

[0380] In one embodiment, xe11number of Ar 601 and xe21number of R 601 may each independently be C1-C

[0381] In one embodiment, Ar 601 in formula 601may be selected from:

[0382] phenyl, naphthyl, fluorenyl, spirobifluorenyl, benzo fluorenyl, dibenzo fluorenyl, phenalenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, phenyl, naphthyl, fluorenyl, spirobifluorenyl, benzo fluorenyl, dibenzo fluorenyl, phenalenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl,

[0383] each of which is substituted with at least one selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C 20 alkyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl, naphthyl, -Si(Q 31 )(Q 32 )(Q 33 ), -S(=O)2(Q 31 ), and -P(=O)(Q 31 )(Q 32 each of which is substituted with at least one selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C anthryl, naphthyl, phenanthryl, pyrenyl, tetracenyl, chrysenyl, naphthacenyl, pentaphenyl, indanthenyl, dibenzofuranyl, dibenzothiophenyl, carbazolyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, indazolyl, purinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthylidinyl, quinoxalyl, quinazolyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenoxazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, thiadiazolyl, imidazopyridinyl, imidazopyrimidinyl, and azacarbazolyl, and

[0384] Q 31 to Q 33 may each independently be selected from the group consisting of C1-C 10 alkyl, C1-C 10 alkoxy, phenyl, biphenyl, terphenyl, and naphthyl.

[0385] When xe11 in formula 601 is two or more, two or more Ar 601 may be connected via a single bond.

[0386] In one or more embodiments, Ar 601 may be anthryl.

[0387] In one or more embodiments, the compound represented by formula 601 can be represented by formula 601-1:

[0388] formula 601-1

[0389]

[0390] In formula 601-1,

[0391] X 614 may be N or C(R 614 ), X 615 may be N or C(R 615 ), X 616 may be N or C(R 616 ), wherein at least one selected from X 614 to X 616 may be N,

[0392] L 611 to L 613 may each independently be the same as described in connection with L 601 ,

[0393] xe611 to xe613 may each independently be the same as defined for xe1,

[0394] R 611to R 613 Can independently bind to R 601 Same as described, and

[0395] R 614 to R 616 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl and naphthyl.

[0396] In one embodiment, L in equation 601 601 and L in formula 601-1 611 To L 613 Can be independently selected from:

[0397] Phenylene, naphthylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrenylene, anthracenylene, fluoranthenylene, benzo[9,10]phenanthrenylene, pyrenylene, phenanthrenylene phenylene, perylene, pentaphenylene, hexaphenylene, pentaphenylene, thienylene, furylene, carbazolylene, indolylene, isoindolylene, benzofurylene, benzothiophenylene, dibenzofurylene, dibenzothiophenylene, benzocarbazolylene, dibenzocarbazolylene, dibenzothiophenylene, pyridylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isoxazolylene, thiadiazolylene, oxadiazolylene, pyrazinylene, pyrimidinylene, pyridazinylene, triazinylene, quinolinylene, isoquinolinylene, benzoquinolinylene, phthalazinylene, naphthyridinylene, quinoxalinylene, quinazolinylene, cinnolinylene, phenanthridinylene, acridinylene, phenanthrolinylene, phenazinylene, benzimidazolylene, isobenzothiazolylene, benzoxazolylene, isobenzoxazolylene, triazolylene, tetrazolylene, imidazopyridinylene, imidazopyrimidinylene, and azacarbazolylene; and

[0398] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, thiadiazolyl, oxadiazolyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazine at least one selected from the group consisting of phenylene, naphthylene, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl and azacarbazolyl, naphthylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrenylene, anthrylene, fluoranthenylene, benzo[9,10]phenanthrenylene, pyrenylene, pyrenylene phenylene, perylene, pentaphenylene, hexaphenylene, pentaphenylene, thienylene, furylene, carbazolylene, indolylene, isoindolylene, benzofurylene, benzothiophenylene, dibenzofurylene, dibenzothiophenylene, benzocarbazolylene, dibenzocarbazolylene, dibenzothiophenylene, pyridylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isoxazolylene, thiadiazolylene, oxadiazolylene , pyrazinylene, pyrimidinylene, pyridazinylene, triazinylene, quinolinylene, isoquinolinylene, benzoquinolinylene, phthalazinylene, naphthyridinylene, quinoxalinylene, quinazolinylene, cinnolinylene, phenanthridinylene, acridinylene, phenanthrolinylene, phenazinylene, benzimidazolylene, isobenzothiazolylene, benzoxazolylene, isobenzoxazolylene, triazolylene, tetrazolylene, imidazopyridinylene, imidazopyrimidinylene and azacarbazolylene,

[0399] However, the embodiments of the present disclosure are not limited thereto.

[0400] In one or more embodiments, xe1 in Formula 601 and xe611 to xe613 in Formula 601-1 may each independently be 0, 1, or 2.

[0401] In one or more embodiments, R in Equation 601 601 and R in formula 601-1 611 to R 613 Can be independently selected from:

[0402] Phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzo fluorenyl, dibenzo fluorenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl,

[0403] substituted with at least one selected from the group consisting of deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C 20 alkyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzo fluorenyl, dibenzo fluorenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzo fluorenyl, dibenzo fluorenyl, phenanthryl, anthryl, fluoranthenyl, benzo[9,10]phenanthryl, pyrenyl, phenyl, perylenyl, pentaphenyl, hexaphenyl, pentaphenyl, pentaphenyl, thiophenyl, furanyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, thiadiazolyl, oxadiazolyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolinyl, isoquinolinyl, benzoquinolinyl, phthalazinyl, naphthylidinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenoxazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl, and azacarbazolyl; and

[0404] -S(=O)2(Q 601 ) and -P(=O)(Q 601 )(Q 602 ), and

[0405] Q 601 and Q 602 are the same as described above.

[0406] The electron transport region can include at least one compound selected from compounds ET1 to ET36, but embodiments of the present disclosure are not limited thereto:

[0407]

[0408]

[0409]

[0410] In one or more embodiments, the electron transport region can include at least one selected from 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), Alq3, BAlq, 3-(biphenyl-4-yl)-5-(4-tert-butylphenyl)-4-phenyl-4H-1,2,4-triazole (TAZ), and NTAZ:

[0411]

[0412] The thickness of the buffer layer 141, the hole blocking layer, and the electron control layer can each be in the range of approximately to approximately , for example, approximately to approximately The thickness of the buffer layer 141, the hole blocking layer, and the electron control layer can be within a range of approximately 0.1 nm to approximately 10 nm, for example, within a range of approximately 0.5 nm to approximately 5 nm. When the thickness of the buffer layer 141, the hole blocking layer, and the electron control layer is within these ranges, the electron transport region can have excellent hole blocking characteristics or electron control characteristics without significantly increasing the driving voltage.

