KR20200030906A - A surface-treated inorganic nanoemitter and preparation method thereof - Google Patents

Abstract

The present invention relates to an inorganic nano light-emitting body comprising: an inorganic nano crystal; and a ligand bound to a surface of the inorganic nano crystal, wherein the ligand comprises a first ligand and a second ligand. In addition, the first ligand includes a compound represented by chemical formula 1, and the second ligand includes an organic group containing a carboxylate group. The inorganic nano light-emitting body has excellent dispersibility in a solvent.

Description

A surface-treated inorganic nanoemitter and preparation method thereof

The present invention relates to a surface-modified inorganic nano light-emitting body and a method for manufacturing the same.

The inorganic nano light-emitting body or quantum dots may have different energy band gaps by controlling the size and composition, and thus emit light of various wavelength bands. Therefore, such inorganic nano light-emitting bodies or quantum dots are spotlighted as light-emitting materials for various display devices.

On the other hand, in order to use the inorganic nano light-emitting material as a light emitting material, excellent dispersibility for various organic solvents is required, and various studies have been conducted to replace the organic ligand on the surface of the inorganic nano light-emitting body to improve dispersibility.

However, while maintaining a certain level of luminescence quantum efficiency, there has been no report on inorganic nano light-emitting bodies having excellent dispersibility in a solvent containing propylene glycol methyl ether acetate (PEGMA), a solvent for color filter production, and there is still a need for industry. It exists.

An object of the present invention is to provide an inorganic nano light-emitting body excellent in dispersibility in a solvent containing propylene glycol methyl ether acetate (PEGMA) while maintaining good luminescence quantum efficiency.

According to one aspect, the inorganic nanocrystal; And

It includes a ligand bound to the inorganic nanocrystalline surface,

The ligand includes a first ligand and a second ligand,

The first ligand includes a compound represented by Formula 1 below,

The second ligand is provided with an inorganic nano light-emitting body comprising an organic group comprising a carboxylate group:

[Formula 1]

In Chemical Formula 1,

L ₁ is a substituted or unsubstituted C ₁ -C ₁₀ alkylene group, a substituted or unsubstituted C ₂ -C ₁₀ alkenylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkylene group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenylene group, substituted or unsubstituted C ₆ -C ₆₀ An arylene group, and a substituted or unsubstituted C ₁ -C ₆₀ heteroarylene group,

m is an integer selected from 1 to 6, and when m is 2 or more,-[L ₁ -SH] may be the same as or different from each other,

R1 is hydrogen or a binding site with the inorganic nanocrystalline surface,

R ₂ is hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, substituted or unsubstituted C ₁ -C ₁₀ Alkyl group, substituted or unsubstituted C ₂ -C ₁₀ alkenyl group, substituted or unsubstituted C ₂ -C ₁₀ alkynyl group, substituted or unsubstituted C ₁ -C ₁₀ alkoxy group, substituted or unsubstituted C _3- C ₁₀ cycloalkyl group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, a substituted or unsubstituted C ₆ -C ₆₀ arylthio group, and a substituted or unsubstituted C ₁ -C ₆₀ unsubstituted Selected from heteroaryl groups,

n is an integer selected from 0 to 5, and when n is 2 or more, R ₁ is the same or different from each other,

The sum of m and n is 6.

According to another aspect, there is provided a method of manufacturing an inorganic nano light-emitting body comprising; contacting the compound represented by the formula (1) with the inorganic nanocrystal.

According to another aspect, the inorganic nano light-emitting body; And a dispersion solvent.

Inorganic nanocrystals have a dispersibility in a solvent containing propylene glycol methyl ether acetate (PEGMA) by including a first ligand comprising a compound represented by Formula 1 on its surface.

1 is ¹ H-NMR data before and after the surface modification of inorganic nanocrystals capped with oleic acid with phenylethyl mercaptan (PEM).
FIG. 2 (a) is a photograph in natural light for the samples prepared in Example 1, Comparative Examples 1 and 2, and FIG. 2 (b) is a photograph under an on-state UV lamp.
3 is a photoluminescence (PL) spectrum for the samples of Examples 2 to 6 and Comparative Example 3.
4 is a photoluminescence (PL) spectrum for the samples prepared in Examples 7 to 11 and Comparative Example 4.
5 is a photoluminescence (PL) spectrum for the samples prepared in Examples 9, 12 and 13, and Comparative Example 5.
6 is a photoluminescence (PL) spectrum for the samples prepared in Examples 14 to 16 and Comparative Examples 6 to 8.

The present inventive concept described below can apply various transformations and will be described in detail in the detailed description. However, this is not intended to limit this creative idea to a specific embodiment, and it should be understood to include all transformations, equivalents, or substitutes included in the technical scope of the creative idea.

The terms used below are only used to describe specific embodiments, and are not intended to limit the creative ideas. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the following, the terms "comprises" or "have" are intended to indicate the presence of features, numbers, steps, actions, components, parts, components, materials or combinations thereof described in the specification, one or more thereof. It should be understood that the above other features, numbers, steps, operations, components, parts, components, materials or combinations thereof are not excluded in advance.

In the following, “about” or “approximately” is a value provided within an allowable error range for a specific value determined by a technician, taking into account measurement errors and errors associated with a specific amount of measurement (ie, limitations of the measurement system). And average. For example, “about” can mean one or more standard deviations, or within 30%, 20%, 10% or 5% of a given value.

Unless defined otherwise, all terms (technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, terms such as those defined in commonly used dictionaries should be interpreted as meanings corresponding to their meanings in the related technical field and context of the present application, and are interpreted as ideal or excessively formal meanings unless specifically defined herein. It should not be.

Hereinafter, terms such as “first” and “second” may be used to describe various components, but components should not be limited by terms, and distinguish one component from other components Used for purposes.

Hereinafter, an inorganic nano light-emitting body according to exemplary embodiments, a manufacturing method thereof, and a composition including the inorganic nano light-emitting body and a dispersing agent will be described in more detail.

