Light emitting device, electronic apparatus including light emitting device, and electronic equipment including light emitting device

Abstract

The invention relates to a light emitting device, an electronic apparatus including the light emitting device, and an electronic equipment including the light emitting device. The light emitting device may include a first electrode, a second electrode opposite the first electrode, and an interlayer disposed between the first electrode and the second electrode, where the interlayer may include a first emission layer and an electron transport region between the first emission layer and the second electrode, the first emission layer may include a 1a emission layer and a 1b emission layer between the 1a emission layer and the electron transport region, and the 1b emission layer may include a low refractive index host having a refractive index of about 1.8 or less.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0145937 filed in the Korean Intellectual Property Office on October 27, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] Embodiments of the present disclosure described herein relate to a light emitting device, an electronic device including the light emitting device, and electronic equipment including the light emitting device. Background Art

[0004] The light emitting device may include a first electrode, a hole transport region, an emission layer, an electron transport region, and a second electrode arranged in sequence. Holes injected from the first electrode may move toward the emission layer through the hole transport region. Electrons injected from the second electrode may move toward the emission layer through the electron transport region. Carriers, such as holes and electrons, recombine in the emission layer to generate excitons. When the excitons transition (e.g., relax) from an excited state to a ground state, light may be generated (e.g., an image may be displayed). Summary of the invention

[0005] Aspects according to one or more embodiments of the present disclosure are directed to a light emitting device having improved light emitting efficiency and driving voltage, an electronic device including the light emitting device, and electronic equipment including the light emitting device.

[0006] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the embodiments presented in the disclosure.

[0007] According to one or more embodiments, a light-emitting device includes a first electrode, a second electrode opposite to the first electrode (for example, opposite to and facing the first electrode), and an interlayer arranged between the first electrode and the second electrode, wherein the interlayer may include a first emission layer and an electron transport region between the first emission layer and the second electrode, the first emission layer may include a 1a emission layer and a 1b emission layer between the 1a emission layer and the electron transport region, and the 1b emission layer may include a low refractive index host having a refractive index of about 1.8 or less.

[0008] According to one or more embodiments, an electronic device includes a light emitting device and a thin film transistor electrically connected to the light emitting device.

[0009] According to one or more embodiments, the electronic equipment includes a light emitting device, wherein the electronic equipment may be (for example, selected from) at least one of a flat panel display, a curved display, a computer monitor, a medical monitor, a television, a billboard, an indoor light, an outdoor light, a signal light, a head-up display, a fully transparent or partially transparent display, a flexible display, a rollable display, a foldable display, a retractable display, a laser printer, a phone, a mobile phone, a tablet personal computer, a tablet phone, a personal digital assistant (PDA), a wearable device, a laptop computer, a digital camera, a video camera, a viewfinder, a microdisplay, a 3D display, a virtual reality or augmented reality display, a vehicle, a video wall comprising multiple displays stitched together, a theater or stadium screen, a light therapy device, and a sign. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent through the following description taken in conjunction with the accompanying drawings, in which:

[0011] Figure 1 is a schematic diagram of a light emitting device according to some embodiments;

[0012] Figure 2 is a schematic diagram of a light emitting device according to some embodiments;

[0013] Figure 3 is a schematic diagram of an electronic device according to some embodiments;

[0014] Figure 4 is a schematic diagram of an electronic device according to some embodiments;

[0015] Figure 5 is a schematic perspective view of an electronic device including a light emitting device according to some embodiments;

[0016] Figure 6 A diagram schematically illustrating an exterior of a vehicle as electronic equipment including a light emitting device according to some embodiments; and

[0017] 7A to 7C Each is a schematic explanation Figure 6 Diagram of the interior of a vehicle. DETAILED DESCRIPTION

[0018] Reference will now be made in more detail to embodiments, examples of which are illustrated in the accompanying drawings, wherein the same reference numerals refer to the same elements throughout, and a repeated description thereof may not be provided. In this regard, the embodiments may have different forms and should not be construed as being limited to the descriptions set forth herein. Accordingly, embodiments are described herein only by reference to the drawings to explain various aspects of the description.

[0019] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Throughout this disclosure, the expressions "at least one of ac", "at least one of a to c", "at least one of a, b, and c", "at least one of a to c", etc. indicate only a, only b, only c, both a and b (e.g., simultaneously), both a and c (e.g., simultaneously), both b and c (e.g., simultaneously), all of a, b, and c, or variations thereof.

[0020] In this specification, “including A or B”, “A and / or B”, etc. means A or B, or A and B.

[0021] As used herein, the terms "substantially," "about," and similar terms are used as terms of approximation and not as terms of degree, and are intended to account for the inherent deviations in measured or calculated values ​​that one of ordinary skill in the art would recognize. "Substantially," as used herein, includes the stated value, and refers to the acceptable range of deviations of the particular value determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "substantially" may mean within one or more standard deviations, or within ±30%, ±20%, ±10%, or ±5% of the stated value.

[0022] Furthermore, any numerical range set forth herein is intended to include all subranges with the same numerical precision contained within the set forth range. For example, the range of "1.0 to 10.0" is intended to include all subranges between (and including) setting forth a minimum value of 1.0 and setting forth a maximum value of 10.0, i.e., having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as, for example, 2.4 to 7.6. Any maximum numerical limit set forth in this specification is intended to include all lower numerical limits contained therein, and any minimum numerical limit set forth in this specification is intended to include all higher numerical limits covered therein. Accordingly, the applicant reserves the right to modify this specification, including the claims, to explicitly set forth any subranges contained within the range explicitly set forth herein.

[0023] Further, when describing embodiments of the present disclosure, the use of “may” refers to “one or more embodiments of the present disclosure.”

[0024] 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.

[0025] In the present disclosure, "not including one or any 'component'", "excluding one or any 'component'" and / or "not containing 'component'" and the like mean that the 'component' is not added, selected or used as a component in the composition / structure, but due to other impurities and / or external factors, the 'component' may still be included in less than an appropriate amount.

[0026] In the present disclosure, when a point, a plurality of points or a point particle is spherical, "diameter" indicates a particle diameter or an average particle diameter, and when a particle is non-spherical, "diameter" indicates a major axis length or an average major axis length. The diameter of a particle can be measured using a scanning electron microscope or a particle size analyzer. As a particle size analyzer, for example, a HORIBA, LA-950 laser particle size analyzer can be used. When the size of a particle is measured using a particle size analyzer, the average particle diameter is referred to as D50. D50 refers to the average diameter of particles whose cumulative volume corresponds to 50% by volume in a particle size distribution (e.g., cumulative distribution), and refers to a value corresponding to a particle diameter of 50% from the smallest particle when the total number of particles in a distribution curve accumulated in the order of the smallest particle size to the largest particle size is 100%.

[0027] According to some embodiments of the present disclosure, a light-emitting device includes: a first electrode; a second electrode opposite to the first electrode (for example, opposite to and facing the first electrode); and an interlayer arranged between the first electrode and the second electrode, wherein the interlayer may include: a first emission layer; and an electron transport region between the first emission layer and the second electrode, the first emission layer may include: a 1a emission layer; and a 1b emission layer between the 1a emission layer and the electron transport region, and the 1b emission layer may include a low refractive index host having a refractive index of about 1.8 or less.

[0028] In some embodiments, the first electrode can be a transmissive electrode, and the second electrode can be a reflective or semi-transmissive electrode.

[0029] The electron transport region may include an electron transport layer and / or an electron injection layer.

[0030] In some embodiments, the interlayer may include a hole transport region between the first electrode and the first emission layer, and the hole transport region may include a hole injection layer, a hole transport layer and / or an electron blocking layer. The interlayer may further include a charge generation layer between the hole transport region and the first emission layer. The charge generation layer may include an n-type or n-type charge generation layer adjacent to the hole transport region and a p-type or p-type charge generation layer adjacent to the first emission layer. The p-type or p-type charge generation layer may be arranged between the n-type or n-type charge generation layer and the first emission layer. The n-type or n-type charge generation layer may directly contact the p-type or p-type charge generation layer.

[0031] In some embodiments, the thickness of the emitting layer 1a can be the same as or different from the thickness of the emitting layer 1b.

[0032] In some embodiments, the refractive index of the low refractive index body may be measured at a wavelength of about 460 nm. For example, the refractive index of the low refractive index body measured at a wavelength of about 460 nm may be about 1.8 or less.

[0033] In some embodiments, the refractive index of the low refractive index body may be about 1.75 or less, about 1.73 or less, about 1.7 or less, about 1.68 or less, about 1.65 or less, about 1.6 or less, about 1.5 or less, about 1.4 or less, about 1.3 or less, about 1.2 or less, about 1.1 or less, or about 1.0 or less, and may be about 0 or greater, about 0.1 or greater, about 0.2 or greater, about 0.3 or greater, about 0.4 or greater, or about 0.5 or greater.

[0034] In some embodiments, a low refractive index host may be included in the 1b emission layer. For example, the low refractive index host may be present in the 1b emission layer. The 1a emission layer may not include (e.g., may exclude) the low refractive index host. For example, the 1a emission layer and the 1b emission layer may be distinguished from each other based on the presence of the low refractive index host.

[0035] In some embodiments, the 1b emission layer may directly contact the 1a emission layer. The first emission layer may have a structure of two or more layers including the 1a emission layer and the 1b emission layer.

[0036] In some embodiments, the 1b emission layer may directly contact the electron transport region. For example, the 1b emission layer may be the layer closest to the electron transport region among the multiple layers of the first emission layer. For example, when the first emission layer has a three-layer structure including the 1a emission layer, the 1b emission layer, and the 1c emission layer, the 1b emission layer may be the layer closest to the electron transport region.

[0037] In some embodiments, the low refractive index host can be an electron transport host.The low refractive index host can include boron atoms.

[0038] In some embodiments, the low refractive index host may be represented by Formula 1:

[0039] Formula 1

[0040]

[0041] Among them, in formula 1,

[0042] L 1 To L 3 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10aSubstituted C 1 -C 60 Heterocyclic group,

[0043] a1 to a3 may each independently be an integer selected from 0 to 3,

[0044] R 1 To R 3 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group, -Si(Q 1 )(Q 2 )(Q 3 )、-N(Q 1 )(Q 2 )、-B(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-S(=O) 2 (Q 1 ) or -P(=O)(Q 1 )(Q 2 ),

[0045] R 10a Can be:

[0046] deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro;

[0047] Each unsubstituted or substituted C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl or C 1 -C60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O) 2 (Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof (e.g., any combination thereof) (e.g., hereinafter a combination thereof may also refer to, for example, any combination thereof);

[0048] Each unsubstituted or substituted C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6-C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O) 2 (Q 21 )、-P(=O)(Q 21 )(Q 22 ) or a combination thereof; or

[0049] -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) or -P(=O)(Q 31 )(Q 32 ),and

[0050] Q 1 To Q 3 , Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 Can be independently:

[0051] hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; or

[0052] Each unsubstituted or substituted C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, cyano, C 1 -C 60 Alkyl, C 1 -C 60 Alkoxy, phenyl, biphenyl or a combination thereof.

[0053] In some embodiments, in Formula 1, L 1 To L 3 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Arylene, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heteroarylene, unsubstituted or substituted with at least one R 10a The substituted divalent non-aromatic fused polycyclic group is either unsubstituted or substituted with at least one R 10a A substituted divalent non-aromatic fused heteropolycyclic group.

[0054] In some embodiments, in Formula 1, L 1 To L 3 may be each independently unsubstituted or substituted with at least one R 10a Substituted phenylene, unsubstituted or replaced by at least one R 10a substituted naphthylene, unsubstituted or replaced by at least one R 10a substituted anthracene, unsubstituted or replaced by at least one R 10a Substituted phenanthracene, unsubstituted or replaced by at least one R 10a Substituted phenalkenyl, unsubstituted or replaced by at least one R 10a substituted pyrene, unsubstituted or replaced by at least one R 10a substituted pyridinyl, unsubstituted or replaced by at least one R 10a substituted pyrimidinyl or unsubstituted or replaced by at least one R 10a Substituted triazinylene.

[0055] In some embodiments, in Formula 1, L 1 To L 3 Can be the same as or different from each other.

[0056] In some embodiments, in Formula 1, a1 to a3 may each independently be an integer selected from 1 to 3.

[0057] In some embodiments, in Formula 1, R 1 To R 3can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Aryl is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heteroaryl.

[0058] In some embodiments, the first emission layer may include: a hole transport host different from the low refractive index host; and an electron transport host different from each of the low refractive index host and the hole transport host.

[0059] In some embodiments, the 1a emission layer may include two or more hosts including a hole transport host and an electron transport host. The 1b emission layer may include three or more hosts including a low refractive index host, a hole transport host, and an electron transport host. The hole transport host included in the 1a emission layer and the hole transport host included in the 1b emission layer may include the same material. The electron transport host included in the 1a emission layer and the electron transport host included in the 1b emission layer may include the same material.

[0060] In some embodiments, the first emission layer may include a hole transport host represented by Formula 301-1 or Formula 301-2:

[0061] Formula 301-1

[0062]

[0063] Formula 301-2

[0064]

[0065] Among them, in Formula 301-1 and Formula 301-2,

[0066] Ring A 301 To Ring A 304 Can be independently C3 -C 60 Carbocyclic or C 1 -C 60 Heterocyclic group,

[0067] X 301 Can be O, S, N[(L 304 ) xb4 -R 304 ]、C(R 304 )(R 305 ) or Si(R 304 )(R 305 ),

[0068] xb22 and xb23 can each independently be 0, 1 or 2,

[0069] L 301 To L 304 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0070] xb1 to xb4 may each independently be an integer selected from 0 to 5,

[0071] R 301 To R 305 and R 311 To R 314 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group, -Si(Q 301)(Q 302 )(Q 303 )、-N(Q 301 )(Q 302 )、-B(Q 301 )(Q 302 )、-C(=O)(Q 301 )、-S(=O) 2 (Q 301 ) or -P(=O)(Q 301 )(Q 302 ),

[0072] R 10a Can be:

[0073] deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro;

[0074] Each unsubstituted or substituted C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl or C 1 -C 60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O) 2 (Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof;

[0075] Each unsubstituted or substituted C 3 -C 60 Carbocyclic group, C 1 -C60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O) 2 (Q 21 )、-P(=O)(Q 21 )(Q 22 ) or a combination thereof; or

[0076] -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) or -P(=O)(Q 31 )(Q 32 ),and

[0077] Q11 To Q 13 , Q 21 To Q 23 , Q 31 To Q 33 and Q 301 To Q 303 Can be independently:

[0078] hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; or

[0079] Each unsubstituted or substituted C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, cyano, C 1 -C 60 Alkyl, C 1 -C 60 Alkoxy, phenyl, biphenyl or a combination thereof.

[0080] In an embodiment, in Formula 301-1 and Formula 301-2, Ring A 301 To Ring A 304 Each of them may independently be phenyl, naphthyl, anthracenyl, phenanthrenyl, phenanthrenyl, pyrenyl, pyridyl, pyrimidinyl or triazine.

[0081] In some embodiments, in Formula 301-1 and Formula 301-2, X 301 Can be N[(L 304 ) xb4 -R 304 ], and R 301 To R 305 and R 311 To R 314 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Aryl is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heteroaryl.

[0082] In some embodiments, the first emission layer may include a hole transport host selected from Compound HH1 to Compound HH17:

[0083]

[0084]

[0085] In some embodiments, the first emission layer may include an electron transport host represented by Formula 310:

[0086] Formula 310

[0087]

[0088] Wherein, in formula 310,

[0089] X 311 To X 313 can be independently N or C[(L 314 ) xb314 -R 314 ],

[0090] L 311 To L 314 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0091] xb311 to xb314 may each independently be an integer selected from 0 to 5,

[0092] R 311 To R 314can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group, -Si(Q 311 )(Q 312 )(Q 313 )、-N(Q 311 )(Q 312 )、-B(Q 311 )(Q 312 )、-C(=O)(Q 311 )、-S(=O) 2 (Q 311 ) or -P(=O)(Q 311 )(Q 312 ),

[0093] R 10a Can be:

[0094] deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro;

[0095] Each unsubstituted or substituted C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl or C 1 -C 60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O) 2 (Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof;

[0096] Each unsubstituted or substituted C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22)、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O) 2 (Q 21 )、-P(=O)(Q 21 )(Q 22 ) or a combination thereof; or

[0097] -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) or -P(=O)(Q 31 )(Q 32 ),and

[0098] Q 11 To Q 13 , Q 21 To Q 23 , Q 31 To Q 33 and Q 311 To Q 313 Can be independently:

[0099] hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; or

[0100] Each unsubstituted or substituted C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, cyano, C 1 -C 60 Alkyl, C 1 -C 60 Alkoxy, phenyl, biphenyl or a combination thereof.

[0101] In some embodiments, in Formula 310, X 311 To X 313 At least one of may be N. 311 To X 313 At least two of X may be N. 311 To X 313 Each can be N.

[0102] In some embodiments, in Formula 310, L 311 To L 314 may be each independently unsubstituted or substituted with at least one R 10a Substituted phenylene, unsubstituted or replaced by at least one R 10a substituted naphthylene, unsubstituted or replaced by at least one R 10a substituted anthracene, unsubstituted or replaced by at least one R 10a Substituted phenanthracene, unsubstituted or replaced by at least one R 10a Substituted phenalkenyl, unsubstituted or replaced by at least one R 10a substituted pyrene, unsubstituted or replaced by at least one R 10a substituted pyridinyl, unsubstituted or replaced by at least one R 10a substituted pyrimidinyl or unsubstituted or replaced by at least one R 10a Substituted triazinylene.