[0413] The thickness of the electron transport layer 142 can be within a range of approximately 0.1 nm to approximately 10 nm, for example, within a range of approximately 0.5 nm to approximately 5 nm. The thickness of the electron transport layer 142 can be within a range of approximately 0.1 nm to approximately 10 nm, for example, within a range of approximately 0.5 nm to approximately 5 nm. When the thickness of the electron transport layer 142 is within the ranges described above, the electron transport layer 142 can have suitable or satisfactory electron transport characteristics without significantly increasing the driving voltage.

[0414] In addition to the materials described above, the electron transport region (e.g., the electron transport layer 142 in the electron transport region) can include a metal-containing material.

[0415] The metal-containing material can include at least one selected from an alkali metal complex and an alkaline earth metal complex. The alkali metal complex can include a metal ion selected from a Li ion, a Na ion, a K ion, an Rb ion, and a Cs ion, and the alkaline earth metal complex can include a metal ion selected from a Be ion, a Mg ion, a Ca ion, an Sr ion, and a Ba ion. The ligand coordinated with the metal ion of the alkali metal complex or the alkaline earth metal complex can be selected from a hydroxyquinoline, a hydroxyisoquinoline, a hydroxybenzoquinoline, a hydroxyacridine, a hydroxyphenanthridine, a hydroxyphenyl-oxazole, a hydroxyphenyl-thiazole, a hydroxyphenyl-oxadiazole, a hydroxyphenyl-thiadiazole, a hydroxyphenyl-pyridine, a hydroxyphenyl-benzimidazole, a hydroxyphenyl-benzothiazole, a bipyridine, a phenanthroline, and a cyclopentadiene, but embodiments of the present disclosure are not limited thereto.

[0416] For example, the metal-containing material can include a Li complex. The Li complex can include, for example, a compound ET-D1 (lithium hydroxyquinoline, LiQ) or a compound ET-D2:

[0417]

[0418] The electron transport region can include an electron injection layer that facilitates injection of electrons from the second electrode 150. The electron injection layer can be in direct contact (e.g., physical contact) with the second electrode 150.

[0419] The electron injection layer can have: i) a single layer structure including a single layer including a single material; ii) a single layer structure including a single layer including a plurality of different materials; or iii) a multi-layer structure having a plurality of layers including a plurality of different materials.

[0420] ​​The electron injection layer can include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof.

[0421] The alkali metal can be selected from Li, Na, K, Rb, and Cs. In one embodiment, the alkali metal can be Li, Na, or Cs. In one or more embodiments, the alkali metal can be Li or Cs, although embodiments of the present disclosure are not limited thereto.

[0422] The alkaline earth metal can be selected from Mg, Ca, Sr, and Ba.

[0423] The rare earth metal can be selected from Sc, Y, Ce, Tb, Yb, and Gd.

[0424] The alkali metal compound, the alkaline earth metal compound, and the rare earth metal compound can be selected from oxides and halides (e.g., fluorides, chlorides, bromides, or iodides) of the alkali metal, the alkaline earth metal, and the rare earth metal.

[0425] The alkali metal compound can be selected from alkali metal oxides (such as Li2O, Cs2O, or K2O) and alkali metal halides (such as LiF, NaF, CsF, KF, LiI, NaI, CsI, or KI). In one embodiment, the alkali metal compound can be selected from LiF, Li2O, NaF, LiI, NaI, CsI, and KI, although embodiments of the present disclosure are not limited thereto.

[0426] The alkaline earth metal compound can be selected from alkaline earth metal oxides (such as BaO, SrO, CaO, Ba x Sr 1-x O (0 < x < 1) or Ba x Ca 1-x O (0 < x < 1)). In one embodiment, the alkaline earth metal compound can be selected from BaO, SrO, and CaO, although embodiments of the present disclosure are not limited thereto.

[0427] The rare earth metal compound can be selected from YbF3, ScF3, Sc2O3, Y2O3, Ce2O3, GdF3, and TbF3. In one embodiment, the rare earth metal compound can be selected from YbF3, ScF3, TbF3, YbI3, ScI3, and TbI3, although embodiments of the present disclosure are not limited thereto.

[0428] The alkali metal complex, the alkaline earth metal complex, and the rare earth metal complex can include ions of the alkali metal, the alkaline earth metal, and the rare earth metal as described above, and the ligand coordinated with the metal ion of the alkali metal complex, the alkaline earth metal complex, or the rare earth metal complex can be selected from hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyl-oxazole, hydroxyphenyl-thiazole, hydroxyphenyl-oxadiazole, hydroxyphenyl-thiadiazole, hydroxyphenyl-pyridine, hydroxyphenyl-benzimidazole, hydroxyphenyl-benzothiazole, bipyridine, phenanthroline, and cyclopentadiene, but embodiments of the present disclosure are not limited thereto.

[0429] As described above, the electron injection layer can be composed of (or can include) the alkali metal, the alkaline earth metal, the rare earth metal, the alkali metal compound, the alkaline earth metal compound, the rare earth metal compound, the alkali metal complex, the alkaline earth metal complex, the rare earth metal complex, or any combination thereof. In one or more embodiments, the electron injection layer can further include an organic material. When the electron injection layer further includes the organic material, the alkali metal, the alkaline earth metal, the rare earth metal, the alkali metal compound, the alkaline earth metal compound, the rare earth metal compound, the alkali metal complex, the alkaline earth metal complex, the rare earth metal complex, or any combination thereof can be uniformly or non-uniformly dispersed in a matrix including the organic material.

[0430] The thickness of the electron injection layer can be in the range of about to about , for example, in the range of about to about . When the thickness of the electron injection layer is in the range described above, the electron injection layer can have suitable or satisfactory electron injection characteristics without significantly increasing a driving voltage.

[0431] In addition, the electron injection layer can include a metal-containing material in addition to the materials described above.

[0432] The second electrode 150

[0433] The light emitting device 100 can include the first electrode 110 and the second electrode 150 facing the first electrode 110. The second electrode 150 can be a cathode as an electron injection electrode, in which case a material used to form the second electrode 150 can be selected from metals, alloys, electrically conductive compounds, and combinations thereof having a relatively low work function.

[0434] The second electrode 150 can include at least one selected from lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), ITO, and IZO, but embodiments of the present disclosure are not limited thereto. The second electrode 150 can be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.

[0435] The second electrode 150 can have a single layer structure or a multi-layer structure including two or more layers.

[0436] For example, the first electrode 110 can be an anode, and the second electrode 150 can be a cathode. Here, the anode can be reflective or semi-transmissive.

[0437] Figure 2 Description

[0438] Figure 2 is a schematic cross-sectional view of a light emitting device 200 according to another embodiment.

