Compound, quantum dots coordinated thereby, composition containing the same, and electronic device manufactured using the same

Abstract

Dithio C 1 -C 16 A linking moiety containing an alkyl moiety, a hydrophilic linking moiety containing oxygen, and unsubstituted C 6 -C 40 An aryl group, unsubstituted C 2 -C 10 An alkyl group, and / or unsubstituted C 7 -C 50 A compound is provided that includes a terminal portion containing an arylalkyl group. The linking moiety and the linking portion are linked by an ester bond, and the terminal portion is linked to the linking portion.

Description

Technical Field

[0001] The present invention relates to a compound, a quantum dot coordinated therewith, a composition containing the same, and an electronic device manufactured using the same.

Background Art

[0002] A quantum dot is a nanocrystal of a semiconductor material and exhibits a quantum confinement effect. When the quantum dot receives light from an excitation source and reaches an energy-excited state, it emits energy corresponding to the corresponding energy band gap. At this time, even in the case of the same substance, since the wavelength changes depending on the particle size, by adjusting the size of the quantum dot, light in a desired wavelength region can be obtained, and characteristics such as excellent color purity and high luminous efficiency can be exhibited. Therefore, it can be applied to various elements.

[0003] Due to the quantum confinement effect, quantum dots can realize various hues by adjusting the particle size and have excellent light-emitting characteristics.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The problem to be solved by the present invention is to provide a novel ligand compound for quantum dots, a quantum dot coordinated therewith, a composition containing the same, an electronic device manufactured using the same, and the like.

Means for Solving the Problems

[0005] According to one aspect, a bonding part containing a dithio C 1 -C 16 alkyl moiety, a hydrophilic linking part containing oxygen, and an unsubstituted C 6 -C 40An aryl group, an unsubstituted C 2 -C 10 alkyl group, and / or an unsubstituted C 7 -C 40 terminal portion containing an arylalkyl group, A compound containing the same is provided.

[0006] The bonding portion and the linking portion are linked by an ester bond, and the terminal portion is linked to the linking portion.

[0007] According to another aspect, Quantum dots coordinated with the compound are provided.

[0008] According to still another aspect, The quantum dots, A composition containing a crosslinkable monomer is provided.

[0009] According to still another aspect, A light-emitting device including a first electrode, a second electrode facing the first electrode, and an intermediate layer interposed between the first electrode and the second electrode and including a light-emitting layer, A thin-film transistor, A color conversion layer and / or a color filter, a touch screen layer, a polarizing layer, or any combination thereof, The thin-film transistor includes a source electrode and a drain electrode, The first electrode of the light-emitting device is electrically connected to the source electrode or the drain electrode of the thin-film transistor, An electronic device including a light-emitting layer, a color conversion layer and / or a color filter including a layer manufactured from the composition is provided.

Advantages of the Invention

[0010] An electronic device including a light-emitting device manufactured using a composition containing a ligand compound for quantum dots according to one embodiment is excellent in efficiency.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0012] As one method for realizing color in a display device, a method using a color filter that allows only light within a certain wavelength range to pass through the light emitted from the display has been widely used. In recent years, a method has been proposed in which a color conversion luminescent material that absorbs light of a specific wavelength and emits it as light of another wavelength is combined with a color filter to further increase the color purity of the three primary colors of light: red, green, and blue.

[0013] In order to form a color conversion layer containing quantum dots, the quantum dots must be well dispersed in a resin polymer or monomer that is a constituent of an ink or a photoresist composition.

[0014] Normally, the manufactured quantum dots have a ligand layer on the surface, and immediately after manufacture, the ligand layer consists of oleic acid and lauric acid.

[0015] However, since the ligand has a molecular structure composed of non-polar hydrocarbons except for the carboxylic acid functional group that is the surface bonding part of the quantum dot, it is well dispersed in unsaturated hydrocarbon solvents such as n-hexane, aromatic solvents such as chloroform and benzene, but has poor dispersibility in polar solvents such as propylene glycol methyl ether acetate and polar monomers such as (poly)acrylic acid.

[0016] The compound according to one aspect is Dithio C 1 -C 16 a bonding part containing an alkyl moiety, a hydrophilic linking part containing oxygen, Unsubstituted C 6 -C 40 Aryl group, unsubstituted C 2 -C 10 Alkyl group, and / or unsubstituted C 7 -C 40 Including a terminal portion containing an arylalkyl group, The bonding portion and the linking portion are linked by an ester bond, and the terminal portion is linked to the linking portion.

[0017] The dithio C contained in the bonding portion 1 -C 16 The alkyl moiety refers to an alkyl group having 1 to 16 carbon atoms to which two thiol groups are linked.

[0018] The ester bond refers to a -COO- bond. For example, the compound according to an embodiment of the present invention can have a structure of bonding portion -COO- linking portion - terminal portion.

[0019] The bonding portion of the compound according to an embodiment of the present invention has two thiol groups. Therefore, it has excellent quantum dot bonding properties.

[0020] The linking portion of the compound according to an embodiment of the present invention is hydrophilic and contains oxygen, so it has good miscibility with polar monomers.

[0021] On the other hand, the terminal portion of the compound according to an embodiment of the present invention does not have a cross-linking function.

[0022] The compound according to one aspect is Dithio C 1 -C 16 A bonding portion containing an alkyl moiety, A hydrophilic linking portion containing oxygen, Unsubstituted C 6 -C 40 Aryl group, unsubstituted C 3 -C 50 Heteroaryl group, unsubstituted C 2 -C 10 Alkyl group, unsubstituted C 7 -C 40It includes a terminal portion containing an arylalkyl group, a monovalent non-aromatic condensed polycyclic group, or a monovalent non-aromatic hetero-condensed polycyclic group. The bonding portion and the linking portion are linked by an ester bond, and the terminal portion is linked to the linking portion.

[0023] The compound according to one embodiment of the present invention can act as a ligand to coordinate quantum dots. In the compound according to one embodiment of the present invention, two thiol groups of the bonding portion coordinate to the quantum dots. In the coordination bond between the quantum dots and the thiol groups, it can be said that the bond between the quantum dots and the thiol groups is in a dynamic state of repeating formation and cleavage.

[0024] If there is only one thiol group, it is difficult for the bond between the quantum dots and the thiol group to be regenerated once the bond between the quantum dots and the thiol group is cleaved and the distance between the quantum dots and the thiol group becomes long.

[0025] When there are two thiol groups (for example, thiol group A and thiol group B), if the bond between the quantum dots and one thiol group A is cleaved but the other thiol group B maintains the bond with the quantum dots, the bond of the thiol group A whose bond with the quantum dots has been cleaved is likely to be regenerated again. This is because the thiol group B is linked to the thiol group A and the distance between the quantum dots and the thiol group A does not become too long.

[0026] The quantum dots coordinated by the compound according to one embodiment of the present invention have a hydrophilic linking portion and thus can be well dispersed by polar monomers.

[0027] On the other hand, in the quantum dots coordinated by the compound according to one embodiment of the present invention, the terminal portion of the compound is located on the outermost side and the terminal portion does not have a cross-linking function.

[0028] Therefore, when the quantum dots coordinated by the compound according to one embodiment of the present invention are mixed with a cross-linkable monomer and cross-linked, the quantum dots have some fluidity within the matrix.

[0029] For example, the compound is represented by the following Chemical Formula 1.

[0030] [Chemical Formula 1] JPEG2025517059000002.jpg42170

[0031] In the Chemical Formula 1, A1 represents a C 1 -C 16 alkyl moiety, A2 represents a hydrophilic linker, A3 represents a terminal portion.

[0032] According to one embodiment, the alkyl of the dithio C 1 -C 16 alkyl moiety can be a straight-chain structure or a branched structure. For example, the alkyl of the dithio C 1 -C 16 alkyl moiety can be a straight-chain structure.

[0033] According to one embodiment, in the dithio C 1 -C 16 alkyl moiety, one thiol group can be located at the terminal of the C 1 -C 16 alkyl moiety. For example, in the dithio C 1 -C 16 alkyl moiety, one thiol group is located at the terminal of the C 1 -C 16 alkyl moiety, and the remaining one thiol group can be located at other positions except the terminal of the alkyl chain.

[0034] According to one embodiment, 2 to 5 carbons can be present between the two thiol groups of the dithio C 1 -C 16 alkyl moiety. For example, 2 or 3 carbons can be present between the two thiol groups of the dithio C 1 -C 16 alkyl moiety.

[0035] According to one embodiment, the hydrophilic linking group containing oxygen can be a linking group containing ethylene glycol units and / or propylene glycol units. For example, the ethylene glycol units and / or propylene glycol units can each independently be 1 to 10 in number.

[0036] According to one embodiment, the unsubstituted C 6 -C 40 aryl group may include a phenyl group, a pentalenyl group, a naphthyl group, an azulenyl group, an indacenyl group, an acenaphthyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a heptalenyl group, a naphthacenyl group, a picenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, or any combination thereof.

[0037] According to one embodiment, the unsubstituted C 2 -C 10 alkyl group may include an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, an isobutyl group, a tert-butyl group, an n-pentyl group, a tert-pentyl group, a neopentyl group, an isopentyl group, a sec-pentyl group, a 3-pentyl group, a sec-isopentyl group, an n-hexyl group, an isohexyl group, a sec-hexyl group, a tert-hexyl group, an n-heptyl group, an isoheptyl group, a sec-heptyl group, a tert-heptyl group, an n-octyl group, an isooctyl group, a sec-octyl group, a tert-octyl group, an n-nonyl group, an isononyl group, a sec-nonyl group, a tert-nonyl group, an n-decyl group, an isodecyl group, a sec-decyl group, a tert-decyl group, or any combination thereof.

[0038] The unsubstituted C 7 -C 50 arylalkyl group is -A 104 A 105 (where A 104 is C 1 -C 10an alkylene group, A 105 is C 6 -C 40 is an aryl group). Refer to the following description for the alkylene group.

[0039] According to one embodiment, the compound may include any one of the following compounds:

[0040] JPEG2025517059000003.jpg208170JPEG2025517059000004.jpg220170JPEG2025517059000005.jpg201170

[0041] The quantum dots according to another aspect are the quantum dots coordinated with the compound.

[0042] For example, by having two thiol groups at the bonding part, the compound increases the binding force between the compound and the quantum dots, and increases the stability of the quantum dots.

[0043] The composition according to another aspect is the quantum dots, a crosslinkable monomer, and includes.

[0044] According to one embodiment, the composition may further include a photoinitiator.

[0045] The ratio of the quantum dots and the monomer can be 1:0.5 to 1:2% by weight.

[0046] For example, the photoinitiator may include diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, 4-acryloxybenzophenone, 2,2-dimethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenyl-1-propan-1-one, ethyl(2,4,6-trimethylbenzoyl)phenylphosphinate, bisacrylphosphine oxide, or any combination thereof.

[0047] According to one embodiment, the crosslinkable monomer can be an acrylic monomer.