[0103] In some embodiments, in Formula 310, xb311 to xb314 may each independently be an integer selected from 1 to 5.

[0104] In some embodiments, in Formula 310, R 311 To R 314 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Aryl is either unsubstituted or substituted with at least one R 10aSubstituted C 1 -C 60 Heteroaryl.

[0105] In some embodiments, the first emission layer may include an electron transport host selected from Compounds EH1 to EH8:

[0106]

[0107] In some embodiments, the amount of the hole transport host included in the 1a emission layer may be the same as the amount of the electron transport host included in the 1a emission layer.

[0108] In some embodiments, the amount of the low refractive index host included in the 1b emission layer may be greater than the amount of the hole transport host included in the 1b emission layer.

[0109] In some embodiments, the amount of the low refractive index host included in the 1b emission layer may be greater than the amount of the electron transport host included in the 1b emission layer.

[0110] In some embodiments, the amount of the hole transport host included in the 1b emission layer may be the same as the amount of the electron transport host included in the 1b emission layer.

[0111] In some embodiments, the first emission layer may include a first dopant (e.g., a phosphorescent dopant) different from each of the low refractive index host, the hole transport host, and the electron transport host. The first emission layer may be an emission layer configured to emit light having a maximum emission wavelength of about 490 nm to about 580 nm. For example, the first emission layer may be an emission layer capable of emitting green light. The first dopant may include a transition metal.

[0112] For example, the 1a emission layer may include a hole transport host, an electron transport host, and a first dopant, and the 1b emission layer may include a low refractive index host, a hole transport host, an electron transport host, and a first dopant.

[0113] In some embodiments, the first emission layer may include a first dopant represented by Formula 401:

[0114] Formula 401

[0115] M(L 401 ) xc1 (L 402 ) xc2

[0116] Formula 402

[0117]

[0118] Among them, in equation 401 and equation 402,

[0119] M may be iridium (Ir), platinum (Pt), palladium (Pd), osmium (Os), titanium (Ti), gold (Au), hafnium (Hf), europium (Eu), terbium (Tb), rhodium (Rh), rhenium (Re) or thulium (Tm),

[0120] L 401 may be a ligand represented by formula 402,

[0121] xc1 can be 1, 2 or 3. When xc1 is 2 or greater, two or more L 401 may be the same as or different from each other,

[0122] L 402 It can be an organic ligand,

[0123] xc2 can be 0, 1, 2, 3 or 4. When xc2 is 2 or greater, two or more L 402 may be the same or different from each other,

[0124] X 401 and X 402 may each independently be nitrogen or carbon,

[0125] Ring A 401 and Ring A 402 Can be independently C 3 -C 60 Carbocyclic or C 1 -C 60 Heterocyclic group,

[0126] T 401 It can 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=*',

[0127] X 403 and X 404 can be independently a single bond, O, S, N (Q 413 )、B(Q 413 )、P(Q 413 )、C(Q 413 )(Q 414 ) or Si(Q 413 )(Q 414 ),

[0128] R 401 and R 402can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 20 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 20 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic 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 ) or -P(=O)(Q 401 )(Q 402 ),

[0129] xc11 and xc12 may each independently be an integer selected from 0 to 10,

[0130] R 10a Can be:

[0131] deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro;

[0132] Each unsubstituted or substituted C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl or C 1 -C 60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C2 -C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O) 2 (Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof;

[0133] Each unsubstituted or substituted C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2 (Q 21 )、-P(=O)(Q 21 )(Q 22 ) or a combination thereof; or

[0134] -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) or -P(=O)(Q 31 )(Q 32 ),

[0135] Q 11 To Q 13 , Q 21 To Q 23 , Q 31 To Q 33 , Q 401 To Q 403 and Q 411 To Q 414 Can be independently:

[0136] hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; or

[0137] Each unsubstituted or substituted C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, cyano, C 1 -C 60 Alkyl, C 1 -C 60 alkoxy, phenyl, biphenyl or a combination thereof, and

[0138] * and *' in Formula 402 may each indicate a binding site with M in Formula 401.

[0139] In some embodiments, the first emission layer may include a first dopant selected from Compound PD1 to Compound PD25:

[0140]

[0141] In some embodiments, the interlayer may further include a second emission layer between the first electrode and the 1a emission layer. For example, when the light-emitting device is a tandem light-emitting device including two or more emission layers, the first emission layer may be the emission layer closest to the second electrode or the electron transport region. The second emission layer may have a single layer or a multilayer structure.

[0142] In some embodiments, the interlayer may further include:

[0143] a third emission layer between the second emission layer and the 1a emission layer; and

[0144] The fourth emission layer is between the third emission layer and the 1a emission layer.

[0145] In some embodiments, the light emitting device may satisfy at least one of conditions 1 to 3 (eg, selected from):

[0146] Condition 1

[0147] The second emission layer includes a 2-1 emission layer and a 2-2 emission layer between the 2-1 emission layer and the third emission layer;

[0148] Condition 2

[0149] The third emission layer includes a 3-1 emission layer and a 3-2 emission layer between the 3-1 emission layer and the fourth emission layer; and

[0150] Condition 3

[0151] The fourth emission layer includes the 4-1 emission layer and the 4-2 emission layer between the 4-1 emission layer and the 1a emission layer.

[0152] For example, the light emitting device may satisfy one of conditions 1 to 3, two of conditions 1 to 3, or all of conditions 1 to 3.

[0153] In some embodiments, the low refractive index body may not be included in each of the 2-2 emission layer, the 3-2 emission layer, and the 4-2 emission layer. For example, when the light-emitting device satisfies condition 1, the low refractive index body may not be included in the 2-2 emission layer, when the light-emitting device satisfies condition 2, the low refractive index body may not be included in the 3-2 emission layer, and when the light-emitting device satisfies condition 3, the low refractive index body may not be included in the 4-2 emission layer.

[0154] In some embodiments, the low refractive index body may not be included in each of the second emission layer, the third emission layer, and the fourth emission layer. For example, when the light-emitting device satisfies condition 1, the low refractive index body may not be included in both the 2-2 emission layer and the 2-1 emission layer (e.g., not in both at the same time), when the light-emitting device satisfies condition 2, the low refractive index body may not be included in both the 3-2 emission layer and the 3-1 emission layer (e.g., not in both at the same time), and when the light-emitting device satisfies condition 3, the low refractive index body may not be included in both the 4-2 emission layer and the 4-1 emission layer (e.g., not in both at the same time).

[0155] In some embodiments, the second emission layer, the third emission layer, and the fourth emission layer may include the same host and the same dopant, respectively. The host included in each of the second emission layer, the third emission layer, and the fourth emission layer may be different from the low refractive index host, the electron transport host, and the hole transport host included in the first emission layer. The dopant included in each of the second emission layer, the third emission layer, and the fourth emission layer may be different from the dopant included in the first emission layer.

[0156] In some embodiments, the first emission layer may include a first dopant (e.g., a phosphorescent dopant), each of the second emission layer, the third emission layer, and the fourth emission layer may include a second dopant (e.g., a fluorescent dopant), and the first dopant and the second dopant may be different from each other. The emission layer 1a and the emission layer 1b may include the same first dopant.

[0157] In some embodiments, the second to fourth emission layers may each be an emission layer configured to emit light having a maximum emission wavelength of about 450 nm to about 490 nm. For example, the second to fourth emission layers may each be an emission layer capable of emitting blue light. The second dopant may not include (e.g., may exclude) a transition metal.

[0158] In some embodiments, the second emission layer may include a second dopant represented by Formula 501:

[0159] Formula 501

[0160]

[0161] Wherein, in Formula 501,

[0162] Ar 501 may be unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0163] L 501 To L 503 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0164] xd1 to xd3 may each independently be an integer selected from 0 to 3,

[0165] xd4 may be an integer selected from 1 to 6,

[0166] R 501 and R 502 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group, -Si(Q 501 )(Q 502 )(Q 503 )、-N(Q 501 )(Q 502 )、-B(Q 501 )(Q 502 )、-C(=O)(Q 501 )、-S(=O) 2 (Q 501 ) or -P(=O)(Q 501 )(Q 502 ),

[0167] R 10a Can be:

[0168] deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro;

[0169] Each unsubstituted or substituted C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl or C 1 -C 60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O) 2 (Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof;

[0170] Each unsubstituted or substituted C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O) 2 (Q 21 )、-P(=O)(Q 21 )(Q 22 ) or a combination thereof; or

[0171] -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) or -P(=O)(Q 31 )(Q 32 ),and

[0172] Q 11 To Q 13 , Q 21 To Q 23 , Q 31 To Q 33 and Q 501 To Q 503 Can be independently:

[0173] hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; or

[0174] Each unsubstituted or substituted C 1 -C 60 Alkyl, C2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, cyano, C 1 -C 60 Alkyl, C 1 -C 60 Alkoxy, phenyl, biphenyl or a combination thereof.

[0175] In some embodiments, in Formula 501, Ar 501 may be each independently unsubstituted or substituted with at least one R 10a Substituted phenyl, unsubstituted or replaced by at least one R 10a substituted naphthyl, unsubstituted or replaced by at least one R 10a substituted anthracenyl, unsubstituted or replaced by at least one R 10a substituted phenanthrenyl, unsubstituted or replaced by at least one R 10a substituted phenalkenyl, unsubstituted or replaced by at least one R 10a substituted pyrenyl, unsubstituted or replaced by at least one R 10a substituted pyridyl, unsubstituted or replaced by at least one R 10a substituted pyrimidinyl or unsubstituted or with at least one R 10a Substituted triazine groups.

[0176] In some embodiments, in Formula 501, R 501 and R 502 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Aryl is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heteroaryl.

[0177] In some embodiments, the second emission layer may include a second dopant selected from Compound FD1 to Compound FD38:

[0178]

[0179]

[0180]

[0181]

[0182] According to some embodiments of the present disclosure, an electronic device includes: a light emitting device; and a thin film transistor electrically connected to the light emitting device.

[0183] In some embodiments, the electronic device can further include a color filter, a color conversion layer, or a combination thereof.

[0184] In some embodiments, at least one of the color filter and the color conversion layer may include quantum dots. For example, the color filter may include quantum dots, the color conversion layer may include quantum dots, or the color filter and the color conversion layer may each include quantum dots.

[0185] According to one or more embodiments, the electronic equipment includes an electronic device, wherein the electronic equipment may be (for example, selected from) at least one of a flat panel display, a curved display, a computer monitor, a medical monitor, a television, a billboard, an indoor light, an outdoor light, a signal light, a head-up display, a fully transparent or partially transparent display, a flexible display, a rollable display, a foldable display, a retractable display, a laser printer, a phone, a mobile phone, a tablet personal computer, a tablet phone, a personal digital assistant (PDA), a wearable device, a laptop computer, a digital camera, a video camera, a viewfinder, a microdisplay, a 3D display, a virtual reality or augmented reality display, a vehicle, a video wall comprising multiple displays stitched together, a theater or stadium screen, a light therapy device, and a sign.

[0186] By including a low refractive index host in the 1b emission layer, the light-emitting device can have improved luminous efficiency and driving voltage. More specifically, when the low refractive index host is included in a second emission layer that is closer to the hole transport zone than the first emission layer, the luminous efficiency can be reduced and the driving voltage can be increased. In some embodiments, when a low refractive index host is included in the electron transport zone, the increase in luminous efficiency can be reduced and the driving voltage can be increased. Accordingly, when a low refractive index host is included in an emission layer adjacent to the electron transport zone, the luminous efficiency and / or driving voltage can be significantly improved. For example, the technical idea of ​​the present disclosure is to determine the position of the low refractive index host to improve the luminous efficiency and / or driving voltage of the light-emitting device.

[0187] Figure 1 Description

[0188] Figure 1 1 is a schematic cross-sectional view of a light emitting device 10 according to some embodiments. The light emitting device 10 may include a first electrode 110, an interlayer 130, and a second electrode 150. The interlayer 130 may include a hole transport region 121, an emission layer 131, and an electron transport region 144. The emission layer 131 may include a 1a emission layer 131a and a 1b emission layer 131b.

[0189] Below, we will refer to Figure 1 A structure of a light emitting device 10 and a method of manufacturing the light emitting device 10 according to an embodiment are described.

[0190] First electrode 110

[0191] exist Figure 1 In the embodiment of the present invention, the substrate may be additionally located under the first electrode 110 or on the second electrode 150. As the substrate, a glass substrate or a plastic substrate may be used. The substrate may be a flexible substrate. For example, the substrate may include plastics having excellent or appropriate heat resistance and durability, such as polyimide, polyethylene terephthalate (PET), polycarbonate, polyethylene naphthalate, polyarylate (PAR), polyetherimide, or any combination thereof.

[0192] The first electrode 110 may be formed by providing a material for forming the first electrode 110 on a substrate using a deposition method or a sputtering method. When the first electrode 110 is an anode, the material for forming the first electrode 110 may be a high work function material that facilitates injection of holes.

[0193] The first electrode 110 may 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 may include indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO 2), zinc oxide (ZnO), or a combination thereof. In one or more embodiments, when the first electrode 110 is a semi-transmissive electrode or a reflective electrode, the material used to form the first electrode 110 may include magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), or a combination thereof.

[0194] The first electrode 110 may have a single-layer structure consisting of a single layer or a multi-layer structure including a plurality of layers. For example, the first electrode 110 may have a triple-layer structure of ITO / Ag / ITO.

[0195] Mezzanine 130

[0196] The interlayer 130 may be disposed on the first electrode 110. The interlayer 130 may include a hole transport region 121, an emission layer 131, and an electron transport region 144.

[0197] In addition to one or more suitable organic materials, the interlayer 130 may further include metal-containing compounds (such as organometallic compounds) and / or inorganic materials (such as quantum dots), etc.

[0198] The interlayer 130 may include i) two or more emission units sequentially stacked between the first electrode 110 and the second electrode 150, and ii) a charge generation layer located between the two or more emission units. When the interlayer 130 includes the emission units and the charge generation layer as described above, the light emitting device 10 may be a tandem light emitting device. The charge generation layer may include an n-type or n-type charge generation layer and a p-type or p-type charge generation layer.

[0199] Hole transport region 121

[0200] The hole transport region 121 may have i) a single layer structure consisting of a single layer including a single material, ii) a single layer structure consisting of a single layer including multiple materials different from each other, or iii) a multilayer structure consisting of multiple layers including multiple different materials different from each other.

[0201] The hole transport region 121 may include a hole injection layer, a hole transport layer, an emission assisting layer, an electron blocking layer, or a combination thereof.

[0202] In some embodiments, the hole transport region 121 may have a multilayer structure including a hole injection layer / hole transport layer structure, a hole injection layer / hole transport layer / emission auxiliary layer structure, a hole injection layer / emission auxiliary layer structure, a hole transport layer / emission auxiliary layer structure, or a hole injection layer / hole transport layer / emission auxiliary layer structure, wherein in each structure, the layers are stacked sequentially from the first electrode 110.

[0203] The hole transport region 121 may include a compound represented by Formula 201, a compound represented by Formula 202, or a combination thereof:

[0204] Formula 201

[0205]

[0206] Formula 202

[0207]

[0208] Among them, in equation 201 and equation 202,

[0209] L 201 To L 204 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0210] L 205 Can be *-O-*', *-S-*', *-N(Q 201 )-*', unsubstituted or replaced by at least one R 10a Substituted C 1 -C 20 Alkylene, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 20 Alkenylene, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0211] xa1 to xa4 may each independently be an integer selected from 0 to 5,

[0212] xa5 may be an integer selected from 1 to 10,

[0213] R 201 To R 204 and Q 201 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C60 Heterocyclic group,

[0214] R 201 and R 202 may be optionally substituted by a single bond, unsubstituted or by at least one R 10a Substituted C 1 -C 5 Alkylene is either unsubstituted or substituted with at least one R 10a Substituted C 2 -C 5 The alkenylene groups are connected to each other to form an unsubstituted or substituted R 10a Substituted C 8 -C 60 Polycyclic groups (e.g., carbazole groups, etc.) (e.g., compound HT16),

[0215] R 203 and R 204 may be optionally substituted by a single bond, unsubstituted or by at least one R 10a Substituted C 1 -C 5 Alkylene is either unsubstituted or substituted with at least one R 10a Substituted C 2 -C 5 The alkenylene groups are connected to each other to form an unsubstituted or substituted R 10a Substituted C 8 -C 60 polycyclic groups, and

[0216] na1 may be an integer selected from 1 to 4.

[0217] For example, each of Formula 201 and Formula 202 may include (eg, selected from) at least one of the groups represented by Formula CY201 to Formula CY217:

[0218]

[0219] In formula CY201 to formula CY217, R 10b and R 10c Can be respectively with respect to R 10a Same as described, CY 201 To Ring CY 204 Can be independently C 3 -C 20 Carbocyclic or C 1 -C 20 heterocyclic group, and at least one hydrogen in Formula CY201 to Formula CY217 may be unsubstituted or replaced by R as described above. 10a replace.

[0220] In some embodiments, ring CY in Formula CY201 to Formula CY217 201 To Ring CY 204 Each independently may be phenyl, naphthyl, phenanthryl or anthracenyl.