[0439] Reference Figure 2 According to another embodiment, the light emitting device 200 can include a plurality of first electrodes 210 located in a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3, a second electrode 250 facing the plurality of first electrodes 210, a first emission layer 230a located in the first sub-pixel SP1 and configured to emit first color light, a second emission layer 230b located in the second sub-pixel SP2 and configured to emit second color light, a first layer 230c integrated with respect to the first sub-pixel SP1, the second sub-pixel SP2, and the third sub-pixel SP3, a first auxiliary layer 230' located between the first layer 230c and the first emission layer 230a, and a first intermediate layer 231 located between the first auxiliary layer 230' and the first emission layer 230a, wherein an absolute value of a HOMO energy level of the first intermediate layer 231 can be greater than an absolute value of a HOMO energy level of the first auxiliary layer 230' and less than an absolute value of a HOMO energy level of the first emission layer 230a. In addition, an absolute value of a LUMO energy level of the first intermediate layer 231 can be greater than an absolute value of a LUMO energy level of the first auxiliary layer 230' and less than an absolute value of a LUMO energy level of the first emission layer 230a, the first emission layer 230a can include a first host and a first dopant, and a FWHM of light emitted from the first dopant can be about 35 nm or more.

[0440] In addition, in one embodiment, the light emitting device 200 can further include a second intermediate layer 232 between the first layer 230c and the second emission layer 230b, and can further include a third intermediate layer 233 between the first electrode 210 and the first layer 230c.

[0441] In addition, in one embodiment, the light-emitting device 200 may further include at least one selected from a hole injection layer 221 and a hole transport layer between the first electrode 210 and the first layer 230c. The light-emitting device 200 may further include at least one selected from an electron injection layer and an electron transport layer 242 between the first emission layer 230a and the second electrode 250 and between the second emission layer 230b and the second electrode 250, and may further include a buffer layer 241 between the first emission layer 230a and the second electrode 250 and between the second emission layer 230b and the second electrode 250.

[0442] Figure 2 The first electrode 210, the second electrode 250, the first emission layer 230a, the second emission layer 230b, the first layer 230c, the first auxiliary layer 230', the first intermediate layer 231, the second intermediate layer 232, the third intermediate layer 233, the electron transport layer 242 and the buffer layer 241 can all be independently the same as those described above. Figure 1 The corresponding features are the same as described.

[0443] In some embodiments, Figure 2 The light emitting device 200 and Figure 1 The light emitting device 100 shown in FIG. 1 is different in structure in that it further includes a fourth intermediate layer 234 as an additional intermediate layer.

[0444] In some embodiments, the light emitting device 200 may further include a fourth intermediate layer 234 between the first intermediate layer 231 and the first emission layer 230a. In this case, the absolute value of the HOMO energy level of the fourth intermediate layer 234 may be greater than the absolute value of the HOMO energy level of the first intermediate layer 231 and smaller than the absolute value of the HOMO energy level of the first emission layer 230a, and the absolute value of the LUMO energy level of the fourth intermediate layer 234 may be greater than the absolute value of the LUMO energy level of the first intermediate layer 231 and smaller than the absolute value of the LUMO energy level of the first emission layer 230a.

[0445] Can be compared with Figure 1 The description of the first to third intermediate layers 131 to 133 is provided to understand the fourth intermediate layer 234 .

[0446] In one embodiment, the area of ​​the first layer 230c corresponding to the third sub-pixel SP3 may be configured to emit a third color light, and

[0447] A resonance order of one selected from the first color light, the second color light, and the third color light may be different from resonance orders of the other two of the first color light, the second color light, and the third color light.

[0448] In one embodiment, the region in the first layer 230c corresponding to the third sub-pixel SP3 can emit third color light, and

[0449] The resonance order of the first color light can be greater than or equal to the resonance orders of the second color light and the third color light.

[0450] For example, i) the resonance order of the first color light is second order, and the resonance orders of the second color light and the third color light are first order; ii) the resonance order of the first color light is third order, and the resonance orders of the second color light and the third color light are second order; or iii) the resonance order of the first color light is second order, the resonance order of the second color light is second order, and the resonance order of the third color light is first order.

[0451] In one embodiment, the first color light can be blue light, the second color light can be red light, and the region in the first layer 230c corresponding to the third sub-pixel SP3 can be configured to emit green light.

[0452] In one or more embodiments, the first color light can be red light, the second color light can be blue light, and the region in the first layer 230c corresponding to the third sub-pixel SP3 can be configured to emit green light.

[0453] In one or more embodiments, the first color light can be green light, the second color light can be red light, and the region in the first layer 230c corresponding to the third sub-pixel SP3 can be configured to emit blue light.

[0454] In one or more embodiments, the first color light can be red light, the second color light can be green light, and the region in the first layer 230c corresponding to the third sub-pixel SP3 can be configured to emit blue light.

[0455] In one or more embodiments, the first color light can be blue light, the second color light can be green light, and the region in the first layer 230c corresponding to the third sub-pixel SP3 can be configured to emit red light.

[0456] In one or more embodiments, the first color light can be green light, the second color light can be blue light, and the region in the first layer 230c corresponding to the third sub-pixel SP3 can be configured to emit red light.

[0457] Layers included in the light emitting device can each be formed by using one or more suitable methods selected from vacuum deposition, spin coating, casting, LB method, inkjet printing, laser printing, and laser-induced thermal imaging.

[0458] When the layers included in the light-emitting device are each formed by vacuum deposition, vacuum deposition can be performed at a deposition temperature of about 100°C to about 500°C, a vacuum degree of about 10 -8 torr to about 10 -3 torr, and a deposition rate of about torr to about torr, and a deposition rate of about

[0459] When the layers included in the light-emitting device are each formed by spin coating, spin coating can be performed, for example, at a coating rate of about 2000 rpm to about 5000 rpm and at a temperature of about 80°C to about 200°C by taking into account the compound used for the layer to be spin coated and the structure of the layer to be formed.

[0460] The term "C1-C 60 alkyl" as used herein refers to a straight-chain or branched aliphatic saturated hydrocarbon monovalent radical having 1 to 60 carbon atoms, examples of which include methyl, ethyl, propyl, isobutyl, sec-butyl, t-butyl, pentyl, isopentyl, and hexyl. The term "C1-C 60 alkylene" as used herein refers to a divalent radical having essentially the same structure as a C1-C 60 alkyl group.

[0461] The term "C6-C 60 aryl" as used herein refers to a monovalent radical having a carbocyclic aromatic system including 6 to 60 carbon atoms. The term "C6-C 60 arylene" as used herein refers to a divalent radical having a carbocyclic aromatic system including 6 to 60 carbon atoms. Non-limiting examples of C6-C 60 aryl groups include phenyl, naphthyl, anthryl, phenanthryl, pyrenyl, and yl. When the C6-C 60 aryl and C6-C 60 arylene each include two or more rings, the rings can be fused (e.g., bonded together).