[0048] For example, the crosslinkable monomer may include 1,6 - hexanediol diacrylate, 2 - ethylhexyl (meth)acrylate, ethyl (meth)acrylate, methyl (meth)acrylate, n - propyl (meth)acrylate, isopropyl (meth)acrylate, pentyl (meth)acrylate, n - octyl (meth)acrylate, isooctyl (meth)acrylate, isononyl (meth)acrylate, n - butyl (meth)acrylate, isobutyl (meth)acrylate, n - hexyl (meth)acrylate, n - nonyl (meth)acrylate, isoamyl (meth)acrylate, n - decyl (meth)acrylate, isodecyl (meth)acrylate, dodecyl (meth)acrylate, isobornyl (meth)acrylate, cyclohexyl (meth)acrylate, phenyl (meth)acrylate, benzyl (meth)acrylate, isostearyl (meth)acrylate, 2 - methylbutyl (meth)acrylate, or any combination thereof.

[0049] Quantum dots are spherical semiconductor nanomaterials having a size of several to several hundred nm, and include a core composed of a material with a small bandgap and a shell arranged to cover the core.

[0050] According to one embodiment, the quantum dot can have a core - shell structure including a core containing a semiconductor compound and a shell containing a metal, metalloid or non - metal oxide, semiconductor compound, or a combination thereof.

[0051] The semiconductor compound, metal, metalloid or non - metal oxide will be described later.

[0052] According to one embodiment, the viscosity (@25°C) of the composition can be 2 to 30 cP.

[0053] When the viscosity is within the above range, a composition according to an embodiment of the present invention can be used to form a layer using a solution process, for example, spin coating or inkjet printing.

[0054] [Description regarding FIG. 1] FIG. 1 schematically shows a cross-sectional view of a light-emitting element 10 according to an embodiment of the present invention. The light-emitting element 10 includes a first electrode 110, an intermediate layer 130, and a second electrode 150.

[0055] Hereinafter, with reference to FIG. 1, the structure and manufacturing method of the light-emitting element 10 according to an embodiment of the present invention will be described.

[0056] [First electrode 110] A substrate may be further disposed below the first electrode 110 in FIG. 1 or above the second electrode 150. As the substrate, a glass substrate or a plastic substrate can be used. Alternatively, the substrate is a flexible substrate and may include, for example, a plastic excellent in heat resistance and durability such as polyimide, polyethylene terephthalate (PET), polycarbonate, polyethylene naphthalate, polyarylate (PAR), polyetherimide, or any combination thereof.

[0057] The first electrode 110 is formed, for example, by providing a first electrode material on the upper part of the substrate using a vapor deposition method or a sputtering method. When the first electrode 110 is an anode, a high work function material that facilitates hole injection can be used as the first electrode material.

[0058] The first electrode 110 can be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode. In order to form the first electrode 110 as a transmissive electrode, indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO 2) Zinc oxide (ZnO), or any combination thereof can be used. Alternatively, to form the first electrode 110 which is a semi-transmissive electrode or a reflective electrode, as a material for the first electrode, magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), or any combination thereof can be used.

[0059] The first electrode 110 can have a single-layer structure consisting of a single layer or a multilayer structure including a plurality of layers. For example, the first electrode 110 can have a three-layer structure of ITO / Ag / ITO.

[0060] [Intermediate layer 130] An intermediate layer 130 is disposed on top of the first electrode 110. The intermediate layer 130 includes a light-emitting layer.

[0061] The intermediate layer 130 may further include a hole transport region disposed between the first electrode 110 and the light-emitting layer, and an electron transport region disposed between the light-emitting layer and the second electrode 150.

[0062] In addition to various organic substances, the intermediate layer 130 may further include a metal-containing compound such as an organometallic compound, an inorganic substance such as a quantum dot, etc.

[0063] On the other hand, the intermediate layer 130 may include i) two or more emitting units sequentially stacked between the first electrode 110 and the second electrode 150, and ii) a charge generation layer disposed between the two emitting units. When the intermediate layer 130 includes the emitting units and the charge generation layer as described above, the light-emitting device 10 can be a tandem light-emitting device.

[0064] [Hole transport region in the intermediate layer 130] The hole transport region can have a monolayer structure consisting of a single layer of a single substance, ii) a monolayer structure consisting of a single layer containing a plurality of different substances from each other, or iii) a multilayer structure containing a plurality of layers containing a plurality of different substances from each other.

[0065] The hole transport region may include a hole injection layer, a hole transport layer, a light emission auxiliary layer, an electron blocking layer, or any combination thereof.

[0066] For example, the hole transport region can have a multilayer structure of a hole injection layer / hole transport layer, a hole injection layer / hole transport layer / light emission auxiliary layer, a hole injection layer / light emission auxiliary layer, a hole transport layer / light emission auxiliary layer, or a hole injection layer / hole transport layer / electron blocking layer laminated in order from the first electrode 110.

[0067] The hole transport region may include a compound represented by the following chemical formula 201, a compound represented by the following chemical formula 202, or any combination thereof:

[0068] [Chemical formula 201] JPEG2025517059000006.jpg28170

[0069] [Chemical formula 202] JPEG2025517059000007.jpg35170

[0070] In the chemical formulas 201 and 202, L 201 ~L 204 are, independently of each other, at least one R 10a substituted or unsubstituted C 3 -C 60 carbocyclic group, or at least one R 10a substituted or unsubstituted C 1 -C 60 heterocyclic group, and L 205 is *-O-*’, *-S-*’, *-N(Q 201 )-*’, at least one R 10aSubstituted or unsubstituted C 1 -C 20 an alkylene group, at least one R 10a Substituted or unsubstituted C 2 -C 20 an alkenylene group, at least one R 10a Substituted or unsubstituted C 3 -C 60 a carbocyclic group, or at least one R 10a Substituted or unsubstituted C 1 -C 60 is a heterocyclic group, xa1 to xa4 are each independently one of the integers from 0 to 5, xa5 is one of the integers from 1 to 10, R 201 ~R 204 and Q 201 are each independently at least one R 10a Substituted or unsubstituted C 3 -C 60 a carbocyclic group, or at least one R 10a Substituted or unsubstituted C 1 -C 60 is a heterocyclic group, R 201 and R 202 are optionally linked to each other via a single bond, at least one R 10a Substituted or unsubstituted C 1 -C 5 an alkylene group, or at least one R 10a Substituted or unsubstituted C 2 -C 5 an alkenylene group and are linked to each other, at least one R 10a Substituted or unsubstituted C 8 -C 60 can form a polycyclic group (e.g., a carbazole group, etc.) (see, for example, the following compound HT16, etc.), R 203 and R 204 are optionally linked to each other via a single bond, at least one R 10a Substituted or unsubstituted C 1 -C 5 an alkylene group, or at least one R10a Substituted or unsubstituted C 2 -C 5 Linked to each other via an alkenylene group, and at least one R 10a Substituted or unsubstituted C 8 -C 60 Can form a polycyclic group, na1 is one of the integers from 1 to 4.

[0071] For example, each of the chemical formulas 201 and 202 may contain at least one of the groups represented by the following chemical formulas CY201 to CY217:

[0072] JPEG2025517059000008.jpg97170

[0073] In the chemical formulas CY201 to CY217, R 10b and R 10c For the description of, refer to the description of R 10a in this specification respectively, and the rings CY 201 ~ring CY 204 Are, independently of each other, C 3 -C 20 A carbocyclic group or C 1 -C 20 A heterocyclic group, and in the chemical formulas CY201 to CY217, at least one hydrogen is substituted or unsubstituted with R 10a as described in this specification.

[0074] According to one embodiment, in the chemical formulas CY201 to CY217, the rings CY 201 ~ring CY 204 May, independently of each other, be a benzene group, a naphthalene group, a phenanthrene group, or an anthracene group.

[0075] According to another embodiment, each of the chemical formulas 201 and 202 may contain at least one of the groups represented by the chemical formulas CY201 to CY203.

[0076] According to still other embodiments, the chemical formula 201 may each contain at least one of the groups represented by the chemical formulas CY201 to CY203 and at least one of the groups represented by the chemical formulas CY204 to CY217.

[0077] According to still other embodiments, in the chemical formula 201, xa1 is 1, R 201 is a group represented by one of the chemical formulas CY201 to CY203, xa2 is 0, and R 202 may be a group represented by one of the chemical formulas CY204 to CY207.

[0078] According to still other embodiments, each of the chemical formulas 201 and 202 may not contain the group represented by the chemical formulas CY201 to CY203.

[0079] According to still other embodiments, each of the chemical formulas 201 and 202 does not contain the group represented by the chemical formulas CY201 to CY203 and may contain at least one of the groups represented by the chemical formulas CY204 to CY217.

[0080] As still another example, each of the chemical formulas 201 and 202 may not contain the group represented by the chemical formulas CY201 to CY217.

[0081] For example, the hole transport region may contain one of the following compounds HT1 to HT46, m-MTDATA, TDATA, 2-TNATA, NPB (NPD), β-NPB, TPD, Spiro-TPD, Spiro-NPB, methylated NPB, TAPC, HMTPD, 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:

[0082] JPEG2025517059000009.jpg 182 170 JPEG2025517059000010.jpg 187 170 JPEG2025517059000011.jpg 224 170 JPEG2025517059000012.jpg 252 170

[0083] The thickness of the hole transport region is from about 50 Å to about 10,000 Å, for example, from about 100 Å to about 4,000 Å. 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 is from about 100 Å to about 9,000 Å, for example, from about 100 Å to about 1,000 Å, and the thickness of the hole transport layer is from about 50 Å to about 2,000 Å, for example, from about 100 Å to about 1,500 Å. When the thicknesses of the hole transport region, the hole injection layer, and the hole transport layer satisfy the above ranges, hole transport characteristics to be satisfied can be obtained without a substantial increase in driving voltage.

[0084] The light-emission assisting layer is a layer that plays a role of compensating for the optical resonance distance according to the wavelength of light emitted from the light-emitting layer to increase the light-emission efficiency, and the electron blocking layer is a layer that plays a role of preventing electron leakage from the light-emitting layer to the hole transport region. Substances included in the above-mentioned hole transport region are also included in the light-emission assisting layer and the electron blocking layer.

[0085] [p-dopant] In addition to the substances as described above, the hole transport region may contain a charge generating substance for improving conductivity. The charge generating substance is uniformly or non-uniformly dispersed (for example, in the form of a single layer composed of the charge generating substance) in the hole transport region.

[0086] The charge generating substance can be, for example, a p-dopant.

[0087] For example, the LUMO energy level of the p-dopant can be -3.5 eV or less.

[0088] According to one embodiment, the p-dopant may include a quinone derivative, a cyano group-containing compound, a compound containing element EL1 and element EL2, or any combination thereof.

[0089] Examples of the quinone derivative may include TCNQ, F4-TCNQ, and the like.

[0090] Examples of the cyano group-containing compound may include HAT-CN, the compound represented by the following Chemical Formula 221, and the like.