[0221] In one or more embodiments, each of Formula 201 and Formula 202 may include (eg, selected from) at least one of the groups represented by Formula CY201 to Formula CY203.

[0222] In one or more embodiments, Formula 201 may include (eg, selected from) at least one of the groups represented by Formulas CY201 to CY203 and (eg, selected from) at least one of the groups represented by Formulas CY204 to CY217.

[0223] In one or more embodiments, in Formula 201, xa1 may be 1, R 201 may be (for example, selected from) a group represented by one of Formula CY201 to Formula CY203, xa2 may be 0, and R 202 It may be (for example, selected from) a group represented by one of Formula CY204 to Formula CY207.

[0224] In one or more embodiments, each of Formula 201 and Formula 202 may not include (eg, may exclude) (eg, be selected from) a group represented by one of Formula CY201 to Formula CY203.

[0225] In one or more embodiments, Formula 201 and Formula 202 may each not include the groups represented by Formula CY201 to Formula CY203, and may include (eg, selected from) at least one of the groups represented by Formula CY204 to Formula CY217.

[0226] In one or more embodiments, each of Formula 201 and Formula 202 may not include (eg, may exclude) (eg, be selected from) a group represented by one of Formula CY201 to Formula CY217.

[0227] In some embodiments, the hole transport region 121 may include (for example, selected from) one of compounds HT1 to HT46, 4,4',4"-[tris(3-methylphenyl)phenylamino]triphenylamine (m-MTDATA), 4,4',4"-tris(N,N-diphenylamino)triphenylamine (TDATA), 4,4',4"-tris[N-(2-naphthyl)-N-phenylamino]triphenylamine (2-TNATA), N,N'-di(naphthalene-1-yl)-N,N'-diphenyl-benzidine (NPB (NPD)), β-NPB, N,N'-bis(3-tolyl)-N,N'-diphenyl-[1,1'-biphenyl]-4,4'- diamine (TPD), spiro TPD, spiro NPB, methylated NPB, 4,4'-cyclohexylenebis[N,N-bis(4-methylphenyl)aniline] (TAPC), 4,4'-bis[N,N'-(3-methylphenyl)amino]-3,3'-dimethylbiphenyl (HMTPD), 4,4',4"-tri(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / camphorsulfonic acid (PANI / CSA), polyaniline / poly(4-styrenesulfonate) (PANI / PSS), or a combination thereof:

[0228]

[0229]

[0230]

[0231]

[0232]

[0233] The thickness of the hole transport region 121 may be about to about In the range of, for example, about to about When the hole transport region 121 includes a hole injection layer, a hole transport layer, and a combination thereof, the thickness of the hole injection layer may be about 1000 Å. to about In the range of, for example, about to about The thickness of the hole transport layer can be about to about In the range of, for example, about to about When the thicknesses of the hole transport region 121, the hole injection layer, and the hole transport layer are within these ranges, satisfactory hole transport characteristics may be obtained without significantly increasing the driving voltage.

[0234] The emission auxiliary layer is a layer that increases light emission efficiency by compensating for an optical resonance distance according to a wavelength of light emitted from the emission layer 131. The electron blocking layer may be a layer that prevents electrons from leaking from the emission layer 131 to the hole transport region 121. Materials that may be included in the hole transport region 121 may be included in the emission auxiliary layer and the electron blocking layer.

[0235] p-dopant

[0236] In addition to the aforementioned materials, the hole transport region 121 may further include a charge generation material for improvement of conductive properties. The charge generation material may be substantially uniformly or non-uniformly dispersed in the hole transport region 121 (eg, as a single layer composed of the charge generation material).

[0237] The charge generating material may be, for example, a p-dopant.

[0238] For example, the p-dopant may have a lowest unoccupied molecular orbital (LUMO) energy level of about -3.5 eV or less.

[0239] In one or more embodiments, the p-dopant may include a quinone derivative, a cyano group-containing compound, a compound including the element EL1 and the element EL2, or a combination thereof.

[0240] Examples of the quinone derivative are tetracyanoquinodimethane (TCNQ), 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ), and the like.

[0241] Examples of cyano group-containing compounds are dipyrazino[2,3-f:2',3'-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (HAT-CN) and compounds represented by Formula 221:

[0242]

[0243] Formula 221

[0244]

[0245] Among them, in formula 221,

[0246] R 221 To R 223 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10aSubstituted C 1 -C 60 a heterocyclic group, and

[0247] R 221 To R 223 At least one of them may be independently C each substituted by 3 -C 60 Carbocyclic or C 1 -C 60 Heterocyclic group: cyano; -F; -Cl; -Br; -I; C substituted by cyano, -F, -Cl, -Br, -I or any combination thereof 1 -C 20 an alkyl group; or a combination thereof.

[0248] In a compound including an element EL1 and an element EL2, the element EL1 may be a metal, a metalloid, or a combination thereof, and the element EL2 may be a nonmetal, a metalloid, or a combination thereof.

[0249] Examples of metals are alkali metals (e.g., lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), etc.); alkaline earth metals (e.g., beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), etc.); transition metals (e.g., titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), technetium (Tc), rhenium (Re), iron (Fe), ruthenium (Ru), osmium (Os), cobalt (Cs), etc.). o), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au), etc.); late transition metals (e.g., zinc (Zn), indium (In), tin (Sn), etc.); and lanthanide metals (e.g., lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), etc.).

[0250] Examples of metalloids are silicon (Si), antimony (Sb), and tellurium (Te).

[0251] Examples of nonmetals are oxygen (O) and halogens (eg, F, Cl, Br, I, etc.).

[0252] Examples of compounds including element EL1 and element EL2 are metal oxides, metal halides (e.g., metal fluorides, metal chlorides, metal bromides, or metal iodides), metalloid halides (e.g., metalloid fluorides, metalloid chlorides, metalloid bromides, or metalloid iodides), metal tellurides, or combinations thereof.

[0253] Examples of metal oxides are tungsten oxides (e.g., WO, W 2 O 3 , WO 2 , WO 3 , W 2 O 5 etc.), vanadium oxides (e.g., VO, V 2 O 3 , VO 2 、V 2 O 5 etc.), molybdenum oxides (e.g., MoO, Mo 2 O 3 、MoO 2 、MoO 3 、Mo 2 O 5 etc.) and / or rhenium oxide (e.g., ReO 3 etc.

[0254] Examples of the metal halide are alkali metal halides, alkaline earth metal halides, transition metal halides, post-transition metal halides, and lanthanide metal halides.

[0255] Examples of alkali metal halides are LiF, NaF, KF, RbF, CsF, LiCl, NCl, KCl, RbCl, CsCl, LiBr, NaBr, KBr, RbBr, CsBr, LiI, NaI, KI, RbI and / or CsI, etc.

[0256] An example of an alkaline earth metal halide is BeF 2 MgF 2 , CaF 2 , SrF 2 , BaF 2 、BeCl 2 MgCl 2 , CCl 2 、SrCl 2 , BCl 2 ,BeBr 2 MgBr 2 , CaBr 2 , SrBr 2 ,BaBr 2 ,BeI 2 MgI 2 ,CaI 2 , SrI 2 and BaI 2 .

[0257] Examples of transition metal halides are titanium halides (e.g., TiF 4 、TiCl4 、TiBr 4 、TiI 4 etc.), zirconium halides (e.g., ZrF 4 、ZrCl 4 , ZrBr 4 , ZrI 4 etc.), hafnium halides (e.g., HfF 4 , HfCl 4 , HfBr 4 , HfI 4 etc.), vanadium halides (e.g., VF 3 、VCl 3 , VBr 3 VI 3 etc.), niobium halides (e.g., NbF 3 、NbCl 3 , NbBr 3 , NbI 3 etc.), tantalum halides (e.g., TaF 3 、TaCl 3 、TaBr 3 、TaI 3 etc.), chromium halides (e.g., CrF 3 CrCl 3 CrBr 3 CrI 3 etc.), molybdenum halides (e.g., MoF 3 、MoCl 3 、MoBr 3 、MoI 3 etc.), tungsten halides (e.g., WF 3 、WCl 3 , WBr 3 , WI 3 etc.), manganese halides (e.g., MnF 2 、MnCl 2 、MnBr 2 、MnI 2 etc.), technetium halides (e.g., TcF 2 , TcCl 2 , TcBr 2 , TcI 2 etc.), rhenium halides (e.g., ReF 2 、ReCl 2 、ReBr 2 、ReI 2 etc.), iron (II) halides (or ferrous halides) (e.g., FeF 2 、FeCl 2 , FeBr 2 ,FeI2 etc.), ruthenium halides (e.g., RuF 2 、RuCl 2 ,RuBr 2 , RuI 2 etc.), osmium halides (e.g., OsF 2 , OsCl 2 、OsBr 2 , OsI 2 etc.), cobalt halides (e.g., CoF 2 、CoCl 2 ,CoBr 2 、CoI 2 etc.), rhodium halides (e.g., RhF 2 , RhCl 2 , RhBr 2 , RhI 2 etc.), iridium halides (e.g., IrF 2 、IrCl 2 ,IrBr 2 ,IrI 2 etc.), nickel halides (e.g., NiF 2 、NiCl 2 、NiBr 2 , NiI 2 etc.), palladium halides (e.g., PdF 2 , PdCl 2 , PdBr 2 , PdI 2 etc.), platinum halides (e.g., PtF 2 , PtCl 2 , PtBr 2 , PtI 2 etc.), copper (I) halides (or cuprous halides) (e.g., CuF, CuCl, CuBr, CuI, etc.), silver halides (e.g., AgF, AgCl, AgBr, AgI, etc.), and gold halides (e.g., AuF, AuCl, AuBr, AuI, etc.).

[0258] Examples of late transition metal halides are zinc halides (e.g., ZnF 2 、ZnCl 2 、ZnBr 2 、ZnI 2 etc.), indium halides (e.g., InI 3 etc.) and / or tin halides (e.g., SnI 2 etc.

[0259] Examples of lanthanide metal halides are YbF, YbF 2 , YbF 3、SmF 3 , YbCl, YbCl 2 YbCl 3 、SmCl 3 , YbBr, YbBr 2 , YbBr 3 、SmBr 3 、YbI、YbI 2 ,YbI 3 and / or SmI 3 wait.

[0260] Examples of metalloid halides are antimony halides (e.g., SbCl 5 etc.

[0261] Examples of metal tellurides are alkali metal tellurides (e.g., Li 2 Te、Na 2 Te, K 2 Te、Rb 2 Te and / or Cs 2 Te, etc.), alkaline earth metal tellurides (e.g., BeTe, MgTe, CaTe, SrTe and / or BaTe, etc.), transition metal tellurides (e.g., TiTe 2 、ZrTe 2 、HfTe 2 、V 2 Te 3 , Nb 2 Te 3 、 2 Te 3 Cr 2 Te 3 、Mo 2 Te 3 , W 2 Te 3 , MnTe, TcTe, ReTe, FeTe, RuTe, OsTe, CoTe, RhTe, IrTe, NiTe, PdTe, PtTe, Cu 2 Te, CuTe, Ag 2 Te, AgTe and / or Au 2 Te, etc.), late transition metal tellurides (e.g., ZnTe, etc.) and / or lanthanide metal tellurides (e.g., LaTe, CeTe, PrTe, NdTe, PmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe and / or LuTe, etc.), etc.

[0262] Emission layer 131

[0263] When the light emitting device 10 is a full-color light emitting device, the emission layer 131 may be patterned into a red emission layer, a green emission layer and / or a blue emission layer according to sub-pixels. In one or more embodiments, the emission layer 131 may have a stacked structure of two or more layers of a red emission layer, a green emission layer, and a blue emission layer, wherein the two or more layers are in contact with each other or separated from each other to emit white light. In one or more embodiments, the emission layer 131 may include two or more materials of a red light emitting material, a green light emitting material, and a blue light emitting material, wherein the two or more materials are mixed with each other in a single layer to emit white light.

[0264] The emission layer 131 may include a host and a dopant. The dopant may include a phosphorescent dopant, a fluorescent dopant, or a combination thereof.

[0265] The amount of the dopant in the emission layer 131 may be about 0.01 parts by weight to about 15 parts by weight based on about 100 parts by weight of the host.

[0266] In one or more embodiments, the emission layer 131 may include quantum dots.

[0267] The emission layer 131 may include a delayed fluorescent material. The delayed fluorescent material may act as a host or a dopant in the emission layer 131.

[0268] The thickness of the emission layer 131 may be about to about For example, about to about When the thickness of the emission layer 131 is within this range, excellent or appropriate light emitting characteristics may be obtained without significantly increasing the driving voltage.

[0269] main body

[0270] In one or more embodiments, the host may include a compound represented by Formula 301:

[0271] Formula 301

[0272] [Ar 301 ] xb11 -[(L 301 ) xb1 -R 301 ] xb21 .

[0273] Wherein, in Formula 301,

[0274] Ar 301 and L 301 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0275] xb11 can be 1, 2 or 3,

[0276] xb1 may be an integer selected from 0 to 5,

[0277] R 301 It may be hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C 2 -C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group, -Si(Q 301 )(Q 302 )(Q 303 )、-N(Q 301 )(Q 302 )、-B(Q 301 )(Q 302 )、-C(=O)(Q 301 )、-S(=O) 2 (Q 301 ) or -P(=O)(Q 301 )(Q 302 ),

[0278] xb21 may be an integer selected from 1 to 5, and

[0279] Q 301 To Q 303 Each of them is different from the one in this paper 1 Same as described.

[0280] For example, when xb11 in Formula 301 is 2 or greater, two or more Ar 301 Can be connected to each other via a single bond.

[0281] In one or more embodiments, the host may include a compound represented by Formula 301-1, a compound represented by Formula 301-2, or a combination thereof:

[0282] Formula 301-1

[0283]

[0284] Formula 301-2

[0285]

[0286] Among them, in Formula 301-1 and Formula 301-2,

[0287] Ring A 301 To Ring A 304 Can be independently C 3 -C 60 Carbocyclic or C 1 -C 60 Heterocyclic group,

[0288] X 301 Can be O, S, N[(L 304 ) xb4 -R 304 ]、C(R 304 )(R 305 ) or Si(R 304 )(R 305 ),

[0289] xb22 and xb23 can each independently be 0, 1 or 2,

[0290] L 301 , xb1 and R 301 may each be the same as described herein,

[0291] L 302 To L 304 can be independently compared with the L 301 Same as described,

[0292] xb2 to xb4 may each independently be the same as described herein for xb1, and

[0293] R 302 To R 305 and R 311 To R 314 can be respectively compared with the R 301 Same as described.

[0294] In one or more embodiments, the host may include an alkaline earth metal complex, a late transition metal complex, or a combination thereof. For example, the host may include a Be complex (eg, compound H55), a Mg complex, a Zn complex, or a combination thereof.

[0295] In one or more embodiments, the host may include: (e.g., selected from) one of Compounds H1 to H128; 9,10-di(2-naphthyl)anthracene (ADN); 2-methyl-9,10-bis(naphthalene-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(carbazol-9-yl)benzene (mCP); 1,3,5-tri(carbazol-9-yl)benzene (TCP); or a combination thereof:

[0296]

[0297]

[0298]

[0299]

[0300]

[0301]

[0302]

[0303] Phosphorescent dopants

[0304] In one or more embodiments, the phosphorescent dopant may include at least one transition metal as a central metal.

[0305] The phosphorescent dopant may include a monodentate ligand, a bidentate ligand, a tridentate ligand, a tetradentate ligand, a pentadentate ligand, a hexadentate ligand, or a combination thereof.

[0306] The phosphorescent dopant may be electrically neutral.

[0307] For example, the phosphorescent dopant may include an organometallic compound represented by Formula 401:

[0308] Formula 401

[0309] M(L 401 ) xc1 (L 402 ) xc2

[0310] Formula 402

[0311]

[0312] Among them, in equation 401 and equation 402,

[0313] M may be a transition metal (e.g., iridium (Ir), platinum (Pt), palladium (Pd), osmium (Os), titanium (Ti), gold (Au), hafnium (Hf), europium (Eu), terbium (Tb), rhodium (Rh), rhenium (Re), or thulium (Tm)),

[0314] L 401 may be a ligand represented by Formula 402, and xc1 may be 1, 2 or 3, wherein when xc1 is 2 or greater, two or more L 401 may be the same as or different from each other,

[0315] L 402 may be an organic ligand, and xc2 may be 0, 1, 2, 3 or 4, and when xc2 is 2 or greater, two or more L 402 may be the same as or different from each other,

[0316] X 401 and X 402 may each independently be nitrogen or carbon,

[0317] Ring A 401 and Ring A 402 Can be independently C 3 -C 60 Carbocyclic or C 1 -C 60 Heterocyclic group,

[0318] T 401 It can be a single bond, *-O-*', *-S-*', *-C(=O)-*', *-N(Q 411 )-*'、*-C(Q 411 )(Q 412 )-*',

[0319] *-C(Q 411 )=C(Q 412 )-*'、*-C(Q 411 )=*'or*=C=*',

[0320] X 403 and X 404 can be independently a chemical bond (e.g., a covalent bond or a coordination bond), O, S, N (Q 413 )、B(Q 413 )、P(Q 413 )、C(Q 413 )(Q 414 ) or Si(Q 413 )(Q 414 ),

[0321] Q 411 To Q 414 can be respectively compared with the Q 1 Same as described,

[0322] R 401 and R 402 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 20 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 20 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic 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 ) or -P(=O)(Q 401 )(Q 402 ),

[0323] Q 401 To Q 403 can be respectively compared with the Q 1 Same as described,

[0324] xc11 and xc12 may each independently be an integer selected from 0 to 10, and

[0325] * and *' in Formula 402 each indicate a binding site with M in Formula 401.