[0462] The term "C1-C 60 heteroaryl" as used herein refers to a monovalent radical having a heterocyclic aromatic system having at least one heteroatom selected from N, O, Si, P, and S as a ring-forming atom in addition to 1 to 60 carbon atoms. The term "C1-C 60 heteroarylene" as used herein refers to a divalent radical having a heterocyclic aromatic system having at least one heteroatom selected from N, O, Si, P, and S as a ring-forming atom in addition to 1 to 60 carbon atoms. Non-limiting examples of C1-C 60Non-limiting examples of heteroaryl groups include pyridyl, pyrimidyl, pyrazinyl, pyridazinyl, triazinyl, quinolinyl, and isoquinolinyl. When C1-C 60 heteroaryl groups and C1-C 60 When heteroarylene groups comprise two or more rings, the rings can be condensed (e.g., joined together) with one another.

[0463] The term "monovalent non-aromatic condensed polycyclic group," as used herein, refers to a monovalent group having two or more rings condensed (e.g., joined together) with one another, only carbon atoms (e.g., having 8 to 60 carbon atoms) as ring-forming atoms, and no aromaticity in its entire molecular structure (e.g., the entire molecular structure is not aromatic). An example of a monovalent non-aromatic condensed polycyclic group is fluorenyl. The term "divalent non-aromatic condensed polycyclic group," as used herein, refers to a divalent group having essentially the same structure as a monovalent non-aromatic condensed polycyclic group.

[0464] The term "monovalent non-aromatic condensed polycyclic group," as used herein, refers to a monovalent group having two or more rings condensed (e.g., joined together) with one another, only carbon atoms (e.g., having 8 to 60 carbon atoms) as ring-forming atoms, and no aromaticity in its entire molecular structure (e.g., the entire molecular structure is not aromatic). An example of a monovalent non-aromatic condensed polycyclic group is fluorenyl. The term "divalent non-aromatic condensed polycyclic group," as used herein, refers to a divalent group having essentially the same structure as a monovalent non-aromatic condensed polycyclic group.

[0465] The term "C5-C 60 carbocyclyl" refers to a monocyclic or polycyclic group having 5 to 60 carbon atoms, wherein the ring-forming atoms are only carbon atoms. The term "C5-C 60 carbocyclyl" refers to an aromatic carbocyclyl group or a non-aromatic carbocyclyl group. C5-C 60 The C5-C 60 carbocyclyl can be a ring (such as benzene), a monovalent group (such as phenyl), or a divalent group (such as phenylene). In one or more embodiments, depending on the number of substituents attached to the C5-C 60 The C5-C

[0466] The term "C1-C 60 heterocyclyl" refers to a group having essentially the same structure as a C5-C 60 carbocyclyl group, except that at least one heteroatom selected from N, O, Si, P, and S is used as a ring-forming atom in addition to carbon (the number of carbon atoms can range from 1 to 60).

[0467] In the present specification, substituted C5-C 60 carbocyclyl, substituted C1-C 60 heterocyclyl, substituted C1-C 20 alkylene, substituted C2-C 20 alkenylene, substituted C3-C 10 cycloalkylene, substituted C1-C 10 heterocycloalkylene, substituted C3-C 10 cycloalkenylene, substituted C1-C 10 heterocycloalkenylene, substituted C6-C 60 arylene, substituted C1-C 60 heteroarylene, substituted bivalent non-aromatic condensed polycyclyl, substituted bivalent non-aromatic condensed heteropolycyclyl, substituted C1-C 60 alkyl, substituted C2-C 60 alkenyl, substituted C2-C 60 alkynyl, substituted C1-C 60 alkoxy, substituted C3-C 10 cycloalkyl, substituted C1-C 10 heterocycloalkyl, substituted C3-C 10 cycloalkenyl, substituted C1-C 10 heterocycloalkenyl, substituted C6-C 60 aryl, substituted C6-C 60 aryloxy, substituted C6-C 60 arlysulfanyl, substituted C1-C 60 heteroaryl, substituted monovalent non-aromatic condensed polycyclyl and substituted monovalent non-aromatic condensed heteropolycyclyl can be selected from:

[0468] deuterium, -F, -CI, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl and C1-C 60 alkoxy;

[0469] all of which are substituted with from one to five substituents selected from the group consisting of deuterium, -F, -CI, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazone, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C6-C 60 aryloxy, C6-C 60 arlysulfanyl, C1-C 60heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 ), -N(Q 11 )(Q 12 ), -B(Q 11 )(Q 12 ), -C(=O)(Q 11 ), -S(=O)2(Q 11 ), and -P(=O)(Q 11 )(Q 12 ) selected from at least one of C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, and C1-C 60 alkoxy groups;

[0470] C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C6-C 60 aryloxy, C6-C 60 arylthio, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, and monovalent non-aromatic condensed heteropolycyclic group;

[0471] all of which are substituted with from one to three groups selected from deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C6-C 60 aryloxy, C6-C 60 arylthio, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 ), -N(Q 21 )(Q 22 ), -B(Q 21 )(Q 22), -C(=O)(Q 21 ), -S(=O)2(Q 21 ), and -P(=O)(Q 21 )(Q 22 ) can each independently be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C 60 aryloxy, C6-C 60 arylthio, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, and monovalent non-aromatic condensed heteropolycyclic group; and

[0472] -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 ), and -P(=O)(Q 31 )(Q 32 ), and

[0473] Q 11 to Q 13 , Q 21 to Q 23 , and Q 31 to Q 33 may each independently be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazino, hydrazono, C1-C 60 alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl, C1-C 60 alkoxy, C3-C 10 cycloalkyl, C1-C 10 heterocycloalkyl, C3-C 10 cycloalkenyl, C1-C 10 heterocycloalkenyl, C6-C 60 aryl, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, biphenyl, and terphenyl.

[0474] The term "biphenyl" as used herein refers to "a phenyl substituted with a phenyl." In other words, "biphenyl" is a C6-C60 A phenyl group substituted with an aryl group as a substituent.

[0475] As used herein, the term "terphenyl" refers to a "phenyl group substituted with a biphenyl group". In other words, a "terphenyl group" is a group having a C6-C 60 C6-C 60 A phenyl group substituted with an aryl group as a substituent.

[0476] Unless otherwise defined, * and *' as used herein refer to the binding sites to adjacent atoms in the corresponding formula.

[0477] Example

[0478] In Examples and Comparative Examples, materials used for the hole injection layer, hole transport layer, organic emission layer, electron transport layer, electron injection layer, auxiliary layer, and intermediate layer correspond to compounds satisfying the description herein for each layer.