According to one embodiment, the inorganic nanocrystals; And a ligand bound to the surface of the inorganic nanoparticle, wherein the ligand includes a first ligand and a second ligand, and the first ligand includes a compound represented by Formula 1 below, and the second ligand is carboxyl. An inorganic nano light-emitting body comprising an organic group comprising a rate group is provided:

[Formula 1]

In Formula 1, L ₁ , R ₁ , R ₂ , m and n will be described later.

According to one embodiment, the inorganic nanocrystal is selected from a group II-VI compound, a group III-V compound, a group IV-VI compound, a group IV element, a group IV compound and combinations thereof, and alloys thereof It may be, but is not limited to this.

The inorganic nanocrystal is a material capable of absorbing external light and emitting light having a wavelength range of a specific region to the outside, also called a quantum dot. Since the inorganic nanocrystal has a very small size, a quantum confinement effect is exhibited, and the quantum confinement effect means a phenomenon in which the band gap of the object increases when the object becomes smaller than the nanometer size. Accordingly, when light of a wavelength having an energy greater than the band gap of the inorganic nanocrystal is irradiated to the inorganic nanocrystal, the inorganic nanocrystal absorbs the light and transitions to an excited state and emits light of a specific wavelength. While returning to the ground. At this time, the wavelength of the emitted light has a value corresponding to the band gap.

For example, the II-VI compound semiconductor nanocrystals are selected from the group consisting of CdO, CdS, CdSe, CdTe, ZnO, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof. Elemental compounds; CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZn, Bovine compounds; And HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and HgZnSTe and mixtures thereof, may be selected from the group consisting of, or alloys thereof, or an alloy thereof.

For example, the group III-V compound semiconductor nanocrystal is a binary element selected from the group consisting of GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs, InSb, and mixtures thereof; Ternary compounds selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InPAs, InPSb, GaAlNP, and mixtures thereof; And a sub-element compound selected from the group consisting of GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, and mixtures thereof, or May be an alloy of these.

For example, group IV-VI compound semiconductor nanocrystals include binary elements selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof; Ternary compounds selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof; And SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof, or an alloy thereof.

For example, the group IV element may be selected from the group consisting of Si, Ge and mixtures thereof.

For example, the group IV compound may be a binary compound selected from the group consisting of SiC, SiGe, and mixtures thereof, or alloys thereof.

In this case, the binary element compound, the trielement compound, or the quaternary element compound may be present in the particles at a uniform concentration or may be present in the same particle because the concentration distribution is partially divided into different states. Also, one inorganic nanocrystal may have a core / shell structure surrounding another inorganic nanocrystal. The interface between the core and the shell may have a concentration gradient in which the concentration of elements present in the shell decreases toward the center.

The inorganic nanocrystal may include a core-shell structure including a core and a shell covering the core.

According to one embodiment, the inorganic nanocrystals may include a core including a first inorganic nanocrystal and a shell disposed on the core and including a second inorganic nanocrystal.

For example, the first inorganic nanocrystal is CdS, CdSe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdTe, CdSeS, CdSeTe, CdZnS, CdZnSe, GaN, GaP, GaAs, GaInP, GaInN, InP, InA , InZnP and one or more compounds selected from ZnO or alloys thereof,

The second inorganic nanocrystal is at least one compound selected from CdS, CdSe, CdZnS, ZnSe, ZnSeS, ZnS, ZnTe, CdTe, CdO, ZnO, InP, GaN, GaP, GaInP, GaInN, HgS, HgTe and HgSe, or It may contain an alloy of.

According to one embodiment, the inorganic nanocrystals are CdS-ZnS, CdSe-CdS, CdSe-ZnS, CdSe-CdZnS, CdSe-ZnSe, CdSe-ZnSeS, CdSe-ZnTe, CdTe-CdSe, CdTe-ZnS, CdTe-Hg , ZnSe-ZnS, ZnSe-ZnSeS, ZnTe-CdSe, ZnTe-CdTe, HgS-CdS, HgS-ZnS, HgSe-CdS, HgSe-CdSe, HgTe-CdS, GaP-GaN, InP-CdS, InP-CdSe -ZnSe, InP-ZnSeS, InP-ZnSe-ZnS, InP-GaP, InZnP-ZnS, InZnP-ZnSe, InZnP-ZnSeS), or InP-ZnS. For example, the inorganic nanocrystal may include InP-ZnS.

The average particle diameter of the core among the inorganic nanocrystals may be 2 nm to 10 nm, and the average thickness of the shell may be 1 nm to 10 nm. In addition, the average particle diameter of the inorganic nanocrystals may be 3 nm to 20 nm.

Even if the inorganic nanocrystals are made of the same material, the emission wavelength varies depending on the size of the particle size. As the particle size of the inorganic nanocrystals becomes smaller, light of a short wavelength is emitted.

In addition, the shape of the inorganic nanocrystals may be spherical, pyramidal, nanowire, multi-arm or cubic nanoparticles, nanotubes, nanofibers, nanoplatelets, and the like, but is not limited thereto. However, any form generally used in the art may be used.

According to one embodiment, in Formula 1, L ₁ is a substituted or unsubstituted C ₁ -C ₁₀ alkylene group, a substituted or unsubstituted C ₂ -C ₁₀ alkenylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkylene group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenylene group , A substituted or unsubstituted C ₆ -C ₆₀ arylene group, and a substituted or unsubstituted C ₁ -C ₆₀ heteroarylene group, but is not limited thereto.

For example, L ₁ may be a substituted or unsubstituted C ₁ -C ₁₀ alkylene group, or a substituted or unsubstituted C ₂ -C ₁₀ alkenylene group.

For example, L ₁ is a methylene group, an ethylene group, and a propylene group; And a methylene group substituted with a substituent selected from deuterium, methyl group, ethyl group, and propyl group, ethylene group, and propylene group.

According to an embodiment, in Formula 1, m is selected from an integer of 1 to 6, and when m is 2 or more,-[L ₁ -SH] may be the same or different from each other.

For example, m can be 1, 2 or 3.

For example, when m is 2 or more,-[L ₁ -SH] may be all the same.