[0091] JPEG2025517059000013.jpg46170

[0092] [Chemical Formula 221] JPEG2025517059000014.jpg40170

[0093] In Chemical Formula 221, R 221 ~R 223 are each independently a C 10a -C 3 carbon ring group which is substituted or unsubstituted with at least one R 60 or a C 10a -C 1 heterocyclic group which is substituted or unsubstituted with at least one R 60 and at least one of the R 221 ~R 223 is each independently a cyano group; -F; -Cl; -Br; -I; a C 1 -C 20 alkyl group substituted with a cyano group, -F, -Cl, -Br, -I, or any combination thereof; or a C 3 -C 60 carbon ring group or a C 1 -C 60 heterocyclic group which can be substituted with any combination thereof.

[0094] In the compound containing the element EL1 and the element EL2, the element EL1 is a metal, a metalloid, or a combination thereof, and the element EL2 is a nonmetal, a metalloid, or a combination thereof.

[0095] Examples of the metal 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.); 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.); and the like may be included.

[0096] Examples of the metalloid may include silicon (Si), antimony (Sb), tellurium (Te), and the like.

[0097] Examples of the nonmetal may include oxygen (O), halogens (e.g., F, Cl, Br, I, etc.), and the like.

[0098] For example, the compound containing the element EL1 and the element EL2 may include a metal oxide, a metal halide (e.g., metal fluoride, metal chloride, metal bromide, metal iodide, etc.), a metalloid halide (e.g., metalloid fluoride, metalloid chloride, metalloid bromide, metalloid iodide, etc.), a metal telluride, or any combination thereof.

[0099] Examples of the metal oxide 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 (MoO, Mo 2 O 3 、MoO 2 、MoO 3 、Mo 2 O 5 etc.), rhenium oxides (e.g., ReO 3 etc.), and the like.

[0100] Examples of the metal halide may include alkali metal halides, alkaline earth metal halides, transition metal halides, post-transition metal halides, lanthanide metal halides, and the like.

[0101] Examples of the alkali metal halide may include LiF, NaF, KF, RbF, CsF, LiCl, NaCl, KCl, RbCl, CsCl, LiBr, NaBr, KBr, RbBr, CsBr, LiI, NaI, KI, RbI, CsI, and the like.

[0102] Examples of the alkaline earth metal halide include BeF 2 、MgF 2 、CaF 2 、SrF 2 、BaF 2 、BeCl 2 、MgCl2 , CaCl 2 , SrCl 2 , BaCl 2 , BeBr 2 , MgBr 2 , CaBr 2 , SrBr 2 , BaBr 2 , BeI 2 , MgI 2 , CaI 2 , SrI 2 , BaI 2 may include the like.

[0103] Examples of the transition metal halides 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 3etc.), tungsten halides (e.g., WF 3 , WCl 3 , WBr 3 , WI 3 etc.), manganese halides (e.g., MnF 2 , MnCl 2 , MnBr 2 , MnI 2 etc.), technetium halides (e.g., TcF 2 , TcCl 2 , TcBr 2 , TcI 2 etc.), rhenium halides (e.g., ReF 2 , ReCl 2 , ReBr 2 , ReI 2 etc.), iron 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., PdF2 , PdCl 2 , PdBr 2 , PdI 2 etc.), platinum halides (e.g., PtF 2 , PtCl 2 , PtBr 2 , PtI 2 etc.), copper halides (e.g., CuF, CuCl, CuBr, CuI, etc.), silver halides (e.g., AgF, AgCl, AgBr, AgI, etc.), gold halides (e.g., AuF, AuCl, AuBr, AuI, etc.) may be included.

[0104] Examples of the post-transition metal halides may include zinc halides (e.g., ZnF 2 , ZnCl 2 , ZnBr 2 , ZnI 2 etc.), indium halides (e.g., InI 3 etc.), tin halides (e.g., SnI 2 etc.) may be included.

[0105] Examples of the lanthanide metal halides are YbF, YbF 2 , YbF 3 , SmF 3 , YbCl, YbCl 2 , YbCl 3 , SmCl 3 , YbBr, YbBr 2 , YbBr 3 , SmBr 3 , YbI, YbI 2 , YbI 3 , SmI 3 etc.) may be included.

[0106] Examples of the semimetal halides may include antimony halides (e.g., SbCl 5 etc.) may be included.

[0107] Examples of the metal tellurides are alkali metal tellurides (e.g., Li 2 Te, Na 2 Te, K 2 Te, Rb2 Te, Cs 2 Te, etc.), alkaline earth metal tellurides (e.g., BeTe, MgTe, CaTe, SrTe, 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, Au 2 Te, etc.), post-transition metal tellurides (e.g., ZnTe, etc.), lanthanide metal tellurides (e.g., LaTe, CeTe, PrTe, NdTe, PmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, etc.), etc. may be included.

[0108] [Light-emitting layer in the intermediate layer 130] When the light-emitting element 10 is a full-color light-emitting element, the light-emitting layer is patterned into a red light-emitting layer, a green light-emitting layer, and / or a blue light-emitting layer for each individual sub-pixel. Alternatively, the light-emitting layer has a structure in which two or more of the red light-emitting layer, the green light-emitting layer, and the blue light-emitting layer are stacked in contact or separated, or has a structure in which two or more of the red light-emitting substance, the green light-emitting substance, and the blue light-emitting substance are mixed without layer separation and can emit white light.

[0109] The light-emitting layer may include a host and a dopant. The dopant may include a phosphorescent dopant, a fluorescent dopant, or any combination thereof.

[0110] The content of the dopant in the light-emitting layer is about 0.01 to about 15 parts by weight based on 100 parts by weight of the host.

[0111] Alternatively, the light-emitting layer may contain the aforementioned quantum dots.

[0112] On the other hand, the light-emitting layer may contain a delayed fluorescence substance. The delayed fluorescence substance can serve as a host or a dopant in the light-emitting layer.

[0113] The thickness of the light-emitting layer is about 100 Å to about 1000 Å, for example, about 200 Å to about 600 Å. When the thickness of the light-emitting layer satisfies the range as described above, excellent light-emitting characteristics can be exhibited without a substantial increase in the driving voltage.

[0114] [Quantum dots] The light-emitting layer may contain quantum dots.

[0115] In this specification, quantum dots mean crystals of semiconductor compounds and may include any substance that can emit light of various emission wavelengths depending on the size of the crystals.

[0116] The diameter of the quantum dots is, for example, about 1 nm to about 10 nm.

[0117] The quantum dots are synthesized by a wet chemical process, a metalorganic chemical vapor deposition process, a molecular beam epitaxy process, or a process similar thereto.

[0118] The wet chemical process is a method of growing quantum dot particle crystals after mixing an organic solvent and a precursor substance. When the crystals grow, the organic solvent naturally acts as a dispersant coordinated to the surface of the quantum dot crystals to regulate the growth of the crystals. Therefore, it is easier than vapor deposition methods such as metal organic chemical vapor deposition (MOCVD) and molecular beam epitaxy (MBE), and the growth of quantum dot particles can be controlled through a low-cost process.

[0119] The quantum dots may include II-VI group semiconductor compounds; III-V group semiconductor compounds; III-VI group semiconductor compounds; I-III-VI group semiconductor compounds; IV-VI group semiconductor compounds; group IV elements or compounds; or any combination thereof.

[0120] Examples of the II-VI group semiconductor compounds may include binary compounds such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS; ternary compounds such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS; quaternary compounds such as CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe; or any combination thereof.

[0121] Examples of the III-V semiconductor compounds may include binary compounds such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, and InSb; ternary compounds such as GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, and InPSb; quaternary compounds such as GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, and InAlPSb; or any combination thereof. On the other hand, the III-V semiconductor compounds may further contain Group II elements. Examples of the III-V semiconductor compounds further containing Group II elements may include InZnP, InGaZnP, InAlZnP, and the like.

[0122] Examples of the III-VI semiconductor compounds include 2 Se 3 , GaTe, InS, InSe, In 2 S 3 , In 2 Se 3 , InTe and other binary compounds; InGaS 3 , InGaSe 3 and other ternary compounds; or any combination thereof.

[0123] Examples of the I-III-VI semiconductor compounds include ternary compounds such as AgInS, AgInS 2 , CuInS, CuInS 2 , CuGaO 2 , AgGaO 2 , AgAlO 2 and the like; or any combination thereof.

[0124] Examples of the Group-IV to Group-VI semiconductor compounds may include binary compounds such as SnS, SnSe, SnTe, PbS, PbSe, PbTe; ternary compounds such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe; quaternary compounds such as SnPbSSe, SnPbSeTe, SnPbSTe; or any combination thereof.

[0125] Examples of the Group-IV element or compound may include single elements such as Si, Ge; binary compounds such as SiC, SiGe; or any combination thereof.

[0126] Each element contained in the multi-element compounds such as the binary compounds, ternary compounds, and quaternary compounds may be present in the particles at a uniform concentration or a non-uniform concentration.

[0127] On the other hand, the quantum dots may have a single structure in which the concentration of each element contained in the quantum dots is uniform, or a core-shell double structure. For example, the substance contained in the core and the substance contained in the shell are different from each other.

[0128] The shell of the quantum dots can serve as a protective layer for preventing chemical modification of the core and maintaining semiconductor characteristics, and / or as a charging layer for imparting electrophoretic characteristics to the quantum dots. The shell may be a single layer or a multilayer. The interface between the core and the shell may have a concentration gradient in which the concentration of the elements present in the shell decreases toward the center.

[0129] Examples of the shell of the quantum dots include metals, semimetals or nonmetal oxides, semiconductor compounds, or combinations thereof. Examples of the metals, semimetals or nonmetal oxides include SiO 2 , Al 2 O 3 , TiO 2 , ZnO, MnO, Mn 2 O 3, Mn 3 O 4 , CuO, FeO, Fe 2 O 3 , Fe 3 O 4 , CoO, Co 3 O 4 , binary compounds such as NiO; MgAl 2 O 4 , CoFe 2 O 4 , NiFe 2 O 4 , CoMn 2 O 4 etc. ternary compounds; or any combination thereof; may be included. Examples of the semiconductor compound may include II-VI group semiconductor compounds; III-V group semiconductor compounds; III-VI group semiconductor compounds; I-III-VI group semiconductor compounds; IV-VI group semiconductor compounds; or any combination thereof; as described in this specification. For example, the semiconductor compound may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, or any combination thereof.

[0130] The quantum dots can have a full width of half maximum (FWHM) of the emission wavelength spectrum of about 45 nm or less, specifically about 40 nm or less, and more specifically about 30 nm or less, and the color purity and color reproducibility can be improved within this range. In addition, the light emitted through such quantum dots is emitted in all directions, and thus the wide viewing angle can be improved.

[0131] In addition, the quantum dots are specifically in the form of spherical particles, pyramid-shaped particles, multi-arm particles, cubic nanoparticles, nanotube particles, nanowire particles, nanofiber particles, nanoplate particles, etc.

