Light emitting device and electronic apparatus including same

Abstract

Embodiments provide a light emitting device and an electronic device including the same. The light emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode, wherein the interlayer includes an emission layer. The emissive layer includes a host, a first dopant, and a second dopant, where a weight percentage of the first dopant is greater than a weight percentage of the second dopant, and the weight percentage of the first dopant increases from an interface of the emissive layer toward a center of the emissive layer.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority and benefit of Korean Patent Application No. 10 - 2023 - 0176802, filed with the Korean Intellectual Property Office on December 7, 2023, the entire content of which is incorporated herein by reference. Technical field

[0003] Embodiments relate to a light - emitting device and an electronic device including the same. Background art

[0004] A light - emitting device is a self - emitting device, and compared with devices in related fields, the light - emitting device has a wide viewing angle, high contrast, short response time, and excellent characteristics in terms of brightness, driving voltage, and response speed.

[0005] In a light - emitting device, a first electrode may be located on a substrate, and a hole - transport region, an emission layer, an electron - transport region, and a second electrode may be sequentially formed on the first electrode. Holes provided from the first electrode move through the hole - transport region toward the emission layer, and electrons provided from the second electrode move through the electron - transport region toward the emission layer. Carriers (such as holes and electrons) recombine in the emission layer to generate light.

[0006] It is to be understood that this background art section is intended to partly provide useful background for understanding the technology. However, this background art section may also include ideas, concepts, or cognitions that were not known or understood by those skilled in the relevant art before the corresponding effective filing date of the subject matter disclosed herein. Summary of the invention

[0007] Embodiments include a light - emitting device that shows improved efficiency and lifetime even when the deposition profile is changed.

[0008] Additional aspects will be partly set forth in the following description, and partly will be apparent from the description, or may be learned by practice of the embodiments of the present disclosure.

[0009] According to an embodiment, a light - emitting device may include a first electrode, a second electrode facing the first electrode, and a sandwich layer between the first electrode and the second electrode, wherein

[0010] the sandwich layer may include an emission layer; the emission layer may include a host, a first dopant, and a second dopant; the weight percentage (wt%) of the first dopant may be greater than the weight percentage of the second dopant; and the weight percentage of the first dopant may increase from the interface of the emission layer toward the center of the emission layer.

[0011] In an embodiment, the first electrode may be an anode; the second electrode may be a cathode; the interlayer may further include: a hole transport region between the first electrode and the emission layer or an electron transport region between the second electrode and the emission layer; the hole transport region may include a hole injection layer, a hole transport layer, an electron blocking layer, or any combination thereof; and the electron transport region may include an electron transport layer, an electron injection layer, a hole blocking layer, or any combination thereof.

[0012] In an embodiment, the weight percentage of the host and the weight percentage of the second dopant may each independently vary according to the thickness of the emission layer.

[0013] In an embodiment, the weight percentage of the second dopant may decrease from the interface of the emission layer towards the center of the emission layer.

[0014] In an embodiment, the first dopant may include a phosphorescent dopant.

[0015] In an embodiment, the second dopant may include a fluorescent dopant.

[0016] In an embodiment, the second dopant may include a delayed fluorescence dopant.

[0017] In an embodiment, the host may include an electron transport host and a hole transport host.

[0018] In an embodiment, the weight percentage of the hole transport host may be greater than the weight percentage of the electron transport host.

[0019] In an embodiment, the ratio of the weight percentage of the hole transport host to the weight percentage of the electron transport host may be in the range of about 9:1 to about 5.1:4.9.

[0020] In an embodiment, based on the total weight of the emission layer, the weight percentage of the first dopant may be in the range of about 3 wt% to about 20 wt%.

[0021] In an embodiment, based on the total weight of the emission layer, the weight percentage of the second dopant may be in the range of about 0.1 wt% to about 2 wt%.

[0022] In an embodiment, the hole transport host may include a compound represented by Formula 301-1, a compound represented by Formula 301-2, or any combination thereof, which is explained below.

[0023] In an embodiment, the electron transport host may include a compound represented by Formula 1, which is explained below.

[0024] In an embodiment, the first dopant may include an organometallic compound represented by Formula 401, which is explained below.

[0025] In an embodiment, the second dopant may include a compound represented by Formula 501, which is explained below.

[0026] In an embodiment, the second dopant may include a compound represented by Formula 2, which is explained below.

[0027] In an embodiment, the emission layer may emit blue light.

[0028] According to an embodiment, the electronic device may include a light-emitting device.

[0029] In an embodiment, the electronic device may further include a thin-film transistor, where the thin-film transistor may include a source electrode and a drain electrode, and a first electrode of the light-emitting device may be electrically connected to the source electrode or the drain electrode.

[0030] It is to be understood that the above embodiments are described only in a general and illustrative sense and not for the purpose of limitation, and the present disclosure is not limited to the above embodiments. Description of the Drawings

[0031] The accompanying drawings are included to provide a further understanding of the embodiments, and the accompanying drawings are incorporated in this specification and constitute a part of this specification. The drawings illustrate the embodiments of the present disclosure and their principles. The above and other aspects and features of the present disclosure will become more apparent by describing its embodiments in detail with reference to the accompanying drawings, in which:

[0032] Figure 1 is a schematic cross-sectional view of the structure of a light-emitting device according to an embodiment;

[0033] Figure 2 is a schematic cross-sectional view of an electronic device according to an embodiment;

[0034] Figure 3 is a schematic cross-sectional view of an electronic device according to another embodiment; and

[0035] Figures 4A to 4D are each a graph showing a change in the concentration of a compound included in an emission layer according to the thickness of the emission layer of a light-emitting device. Detailed Description of Embodiments

[0036] The present disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments are shown. However, the present disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0037] In the drawings, for ease of description and for clarity, the size, scale, and dimensions (e.g., thickness) of elements may be enlarged. The same reference numerals and / or reference characters refer to the same elements throughout.

[0038] In the description, it will be understood that when an element (or region, layer, portion, etc.) is referred to as being "on", "connected to", or "coupled to" another element (or region, layer, portion, etc.), it may be directly on the other element (or region, layer, portion, etc.), directly connected to, or directly coupled to the other element (or region, layer, portion, etc.), or there may be one or more intervening elements therebetween. In a similar sense, when an element (or region, layer, portion, etc.) is described as "covering" another element (or region, layer, portion, etc.), it may directly cover the other element (or region, layer, portion, etc.), or there may be one or more intervening elements therebetween.

[0039] In the description, when an element is "directly on", "directly connected to", or "directly coupled to" another element, there are no intervening elements. For example, "directly on" may mean that two layers or two elements are provided with no additional element (such as an adhesive element) therebetween.

[0040] As used herein, expressions used in the singular form, such as "a", "an", and "the", are intended to also include the plural forms unless the context clearly indicates otherwise.

[0041] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. For example, "A and / or B" may be understood to mean "A, B, or A and B". The terms "and" and "or" may be used in a conjunctive or disjunctive sense and may be understood to be equivalent to "and / or".

[0042] In the specification and claims, the term "at least one of..." is intended to include the meaning of "at least one selected from the group consisting of..." for purposes of its meaning and interpretation. For example, "at least one of A, B, and C" may be understood to mean only A, only B, only C, or any combination of two or more of A, B, and C, such as ABC, ACC, BC, or CC. When following a list of elements, the term "at least one of..." modifies the entire list of elements and not a single element of the list.

[0043] It will be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. Thus, a first element may be referred to as a second element without departing from the teachings of the present disclosure. Similarly, a second element may be referred to as a first element without departing from the scope of the present disclosure.

[0044] For ease of description, spatially relative terms, such as "below", "beneath", "under", "above", or "on" etc., may be used herein to describe the relationship between one element or component and another element or component as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, in the case of flipping the device illustrated in the figures, a device located "below" or "beneath" another device may be placed "above" the other device. Accordingly, the illustrative term "below" may include both a lower position and an upper position. The device may also be oriented in other directions and thus the spatially relative terms may be interpreted differently depending on the orientation.

[0045] As used herein, the term "about" or "approximately" includes the recited value and means within an acceptable deviation range of the recited value determined by a person of ordinary skill in the art considering the measurement in question and the errors associated with the measurement of the recited quantity (e.g., limitations of the measurement system). For example, "about" may mean within one or more standard deviations of the recited value, or within ±20%, ±10%, or ±5% of the recited value.

[0046] It should be understood that the terms "comprises", "comprising", "include", "including", "have", "having", "contains", and "containing" etc. are intended to indicate the presence of the recited features, integers, steps, operations, elements, components, or combinations thereof in the present disclosure, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

[0047] Unless otherwise defined or implied herein, all terms used (including technical and scientific terms) have the same meaning as commonly understood by a person of ordinary skill in the art to which this disclosure pertains. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless clearly defined in the specification.

[0048] According to an embodiment, the light-emitting device may include:

[0049] The first electrode;

[0050] A second electrode facing the first electrode; and

[0051] A sandwich layer between the first electrode and the second electrode, wherein

[0052] the sandwich layer may include an emission layer,

[0053] the emission layer may include a host, a first dopant, and a second dopant,

[0054] the weight percentage (wt%) of the first dopant may be greater than the weight percentage of the second dopant, and

[0055] the weight percentage of the first dopant may increase from the interface of the emission layer towards the center of the emission layer.

[0056] The weight percentage of the host, the weight percentage of the first dopant, and the weight percentage of the second dopant may add up to 100 wt%.

[0057] In the related art, since the compounds of the emission layer (e.g., the host and the dopant) are deposited on the substrate without scanning, the deposition distribution may not change, and the compounds may be deposited while maintaining a fixed ratio.

[0058] When the substrate is larger than a specific size, a process of scanning the substrate while evaporating the compounds from their material sources may be required to deposit the compounds.

[0059] Accordingly, the compounds may not maintain a fixed ratio according to the thickness of the layer during deposition, and the deposition distribution may change, resulting in deterioration of the device characteristics.

[0060] Even when the deposition distribution changes, the device characteristics of the light-emitting device according to the embodiment do not deteriorate.

[0061] In an embodiment, the first electrode may be an anode; the second electrode may be a cathode; the sandwich layer may further include a hole transport region between the first electrode and the emission layer or an electron transport region between the second electrode and the emission layer;

[0062] The hole transport layer may include a hole injection layer, a hole transport layer, an electron blocking layer, or any combination thereof; and

[0063] The electron transport region may include an electron transport layer, an electron injection layer, a hole blocking layer, or any combination thereof.

[0064] In an embodiment, the weight percentage of the host and the weight percentage of the second dopant may each independently change according to the thickness of the emission layer.

[0065] In an embodiment, the weight percentage of the second dopant may decrease from the interface of the emission layer towards the center of the emission layer.

[0066] In an embodiment, the first dopant may include a phosphorescent dopant.

[0067] In an embodiment, the second dopant may include a fluorescent dopant.

[0068] In an embodiment, the second dopant may include a delayed fluorescence dopant.

[0069] The host may be a single host, a bipolar host, or a hybrid host including an electron-transporting host and a hole-transporting host.

[0070] In an embodiment, the weight percentage of the bipolar host, the weight percentage of the electron-transporting host, and the weight percentage of the hole-transporting host may each independently vary according to the thickness of the emission layer.

[0071] In an embodiment, the weight percentage of the hole-transporting host may be greater than the weight percentage of the electron-transporting host. In an embodiment, the ratio of the weight percentage of the hole-transporting host to the weight percentage of the electron-transporting host may be in the range of about 9:1 to about 5.1:4.9.

[0072] In an embodiment, based on the total weight of the emission layer, the weight percentage of the first dopant may be in the range of about 3 wt% to about 20 wt%. For example, based on the total weight of the emission layer, the weight percentage of the first dopant may be in the range of about 5 wt% to about 20 wt%.

[0073] In an embodiment, based on the total weight of the emission layer, the weight percentage of the second dopant may be in the range of about 0.1 wt% to about 2 wt%. For example, based on the total weight of the emission layer, the weight percentage of the second dopant may be in the range of about 0.5 wt% to about 2 wt%.

[0074] The host and the dopant may be the host and the dopant as described herein.

[0075] According to an embodiment, the electronic device may include a light-emitting device.