According to an embodiment, in Formula 1, R ₁ may be hydrogen or a binding site with the inorganic nanocrystalline surface. For example, R ₁ may be a binding site with an inorganic nanocrystalline surface.

According to an embodiment, in Formula 1, R ₂ is hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazo No, substituted or unsubstituted C ₁ -C ₁₀ alkyl group, substituted or unsubstituted C ₂ -C ₁₀ alkenyl group, substituted or unsubstituted C ₂ -C ₁₀ alkynyl group, substituted or unsubstituted C ₁ -C ₁₀ Alkoxy group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkyl group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenyl group, a substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, a substituted or unsubstituted C ₆ -C ₆₀ arylthio group, And it may be selected from substituted or unsubstituted C ₁ -C ₆₀ heteroaryl group.

For example, R ₁ is hydrogen, deuterium, methyl group, ethyl group, n-propyl group, isopropyl group; And a methyl group substituted with a substituent selected from deuterium, methyl group, ethyl group, n-propyl group, and isopropyl group, ethyl group, n-propyl group, isopropyl group; It can be selected from.

For example, R ₁ may be hydrogen.

According to one embodiment, n is selected from an integer of 0 to 5, and when n is 2 or more, R ₁ is the same or different from each other.

According to one embodiment, the sum of m and n may be 6. The value of m and the value of n can be selected such that the sum is 6.

According to one embodiment, the first ligand may be represented by the following formulas 1-1 to 1-3.

[Formula 1-1] [Formula 1-2] [Formula 1-3]

In Chemical Formulas 1-1 to 1-3,

The L ₁₁ to L ₁₃ each refer to the description of L ₁ described above, the R ₁₁ to R ₁₅ each refer to the description of R ₁ described above, and * denotes a bonding site with an inorganic nanocrystalline surface. do.

For example, in Formulas 1-1 to 1-3, all of R ₁₁ to R ₁₅ may be hydrogen.

For example, in Formulas 1-1 to 1-3, L ₁₁ may be *-(CH ₂ ) _2- * ', wherein * and *' are binding sites with adjacent atoms.

According to one embodiment, the second ligand may include an organic group including a carboxylate group.

For example, the second ligand may include an organic group represented by Formula 2 below:

[Formula 2]

In Chemical Formula 2,

L ₂₁ is a substituted or unsubstituted C ₁ -C ₁₀ alkylene group, a substituted or unsubstituted C ₂ -C ₁₀ alkenylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkylene group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenylene group, substituted or unsubstituted C ₆ -C ₆₀ An arylene group, and a substituted or unsubstituted C ₁ -C ₆₀ heteroarylene group,

a21 is an integer selected from 1 to 10, and when a21 is 2 or more, L ₂₁ is the same as or different from each other,

R ₂₁ is hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, substituted or unsubstituted C ₁ -C ₁₀ Alkyl group, substituted or unsubstituted C ₂ -C ₁₀ alkenyl group, substituted or unsubstituted C ₂ -C ₁₀ alkynyl group, substituted or unsubstituted C ₁ -C ₁₀ alkoxy group, substituted or unsubstituted C _3- C ₁₀ cycloalkyl group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, a substituted or unsubstituted C ₆ -C ₆₀ arylthio group, and a substituted or unsubstituted C ₁ -C ₆₀ unsubstituted Heteroaryl group, selected from

b21 is an integer selected from 1 to 10, and when b21 is 2 or more, R ₂₁ is the same as or different from each other,

* Is a binding site with an inorganic nanocrystalline surface.

For example, the second ligand may be represented by the following Chemical Formula 2-1:

L ₂₁₁ is a substituted or unsubstituted C ₁ -C ₈ alkylene group, and is selected from a substituted or unsubstituted C ₂ -C ₈ alkenylene group,

a211 is an integer selected from 1 to 8,

R ₂₁₁ is selected from hydrogen, a substituted or unsubstituted C ₁ -C ₁₀ alkyl group, and a substituted or unsubstituted C ₂ -C ₁₀ alkenyl group,

b211 is an integer selected from 1 to 10.

For example, the second ligand may be represented by the following Chemical Formula 2-2:

[Formula 2-2]

According to one embodiment, in the inorganic nano light-emitting body, the molar ratio of the first ligand and the second ligand may be 99: 1 to 30:70.

For example, the molar ratio of the first ligand and the second ligand is 90:10 to 30:70, 80:20 to 30:70, 70:30 to 30:70, 60:40 to 30:70, 50 : 50 to 30:70, 40:60 to 30:70, 99: 1 to 40:60, 99: 1 to 50:50, 99: 1 to 60:40, 99: 1 to 70:30, 80:20 It may be from 70:30 to 80:20 to 60:40, but is not limited thereto, and any combination of weight ratios may be included in the range.

As will be described later, the inorganic nano light-emitting body according to one embodiment may be prepared by substituting a part of an organic group including a carboxylate group such as oleic acid for capping inorganic nanocrystals with a benzo-thiol-based ligand, and thus surface-modified Inorganic nanocrystals have improved dispersibility for propylene glycol methyl ether acetate (PGMEA) compared to before surface exchange. In addition, the benzo-thiol-based ligand (first ligand) bound to the surface of the inorganic nano light-emitting body has structural stability by π-π mutual attraction between benzene rings, and thus may have improved luminous efficiency and long life characteristics.

In addition, the inorganic nano light-emitting body according to an embodiment may have a full width of half maximum (FWHM) of an emission wavelength spectrum of about 45 nm or less, and may improve color purity or color reproducibility within this range. In addition, since the light emitted from the inorganic nano light-emitting body according to one embodiment is emitted in all directions, the optical viewing angle may be improved.

According to an aspect, a method of manufacturing an inorganic nano light-emitting body is provided, comprising; contacting an inorganic nanocrystal and a benzo-thiol-based compound capped with an organic compound containing a carboxylate group.

According to an embodiment, prior to the contacting, the step of maintaining the inorganic nanocrystals capped with the organic compound containing the carboxylate group under vacuum at room temperature for 1 hour may be included.