[0132] By adjusting the size of the quantum dots, the energy band gap can be adjusted, so that light in a variety of wavelength bands can be obtained from the quantum dot light-emitting layer. Therefore, by using quantum dots of different sizes, a light-emitting device that emits light of multiple wavelengths can be realized. Specifically, the size of the quantum dots can be selected so that red light, green light, and / or blue light is emitted. Also, the size of the quantum dots can be configured so that light of various colors is combined to emit white light.

[0133] [Electron transport region in the intermediate layer 130] The electron transport region can have a single-layer structure consisting of a single layer of a single substance, a single-layer structure consisting of a single layer containing a plurality of different substances, or a multilayer structure including a plurality of layers containing a plurality of different substances.

[0134] The electron transport region may include a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0135] For example, the electron transport region can have a structure such as an electron transport layer / electron injection layer stacked in order from the light-emitting layer, or a hole blocking layer / electron transport layer / electron injection layer.

[0136] The electron transport region (for example, the hole blocking layer or the electron transport layer in the electron transport region) may include a metal-free compound containing at least one π-electron deficient nitrogen-containing C 1 -C 60 ring group.

[0137] For example, the electron transport region may include a compound represented by the following Chemical Formula 601. [Chemical Formula 601] [Ar 601 xe11 -[(L 601 ) xe1 -R 601 xe21

[0138] ​​In the chemical formula 601, Ar 601 and L 601 are, independently of each other, a C 10a -C 3 carbon ring group which is substituted or unsubstituted with at least one R 60 or a C 10a -C 1 heterocyclic group which is substituted or unsubstituted with at least one R 60 wherein xe11 is 1, 2 or 3, xe1 is 0, 1, 2, 3, 4 or 5, R is a C 601 -C 10a carbon ring group which is substituted or unsubstituted with at least one R 3 or a C 60 -C 10a heterocyclic group which is substituted or unsubstituted with at least one R 1 -C 60 -Si(Q 601 )(Q 602 )(Q 603 ), -C(=O)(Q 601 ), -S(=O) 2 (Q 601 ), or -P(=O)(Q 601 )(Q 602 ), For the description of the above Q 601 ~Q 603 please refer to the description of Q 1 in this specification respectively, xe21 is 1, 2, 3, 4 or 5, At least one of the above Ar 601 , L 601 and R 601 can be, independently of each other, a π-electron-deficient nitrogen-containing C 10a -C 1 ring group which is substituted or unsubstituted with at least one R 60 .

[0139] For example, in the chemical formula 601, when xe11 is 2 or more, two or more Ar 601 can be connected to each other via a single bond.

[0140] As another example, in the chemical formula 601, Ar 601 may be a substituted or unsubstituted anthracene group.

[0141] As yet another example, the electron transport region may include a compound represented by the following chemical formula 601-1:

[0142] [Chemical formula 601-1] JPEG2025517059000015.jpg34170

[0143] In the chemical formula 601-1, X 614 is N or C(R 614 ), X 615 is N or C(R 615 ), X 616 is N or C(R 616 ), X 614 ~X 616 at least one of which is N, L 611 ~L 613 For the description of each, refer to the description of the respective L 601 , For the description of xe611~xe613, refer to the description of the respective xe1, R 611 ~R 613 For the description of each, refer to the description of the respective R 601 , R 614 ~R 616 are, independently of each other, hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, C 1 -C 20 alkyl group, C 1 -C 20 alkoxy group, a C 10a -C 3 -C 60 carbocyclic group substituted or unsubstituted with at least one R 10a , or a C 1 -C 60It can be a heterocyclic group.

[0144] For example, in the chemical formulas 601 and 601-1, xe1 and xe611 to xe613 are, independently of each other, 0, 1 or 2.

[0145] The electron transport region may include one of the following compounds ET1 to 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:

[0146] JPEG2025517059000016.jpg182170JPEG2025517059000017.jpg249170JPEG2025517059000018.jpg96170

[0147] The thickness of the electron transport region is about 100 Å to about 5000 Å, for example, about 160 Å to about 4000 Å. 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 is, independently of each other, about 20 Å to about 1000 Å, for example, about 30 Å to about 300 Å, and the thickness of the electron transport layer is about 100 Å to about 1000 Å, for example, about 150 Å to about 500 Å. When the thickness of the hole blocking layer and / or the electron transport layer satisfies the above range, the electron transport characteristics to be satisfied can be obtained without a substantial increase in the driving voltage.

[0148] The electron transport region (for example, the electron transport layer in the electron transport region) may further include a metal-containing substance in addition to the substances as described above.

[0149] The metal-containing substance 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, an Sr ion, or a Ba ion. The ligands coordinated to the metal ions of the alkali metal complex and the alkaline earth metal complex may independently of each other include hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline, cyclopentadiene, or any combination thereof.

[0150] For example, the metal-containing substance may include a Li complex. The Li complex may include, for example, the following compound ET-D1(LiQ) or ET-D2:

[0151] JPEG2025517059000019.jpg42170

[0152] 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 be in direct contact with the second electrode 150.

[0153] The electron injection layer may have i) a single-layer structure consisting of a single layer of a single substance, ii) a single-layer structure consisting of a single layer containing a plurality of different substances, or iii) a multilayer structure having a plurality of layers containing a plurality of different substances.

[0154] The electron injection layer may contain 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.

[0155] 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.

[0156] The alkali metal-containing compound, the alkaline earth metal-containing compound, and the rare earth metal-containing compound may each include an oxide, a halide (e.g., fluoride, chloride, bromide, iodide, etc.), a telluride, or any combination thereof of the alkali metal, the alkaline earth metal, and the rare earth metal.

[0157] The alkali metal-containing compound may be an alkali metal oxide such as Li 2 O, Cs 2 O, K 2 O, or an alkali metal halide such as LiF, NaF, CsF, KF, LiI, NaI, CsI, KI, or any combination thereof. The alkaline earth metal-containing compound may include an alkaline earth metal compound such as BaO, SrO, CaO, Ba x Sr 1-x O (where x is a real number satisfying 0 < x < 1), Ba x Ca 1-x O (where x is a real number satisfying 0 < x < 1). The rare earth metal-containing compound may include YbF 3 , ScF 3 , Sc 2 O 3 , Y 2 O 3 , Ce 2 O 3 , GdF 3 , TbF 3 , YbI 3 , ScI3 、 TbI 3 or any combination thereof. Alternatively, the rare earth metal-containing compound may include a lanthanide metal telluride. Examples of the lanthanide metal telluride 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 、 Lu 2 Te 3 and the like may be included.

[0158] The alkali metal complex, alkaline earth metal complex, and rare earth metal complex each contain i) one of the metal ions of the alkali metal, alkaline earth metal, and rare earth metal as described above, and ii) a ligand bonded to the metal ion, for example, hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline, cyclopentadiene, or any combination thereof.

[0159] The electron injection layer may consist of only 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 as described above, or may further contain an organic substance (for example, the compound represented by the chemical formula 601).

[0160] According to one embodiment, the electron injection layer consists of i) an alkali metal-containing compound (for example, an alkali metal halide), or ii) a combination of a) an alkali metal-containing compound (for example, an alkali metal halide), and b) an alkali metal, alkaline earth metal, rare earth metal, or any combination thereof. For example, the electron injection layer is a KI:Yb co-evaporated layer, an RbI:Yb co-evaporated layer, or the like.

[0161] When the electron injection layer further contains an organic substance, 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 is uniformly or non-uniformly dispersed in the matrix containing the organic substance.

[0162] The thickness of the electron injection layer is from about 1 Å to about 100 Å, or from about 3 Å to about 90 Å. When the thickness of the electron injection layer satisfies the range as described above, electron injection characteristics to be satisfied can be obtained without substantial increase in driving voltage.

[0163] [Second electrode 150] Above the intermediate layer 130 as described above, a second electrode 150 is disposed. The second electrode 150 may be a cathode which is an electron injection electrode. At this time, as the material for the second electrode 150, a metal, an alloy, an electrically conductive compound, or any combination thereof having a low work function can be used.

[0164] 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 can be a transmissive electrode, a semi - transmissive electrode, or a reflective electrode.

[0165] The second electrode 150 can have a single - layer structure which is a single layer, or a multilayer structure having a plurality of layers.

[0166] [Capping layer] A first capping layer is disposed outside the first electrode 110 and / or a second capping layer is disposed outside the second electrode 150. Specifically, the light - emitting element 10 can have a structure in which the first capping layer, the first electrode 110, the intermediate layer 130, and the second electrode 150 are stacked in this order, a structure in which the first electrode 110, the intermediate layer 130, the second electrode 150, and the second capping layer are stacked in this order, or a structure in which the first capping layer, the first electrode 110, the intermediate layer 130, the second electrode 150, and the second capping layer are stacked in this order.

[0167] The light generated in the light-emitting layer within the intermediate layer 130 of the light-emitting element 10 is extracted to the outside through the first electrode 110, which is a semi-transmissive electrode or a transmissive electrode, and the first capping layer, and the light generated in the light-emitting layer within the intermediate layer 130 of the light-emitting element 10 is extracted to the outside through the second electrode 150, which is a semi-transmissive electrode or a transmissive electrode, and the second capping layer.

[0168] The first capping layer and the second capping layer can play a role in improving the external light emission efficiency based on the principle of reinforcement interference. Thereby, the light extraction efficiency of the light-emitting element 10 is improved, and the light emission efficiency of the light-emitting element 10 can be improved.

[0169] Each of the first capping layer and the second capping layer may contain a substance having a refractive index (at 589 nm) of 1.6 or more.

[0170] The first capping layer and the second capping layer may be, independently of each other, an organic capping layer containing an organic substance, an inorganic capping layer containing an inorganic substance, or an organic-inorganic composite capping layer containing an organic substance and an inorganic substance.

[0171] At least one of the first capping layer and the second capping layer may, independently of each other, contain a carbocyclic compound, a heterocyclic compound, an amine 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 amine group-containing compound may optionally be substituted with a substituent containing O, N, S, Se, Si, F, Cl, Br, I, or any combination thereof. According to one embodiment, at least one of the first capping layer and the second capping layer may, independently of each other, contain an amine group-containing compound.

[0172] For example, at least one of the first capping layer and the second capping layer may independently contain the compound represented by Chemical Formula 201, the compound represented by Chemical Formula 202, or any combination thereof.

[0173] According to still another embodiment, at least one of the first capping layer and the second capping layer may independently contain one of the compounds HT28 to HT33, one of the following compounds CP1 to CP6, β-NPB, or any compound thereof:

[0174] JPEG2025517059000020.jpg136170

[0175] [Electronic device] The light-emitting element is also included in various electronic devices. For example, the electronic device including the light-emitting element is a light-emitting device, an authentication device, or the like.

[0176] The electronic device (for example, a light-emitting device) may further include, in addition to the light-emitting element, i) a color filter, ii) a color conversion layer, or iii) a color filter and a color conversion layer. The color filter and / or the color conversion layer may be disposed in at least one traveling direction of the light emitted from the light-emitting element. For example, the light emitted from the light-emitting element may be blue light or white light. Refer to the foregoing description for the description of the light-emitting element.