[0326] For example, in equation 402, i)X 401 may be nitrogen, and X 402 Can be carbon, or ii) X 401 and X 402 Each of may be nitrogen.

[0327] In some embodiments, when xc1 in Formula 401 is 2 or greater, two or more L401 The two rings A 401 Optionally, T as a linker 402 bonded to each other, and two or more L 401 The two rings A 402 Optionally, T as a linker 403 Bonded to each other (see Compound PD1 to Compound PD4 and Compound PD7). 402 and T 403 can be respectively compared with the T 401 Same as described.

[0328] L in Formula 401 402 It can be an organic ligand. For example, L 402 It may include a halogen group, a diketone group (e.g., an acetylacetonate group), a carboxylic acid group (e.g., a picolinate group), a -C(=O) group, an isonitrile group, a -CN group, a phosphorus-containing group (e.g., a phosphine group, a phosphite group, etc.), or a combination thereof.

[0329] The phosphorescent dopant may include (eg, be selected from), for example, one or a combination of Compound PD1 to Compound PD39:

[0330]

[0331]

[0332]

[0333] Fluorescent dopants

[0334] The fluorescent dopant may include an amine-containing compound, a styrene-containing compound, or a combination thereof.

[0335] For example, the fluorescent dopant may include a compound represented by Formula 501:

[0336] Formula 501

[0337]

[0338] Wherein, in Formula 501,

[0339] Ar 501 , L 501 To L 503 , R 501 and R 502 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C60 Heterocyclic group,

[0340] xd1 to xd3 may each independently be 0, 1, 2 or 3, and

[0341] xd4 can be 1, 2, 3, 4, 5 or 6.

[0342] For example, Ar in Formula 501 501 It may be a condensed ring group in which three or more monocyclic groups are condensed together (for example, anthracenyl, 1,2-triphenylenyl, or pyrene).

[0343] In one or more embodiments, xd4 in equation 501 may be 2.

[0344] In some embodiments, the fluorescent dopant may include: (e.g., selected from) one of Compound FD1 to Compound FD38; 4,4'-bis(2,2-diphenylvinyl)-1,1'-biphenyl (DPVBi); 4,4'-bis[4-(N,N-diphenylamino)phenylvinyl]biphenyl (DPAVBi); or a combination thereof:

[0345]

[0346]

[0347]

[0348] Delayed fluorescence material

[0349] The emission layer 131 may include a delayed fluorescent material.

[0350] In the specification, the delayed fluorescent material may be selected from compounds capable of emitting delayed fluorescence based on a delayed fluorescence emission mechanism.

[0351] The delayed fluorescent material included in the emission layer 131 may serve as a host or a dopant depending on the types or kinds of other materials included in the emission layer 131 .

[0352] In some embodiments, the difference between the triplet energy level (eV) of the delayed fluorescent material and the singlet energy level (eV) of the delayed fluorescent material may be 0 eV to 0.5 eV. When the difference between the triplet energy level (eV) of the delayed fluorescent material and the singlet energy level (eV) of the delayed fluorescent material satisfies the above range, up-conversion of the delayed fluorescent material from the triplet state to the singlet state may effectively occur, and therefore, the light emitting device 10 may have improved luminous efficiency.

[0353] For example, the delayed fluorescent material may include: i) at least one electron donor (eg, a π-electron-rich C 3 -C 60a cyclic group, such as a carbazolyl group) and at least one electron acceptor (e.g., a sulfoxide group, a cyano group, or a π-electron-deficient nitrogen-containing C 1 -C 60 cyclic group), and ii) a C 8 -C 60 Polycyclic materials.

[0354] Examples of the delayed fluorescent material may include (eg, selected from) at least one of Compound DF1 to Compound DF14:

[0355]

[0356]

[0357] quantum dots

[0358] The emission layer 131 may include quantum dots.

[0359] In the specification, quantum dots refer to crystals of semiconductor compounds. The quantum dots can be configured to emit light of one or more appropriate emission wavelengths according to the size of the crystal. The quantum dots can be configured to emit light of one or more appropriate emission wavelengths by adjusting the ratio of elements constituting the quantum dots.

[0360] The size (eg, average diameter or major axis) of a quantum dot can be in the range of, for example, about 1 nm to about 10 nm.

[0361] The quantum dots may be synthesized by a wet chemical process, a metal organic chemical vapor deposition (MOCVD) process, a molecular beam epitaxy (MBE) process, or any process similar thereto.

[0362] The wet chemical process is a method that includes mixing a precursor material with an organic solvent and then growing a quantum dot particle crystal. When the quantum dot particle crystal grows, the organic solvent naturally acts as a dispersant coordinated on the surface of the quantum dot particle crystal and controls the growth of the quantum dot particle crystal, so that the growth of the quantum dot crystal particles can be controlled or selected by a process that is lower in cost and easier than a vapor deposition method (such as a metal organic chemical vapor deposition process or a molecular beam epitaxy process).

[0363] The quantum dots may include Group II-VI semiconductor compounds, Group III-V semiconductor compounds, Group III-VI semiconductor compounds, Group I-III-VI semiconductor compounds, Group IV-VI semiconductor compounds, Group IV elements or compounds, or combinations thereof.

[0364] Examples of Group II-VI semiconductor compounds may include: binary compounds such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe or MgS; ternary compounds such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe or MgZnS; quaternary compounds such as CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe or HgZnSTe; or combinations thereof.

[0365] Examples of III-V semiconductor compounds may include binary compounds such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, or InSb; ternary compounds such as GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, or InPSb; quaternary compounds such as GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, or InAlPSb; or combinations thereof. In some embodiments, the III-V semiconductor compound may further include a Group II element. Examples of the Group III-V semiconductor compound further including the Group II element are InZnP, InGaZnP, InAlZnP, and the like.

[0366] Examples of III-VI semiconductor compounds may include binary compounds such as GaS, Ga 2 Se 3 、GaTe、InS、InSe、In 2 S 3 、In 2 Se 3 , InTe, etc.; ternary compounds, such as InGaS 3 、InGaSe 3 etc.; or a combination thereof.

[0367] Examples of Group I-III-VI semiconductor compounds may include: ternary compounds such as AgInS, AgInS 2 、AgInSe 2 、AgGaS、AgGaS 2 、AgGaSe 2 、CuInS、CuInS 2 、CuInSe 2 、CuGaS 2 、CuGaSe 2 、CuGaO 2 、AgGaO 2 、AgAlO 2 etc.; quaternary compounds, such as AgInGaS 2 、AgInGaSe 2 etc.; or a combination thereof.

[0368] Examples of Group IV-VI semiconductor compounds may include: binary compounds such as SnS, SnSe, SnTe, PbS, PbSe or PbTe; ternary compounds such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe or SnPbTe; quaternary compounds such as SnPbSSe, SnPbSeTe or SnPbSTe; or combinations thereof.

[0369] Examples of Group IV elements or compounds may include: single elements such as Si and / or Ge, etc.; binary compounds such as SiC and / or SiGe, etc.; or combinations thereof.

[0370] Each element included in the multi-element compound (such as a binary compound, a ternary compound, and a quaternary compound) may be present in the particle in a substantially uniform concentration or a substantially non-uniform concentration. For example, the above formula refers to the type (species) of the element included in the compound, wherein the ratio of the elements in the compound may vary. For example, AgInGaS 2 AgIn x Ga 1-x S 2 (where 0 <x<1)。

[0371] In some embodiments, the quantum dot may have a single structure in which the concentration of each element in the quantum dot is substantially uniform, or a core-shell dual structure. For example, the material included in the core and the material included in the shell may be different from each other.

[0372] The shell of the quantum dot may act as a protective layer to prevent chemical denaturation of the core to maintain semiconductor properties, and / or as a charging layer to impart electrophoretic properties to the quantum dot. The shell may be a single layer or multiple layers. The interface between the core and the shell may have a concentration gradient in which the concentration of the element present in the shell decreases toward the center of the core.

[0373] Examples of quantum dot shells may be metal or non-metal oxides, semiconductor compounds, and combinations thereof. Examples of metal or non-metal oxides are binary compounds, such as SiO 2 、Al 2 O 3 、TiO 2 、ZnO、MnO、Mn 2 O 3 , Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 or NiO; ternary compounds, such as MgAl 2 O 4 、CoFe 2 O 4 、NiFe 2 O 4 or CoMn 2 O 4 ; and combinations thereof. As described herein, examples of semiconductor compounds are III-VI semiconductor compounds; II-VI semiconductor compounds; III-V semiconductor compounds; III-VI semiconductor compounds; I-III-VI semiconductor compounds; IV-VI semiconductor compounds; and combinations thereof. For example, the semiconductor compounds may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaS, GaSe, AgGaS, AgGaS 2 , GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb or a combination thereof.

[0374] Each element included in the multi-element compound (such as binary compound and ternary compound) can be present in the particle with a substantially uniform or substantially non-uniform concentration. For example, the above formula refers to the type (species) of the element included in the compound, wherein the ratio of the elements in the compound can be changed.

[0375] The full width at half maximum (FWHM) of the emission wavelength spectrum of the quantum dots can be about 45 nm or less, for example, about 40 nm or less, for example, about 30 nm or less, and within these ranges, color purity and / or color reproducibility can be increased. In some embodiments, because the light emitted by the quantum dots is emitted in all directions, the wide viewing angle can be improved.

[0376] In some embodiments, quantum dots may include spherical nanoparticles, pyramidal nanoparticles, multi-armed nanoparticles, cubic nanoparticles, nanotubes, nanowires, nanofibers, or nanoplates (e.g., may be in the form of spherical nanoparticles, pyramidal nanoparticles, multi-armed nanoparticles, cubic nanoparticles, nanotubes, nanowires, nanofibers, or nanoplates).

[0377] Because the energy band gap can be controlled or selected by adjusting the size of the quantum dots or the ratio of elements in the quantum dot compound, one or more appropriate wavelength bands of light can be obtained from the emission layer containing the quantum dots. Therefore, by using the aforementioned quantum dots (using quantum dots of different sizes or quantum dot compounds with different element ratios), a light-emitting device configured to emit light of one or more appropriate wavelength bands can be realized. In more detail, the size of the quantum dots or the ratio of elements in the quantum dot compound can be selected to emit red light, green light and / or blue light. In some embodiments, the size of the quantum dots can be configured to emit white light through a combination of one or more appropriate colors of light.

[0378] Electron transport region 144

[0379] The electron transport region 144 may have i) a single layer structure consisting of a single layer including a single material, ii) a single layer structure consisting of a single layer including multiple materials different from each other, or iii) a multilayer structure consisting of multiple layers including multiple different materials different from each other.

[0380] The electron transport region 144 may include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, an electron injection layer, or a combination thereof.

[0381] In some embodiments, the electron transport region 144 may have an electron transport layer / electron injection layer structure, a hole blocking layer / electron transport layer / electron injection layer structure, an electron control layer / electron transport layer / electron injection layer structure, or a buffer layer / electron transport layer / electron injection layer structure, wherein for each structure, the constituent layers are stacked sequentially from the emission layer 131.

[0382] In some embodiments, the electron transport region 144 (eg, a buffer layer, a hole blocking layer, an electron control layer, or an electron transport layer in the electron transport region 144) may include a nitrogen-containing C 1 -C 60Metal-free compounds of cyclic groups.

[0383] For example, the electron transport region 144 may include a compound represented by Formula 601:

[0384] Formula 601

[0385] [Ar 601 ] xe11 -[(L 601 ) xe1 -R 601 ] xe21 ,

[0386] Wherein, in Formula 601,

[0387] Ar 601 and L 601 may be each independently unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group,

[0388] xe11 can be 1, 2 or 3,

[0389] xe1 can be 0, 1, 2, 3, 4 or 5,

[0390] R 601 may be unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group, -Si(Q 601 )(Q 602 )(Q 603 )、-C(=O)(Q 601 )、-S(=O) 2 (Q 601 ) or -P(=O)(Q 601 )(Q 602 ),

[0391] Q 601 To Q 603 can be respectively compared with the Q 1 Same as described,

[0392] xe21 can be 1, 2, 3, 4, or 5, and

[0393] Ar 601 , L601 or R 601 At least one of them may be independently unsubstituted or substituted by at least one R 10a Substituted π-electron-deficient nitrogen-containing C 1 -C 60 Cyclic group.

[0394] For example, when xe11 in Formula 601 is 2 or greater, two or more Ar 601 Can be connected to each other via a single bond.

[0395] In some embodiments, Ar in Formula 601 601 may be unsubstituted or substituted with at least one R 10a Substituted anthracenyl.

[0396] In one or more embodiments, the electron transport region 144 may include a compound represented by Formula 601-1:

[0397] Formula 601-1

[0398]

[0399] Among them, in formula 601-1,

[0400] X 614 Can be N or C(R 614 ), X 615 Can be N or C(R 615 ), X 616 Can be N or C(R 616 ), and X 614 To X 616 At least one of may be N,

[0401] L 611 To L 613 can be respectively compared with the L 601 Same as described,

[0402] xe611 to xe613 may each be the same as described herein for xe1,

[0403] R 611 To R 613 can be respectively compared with the R 601 Same as described, and

[0404] R 614 To R 616 can be independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 1 -C 20 Alkyl, C 1 -C 20Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C 3 -C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heterocyclic group.

[0405] For example, xe1 in Formula 601 and xe611 to xe613 in Formula 601-1 can each independently be 0, 1, or 2.

[0406] The electron transport region 144 may include (for example, selected from) one of the compounds ET1 to ET45, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), tris(8-hydroxyquinoline)aluminum (Alq 3 ), bis(2-methyl-8-hydroxyquinoline-N1,08)-(1,1'-biphenyl-4-hydroxy)aluminum (BAlq), 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ), 4-(naphthalene-1-yl)-3,5-diphenyl-4H-1,2,4-triazole (NTAZ), or a combination thereof:

[0407]

[0408]

[0409]

[0410]

[0411] The thickness of the electron transport region 144 may be about to about For example, about to about When the electron transport region 144 includes a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, or a combination thereof, the thickness of the buffer layer, the hole blocking layer, or the electron control layer may be independently about to about For example, about to about And the thickness of the electron transport layer can be about to about For example, about to about When the thickness of the buffer layer, the hole blocking layer, the electron control layer, the electron transport layer and / or the electron transport region 144 is within these ranges, satisfactory electron transport characteristics may be obtained without significantly increasing the driving voltage.

[0412] The electron transport region 144 (eg, an electron transport layer in the electron transport region 144 ) may further include a metal-containing material in addition to the above-mentioned materials.

[0413] The metal-containing material may include an alkali metal complex, an alkaline earth metal complex, or a combination thereof. The metal ion of the alkali metal complex may be a Li ion, a Na ion, a K ion, a Rb ion, or a Cs ion, and the metal ion of the alkaline earth metal complex may be a Be ion, a Mg ion, a Ca ion, a Sr ion, or a Ba ion. The ligand coordinated with the metal ion of the alkali metal complex or the metal ion of the alkaline earth metal complex may include hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline, cyclopentadiene, or a combination thereof.

[0414] For example, the metal-containing material may include a Li complex. The Li complex may include, for example, compound ET-D1 (Liq) or compound ET-D2:

[0415]

[0416] The electron transport region 144 may include an electron injection layer that facilitates injection of electrons from the second electrode 150. The electron injection layer may directly contact the second electrode 150.

[0417] The electron injection layer may have i) a single layer structure consisting of a single layer including a single material, ii) a single layer structure consisting of a single layer including a plurality of different materials different from each other, or iii) a multilayer structure consisting of a plurality of layers including different materials different from each other.

[0418] The electron injection layer may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or a combination thereof.

[0419] The alkali metal may include Li, Na, K, Rb, Cs or a combination thereof. The alkaline earth metal may include Mg, Ca, Sr, Ba or a combination thereof. The rare earth metal may include Sc, Y, Ce, Tb, Yb, Gd or a combination thereof.

[0420] The alkali metal-containing compound, the alkaline earth metal-containing compound, and the rare earth metal-containing compound may be oxides, halides (eg, fluorides, chlorides, bromides, or iodides), or tellurides of alkali metals, alkaline earth metals, and rare earth metals, or a combination thereof.

[0421] Alkali metal compounds may include: alkali metal oxides, such as Li 2 O、Cs2 O or K 2 O; an alkali metal halide, such as LiF, NaF, CsF, KF, LiI, NaI, CsI or KI; or a combination thereof. The alkaline earth metal compound may include an alkaline earth metal oxide, such as BaO, SrO, CaO, Ba x Sr 1-x O (where x is a real number satisfying the condition 0 < x < 1) and / or Ba x Ca 1-x O (where x is a real number satisfying the condition 0 < x < 1), etc. The rare earth metal compound may include YbF 3 , ScF 3 , Sc 2 O 3 , Y 2 O 3 , Ce 2 O 3 , GdF 3 , TbF 3 , YbI 3 , ScI 3 , TbI 3 or a combination thereof. In one or more embodiments, the rare earth metal compound may include a lanthanide metal telluride. Examples of lanthanide metal tellurides are LaTe, CeTe, PrTe, NdTe, PmTe, SmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, La 2 Te 3 , Ce 2 Te 3 , Pr 2 Te 3 , Nd 2 Te 3 , Pm 2 Te 3 , Sm 2 Te 3 , Eu 2 Te 3 , Gd 2 Te 3 , Tb 2 Te 3 , Dy 2 Te 3 , Ho 2 Te 3 , Er 2 Te 3 , Tm 2 Te 3 , Yb 2 Te 3 and Lu 2Te 3 .