[0479] Example 1

[0480] Corning 15Ω / cm 2 The ITO glass substrate was cut into a size of 50 mm × 50 mm × 0.7 mm, ultrasonicated with isopropyl alcohol and pure water for 5 minutes each, and then cleaned by exposure to ultraviolet rays and ozone for 30 minutes.

[0481] HT3 and HAT-CN were co-deposited on an ITO glass substrate at a weight ratio of 99:1. The thickness of HT3 is deposited thereon. thickness to form a A hole injection layer with a total thickness of 1000 nm was formed, and m-MTDATA was vacuum-deposited on the hole injection layer to form a hole injection layer having a thickness of 1000 nm. The hole transport layer has a thickness of .

[0482] CBP (host) and Ir(ppy)3 (green dopant) were co-deposited on the hole transport layer in a weight ratio of 94:6 to form a A green emission layer with a thickness of 500 nm serves as a common layer.

[0483] Then, HT3 and m-MTDATA were co-deposited on the green emission layer in the blue sub-pixel area at a weight ratio of 99:1. and additionally depositing HT3 thereon to to form a first auxiliary layer, and HAT-CN is deposited on the first auxiliary layer to form a A first intermediate layer with a thickness of 100 nm was prepared, and CBP (host) and an arylamine compound BD1 (FD14, FWHM: 35 nm) (blue dopant) were co-deposited on the first intermediate layer at a weight ratio of 97:3 to form a film having The thickness of the blue emission layer.

[0484] The absolute values ​​of the HOMO and LUMO levels of the first auxiliary layer, the first intermediate layer, and the blue emission layer are as follows:

[0485] First auxiliary layer: HOMO = -5.14 eV, LUMO = -1.82 eV;

[0486] First intermediate layer: HOMO = -5.37 eV, LUMO = -2.10 eV; and

[0487] Blue emission layer: HOMO = -5.61 eV, LUMO = -2.49 eV.

[0488] Then, HAT-CN is deposited on the green emission layer in the red sub-pixel region to form a A second intermediate layer having a thickness of 100 nm and CBP (host) and Ir (btp) 2 (acac) (red dopant) are co-deposited on the second intermediate layer in a weight ratio of 97:3 to form a The thickness of the red emission layer.

[0489] At this time, the red emission layer and the green emission layer emit light of the first-order resonance, and the blue emission layer emits light of the second-order resonance.

[0490] BAlq is deposited on the emission layer to to provide a hole blocking layer, and co-depositing Alq3 and LiQ thereon in a weight ratio of 1:1 to form a The thickness of the electron transport layer is .

[0491] Yb is deposited on the electron transport layer to form a An electron injection layer having a thickness of 1000 nm was formed, and Ag and Mg were co-deposited thereon in a weight ratio of 9:1 to form a A cathode having a thickness of 1000 nm was formed to form a Yb / Ag:Mg electrode. In this way, a light-emitting device was manufactured.

[0492] Comparative Example 1

[0493] A light emitting device was produced in substantially the same manner as in Example 1, except that BD2 (5,9-diphenyl-5H,9H-[l,4]benzazaborino[2,3,4-kl]phenazaborine, (FWHM: 30 nm)) was used as a blue dopant.

[0494] <bd2>

[0495]

[0496] Evaluation Example 1

[0497] The change in luminance according to angle in the red emission layer, the green emission layer, and the blue emission layer in the light-emitting device manufactured according to Example 1 and in the entire light-emitting device (based on the luminance at 0° (100%)) was measured, and the results are shown in Table 1. For the light-emitting device manufactured according to Comparative Example 1, the change in luminance according to angle was also measured, and the results are shown in Table 2. In addition, the luminance of the blue dopant BD1 of the light-emitting device manufactured according to Example 1 at 0° and 60° was measured, and the results are shown in Table 2. Figure 3 The luminance of the blue dopant BD2 of the light emitting device manufactured according to Comparative Example 1 at 0° and 60° was measured, and the results are shown in FIG. Figure 4 middle.

[0498] Table 1

[0499]

[0500] Table 2

[0501]

[0502] Refer to Table 1 and Table 2 and Figure 3 and Figure 4 It can be seen that in the case of Example 1 in which a blue dopant BD1 configured to emit light with a wide FWHM is adopted, the decrease in brightness in the blue emission layer according to the angle is reduced, and the decrease in brightness in the entire light-emitting device according to the angle is reduced compared to the case of Comparative Example 1, which is beneficial or advantageous for ensuring a wide viewing angle.

[0503] Evaluation Example 2

[0504] The electroluminescence spectra of the light emitting devices manufactured according to Example 1 and Comparative Example 1 were measured, and the results are shown in FIG. Figure 5 In. From Figure 5 It can be seen that the light emitting device manufactured according to Example 1 has excellent luminance compared with the light emitting device manufactured according to Comparative Example 1.

[0505] Example 2

[0506] Corning 15Ω / cm 2 ITO glass substrates were cut to a size of 50 mm x 50 mm x 0.7 mm, cleaned using isopropanol and pure water each for 5 minutes by ultrasonic, and then by exposure to ultraviolet light and ozone for 30 minutes. Then, the ITO glass substrates were provided to a vacuum deposition apparatus.

[0507] HT3 and HAT-CN were co-deposited on the ITO glass substrate in a weight ratio of 99:1 to a thickness of and HT3 was additionally deposited thereon to a thickness of to form a hole injection layer having a total thickness of and m-MTDATA was vacuum-deposited on the hole injection layer to form a hole transport layer having a thickness of .

[0508] CBP (host) and Ir(ppy)3 (green dopant) were co-deposited on the hole transport layer in a weight ratio of 94:6 to form a green emission layer having a thickness of as a common layer.

[0509] Then, HT3 and m-MTDATA were co-deposited on the green emission layer in the blue sub-pixel region in a weight ratio of 99:1 to a thickness of and HT3 was additionally deposited thereon to a thickness of to form a first auxiliary layer, HAT-CN was deposited on the first auxiliary layer to form a first intermediate layer having a thickness of and CBP (host) and arylamine compound BD1 (FD14, FWHM: 35 nm) (blue dopant) were co-deposited on the first intermediate layer in a weight ratio of 97:3 to form a blue emission layer having a thickness of .

[0510] The absolute values of the HOMO energy level and the LUMO energy level of the first auxiliary layer, the first intermediate layer, and the blue emission layer were as follows:

[0511] First auxiliary layer: HOMO = -5.14 eV, LUMO = -1.82 eV;

[0512] First intermediate layer: HOMO = -5.37 eV, LUMO = -2.10 eV; and

[0513] Blue emission layer: HOMO = -5.61 eV, LUMO = -2.49 eV.

[0514] Then, HAT-CN was deposited on the green emission layer in the red sub-pixel region to form a first intermediate layer having a thickness of a second intermediate layer of thickness 20 nm, and co-deposited CBP (host) and Ir(btp)2(acac) (red dopant) in a weight ratio of 97:3 on the second intermediate layer to form a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm.