[0076] In an embodiment, the electronic device may further include a thin-film transistor, wherein

[0077] The thin-film transistor may include a source electrode and a drain electrode, and

[0078] The first electrode of the light-emitting device may be electrically connected to the source electrode or the drain electrode.

[0079] In an embodiment, the electronic device may further include a color filter, a color conversion layer, a touch screen layer, a polarization layer, or any combination thereof.

[0080] As used herein, the term "interlayer" may be a single layer and / or multiple layers between a first electrode and a second electrode of a light-emitting device.

[0081] Figure 1 description of]

[0082] Figure 1 FIG. 10 is a schematic cross-sectional view of a light-emitting device 10 according to an embodiment. The light-emitting device 10 includes a first electrode 110, an interlayer 130, and a second electrode 150.

[0083] Hereinafter, the structure of the light-emitting device 10 according to an embodiment and a method of manufacturing the light-emitting device 10 will be described with reference to Figure 1 FIG. 10.

[0084] [First Electrode 110]

[0085] In Figure 1 FIG. 10, a substrate may be further included under the first electrode 110 or on the second electrode 150. In an embodiment, the substrate may be a glass substrate or a plastic substrate. In an embodiment, the substrate may be a flexible substrate and may include a plastic having excellent heat resistance and durability, such as polyimide, polyethylene terephthalate (PET), polycarbonate, polyethylene naphthalate, polyarylate (PAR), polyetherimide, or any combination thereof.

[0086] The first electrode 110 may be formed by depositing or sputtering a material for forming the first electrode 110 on the substrate, for example. 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 hole injection.

[0087] 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, the material for forming the first electrode 110 may include indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO 2 2), zinc oxide (ZnO), or any combination thereof. In an embodiment, when the first electrode 110 is a semi-transmissive electrode or a reflective electrode, the material for forming 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 any combination thereof.

[0088] The first electrode 110 may have a single-layer structure composed of a single layer or a multi-layer structure including multiple layers. For example, the first electrode 110 may have a three-layer structure of ITO / Ag / ITO.

[0089] [Interlayer 130]

[0090] ​The interlayer 130 may be located on the first electrode 110. The interlayer 130 may include an emission layer.

[0091] The interlayer 130 may further include a hole transport region between the first electrode 110 and the emission layer and an electron transport region between the emission layer and the second electrode 150.

[0092] In addition to various organic materials, the interlayer 130 may further include a metal-containing compound (such as an organometallic compound) or an inorganic material (such as a quantum dot), etc.

[0093] In an embodiment, the interlayer 130 may include two or more emission layers stacked between the first electrode 110 and the second electrode 150 and at least one charge generation layer between adjacent emission layers among the two or more emission layers. When the interlayer 130 includes two or more emission layers and at least one charge generation layer as described above, the light-emitting device 10 may be a tandem light-emitting device.

[0094] [Hole transport region in the interlayer 130]

[0095] The hole transport region may have a single-layer structure composed of a single layer (composed of a single material), a single-layer structure composed of a single layer containing different materials, or a multi-layer structure including multiple layers containing different materials.

[0096] The hole transport region may include a hole injection layer, a hole transport layer, an emission assist layer, an electron blocking layer, or any combination thereof.

[0097] In an embodiment, the hole transport region may have a multi-layer structure, which includes a hole injection layer / hole transport layer structure, a hole injection layer / hole transport layer / emission assist layer structure, a hole injection layer / emission assist layer structure, a hole transport layer / emission assist layer structure, or a hole injection layer / hole transport layer / electron blocking layer structure, where the layers of each structure may be stacked from the first electrode 110 in their respective recited order, but the structure of the hole transport region is not limited thereto.

[0098] The hole transport region may include a compound represented by Formula 201, a compound represented by Formula 202, or any combination thereof:

[0099] [Formula 201]

[0100]

[0101] [Formula 202]

[0102]

[0103] In Formula 201 and Formula 202,

[0104] L 201to L 204 may each independently be unsubstituted or substituted by at least one R 10a -substituted C 3 -C 60 -carbocyclic group or unsubstituted or substituted by at least one R 10a -substituted C 1 -C 60 -heterocyclic group,

[0105] L 205 may be *-O-*', *-S-*', *-N(Q 201 )-*', unsubstituted or substituted by at least one R 10a -substituted C 1 -C 20 -alkylene, unsubstituted or substituted by at least one R 10a -substituted C 2 -C 20 -alkenylene, unsubstituted or substituted by at least one R 10a -substituted C 3 -C 60 -carbocyclic group or unsubstituted or substituted by at least one R 10a -substituted C 1 -C 60 -heterocyclic group,

[0106] xa1 to xa4 may each independently be an integer selected from 0 to 5,

[0107] xa5 may be an integer selected from 1 to 10,

[0108] R 201 to R 204 and Q 201 may each independently be unsubstituted or substituted by at least one R 10a -substituted C 3 -C 60 -carbocyclic group or unsubstituted or substituted by at least one R 10a -substituted C 1 -C 60 -heterocyclic group,

[0109] R 201 and R 202 may optionally be joined to each other via a single bond, unsubstituted or substituted by at least one R 10a -substituted C 1 -C 5 -alkylene or unsubstituted or substituted by at least one R 10a -substituted C 2 -C 5 -alkenylene to form an unsubstituted or substituted by at least one R 10a -substituted C 8 -C 60Polycyclic groups (e.g., carbazolyl, etc.) (e.g., compound HT16),

[0110] R 203 and R 204 may optionally be connected to each other via a single bond, an unsubstituted or at least one R 10a substituted C 1 -C 5 alkylene group or an unsubstituted or at least one R 10a substituted C 2 -C 5 alkenylene group to form an unsubstituted or at least one R 10a substituted C 8 -C 60 polycyclic group, and

[0111] na1 may be an integer selected from 1 to 4.

[0112] In an embodiment, the compound represented by Formula 201 and the compound represented by Formula 202 may each independently include at least one of the groups represented by Formulae CY201 to CY217:

[0113]

[0114] In Formulae CY201 to CY217, R 10b and R 10c may each independently be the same as described with reference to R 10a , ring CY 201 to ring CY 204 may each independently be a C 3 -C 20 carbocyclic group or a C 1 -C 20 heterocyclic group, and at least one hydrogen in Formulae CY201 to CY217 may be unsubstituted or substituted with R 10a .

[0115] In an embodiment, in Formulae CY201 to CY217, ring CY 201 to ring CY 204 may each independently be phenyl, naphthyl, phenanthryl or anthracenyl.

[0116] In an embodiment, the compound represented by Formula 201 and the compound represented by Formula 202 may include at least one of the groups represented by Formulae CY201 to CY203.

[0117] In an embodiment, the compound represented by Formula 201 may include at least one of the groups represented by Formulae CY201 to CY203 and at least one of the groups represented by Formulae CY204 to CY217.

[0118] In an embodiment, in Formula 201, xa1 may be 1, and R 201 may be a group represented by one of Formula CY201 to Formula CY203, xa2 may be 0, and R 202 may be a group represented by one of Formula CY204 to Formula CY207.

[0119] In an embodiment, the compound represented by Formula 201 and the compound represented by Formula 202 may each not include a group represented by one of Formula CY201 to Formula CY203.

[0120] In an embodiment, the compound represented by Formula 201 and the compound represented by Formula 202 may each not include a group represented by one of Formula CY201 to Formula CY203, and may each independently include at least one of the groups represented by Formula CY204 to Formula CY217.

[0121] In an embodiment, the compound represented by Formula 201 and the compound represented by Formula 202 may each not include a group represented by one of Formula CY201 to Formula CY217.

[0122] In an embodiment, the hole transport region may include one of Compounds HT1 to HT46, m-MTDATA, TDATA, 2-TNATA, NPB (NPD), β-NPB, TPD, spiro-TPD, spiro-NPB, methylated NPB, TAPC, HMTPD, 4,4',4”-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / camphorsulfonic acid (PANI / CSA), polyaniline / poly(4-styrenesulfonate) (PANI / PSS), or any combination thereof:

[0123]

[0124]

[0125]

[0126]

[0127]

[0128] The thickness of the hole transport region may be in the range of about to about For example, the thickness of the hole transport region may be in the range of about to about Within a range. When the hole transport region includes a hole injection layer, a hole transport layer, or any combination thereof, the thickness of the hole injection layer can be in the range of about to about , and the thickness of the hole transport layer can be in the range of about to about . For example, the thickness of the hole injection layer can be in the range of about to about . For example, the thickness of the hole transport layer can be in the range of about to about . When the thicknesses of the hole transport region, the hole injection layer, and the hole transport layer are within any of these ranges, satisfactory hole transport characteristics can be obtained without significantly increasing the driving voltage.

[0129] The emission assisting layer can increase the light emission efficiency by compensating for the optical resonance distance according to the wavelength of the light emitted from the emission layer, and the electron blocking layer can block the leakage of electrons from the emission layer to the hole transport region. The materials that can be included in the hole transport region can be included in the electron blocking layer.

[0130] [p-dopant]

[0131] In addition to these materials, the hole transport region can further include a charge generation material for improving the conductive properties. The charge generation material can be uniformly or non-uniformly dispersed in the hole transport region (for example, in the form of a single layer composed of the charge generation material).

[0132] The charge generation material can be, for example, a p-dopant.

[0133] For example, the p-dopant can have a lowest unoccupied molecular orbital (LUMO) energy level less than or equal to about -3.5 eV.

[0134] In an embodiment, the p-dopant can include a quinone derivative, a cyanide-containing compound, a compound including element EL1 and element EL2, or any combination thereof.

[0135] Examples of the quinone derivative can include TCNQ, F4-TCNQ, etc.

[0136] Examples of the cyanide-containing compound can include HAT-CN and the compound represented by Formula 221:

[0137]

[0138] [Formula 221]

[0139]

[0140] In Formula 221,

[0141] R221 to R 223 may each independently be unsubstituted or substituted by at least one R 10a substituted C 3 -C 60 carbocyclic group or unsubstituted or substituted by at least one R 10a substituted C 1 -C 60 heterocyclic group, and

[0142] R 221 to R 223 at least one of which may each independently be C 3 -C 60 carbocyclic group or C 1 -C 60 heterocyclic group substituted by: cyano; -F; -Cl; -Br; -I; C 1 -C 20 alkyl substituted by cyano, -F, -Cl, -Br, -I or any combination thereof; or any combination thereof.

[0143] In a compound comprising element EL1 and element EL2, element EL1 may be a metal, a metalloid or any combination thereof, and element EL2 may be a non-metal, a metalloid or any combination thereof.

[0144] Examples of metals may include: alkali metals (e.g., lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), etc.); alkaline earth metals (e.g., beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), etc.); transition metals (e.g., titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), technetium (Tc), rhenium (Re), iron (Fe), ruthenium (Ru), osmium (Os), cobalt (Co), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au), etc.); post-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.).

[0145] Examples of metalloids may include silicon (Si), antimony (Sb) and tellurium (Te).

[0146] Examples of non-metals may include oxygen (O) and halogens (e.g., F, Cl, Br, I, etc.).

[0147] Examples of compounds comprising element EL1 and element EL2 may include 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 any combination thereof.

[0148] Examples of metal oxides may include 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 rhenium oxides (e.g., ReO 3 etc.).

[0149] Examples of metal halides may include alkali metal halides, alkaline earth metal halides, transition metal halides, post-transition metal halides, and lanthanide metal halides.

[0150] Examples of alkali metal halides may include LiF, NaF, KF, RbF, CsF, LiCl, NaCl, KCl, RbCl, CsCl, LiBr, NaBr, KBr, RbBr, CsBr, LiI, NaI, KI, RbI, and CsI, etc.

[0151] Examples of alkaline earth metal halides may include BeF 2 、MgF 2 、CaF 2 、SrF 2 、BaF 2 、BeCl 2 、MgCl 2 、CaCl 2 、SrCl 2 、BaCl 2 、BeBr 2 、MgBr 2 、CaBr 2 、SrBr 2 、BaBr 2 、BeI 2, MgI 2 , CaI 2 , SrI 2 and BaI 2 .

[0152] Examples of transition metal halides can include titanium halides (e.g., TiF 4 , TiCl 4 , 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., ReF2 , ReCl 2 , ReBr 2 , ReI 2 etc.), ferrous halides (e.g., FeF 2 , FeCl 2 , FeBr 2 , FeI 2 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.), 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.).