According to an embodiment, the inorganic nanocrystal and the benzo-thiol-based compound may have a weight ratio of 1: 5 to 1:50, but are not limited thereto.

For example, the inorganic nanocrystal and the benzo-thiol-based compound are 1: 5 to 1:40, 1: 5 to 1:30, 1: 5 to 1:20, 1: 5 to 1:15, and 1: 5 to 1:13, 1: 5 to 1:10, 1: 5 to 1: 9, 1: 5 to 1: 8, or may have a weight ratio of 1: 5 to 1: 7, but is not limited thereto. , Any weight ratio range included in the above range may be included.

According to one embodiment, the contacting may include reacting the inorganic nanocrystal and the benzo-thiol-based compound at 180 ° C to 220 ° C for 1 hour to 3 hours in an inert atmosphere.

For example, the reaction temperature may be 180 ° C to 210 ° C, 180 ° C to 200 ° C, 190 ° C to 220 ° C, or 200 ° C to 220 ° C.

For example, the reaction time may be 1 hour to 2 hours, or 2 hours to 3 hours, or 2 hours.

For example, the inert atmosphere may be a nitrogen atmosphere or an argon atmosphere.

According to one embodiment, the benzo-thiol-based compound may have a concentration of more than 2mmol and less than 10mmol. For example, the benzo-thiol compounds are 3mmol or more and less than 10mmol, 4mmol or more and less than 10mmol, 5mmol or more and less than 10mmol, 2mmol or more and 9mmol or less, 2mmol or more 8mmol or less, 2mmol or more 7mmol or less, 2mmol or more, 6mmol or less, 2mmol or more and 5mmol or less , 3mmol to 9mmol, 3mmol to 8mmol, 3mmol to 7mmol, 3mmol to 6mmol, 4mmol to 8mmol, 4mmol to 7mmol, 4mmol to 6mmol, or 5mmol.

According to an embodiment, after the contacting step, the step of washing the inorganic nanocrystals surface-modified with the benzo-thiol-based compound with an organic solvent may be further included.

For example, the organic solvent may include, but is not limited to, ethanol, acetone, chloroform, acetonitrile, hexane, toluene, propylene glycol methyl ether acetate (PGMEA), or combinations thereof.

According to another aspect, the inorganic nano light-emitting body; And an organic solvent; The organic solvent is provided with a composition comprising propylene glycol methyl ether acetate (PEMEA).

General definition of substituents

C ₁ -C ₁₀ alkyl group used herein refers to a linear or branched aliphatic hydrocarbon monovalent group having 1 to 10 carbon atoms, and specific examples include methyl group, ethyl group, propyl group, isobutyl group, and sec-butyl. Group, ter-butyl group, pentyl group, iso-amyl group, hexyl group, and the like. C ₁ -C ₁₀ alkylene group used herein refers to a divalent group having the same structure as the C ₁ -C ₆₀ alkyl group.

C ₂ -C ₁₀ alkenyl group used herein refers to a hydrocarbon group including at least one carbon double bond at the middle or terminal of the C ₂ -C ₁₀ alkyl group, and specific examples thereof include an ethenyl group, a propenyl group, and a butenyl group. Etc. are included. C ₂ -C ₁₀ alkenylene group used herein refers to a divalent group having the same structure as the C ₂ -C ₁₀ alkenyl group.

In the present specification, a C ₂ -C ₁₀ alkynyl group means a hydrocarbon group including at least one carbon triple bond at the middle or terminal of the C ₂ -C ₁₀ alkyl group, and specific examples thereof include ethynyl group, propynyl group, and the like. do. C ₂ -C ₁₀ alkynylene group used herein refers to a divalent group having the same structure as the C ₂ -C ₁₀ alkynyl group.

C ₁ -C ₁₀ alkoxy group used herein refers to a monovalent group having the formula -OA ₁₀₁ (where A ₁₀₁ is the C ₁ -C ₁₀ alkyl group), and specific examples thereof include a methoxy group and an ethoxy group. , Isopropyloxy group, and the like.

C ₃ -C ₁₀ cycloalkyl group used herein refers to a monovalent saturated hydrocarbon monocyclic group having 3 to 10 carbon atoms, and specific examples thereof include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cyclo group. Heptyl groups and the like. The C ₃ -C ₁₀ cycloalkylene group of the specification and the second having the same structure as the above C ₃ -C ₁₀ cycloalkyl group means a group.

C ₁ -C ₁₀ heterocycloalkyl group used herein refers to a monovalent monocyclic group having 1 to 10 carbon atoms including at least one hetero atom selected from N, O, Si, P and S as a ring-forming atom. , Specific examples thereof include 1,2,3,4-oxatriazolidinyl group (1,2,3,4-oxatriazolidinyl), tetrahydrofuranyl group, tetrahydrothiophenyl group, and the like. AC ₁ -C ₁₀ heterocycloalkylene group used herein refers to a divalent group having the same structure as the C ₁ -C ₁₀ heterocycloalkyl group.

C ₃ -C ₁₀ cycloalkenyl group used herein refers to a monovalent monocyclic group having 3 to 10 carbon atoms, which means a group having at least one double bond in a ring, but no aromaticity. Examples include cyclopentenyl group, cyclohexenyl group, cycloheptenyl group, and the like. AC ₃ -C ₁₀ cycloalkenylene group used herein refers to a divalent group having the same structure as the C ₃ -C ₁₀ cycloalkenyl group.

C ₁ -C ₁₀ heterocycloalkenyl group in the present specification is a monovalent monocyclic group having 1 to 10 carbon atoms including at least one hetero atom selected from N, O, Si, P and S as a ring-forming atom, a ring Has at least one double bond in it. Specific examples of the C ₁ -C ₁₀ heterocycloalkenyl group include 4,5-dihydro-1,2,3,4-oxatriazolyl group, 2,3-dihydrofuranyl group, and 2,3-dihydro And thiophenyl groups. AC ₁ -C ₁₀ heterocycloalkenylene group used herein refers to a divalent group having the same structure as the C ₁ -C ₁₀ heterocycloalkenyl group.