[0515] At this point, the red emissive layer and the green emissive layer emit light of first order resonance, while the blue emissive layer emits light of second order resonance.

[0516] On the emissive layer, BAlq was deposited to a thickness of 20 nm to provide a hole blocking layer, and on this, Alq3 and LiQ were co-deposited in a weight ratio of 1 : 1 to form an electron transport layer of thickness 20 nm. a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm.

[0517] On the electron transport layer, Yb was deposited to form an electron injection layer of thickness 20 nm, and on this, Ag and Mg were co-deposited in a weight ratio of 9: 1 to form a cathode of thickness 20 nm, thereby forming a Yb / Ag:Mg electrode. In this way, a light emitting device was manufactured. a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm.

[0518] Comparative Example 2

[0519] Corning 15 Ω / cm2as an anode was cut to a size of 50 mm x 50 mm x 0.7 mm, cleaned using isopropanol and pure water each for 5 minutes, and then cleaned by exposure to ultraviolet light and ozone for 30 minutes. Then, the ITO glass substrate was provided to a vacuum deposition apparatus. 2 The ITO glass substrate was cut to a size of 50 mm x 50 mm x 0.7 mm, cleaned using isopropanol and pure water each for 5 minutes, and then cleaned by exposure to ultraviolet light and ozone for 30 minutes. Then, the ITO glass substrate was provided to a vacuum deposition apparatus.

[0520] On the ITO glass substrate, HT3 and HAT-CN were co-deposited in a weight ratio of 99: 1 to a thickness of 20 nm, and on this, HT3 was deposited to a thickness of 20 nm to form a hole injection layer of total thickness 40 nm. a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm.

[0521] On the hole transport layer, CBP (host) and BD1 (blue dopant) were co-deposited in a weight ratio of 97:3 to form a blue emissive layer of thickness 20 nm as a common layer. a red emissive layer of thickness 20 nm.

[0522] Then, m-MTDATA was additionally deposited on the blue emissive layer in the green sub-pixel region to form a hole transport layer of thickness 20 nm. An auxiliary layer of a thickness of 1000 nm was formed, and CBP (host) and Ir(ppy)3 (green dopant) were co-deposited on the auxiliary layer in a weight ratio of 94:6 to form a The thickness of the green emission layer.

[0523] Then, HAT-CN is deposited on the blue emission layer in the red sub-pixel region to form a A second intermediate layer having a thickness of 100 nm and CBP (host) and Ir (btp) 2 (acac) (red dopant) are co-deposited on the second intermediate layer in a weight ratio of 97:3 to form a The thickness of the red emission layer.

[0524] At this time, the red emission layer and the blue emission layer emit light of the first-order resonance, and the green emission layer emits light of the second-order resonance.

[0525] BAlq is deposited on the emission layer to to provide a hole blocking layer, and co-depositing Alq3 and LiQ thereon in a weight ratio of 1:1 to form a The thickness of the electron transport layer.

[0526] Yb is deposited on the electron transport layer to form a An electron injection layer having a thickness of 1000 nm was formed, and Ag and Mg were co-deposited thereon in a weight ratio of 9:1 to form a A cathode having a thickness of 1000 nm was formed to form a Yb / Ag:Mg electrode. In this way, a light-emitting device was manufactured.

[0527] Evaluation Example 3

[0528] The light emitting spectra of the light emitting devices manufactured according to Example 2 and Comparative Example 2 were measured, and the results are shown in FIG. Figure 6 middle.

[0529] Reference Figure 6 In the case of the light-emitting device of Comparative Example 2, in which a blue common layer is used, the resonance distance is not matched, and light emission occurs in the green light emission region (500 nm to 550 nm) when emitting blue light, unlike the light-emitting device of Example 2. Therefore, in Comparative Example 2, the light-emitting efficiency in the light-emitting device decreases and the brightness increases according to the change in angle.

[0530] Example 3

[0531] Corning 15Ω / cm 2 ITO glass substrates were cut to a size of 50 mm x 50 mm x 0.7 mm, cleaned using isopropanol and pure water each for 5 minutes by ultrasonication, and then by exposure to ultraviolet light and ozone for 30 minutes. Then, the ITO glass substrates were provided to a vacuum deposition apparatus.

[0532] HT3 and HAT-CN were co-deposited on the ITO glass substrate in a weight ratio of 99:1 to a thickness of and HT3 was additionally deposited thereon to a thickness of to form a hole injection layer having a total thickness of and m-MTDATA was vacuum-deposited on the hole injection layer to form a hole transport layer having a thickness of

[0533] CBP (host) and Ir(ppy)3 (green dopant) were co-deposited on the hole transport layer in a weight ratio of 94:6 to form a green emission layer having a thickness of as a common layer.

[0534] Then, HT3 and m-MTDATA were co-deposited on the green emission layer in the blue sub-pixel region in a weight ratio of 99:1 to a thickness of and HT3 was additionally deposited thereon to a thickness of to form a first auxiliary layer, HAT-CN was deposited on the first auxiliary layer to form a first intermediate layer having a thickness of and CBP (host) and arylamine compound BD1 (FD14, FWHM: 35 nm) (blue dopant) were co-deposited on the first intermediate layer in a weight ratio of 97:3 to form a blue emission layer having a thickness of

[0535] The absolute values of the HOMO energy level and the LUMO energy level of the first auxiliary layer, the first intermediate layer, and the blue emission layer were as follows:

[0536] First auxiliary layer: HOMO = -5.14 eV, LUMO = -1.82 eV;

[0537] First intermediate layer: HOMO = -5.37 eV, LUMO = -2.10 eV; and

[0538] Blue emission layer: HOMO = -5.61 eV, LUMO = -2.49 eV.

[0539] Then, HAT-CN was deposited on the green emission layer in the red sub-pixel region to form a first intermediate layer having a thickness of ​​a second intermediate layer of thickness 20 nm, and co-deposited CBP (host) and Ir(btp)2(acac) (red dopant) in a weight ratio of 97:3 on the second intermediate layer to form a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm.

[0540] At this point, the red emissive layer and the green emissive layer emit light of first order resonance, while the blue emissive layer emits light of second order resonance.

[0541] BAlq was deposited on the emissive layer to a thickness of 30 nm to provide a hole blocking layer, and Alq3 and LiQ were co-deposited in a weight ratio of 1 : 1 thereon to form an electron transport layer of thickness 20 nm. a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm.

[0542] Yb was deposited on the electron transport layer to form an electron injection layer of thickness 20 nm, and Ag and Mg were co-deposited in a weight ratio of 9: 1 thereon to form a cathode of thickness 200 nm, thereby forming a Yb / Ag:Mg electrode. In this way, a light emitting device was fabricated. a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm, thereby forming a Yb / Ag:Mg electrode. In this way, a light emitting device was fabricated.