[0153] Examples of post-transition metal halides can include zinc halides (e.g., ZnF 2 , ZnCl 2 , ZnBr 2 , ZnI 2etc.), indium halides (e.g., InI 3 etc.) and tin halides (e.g., SnI 2 etc.).

[0154] Examples of lanthanide metal halides may include 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 SmI 3 etc.

[0155] Examples of metalloid halides may include antimony halides (e.g., SbCl 5 etc.) etc.

[0156] Examples of metal tellurides may include alkali metal tellurides (e.g., Li 2 Te, Na 2 Te, K 2 Te, Rb 2 Te and Cs 2 Te etc.), alkaline earth metal tellurides (e.g., BeTe, MgTe, CaTe, SrTe and BaTe etc.), transition metal tellurides (e.g., TiTe 2 、ZrTe 2 、HfTe 2 、V 2 Te 3 、Nb 2 Te 3 、Ta 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 Au 2Te, etc.), post-transition metal tellurides (e.g., ZnTe, etc.), and lanthanide metal tellurides (e.g., LaTe, CeTe, PrTe, NdTe, PmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, and LuTe, etc.).

[0157] [Emissive layer in interlayer 130]

[0158] When the light-emitting device 10 is a full-color light-emitting device, the emissive layer can be patterned into a red emissive layer, a green emissive layer, and / or a blue emissive layer according to sub-pixels. In an embodiment, the emissive layer can have a stacked structure of two or more layers among a red emissive layer, a green emissive layer, and a blue emissive layer, where the two or more layers can be in contact with each other or can be separated from each other to emit white light. In an embodiment, the emissive layer can include two or more materials among a red light-emitting material, a green light-emitting material, and a blue light-emitting material, where the two or more materials can be mixed with each other in a single layer to emit white light.

[0159] In an embodiment, the emissive layer can include a host, a first dopant, and a second dopant. The dopant can include a phosphorescent dopant, a fluorescent dopant, or any combination thereof.

[0160] Relative to a total of 100 wt% of the emissive layer, the amount of the dopant in the emissive layer can be in the range of about 0.01 wt% to about 25 wt%.

[0161] For example, the total amount of the first dopant and the second dopant included in the emissive layer can be in the range of about 0.01 wt% to about 25 wt%.

[0162] In an embodiment, the emissive layer can include a delayed fluorescence material. The delayed fluorescence material can be used as a host or a dopant in the emissive layer.

[0163] The thickness of the emissive layer can be in the range of about to about . For example, the thickness of the emissive layer can be in the range of about to about . When the thickness of the emissive layer is within any of these ranges, excellent light-emitting characteristics can be obtained without significantly increasing the driving voltage.

[0164] The amounts of the first dopant and the second dopant can each be the same as those described herein.

[0165] [Host]

[0166] The hole-transporting host may be a compound having strong hole properties. The expression "compound having strong hole properties" refers to a compound that easily accepts holes, and such properties can be obtained by including a hole-accepting moiety (also referred to as a hole-transporting (HT) moiety).

[0167] Such an HT moiety may include, for example, a π-electron-rich heteroaromatic compound (e.g., a carbazole derivative or an indole derivative) or an aromatic amine compound.

[0168] The electron-transporting host may be a compound having strong electron properties. The expression "compound having strong electron properties" refers to a compound that easily accepts electrons, and such properties can be obtained by including an electron-accepting moiety (also referred to as an electron-transporting (ET) moiety).

[0169] Such an ET moiety may include, for example, a π-electron-deficient heteroaromatic compound. For example, the ET moiety may include a nitrogen-containing heteroaromatic compound.

[0170] The host of the emission layer of the light-emitting device according to the embodiment may be a single host or a bipolar host, and according to another embodiment, may be a mixed host including an electron-transporting host and a hole-transporting host.

[0171] When a compound includes only a hole-transporting moiety or only an electron-transporting moiety, it is clear whether the compound has hole-transporting properties or electron-transporting properties.

[0172] In an embodiment, the compound may include both a hole-transporting moiety and an electron-transporting moiety. In an embodiment, a simple comparison between the total number of hole-transporting moieties and the total number of electron-transporting moieties in the compound may be a criterion for predicting (or determining) whether the compound is a hole-transporting compound or an electron-transporting compound, but not necessarily an absolute criterion. One of the reasons why this comparison is not necessarily an absolute criterion is that the hole-attracting ability of the hole-transporting moiety and the electron-attracting ability of the electron-transporting moiety may not be exactly the same.

[0173] Therefore, a relatively reliable method for determining whether a compound having a specific structure is a hole-transporting compound or an electron-transporting compound is to implement the compound in a device.

[0174] In an embodiment, the host may include a compound represented by Formula 301:

[0175] [Formula 301]

[0176] [Ar 301 xb11 -[(L 301 ) xb1 -R 301 xb21 .

[0177] ​​In formula 301,

[0178] Ar 301 and L 301 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,

[0179] xb11 can be 1, 2 or 3,

[0180] xb1 may be an integer selected from 0 to 5,

[0181] 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 ),

[0182] xb21 may be an integer selected from 1 to 5, and

[0183] Q 301 To Q303 may be each independently the same as those referred to herein with respect to Q 1 described.

[0184] In an embodiment, in Formula 301, when xb11 is 2 or greater, two or more Ars 301 may be connected to each other via a single bond.

[0185] In an embodiment, the hole transport host may include a compound represented by Formula 301-1, a compound represented by Formula 301-2, or any combination thereof:

[0186] [Formula 301-1]

[0187]

[0188] [Formula 301-2]

[0189]

[0190] In Formula 301-1 and Formula 301-2,

[0191] Ring A 301 to Ring A 304 may each independently be an unsubstituted or at least one R 10a substituted C 3 -C 60 carbocyclic group or an unsubstituted or at least one R 10a substituted C 1 -C 60 heterocyclic group,

[0192] X 301 may be O, S, N[(L 304 ) xb4 -R 304 , C(R 304 )(R 305 ), or Si(R 304 )(R 305 ),

[0193] xb22 and xb23 may each independently be 0, 1, or 2,

[0194] L 301 to L 304 may each independently be an unsubstituted or at least one R 10a substituted C 3 -C 60 carbocyclic group or an unsubstituted or at least one R 10a substituted C 1 -C 60 heterocyclic group,

[0195] R301 to R 305 and R 311 to R 314 may each independently be hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, unsubstituted or substituted by at least one R 10a substituted C 1 -C 60 alkyl, unsubstituted or substituted by at least one R 10a substituted C 2 -C 60 alkenyl, unsubstituted or substituted by at least one R 10a substituted C 2 -C 60 alkynyl, unsubstituted or substituted by at least one R 10a substituted C 1 -C 60 alkoxy, unsubstituted or substituted by at least one R 10a substituted C 3 -C 60 carbocyclic group, unsubstituted or substituted by 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 ), and

[0196] xb1 to xb4 may each independently be an integer selected from 0 to 5.

[0197] In an embodiment, the electron transport host may include a compound represented by Formula 1:

[0198] [Formula 1]

[0199]

[0200] In Formula 1,

[0201] Ring Ar 3 to Ring Ar 5 may each independently be C 5 -C 60 carbocyclic group or C 1 -C 60Heterocyclic group

[0202] E can be N or C(R" 6 )

[0203] F can be N or C(R" 7 )

[0204] G can be N or C(R" 8 )

[0205] R" 3 to R" 8 can each independently be hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, unsubstituted or substituted by at least one R 10a substituted C 1 -C 60 alkyl, unsubstituted or substituted by at least one R 10a substituted C 2 -C 60 alkenyl, unsubstituted or substituted by at least one R 10a substituted C 2 -C 60 alkynyl, unsubstituted or substituted by at least one R 10a substituted C 1 -C 60 alkoxy, unsubstituted or substituted by at least one R 10a substituted C 3 -C 10 cycloalkyl, unsubstituted or substituted by at least one R 10a substituted C 1 -C 10 heterocycloalkyl, unsubstituted or substituted by at least one R 10a substituted C 3 -C 10 cycloalkenyl, unsubstituted or substituted by at least one R 10a substituted C 1 -C 10 heterocycloalkenyl, unsubstituted or substituted by at least one R 10a substituted C 6 -C 60 aryl, unsubstituted or substituted by at least one R 10a substituted C 6 -C 60 aryloxy, unsubstituted or substituted by at least one R 10a substituted C 6 -C 60 arylthio, unsubstituted or substituted by at least one R 10a substituted C 1 -C 60 heteroaryl, unsubstituted or substituted by at least one R 10a substituted C8 -C 60 Monovalent non-aromatic fused polycyclic group, unsubstituted or substituted by at least one R 10a substituted C 1 -C 60 Monovalent non-aromatic fused heteropolycyclic group, -Si(Q 1 )(Q 2 )(Q 3 )、-B(Q 1 )(Q 2 )、-N(Q 1 )(Q 2 )、-P(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-S(=O)(Q 1 )、-S(=O) 2 (Q 1 )、-P(=O)(Q 1 )(Q 2 ) or -P(=S)(Q 1 )(Q 2 ),

[0206] b"3 to b"5 can each independently be an integer selected from 1 to 5,

[0207] When b"3 is 2 or greater, multiple R" 3 can be the same as or different from each other. When b"4 is 2 or greater, multiple R" 4 can be the same as or different from each other, and when b"5 is 2 or greater, multiple R" 5 can be the same as or different from each other,

[0208] R” 3 to R” 8 Two or more adjacent substituents in can optionally bond to each other to form an unsubstituted or at least one R-substituted C 10a substituted C 5 -C 60 carbocyclic group or an unsubstituted or at least one R-substituted C 10a substituted C 1 -C 60 heterocyclic group,

[0209] Q 1 to Q 3 can each independently be: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C 1 -C 60 alkyl; C 2 -C 60 alkenyl; C 2 -C 60 alkynyl; C1 -C 60 alkoxy; or

[0210] each unsubstituted or substituted by the following C 3 -C 60 carbocyclic group, C 1 -C 60 heterocyclic group, C 7 -C 60 aralkyl or C 2 -C 60 heteroaralkyl: deuterium, -F, cyano, C 1 -C 60 alkyl, C 1 -C 60 alkoxy, phenyl, biphenyl or any combination thereof.

[0211] In an embodiment, the host may include an alkaline earth metal complex. For example, the host may include a Be complex (e.g., compound H55), a Mg complex, a Zn complex or any combination thereof.

[0212] In an embodiment, the host may include one of compounds H1 to H124, one of compounds HT-01 to HT-35, one of compounds ET-01 to ET-023, 9,10-bis(2-naphthyl)anthracene (ADN), 2-methyl-9,10-bis(naphthalen-2-yl)anthracene (MADN), 9,10-bis(2-naphthyl)-2-tert-butyl-anthracene (TBADN), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), 1,3-bis(9-carbazolyl)benzene (mCP), 1,3,5-tris(carbazol-9-yl)benzene (TCP) or any combination thereof:

[0213]

[0214]

[0215]

[0216]

[0217]

[0218]

[0219]

[0220]

[0221]

[0222]

[0223] [Phosphorescent dopant]

[0224] In an embodiment, the phosphorescent dopant may include at least one transition metal as a central metal.

[0225] The phosphorescent dopant may include a monodentate ligand, a bidentate ligand, a tridentate ligand, a tetradentate ligand, a pentadentate ligand, a hexadentate ligand, or any combination thereof.

[0226] The phosphorescent dopant may be electrically neutral.

[0227] In an embodiment, the first dopant may include an organometallic compound represented by Formula 401 as the phosphorescent dopant:

[0228] [Formula 401]

[0229] M(L 401 ) xc1 (L 402 ) xc2

[0230] [Formula 402]

[0231]

[0232] In Formulas 401 and 402,

[0233] 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)),

[0234] L 401 may be a ligand represented by Formula 402, and xc1 may be 1, 2, or 3, where when xc1 is 2 or greater, two or more L 401 may be the same as or different from each other,

[0235] L 402 may be an organic ligand, and xc2 may be 0, 1, 2, 3, or 4, where when xc2 is 2 or greater, two or more L 402 may be the same as or different from each other,

[0236] X 401 and X 402 may each independently be nitrogen or carbon,

[0237] Ring A 401 and Ring A 402 may each independently be C 3 -C 60 a carbocyclic group or C1 -C 60 heterocyclic group

[0238] T 401 may be a single bond, -O-, -S-, -C(=O)-, -N(Q 411 ), -C(Q 411 )(Q 412 )-, -C(Q 411 )=C(Q 412 )-,

[0239] -C(Q 411 )= or =C=,

[0240] X 403 and X 404 may each independently be 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 ),

[0241] Q 411 to Q 414 may each independently be the same as described herein with reference to Q 1 .