C ₆ -C ₆₀ aryl group used herein refers to a monovalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms, and C ₆ -C ₆₀ arylene group having 6 to 60 carbocyclic aromatic systems having 6 to 60 carbon atoms. It means a divalent group having. Specific examples of the C ₆ -C ₆₀ aryl group include a phenyl group, a naphthyl group, anthracenyl group, phenanthrenyl group, pyrenyl group, chrysenyl group, and the like. When the C ₆ -C ₆₀ aryl group and the C ₆ -C ₆₀ arylene group include two or more rings, the two or more rings may be condensed with each other.

C ₁ -C ₆₀ heteroaryl group used herein includes a monovalent group having at least one hetero atom selected from N, O, Si, P, and S as a ring-forming atom and having a heterocyclic aromatic system having 1 to 60 carbon atoms. Means, C ₁ -C ₆₀ heteroarylene group includes at least one hetero atom selected from N, O, Si, P and S as a ring-forming atom and has 2 to 60 carbon atoms having a heterocyclic aromatic system Means group. Specific examples of the C ₁ -C ₆₀ heteroaryl group include a pyridinyl group, pyrimidinyl group, pyrazinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, and the like. When the C ₁ -C ₆₀ heteroaryl group and the C ₁ -C ₆₀ heteroarylene group include two or more rings, two or more rings may be condensed with each other.

In the specification C ₆ -C ₆₀ aryloxy group -OA, point ₁₀₂ (where, A ₁₀₂ is the C ₆ -C ₆₀ aryl group), a C ₆ -C ₆₀ arylthio group (arylthio) is -SA ₁₀₃ (where , A ₁₀₃ refers to the C ₆ -C ₆₀ aryl group).

In the present specification, the substituted C ₁ -C ₁₀ alkylene group, substituted C ₂ -C ₁₀ alkenylene group, substituted C ₃ -C ₁₀ cycloalkylene group, substituted C ₁ -C ₁₀ heterocycloalkylene group, substitution C ₃ -C ₁₀ cycloalkenylene group, substituted C ₁ -C ₁₀ heterocycloalkenylene group, substituted C ₆ -C ₆₀ arylene group, substituted C ₁ -C ₆₀ heteroarylene group, substituted C _1- C ₁₀ alkyl group, substituted C ₂ -C ₁₀ alkenyl group, substituted C ₂ -C ₁₀ alkynyl group, substituted C ₁ -C ₁₀ alkoxy group, substituted C ₃ -C ₁₀ cycloalkyl group, substituted C ₁ -C ₁₀ heterocycloalkyl group, substituted C ₃ -C ₁₀ cycloalkenyl group, substituted C ₁ -C ₁₀ heterocycloalkenyl group, substituted C ₆ -C ₆₀ aryl group, substituted C ₆ -C ₆₀ aryloxy group, substitution At least one of a C ₆ -C ₆₀ arylthio group, and a substituted C ₁ -C ₆₀ heteroaryl group,

Deuterium (-D), -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, C ₁ -C ₁₀ alkyl group, C _2- C ₁₀ alkenyl group, C ₂ -C ₁₀ alkynyl group and C ₁ -C ₁₀ alkoxy group;

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ hetero cycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heteroaryl cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come T, C ₁ -C ₆₀ heteroaryl group, -Si (Q ₁₁ ) (Q ₁₂ ) (Q ₁₃ ), -N (Q ₁₁ ) (Q ₁₂ ), -B (Q ₁₁ ) (Q ₁₂ ), -C (= O) C ₁ -C ₁₀ alkyl group, C ₂ -C ₁₀ , substituted with at least one selected from (Q ₁₁ ), -S (= O) ₂ (Q ₁₁ ) and -P (= O) (Q ₁₁ ) (Q ₁₂ ) Alkenyl group, C ₂ -C ₁₀ alkynyl group and C ₁ -C ₁₀ alkoxy group;

C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryl Oxy group, C ₆ -C ₆₀ arylthio group, and C ₁ -C ₆₀ heteroaryl group;

Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, C ₁ -C ₁₀ alkyl group, C ₂ -C ₁₀ alkenyl group , C ₂ -C ₁₀ alkynyl group, C ₁ -C ₁₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heterocyclo alkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ aryl come T, C ₁ -C ₆₀ heteroaryl _{group, -Si (Q 21) (Q} 22) (Q ₂₃ ), -N (Q ₂₁ ) (Q ₂₂ ), -B (Q ₂₁ ) (Q ₂₂ ), -C (= O) (Q ₂₁ ), -S (= O) ₂ (Q ₂₁ ) and -P C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ substituted with at least one selected from (= O) (Q ₂₁ ) (Q ₂₂ ) hetero cycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₆ -C ₆₀ aryloxy, C ₆ -C ₆₀ arylthio, and C ₁ -C ₆₀ heteroaryl group; And

-Si (Q ₃₁ ) (Q ₃₂ ) (Q ₃₃ ), -N (Q ₃₁ ) (Q ₃₂ ), -B (Q ₃₁ ) (Q ₃₂ ), -C (= O) (Q ₃₁ ), -S (= O) ₂ (Q ₃₁ ) and -P (= O) (Q ₃₁ ) (Q ₃₂ );

Is selected from

The Q ₁₁ to Q ₁₃ , Q ₂₁ to Q ₂₃ and Q ₃₁ to Q ₃₃ are independently of each other, hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, army Dino group, hydrazino group, hydrazono group, C ₁ -C ₁₀ alkyl group, C ₂ -C ₁₀ alkenyl group, C ₂ -C ₁₀ alkynyl group, C ₁ -C ₁₀ alkoxy group, C ₃ -C ₁₀ cycloalkyl group, C ₁ -C ₁₀ heterocycloalkyl group, C ₃ -C ₁₀ cycloalkenyl group, C ₁ -C ₁₀ heterocycloalkenyl group, C ₆ -C ₆₀ aryl group, C ₁ -C ₆₀ heteroaryl group, biphenyl group and terphenyl group It can be selected from.