[0177] The electronic device includes a first substrate. The first substrate includes a plurality of sub-pixel regions, the color filter includes a plurality of color filter regions corresponding to the plurality of sub-pixel regions, and the color conversion layer includes a plurality of color conversion regions corresponding to the plurality of sub-pixel regions.

[0178] A pixel defining film is disposed between the plurality of sub-pixel regions to define each sub-pixel region.

[0179] The color filter may further include a plurality of color filter regions and a light-shielding pattern disposed between the plurality of color filter regions, and the color conversion layer may further include a plurality of color conversion regions and a light-shielding pattern disposed between the plurality of color conversion regions.

[0180] The plurality of color filter regions (or the plurality of color conversion regions) 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, and the first color light, the second color light, and / or the third color light can have different maximum emission wavelengths from each other. For example, the first color light is red light, the second color light is green light, and the third color light is blue light. For example, the plurality of color filter regions (or the plurality of color conversion regions) may include quantum dots. Specifically, the first region includes red quantum dots, the second region includes green quantum dots, and the third region does not include quantum dots. Refer to the description of quantum dots as described in this specification. The first region, the second region, and / or the third region may each further include a scatterer.

[0181] The region containing quantum dots can be formed using a composition containing quantum dots coordinated with the compound of the present invention.

[0182] For example, the light-emitting element emits first light, the first region absorbs the first light and emits first-1 color light, the second region absorbs the first light and emits second-1 color light, and the third region absorbs the first light and emits third-1 color light. At this time, the first-1 color light, the second-1 color light, and the third-1 color light can have different maximum emission wavelengths from each other. Specifically, the first light is blue light, the first-1 color light is red light, the second-1 color light is green light, and the third-1 color light is blue light.

[0183] In addition to the light-emitting element as described above, the electronic device may further include a thin-film transistor. The thin-film transistor includes a source electrode, a drain electrode, and an active layer, and either one of the source electrode and the drain electrode may be electrically connected to either one of the first electrode and the second electrode of the light-emitting element.

[0184] The thin-film transistor may further include a gate electrode, a gate insulating film, and the like.

[0185] The active layer may include crystalline silicon, amorphous silicon, an organic semiconductor, an oxide semiconductor, or the like.

[0186] The electronic device may further include a sealing portion for sealing the light-emitting element. The sealing portion is disposed between the color filter and / or the color conversion layer and the light-emitting element. The sealing portion allows the light from the light-emitting element to be extracted to the outside while simultaneously blocking the penetration of outside air and moisture into the light-emitting element. 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 one or more organic layers and / or inorganic layers. When the sealing portion is a thin-film encapsulation layer, the electronic device is flexible.

[0187] In addition to the color filter and / or the color conversion layer, various functional layers may be further disposed on the sealing portion depending on the use of the electronic device. Examples of the functional layer may include a touch screen layer, a polarizing layer, and the like. The touch screen layer may be a vacuum touch screen layer, an electrostatic touch screen layer, or an infrared touch screen layer. The authentication device is, for example, a biometric authentication device that authenticates an individual using biometric information of a living body (e.g., fingertip, pupil, etc.).

[0188] In addition to the light-emitting element as described above, the authentication device may further include biometric information collection means.

[0189] The electronic device can be applied to various displays, light sources, lighting, personal computers (e.g., mobile personal computers), mobile phones, digital cameras, electronic notebooks, electronic dictionaries, electronic game machines, medical devices (e.g., electronic thermometers, blood pressure monitors, blood glucose meters, pulse measurement devices, pulse wave measurement devices, electrocardiogram display devices, ultrasonic diagnostic devices, endoscope display devices), fish finders, various measuring devices, instruments (e.g., vehicle, aircraft, and ship instruments), projectors, etc.

[0190] [Explanation Regarding FIGS. 2 and 3] FIG. 2 is a cross-sectional view of an electronic device 180 according to an embodiment of the present invention.

[0191] The electronic device 180 in FIG. 2 includes a substrate 100, a thin film transistor (TFT), a light-emitting element, and a sealing portion 300 that seals the light-emitting element.

[0192] The substrate 100 may be a flexible substrate, a glass substrate, or a metal substrate. A buffer layer 210 may be disposed on the substrate 100. The buffer layer 210 can prevent the penetration of impurities through the substrate 100 and serve to provide a flat surface on the upper portion of the substrate 100.

[0193] A thin film transistor (TFT) may be disposed on the buffer layer 210. The thin film transistor (TFT) includes an active layer 220, a gate electrode 240, a source electrode 260, and a drain electrode 270.

[0194] The active layer 220 may include an inorganic semiconductor such as silicon or polysilicon, an organic semiconductor, or an oxide semiconductor, and includes a source region, a drain region, and a channel region.

[0195] On the upper portion of the active layer 220, a gate insulating film 230 for insulating the active layer 220 and the gate electrode 240 is disposed, and the gate electrode 240 may be disposed on the upper portion of the gate insulating film 230.

[0196] An interlayer insulating film 250 may be disposed on top of the gate electrode 240. The interlayer insulating film 250 is disposed between the gate electrode 240 and the source electrode 260, and between the gate electrode 240 and the drain electrode 270, and serves to insulate them.

[0197] The source electrode 260 and the drain electrode 270 may be disposed on the interlayer insulating film 250. The interlayer insulating film 250 and the gate insulating film 230 are formed such that the source region and the drain region of the active layer 220 are exposed, and the source electrode 260 and the drain electrode 270 may be disposed in contact with the exposed source region and drain region of the active layer 220.

[0198] The thin film transistor (TFT) is electrically connected to the light emitting element, can drive the light emitting element, and is covered and protected by a passivation layer 280. The passivation layer 280 may include an inorganic insulating film, an organic insulating film, or a combination thereof. A light emitting element is provided on the passivation layer 280. The light emitting element includes a first electrode 110, an intermediate layer 130, and a second electrode 150.

[0199] The first electrode 110 may be disposed on the passivation layer 280. The passivation layer 280 is disposed so as to expose a predetermined region without covering the entire drain electrode 270, and the first electrode 110 may be disposed to be connected to the exposed drain electrode 270.

[0200] A pixel defining film 290 containing an insulator may be disposed on the first electrode 110. The pixel defining film 290 exposes a predetermined region of the first electrode 110, and the intermediate layer 130 may be formed in the exposed region. The pixel defining film 290 may be a polyimide or polyacrylic organic film. Although not shown in FIG. 2, some or all of the layers of the intermediate layer 130 extend to the top of the pixel defining film 290 and are also arranged in the form of a common layer.

[0201] On the intermediate layer 130, a second electrode 150 is disposed, and a capping layer 170 may be further formed on the second electrode 150. The capping layer 170 is formed to cover the second electrode 150.

[0202] On the capping layer 170, a sealing portion 300 may be disposed. The sealing portion 300 is disposed on the light-emitting element and can play a role of protecting the light-emitting element from moisture and oxygen. The sealing portion 300 may include an inorganic film containing silicon nitride (SiNx), silicon oxide (SiOx), indium tin oxide, indium zinc oxide, or any combination thereof, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane, an acrylic resin (e.g., polymethyl methacrylate, polyacrylic acid, etc.), an epoxy resin (e.g., aliphatic glycidyl ether (AGE), etc.), or any combination thereof, or a combination of an inorganic film and an organic film.

[0203] FIG. 3 is a cross-sectional view of an electronic device 190 according to another embodiment of the present invention.

[0204] The electronic device 190 in FIG. 3 is the same as the electronic device in FIG. 2 except that a light-shielding pattern 500 and a functional region 400 are further disposed above the sealing portion 300. The functional region 400 may be i) a color filter region, ii) a color conversion region, or iii) a combination of a color filter region and a color conversion region. According to one embodiment, the light-emitting element included in the electronic device in FIG. 3 may be a tandem light-emitting element.

[0205] [Manufacturing Method] Each layer included in the hole transport region, the light-emitting layer, and each layer included in the electron transport region can be formed in a predetermined region by using various methods such as vacuum evaporation, spin coating, casting, LB (Langmuir-Blodgett) method, inkjet printing method, laser printing method, and laser induced thermal imaging (LITI) method, respectively.

[0206] The color filter region, color conversion region, etc. can be formed in a predetermined region by using methods such as spin coating, casting, and inkjet printing.

[0207] When forming each layer included in the hole transport region, the light-emitting layer, and each layer included in the electron transport region by vacuum evaporation, the evaporation conditions can be selected considering the material included in the layer to be formed and the structure of the layer to be formed, within a range of, for example, an evaporation temperature of about 100 to about 500 °C, a degree of vacuum of about 10 -8 ~ about 10 -3 torr, and an evaporation rate of about 0.01 to about 100 Å / sec.

[0208] When forming each layer included in the hole transport region, the light-emitting layer, and each layer included in the electron transport region by spin coating, the coating conditions can be selected considering the material included in the layer to be formed and the structure of the layer to be formed, within a range of, for example, a coating speed of about 2000 rpm to about 5000 rpm and a heat treatment temperature of about 80 °C to 200 °C.

[0209] The composition according to an embodiment of the present invention can be used in solution processes such as spin coating and inkjet printing.

[0210] [General definition of substituents] In this specification, C 3 -C 60 The carbocyclic group means a ring group having 3 to 60 carbon atoms consisting only of carbon as ring-forming atoms, C 1 -C60 The heterocyclic group means a ring group having 1 to 60 carbon atoms that further contains a heteroatom as a ring-forming atom in addition to carbon. The said C 3 -C 60 The carbocyclic group and C 1 -C 60 Each of the heterocyclic groups may be a monocyclic group consisting of one ring or a polycyclic group in which two or more rings are condensed with each other. For example, the said C 1 -C 60 The number of ring-forming atoms of the heterocyclic group is 3 to 61.

[0211] In this specification, the ring group includes the said C 3 -C 60 the carbocyclic group and C 1 -C 60 all of the heterocyclic groups.

[0212] In this specification, the π-electron-excessive C 3 -C 60 ring group means a ring group having 3 to 60 carbon atoms that does not contain *-N=*’ as a ring-forming moiety, and the π-electron-deficient nitrogen-containing C 1 -C 60 ring group means a heterocyclic group having 1 to 60 carbon atoms that contains *-N=*’ as a ring-forming moiety.