[0242] R 401 and R 402 may each independently be hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, unsubstituted or substituted by at least one R 10a substituted C 1 -C 20 alkyl, unsubstituted or substituted by at least one R 10a substituted C 1 -C 20 alkoxy, unsubstituted or substituted by at least one R 10a substituted C 3 -C 60 carbocyclic group, unsubstituted or substituted by 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 ),

[0243] Q 401 to Q 403 may each independently be the same as those described herein with reference to Q 1 described,

[0244] xc11 and xc12 may each independently be an integer selected from 0 to 10, and

[0245] * and *' in Formula 402 each indicate a bonding site to M in Formula 401.

[0246] In an embodiment, in Formula 402, X 401 may be nitrogen and X 402 may be carbon, or X 401 and X 402 may each be nitrogen.

[0247] In an embodiment, in Formula 401, when xc1 is 2 or greater, two or more L 401 in two rings A 401 may optionally be connected to each other via T 402 as a linking group, or two rings A 402 may optionally be connected to each other via T 403 as a linking group (see Compound PD1 to Compound PD4 and Compound PD7). T 402 and T 403 may each independently be the same as those described herein with reference to T 401 described.

[0248] In Formula 401, L 402 may be an organic ligand. For example, L 402 may include a halogen group, a diketone group (e.g., acetylacetonate group), a carboxylic acid group (e.g., picolinate group), -C(=O), an isocyano group, a -CN group, a phosphorus-containing group (e.g., a phosphine group, a phosphite group, etc.) or any combination thereof.

[0249] In the ligand of the organometallic compound represented by Formula 401, adjacent substituents may optionally bond to each other to form a ring.

[0250] In an embodiment, the phosphorescent dopant may include, for example, one of Compounds PD1 to PD39, one of Compounds 1 to 120, or any combination thereof:

[0251]

[0252]

[0253]

[0254]

[0255]

[0256]

[0257]

[0258] [Fluorescent dopant]

[0259] The fluorescent dopant may include an amine group-containing compound, a styryl group-containing compound, or any combination thereof.

[0260] In an embodiment, the fluorescent dopant may include a compound represented by Formula 501:

[0261] [Formula 501]

[0262]

[0263] In Formula 501,

[0264] Ar 501 , L 501 to L 503 , R 501 and R 502 may each independently be an unsubstituted or at least one R 10a substituted C 3 -C 60 carbocyclic group or an unsubstituted or at least one R 10a substituted C 1 -C 60 heterocyclic group,

[0265] xd1 to xd3 may each independently be 0, 1, 2, or 3, and

[0266] xd4 may be 1, 2, 3, 4, 5, or 6.

[0267] In an embodiment, in Formula 501, Ar 501 may be a fused ring group in which three or more monocyclic groups are fused together (e.g., anthryl, 1,2-benzophenanthryl, or pyrenyl).

[0268] In an embodiment, in Formula 501, xd4 may be 2.

[0269] In an embodiment, the fluorescent dopant may include: one of Compounds FD1 to FD36; DPVBi; DPAVBi; or any combination thereof:

[0270]

[0271]

[0272]

[0273] [Thermally activated delayed fluorescence material]

[0274] The emissive layer may include a thermally activated delayed fluorescence material.

[0275] In the specification, the thermally activated delayed fluorescence material may be selected from compounds capable of emitting thermally activated delayed fluorescence based on a thermally activated delayed fluorescence emission mechanism.

[0276] Depending on the type of other materials included in the emissive layer, the thermally activated delayed fluorescence material included in the emissive layer may be used as a host or as a dopant.

[0277] In an embodiment, the difference between the triplet energy level (eV) of the thermally activated delayed fluorescence material and the singlet energy level (eV) of the thermally activated delayed fluorescence material may be in the range of about 0 eV to about 0.5 eV. When the difference between the triplet energy level (eV) of the thermally activated delayed fluorescence material and the singlet energy level (eV) of the thermally activated delayed fluorescence material satisfies the above range, upconversion from the triplet state to the singlet state of the thermally activated delayed fluorescence material may occur effectively, and thus, the luminous efficiency of the light-emitting device 10 may be improved.

[0278] For example, the thermally activated delayed fluorescence material may include: a material including at least one electron donor (e.g., a π - electron rich C 3 -C 60 ring group such as a carbazolyl group) and at least one electron acceptor (e.g., a sulfinyl group, a cyano group, or a π - electron deficient nitrogen - containing C 1 -C 60 ring group); or a material including a C 8 -C 60 polycyclic group in which two or more ring groups are fused while sharing boron (B).

[0279] In an embodiment, the second dopant may include a compound represented by Formula 2 as the thermally activated delayed fluorescence material:

[0280] [Formula 2]

[0281]

[0282] In Formula 2,

[0283] Y 1 to Y 3Each may independently be S, N(R 24 ), B(R 24 ), C(R 24 )(R 25 ), or Si(R 24 )(R 25 ),

[0284] c may be 0 or 1,

[0285] A 11 to A 13 may each independently be C 5 -C 30 carbocyclic group or C 1 -C 30 heterocyclic group,

[0286] R 21 to R 25 may each independently be hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, amino, amidino, hydrazino, hydrazono, carboxy or its salt, sulfo or its salt, phospho or its salt, unsubstituted or substituted by at least one R 10a substituted C 1 -C 60 alkyl, unsubstituted or substituted by at least one R 10a substituted C 2 -C 60 alkenyl, unsubstituted or substituted by at least one R 10a substituted C 2 -C 60 alkynyl, unsubstituted or substituted by at least one R 10a substituted C 1 -C 60 alkoxy, unsubstituted or substituted by at least one R 10a substituted C 3 -C 10 cycloalkyl, unsubstituted or substituted by at least one R 10a substituted C 1 -C 10 heterocycloalkyl, unsubstituted or substituted by at least one R 10a substituted C 3 -C 10 cycloalkenyl, unsubstituted or substituted by at least one R 10a substituted C 1 -C 10 heterocycloalkenyl, unsubstituted or substituted by at least one R 10a substituted C 6 -C 60 aryl, unsubstituted or substituted by at least one R 10a substituted C 6 -C 60Aryloxy, unsubstituted or substituted with at least one R 10a Substituted C 6 -C 60 Arylthio, unsubstituted or substituted with at least one R 10a Substituted C 1 -C 60 Heteroaryl, unsubstituted or substituted with at least one R 10a A substituted monovalent non-aromatic fused polycyclic group, unsubstituted or replaced by at least one R 10a Substituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q 1 )(Q 2 )(Q 3 )、-N(Q 1 )(Q 2 )、-B(Q 1 )(Q 2 )、-P(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-S(=O) 2 (Q 1 ) or -P(=O)(Q 1 )(Q 2 ),

[0287] R 21 To R 25 may be optionally bonded to each other to form an unsubstituted or substituted R 10a Substituted C 5 -C 30 A carbocyclic group and unsubstituted or substituted with at least one R 10a Substituted C 1 -C 30 Heterocyclic group,

[0288] a21 to a23 may each independently be an integer selected from 0 to 10,

[0289] R 10a Can be:

[0290] deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro;

[0291] 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 -C60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 7 -C 60 Arylalkyl group, C 2 -C 60 Heteroarylalkyl group, -Si(Q 11 )(Q 12 )(Q 13 ), -N(Q 11 )(Q 12 ), -B(Q 11 )(Q 12 ), -C(=O)(Q 11 ), -S(=O) 2 (Q 11 ), -P(=O)(Q 11 )(Q 12 ), or any combination thereof;

[0292] Each unsubstituted or substituted C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 7 -C 60 Arylalkyl group or C 2 -C 60 Heteroarylalkyl group: deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl group, C 1 -C 60 Alkoxy group, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 7 -C 60 Arylalkyl group, C 2 -C 60Heteroaralkyl, -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

[0293] -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

[0294] Q 1 to Q 3 , Q 11 to Q 13 , Q 21 to Q 23 and Q 31 to Q 33 can each independently be: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxy; cyano; nitro; C 1 -C 60 alkyl; C 2 -C 60 alkenyl; C 2 -C 60 alkynyl; C 1 -C 60 alkoxy; or C 3 -C 60 carbocyclic group, C 1 -C 60 heterocyclic group, C 7 -C 60 aralkyl or C 2 -C 60 heteroaralkyl: deuterium, -F, cyano, C 1 -C 60 alkyl, C 1 -C60 An alkoxy group, a phenyl group, a biphenyl group, or any combination thereof.

[0295] In an embodiment, the delayed fluorescence material may include at least one of Compound DF1 to Compound DF9 and Compound D-01 to Compound D-55:

[0296]

[0297]

[0298]

[0299]

[0300]

[0301] [Electron transport region in the interlayer 130]

[0302] The electron transport region may have a single-layer structure composed of a single layer (composed of a single material), a single-layer structure composed of a single layer containing different materials, or a multi-layer structure including multiple layers containing different materials.

[0303] The electron transport region may include a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0304] In an embodiment, the electron transport region may have an electron transport layer / electron injection layer structure or a hole blocking layer / electron transport layer / electron injection layer structure, where the layers of each structure may be stacked in the order described from the emission layer, but the structure of the electron transport region is not limited thereto.

[0305] In an embodiment, the electron transport region (e.g., the hole blocking layer or the electron transport layer in the electron transport region) may include a metal-free compound containing at least one nitrogen-containing C with a deficient π electron 1 -C 60 ring group.

[0306] In an embodiment, the electron transport region may include a compound represented by Formula 601:

[0307] [Formula 601]

[0308] [Ar 601 xe11 -[(L 601 ) xe1 -R 601 xe21 .

[0309] In Formula 601,

[0310] Ar 601 ​​and L 601 may each independently be unsubstituted or substituted by at least one R 10a -substituted C 3 -C 60 -carbocyclic group or unsubstituted or substituted by at least one R 10a -substituted C 1 -C 60 -heterocyclic group,

[0311] xe11 can be 1, 2 or 3,

[0312] xe1 can be 0, 1, 2, 3, 4 or 5,

[0313] R 601 may be unsubstituted or substituted by at least one R 10a -substituted C 3 -C 60 -carbocyclic group, unsubstituted or substituted by 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 ),

[0314] Q 601 to Q 603 may each independently be the same as described herein with reference to Q 1 described,

[0315] xe21 can be 1, 2, 3, 4 or 5, and

[0316] Ar 601 、L 601 and R 601 at least one of which may each independently be unsubstituted or substituted by at least one R 10a -substituted π-deficient nitrogen-containing C 1 -C 60 -cyclic group.

[0317] In an embodiment, in Formula 601, when xe11 is 2 or greater, two or more Ar 601 may be connected to each other via a single bond.

[0318] In an embodiment, in Formula 601, Ar 601 may be unsubstituted or substituted by at least one R 10a -substituted anthryl group.

[0319] In an embodiment, the electron transport region may include a compound represented by Formula 601-1:

[0320] [Formula 601-1]

[0321]

[0322] In Formula 601-1,

[0323] X 614 may be N or C(R 614 ), X 615 may be N or C(R 615 ), X 616 may be N or C(R 616 ), and at least one of X 614 to X 616 may each be N,

[0324] L 611 to L 613 may each independently be the same as described herein with reference to L 601 .