[0422] The alkali metal complex, alkaline earth metal complex and rare earth metal complex may include i) one of the metal ions of alkali metal, alkaline earth metal and rare earth metal, and ii) a ligand bonded to the metal ion, for example, hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline, cyclopentadiene or a combination thereof.

[0423] As described above, the electron injection layer may include (e.g., consist of) an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or a combination thereof. In one or more embodiments, the electron injection layer may further include an organic material (e.g., a compound represented by Formula 601).

[0424] In one or more embodiments, the electron injection layer may include (e.g., consist of): i) an alkali metal compound (e.g., an alkali metal halide); or ii) a) an alkali metal compound (e.g., an alkali metal halide) and b) an alkali metal, an alkaline earth metal, a rare earth metal, or a combination thereof. For example, the electron injection layer may be a KI:Yb co-deposition layer, a RbI:Yb co-deposition layer, and / or a LiF:Yb co-deposition layer, etc.

[0425] When the electron injection layer further includes an organic material, an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex or a combination thereof may be uniformly or non-uniformly dispersed in a matrix including the organic material.

[0426] The thickness of the electron injection layer can be about to about And, for example, about to about When the thickness of the electron injection layer is within the above range, satisfactory electron injection characteristics can be obtained without significantly increasing the driving voltage.

[0427] The second electrode 150

[0428] The second electrode 150 may be disposed on the electron transport region 144. The second electrode 150 may be a cathode as an electron injection electrode, and as a material for forming the second electrode 150, metals, alloys, conductive compounds, or combinations thereof each having a low work function may be used.

[0429] The second electrode 150 may include Li, Ag, Mg, Al, Al-Li, Ca, Mg-In, Mg-Ag, Yb, Ag-Yb, ITO, IZO, or a combination thereof. The second electrode 150 may be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.

[0430] The second electrode 150 may have a single-layer structure, or a multi-layer structure including a plurality of layers.

[0431] Capping layer

[0432] The first capping layer may be located outside the first electrode 110 and / or the second capping layer may be located outside the second electrode 150. Specifically, the light emitting device 10 may have a structure in which the first capping layer, the first electrode 110, the interlayer 130, and the second electrode 150 are sequentially stacked in the stated order, a structure in which the first electrode 110, the interlayer 130, the second electrode 150 and the second capping layer are sequentially stacked in the stated order, or a structure in which the first capping layer, the first electrode 110, the interlayer 130, the second electrode 150 and the second capping layer are sequentially stacked in the stated order.

[0433] Light generated in the emission layer 131 of the light emitting device 10 may be extracted toward the outside through the first electrode 110 as a semi-transmissive electrode or a transmissive electrode and the first capping layer. Light generated in the emission layer 131 of the light emitting device 10 may be extracted toward the outside through the second electrode 150 as a semi-transmissive electrode or a transmissive electrode and the second capping layer.

[0434] The first capping layer and the second capping layer may increase external emission efficiency according to the principle of constructive interference, and accordingly, light extraction efficiency of the light emitting device 10 may be increased, so that the light emitting efficiency of the light emitting device 10 may be improved.

[0435] Each of the first capping layer and the second capping layer may include a material having a refractive index greater than or equal to about 1.2 (at a wavelength of about 460 nm).

[0436] The first capping layer and the second capping layer may each independently be an organic capping layer including an organic material, an inorganic capping layer including an inorganic material, or an organic-inorganic composite capping layer including an organic material and an inorganic material.

[0437] At least one of the first capping layer and the second capping layer may each independently include a carbocyclic compound, a heterocyclic compound, an amine-containing compound, a porphyrin derivative, a phthalocyanine derivative, a naphthalocyanine derivative, an alkali metal complex, an alkaline earth metal complex, or a combination thereof. Optionally, the carbocyclic compound, the heterocyclic compound, and the amine-containing compound may be substituted with a substituent including O, N, S, Se, Si, F, Cl, Br, I, or a combination thereof. In one or more embodiments, at least one of the first capping layer and the second capping layer may each independently include an amine-containing compound.

[0438] For example, at least one of the first capping layer and the second capping layer may each independently include the compound represented by Formula 201, the compound represented by Formula 202, or a combination thereof.

[0439] In one or more embodiments, at least one of the first capping layer and the second capping layer may each independently include (e.g., selected from) at least one of compounds HT28 to HT33, (e.g., selected from) at least one of compounds CP1 to CP6, β-NPB, or a combination thereof:

[0440]

[0441] membrane

[0442] The electronic device may further include a film. The film may be, for example, an optical member (or light control device) (e.g., a color filter, a color conversion member, a capping layer, a light extraction efficiency enhancement layer, a selective light absorption layer, a polarization layer, or a quantum dot content layer, etc.), a light blocking member (e.g., a light reflecting layer and / or a light absorbing layer, etc.), a protective member (e.g., an insulating layer and / or a dielectric layer, etc.).

[0443] Electronic devices

[0444] The light emitting device may be included in one or more suitable electronic devices. For example, the electronic device including the light emitting device may be a display device and / or an authentication device, etc.

[0445] In addition to the light emitting device, the electronic device (e.g., a display device) may further include i) a color filter, ii) a color conversion layer, or iii) a color filter and a color conversion layer. The color filter and / or the color conversion layer may be located in at least one direction in which the light emitted from the light emitting device travels. For example, the light emitted from the light emitting device may be blue light or white light. For more details about the light emitting device, reference may be made to the description provided above. In one or more embodiments, the color conversion layer may include quantum dots. The quantum dots may be, for example, the quantum dots described herein.

[0446] The electronic device may include a first substrate, the first substrate may include a plurality of sub-pixel regions, the color filter may include a plurality of color filter regions respectively corresponding to the plurality of sub-pixel regions, and the color conversion layer may include a plurality of color conversion regions respectively corresponding to the plurality of sub-pixel regions.

[0447] The pixel defining layer may be located between the plurality of sub-pixel regions to define each of the plurality of sub-pixel regions.

[0448] The color filter may further include a plurality of color filter regions and a light shielding pattern between the plurality of color filter regions, and the color conversion layer may further include a plurality of color conversion regions and a light shielding pattern between the plurality of color conversion regions.

[0449] A plurality of color filter regions (or a plurality of color conversion regions) may include a first region emitting a first color light, a second region emitting a second color light, and / or a third region emitting a third color light, wherein the first color light, the second color light, and / or the third color light may have different maximum emission wavelengths from each other. For example, the first color light may be red light, the second color light may be green light, and the third color light may be blue light. For example, a plurality of color filter regions (or a plurality of color conversion regions) may include quantum dots. Specifically, the first region may include red quantum dots, the second region may include green quantum dots, and the third region may not include (e.g., may exclude) quantum dots. For more details about quantum dots, reference may be made to the relevant description provided herein. The first region, the second region, and / or the third region may each include a scatterer.

[0450] For example, the light emitting device may be configured to emit a first light, the first region may be configured to absorb the first light to emit a first-first color light, the second region may be configured to absorb the first light to emit a second-first color light, and the third region may be configured to absorb the first light to emit a third-first color light. In this regard, the first-first color light, the second-first color light, and the third-first color light may have different maximum emission wavelengths. Specifically, the first light may be blue light, the first-first color light may be red light, the second-first color light may be green light, and the third-first color light may be blue light.

[0451] In addition to the light emitting device described above, the electronic device may further include a thin film transistor. The thin film transistor may include a source electrode, a drain electrode and an active layer, wherein any one of the source electrode and the drain electrode may be electrically connected to any one of the first electrode and the second electrode of the light emitting device.

[0452] The thin film transistor may further include a gate electrode and / or a gate insulating film, etc.

[0453] The active layer may include crystalline silicon, amorphous silicon, an organic semiconductor, and / or an oxide semiconductor, etc.

[0454] The electronic device may further include a sealing portion for sealing the light emitting device. The sealing portion may be located between the color filter and / or the color conversion layer and the light emitting device. The sealing portion allows light from the light emitting device to be extracted to the outside, and simultaneously (e.g., synchronously) prevents ambient air and moisture from penetrating into the light emitting device. The sealing portion may be a sealing substrate including a transparent glass substrate or a plastic substrate. The sealing portion may be a thin film encapsulation layer including at least one of an organic layer and an inorganic layer. When the sealing portion is a thin film encapsulation layer, the electronic device may be flexible.

[0455] Depending on the purpose of the electronic device, in addition to the color filter and / or the color conversion layer, one or more appropriate functional layers may be additionally located on the sealing portion. Examples of the functional layer may include a touch screen layer and / or a polarization layer, etc. The touch screen layer may be a pressure-sensitive touch screen layer, a capacitive touch screen layer, or an infrared touch screen layer. The authentication device may be, for example, a biometric authentication device that authenticates an individual by using biometric information of a living body (e.g., a fingertip, a pupil, etc.).

[0456] In addition to the light emitting device as described above, the authentication device may further include a biometric information collector.

[0457] The electronic device can be applied to one or more appropriate displays, light sources, lighting equipment, personal computers (e.g., mobile personal computers), mobile phones, digital cameras, electronic notebooks, electronic dictionaries, electronic game consoles, medical tools (e.g., electronic thermometers, blood pressure monitors, blood glucose meters, pulse measuring devices, pulse wave measuring devices, electrocardiogram displays, ultrasound diagnostic devices, or endoscope displays), fish finders, one or more appropriate measuring tools, instruments (e.g., instruments for vehicles, aircraft, and ships), and / or projectors, etc.

[0458] Electronic equipment

[0459] The light emitting device may be included in one or more suitable electronic equipment.

[0460] For example, the electronic equipment including the light emitting device may be a flat panel display, a curved display, a computer monitor, a medical monitor, a television, a billboard, an indoor light, an outdoor light, a signal light, a head-up display, a fully transparent or partially transparent display, a flexible display, a rollable display, a foldable display, a retractable display, a laser printer, a phone, a mobile phone, a tablet personal computer, a tablet phone, a personal digital assistant (PDA), a wearable device, a laptop computer, a digital camera, a video camera, a viewfinder, a microdisplay, a 3D display, a virtual reality or augmented reality display, a vehicle, a video wall including multiple displays stitched together, a theater or stadium screen, a light therapy device, or a sign.

[0461] Since the light emitting device has the effects of improved driving voltage, excellent or appropriate light emitting efficiency, and long lifespan, electronic equipment including the light emitting device may have characteristics of high brightness, high resolution, and low power consumption.

[0462] Figure 2 Description

[0463] The light emitting device 10 may include a first electrode 110, a hole injection layer 121-1, a first hole transport layer 121-3, a first electron blocking layer 121-5, a second emission layer 132, a first hole blocking layer 141-1, a first electron transport layer 141-3, a 1n charge generation layer 161n, a 1p charge generation layer 161p, a second hole transport layer 122-3, a second electron blocking layer 122-5, a third emission layer 133, a second hole blocking layer 142-1, a second electron transport layer 142-3, a 2n charge generation layer 161n, a 1p charge generation layer 161p, a second hole transport layer 122-3, a second electron blocking layer 122-5, a third emission layer 133, a second hole blocking layer 142-1, a second electron transport layer 142-3, a 2n charge generation layer Layer 162n, 2p charge generation layer 162p, third hole transport layer 123-3, third electron blocking layer 123-5, fourth emission layer 134, third hole blocking layer 143-1, third electron transport layer 143-3, 3n charge generation layer 163n, 3p charge generation layer 163p, fourth hole transport region 124, first emission layer 131 (including 1a emission layer 131a and 1b emission layer 131b), fourth electron transport layer 144-3, electron injection layer 144-5 and second electrode 150. Figure 2 The light-emitting device 10 explained in the text may have a series structure in which four hole transport regions (121, 122, 123 and 124) are arranged apart from each other, four emission layers (131, 132, 133 and 134) are arranged apart from each other, four electron transport regions (141, 142, 143 and 144) are arranged apart from each other, and three charge generation layers (161, 162 and 163) are arranged apart from each other; however, the light-emitting device 10 according to the present disclosure is not limited thereto. For example, the light-emitting device 10 according to the present disclosure may i) include one emission layer but not a charge generation layer, ii) include two emission layers and one charge generation layer arranged apart from each other, iii) include three emission layers arranged apart from each other and two charge generation layers arranged apart from each other, or iv) include five emission layers and four charge generation layers arranged apart from each other. About Figure 1 The description of the emission layer 131 can be applied to Figure 2 The first emission layer 131, the second emission layer 132, the third emission layer 133 and the fourth emission layer 134 are shown in FIG.

[0464] Figure 3 and Figure 4 Description

[0465] Figure 3 is a cross-sectional view of an electronic device according to some embodiments.

[0466] Figure 3 The electronic device may include a substrate 100 , a thin film transistor TFT, a light emitting device, and a packaging part 300 .

[0467] The substrate 100 may be a flexible substrate, a glass substrate, or a metal substrate. The buffer layer 210 may be disposed on the substrate 100. The buffer layer 210 may prevent or reduce penetration of impurities through the substrate 100 and may provide a flat surface on the substrate 100.

[0468] The thin film transistor TFT may be disposed on the buffer layer 210. The thin film transistor TFT may include an active layer 220, a gate electrode 240, a source electrode 260, and a drain electrode 270.

[0469] The active layer 220 may include an inorganic semiconductor such as silicon or polysilicon, an organic semiconductor, or an oxide semiconductor, and may include a source region, a drain region, and a channel region.

[0470] A gate insulating film 230 for insulating the active layer 220 from the gate electrode 240 may be disposed on the active layer 220 , and the gate electrode 240 may be disposed on the gate insulating film 230 .

[0471] An interlayer insulating film 250 may be disposed on the gate electrode 240. The interlayer insulating film 250 may be located between the gate electrode 240 and the source electrode 260 to insulate the gate electrode 240 from the source electrode 260 and between the gate electrode 240 and the drain electrode 270 to insulate the gate electrode 240 from the drain electrode 270.

[0472] Source electrode 260 and drain electrode 270 may be disposed on interlayer insulating film 250. Interlayer insulating film 250 and gate insulating film 230 may be formed to expose source and drain regions of active layer 220, and source electrode 260 and drain electrode 270 may be located at exposed portions contacting source and drain regions of active layer 220.

[0473] The thin film transistor TFT is electrically connected to the light emitting device to drive the light emitting device, and is covered and protected by the passivation layer 280. The passivation layer 280 may include an inorganic insulating film, an organic insulating film, or a combination thereof. The light emitting device is provided on the passivation layer 280. The light emitting device may include a first electrode 110, an interlayer 130, and a second electrode 150.

[0474] The first electrode 110 may be disposed on the passivation layer 280. The passivation layer 280 may be positioned to expose a portion of the drain electrode 270 instead of completely covering the drain electrode 270, and the first electrode 110 may be positioned to be connected to the exposed portion of the drain electrode 270.

[0475] A pixel defining layer 290 including an insulating material may be disposed on the first electrode 110. The pixel defining layer 290 may expose a certain area of ​​the first electrode 110, and the interlayer 130 may be formed in the exposed area of ​​the first electrode 110. The pixel defining layer 290 may be a polyimide-based organic film or a polyacrylic organic film. In some embodiments, at least some layers of the interlayer 130 may extend beyond the upper portion of the pixel defining layer 290, and may thus be positioned in the form of a common layer.

[0476] The second electrode 150 may be disposed on the interlayer 130, and the capping layer 170 may be additionally formed on the second electrode 150. The capping layer 170 may be formed to cover the second electrode 150.

[0477] The encapsulation part 300 may be disposed on the capping layer 170. The encapsulation part 300 may be located on the light emitting device to protect the light emitting device from moisture or oxygen. The encapsulation part 300 may include: an inorganic film including silicon nitride (SiN x ), silicon oxide (SiO x ), indium tin oxide, indium zinc oxide or any combination thereof; organic films including polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyvinyl sulfonate, polyoxymethylene, polyaromatic ester, hexamethyldisiloxane, acrylic resins (e.g., polymethyl methacrylate and / or polyacrylic acid, etc.), epoxy resins (e.g., aliphatic glycidyl ether (AGE), etc.) or combinations thereof; or combinations of inorganic films and organic films.

[0478] Figure 4 is a schematic cross-sectional view of an electronic device according to some embodiments.

[0479] Figure 4 Electronic equipment and Figure 3 The electronic device is the same as the electronic device of the present invention, except that the light shielding pattern 500 and the functional area 400 are additionally arranged on the packaging portion 300. The functional area 400 may include i) a color filter area, ii) a color conversion area, or iii) a combination of a color filter area and a color conversion area. In some embodiments, Figure 4 The light-emitting device included in the electronic device may be a series light-emitting device.