In the present specification, "biphenyl group" means "phenyl group substituted with a phenyl group". The "biphenyl group" belongs to a "substituted phenyl group" in which the substituent is "C ₆ -C ₆₀ aryl group".

“Terphenyl group” in the present specification means “phenyl group substituted with a biphenyl group”. The "terphenyl group" belongs to a "substituted phenyl group" in which the substituent is "C ₆ -C ₆₀ aryl group substituted with a C ₆ -C ₆₀ aryl group".

* And * 'in the present specification, unless otherwise defined, means a binding site with an adjacent atom in the chemical formula.

[Example]

Evaluation Example 1  (Evaluation of surface modification)

For InP-ZnS inorganic nanocrystals capped with oleic acid, ¹ H-NMR was measured before and after surface modification with phenylethyl mercaptan (PEM), and the results are shown in FIG. 1. Referring to 1, it can be seen that in the NMR of oleic acid-capped InP-ZnS inorganic nanocrystals, a peak indicating an unsaturated hydrocarbon moiety of oleic acid was observed at around 5.4 ppm, and after modifying the PEM surface, 7.0 ~ which represents a benzene ring in the PEM. Multiple peaks at 7.5 ppm were also observed in the surface-modified inorganic nanocrystals.In addition, the peak area was calculated from the NMR data measured after the surface modification, and the content of oleic acid and PEM was calculated. After the surface modification, oleic acid and PEM It was confirmed that silver was present at 28.32 mol% and 71.68 mol%.

Example 1

100 mg of InP-ZnS inorganic nanocrystals capped with oleic acid were mixed in 1-octadecene. Subsequently, phenylethyl mercaptan (PEM) (691.15 mg, 5 mmol) was added at 100 ° C. under argon atmosphere, stirred, and then washed with an organic solvent. Thereafter, the resulting product was dispersed in a PGMEA solvent to prepare a sample of Example 1.

Comparative Examples 1 and 2

Samples of Comparative Examples 2 and 3 were prepared in the same manner as in Example 1, except that 2-mercaptoethanol (ME) and 3-mercaptopropionic acid (MPA) were used instead of PEM, respectively.

Evaluation Example 2 (PGMEA solvent dispersibility evaluation according to type of ligand)

For the samples prepared in Example 1, Comparative Examples 1 and 2, the emission wavelength, half width, and emission quantum efficiency were calculated and are shown in the following table. In addition, the samples prepared in Examples 1, Comparative Examples 1 and 2 were photographed in natural light and photographed under an on-state UV lamp, and then shown in FIGS. 2 (a) and 2 (b).

The photoluminescence spectrum was obtained using QE-2000 (Otsuka Electronics) at an irradiation wavelength of 365 nm.

Quantum efficiency is the number of photons emitted during photoluminescence from a sample divided by the number of photons absorbed by the sample. Quantum efficiency was measured using QE-2000 (Otsuka Electronics).

Sample Ligand Emission wavelength
(nm) Half width
(nm) radiation
Quantum efficiency
(%) Example 1 PEM 519.36 43.54 40.85 Comparative Example 1 ME - - - Comparative Example 2 MPA - - -

As shown in the above table, in Comparative Examples 1 and 2, since the inorganic nano light-emitting body was not dispersed in the PGMEA, emission wavelength, half width, and emission quantum efficiency data could not be obtained. In contrast, it can be seen that in the case of an inorganic nano light-emitting body including PEM as a ligand, dispersibility for PGMEA is excellent.

Example 2

100 mg of InP-ZnS inorganic nanocrystals capped with oleic acid were mixed in 1-octadecene. Subsequently, 69.12 mg (0.5 mmol) of phenylethyl mercaptan (PEM) was added under an argon atmosphere at 200 ° C. and stirred for 3 hours, followed by washing with an organic solvent. Thereafter, the sample of Example 2 was prepared by dispersing the resulting product in a PGMEA solvent.

Examples 3 to 6

Samples of Examples 3 to 6 by the same method as Example 2, except that the content of PEM was changed to 276.46 mg (2 mmol), 691.15 mg (5 mmol), 1382.30 mg (10 mmol), and 2764.60 mg (20 mmol). Was prepared.

Comparative Example 3

The InP-ZnS inorganic nanocrystal used in Example 2, stored in a hexane solvent, was used as a sample of Comparative Example 3.

Evaluation Example 2  (Evaluation of quantum efficiency according to PEM ligand concentration)

For the samples of Examples 2 to 6 and Comparative Example 3, photoluminescence (PL) spectra were obtained, which are shown in FIG. 3. In addition, for the samples of Examples 2 to 6 and Comparative Example 3, the emission wavelength, the half width of the emission light spectrum, and the photoluminescence quantum efficiency were measured and described in Table 2 below.

Sample Ligand addition amount menstruum Luminous wavelength
(nm) Half width
(nm) Emission quantum efficiency
(%) opponent
Quantum efficiency
(%) Comparative Example 3 - Hexane 524.96 40.95 80.43 100 Example 2 0.5mmol PGMEA 533.07. 41.90 35.23 43.80 Example 3 2mmol 532.22 43.05 39.49 49.10 Example 4 5mmol 525.68 41.99 60.23 74.89 Example 5 10mmol 527.57 43.56 52.77 65.61 Example 6 20mmol 530.89 44.67 44.01 54.72

As shown in the above table, it can be seen that when the amount of PEM ligand added is less than 5 mmol, the luminescence quantum efficiency is significantly lowered, and even when it exceeds 10 mmol, the luminescence quantum efficiency is significantly lowered. Therefore, it can be seen that the optimum content of the PEM ligand is around 5 mmol.

Example 7

100 mg of InP-ZnS inorganic nanocrystals capped with oleic acid were mixed in 1-octadecene. Subsequently, 691.15 mg (5 mmol) of phenylethyl mercaptan (PEM) was added under an argon atmosphere at 200 ° C., stirred for 1 hour, and then washed with an organic solvent. Thereafter, the sample of Example 7 was prepared by dispersing the resulting product in a PGMEA solvent.