[0325] Xe611 to Xe613 may each independently be the same as described herein with reference to Xe1

[0326] R 611 to R 613 may each independently be the same as described herein with reference to R 601 , and

[0327] R 614 to R 616 may each independently be hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, C 1 -C 20 alkyl, C 1 -C 20 alkoxy, unsubstituted or substituted with at least one R 10a substituted C 3 -C 60 carbocyclic group or unsubstituted or substituted with at least one R 10a substituted C 1 -C 60 heterocyclic group

[0328] In an embodiment, in Formula 601 and Formula 601-1, Xe1 and Xe611 to Xe613 may each independently be 0, 1, or 2

[0329] In an embodiment, the electron transport region may include one of Compound ET1 to Compound ET45, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), Alq 3 , BAlq, TAZ, NTAZ, or any combination thereof:

[0330]

[0331]

[0332]

[0333] The thickness of the electron transport region may be in the range of about to about . For example, the thickness of the electron transport region may be in the range of about to about . When the electron transport region includes a hole blocking layer, an electron transport layer, or any combination thereof, the thickness of the hole blocking layer or the electron transport layer may each independently be in the range of about to about . For example, the thickness of the hole blocking layer or the electron transport layer may each independently be in the range of about to about . The thickness of the electron transport layer may be in the range of about to about . For example, the thickness of the electron transport layer may be in the range of about to about . When the thickness of the hole blocking layer and / or the electron transport layer is within these ranges, satisfactory electron transport characteristics can be obtained without significantly increasing the driving voltage.

[0334] In addition to the above materials, the electron transport region (e.g., the electron transport layer in the electron transport region) may further include a metal-containing material.

[0335] The metal-containing material may include an alkali metal complex, an alkaline earth metal complex, or any combination thereof. The metal ion of the alkali metal complex may be a Li ion, a Na ion, a K ion, an 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.

[0336] 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, hydroxyphenyl oxazole, hydroxyphenyl thiazole, hydroxyphenyl oxadiazole, hydroxyphenyl thiadiazole, hydroxyphenyl pyridine, hydroxyphenyl benzimidazole, hydroxyphenyl benzothiazole, bipyridine, phenanthroline, cyclopentadiene, or any combination thereof.

[0337] 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:

[0338]

[0339] The electron transport region may include an electron injection layer that facilitates injection of electrons from the second electrode 150. The electron injection layer may contact (e.g., directly contact) the second electrode 150.

[0340] The electron injection layer may have a single-layer structure composed of a single layer (composed of a single material), a single-layer structure composed of a single layer containing different materials, or a multi-layer structure including multiple layers containing different materials.

[0341] The electron injection layer may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof.

[0342] The alkali metal may include Li, Na, K, Rb, Cs, or any combination thereof. The alkaline earth metal may include Mg, Ca, Sr, Ba, or any combination thereof. The rare earth metal may include Sc, Y, Ce, Tb, Yb, Gd, or any combination thereof.

[0343] The alkali metal compound, alkaline earth metal compound, and rare earth metal compound may include oxides, halides (e.g., fluorides, chlorides, bromides, or iodides), or tellurides of the alkali metal, alkaline earth metal, and rare earth metal, or any combination thereof.

[0344] The alkali metal compound may include: alkali metal oxides, such as Li 2 O, Cs 2 O, or K 2 O; alkali metal halides, such as LiF, NaF, CsF, KF, LiI, NaI, CsI, or KI; or any combination thereof. The alkaline earth metal compound may include alkaline earth metal oxides, such as BaO, SrO, CaO, Ba x Sr 1-x O (where x is a real number satisfying the condition 0 < x < 1) or Ba x Ca 1-x O (where x is a real number satisfying the condition 0 < x < 1), etc. The rare earth metal compound may include YbF 3 、ScF 3 、Sc 2 O 3 、Y 2 O 3 、Ce2 O 3 、 GdF 3 、 TbF 3 、 YbI 3 、 ScI 3 、 TbI 3 or any combination thereof. In an embodiment, the rare earth metal-containing compound may include lanthanide metal tellurides. Examples of lanthanide metal tellurides may include 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 2 Te 3 。

[0345] Alkali metal complexes, alkaline earth metal complexes, and rare earth metal complexes may include: alkali metal ions, alkaline earth metal ions, or rare earth metal ions; and ligands bonded to the metal ions (e.g., hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyl oxazole, hydroxyphenyl thiazole, hydroxyphenyl oxadiazole, hydroxyphenyl thiadiazole, hydroxyphenyl pyridine, hydroxyphenyl benzimidazole, hydroxyphenyl benzothiazole, bipyridine, phenanthroline, cyclopentadiene, or any combination thereof).

[0346] The electron injection layer may be composed 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 any combination thereof as described above. In an embodiment, the electron injection layer may further include an organic material (e.g., a compound represented by Formula 601).

[0347] In an embodiment, the electron injection layer may be composed of an alkali metal-containing compound (e.g., an alkali metal halide); or the electron injection layer may be composed of an alkali metal-containing compound (e.g., an alkali metal halide) and an alkali metal, an alkaline earth metal, a rare earth metal, or any combination thereof. For example, the electron injection layer may be a KI:Yb co-deposited layer, a RbI:Yb co-deposited layer, a LiF:Yb co-deposited layer, etc.

[0348] When the electron injection layer further includes an organic material, the alkali metal, alkaline earth metal, rare earth metal, alkali metal-containing compound, alkaline earth metal-containing compound, rare earth metal-containing compound, alkali metal complex, alkaline earth metal complex, rare earth metal complex, or any combination thereof may be uniformly or non-uniformly dispersed in a matrix including the organic material.

[0349] The thickness of the electron injection layer may be in the range of about to about . For example, the thickness of the electron injection layer may be in the range of about to about . When the thickness of the electron injection layer is within any of the above ranges, satisfactory electron injection characteristics can be obtained without significantly increasing the driving voltage.

[0350] [Second Electrode 150]

[0351] The second electrode 150 may be located on the interlayer 130 having the structure as described above. The second electrode 150 may serve as the cathode of the electron injection electrode. When the second electrode 150 is the cathode, the material used to form the second electrode 150 may include materials having a low work function, such as metals, alloys, conductive compounds, or any combination thereof.

[0352] The second electrode 150 may include lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), ytterbium (Yb), silver-ytterbium (Ag-Yb), ITO, IZO, or any combination thereof. The second electrode 150 may be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.

[0353] The second electrode 150 may have a single-layer structure or a multi-layer structure.

[0354] [Capping Layer]

[0355] The light-emitting device 10 may include a first capping layer outside the first electrode 110 and / or a second capping layer outside the second electrode 150. For example, 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 stacked in this order, a structure in which the first electrode 110, the interlayer 130, the second electrode 150, and the second capping layer are stacked in this 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 stacked in this order.

[0356] The light generated in the emission layer of the interlayer 130 of the light-emitting device 10 may be extracted to the outside through the first electrode 110, which may be a semi-transmissive electrode or a transmissive electrode, and through the first capping layer. The light generated in the emission layer of the interlayer 130 of the light-emitting device 10 may be extracted to the outside through the second electrode 150, which may be a semi-transmissive electrode or a transmissive electrode, and through the second capping layer.

[0357] The first capping layer and the second capping layer may each increase the external emission efficiency according to the principle of constructive interference. Accordingly, the light extraction efficiency of the light-emitting device 10 is increased so that the luminous efficiency of the light-emitting device 10 can be improved.

[0358] The first capping layer and the second capping layer may each include a material having a refractive index greater than or equal to about 1.6 (relative to a wavelength of about 589 nm).

[0359] 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.

[0360] At least one of the first capping layer and the second capping layer may each independently include a carbocyclic compound, a heterocyclic compound, an amino group-containing compound, a porphyrin derivative, a phthalocyanine derivative, a naphthalocyanine derivative, an alkali metal complex, an alkaline earth metal complex, or any combination thereof. The carbocyclic compound, the heterocyclic compound, and the amino group-containing compound may each optionally be substituted with a substituent including O, N, S, Se, Si, F, Cl, Br, I, or any combination thereof.

[0361] In an embodiment, at least one of the first capping layer and the second capping layer may each independently include an amino group-containing compound.

[0362] In an embodiment, at least one of the first capping layer and the second capping layer may each independently include a compound represented by Formula 201, a compound represented by Formula 202, or any combination thereof.

[0363] In an embodiment, at least one of the first capping layer and the second capping layer may each independently include one of compounds HT28 to HT33, one of compounds CP1 to CP6, β-NPB, or any combination thereof:

[0364]

[0365]

[0366] [Electronic device]

[0367] The light-emitting device may be included in various electronic devices. For example, the electronic device including the light-emitting device may be a light-emitting device and an authentication device, etc.

[0368] In addition to the light-emitting device, the electronic device (e.g., the light-emitting device) may further include: a color filter, a color conversion layer, or a color filter and a color conversion layer. The color filter and / or 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. The light-emitting device may be the light-emitting device described herein. In an embodiment, the color conversion layer may include quantum dots.

[0369] The electronic device may include a first substrate. The first substrate may include a plurality of sub-pixels, the color filter may include a plurality of color filter regions respectively corresponding to the plurality of sub-pixels, and the color conversion layer may include a plurality of color conversion regions respectively corresponding to the plurality of sub-pixels.

[0370] The pixel defining layer may be located between the plurality of sub-pixels to define each sub-pixel.

[0371] The color filter may further include a plurality of color filter regions and a plurality of light-shielding patterns located between the plurality of color filter regions, and the color conversion layer may further include a plurality of color conversion regions and a plurality of light-shielding patterns located between the plurality of color conversion regions.

[0372] The color filter region (or the color conversion region) may include a first region that emits first color light, a second region that emits second color light, and / or a third region that emits third color light, where 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. In an embodiment, the color filter region (or the color conversion region) may include quantum dots. In an embodiment, the first region may include red quantum dots, the second region may include green quantum dots, and the third region may not include quantum dots. The quantum dots may be the quantum dots described herein. The first region, the second region, and / or the third region may each include a scatterer.

[0373] In an embodiment, the light-emitting device may emit first light, a first region may absorb the first light to emit first first-color light, a second region may absorb the first light to emit second first-color light, and a third region may absorb the first light to emit third first-color light. In an embodiment, the first first-color light, the second first-color light, and the third first-color light may have maximum emission wavelengths different from each other. In an embodiment, 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.

[0374] In addition to the light-emitting device as described above, the electronic device may further include a thin-film transistor. The thin-film transistor may include a source electrode, a drain electrode, and an active layer, wherein either the source electrode or the drain electrode may be electrically connected to either the first electrode or the second electrode of the light-emitting device.

[0375] The thin-film transistor may further include a gate electrode or a gate insulating film, etc.

[0376] The active layer may include crystalline silicon, amorphous silicon, an organic semiconductor, an oxide semiconductor, etc.

[0377] 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 may allow the light from the light-emitting device to be extracted to the outside, and may prevent environmental 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.

[0378] According to the use of the electronic device, in addition to the color filter and / or the color conversion layer, various functional layers may be further included on the sealing portion. Examples of the functional layer may include a touchscreen layer and a polarization layer, etc. The touchscreen layer may be a pressure-sensitive touchscreen layer, a capacitive touchscreen layer, or an infrared touchscreen layer. The authentication device may be, for example, a biometric authentication device that authenticates an individual by using biometric information of a living body (such as a fingertip, a pupil, etc.).

[0379] In addition to the light-emitting device as described above, the authentication device may further include a biometric information collector.

[0380] The electronic device can be applied to various displays, light sources, lighting devices, personal computers (e.g., mobile personal computers), mobile phones, digital cameras, electronic notebooks, electronic dictionaries, electronic game consoles, medical tools (e.g., electronic thermometers, sphygmomanometers, glucometers, pulse measurement devices, pulse wave measurement devices, electrocardiogram monitors, ultrasonic diagnostic devices or endoscope monitors), fish finders, various measurement tools, meters (e.g., meters for vehicles, aircraft, and ships), and projectors, etc.

[0381] Figure 2 and Figure 3 description of]

[0382] Figure 2 is a schematic cross-sectional view of an electronic device according to an embodiment.

[0383] Figure 2 The electronic device of includes a substrate 100, a thin film transistor (TFT), a light-emitting device, and a package portion 300 that seals the light-emitting device.

[0384] The substrate 100 can be a flexible substrate, a glass substrate, or a metal substrate. A buffer layer 210 can be located on the substrate 100. The buffer layer 210 can prevent the penetration of impurities through the substrate 100 and can provide a flat surface on the substrate 100.

[0385] The TFT can be located on the buffer layer 210. The TFT can include an active layer 220, a gate electrode 240, a source electrode 260, and a drain electrode 270.

[0386] The active layer 220 can include an inorganic semiconductor (such as silicon or polysilicon), an organic semiconductor, or an oxide semiconductor, and can include a source region, a drain region, and a channel region.

[0387] A gate insulating film 230 for insulating the active layer 220 from the gate electrode 240 can be located on the active layer 220, and the gate electrode 240 can be located on the gate insulating film 230.