[0480] Figure 5 Description

[0481] Figure 5Schematic perspective view of an electronic device 1 including a light-emitting device according to some embodiments. As a device for displaying moving images or still images, the electronic device 1 may be a portable electronic device, such as a mobile phone, a smart phone, a tablet personal computer (PC), a mobile communication terminal, an electronic notebook computer, an e-book, a portable multimedia player (PMP), a navigation device or an ultra mobile personal computer (UMPC), and one or more suitable products, such as a television, a laptop computer, a monitor, a billboard or an Internet of Things (IoT) device. The electronic device 1 may be the above product or a part thereof. In some embodiments, the electronic device 1 may be a wearable device, such as a smart watch, a watch phone, a display of the type or kind of glasses or a head-mounted display (HMD) or a part of a wearable device. However, the embodiments of the present disclosure are not limited thereto. For example, the electronic equipment 1 may include a dashboard of a vehicle, a center console of a vehicle, a central information display arranged on the dashboard of a vehicle, an interior rearview mirror display replacing a side mirror of a vehicle, an entertainment display for a rear seat of a vehicle or a display arranged on a backrest of a front seat, a head-up display (HUD) mounted in front of the vehicle or projected on a front windshield, or a computer-generated holographic augmented reality head-up display (CGH AR HUD). For convenience of explanation, Figure 5 Explained is a case in which the electronic equipment 1 is a smart phone.

[0482] The electronic equipment 1 may include a display area DA and a non-display area NDA outside the display area DA. The electronic equipment 1 may realize an image through an array of a plurality of pixels two-dimensionally arranged in the display area DA.

[0483] The non-display area NDA is an area where no image is displayed, and may completely surround the display area DA. In the non-display area NDA, a driver for providing an electrical signal or power to a display element arranged in the display area DA may be arranged. In the non-display area NDA, a pad that may be electrically connected to an electronic element or a printed circuit board may be arranged.

[0484] The length of the electronic device 1 on the x-axis may be different from the length of the electronic device 1 on the y-axis. Figure 5 As shown in FIG. 1 , the length in the x-axis direction may be shorter than the length in the y-axis direction. In one or more embodiments, the length in the x-axis direction may be the same as the length in the y-axis direction. In one or more embodiments, the length in the x-axis direction may be longer than the length in the y-axis direction.

[0485] Figure 6 and 7A to 7C Description

[0486] Figure 6A diagram for explaining the exterior of a vehicle 1000 as electronic equipment including a light emitting device according to some embodiments. 7A to 7C Each is a diagram schematically illustrating the interior of a vehicle 1000 according to one or more embodiments.

[0487] refer to Figure 6 and 7A to 7C The vehicle 1000 may refer to one or more suitable devices for moving an object to be transported (such as a person, object, or animal) from a starting point to a destination point. The vehicle 1000 may include a vehicle traveling on roads or tracks, a ship moving on the sea or river, and / or an airplane flying in the air using the action of air, etc.

[0488] The vehicle 1000 may travel on a road or a track. The vehicle 1000 may move in a set or predetermined direction according to the rotation of at least one wheel. For example, the vehicle 1000 may include a three-wheeled or four-wheeled vehicle, an engineering machine, a two-wheeled vehicle, a prime mover device, a bicycle, and a train traveling on a track.

[0489] The vehicle 1000 may include a body having an interior and an exterior, and a chassis in which mechanical equipment required for driving is installed as other parts other than the body. The exterior of the body may include a front panel, a hood, a roof panel, a rear panel, a trunk, and / or pillars provided at the boundaries between doors, etc. The chassis of the vehicle 1000 may include a power generation device, a power transmission device, a drive device, a steering device, a brake device, a suspension device, a transmission device, a fuel device, front and rear wheels, and / or left and right wheels, etc.

[0490] The vehicle 1000 may include side window glasses 1100 , a front window glass 1200 , side view mirrors 1300 , an instrument panel 1400 , a center console 1500 , a passenger seat instrument panel 1600 , and a display device 2 .

[0491] The side window glass 1100 and the front window glass 1200 may be separated by pillars disposed between the side window glass 1100 and the front window glass 1200 .

[0492] The side window glass 1100 may be mounted on the side of the vehicle 1000. In some embodiments, the side window glass 1100 may be mounted on a door of the vehicle 1000. A plurality of side window glasses 1100 may be provided and may face each other. In some embodiments, the side window glass 1100 may include a first side window glass 1110 and a second side window glass 1120. In some embodiments, the first side window glass 1110 may be arranged adjacent to the instrument panel 1400. The second side window glass 1120 may be arranged adjacent to the passenger seat instrument panel 1600.

[0493] In some embodiments, the side window glass 1100 may be spaced apart from each other in the x-axis direction or in a direction opposite to the x-axis direction. For example, the first side window glass 1110 and the second side window glass 1120 may be spaced apart from each other in the x-axis direction or in a direction opposite to the x-axis direction. In other words, the imaginary straight line L connecting the side window glass 1100 may extend in the x-axis direction or in a direction opposite to the x-axis direction. For example, the imaginary straight line L connecting the first side window glass 1110 and the second side window glass 1120 to each other may extend in the x-axis direction or in a direction opposite to the x-axis direction.

[0494] The front window glass 1200 may be installed at the front of the vehicle 1000. The front window glass 1200 may be disposed between the side window glasses 1100 facing each other.

[0495] The side view mirror 1300 may provide a rear view of the vehicle 1000. The side view mirror 1300 may be mounted on the exterior of the vehicle body. In one embodiment, a plurality of side view mirrors 1300 may be provided. Any one of the plurality of side view mirrors 1300 may be arranged outside the first side window glass 1110. Another one of the plurality of side view mirrors 1300 may be arranged outside the second side window glass 1120.

[0496] The instrument panel 1400 may be arranged in front of the steering wheel. The instrument panel 1400 may include a tachometer, a speedometer, a coolant temperature gauge, a fuel gauge, a turn indicator, a high beam indicator, a warning light, a seat belt warning light, an odometer, a tachometer, an automatic shift lever indicator light, a door open warning light, an oil warning light, and / or a low fuel warning light.

[0497] The center console 1500 may include a control panel on which a plurality of buttons for adjusting an audio device, an air conditioning device, and a seat heater are provided. The center console 1500 may be disposed on one side of the instrument panel 1400 .

[0498] The passenger seat instrument panel 1600 may be spaced apart from the instrument panel 1400, and the center console 1500 is disposed between the passenger seat instrument panel 1600 and the instrument panel 1400. In some embodiments, the instrument panel 1400 may be disposed to correspond to the driver's seat, and the passenger seat instrument panel 1600 may be disposed to correspond to the passenger seat. In some embodiments, the instrument panel 1400 may be adjacent to the first side window glass 1110, and the passenger seat instrument panel 1600 may be adjacent to the second side window glass 1120.

[0499] In some embodiments, the display device 2 may include a display panel 3, and the display panel 3 may display an image. The display device 2 may be arranged inside the vehicle 1000. In some embodiments, the display device 2 may be arranged between side window glasses 1100 facing each other. The display device 2 may be arranged on at least one of the instrument panel 1400, the center console 1500, and the passenger seat instrument panel 1600.

[0500] The display device 2 may include an organic light-emitting display device, an inorganic light-emitting display device, and / or a quantum dot display device, etc. Hereinafter, as the display device 2 according to some embodiments, an organic light-emitting display device including a light-emitting device according to some embodiments will be described as an example, however, the embodiments may include one or more appropriate types (kinds) of display devices.

[0501] refer to Fig. 7A , the display device 2 may be arranged on the center console 1500. In some embodiments, the display device 2 may display navigation information. In an embodiment, the display device 2 may display audio, video, or information about vehicle settings.

[0502] refer to Figure 7B , the display device 2 may be arranged on the instrument panel 1400. When the display device 2 is arranged on the instrument panel 1400, the instrument panel 1400 may display driving information and the like through the display device 2. For example, the instrument panel 1400 may be implemented digitally. The instrument panel 1400 may digitally display vehicle information and driving information as images. For example, the pointer and instrument of the tachometer and one or more appropriate warning lights or icons may be displayed through digital signals.

[0503] refer to Figure 7C , the display device 2 may be arranged on the passenger seat instrument panel 1600. The display device 2 may be embedded in the passenger seat instrument panel 1600 or arranged on the passenger seat instrument panel 1600. In some embodiments, the display device 2 arranged on the passenger seat instrument panel 1600 may display images related to the information displayed on the instrument panel 1400 and / or the information displayed on the center console 1500. In one or more embodiments, the display device 2 arranged on the passenger seat instrument panel 1600 may display information different from the information displayed on the instrument panel 1400 and / or the information displayed on the center console 1500.

[0504] Manufacturing method

[0505] The layer constituting the hole transport region 121, the emission layer 131 and the layer constituting the electron transport region 144 can be formed in a certain region by using one or more appropriate methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, inkjet printing, laser printing and / or laser induced thermal imaging.

[0506] When the layer constituting the hole transport region 121, the emission layer 131, and the layer constituting the electron transport region 144 are formed by vacuum deposition, the deposition temperature may be about 100° C. to about 500° C., about 10 -8 To about 10 -3 Torr vacuum and about to about Deposition is carried out at a deposition rate of .

[0507] Definition of terms

[0508] As used herein, the term "C 3 -C 60 The "carbocyclic group" refers to a cyclic group consisting only of carbon as a ring-forming atom and having 3 to 60 carbon atoms.

[0509] As used herein, the term "C 1 -C 60 The "heterocyclic group" refers to a cyclic group having 1 to 60 carbon atoms and further having at least one hetero atom as a ring-constituting atom in addition to the carbon atoms.

[0510] C 3 -C 60 Carbocyclic and C 1 -C 60 The heterocyclic groups may each be a monocyclic group consisting of one ring or a polycyclic group in which two or more rings are fused to each other. 1 -C 60 The heterocyclic group has 3 to 61 ring-forming atoms.

[0511] As used herein, the term "cyclic group" may include C 3 -C 60 Carbocyclic and C 1 -C 60 Both heterocyclic groups (for example, both C 3 -C 60 Carbocyclic and C 1 -C 60 heterocyclic group).

[0512] As used herein, the term "π-electron-rich C 3 -C 60 The term "cyclic group" refers to a cyclic group having 3 to 60 carbon atoms and not including *-N=*' as a ring-constituting part.

[0513] As used herein, the term "π-electron-deficient nitrogen-containing C 1 -C 60 The "cyclic group" refers to a heterocyclic group having 1 to 60 carbon atoms and including *-N=*' as a ring-forming part.

[0514] For example, C 3 -C 60 The carbocyclic group may be i) a group T1 or ii) a fused ring group in which two or more groups T1 are fused to each other (e.g., a cyclopentadienyl group, an adamantyl group, a norbornyl group, a phenyl group, a pentalenyl group, a naphthyl group, an azulenyl group, an indacenyl group, an acenaphthenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylene group, a pyrenyl group, a 1,2-triphenylene group, a peryl group, a pentaphenanthrenyl group, a heptalenyl group, a tetracenyl group, a phenanthrenyl group, a hexacenyl group, a pentacene group, a rubinyl group, a coronet group, an ovalenyl group, an indenyl group, a fluorenyl group, a spirobifluorenyl group, a benzofluorenyl group, an indenophenanthrenyl group, or an indenoanthryl group),

[0515] C 1 -C 60 The heterocyclic group may be i) a group T2, ii) a condensed ring group in which two or more groups T2 are condensed to each other, or iii) a condensed ring group in which at least one group T2 and at least one group T1 are condensed to each other (e.g., pyrrolyl, thienyl, furyl, indolyl, benzindolyl, naphthoindolyl, isoindolyl, benzisoindolyl, naphthoisoindolyl, benzothiorolyl, benzothiophenyl, benzofuranyl, carbazolyl, dibenzothiorolyl, dibenzothiophenyl, dibenzofuranyl, indenocarbazolyl, indolecarbazolyl, benzofuranocarbazolyl, benzothiophenylcarbazolyl, benzothiorolocarbazolyl, benzoindolcarbazolyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothienyl, benzonaphthothiorolyl, benzofuranodibenzofuran ... dibenzothiophenyl, benzothiophene and dibenzothiophenyl, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, benzopyrazolyl, benzimidazolyl, benzoxazolyl, benzisoxazolyl, benzothiazolyl, benzisothiazolyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolinyl yl, benzoisoquinolyl, quinoxalinyl, benzoquinoxalinyl, quinazoline, benzoquinazolinyl, phenanthroline, cinnolinyl, phthalazinyl, naphthyridinyl, imidazopyridinyl, imidazopyrimidinyl, imidazotriazine, imidazopyrazinyl, imidazopyridazinyl, azacarbazolyl, azafluorenyl, azadibenzothiazolyl, azadibenzothiopheneyl, azadibenzofuranyl and / or xantheneyl, etc.),

[0516] Pi-electron-rich C 3 -C 60 The cyclic group may be i) a group T1, ii) a fused ring group in which two or more groups T1 are fused to each other, iii) a group T3, iv) a fused ring group in which two or more groups T3 are fused to each other, or v) a fused ring group in which at least one group T3 and at least one group T1 are fused to each other (e.g., C 3 -C60 carbocyclyl, 1H-pyrrolyl, thiolyl, borocyclopentyl, 2H-pyrrolyl, 3H-pyrrolyl, thienyl, furyl, indolyl, benzindolyl, naphthoindolyl, isoindolyl, benzisoindolyl, naphthoisoindolyl, benzothiolyl, benzothiophenyl, benzofuranyl, carbazolyl, dibenzothiolyl, dibenzothiophenyl, dibenzofuranyl, indenocarbazolyl, indolcarbazolyl, benzofuranocarbazolyl, benzothiophenylcarbazolyl, benzothiophenylcarbazolyl, benzothiophenylcarbazolyl, benzothiophenylcarbazolyl, benzoindolcarbazolyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothienyl, benzonaphthothiolyl, benzofuranodibenzofuranyl, benzofuranodibenzothiophenyl and / or benzothiophenylodibenzothiophenyl, and the like), and

[0517] π-electron-deficient nitrogen-containing C 1 -C 60 The cyclic group may be i) a group T4, ii) a fused ring group in which two or more groups T4 are fused to each other, iii) a fused ring group in which at least one group T4 and at least one group T1 are fused to each other, iv) a fused ring group in which at least one group T4 and at least one group T3 are fused to each other, or v) a fused ring group in which at least one group T4, at least one group T1 and at least one group T3 are fused to each other (e.g., pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, benzopyrazolyl , benzimidazolyl, benzoxazolyl, benzisoxazolyl, benzothiazolyl, benzisothiazolyl, pyridinyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, benzisoquinolyl, quinoxalinyl, benzoquinoxalinyl, quinazolinyl, benzoquinazolinyl, phenanthrolinyl, cinnolinyl, phthalazinyl, naphthyridinyl, imidazopyridinyl, imidazopyrimidinyl, imidazotriazinyl, imidazopyrazinyl, imidazopyridazinyl, azacarbazolyl, azafluorenyl, azadibenzothiazolyl, azadibenzothiopheneyl and / or azadibenzofuranyl).

[0518] The group T1 can be cyclopropane, cyclobutane, cyclopentane, cyclohexane, cycloheptane, cyclooctane, cyclobutenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cyclohexadienyl, cycloheptenyl, adamantyl, norbornane (or bicyclo[2.2.1]heptane) group, norbornyl, bicyclo[1.1.1]pentanyl, bicyclo[2.1.1]hexanyl, bicyclo[2.2.2]octane or phenyl.

[0519] The group T2 can be furanyl, thienyl, 1H-pyrrolyl, thiolyl, borocyclopentyl, 2H-pyrrolyl, 3H-pyrrolyl, imidazolyl, pyrazolyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, azathiolyl, azaborolyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, tetraazinyl, pyrrolidinyl, imidazolidinyl, dihydropyrrolyl, piperidinyl, tetrahydropyridinyl, dihydropyridinyl, hexahydropyrimidinyl, tetrahydropyrimidinyl, dihydropyrimidinyl, piperazinyl, tetrahydropyrazinyl, dihydropyrazinyl, tetrahydropyridazinyl or dihydropyridazinyl.

[0520] The group T3 may be furyl, thienyl, 1H-pyrrolyl, thiolyl or borocyclopentadienyl.

[0521] The group T4 can be 2H-pyrrolyl, 3H-pyrrolyl, imidazolyl, pyrazolyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, azathioyl, azaborolyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl or tetrazinyl.

[0522] As used herein, the terms "cyclic group", "C 3 -C 60 Carbocyclic group, "C 1 -C 60 Heterocyclic group", "π-electron-rich C 3 -C 60 Cyclic group" or "π-electron-deficient nitrogen-containing C 1 -C 60 The term "cyclic group" refers to a monovalent or polyvalent group (eg, a divalent group, a trivalent group, a tetravalent group, etc.) fused to (eg, bonded together with) a cyclic group, depending on the structure of the formula using the corresponding term.

[0523] For example, "phenyl" may be benzo, phenyl and / or phenylene, etc., which can be easily understood by a person of ordinary skill in the art based on the structure of the formula including "phenyl".

[0524] Unit Price C 3 -C 60 Carbocyclic groups and monovalent C 1 -C 60 An example of a heterocyclic group is C 3 -C 10 Cycloalkyl, C 1 -C 10 Heterocycloalkyl, C 3 -C 10 Cycloalkenyl, C 1 -C 10 Heterocycloalkenyl, C 6 -C 60 Aryl, C1 -C 60 heteroaryl, a monovalent non-aromatic fused polycyclic group, and a monovalent non-aromatic fused heteropolycyclic group.