[0213] For example, the said C 3 -C 60 The carbocyclic group is i) a group T1 or ii) a condensed ring group in which two or more groups T1 are condensed with each other (for example, a cyclopentadiene group, an adamantane group, a norbornane group, a benzene group, a pentalene group, a naphthalene group, an azulene group, an indacene group, an acenaphthylene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyrene group, a chrysene group, a perylene group, a pentaphene group, a heptalene group, a naphthacene group, a picene group, a hexacene group, a pentacene group, a rubicene group, a coronene group, an ovalene group, an indene group, a fluorene group, a spiro-bifluorene group, a benzofluorene group, an indenophenanthrene group, or an indenoanthracene group), the said C 1 -C 60The heteroaryl group is i) group T2, ii) a condensed ring group in which two or more groups T2 are condensed with each other, or iii) a condensed ring group in which one or more groups T2 and one or more groups T1 are condensed with each other (for example, pyrrole group, thiophene group, furan group, indole group, benzoindole group, naphthylindole group, isoindole group, benzisoindole group, naphthisoindole group, benzosilole group, benzothiophene group, benzofuran group, carbazole group, dibenzosilole group, dibenzothiophene group, dibenzofuran group, indenocarbazole group, indolocarbazole group, benzofluorocarbazole group, benzothienocarbazole group, benzosilolocarbazole group, benzoindolocarbazole group, benzocarbazole group, benzonaphthofuran group, benzonaphthothiophene group, benzonaphthosilole group, benzofluorodibenzofuran group, benzofluorodibenzothiophene group, benzothienodibenzothiophene group, pyrazole group, imidazole group, triazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiazole group, thiadiazole group, benzopyrazole group, benzimidazole group, benzoxazole group, benzisoxazole group, benzothiazole group, benzisothiazole group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, benzoquinoline group, benzoisoquinoline group, quinoxaline group, benzoquinoxaline group, quinazoline group, benzoquinazoline group, phenanthroline group, cinnoline group, phthalazine group, naphthyridine group, imidazopyridine group, imidazopyrimidine group, imidazotriazine group, imidazopyrazine group, imidazopyridazine group, azacarbazole group, azafluorene group, azadibenzosilole group, azadibenzothiophene group, azadibenzofuran group, etc.), The π-electron-excessive C 3 -C 60 ring group is i) group T1, ii) a condensed ring group in which two or more groups T1 are condensed with each other, iii) group T3, iv) a condensed ring group in which two or more groups T3 are condensed with each other, or v) a condensed ring group in which one or more groups T3 and one or more groups T1 are condensed with each other (for example, the C 3 -C 60a carbon ring group, 1H-pyrrole group, silole group, borole group, 2H-pyrrole group, 3H-pyrrole group, thiophene group, furan group, indole group, benzoindole group, naphthindole group, isoindole group, benzisoindole group, naphthisoindole group, benzosilole group, benzothiophene group, benzofuran group, carbazole group, dibenzosilole group, dibenzothiophene group, dibenzofuran group, indenocarbazole group, indolocarbazole group, benzofluorocarbazole group, benzothienocarbazole group, benzosilolocarbazole group, benzoindolocarbazole group, benzocarbazole group, benzonaphthofuran group, benzonaphthothiophene group, benzonaphthosilole group, benzofluorodibenzofuran group, benzofluorodibenzothiophene group, benzothienodibenzothiophene group, etc.), and the π-electron-deficient nitrogen-containing C 1 -C 60 ring group is i) group T4, ii) a condensed ring group in which two or more groups T4 are condensed with each other, iii) a condensed ring group in which one or more groups T4 and one or more groups T1 are condensed with each other, iv) a condensed ring group in which one or more groups T4 and one or more groups T3 are condensed with each other, or v) a condensed ring group in which one or more groups T4, one or more groups T1 and one or more groups T3 are condensed with each other (for example, pyrazole group, imidazole group, triazole group, oxazole group, isoxazole group, oxadiazole group, thiazole group, isothiazole group, thiadiazole group, benzopyrazole group, benzimidazole group, benzoxazole group, benzisoxazole group, benzothiazole group, benzisothiazole group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, benzoquinoline group, benzoisoquinoline group, quinoxaline group, benzoquinoxaline group, quinazoline group, benzoquinazoline group, phenanthroline group, cinnoline group, phthalazine group, naphthyridine group, imidazopyridine group, imidazopyrimidine group, imidazotriazine group, imidazopyrazine group, imidazopyridazine group, azacarbazole group, azafluorene group, azadibenzosilole group, azadibenzothiophene group, azadibenzofuran group, etc.), and The group T1 is a cyclopropane group, a cyclobutane group, a cyclopentane group, a cyclohexane group, a cycloheptane group, a cyclooctane group, a cyclobutene group, a cyclopentene group, a cyclopentadiene group, a cyclohexene group, a cyclohexadiene group, a cycloheptene group, an adamantane group, a norbornane (or bicyclo[2.2.1]heptane) group, a norbornene group, a bicyclo[1.1.1]pentane group, a bicyclo[2.1.1]hexane group, a bicyclo[2.2.2]octane group, or a benzene group, The group T2 is a furan group, a thiophene group, a 1H-pyrrole group, a silole group, a borole group, a 2H-pyrrole group, a 3H-pyrrole group, an imidazole group, a pyrazole group, a triazole group, a tetrazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an azasilole group, an azaborole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a tetrazine group, a pyrrolidine group, an imidazolidine group, a dihydropyrrole group, a piperidine group, a tetrahydropyridine group, a dihydropyridine group, a hexahydropyrimidine group, a tetrahydropyrimidine group, a dihydropyrimidine group, a piperazine group, a tetrahydropyrazine group, a dihydropyrazine group, a tetrahydropyridazine group, or a dihydropyridazine group, The group T3 is a furan group, a thiophene group, a 1H-pyrrole group, a silole group, or a borole group, The group T4 may be a 2H-pyrrole group, a 3H-pyrrole group, an imidazole group, a pyrazole group, a triazole group, a tetrazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an azasilole group, an azaborole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, or a tetrazine group.

[0214] In this specification, a ring group, C 3 -C 60 a carbocyclic group, C 1 -C 60 a heterocyclic group, a π-electron-excessive C 3 -C 60A cyclic group, or a nitrogen-containing C with π-electron deficiency 1 -C 60 The term "cyclic group" may be a group condensed to any cyclic group, a monovalent group, or a polyvalent group (e.g., divalent group, trivalent group, tetravalent group, etc.) depending on the structure of the chemical formula in which the term is used. For example, the "benzene group" includes a benzo group, a phenyl group, a phenylene group, etc., which can be easily understood by those skilled in the art depending on the structure of the chemical formula containing the "benzene group".

[0215] For example, monovalent C 3 -C 60 A carbocyclic group and monovalent C 1 -C 60 Examples of heterocyclic groups include C 3 -C 10 A cycloalkyl group, C 1 -C 10 A heterocycloalkyl group, C 3 -C 10 A cycloalkenyl group, C 1 -C 10 A heterocycloalkenyl group, C 6 -C 60 An aryl group, C 1 -C 60 A heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic hetero-condensed polycyclic group may be included. Divalent C 3 -C 60 A carbocyclic group and divalent C 1 -C 60 Examples of heterocyclic groups include C 3 -C 10 A cycloalkylene group, C 1 -C 10 A heterocycloalkylene group, C 3 -C 10 A cycloalkenylene group, C 1 -C 10 A heterocycloalkenylene group, C 6 -C 60 An arylene group, C 1 -C 60 A heteroarylene group, a divalent non-aromatic condensed polycyclic group, and a divalent non-aromatic hetero-condensed polycyclic group may be included.

[0216] In this specification, C1 -C 60 The alkyl group means a linear or branched aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, and specific examples thereof include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, isobutyl group, tert-butyl group, n-pentyl group, tert-pentyl group, neopentyl group, isopentyl group, sec-pentyl group, 3-pentyl group, sec-isopentyl group, n-hexyl group, isohexyl group, sec-hexyl group, tert-hexyl group, n-heptyl group, isoheptyl group, sec-heptyl group, tert-heptyl group, n-octyl group, isooctyl group, sec-octyl group, tert-octyl group, n-nonyl group, isononyl group, sec-nonyl group, tert-nonyl group, n-decyl group, isodecyl group, sec-decyl group, tert-decyl group, etc. In this specification, C 1 -C 60 The alkylene group means a divalent group having the same structure as the above C 1 -C 60 alkyl group.

[0217] In this specification, C 2 -C 60 The alkenyl group means a monovalent hydrocarbon group containing one or more carbon-carbon double bonds in the middle or at the end of the C 2 -C 60 alkyl group, and specific examples thereof include ethenyl group, propenyl group, butenyl group, etc. In this specification, C 2 -C 60 The alkenylene group means a divalent group having the same structure as the above C 2 -C 60 alkenyl group.

[0218] In this specification, C 2 -C 60 The alkynyl group means a monovalent hydrocarbon group containing one or more carbon-carbon triple bonds in the middle or at the end of the C 2 -C 60 alkyl group, and specific examples thereof include ethynyl group, propynyl group, etc. In this specification, C 2 -C 60The alkynylene group is the divalent group having the same structure as the 2 -C 60 alkynyl group.

[0219] In the present specification, the C 1 -C 60 alkoxy group means a monovalent group having the chemical formula -OA 101 (where A 101 is the C 1 -C 60 alkyl group), and specific examples thereof include a methoxy group, an ethoxy group, an isopropyloxy group and the like.

[0220] In the present specification, the C 3 -C 10 cycloalkyl group means a monovalent saturated hydrocarbon ring group having 3 to 10 carbon atoms, and specific examples thereof include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group (or bicyclo[2.2.1]heptyl group), a bicyclo[1.1.1]pentyl group, a bicyclo[2.1.1]hexyl group, a bicyclo[2.2.2]octyl group and the like. In the present specification, the C 3 -C 10 cycloalkylene group means a divalent group having the same structure as the C 3 -C 10 cycloalkyl group.

[0221] In the present specification, the C 1 -C 10 heterocycloalkyl group means a monovalent ring group having 1 to 10 carbon atoms and further containing at least one hetero atom as a ring-forming atom in addition to carbon atoms, and specific examples thereof include a 1,2,3,4-oxatriazolidinyl group, a tetrahydrofuranyl group, a tetrahydrothiophenyl group and the like. In the present specification, the C 1 -C 10 heterocycloalkylene group means a divalent group having the same structure as the C 1 -C 10 heterocycloalkyl group.

[0222] In this specification, C 3 -C 10 The cycloalkenyl group means a monovalent cyclic group having 3 to 10 carbon atoms and having at least one carbon-carbon double bond in the ring, but not having aromaticity. Specific examples thereof include a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, and the like. In this specification, C 3 -C 10 The cycloalkenylene group means a divalent group having the same structure as the above C 3 -C 10 cycloalkenyl group.

[0223] In this specification, C 1 -C 10 The heterocycloalkenyl group means a monovalent cyclic group having 1 to 10 carbon atoms and further containing at least one hetero atom as a ring-forming atom in addition to carbon atoms, and having at least one double bond in the ring. The above C 1 -C 10 Specific examples of the heterocycloalkenyl group include a 4,5-dihydro-1,2,3,4-oxatriazolyl group, a 2,3-dihydrofuranyl group, a 2,3-dihydrothiophenyl group, and the like. In this specification, C 1 -C 10 The heterocycloalkenylene group means a divalent group having the same structure as the above C 1 -C 10 heterocycloalkenyl group.