[0388] An interlayer insulating film 250 can be located on the gate electrode 240. The interlayer insulating film 250 can 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.

[0389] The source electrode 260 and the drain electrode 270 can be located on the interlayer insulating film 250. The interlayer insulating film 250 and the gate insulating film 230 can be formed to expose the source region and the drain region of the active layer 220, and the source electrode 260 and the drain electrode 270 can respectively contact the exposed portions of the source region and the drain region of the active layer 220.

[0390] ​The TFT can be electrically connected to the light-emitting device to drive the light-emitting device, and can be covered and protected by the passivation layer 280. The passivation layer 280 can include an inorganic insulating film, an organic insulating film, or any combination thereof. The light-emitting device is provided on the passivation layer 280. The light-emitting device can include a first electrode 110, an interlayer 130, and a second electrode 150.

[0391] The first electrode 110 can be located on the passivation layer 280. The passivation layer 280 may not completely cover the drain electrode 270 and may expose a portion of the drain electrode 270. The first electrode 110 can be electrically connected to the exposed portion of the drain electrode 270.

[0392] The pixel defining layer 290 including an insulating material can be located on the first electrode 110. The pixel defining layer 290 can expose a region of the first electrode 110, and the interlayer 130 can be formed in the exposed region of the first electrode 110. The pixel defining layer 290 can be a polyimide organic film or a polyacrylic acid organic film. Although not shown in Figure 2 , at least some layers of the interlayer 130 can extend beyond the upper portion of the pixel defining layer 290, thereby being provided in the form of a common layer.

[0393] The second electrode 150 can be located on the interlayer 130, and a capping layer 170 can be further included on the second electrode 150. The capping layer 170 can be formed to cover the second electrode 150.

[0394] The encapsulation part 300 can be located on the capping layer 170. The encapsulation part 300 can be located on the light-emitting device to protect the light-emitting device from moisture and / or oxygen. The encapsulation part 300 can include: an inorganic film, which includes silicon nitride (SiN x ), silicon oxide (SiO x ), indium tin oxide, indium zinc oxide, or any combination thereof; an organic film, which includes polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyvinyl sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane, acrylic resin (e.g., polymethyl methacrylate or polyacrylic acid, etc.), epoxy resin (e.g., aliphatic glycidyl ether (AGE), etc.), or any combination thereof; or any combination of an inorganic film and an organic film.

[0395] Figure 3 It is a schematic cross-sectional view of an electronic device according to another embodiment.

[0396] Figure 3 The electronic device of Figure 2 may be different from the electronic device of Figure 2The light-emitting device included in the electronic device may be a series light-emitting device.

[0397] [Manufacturing method]

[0398] Each layer constituting the hole transport region, the emission layer, and each layer constituting the electron transport region may be formed in a selected region by using one or more suitable methods selected from vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, inkjet printing, laser printing, and laser-induced thermal imaging.

[0399] When each layer constituting the hole transport region, the emission layer, and each layer constituting the electron transport region are formed by vacuum deposition, the deposition may be carried out at a deposition temperature of about 100 °C to about 500 °C, a vacuum degree of about 10 -8 torr to about 10 -3 torr, and a deposition rate of about seconds to about seconds, depending on the material to be included in the layer to be formed and the structure of the layer to be formed.

[0400] When each layer constituting the hole transport region, the emission layer, and each layer constituting the electron transport region are formed by spin coating, considering the material to be included in the layer to be formed and the structure of the layer to be formed, the spin coating may be carried out at a coating speed of about 2,000 rpm to about 5,000 rpm and a heat treatment temperature of about 80 °C to about 200 °C.

[0401] [Definition of terms]

[0402] As used herein, the term "C 3 -C 60 carbocyclic group" may be a cyclic group composed of carbon atoms as the only ring-forming atoms and having 3 to 60 carbon atoms. As used herein, the term "C 1 -C 60 heterocyclic group" may be a cyclic group having 1 to 60 carbon atoms and further having at least one heteroatom as a ring-forming atom in addition to carbon atoms. C 3 -C 60 carbocyclic group and C 1 -C 60 heterocyclic group may each be a monocyclic group composed of one ring or a polycyclic group in which two or more rings are fused to each other. For example, C 1 -C 60 heterocyclic group may have 3 to 61 ring-forming atoms.

[0403] As used herein, the term "cyclic group" may be C 3 -C 60 carbocyclic group or C 1 -C 60 heterocyclic group.

[0404] As used herein, the term "π - electron - rich C 3 -C 60 cyclic group" may have 3 to 60 carbon atoms and may not include *-N=*' as a ring - forming moiety. As used herein, the term "π - electron - deficient nitrogen - containing C 1 -C 60 cyclic group" may be a heterocyclic group having 1 to 60 carbon atoms and may include *-N=*' as a ring - forming moiety.

[0405] In an embodiment, the C 3 -C 60 carbocyclic group may be a T1 group, or a group in which two or more T1 groups are fused to each other (e.g., cyclopentadienyl, adamantyl, norbornyl, phenyl, pentaphenylenyl, naphthyl, azulyl, indacenyl, acenaphthylenyl, phenalenyl, phenanthryl, anthryl, fluoranthenyl, triphenylenyl, pyrenyl, 1,2 - benzophenanthrenyl, perylenyl, pentaphenyl, heptaphenylenyl, tetracenyl, picenyl, hexaphenyl, pentacenyl, rubicenyl, coronenyl, ovalenyl, indenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, indeno - phenanthrenyl or indeno - anthracenyl),

[0406] The C 1 -C 60 heterocyclic group may be a T2 group, a group in which two or more T2 groups are fused to each other, or a group in which at least one T2 group and at least one T1 group are fused to each other (e.g., pyrrolyl, thienyl, furyl, indolyl, benzindolyl, naphthylindolyl, isoindolyl, benzisoindolyl, naphthylisoindolyl, benzosilolyl, benzothienyl, benzofuryl, carbazolyl, dibenzosilolyl, dibenzothienyl, dibenzofuryl, indeno - carbazolyl, indolo - carbazolyl, benzofuro - carbazolyl, benzothieno - carbazolyl, benzosilolo - carbazolyl, benzindolo - carbazolyl, benzocarbazolyl, benzonaphthofuryl, benzonaphthothienyl, benzonaphthosilolyl, benzofuro - dibenzofuryl, benzofuro - dibenzothienyl, benzothieno - dibenzothienyl, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, benzopyrazolyl, benzimidazolyl, benzoxazolyl, benzisoxazolyl, benzothiazolyl, benzisothiazolyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolinyl, isoquinolinyl, benzoquinolinyl, benzoisoquinolinyl, quinoxalinyl, benzoquinoxalinyl, quinazolinyl, benzoquinazolinyl, phenanthrolinyl, cinnolinyl, phthalazinyl, naphthyridinyl, imidazopyridyl, imidazopyrimidinyl, imidazotriazinyl, imidazopyrazinyl, imidazopyridazinyl, azacarbazolyl, azafuryl, azadibenzosilolyl, azadibenzothienyl, azadibenzofuryl, etc.),

[0407] π - electron - rich C 3 -C 60 The cyclic group may be a T1 group, a group in which two or more T1 groups are fused to each other, a T3 group, a group in which two or more T3 groups are fused to each other, or a group in which at least one T3 group and at least one T1 group are fused to each other (e.g., C 3 -C 60 a carbocyclic group, 1H - pyrrolyl, silolyl, borolyl, 2H - pyrrolyl, 3H - pyrrolyl, thiophenyl, furyl, indolyl, benzoindolyl, naphthoindolyl, isoindolyl, benzoisoindolyl, naphthoisoindolyl, benzosilolyl, benzothiophenyl, benzofuryl, carbazolyl, dibenzosilolyl, dibenzothiophenyl, dibenzofuryl, indocarbazolyl, indolocarbazolyl, benzofurocarbazolyl, benzothiophenocarbazolyl, benzosilolocarbazolyl, benzoindolocarbazolyl, benzocarbazolyl, benzonaphthofuryl, benzonaphthothiophenyl, benzonaphthosilolyl, benzofurodibenzofuryl, benzofurodibenzothiophenyl, benzothiophenodibenzothiophenyl, etc.),

[0408] π - electron - deficient nitrogen - containing C 1 -C 60 The cyclic group may be a T4 group, a group in which two or more T4 groups are fused to each other, a group in which at least one T4 group and at least one T1 group are fused to each other, a group in which at least one T4 group and at least one T3 group are fused to each other, or a group in which at least one T4 group, at least one T1 group and at least one T3 group are fused to each other (e.g., pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, benzopyrazolyl, benzimidazolyl, benzoxazolyl, benzisoxazolyl, benzothiazolyl, benzisothiazolyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolinyl, isoquinolinyl, benzoquinolinyl, benzoisoquinolinyl, quinoxalinyl, benzoquinoxalinyl, quinazolinyl, benzoquinazolinyl, phenanthrolinyl, cinnolinyl, phthalazinyl, naphthyridinyl, imidazopyridyl, imidazopyrimidinyl, imidazotriazinyl, imidazopyrazinyl, imidazopyridazinyl, azacarbazolyl, azafuryl, azadibenzosilolyl, azadibenzothiophenyl, azadibenzofuryl, etc.).

[0409] The T1 group may be cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclobutenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cyclohexadienyl, cycloheptenyl, adamantyl, norbornyl (or bicyclo[2.2.1]heptanyl), norbornenyl, bicyclo[1.1.1]pentanyl, bicyclo[2.1.1]hexanyl, bicyclo[2.2.2]octanyl or phenyl,

[0410] The T2 group can be a furyl group, a thienyl group, a 1H-pyrrolyl group, a silolyl group, a borolyl group, a 2H-pyrrolyl group, a 3H-pyrrolyl group, an imidazolyl group, a pyrazolyl group, a triazolyl group, a tetrazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an aza-silolyl group, an aza-borolyl group, a pyridyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a tetrazinyl group, a pyrrolidinyl group, an imidazolidinyl group, a dihydropyrrolyl group, a piperidyl group, a tetrahydropyridyl group, a dihydropyridyl group, a hexahydropyrimidinyl group, a tetrahydropyrimidinyl group, a dihydropyrimidinyl group, a piperazinyl group, a tetrahydropyrazinyl group, a dihydropyrazinyl group, a tetrahydropyridazinyl group or a dihydropyridazinyl group.

[0411] The T3 group can be a furyl group, a thienyl group, a 1H-pyrrolyl group, a silolyl group or a borolyl group, and

[0412] The T4 group can be a 2H-pyrrolyl group, a 3H-pyrrolyl group, an imidazolyl group, a pyrazolyl group, a triazolyl group, a tetrazolyl group, an oxazolyl group, an isoxazolyl group, an oxadiazolyl group, a thiazolyl group, an isothiazolyl group, a thiadiazolyl group, an aza-silolyl group, an aza-borolyl group, a pyridyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group or a tetrazinyl group.

[0413] 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" and "nitrogen-containing π-electron-deficient C 1 -C 60 cyclic group" can each be a group fused to any cyclic group, monovalent group or polyvalent group (e.g., divalent group, trivalent group, tetravalent group, etc.) according to the structure of the formula using the corresponding term. For example, "phenyl" can be a benzo group, a phenyl group or a phenylene group, etc., which can be easily understood by those of ordinary skill in the art according to the structure of the formula including "phenyl".

[0414] Examples of monovalent C 3 -C 60 carbocyclic groups and monovalent C 1 -C 60 heterocyclic groups can include 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, C 1-C 60 Heteroaryl, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups. Divalent C 3 -C 60 Carbocyclic groups and divalent C 1 -C 60 Examples of heterocyclic groups may include C 3 -C 10 Subcycloalkyl, C 1 -C 10 Subheterocycloalkyl, C 3 -C 10 Subcycloalkenyl, C 1 -C 10 Subheterocycloalkenyl, C 6 -C 60 Subaryl, C 1 -C 60 Subheteroaryl, divalent non-aromatic fused polycyclic groups, and divalent non-aromatic fused heteropolycyclic groups.

[0415] As used herein, the term "C 1 -C 60 -alkyl" may be a straight-chain or branched-chain monovalent aliphatic hydrocarbon group having 1 to 60 carbon atoms, and examples thereof may include 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. As used herein, the term "C 1 -C 60 -alkylene" may be a divalent group having the same structure as C 1 -C 60 -alkyl.