[0543] Example 4 (example in which a low refractive index electron transport layer (ETL) is employed)

[0544] Corning 15 Ω / cm2ITO glass substrate was used as anode and cleaned by ultrasonic treatment in isopropanol and pure water for 5 minutes each, followed by cleaning by exposure to ultraviolet light and ozone for 30 minutes. The ITO glass substrate was then provided to a vacuum deposition apparatus. 2 The ITO glass substrate was cut to a size of 50 mm x 50 mm x 0.7 mm, and cleaned by ultrasonic treatment in isopropanol and pure water for 5 minutes each, followed by cleaning by exposure to ultraviolet light and ozone for 30 minutes. The ITO glass substrate was then provided to a vacuum deposition apparatus.

[0545] HT3 and HAT-CN were co-deposited on the ITO glass substrate in a weight ratio of 99: 1 to a thickness of 20 nm, and HT3 was deposited thereon to a thickness of 20 nm to form a hole injection layer of total thickness 40 nm, and m-MTDATA was vacuum deposited on the hole injection layer to form a hole transport layer of thickness 20 nm. a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm. a red emissive layer of thickness 20 nm.

[0546] CBP (host) and Ir(ppy)3 (green dopant) were co-deposited on the hole transport layer in a weight ratio of 94:6 to form a green emissive layer of thickness 20 nm as a common layer. a red emissive layer of thickness 20 nm.

[0547] HT3 and m-MTDATA were then co-deposited on the green emissive layer in the blue sub-pixel region in a weight ratio of 99: 1 to a thickness of 20 nm, and additionally HT3 was deposited thereon to a thickness of 20 nm to form a hole transport layer of thickness 40 nm. a red emissive layer of thickness 20 nm. thickness to form a first auxiliary layer, depositing HAT-CN on the first auxiliary layer to form a first intermediate layer having a thickness of 5 nm, and co-depositing CBP (host) and an arylamine compound BD1 (FD14, FWHM: 35 nm) (blue dopant) on the first intermediate layer in a weight ratio of 97:3 to form a blue emission layer having a thickness of 5 nm. thickness to form a first intermediate layer, and co-depositing CBP (host) and an arylamine compound BD1 (FD14, FWHM: 35 nm) (blue dopant) on the first intermediate layer in a weight ratio of 97:3 to form a blue emission layer having a thickness of 5 nm. thickness to form a first intermediate layer, and co-depositing CBP (host) and an arylamine compound BD1 (FD14, FWHM: 35 nm) (blue dopant) on the first intermediate layer in a weight ratio of 97:3 to form a blue emission layer having a thickness of 5 nm.

[0548] The absolute values of the HOMO energy level and the LUMO energy level of the first auxiliary layer, the first intermediate layer, and the blue emission layer were as follows:

[0549] First auxiliary layer: HOMO = -5.14 eV, LUMO = -1.82 eV;

[0550] First intermediate layer: HOMO = -5.37 eV, LUMO = -2.10 eV; and

[0551] Blue emission layer: HOMO = -5.61 eV, LUMO = -2.49 eV.

[0552] Then, HAT-CN was deposited on the green emission layer in the red sub-pixel region to form a second intermediate layer having a thickness of 5 nm, and CBP (host) and Ir(btp)2(acac) (red dopant) were co-deposited on the second intermediate layer in a weight ratio of 97:3 to form a red emission layer having a thickness of 5 nm. thickness to form a first intermediate layer, and co-depositing CBP (host) and an arylamine compound BD1 (FD14, FWHM: 35 nm) (blue dopant) on the first intermediate layer in a weight ratio of 97:3 to form a blue emission layer having a thickness of 5 nm. thickness to form a first intermediate layer, and co-depositing CBP (host) and an arylamine compound BD1 (FD14, FWHM: 35 nm) (blue dopant) on the first intermediate layer in a weight ratio of 97:3 to form a blue emission layer having a thickness of 5 nm.

[0553] At this time, the red emission layer and the green emission layer emitted light of the first-order resonance, and the blue emission layer emitted light of the second-order resonance.

[0554] BAlq was deposited on the emission layer to a thickness of 20 nm to provide a hole blocking layer, and 3TPYMB was deposited thereon to form an electron transport layer having a thickness of 20 nm. BAlq was deposited on the emission layer to a thickness of 20 nm to provide a hole blocking layer, and 3TPYMB was deposited thereon to form an electron transport layer having a thickness of 20 nm. BAlq was deposited on the emission layer to a thickness of 20 nm to provide a hole blocking layer, and 3TPYMB was deposited thereon to form an electron transport layer having a thickness of 20 nm.

[0555]

[0556] Yb was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 nm, and Ag and Mg were co-deposited thereon in a weight ratio of 9:1 to form a cathode having a thickness of 100 nm, thereby forming a Yb / Ag:Mg electrode. In this way, a light emitting device was manufactured. Evaluation Example 4

[0557]

[0558] Figure 7 ​​is a graph showing green emission color coordinates-efficiency of the light emitting device manufactured according to Example 3 and Example 4.

[0559] Referring to Figure 7 As can be seen, the efficiency of the light emitting device manufactured according to Example 4 is higher than that of the light emitting device manufactured according to Example 3.

[0560] According to one or more embodiments, a light emitting device in which a driving voltage is lowered and luminance is increased can be implemented. However, the scope of the disclosure is not limited by such effects.

[0561] It is to be understood that the embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should be regarded as being applicable to other similar features or aspects in other embodiments.

[0562] For ease of explanation, spatially relative terms such as "under", "below", "lower", "on", "above", "upper", and the like, can be used herein for describing the orientation of one element or feature to another element or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "under" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0563] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Expressions such as "at least one of," when preceding the

[0564] As used herein, the terms "substantially", "approximately", and similar terms, are used as terms of approximation and not as terms of degree, and are intended to account for the inherent errors in measurements or calculations that would be recognized by those of ordinary skill in the art. Moreover, the use of "may" in describing embodiments of the disclosure indicates that one or more embodiments of the disclosure. As used herein, the term "use" and variations thereof can be considered synonymous with the term "utilize" and variations thereof, respectively. Furthermore, the term "exemplary" is intended to mean an example or illustration.

[0565] Further, any numerical ranges recited herein are intended to include all sub-ranges of the same whole number recited as the upper limit and to include all sub-ranges of the same whole number recited as the lower limit, in relation to the same entire number recited as the upper limit. As an illustration, a range of "1.0 to 10.0" is intended to include all sub-ranges, for example, 2.4 to 7.6, 5.1 to 10.0, 9.1 to 1.0, 1.1 to 6.9, and so forth. Any maximum numerical limitation recited herein is intended to include all lower numerical limitations subsumed therein and any minimum numerical limitation recited in this specification is intended to include all higher numerical limitations subsumed therein. Accordingly, Applicant reserves the right to amend this specification, including the claims, to expressly recite any sub-range included in the ranges expressly recited in this specification, as set forth above.