[0525] Bivalent C 3 -C 60 Carbocyclic groups and divalent C 1 -C 60 An example of a heterocyclic group is C 3 -C 10 Cycloalkylene, C 1 -C 10 Heterocycloalkylene, C 3 -C 10 Cycloalkenylene, C 1 -C 10 Heterocycloalkenylene, C 6 -C 60 Arylene, C 1 -C 60 a heteroarylene group, a divalent non-aromatic fused polycyclic group, and a divalent non-aromatic fused heteropolycyclic group.

[0526] As used herein, the term "C 1 -C 60 The “alkyl group” refers to a linear or branched aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, and specific examples thereof are methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, n-hexyl, isohexyl, sec-hexyl, tert-hexyl, n-heptyl, isoheptyl, sec-heptyl, tert-heptyl, n-octyl, isooctyl, sec-octyl, tert-octyl, n-nonyl, isononyl, sec-nonyl, tert-nonyl, n-decyl, isodecyl, sec-decyl and tert-decyl.

[0527] As used herein, the term "C 1 -C 60 "Alkylene" refers to C 1 -C 60 The alkyl group has substantially the same structure as a divalent group.

[0528] As used herein, the term "C 2 -C 60 "Alkenyl" refers to 2 -C 60 The alkyl group is a monovalent hydrocarbon group having at least one carbon-carbon double bond in the middle or at the terminal, and examples thereof are ethenyl, propenyl, and butenyl.

[0529] As used herein, the term "C 2 -C 60 "Alkenylene" refers to C 2 -C 60The alkenyl group has a divalent group having substantially the same structure.

[0530] As used herein, the term "C 2 -C 60 "Alkynyl" refers to a C 2 -C 60 The alkyl group is a monovalent hydrocarbon group having at least one carbon-carbon triple bond in the middle or at the terminal, and examples thereof include ethynyl and / or propynyl, and the like.

[0531] As used herein, the term "C 2 -C 60 "Alkynylidene" refers to C 2 -C 60 Alkynyl groups have substantially the same structure as a divalent group.

[0532] As used herein, the term "C 1 -C 60 "Alkoxy" refers to -OA 101 (A 101 C 1 -C 60 An alkyl group is a monovalent group represented by an alkyl group, and examples thereof include a methoxy group, an ethoxy group, and an isopropoxy group.

[0533] As used herein, the term "C 3 -C 10 The term "cycloalkyl" refers to a monovalent saturated hydrocarbon ring group having 3 to 10 carbon atoms, and examples thereof are cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornyl (or bicyclo[2.2.1]heptyl), bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl and bicyclo[2.2.2]octyl.

[0534] As used herein, the term "C 3 -C 10 "Cycloalkylene" refers to 3 -C 10 The cycloalkyl group has a divalent group having substantially the same structure.

[0535] As used herein, the term "C 1 -C 10 The "heterocycloalkyl group" refers to a monovalent cyclic group of 1 to 10 carbon atoms further including at least one hetero atom as a ring-constituting atom in addition to carbon atoms, and specific examples are 1,2,3,4-oxatriazolidinyl, tetrahydrofuranyl and tetrahydrothienyl.

[0536] As used herein, the term "C 1 -C 10 "Heterocycloalkylene" refers to a C 1 -C 10The heterocycloalkyl group has substantially the same structure as a divalent group.

[0537] The term C used in this article 3 -C 10 The cycloalkenyl group refers to a monovalent cyclic group having 3 to 10 carbon atoms and at least one carbon-carbon double bond in its ring and having no aromaticity, and specific examples thereof are a cyclopentenyl group, a cyclohexenyl group, and a cycloheptenyl group.

[0538] As used herein, the term "C 3 -C 10 "Cycloalkenylene" refers to 3 -C 10 The cycloalkenyl group has a divalent group having substantially the same structure.

[0539] As used herein, the term "C 1 -C 10 The term "heterocycloalkenyl group" refers to a monovalent cyclic group of 1 to 10 carbon atoms which further includes at least one heteroatom as a ring-forming atom in addition to carbon atoms and has at least one double bond in its ring structure. 1 -C 10 Examples of the heterocycloalkenyl group include 4,5-dihydro-1,2,3,4-oxatriazolyl, 2,3-dihydrofuranyl, and 2,3-dihydrothienyl.

[0540] As used herein, the term "C 1 -C 10 "Heterocycloalkenylene" refers to a C 1 -C 10 The heterocycloalkenyl group has a divalent group having substantially the same structure.

[0541] As used herein, the term "C 6 -C 60 "Aryl" refers to a monovalent radical of a carbocyclic aromatic system having 6 to 60 carbon atoms.

[0542] As used herein, the term "C 6 -C 60 "Arylene" refers to a divalent radical of a carbocyclic aromatic system having 6 to 60 carbon atoms.

[0543] C 6 -C 60 Examples of aryl groups are phenyl, pentalenyl, naphthyl, azulenyl, indacenyl, acenaphthenyl, phenaltenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylene, pyrenyl, 1,2-triphenylenyl, perylenyl, pentaphenanthrenyl, heptalenyl, tetracenyl, phenanthrenyl, hexacecenyl, pentacecenyl, rubenyl, coronenyl and ovacenyl.

[0544] When C 6 -C 60Aryl and C 6 -C 60 When the arylene groups each include two or more rings, the respective rings may be fused to each other.

[0545] As used herein, the term "C 1 -C 60 The "heteroaryl group" refers to a monovalent group of a heterocyclic aromatic system having 1 to 60 carbon atoms, further including at least one heteroatom as a ring-constituting atom in addition to carbon atoms.

[0546] As used herein, the term "C 1 -C 60 The "heteroarylene group" refers to a divalent group of a heterocyclic aromatic system having 1 to 60 carbon atoms and further including at least one heteroatom as a ring-constituting atom in addition to carbon atoms.

[0547] C 1 -C 60 Examples of heteroaryl groups are pyridinyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolyl, benzoquinolyl, isoquinolyl, benzoisoquinolyl, quinoxalinyl, benzoquinoxalinyl, quinazolinyl, benzoquinazolinyl, cinnolinyl, phenanthrolinyl, phthalazinyl and naphthyridinyl.

[0548] When C 1 -C 60 Heteroaryl and C 1 -C 60 When the heteroarylene groups each include two or more rings, the rings may be fused to each other.

[0549] As used herein, the term "monovalent non-aromatic fused polycyclic group" refers to a monovalent group (e.g., having 8 to 60 carbon atoms) having two or more rings fused to each other, only carbon atoms as ring-forming atoms, and no aromaticity in its entire molecular structure. Examples of the monovalent non-aromatic fused polycyclic group are indenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, indenophenanthryl, and indenoanthryl.

[0550] The term "divalent non-aromatic condensed polycyclic group" as used herein refers to a divalent group having substantially the same structure as the above-mentioned monovalent non-aromatic condensed polycyclic group.

[0551] The term “monovalent non-aromatic fused heteropolycyclic group” as used herein refers to a monovalent group (for example, having 1 to 60 carbon atoms) having two or more rings fused to each other, further including at least one heteroatom as a ring-constituting atom in addition to carbon atoms, and having non-aromaticity in its entire molecular structure. Examples of the monovalent non-aromatic condensed heteropolycyclic group may include pyrrolyl, thienyl, furanyl, indolyl, benzindolyl, naphthoindolyl, isoindolyl, benzisoindolyl, naphthoisoindolyl, benzothioyl, benzothiophenyl, benzofuranyl, carbazolyl, dibenzothioyl, dibenzothiophenyl, dibenzofuranyl, azacarbazolyl, azafluorenyl, azadibenzothioyl, azadibenzothiophenyl, azadibenzofuranyl, pyrazolyl, imidazolyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, oxadiazolyl, thiadiazolyl , benzopyrazolyl, benzimidazolyl, benzoxazolyl, benzothiazolyl, benzoxadiazolyl, benzothiadiazolyl, imidazopyridinyl, imidazopyrimidinyl, imidazotriazine, imidazopyrazinyl, imidazopyridazinyl, indenocarbazolyl, indolecarbazolyl, benzofuranocarbazolyl, benzothiophenocarbazolyl, benzothiorrolocarbazolyl, benzoindolecarbazolyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophene, benzonaphthothiorryl, benzofuranodibenzofuranyl, benzofuranodibenzothiophene and benzothiophenodibenzothiophene.

[0552] The term "divalent non-aromatic fused heteropolycyclic group" as used herein refers to a divalent group having substantially the same structure as the above-mentioned monovalent non-aromatic fused heteropolycyclic group.

[0553] As used herein, the term "C 6 -C 60 Aryloxy" indicates -OA 102 (A 102 C 6 -C 60 aryl).

[0554] As used herein, the term "C 6 -C 60 Arylthio" indicates -SA 103 (A 103 C 6 -C 60 aryl).

[0555] As used herein, the term "C 7 -C 60 "Aralkyl" refers to -A 104 A 105 (A 104 C 1 -C 54 Alkylene, and A105 C 6 -C 59 aryl).

[0556] As used herein, the term "C 2 -C 60 "Heteroaralkyl" refers to -A 106 A 107 (A 106 C 1 -C 59 Alkylene, and A 107 C 1 -C 59 heteroaryl).

[0557] As used herein, the term " 10a "refer to:

[0558] deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro;

[0559] Each unsubstituted or substituted C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl or C 1 -C 60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O) 2 (Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof;

[0560] Each unsubstituted or substituted C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy, C 6 -C 60 Arylthio, C 7 -C 60 Aralkyl, C 2 -C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O) 2 (Q 21 )、-P(=O)(Q 21 )(Q 22 ) or a combination thereof; or

[0561] -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31) or -P(=O)(Q 31 )(Q 32 ).

[0562] In the manual, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 may be independently: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; or each unsubstituted or substituted by the following C 1 -C 60 Alkyl, C 2 -C 60 Alkenyl, C 2 -C 60 Alkynyl, C 1 -C 60 Alkoxy, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 7 -C 60 Arylalkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, cyano, C 1 -C 60 Alkyl, C 1 -C 60 Alkoxy, phenyl, biphenyl or a combination thereof.

[0563] As used herein, the term "heteroatom" refers to any atom other than a carbon atom and a hydrogen atom. Examples of heteroatoms are O, S, N, P, Si, B, Ge, Se, and any combination thereof.

[0564] The term “transition metal” used herein includes hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum (Pt) and / or gold (Au), etc.

[0565] Throughout the specification, "D" means deuterium, "Ph" means phenyl, "Me" means methyl, "Et" means ethyl, "tert-Bu", t Bu" or "Bu t ” each represents a tert-butyl group, and “OMe” represents a methoxy group.

[0566] As used herein, the term "biphenyl" refers to a "phenyl group substituted by a phenyl group". In other words, a "biphenyl group" is a group having C 6 -C 60 A phenyl group substituted with an aryl group as a substituent.

[0567] The term "terphenyl" as used herein refers to a "phenyl group substituted by a biphenyl group". "Terphenyl" may belong to i) "substituted phenyl groups", which are "phenyl groups in which the substituents are replaced by C 6 -C 60 Aryl substituted C 6 -C 60 aryl", or ii) a "substituted phenyl" having two substituents, each of which is "C 6 -C 60 Aryl".

[0568] As used herein, * and *', unless otherwise defined, each refers to a binding site to an adjacent atom in the corresponding formula or moiety.

[0569] In the specification, the x-axis, y-axis, and z-axis are not limited to the three axes in the orthogonal coordinate system, and can be interpreted in a broad sense including these axes. For example, the x-axis, y-axis, and z-axis can refer to those that are orthogonal to each other, or can refer to those that are not orthogonal to each other in different directions.

[0570] Hereinafter, compounds according to some embodiments and light emitting devices according to some embodiments will be described in more detail with reference to the following Examples and Comparative Examples.

[0571] Comparative Example 1

[0572] As the anode (first electrode), Corning 15Ω / cm 2 The ITO glass substrate was cut into a size of about 50 mm×about 50 mm×about 0.7 mm, ultrasonicated with isopropyl alcohol and pure water for about 15 minutes each, and then cleaned by exposure to ultraviolet rays and ozone for about 30 minutes. The ITO glass substrate was loaded onto a vacuum deposition apparatus.

[0573] HAT-CN was vacuum deposited on the anode to form a NPB was vacuum deposited on the hole injection layer to form a hole injection layer having a thickness of about TCTA was vacuum deposited on the first hole transport layer to form a first hole transport layer having a thickness of about The thickness of the first electron blocking layer is .

[0574] Compound BH1 and compound FD38 are co-deposited on the first electron blocking layer at a weight ratio of about 99:1 to form a The 2-1 emission layer is formed into a 2-1 emission layer having a thickness of about 1000 Å, and the compound BH2 and the compound FD38 are co-deposited on the 2-1 emission layer at a weight ratio of about 99:1 to form a 2-1 emission layer having a thickness of about 1000 Å. The thickness of the emission layer is 2-2, thereby forming a second emission layer.

[0575] Subsequently, T2T is vacuum deposited on the second emission layer to form a TPM-TAZ and Liq are co-doped on the first hole blocking layer at a weight ratio of about 5:5 to form a first hole blocking layer having a thickness of about The thickness of the first electron transport layer is .

[0576] The compound BCP and Li are co-deposited on the first electron transport layer in a weight ratio of about 9:1 to form a 1n charge generation layer, and HAT-CN is vacuum deposited on the 1n charge generation layer to form a 1n charge generation layer having a weight ratio of about 1:1. A charge generation layer with a thickness of 1p is formed, thereby forming a first charge generation layer.

[0577] NPB was vacuum deposited on the first charge generation layer to form a TCTA was vacuum deposited on the second hole transport layer to form a second hole transport layer having a thickness of about The second electron blocking layer has a thickness of .

[0578] Compound BH1 and compound FD38 are co-deposited on the second electron blocking layer at a weight ratio of about 99:1 to form a The 3-1 emission layer is formed into a 3-1 emission layer having a thickness of about 1000 Å, and the compound BH2 and the compound FD38 are co-deposited on the 3-1 emission layer at a weight ratio of about 99:1 to form a 3-1 emission layer having a thickness of about 1000 Å. The thickness of the emission layer is 3-2, thereby forming a third emission layer.

[0579] Subsequently, T2T is vacuum deposited on the third emission layer to form a TPM-TAZ and Liq are co-doped on the second hole blocking layer at a weight ratio of about 5:5 to form a second hole blocking layer having a thickness of about The thickness of the second electron transport layer is 200 Å.

[0580] The compound BCP and Li were co-deposited on the second electron transport layer in a weight ratio of about 9:1 to form a 2n charge generation layer, and HAT-CN was vacuum deposited on the 2n charge generation layer to form a 2n charge generation layer having a weight ratio of about 1:1. A 2p charge generation layer with a thickness of , thereby forming a second charge generation layer.

[0581] NPB was vacuum deposited on the second charge generation layer to form a TCTA was vacuum deposited on the third hole transport layer to form a third hole transport layer having a thickness of about The thickness of the third electron blocking layer is 1000 Å.

[0582] Compound BH1 and compound FD38 are co-deposited on the third electron blocking layer at a weight ratio of about 99:1 to form a The 4-1 emission layer is formed into a 4-1 emission layer having a thickness of about 1000 Å, and the compound BH2 and the compound FD38 are co-deposited on the 4-1 emission layer at a weight ratio of about 99:1 to form a 4-1 emission layer having a thickness of about 1000 Å. The thickness of the emission layer is 4-2, thereby forming a fourth emission layer.

[0583] Subsequently, T2T is vacuum deposited on the fourth emission layer to form a TPM-TAZ and Liq were co-deposited on the third hole blocking layer at a weight ratio of about 5:5 to form a third hole blocking layer having a thickness of about The thickness of the third electron transport layer is 200 Å.

[0584] The compound BCP and Li were co-deposited on the third electron transport layer at a weight ratio of about 9:1 to form a 3n charge generation layer, and HAT-CN was vacuum deposited on the 3n charge generation layer to form a 3n charge generation layer having a weight ratio of about 1:1. A 3p charge generation layer with a thickness of , thereby forming a third charge generation layer.

[0585] NPB was vacuum deposited on the third charge generation layer to form a The fourth hole transport layer has a thickness of 500 Å.

[0586] Compound HH1 (hole transport host), compound EH4 (electron transport host) and compound PD13 (phosphorescent dopant) are co-deposited on the fourth hole transport layer to form a layer having a thickness of about A first emission layer with a thickness of , wherein the weight ratio between compound HH1 and compound EH4 is about 1:1, and the amount of compound PD13 in the first emission layer is about 9 wt %.

[0587] TPM-TAZ and Liq were co-deposited on the first emission layer at a weight ratio of about 5:5 to form a Yb is vacuum deposited on the fourth electron transport layer to form a fourth electron transport layer having a thickness of about The electron injection layer has a thickness of .

[0588] AgMg was vacuum deposited on the electron injection layer to form a The CPL is vacuum deposited on the cathode to form a cathode having a thickness of about A capping layer of a thickness of , thereby completing the manufacture of the light-emitting device:

[0589]

[0590]

[0591]

[0592] Comparative Example 2

[0593] A light emitting device was manufactured in substantially the same manner as in Comparative Example 1, except that 3TPYMB (a low refractive index host) was used instead of TPM-TAZ when forming the fourth electron transport layer.

[0594] Comparative Example 3

[0595] A light emitting device was manufactured in substantially the same manner as in Comparative Example 1, except that 3TPYMB (a low refractive index host), compound BH2, and compound FD38 were co-deposited when forming the 2-2 emission layer. The weight ratio between 3TPYMB and compound BH2 was about 1:1, and the amount of compound FD38 in the 2-2 emission layer was about 1 wt%.