[0416] As used herein, the term "C 2 -C 60 -alkenyl" may be a monovalent hydrocarbon group having at least one carbon-carbon double bond in the middle or at the end of C 2 -C 60 -alkyl, and examples thereof may include vinyl, propenyl, and butenyl. As used herein, the term "C 2 -C 60 -alkenylene" may be a divalent group having the same structure as C 2 -C 60 -alkenyl.

[0417] As used herein, the term "C 2 -C 60 -alkynyl" may be in C 2 -C60 A monovalent hydrocarbon group having at least one carbon-carbon triple bond in the middle or at the end of the alkyl group, and examples thereof may include ethynyl and propynyl. As used herein, the term "C 2 -C 60 alkynylene" may be a divalent group having the same structure as C 2 -C 60 alkynyl.

[0418] As used herein, the term "C 1 -C 60 alkoxy" may be a monovalent group represented by -O(A 101 )(where A 101 may be C 1 -C 60 alkyl), and examples thereof may include methoxy, ethoxy, and isopropoxy.

[0419] As used herein, the term "C 3 -C 10 cycloalkyl" may be a monovalent saturated hydrocarbon monocyclic group including 3 to 10 carbon atoms. Examples of C 3 -C 10 cycloalkyl may include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornyl (bicyclo[2.2.1]heptyl), bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, or bicyclo[2.2.2]octyl. As used herein, the term "C 3 -C 10 cycloalkylene" may be a divalent group having the same structure as C 3 -C 10 cycloalkyl.

[0420] As used herein, the term "C 1 -C 10 heterocycloalkyl" may be a monovalent cyclic group having 1 to 10 carbon atoms and further including at least one heteroatom as a ring-forming atom in addition to carbon atoms, and examples thereof may include 1,2,3,4-oxadiazolyl, tetrahydrofuryl, and tetrahydrothienyl. As used herein, the term "C 1 -C 10 heterocycloalkylene" may be a divalent group having the same structure as C 1 -C 10 heterocycloalkyl.

[0421] As used herein, the term "C 3 -C 10"Cycloalkenyl" may be a monovalent cyclic group having 3 to 10 carbon atoms and having at least one carbon-carbon double bond in its ring structure and being non-aromatic, and examples thereof may include cyclopentenyl, cyclohexenyl, and cycloheptenyl. As used herein, the term "C 3 -C 10 "Subcycloalkenyl" may be a divalent group having the same structure as C 3 -C 10 cycloalkenyl.

[0422] As used herein, the term "C 1 -C 10 "Heterocycloalkenyl" may be a monovalent cyclic group having 1 to 10 carbon atoms, further including at least one heteroatom as a ring-forming atom in addition to carbon atoms, and having at least one double bond in its ring structure. C 1 -C 10 Examples of heterocycloalkenyl may include 4,5-dihydro-1,2,3,4-oxadiazolyl, 2,3-dihydrofuryl, and 2,3-dihydrothienyl. As used herein, the term "C 1 -C 10 "Subheterocycloalkenyl" may be a divalent group having the same structure as C 1 -C 10 heterocycloalkenyl.

[0423] As used herein, the term "C 6 -C 60 "Aryl" may be a monovalent group of a carbocyclic aromatic system having 6 to 60 carbon atoms, and as used herein, the term "C 6 -C 60 "Subaryl" may be a divalent group of a carbocyclic aromatic system having 6 to 60 carbon atoms. C 6 -C 60 Examples of aryl may include phenyl, pentacenyl, naphthyl, azulyl, indacenyl, acenaphthylenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, triphenylenyl, pyrenyl, 1,2-benzophenanthrenyl, perylenyl, pentaphenyl, heptacenyl, tetracenyl, picenyl, hexaphenyl, pentaphenyl, rubicenyl, corannulenyl, and ovalenyl. When C 6 -C 60 aryl and C 6 -C 60 subaryl each include two or more rings, the respective rings may be fused to each other.

[0424] As used herein, the term "C 1 -C 60 "Heteroaryl" may be a monovalent group of a heteroaromatic system having 1 to 60 carbon atoms and further including at least one heteroatom as a ring-forming atom in addition to carbon atoms. As used herein, the term "C 1 -C60 "Hetarylene" may be a divalent group of a heteroaromatic system having 1 to 60 carbon atoms and further including at least one heteroatom as a ring-forming atom in addition to carbon atoms. C 1 -C 60 Examples of heteroaryl may include pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolinyl, benzoquinolinyl, isoquinolinyl, benzoisoquinolinyl, quinoxalinyl, benzoquinoxalinyl, quinazolinyl, benzoquinazolinyl, cinnolinyl, phenanthrolinyl, phthalazinyl, and naphthyridinyl. When C 1 -C 60 heteroaryl and C 1 -C 60 each of hetarylene and -C- includes two or more rings, the respective rings may be fused to each other.

[0425] As used herein, the term "monovalent non-aromatic fused polycyclic group" may be a monovalent group having two or more rings fused to each other, with only carbon atoms as ring-forming atoms and having no aromaticity as a whole in its molecular structure (e.g., having 8 to 60 carbon atoms). Examples of the monovalent non-aromatic fused polycyclic group may include indenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, indenoanthryl, and indenoacenaphthylenyl. As used herein, the term "divalent non-aromatic fused polycyclic group" may be a divalent group having the same structure as the monovalent non-aromatic fused polycyclic group described above.

[0426] As used herein, the term "monovalent non-aromatic fused heteropolycyclic group" may be a monovalent group having two or more rings fused to each other, further including at least one heteroatom as a ring-forming atom in addition to carbon atoms, and having no aromaticity as a whole in its molecular structure (e.g., having 1 to 60 carbon atoms). Examples of the monovalent non-aromatic fused heteropolycyclic group may include pyrrolyl, thienyl, furyl, indolyl, benzindolyl, naphthylindolyl, isoindolyl, benzisoindolyl, naphthylisoindolyl, benzosilolyl, benzothienyl, benzofuryl, carbazolyl, dibenzosilolyl, dibenzothienyl, dibenzofuryl, azacarbazolyl, azafuryl, azadibenzosilolyl, azadibenzothienyl, azadibenzofuryl, pyrazolyl, imidazolyl, triazolyl, tetrazolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, oxadiazolyl, thiadiazolyl, benzopyrazolyl, benzimidazolyl, benzoxazolyl, benzothiazolyl, benzoxadiazolyl, benzothiadiazolyl, imidazopyridyl, imidazopyrimidinyl, imidazotriazinyl, imidazopyrazinyl, imidazopyridazinyl, indolocarbazolyl, indolocarbazolyl, benzofurocarbazolyl, benzothienocarbazolyl, benzosilolocarbazolyl, benzindolocarbazolyl, benzocarbazolyl, benzonaphthofuryl, benzonaphthothienyl, benzonaphthosilolyl, benzofurodibenzofuryl, benzofurodibenzothienyl, and benzothienodibenzothienyl. As used herein, the term "divalent non-aromatic fused heteropolycyclic group" may be a divalent group having the same structure as the above-described monovalent non-aromatic fused heteropolycyclic group.

[0427] As used herein, the term "C 6 -C 60 aryloxy" may be a group represented by -O(A 102 )(wherein A 102 may be C 6 -C 60 aryl), and as used herein, the term "C 6 -C 60 arylthio" may be a group represented by -S(A 103 )(wherein A 103 may be C 6 -C 60 aryl).

[0428] As used herein, the term "C 7 -C 60 aralkyl" may be a group represented by -(A 104 )(A 105 )(wherein A 104 may be C 1 -C 54 alkylene, and A 105 may be C 6 -C59 a group represented by (aryl), and as used herein, the term "C" 2 -C 60 heteroalkyl" may be represented by -(A 106 )(A 107 )(wherein A 106 may be C 1 -C 59 alkylene, and A 107 may be C 1 -C 59 heteroaryl).

[0429] In the specification, the group "R 10a " may be:

[0430] deuterium, -F, -Cl, -Br, -I, hydroxy, cyano or nitro;

[0431] each unsubstituted or substituted by the following 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, hydroxy, 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 any combination thereof;

[0432] each unsubstituted or substituted by the following C 3 -C 60Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 7 -C 60 Aralkyl or C 2 -C 60 Heteroaralkyl: deuterium, -F, -Cl, -Br, -I, hydroxy group, cyano group, nitro group, C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl group, C 1 -C 60 Alkoxy group, C 3 -C 60 Carbocyclic group, C 1 -C 60 Heterocyclic group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 7 -C 60 Aralkyl group, 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 any combination thereof; or

[0433] -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 ).

[0434] In the specification, Q 1 to Q 3 、Q 11 to Q 13 、Q 21 to Q 23 and Q 31 to Q 33 can each independently be: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxy; cyano; nitro; C 1 -C 60 alkyl; C 2 -C 60 alkenyl; C 2 -C 60 alkynyl; C 1 -C 60 alkoxy; or

[0435] each unsubstituted or substituted by the following C 3 -C 60 carbocyclic group, C 1 -C 60 heterocyclic group, C 7 -C 60 aralkyl or C 2 -C 60 heteroaralkyl: deuterium, -F, cyano, C 1 -C 60 alkyl, C 1 -C 60 alkoxy, phenyl, biphenyl or any combination thereof.

[0436] As used herein, the term "heteroatom" can be any atom other than carbon and hydrogen atoms. Examples of heteroatoms can include O, S, N, P, Si, B, Ge, Se and any combination thereof.

[0437] As used herein, the term "transition metal" can be hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum (Pt), gold (Au), etc.

[0438] In the specification, the term "Ph" refers to phenyl, the term "Me" refers to methyl, the term "Et" refers to ethyl, the term "iso-Pr" refers to isopropyl, the term "tert-Bu" and "Bu t " each refer to tert-butyl, and the term "OMe" refers to methoxy.

[0439] As used herein, the term "biphenyl" can be "phenyl-substituted phenyl". For example, "biphenyl" can be a substituted phenyl having C 6 -C 60 aryl as a substituent.

[0440] As used herein, the term "terphenyl" may be "phenyl substituted with biphenyl". For example, "terphenyl" may be a phenyl having C 6 -C 60 aryl substituted C 6 -C 60 aryl as a substituent.

[0441] The number of carbon atoms described in the above definitions is only an example. For example, in C 1 -C 60 alkyl, the maximum number of carbon atoms 60 is only an example, and the definition for alkyl can also be applied to C 1 -C 20 alkyl. This also applies to the definitions of other groups as described above.

[0442] Unless otherwise defined, the symbols * and *' as used herein each refer to the binding site to the adjacent atom in the corresponding formula.

[0443] Hereinafter, the compounds and light-emitting devices according to the embodiments will be described in detail with reference to Comparative Examples and Examples.

[0444] [Comparative Examples and Examples]

[0445] Manufacture of Light-Emitting Device

[0446] Comparative Example 1

[0447] A light-emitting device was manufactured by depositing materials on an ITO electrode (50 mm × 50 mm × 0.5 mm) as an anode to have a structure of hole injection layer (NPD: 30 nm) / hole transport layer (Compound HT3: 20 nm) / electron blocking layer (CzSi: 10 nm) / emission layer (first host: second host + phosphorescent dopant + delayed fluorescence dopant: ) / hole blocking layer (TSPO1: 20 nm) / electron transport layer (TPBi: 30 nm) / electron injection layer (Liq: 1 nm) / cathode (Al: 300 nm).

[0448] The first host (hole transport host) was Compound HT-01, and the second host (electron transport host) was Compound ET-01, with a weight ratio of 6:4, the phosphorescent dopant (first dopant) was Compound 1 (10 wt%), and the delayed fluorescence dopant (second dopant) was Compound D-01 (1.0 wt%).

[0449] When forming the emission layer, the host and dopants were added to each material source and evaporated, and the substrate was fixed rather than scanned during the formation of the emission layer.

[0450] The concentration distribution of each compound according to the thickness of the emission layer is shown in Figure 4A .

[0451]

[0452]

[0453] Comparative Example 2

[0454] An illuminating device was fabricated in substantially the same manner as in Comparative Example 1, except that an ITO electrode (370 mm × 470 mm × 0.5 mm) was used, and when forming the emission layer, the substrate was scanned while evaporating the first host, the second host, the phosphorescent dopant, and the delayed fluorescence dopant from a material source including the host and the dopant at the same ratio as in Comparative Example 1.