[0566] While one or more embodiments have been described with reference to the attached drawings, it will be understood by those skilled in the art that various changes can be made in form and details without departing from the spirit and scope of the disclosure as defined by the claims and their equivalents.

Claims

1. A light-emitting device, comprising: A plurality of first electrodes are respectively located in the first sub-pixel, the second sub-pixel and the third sub-pixel; a second electrode facing the plurality of first electrodes; a first emission layer, located in the first sub-pixel and configured to emit a first color light; a second emission layer, located in the second sub-pixel and configured to emit a second color light; a first layer, being integrated with respect to the first sub-pixel, the second sub-pixel, and the third sub-pixel; a first auxiliary layer, located between the first layer and the first emitting layer; as well as a first intermediate layer, located between the first auxiliary layer and the first emitting layer; The absolute value of the highest occupied molecular orbital energy level of the first intermediate layer is greater than the absolute value of the highest occupied molecular orbital energy level of the first auxiliary layer and smaller than the absolute value of the highest occupied molecular orbital energy level of the first emission layer. The absolute value of the lowest unoccupied molecular orbital energy level of the first intermediate layer is greater than the absolute value of the lowest unoccupied molecular orbital energy level of the first auxiliary layer and smaller than the absolute value of the lowest unoccupied molecular orbital energy level of the first emission layer. The first emission layer includes a first host and a first dopant, The first dopant is configured to emit light having a full width at half maximum of 35 nm or greater, and The first dopant is a compound represented by Formula 501, and The area in the first layer corresponding to the third sub-pixel is configured to emit light of a third color: Formula 501 Wherein, in formula 501, Ar 501 is substituted or unsubstituted C5-C 60 Carbocyclic or substituted or unsubstituted C1-C 60 Heterocyclyl, L 501 To L 503 are independently selected from substituted or unsubstituted C3-C 10 Cycloalkylene, substituted or unsubstituted C1-C 10 Heterocycloalkylene, substituted or unsubstituted C3-C 10 Cycloalkenylene, substituted or unsubstituted C1-C 10 Heterocycloalkenylene, substituted or unsubstituted C6-C 60 Arylene, substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group, xd1 to xd3 are each independently an integer from 0 to 3, R 501 and R 502 are independently selected from substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, and xd4 is an integer from 1 to 6.

2. The light emitting device according to claim 1, wherein: The first dopant is configured to emit light having a full width at half maximum in a range of 35 nm to 50 nm.

3. The light emitting device according to claim 1, wherein: The first intermediate layer includes a p-dopant or includes a single film including a p-dopant.

4. The light emitting device according to claim 1, wherein: The first auxiliary layer includes a hole transport compound. The light emitting device according to claim 1 , further comprising a second intermediate layer between the first layer and the second emission layer. The light emitting device according to claim 1 , further comprising a third intermediate layer between the plurality of first electrodes and the first layer. The light emitting device according to claim 1 , further comprising a fourth intermediate layer between the first intermediate layer and the first emission layer. The light emitting device according to claim 1 , further comprising at least one selected from an electron injection layer and an electron transport layer between the first emission layer and the second electrode and between the second emission layer and the second electrode.

9. The light emitting device according to claim 8, wherein: At least one selected from the electron injection layer and the electron transport layer includes a compound represented by Formula 1: Formula 1 In formula 1, L 11 To L 13 are independently selected from substituted or unsubstituted C5-C 60 Carbocyclic group and substituted or unsubstituted C1-C 60 heterocyclic group, a11 to a13 are independently selected from 0, 1, 2 and 3, R 11 to R 13 are independently selected from substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, The substituted C5-C 60 Carbocyclic group, the substituted C1-C 60 Heterocyclic group, the substituted C3-C 10 Cycloalkyl, the substituted C1-C 10 Heterocycloalkyl, the substituted C3-C 10 Cycloalkenyl, the substituted C1-C 10 Heterocycloalkenyl, the substituted C6-C 60 Aryl, the substituted C1-C 60 At least one substituent of the heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, and the substituted monovalent non-aromatic condensed heteropolycyclic group is selected from the group consisting of: Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy; are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 ),-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) selected from at least one of C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy; C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 ),-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) selected from at least one of C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and -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 ) and -P(=O)(Q 31 )(Q 32 ), and Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 are independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C1-C 60 heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, monovalent non-aromatic condensed heteropolycyclic groups, biphenyl groups, and terphenyl groups.

10. The light emitting device according to claim 9, wherein: The compound represented by Formula 1 is represented by Formula 1-1: Formula 1-1 Among them, in formula 1-1, R 11 to R 13 are independently related to R in claim 9 11 to R 13 The same definition, Z 11 to Z 13 are independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, C1-C 20 Alkyl, C1-C 20 Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, pyrenyl, yl, pyrrolyl, thienyl, furyl, thiolyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, benzofuranyl, benzothienyl, benzothiorolyl, dibenzothiorolyl and -Si(Q 31 )(Q 32 )(Q 33 ), Q 31 To Q 33 are independently selected from C1-C 20 Alkyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl, naphthyl and pyridyl, and d4 is an integer from 0 to 4.

11. The light emitting device according to claim 1 , further comprising at least one selected from a hole injection layer and a hole transport layer between the plurality of first electrodes and the first layer. in, At least one selected from the hole injection layer and the hole transport layer includes a p-dopant or includes a single film including a p-dopant. 12 . The light emitting device according to claim 1 , further comprising a buffer layer between the first emission layer and the second electrode and between the second emission layer and the second electrode.

13. The light emitting device according to claim 1, wherein: The first electrode is an anode, and The second electrode is a cathode.

14. The light emitting device according to claim 13, wherein: The anode is a reflective anode or a semi-transmissive anode, and The cathode is a transmissive cathode.

15. The light emitting device according to claim 1, wherein: The light emitting device is a top emitting device.

16. The light emitting device according to claim 1, wherein: A resonance order of one selected from the first color light, the second color light, and the third color light is different from resonance orders of the other two of the first color light, the second color light, and the third color light.

17. The light emitting device according to claim 1, wherein: The resonance order of the first color light is greater than or equal to the resonance order of the second color light and the third color light.

18. The light emitting device according to claim 1, wherein: The first color light is blue light, and the second color light is red light or green light, and A region of the first layer corresponding to the third sub-pixel is configured to emit green light or red light.

19. A flat panel display device, comprising: A thin film transistor comprising a source electrode, a drain electrode and an active layer; as well as The light emitting device according to claim 1, The first electrode of the light emitting device is electrically coupled to at least one of the source electrode and the drain electrode of the thin film transistor.

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