[0224] In this specification, C 6 -C 60 The aryl group means a monovalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms, C 6 -C 60 The arylene group means a divalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms. The above C 6 -C 60Specific examples of the aryl group include a phenyl group, a pentalenyl group, a naphthyl group, an azulenyl group, an indacenyl group, an acenaphthyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a heptalenyl group, a naphthacenyl group, a picenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, and the like. The C 6 -C 60 aryl group and C 6 -C 60 When the arylene group contains two or more rings, the two or more rings are fused to each other.

[0225] In the present specification, C 1 -C 60 The heteroaryl group further contains at least one heteroatom as a ring-forming atom in addition to carbon atoms, and means a monovalent group having a heterocyclic aromatic system having 1 to 60 carbon atoms. C 1 -C 60 The heteroarylene group further contains at least one heteroatom as a ring-forming atom in addition to carbon atoms, and means a divalent group having a heterocyclic aromatic system having 1 to 60 carbon atoms. The C 1 -C 60 Specific examples of the heteroaryl group include a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, a benzoquinolinyl group, an isoquinolinyl group, a benzoisoquinolinyl group, a quinoxalinyl group, a benzoquinoxalinyl group, a quinazolinyl group, a benzoquinazolinyl group, a cinnolinyl group, a phenanthrolinyl group, a phthalazinyl group, a naphthyridinyl group, and the like. The C 1 -C 60 heteroaryl group and C 1 -C 60 When the heteroarylene group contains two or more rings, the two or more rings are fused to each other.

[0226] As used herein, a monovalent non-aromatic fused polycyclic group means a monovalent group (e.g., having 8 to 60 carbon atoms) in which two or more rings are fused to each other, containing only carbon as ring-forming atoms, and the whole molecule having non-aromaticity. Specific examples of the monovalent non-aromatic fused polycyclic group include an indenyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, an indenophenanthrenyl group, an indenoanthracenyl group, and the like. As used herein, a divalent non-aromatic fused polycyclic group means a divalent group having the same structure as the monovalent non-aromatic fused polycyclic group.

[0227] As used herein, a monovalent non-aromatic hetero-condensed polycyclic group means a monovalent group (for example, having 1 to 60 carbon atoms) in which two or more rings are condensed with each other, further containing at least one heteroatom in addition to carbon atoms as ring-forming atoms, and the whole molecule having non-aromaticity. Specific examples of the monovalent non-aromatic hetero-condensed polycyclic group include pyrrolyl group, thiophenyl group, furanyl group, indolyl group, benzoindolyl group, naphthoindolyl group, isoindolyl group, benzisoindolyl group, naphthoisoindolyl group, benzosilolyl group, benzothiophenyl group, benzofuranyl group, carbazolyl group, dibenzosilolyl group, dibenzothiophenyl group, dibenzofuranyl group, azacarbazolyl group, azafurenyl group, azadibenzosilolyl group, azadibenzothiophenyl group, azadibenzofuranyl group, pyrazolyl group, imidazolyl group, triazolyl group, tetrazolyl group, oxazolyl group, isoxazolyl group, thiazolyl group, isothiazolyl group, oxadiazolyl group, thiadiazolyl group, benzopyrazolyl group, benzimidazolyl group, benzoxazolyl group, benzothiazolyl group, benzoxadiazolyl group, benzothiadiazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, imidazotriazinyl group, imidazopyrazinyl group, imidazopyridazinyl group, indenocarbazolyl group, indolocarbazolyl group, benzofurocarbazolyl group, benzothienocarbazolyl group, benzosilolocarbazolyl group, benzoindolocarbazolyl group, benzocarbazolyl group, benzonaphthofuranyl group, benzonaphthothiophenyl group, benzonaphthosilolyl group, benzofurodibenzofuranyl group, benzofurodibenzothiophenyl group, benzothienodibenzothiophenyl group, etc. As used herein, a divalent non-aromatic hetero-condensed polycyclic group means a divalent group having the same structure as the monovalent non-aromatic hetero-condensed polycyclic group.

[0228] As used herein, C 6 -C 60 An aryloxy group is -OA 102 (wherein A 102 is the C 6 -C 60 aryl group), and the C 6 -C 60An arylthio group is -SA 103 (where A 103 is the above-mentioned C 6 -C 60 aryl group).

[0229] In this specification, a C 7 -C 60 arylalkyl group is -A 104 A 105 (where A 104 is a C 1 -C 54 alkylene group and A 105 is a C 6 -C 59 aryl group), and in this specification, a C 2 -C 60 heteroarylalkyl group is -A 106 A 107 (where A 106 is a C 1 -C 59 alkylene group and A 107 is a C 1 -C 59 heteroaryl group).

[0230] In this specification, "R 10a " is deuterium (-D), -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, or a nitro group; deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, a C 3 -C 60 carbocyclic group, a C 1 -C 60 heterocyclic group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 7 -C 60 arylalkyl group, a 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 a substituted or unsubstituted C, or any combination thereof 1 -C 60 alkyl group, C 2 -C 60 alkenyl group, C 2 -C 60 alkynyl group, or C 1 -C 60 alkoxy 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 60 heteroarylalkyl group, -Si(Q 21 )(Q 22 )(Q 23 )、 -N(Q 21 )(Q 22 )、 -B(Q 21 )(Q 22 )、 -C(=O)(Q 21 )、 -S(=O) 2 (Q 21 )、 -P(=O)(Q 21 )(Q 22 )、 or a substituted or unsubstituted C, or any combination thereof 3 -C 60A carbon ring group, C 1 -C 60 A hetero ring group, C 6 -C 60 An aryloxy group, C 6 -C 60 An arylthio group, C 7 -C 60 An arylalkyl group, or C 2 -C 60 A heteroarylalkyl group; or -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 )、or -P(=O)(Q 31 )(Q 32 ); may also be.

[0231] In this specification, Q 1 ~Q 3 、Q 11 ~Q 13 、Q 21 ~Q 23 and Q 31 ~Q 33 are, independently of each other, hydrogen; deuterium; -F; -Cl; -Br; -I; a hydroxyl group; a cyano group; a nitro group; C 1 -C 60 an alkyl group; C 2 -C 60 an alkenyl group; C 2 -C 60 an alkynyl group; C 1 -C 60 an alkoxy group; or deuterium, -F, a cyano group, C 1 -C 60 an alkyl group, C 1 -C 60 an alkoxy group, a phenyl group, a biphenyl group, or a carbon ring group, C 3 -C 60 substituted or unsubstituted with any combination thereof, C 1 -C 60Heterocyclic group, C 7 -C 60 Arylalkyl group, or C 2 -C 60 Heteroarylalkyl group; may also be.

[0232] In this specification, a heteroatom means any atom other than a carbon atom. Examples of said heteroatoms include O, S, N, P, Si, B, Ge, Se or any combination thereof.

[0233] In this specification, third row transition metals include hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum (Pt) and gold (Au), etc.

[0234] In this specification, "Ph" means a phenyl group, "Me" means a methyl group, "Et" means an ethyl group, "ter-Bu" or "Bu t " means a tert-butyl group, and "OMe" means a methoxy group.

[0235] In this specification, a "biphenyl group" means a "phenyl group substituted with a phenyl group". Said "biphenyl group" belongs to a "substituted phenyl group" where the substituent is a "C 6 -C 60 Aryl group".

[0236] In this specification, a "terphenyl group" means a "phenyl group substituted with a biphenyl group". Said "terphenyl group" belongs to a "substituted phenyl group" where the substituent is a "C 6 -C 60 Aryl group substituted C 6 -C 60 Aryl group".

[0237] In the substituent definition, the number of carbon atoms is an example. For example, in a C 1 -C 60 alkyl group, 60 carbon atoms is an example, and the definition regarding the alkyl group is C 1 -C20 It is equally applicable to an alkyl group. The same applies to other cases.

[0238] In this specification, * and *’ mean the bonding sites with adjacent atoms in the chemical formula, unless otherwise defined.

[0239] Hereinafter, the compounds and light-emitting elements according to an embodiment of the present invention will be described more specifically with reference to examples.

[0240] [Examples] Ligand synthesis Example 1

[0241] JPEG2025517059000021.jpg82170

[0242] A solution obtained by mixing 232 g of tetraethylene glycol monophenyl ether, 24.8 g of thiooctanoic acid, 4.4 g of 4-(N,N-dimethylamino)pyridine (DMAP), and 1200 ml of dichloromethane was placed in a flask maintained at 0.1 °C with ice water, nitrogen was introduced for 30 minutes, and a nitrogen atmosphere was maintained until the reaction was completed.

[0243] While stirring the reactants, a solution prepared by dissolving 27.2 g of N,N'-dicyclohexylcarbodiimide (DCC) in 80 ml of dichloromethane was gradually added dropwise over 40 minutes. After stirring for 1 hour in the cooled state, the temperature was gradually raised to room temperature and stirring was continued for 18 hours to promote the reaction.

[0244] The reactants were mixed with 1200 ml of a saturated aqueous solution of sodium bicarbonate, 400 ml of ethyl acetate was added, and the intermediate was extracted. The solvent was evaporated and the resulting product was dried. The intermediate was purified by column chromatography.

[0245] 16 g of the obtained intermediate was dissolved in 200 ml of a mixed solution of ethanol:water 1:4 (vol / vol) and stirred. To proceed with the reduction reaction, NaBH 41.7 g was added, and the mixture was stirred for 60 minutes under a nitrogen atmosphere. Then, 400 ml of brine was added, and the mixture was extracted three times with chloroform.

[0246] The solvent was evaporated and dried to obtain Compound 1.

[0247] Example 2

[0248] JPEG2025517059000022.jpg92170

[0249] Compound 2 was obtained in the same manner as in Example 1, except that 170 g of triethylene glycol monophenyl ether was used instead of tetraethylene glycol monophenyl ether.

[0250] Example 3

[0251] JPEG2025517059000023.jpg82170

[0252] Compound 3 was obtained in the same manner as in Example 1, except that 200 g of triethylene glycol monophenyl ether was used instead of tetraethylene glycol monophenyl ether.

[0253] Example 4

[0254] JPEG2025517059000024.jpg83170

[0255] Compound 4 was obtained in the same manner as in Example 1, except that 200 g of triethylene glycol monobutyl ether was used instead of tetraethylene glycol monophenyl ether.

[0256] Example 5

[0257] JPEG2025517059000025.jpg82170

[0258] Compound 5 was obtained in the same manner as in Example 1, except that 200 g of triethylene glycol monobenzyl ether was used instead of tetraethylene glycol monophenyl ether.

[0259] Compositions were prepared using the quantum dots and ligands shown in Table 1 below.

[0260]

Table 1

[0261] JPEG2025517059000027.jpg130170

[0262] Comparative Example 1 1 g of the quantum dots in Table 1 was added to chloroform at a 25 wt% content and stirred at room temperature for 1 hour. After adding 0.238 g of Compound 101, the mixture was stirred at 70 °C for 2 hours.

[0263] Hexane was added to the reaction solution at a ratio of 10 times, and the precipitate obtained by centrifugation (9500 rpm / 3 min) was dried under vacuum to obtain quantum dots in which the native ligand [oleic acid] of the quantum dots was replaced with Compound 101.