Examples 8 to 11

Samples of Examples 8 to 11 were prepared in the same manner as in Example 7, except that the reaction times were changed to 2 hours, 3 hours, 6 hours, and 9 hours.

Comparative Example 4

The InP-ZnS inorganic nanocrystal used in Example 7 stored in hexane solvent was used as a sample of Comparative Example 4.

Evaluation Example 3  (Evaluation of quantum efficiency according to reaction time)

For the samples prepared in Examples 7 to 11 and Comparative Example 4, a photoluminescence (PL) spectrum was obtained, which is shown in FIG. 4. In addition, for the samples of Examples 7 to 11 and Comparative Example 4, the emission wavelength, the half width of the emission light spectrum, and the photoluminescence quantum efficiency were measured and are described in Table 3 below.

Sample Reaction time
(hr) menstruum Luminous wavelength
(nm) Half width
(nm) Emission quantum efficiency
(%) opponent
Quantum efficiency
(%) Comparative Example 4 - Hexane 526.21 41.71 82.26 100 Example 7 One PGMEA 527.92 42.26 53.76 65.35 Example 8 2 527.63 42.66 60.89 74.02 Example 9 3 528.80 42.52 54.03 65.68 Example 10 6 532.11 45.30 24.77 30.11 Example 11 9 531.29 45.24 10.99 13.36

As shown in the above table, it was confirmed that the reaction time is 2 hours, and has the highest quantum efficiency. On the other hand, it was confirmed that the quantum efficiency is significantly reduced when the reaction time exceeds 3 hours. This is considered to be because when the reaction time exceeds 3 hours, the content of the ligand decreases on the surface of the inorganic nano light-emitting body due to the vaporization of the ligand, and as a result, the dispersibility for PGMEA decreases.

Example  12

100 mg of InP-ZnS inorganic nanocrystals capped with oleic acid were mixed in 1-octadecene. Subsequently, 691.15 mg (5 mmol) of phenylethyl mercaptan (PEM) was added under an argon atmosphere at 220 ° C., stirred for 3 hours, and then washed with an organic solvent. Thereafter, the sample of Example 12 was prepared by dispersing the resulting product in a PGMEA solvent.

Example 13

Samples of Example 13 were prepared by the same method as Example 12, except that the reaction temperature was changed to 250 ° C.

Comparative Example 5

The InP-ZnS inorganic nanocrystal used in Example 12, stored in a hexane solvent, was used as a sample of Comparative Example 5.

Evaluation Example 4  (Evaluation of quantum efficiency according to reaction temperature)

For the samples prepared in Examples 9, 12 and 13, and Comparative Example 5, a photoluminescence (PL) spectrum was obtained, which is shown in FIG. 5. In addition, the samples of Examples 9, 12, and 13, and Comparative Example 5 were measured and measured in the emission wavelength, half-width of the emission light spectrum, and photoluminescence quantum efficiency.

Sample Reaction temperature
(℃) menstruum Luminous wavelength
(nm) Half width
(nm) Emission quantum efficiency
(%) opponent
Quantum efficiency
(%) Comparative Example 5 - Hexane 526.21 41.71 82.26 100 Example 9 200 PGMEA 528.80 42.52 54.03 65.68 Example 12 220 528.72 44.13 50.00 60.78 Example 13 250 529.53 45.56 28.77 34.97

As shown in the table, it was confirmed that the quantum efficiency decreased as the reaction temperature gradually increased at 200 ° C. This is considered to be due to the decrease in dispersibility of the inorganic nano light-emitting body due to the vaporization of the ligand.

Examples 14 to 16

100 mg of InP-ZnS inorganic nanocrystals capped with oleic acid having emission wavelengths of 534 nm, 593 nm, and 615 nm were mixed in 1-octadecene. Subsequently, 691.15 mg (5 mmol) of phenylethyl mercaptan (PEM) was added under an argon atmosphere at 200 ° C., stirred for 2 hours, and then washed with an organic solvent. Subsequently, the samples of Examples 14 to 16 were respectively prepared by dispersing the resulting product in a PGMEA solvent.

Comparative Example 6

The InP-ZnS inorganic nanocrystal used in Example 14, stored in a hexane solvent, was used as a sample of Comparative Example 6.

Comparative example  7

The InP-ZnS inorganic nanocrystal used in Example 15, stored in a hexane solvent, was used as a sample of Comparative Example 7.

Comparative example  8

The InP-ZnS inorganic nanocrystal used in Example 16, stored in hexane solvent, was used as a sample of Comparative Example 8.

Evaluation Example 5  (Evaluation of quantum efficiency according to emission wavelength)

For the samples prepared in Examples 14 to 16, and Comparative Examples 6 to 8, photoluminescence (PL) spectra were obtained, which are shown in FIG. 6. In addition, for the samples of Examples 14 to 16 and Comparative Examples 6 to 8, the emission wavelength, the half width of the emitted light spectrum, and the photoluminescence quantum efficiency were measured and described in Table 5 below.

Sample Luminous wavelength
(nm) menstruum Luminous wavelength
(nm) Half width
(nm) Emission quantum efficiency
(%) opponent
Quantum efficiency
(%) Comparative Example 6 534nm Hexane 534.83 41.99 84.61 100 Example 14 PGMEA 536.22 42.93 49.85 58.92 Comparative Example 7 593nm Hexane 593.44 49.62 77.69 100 Example 15 PGMEA 594.45 49.19 60.30 77.62 Comparative Example 8 615nm Hexane 615.01 52.19 70.99 100 Example 16 PGMEA 616.50 51.39 54.05 76.14

As shown in the above table, it was confirmed that the green, orange, and red light-emitting inorganic nano light-emitting bodies including PEM exhibit excellent quantum efficiency retention rates.