[0596] Comparative Example 4

[0597] A light emitting device was manufactured in substantially the same manner as in Comparative Example 1, except that 3TPYMB (low refractive index host), compound BH2, and compound FD38 were co-deposited when forming the 3-2 emission layer. The weight ratio between 3TPYMB and compound BH2 was about 1:1, and the amount of compound FD38 in the 3-2 emission layer was about 1 wt%.

[0598] Comparative Example 5

[0599] A light emitting device was manufactured in substantially the same manner as in Comparative Example 1, except that 3TPYMB (low refractive index host), compound BH2, and compound FD38 were co-deposited when forming the 4-2 emission layer. The weight ratio between 3TPYMB and compound BH2 was about 1:1, and the amount of compound FD38 in the 4-2 emission layer was about 1 wt%.

[0600] Example 1

[0601] A light-emitting device was manufactured in substantially the same manner as in Comparative Example 1, except that when the first emission layer was formed, compound HH1 (hole transport host), compound EH4 (electron transport host) and compound PD13 (phosphorescent dopant) were co-deposited on the fourth hole transport layer to form a layer with a thickness of 100 nm. 1a emission layer (the weight ratio between compound HH1 and compound EH4 is about 1:1, and the amount of compound PD13 in the 1a emission layer is about 9 wt%), and 3TPYMB (low refractive index host), compound HH1 (hole transport host), compound EH4 (electron transport host) and compound PD13 (phosphorescent dopant) are co-deposited on the 1a emission layer to form a layer with a thickness of 1b emission layer (the weight ratio of 3TPYMB, compound HH1 and compound EH4 is about 1:0.5:0.5, and the amount of compound PD13 in the 1b emission layer is about 9 wt %).

[0602]

[0603] Example 2

[0604] A light emitting device was manufactured in substantially the same manner as in Example 1, except that the thickness of the emission layer 1a was about And the thickness of the 1b emission layer is about

[0605] Example 3

[0606] A light emitting device was manufactured in substantially the same manner as in Example 1, except that the thickness of the emission layer 1a was about And the thickness of the 1b emission layer is about

[0607] Evaluation Example 1

[0608] In order to evaluate the characteristics of the light emitting device manufactured in each of Comparative Examples 1 to 5 and Examples 1 to 3, the light emitting diodes at about 1,500 cd / m 2 The driving voltage and the luminous efficiency (cd / A) at (nit) were measured, and the results are shown in Table 1. The values ​​of the luminous efficiency and the driving voltage are each indicated based on the value of Comparative Example 1 (100%).

[0609] Table 1

[0610]

[0611] As can be seen from Table 1, Comparative Example 2 shows improved luminous efficiency compared to Comparative Example 1; however, the improvement is not significant. Compared to Comparative Examples 1 to 5, Examples 1 to 3 show improved luminous efficiency and driving voltage.

[0612] In some embodiments, even with a low refractive index host, the light-emitting devices of Comparative Examples 3 to 5 have lower luminous efficiency and higher driving voltage than the light-emitting device of Comparative Example 1 without a low refractive index host. This can be interpreted as meaning that in the case of a blue emission layer, electrical properties contribute more to luminous efficiency and driving voltage than optical properties.

[0613] Accordingly, when a low refractive index host is employed and the low refractive index host is employed in the 1b emission layer adjacent to the electron transport region, both luminous efficiency and driving voltage may be improved (eg, luminous efficiency and driving voltage may be improved simultaneously).

[0614] By including a low-refractive index host having a low refractive index in an emission layer adjacent to an electron transport zone of a light-emitting device, the light-emitting device can have improved luminous efficiency and driving voltage compared to i) a light-emitting device not including a low-refractive index host, ii) a light-emitting device including a low-refractive index host in the electron transport zone, and iii) a light-emitting device including a low-refractive index host in an emission layer not adjacent to the electron transport zone.

[0615] The light-emitting device, display device, electronic device, electronic equipment or any other related device or component according to the embodiments of the present disclosure described herein may be implemented using any appropriate hardware, firmware (e.g., a dedicated integrated circuit), software or a combination of software, firmware and hardware. For example, the various components of the device may be formed on an integrated circuit (IC) chip or on separate IC chips. Further, the various components of the device may be implemented on a flexible printed circuit film, a tape carrier package (TCP) or a printed circuit board (PCB), or formed on a substrate. Further, the various components of the device may be processes or threads that run on one or more processors in one or more computing devices, execute computer program instructions and interact with other system components to perform the various functions described herein. The computer program instructions are stored in a memory, which may be implemented in a computing device using a standard storage device, such as, for example, a random access memory (RAM). The computer program instructions may also be stored in other non-temporary computer-readable media, such as, for example, a CD-ROM or a flash drive, etc. Moreover, those skilled in the art should recognize that, without departing from the scope of the embodiments of the present disclosure, the functions of various computing devices may be combined or integrated into a single computing device, or the functions of a dedicated computing device may be distributed on one or more other computing devices.

[0616] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for limiting purposes. The description of features or aspects in each embodiment should generally be considered to be applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those of ordinary skill in the art that one or more appropriate changes in form and details may be made therein without departing from the spirit and scope defined by the claims and their equivalents.

Claims

1. A light emitting device, comprising: a first electrode; a second electrode opposite to the first electrode; as well as an interlayer disposed between the first electrode and the second electrode, The interlayer comprises: a first emission layer; and an electron transport region between the first emission layer and the second electrode, The first emission layer comprises: 1a emission layer; and an emission layer 1b between the emission layer 1a and the electron transport region, and The 1b emission layer includes a low refractive index host having a refractive index of 1.8 or less. The light emitting device according to claim 1 , wherein the 1b emission layer is in contact with the 1a emission layer. The light emitting device according to claim 1 , wherein the 1b emission layer is in contact with the electron transport region.

4. The light emitting device according to claim 1, wherein the low refractive index host is represented by Formula 1: Formula 1 and in, In formula 1, L1 to L3 are each independently unsubstituted or substituted with at least one R 10a Substituted C3-C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heterocyclic group, a1 to a3 are each independently an integer selected from 0 to 3, and R1 to R3 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted by at least one R 10a Substituted C1-C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C2-C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C2-C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C3-C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 heterocyclic group, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2), R 10a for: deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; Each unsubstituted or substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl or C1-C 60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Aralkyl, C2-C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof; Each unsubstituted or substituted C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Aralkyl, C2-C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2(Q 21 )、-P(=O)(Q 21 )(Q 22 ) or any combination thereof; or -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 ) or -P(=O)(Q 31 )(Q 32 ),and Q1 to Q3, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 Each independently is: hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, or nitro; or Each unsubstituted or substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl: deuterium, -F, cyano, C1-C 60 Alkyl, C1-C 60 Alkoxy, phenyl, biphenyl or a combination thereof.

5. The light-emitting device according to claim 1, wherein the first emission layer comprises a hole transport host represented by Formula 301-1 or Formula 301-2: Formula 301-1 Formula 301-2 In Formula 301-1 and Formula 301-2, Ring A 301 To Ring A 304 Each independently is C3-C 60 Carbocyclic or C1-C 60 Heterocyclic group, X 301 is O, S, N[(L 304 ) xb4 -R 304 , C(R 304 )(R 305 ), or Si(R 304 )(R 305 ), xb22 and xb23 are each independently 0, 1 or 2, L 301 To L 304 are each independently unsubstituted or substituted with at least one R 10a Substituted C3-C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heterocyclic group, xb1 to xb4 are each independently an integer selected from 0 to 5, R 301 To R 305 and R 311 To R 314 Each is independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or replaced by at least one R 10a Substituted C1-C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C2-C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C2-C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C3-C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heterocyclic group, -Si(Q 301 )(Q 302 )(Q 303 )、-N(Q 301 )(Q 302 )、-B(Q 301 )(Q 302 )、-C(=O)(Q 301 )、-S(=O)2(Q 301 ) or -P(=O)(Q 301 )(Q 302 ), R 10a for: deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; Each unsubstituted or substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl or C1-C 60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Aralkyl, C2-C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof; Each unsubstituted or substituted C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Aralkyl, C2-C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2(Q 21 )、-P(=O)(Q 21 )(Q 22 ) or a combination thereof; or -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 ) or -P(=O)(Q 31 )(Q 32 ), and Q 11 To Q 13 , Q 21 To Q 23 , Q 31 To Q 33 and Q 301 To Q 303 Each independently is: hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; or Each unsubstituted or substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl: deuterium, -F, cyano, C1-C 60 Alkyl, C1-C 60 Alkoxy, phenyl, biphenyl or a combination thereof. The light emitting device according to claim 5 , wherein the 1b emission layer includes the hole transport host, and an amount of the low refractive index host included in the 1b emission layer is greater than an amount of the hole transport host included in the 1b emission layer.

7. The light-emitting device according to claim 1, wherein the first emission layer comprises an electron transport host represented by Formula 310: Formula 310 and in, In formula 310, X 311 To X 313 Each independently is N or C[(L 314 ) xb314 -R 314 ], L 311 To L 314 are each independently unsubstituted or substituted with at least one R 10a Substituted C3-C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heterocyclic group, xb311 to xb314 are each independently an integer selected from 0 to 5, and R 311 To R 314 Each is independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or replaced by at least one R 10a Substituted C1-C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C2-C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C2-C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C3-C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heterocyclic group, -Si(Q 311 )(Q 312 )(Q 313 )、-N(Q 311 )(Q 312 )、-B(Q 311 )(Q 312 )、-C(=O)(Q 311 )、-S(=O)2(Q 311 ) or -P(=O)(Q 311 )(Q 312 ), R 10a for: deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; Each unsubstituted or substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl or C1-C 60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Aralkyl, C2-C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof; each unsubstituted or substituted C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Aralkyl, C2-C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2(Q 21 )、-P(=O)(Q 21 )(Q 22 ) or a combination thereof; or -Si(Q 31 )(Q 32 )(Q 33 ), -N(Q 31 )(Q 32 ), -B(Q 31 )(Q 32 ), -C(=O)(Q 31 ), -S(=O)2(Q 31 ) or -P(=O)(Q 31 )(Q 32 ),and Q 11 To Q 13 , Q 21 To Q 23 , Q 31 To Q 33 and Q 311 To Q 313 Each independently is: hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; or Each unsubstituted or substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl: deuterium, -F, cyano, C1-C 60 Alkyl, C1-C 60 Alkoxy, phenyl, biphenyl or a combination thereof. 8 . The light emitting device according to claim 7 , wherein the 1b emission layer includes the electron transport host, and an amount of the low refractive index host included in the 1b emission layer is greater than an amount of the electron transport host included in the 1b emission layer. 9 . The light emitting device according to claim 1 , wherein the first emission layer is an emission layer configured to emit light having a maximum emission wavelength of 490 nm to 580 nm.

10. The light emitting device according to claim 1, wherein the first emission layer comprises a first dopant represented by Formula 401: Formula 401 M(L 401 ) xc1 (L 402 ) xc2 Formula 402 and in, In equations 401 and 402, M is iridium, platinum, palladium, osmium, titanium, gold, hafnium, europium, terbium, rhodium, rhenium or thulium, L 401 is a ligand represented by formula 402, xc1 is 1, 2 or 3. When xc1 is 2 or greater, two or more L 401 Same or different from each other, L 402 For organic ligands, xc2 is 0, 1, 2, 3 or 4. When xc2 is 2 or greater, two or more L 402 Same or different from each other, X 401 and X 402 are each independently nitrogen or carbon, Ring A 401 and Ring A 402 Each independently is C3-C 60 Carbocyclic or C1-C 60 Heterocyclic group, T 401 is 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=*', X 403 and X 404 Each independently represents a single bond, O, S, N(Q 413 )、B(Q 413 )、P(Q 413 )、C(Q 413 )(Q 414 ) or Si(Q 413 )(Q 414 ), R 401 and R 402 Each is independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or replaced by at least one R 10a Substituted C1-C 20 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C1-C 20 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C3-C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heterocyclic 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 ) or -P(=O)(Q 401 )(Q 402 ),and xc11 and xc12 are each independently an integer selected from 0 to 10, R 10a for: deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; Each unsubstituted or substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl or C1-C 60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Aralkyl, C2-C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof; Each unsubstituted or substituted C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Aralkyl, C2-C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2(Q 21 )、-P(=O)(Q 21 )(Q 22 ) or a combination thereof; or -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 ) or -P(=O)(Q 31 )(Q 32 ), and Q 11 To Q 13 , Q 21 To Q 23 , Q 31 To Q 33 , Q 401 To Q 403 and Q 411 To Q 414 Each independently is: hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; or Each unsubstituted or substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl: deuterium, -F, cyano, C1-C 60 Alkyl, C1-C 60 alkoxy, phenyl, biphenyl or a combination thereof, and * and *' in Formula 402 each indicate a binding site with M in Formula 401. The light emitting device according to claim 1 , wherein the interlayer further comprises a second emission layer between the first electrode and the 1a emission layer. 12 . The light emitting device according to claim 11 , wherein the second emission layer is an emission layer configured to emit light having a maximum emission wavelength of 450 nm to 490 nm.

13. The light emitting device according to claim 11, wherein the second emission layer comprises a second dopant represented by Formula 501: Formula 501 and in, In formula 501, Ar 501 is unsubstituted or substituted with at least one R 10a Substituted C3-C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heterocyclic group, L 501 To L 503 are each independently unsubstituted or substituted with at least one R 10a Substituted C3-C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heterocyclic group, xd1 to xd3 are each independently an integer selected from 0 to 3, xd4 is an integer selected from 1 to 6, and R 501 and R 502 Each is independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or replaced by at least one R 10a Substituted C1-C 60 Alkyl, unsubstituted or substituted with at least one R 10a Substituted C2-C 60 Alkenyl, unsubstituted or substituted with at least one R 10a Substituted C2-C 60 Alkynyl, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Alkoxy, unsubstituted or substituted with at least one R 10a Substituted C3-C 60 Carbocyclic group, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heterocyclic group, -Si(Q 501 )(Q 502 )(Q 503 )、-N(Q 501 )(Q 502 )、-B(Q 501 )(Q 502 )、-C(=O)(Q 501 )、-S(=O)2(Q 501 ) or -P(=O)(Q 501 )(Q 502 ), R 10a for: deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; Each unsubstituted or substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl or C1-C 60 Alkoxy: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Aralkyl, C2-C 60 Heteroaralkyl, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 )、-P(=O)(Q 11 )(Q 12 ) or a combination thereof; Each unsubstituted or substituted C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C6-C 60 Aryloxy, C6-C 60 Arylthio, C7-C 60 Aralkyl, C2-C 60 Heteroaralkyl, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2(Q 21 )、-P(=O)(Q 21 )(Q 22 ) or a combination thereof; or -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 ) or -P(=O)(Q 31 )(Q 32 ), and Q 11 To Q 13 , Q 21 To Q 23 , Q 31 To Q 33 and Q 501 To Q 503 Each independently is: hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro; or Each unsubstituted or substituted C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 60 Carbocyclic group, C1-C 60 Heterocyclic group, C7-C 60 Arylalkyl or C2-C 60 Heteroaralkyl: deuterium, -F, cyano, C1-C 60 Alkyl, C1-C 60 Alkoxy, phenyl, biphenyl or a combination thereof.

14. The light emitting device according to claim 11, wherein the interlayer further comprises: a third emission layer between the second emission layer and the 1a emission layer; as well as a fourth emission layer between the third emission layer and the 1a emission layer, and The interlayer satisfies at least one selected from conditions 1 to 3: Condition 1 The second emission layer includes a 2-1 emission layer and a 2-2 emission layer between the 2-1 emission layer and the third emission layer; Condition 2 The third emission layer includes a 3-1 emission layer and a 3-2 emission layer between the 3-1 emission layer and the fourth emission layer; as well as Condition 3 The fourth emission layer includes a 4-1 emission layer and a 4-2 emission layer between the 4-1 emission layer and the 1a emission layer. 15 . The light emitting device of claim 14 , wherein the low refractive index body is not included in each of the 2-2 emission layer, the 3-2 emission layer, and the 4-2 emission layer.

16. The light emitting device according to claim 14, wherein the first emission layer comprises a first dopant, Each of the second emission layer, the third emission layer, and the fourth emission layer includes a second dopant, and The first dopant and the second dopant are different from each other.

17. An electronic device comprising: The light emitting device according to any one of claims 1 to 16; as well as A thin film transistor is electrically connected to the light emitting device.

18. The electronic device of claim 17, further comprising a color filter, a color conversion layer, or a combination thereof.

19. The electronic device of claim 18, wherein at least one of the color filter and the color conversion layer comprises quantum dots.

20. An electronic device comprising a light emitting device according to any one of claims 1 to 16, wherein the electronic device comprises one selected from a flat panel display, a curved display, a computer monitor, a medical monitor, a television, a billboard, an indoor light, an outdoor light, a signal light, a head-up display, a fully transparent or partially transparent display, a flexible display, a rollable display, a foldable display, a retractable display, a laser printer, a phone, a mobile phone, a tablet personal computer, a tablet phone, a personal digital assistant, a wearable device, a laptop computer, a digital camera, a video camera, a viewfinder, a microdisplay, a three-dimensional display, a virtual reality or augmented reality display, a vehicle, a video wall comprising multiple displays stitched together, a theater or stadium screen, a light therapy device, a sign, and a combination thereof.

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