[0264] After mixing 0.375 g of the quantum dots and 0.526 g of the crosslinkable monomer 1,6-hexanediol diacrylate, the mixture was shaken for 12 hours, and 2 0.08 g of TiO and 0.01 g of the photoinitiator diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide were added, and the mixture was shaken for 3 hours to prepare a composition.

[0265] Comparative Example 2 Compositions were prepared in the same manner as in Comparative Example 1, except that 0.374 g of Compound 102 was used instead of Compound 101.

[0266] Comparative Example 3 A composition was produced in the same manner as in Comparative Example 1, except that 0.377 g of Compound 103 was used instead of Compound 101.

[0267] Comparative Example 4 A composition was produced in the same manner as in Comparative Example 1, except that 0.508 g of Compound 104 was used instead of Compound 101.

[0268] Comparative Example 5 A composition was produced in the same manner as in Comparative Example 1, except that 0.339 g of Compound 105 was used instead of Compound 101.

[0269] Example 6 A composition was produced in the same manner as in Comparative Example 1, except that 0.489 g of Compound 1 was used instead of Compound 101.

[0270] Example 7 A composition was produced in the same manner as in Comparative Example 1, except that 0.396 g of Compound 2 was used instead of Compound 101.

[0271] Example 8 A composition was produced in the same manner as in Comparative Example 1, except that 0.442 g of Compound 3 was used instead of Compound 101.

[0272] Example 9 A composition was produced in the same manner as in Comparative Example 1, except that 0.421 g of Compound 4 was used instead of Compound 101.

[0273] Example 10 A composition was produced in the same manner as in Comparative Example 1, except that 0.457 g of Compound 5 was used instead of Compound 101.

[0274] The initial viscosities (@25 °C) of the comparative examples and examples were all about 25 to 30 cP.

[0275] Evaluation of viscosity change The initial viscosities of the compositions of the comparative examples and the examples were measured, the viscosities after 30 days were measured, and the viscosity changes over time were evaluated and are shown in Table 2. A Brookfield viscometer DV3 was used for the viscosity measurement.

[0276]

Table 2

[0277] Referring to Table 2, it can be seen that the compositions of the comparative examples show a change over time of 10% or more. In particular, in the case of Comparative Example 2, hardening occurred due to hydrogen bonding by OH in the ligand, and evaluation could not be performed. In the cases of Comparative Examples 4 and 5, it is considered that the viscosity increased by 10% or more due to the influence of the crosslinkable moiety in the ligand.

[0278] In the case of the compositions of the examples, since the terminal portions of the ligands contain phenyl groups, benzyl groups, and butyl groups, they are suitable for dispersion in 1,6 - hexanediol diacrylate, and the change in viscosity of the compositions over time was smaller than that of the compositions of the comparative examples.

[0279] Light resistance evaluation Comparative Example 6 The composition of Comparative Example 1 was spin - coated on glass to a thickness of 10 μm and exposed to UV (360 nm max ) to prepare a color conversion layer specimen.

[0280] Comparative Example 7 An attempt was made to spin - coat the color conversion layer using the quantum dot composition of Comparative Example 2, but hardening occurred and a coating film could not be formed.

[0281] Comparative Examples 8 - 10 Specimens were prepared in the same manner as Comparative Example 6, except that the quantum dot compositions of Comparative Examples 3 - 5 were used for the color conversion layer respectively.

[0282] Examples 11 - 15 Specimens were prepared in the same manner as in Comparative Example 6, except that the quantum dot compositions of Examples 6 to 10 were used for the color conversion layer, respectively.

[0283] To evaluate the characteristics of the color conversion layers prepared in Comparative Examples 6, 8 to 10, and Examples 11 to 15, they were exposed to the light of a 100,000 nit high-brightness blue LED backlight that emits more than 10 times the light in the actual use environment for 500 hours, and the results are shown in Table 3.

[0284] Efficiency and the like were measured using a measuring device C9920-2-12 manufactured by Hamamatsu Photonics K.K.

[0285]

Table 3

[0286] From Table 3 above, it can be confirmed that the color conversion layer of the example is superior to the color conversion layer of the comparative example in terms of the light conversion efficiency maintenance rate, and thus the light resistance of the color conversion layer of the example is better. Specifically, in the case of Examples 13 to 15, it was confirmed that the light conversion efficiency maintenance rate was improved by about 14% compared to Comparative Example 1. This is presumably because the presence of two thiol groups at the bonding part increased the bonding force between the ligand compound and the quantum dots.

[0287] In the case of Comparative Examples 6 and 8, the terminal part of the ligand contains a hydrophobic methyl group, but it is not suitable for dispersion in 1,6-hexanediol diacrylate, so the results are considered not to be good.

[0288] When a crosslinkable functional group or a radical stabilizing group is present at the terminal part of the ligand, it is considered to cause a decrease in light resistance.

[0289] The synthesis of a compound according to an embodiment of the present invention, quantum dots coordinated thereby, a composition containing the same, and a color conversion layer formed therefrom have been described.

[0290] Since it is well-known to use general quantum dots in the light-emitting layer of a light-emitting device, or in the color conversion layer and / or color filter of an electronic device, an ordinary technician can easily fabricate a light-emitting device using the quantum dots in the light-emitting layer, or an electronic device using the quantum dots in the color conversion layer and / or color filter.

Description of Reference Numerals

[0291] 10 Light-emitting device 110 First electrode 130 Intermediate layer 150 Second electrode

Claims

1. Dithio C １ -C １６ a linking moiety containing an alkyl moiety, A hydrophilic linking group containing oxygen, and Unsubstituted C ６ -C ４０ Aryl group, unsubstituted C ３ -C ５０ Heteroaryl group, unsubstituted C ２ -C １０ Alkyl group, and / or unsubstituted C ７ -C ５０ Terminal portion containing an arylalkyl group comprising the bonding group and the linking group are linked by an ester bond, and the terminal portion is linked to the linking group, Compound.

2. Said dithio C １ -C １６ The compound according to claim 1, wherein the alkyl of the alkyl moiety has a straight-chain structure or a branched structure.

3. Said dithio C １ -C １６ In the alkyl moiety, one thiol group is C １ -C １６ The compound according to claim 1, wherein the compound is located at the end of the alkyl moiety.

4. Said dithio C １ -C １６ The compound according to claim 1, wherein 2 to 5 carbons are present between the two thiol groups of the alkyl moiety.

5. The hydrophilic linking group containing oxygen is a linking group containing ethylene glycol units and / or propylene glycol units, the compound according to claim 1.

6. The ethylene glycol units and / or propylene glycol units are, independently of each other, 1 to 10 in number, the compound according to claim 5.

7. The non-replaced C ６ -C ４０ The aryl group is a phenyl group, a pentalenyl group, a naphthyl group, an azulenyl group, an indacenyl group, an acenaphthyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a heptalenyl group, a naphthacenyl group, a picenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, or any combination thereof. The compound according to claim 1.

8. The non-replaced C ２ -C １０ The alkyl group is an ethyl group, n-propyl group, isopropyl group, n-butyl group, sec-butyl group, isobutyl group, tert-butyl group, n-pentyl group, tert-pentyl group, neopentyl group, isopentyl group, sec-pentyl group, 3-pentyl group, sec-isopentyl group, n-hexyl group, isohexyl group, sec-hexyl group, tert-hexyl group, n-heptyl group, isoheptyl group, sec-heptyl group, tert-heptyl group, n-octyl group, isooctyl group, sec-octyl group, tert-octyl group, n-nonyl group, isononyl group, sec-nonyl group, tert-nonyl group, n-decyl group, isodecyl group, sec-decyl group, tert-decyl group, or any combination thereof, the compound according to claim 1.

9. The compound according to claim 1, represented by the following Chemical Formula 1: [Chemical Formula 1] In the Chemical Formula 1, A1 is C １ -C １６ represents an alkyl moiety, A2 contains 1 to 6 ethylene glycol units, 1 to 6 propylene glycol units, or any combination thereof, A3 is unsubstituted C ３ -C １０ alkyl group, unsubstituted C ６ -C ２０ aryl group, or unsubstituted C ７ -C ３０ arylalkyl group.

10. The compound according to claim 1, wherein the compound contains any one of the following compounds:

11. Quantum dots coordinated with the compound according to claim 1.

12. The quantum dots according to claim 11, and A crosslinkable monomer, a composition comprising.

13. The composition according to claim 12, wherein the composition further contains a photoinitiator.

14. The crosslinkable monomer is an acrylic monomer, the composition according to claim 12.

15. The quantum dots are A core containing a semiconductor compound, and A shell containing a metal, semi-metal or non-metal oxide, semiconductor compound, or a combination thereof, having a core-shell structure, the composition according to claim 12.

16. The semiconductor compound includes II-VI group semiconductor compounds; III-V group semiconductor compounds; III-VI group semiconductor compounds; I-III-VI group semiconductor compounds; IV-VI group semiconductor compounds; Group IV elements or compounds; or any combination thereof; The oxide of the metal, metalloid or non-metal is, independently of one another, SiO ２ , Al ２ O ３ , TiO ２ , ZnO, MnO, Mn ２ O ３ , Mn ３ O ４ , CuO, FeO, Fe ２ O ３ , Fe ３ O ４ , CoO, Co ３ O ４ , NiO, MgAl ２ O ４ , CoFe ２ O ４ , NiFe ２ O ４ , CoMn ２ O ４ , or any combination thereof, the composition according to claim 15.

17. The semiconductor compound is CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAS, InNSb, InPAs, InPSb, GaAlNP, GaAlNAS, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAS, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAS, InAlNSb, InAlPAs, InAlPSb, InZnP, InGaZnP, InAlZnP, GaS, GaSe, Ga ２ Se ３ , GaTe, InS, InSe, In ２ S ３ , In ２ Se ３ , InTe, InGaS ３ , InGaSe ３ , AgInS, AgInS ２ , CuInS, CuInS ２ , CuGaO ２ , AgGaO ２ , AgAlO ２ , SnS, SnSe, SnTe, PbS, PbSe, PbTe, SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, SnPbSSSe, SnPbSeTe, SnPbSTe, Si, Ge, SiC, SiGe, or any combination thereof, the composition according to claim 15.

18. The semiconductor compound contained in the shell includes CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, or any combination thereof, the composition according to claim 15.

19. The viscosity (@25°C) of the composition is 5 to 80 cP, the composition according to claim 12.

20. A light-emitting element including a first electrode, a second electrode facing the first electrode, and an intermediate layer including a light-emitting layer and intervening between the first electrode and the second electrode, a thin-film transistor, a color conversion layer and / or a color filter, and a touch screen layer, a polarizing layer, or any combination thereof, wherein the thin-film transistor includes a source electrode and a drain electrode, wherein the first electrode of the light-emitting element is electrically connected to the source electrode or the drain electrode of the thin-film transistor, The light-emitting layer, the color conversion layer and / or the color filter include layers manufactured with the composition according to claim 12, an electronic device.

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