Claims (15)

Inorganic nanocrystals; And
It includes a ligand bound to the inorganic nanocrystalline surface,
The ligand includes a first ligand and a second ligand,
The first ligand includes a compound represented by Formula 1 below,
The second ligand comprises an organic group including a carboxylate group, an inorganic nano light-emitting body:
[Formula 1]

In Chemical Formula 1,
L ₁ is a substituted or unsubstituted C ₁ -C ₁₀ alkylene group, a substituted or unsubstituted C ₂ -C ₁₀ alkenylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkylene group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenylene group, substituted or unsubstituted C ₆ -C ₆₀ An arylene group, and a substituted or unsubstituted C ₁ -C ₆₀ heteroarylene group,
m is an integer selected from 1 to 6, and when m is 2 or more,-[L ₁ -SH] may be the same as or different from each other,
R ₁ is hydrogen or a binding site with the inorganic nanocrystal,
R ₂ is hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, substituted or unsubstituted C ₁ -C ₁₀ Alkyl group, substituted or unsubstituted C ₂ -C ₁₀ alkenyl group, substituted or unsubstituted C ₂ -C ₁₀ alkynyl group, substituted or unsubstituted C ₁ -C ₁₀ alkoxy group, substituted or unsubstituted C _3- C ₁₀ cycloalkyl group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, a substituted or unsubstituted C ₆ -C ₆₀ arylthio group, and a substituted or unsubstituted C ₁ -C ₆₀ unsubstituted Selected from heteroaryl groups,
n is an integer selected from 0 to 5, and when n is 2 or more, R ₁ is the same or different from each other,
The sum of m and n is 6. According to claim 1,
The inorganic nanocrystal is an inorganic nano light-emitting body selected from group II-VI compounds, group III-V compounds, group IV-VI compounds, group IV elements, group IV compounds and combinations thereof, and alloys thereof. According to claim 1,
The inorganic nanocrystal comprises a core including a first inorganic nanocrystal and a shell disposed on the core and including a second inorganic nanocrystal, the inorganic nano light-emitting body. According to claim 1,
The first inorganic nanocrystal is CdS, CdSe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdTe, CdSeS, CdSeTe, CdZnS, CdZnSe, GaN, GaP, GaAs, GaInP, GaInN, InP, InAs, Inn One or more compounds selected from or alloys thereof,
The second inorganic nanocrystal is one or more compounds selected from CdS, CdSe, CdZnS ZnSe, ZnSeS, ZnS, ZnTe, CdTe, CdO, ZnO, InP, GaN, GaP, GaInP, GaInN, HgS, HgTe, and HgSe An inorganic nano light-emitting body comprising an alloy. According to claim 1,
The inorganic nanocrystals have an average particle diameter of 3 nm to 20 nm, an inorganic nano light-emitting body. According to claim 1,
In Chemical Formula 1, L ₁ is a methylene group, an ethylene group, and a propylene group; And a C ₁ -C ₃ alkyl group-substituted methylene group, ethylene group, and propylene group. According to claim 1,
The first ligand is an inorganic nano light-emitting body represented by the following Formulas 1-1 to 1-3:
[Formula 1-1] [Formula 1-2] [Formula 1-3]

In Chemical Formulas 1-1 to 1-3,
The L ₁₁ to L ₁₃ refer to the description of L ₁ in claim ₁ , respectively, and the R ₁₁ to R ₁₅ refer to the description of R ₁ in claim ₁ , respectively. The method of claim 7,
The R ₁₁ to R ₁₅ are all hydrogen, the inorganic nano light-emitting body. According to claim 1,
The second ligand comprises an organic group represented by the following formula (2), inorganic nano light-emitting body:
[Formula 2]

In Chemical Formula 2,
L ₂₁ is a substituted or unsubstituted C ₁ -C ₁₀ alkylene group, a substituted or unsubstituted C ₂ -C ₁₀ alkenylene group, a substituted or unsubstituted C ₃ -C ₁₀ cycloalkylene group, a substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkylene group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenylene group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenylene group, substituted or unsubstituted C ₆ -C ₆₀ An arylene group, and a substituted or unsubstituted C ₁ -C ₆₀ heteroarylene group,
a21 is an integer selected from 1 to 10, and when a21 is 2 or more, L ₂₁ is the same as or different from each other,
R ₂₁ is hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, substituted or unsubstituted C ₁ -C ₁₀ Alkyl group, substituted or unsubstituted C ₂ -C ₁₀ alkenyl group, substituted or unsubstituted C ₂ -C ₁₀ alkynyl group, substituted or unsubstituted C ₁ -C ₁₀ alkoxy group, substituted or unsubstituted C _3- C ₁₀ cycloalkyl group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkyl group, substituted or unsubstituted C ₃ -C ₁₀ cycloalkenyl group, substituted or unsubstituted C ₁ -C ₁₀ heterocycloalkenyl group, substituted or unsubstituted C ₆ -C ₆₀ aryl group, a substituted or unsubstituted C ₆ -C ₆₀ aryloxy group, a substituted or unsubstituted C ₆ -C ₆₀ arylthio group, and a substituted or unsubstituted C ₁ -C ₆₀ unsubstituted Heteroaryl group, selected from
b21 is an integer selected from 1 to 10, and when b21 is 2 or more, R ₂₁ is the same as or different from each other,
* Is a binding site with an inorganic nanocrystalline surface. According to claim 1,
The first ligand and the second ligand have a molar ratio of 99: 1 to 30:70, an inorganic nano light-emitting body. Including the step of contacting the inorganic nano-crystal and benzo-thiol-based compound capped with an organic compound containing a carboxylate group; comprising, a method for producing an inorganic nano light-emitting body. The method of claim 11,
The inorganic nano-crystal and the benzo-thiol-based compound has a weight ratio of 1: 5 to 1:50, a method for producing an inorganic nano light-emitting body. The method of claim 11,
The contacting step, the inorganic nano-crystal and the benzo-thiol-based compound comprises a step of reacting in an inert atmosphere for 1 hour to 3 hours under 180 ° C to 220 ° C, the method of manufacturing an inorganic nano light-emitting body. The method of claim 11,
The benzo-thiol-based compound has a concentration of more than 2mmol and less than 10mmol, a method for producing an inorganic nano light-emitting body. The inorganic nano light-emitting body according to any one of claims 1 to 10; And
Organic solvents;
The organic solvent is a composition comprising propylene glycol methyl ether acetate (PGMEA).

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