[0455] In Comparative Example 2, the order of depositing the material source was changed. The weight percentage of the first host was adjusted to increase from the interface of the emission layer toward the center of the emission layer, and the weight percentage of the second host was adjusted to decrease from the interface of the emission layer toward the center of the emission layer.

[0456] The weight percentage of the phosphorescent dopant was adjusted to first increase and then decrease from the interface of the emission layer toward the center of the emission layer. The weight percentage of the delayed fluorescence dopant was adjusted to first increase and then decrease from the interface of the emission layer toward the center of the emission layer.

[0457] The concentration distribution of each compound according to the thickness of the emission layer is shown in Figure 4B .

[0458] Example 1

[0459] An illuminating device was fabricated in substantially the same manner as in Comparative Example 1, except that an ITO electrode (370 mm × 470 mm × 0.5 mm) was used, and when forming the emission layer, the substrate was scanned while evaporating the first host, the second host, the phosphorescent dopant, and the delayed fluorescence dopant from a material source including the host and the dopant at the same ratio as in Comparative Example 1.

[0460] In Example 1, the order of depositing the material source was changed. The weight percentage of the first host was adjusted to first decrease, then increase, and then decrease again from the interface of the emission layer toward the center of the emission layer. The weight percentage of the second host was adjusted to first increase and then decrease from the interface of the emission layer toward the center of the emission layer.

[0461] The weight percentage of the phosphorescent dopant was adjusted to increase from the interface of the emission layer toward the center of the emission layer. The weight percentage of the delayed fluorescence dopant was adjusted to decrease from the interface of the emission layer toward the center of the emission layer.

[0462] The concentration distribution of each compound according to the thickness of the emission layer is shown in Figure 4C .

[0463] Comparative Example 3

[0464] A light-emitting device was fabricated in substantially the same manner as in Comparative Example 1, except that an ITO electrode (370 mm × 470 mm × 0.5 mm) was used, and when forming the emission layer, the substrate was scanned while evaporating the first host, the second host, the phosphorescent dopant, and the delayed fluorescence dopant from a material source including the host and the dopant at the same ratio as in Comparative Example 1.

[0465] In Comparative Example 3, the order of depositing the material source was changed. The weight percentage of the first host was adjusted to increase first and then decrease from the interface of the emission layer toward the center of the emission layer, and the weight percentage of the second host was adjusted to increase first and then decrease from the interface of the emission layer toward the center of the emission layer.

[0466] The weight percentage of the phosphorescent dopant was adjusted to decrease from the interface of the emission layer toward the center of the emission layer. The weight percentage of the delayed fluorescence dopant was adjusted to increase from the interface of the emission layer toward the center of the emission layer.

[0467] The concentration distribution of each compound according to the thickness of the emission layer is shown in Figure 4D .

[0468] To evaluate the characteristics of the light-emitting devices fabricated according to the comparative examples and Example 1, the efficiency, lifetime, etc. were measured at a current density of 10 mA / cm 2 , and the results are shown in Table 1.

[0469] The efficiency, etc. were measured using a measuring device C9920-2-12 of Hamamatsu Photonics Inc.

[0470] [Table 1]

[0471] Drive voltage (V) Efficiency (%) Lifetime (%) Comparative Example 1 - 100 100 Comparative Example 2 0.5 82 75 Example 1 0.0 102 102 Comparative Example 3 0.2 93 99

[0472] It can be understood from Table 1 that the light-emitting device of Example 1 has better efficiency and lifetime than the light-emitting devices of the comparative examples.

[0473] Even when the deposition distribution is changed, the light-emitting device according to the embodiment can exhibit improved efficiency and lifetime.

[0474] Embodiments have been disclosed herein, and although terms are employed, they are used and interpreted in a general and descriptive sense only and not for purposes of limitation. In some instances, as will be apparent to those of ordinary skill in the art, features, characteristics and / or elements described in connection with an embodiment may be used singly or in combination with features, characteristics and / or elements described in connection with other embodiments, unless specifically indicated otherwise. Accordingly, those of ordinary skill in the art will understand that various changes in form and detail may be made without departing from the spirit and scope of the present disclosure.

Claims

1. A light emitting device, comprising: a first electrode; a second electrode facing the first electrode; as well as a layer between the first electrode and the second electrode, wherein The interlayer includes an emitting layer, The emission layer includes a host, a first dopant, and a second dopant, The weight percentage of the first dopant is greater than the weight percentage of the second dopant, and The weight percentage of the first dopant increases from an interface of the emission layer toward a center of the emission layer.

2. The light emitting device according to claim 1, wherein The first electrode is an anode, The second electrode is a cathode, The interlayer further comprises: a hole transport region between the first electrode and the emissive layer; or an electron transport region between the second electrode and the emission layer, The hole transport region includes a hole injection layer, a hole transport layer, an electron blocking layer or any combination thereof, and The electron transport region includes an electron transport layer, an electron injection layer, a hole blocking layer or any combination thereof. 3 . The light emitting device of claim 1 , wherein a weight percentage of the host and a weight percentage of the second dopant each independently vary according to a thickness of the emission layer. 4 . The light emitting device of claim 1 , wherein the weight percentage of the second dopant decreases from the interface of the emission layer toward the center of the emission layer. The light emitting device according to claim 1 , wherein the first dopant comprises a phosphorescent dopant. The light emitting device according to claim 1 , wherein the second dopant comprises a fluorescent dopant or a delayed fluorescent dopant. The light-emitting device according to claim 1 , wherein the host comprises an electron transport host and a hole transport host. 8 . The light-emitting device according to claim 7 , wherein a ratio of the weight percentage of the hole transport host to the weight percentage of the electron transport host is in a range of 9:1 to 5.1:4.

9.

9. The light emitting device according to claim 1, wherein: The weight percentage of the first dopant is in a range of 3 wt % to 20 wt % based on the total weight of the emission layer.

10. The light emitting device according to claim 1, wherein: The weight percentage of the second dopant is in a range of 0.1 wt % to 2 wt % based on the total weight of the emission layer.

11. The light-emitting device according to claim 7, wherein the hole transport host comprises a compound represented by Formula 301-1, a compound represented by Formula 301-2, or any combination thereof: Formula 301-1 Formula 301-2 In Formula 301-1 and Formula 301-2, Ring A 301 To Ring A 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, 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, 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 ),and xb1 to xb4 are each independently an integer selected from 0 to 5, 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 any 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 Q 11 To Q 13 , Q 21 To Q 23 , Q 31 To Q 33 and Q 301 To Q 303 Each independently represents: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C1-C 60 Alkyl; C2-C 60 Alkenyl; C2-C 60 Alkynyl; C1-C 60 Alkoxy; or each unsubstituted or substituted 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 any combination thereof.

12. The light-emitting device according to claim 7, wherein the electron transport host comprises a compound represented by Formula 1: Formula 1 In formula 1, Ring Ar3 to Ring Ar5 are each independently C5-C 60 Carbocyclic or C1-C 60 Heterocyclic group, E is N or C(R"6), F is N or C(R"7), G is N or C(R"8), R3 to R8 are each independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxy, cyano, nitro, unsubstituted or substituted with 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 10 Cycloalkyl, unsubstituted or substituted with at least one R 10a Substituted C1-C 10 Heterocycloalkyl, unsubstituted or substituted with at least one R 10a Substituted C3-C 10 Cycloalkenyl, unsubstituted or substituted with at least one R 10a Substituted C1-C 10 Heterocycloalkenyl, unsubstituted or substituted with at least one R 10a Substituted C6-C 60 Aryl, unsubstituted or substituted with at least one R 10a Substituted C6-C 60 Aryloxy, unsubstituted or substituted with at least one R 10a Substituted C6-C 60 Arylthio, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heteroaryl, unsubstituted or substituted with at least one R 10a Replaced C8-C 60 A monovalent non-aromatic fused polycyclic group, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 a monovalent non-aromatic fused heteropolycyclic group, -Si(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2), b'3 to b'5 are each independently an integer selected from 1 to 5, When b"3 is 2 or more, multiple R"3 are the same or different from each other, When b"4 is 2 or more, a plurality of R"4 are the same as or different from each other, and When b"5 is 2 or more, multiple R"5 are the same as or different from each other, Two or more adjacent substituents in R"3 to R"8 are optionally bonded to each other to form an unsubstituted or substituted group. 10a Substituted C5-C 60 The carbocyclic group is either unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heterocyclic group, 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 any 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 represents: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C1-C 60 Alkyl; C2-C 60 Alkenyl; C2-C 60 Alkynyl; C1-C 60 Alkoxy; or Each unsubstituted or substituted 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 any combination thereof.

13. The light emitting device according to claim 1, wherein the first dopant comprises an organic metal compound represented by Formula 401: Formula 401 M(L 401 ) xc1 (L 402 ) xc2 Formula 402 In equations 401 and 402, M is a transition metal, L 401 is a ligand represented by formula 402, xc1 is 1, 2 or 3, wherein 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, wherein 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 chemical 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 ), 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 any 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 ), 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 represents: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C1-C 60 Alkyl; C2-C 60 Alkenyl; C2-C 60 Alkynyl; C1-C 60 Alkoxy; or each unsubstituted or substituted 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 any combination thereof, xc11 and xc12 are each independently an integer selected from 0 to 10, and * and *' in Formula 402 each indicate a bonding site to M in Formula 401.

14. The light-emitting device according to claim 1, wherein the second dopant comprises a compound represented by Formula 501 or Formula 2: Formula 501 Wherein in Formula 501, Ar 501 , L 501 To L 503 , R 501 and R 502 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 0, 1, 2 or 3, and xd4 is 1, 2, 3, 4, 5 or 6 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 any 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 Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 Each independently represents: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C1-C 60 Alkyl; C2-C 60 Alkenyl; C2-C 60 Alkynyl; C1-C 60 Alkoxy; or each unsubstituted or substituted 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 any combination thereof; Formula 2 In Formula 2, Y1 to Y3 are each independently S, N (R 24 )、B(R 24 )、C(R 24 )(R 25 ) or Si(R 24 )(R 25 ), c is 0 or 1, A 11 To A 13 Each independently is C5-C 30 Carbocyclic or C1-C 30 Heterocyclic group, R 21 To R 25 Each is independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amino, amidino, hydrazine, hydrazone, carboxylic acid or its salt, sulfonic acid or its salt, phosphate or its salt, 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 10 Cycloalkyl, unsubstituted or substituted with at least one R 10a Substituted C1-C 10 Heterocycloalkyl, unsubstituted or substituted with at least one R 10a Substituted C3-C 10 Cycloalkenyl, unsubstituted or substituted with at least one R 10a Substituted C1-C 10 Heterocycloalkenyl, unsubstituted or substituted with at least one R 10a Substituted C6-C 60 Aryl, unsubstituted or substituted with at least one R 10a Substituted C6-C 60 Aryloxy, unsubstituted or substituted with at least one R 10a Substituted C6-C 60 Arylthio, unsubstituted or substituted with at least one R 10a Substituted C1-C 60 Heteroaryl, unsubstituted or substituted with at least one R 10a A substituted monovalent non-aromatic fused polycyclic group, unsubstituted or replaced by at least one R 10a a substituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1), or -P(=O)(Q1)(Q2), R 21 To R 25 are optionally bonded to each other to form an unsubstituted or substituted R 10a Substituted C5-C 30 A carbocyclic group and unsubstituted or substituted with at least one R 10a Substituted C1-C 30 Heterocyclic group, a21 to a23 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 any 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 represents: hydrogen; deuterium; -F; -Cl; -Br; -I; hydroxyl; cyano; nitro; C1-C 60 Alkyl; C2-C 60 Alkenyl; C2-C 60 Alkynyl; C1-C 60 Alkoxy; or each unsubstituted or substituted 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 any combination thereof. The light emitting device according to claim 1 , wherein the emission layer emits blue light.

16. An electronic device comprising the light emitting device according to any one of claims 1 to 15.

17. The electronic device according to claim 16, further comprising: Thin film transistors, where The thin film transistor includes a source electrode and a drain electrode, and The first electrode of the light emitting device is electrically connected to the source electrode or the drain electrode.

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