KR102009320B1 - Nano particle and manufacturing of the same - Google Patents

Abstract

Nanoparticles according to an embodiment of the present invention comprises a core, a shell surrounding the core and a tridentate ligand bonded to the shell.

Description

NANO PARTICLE AND MANUFACTURING OF THE SAME

The present invention relates to nanoparticles and a method for manufacturing the same, and more particularly, to a nanoparticle using a quantum dot or quantum rod and a method for producing the same.

Quantum dots (QDs) or quantum rods (QRSs) are nano-sized semiconductor particles of group II-VI, III-V, I-III-VI, and IV-VI semiconductor particles. It refers to the particles that make up, it is divided into a shell (shell) for protecting the core and an organic binder (ligand) to help dispersion.

These quantum nanoparticles generate very strong fluorescence because the extinction coefficient is 100 to 1000 times higher and the quantum efficiency is higher than that of general dyes. Can shine all In addition, when the particles of different sizes are made to emit light with one wavelength, they can emit various colors at once. Therefore, various applications such as LED lighting, liquid crystal display light sources, and display light emitting device materials are being studied. As it has a problem of optical efficiency deterioration, it is currently limited in commercialization.

When the core reacts with oxygen, the quantum nanoparticles decrease the fluorescence lifetime and color reproducibility due to the decrease in quantum efficiency and the change in fluorescence wavelength. To compensate for this, the shell and the organic binder are conventionally prevented from oxidizing the core. However, in the presence of high temperature and moisture, the organic binder is separated from the shell and is lost. Oxygen penetrates through the portion to cause oxidation of the core. do.

As shown in FIGS. 1 and 2, in the metal crystal having the same component, the bulk particles and the nanoparticles have the same oxidation to oxygen, but the nanoparticles can react with the oxygen in comparison with the large particles. The effective surface area is greater. Therefore, even if a small amount of oxidation proceeds to the nanoparticles have a large effect on the overall physical properties, there is a problem that the decrease in the quantum efficiency and the change in the fluorescence wavelength.

The present invention provides a nanoparticle and a method of manufacturing the same that can prevent the reduction of quantum efficiency due to external environment such as heat and moisture of quantum dots or quantum rods.

In order to achieve the above object, a nanoparticle according to an embodiment of the present invention includes a core, a shell surrounding the core, and a tridentate ligand bonded to the shell.

The tridentate organic binder is represented by the following Chemical Formula 1.

,

또는

중 선택된 어느 하나로 이루어지고 이때, n은 1 내지 3이다. 또한, Y는 CH₂, O 또는 N 중 선택된 어느 하나로 이루어지고, X는 PH₂, SH 또는 NH₂ 중 선택된 어느 하나로 이루어진다.Where R is

,

or

And any one selected from among n is 1 to 3. In addition, Y is made of any one selected from CH ₂ , O or N, X is made of any one selected from PH ₂ , SH or NH ₂ .

The core is made of any one or more of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb.

The shell is CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaAs, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb, SiO ₂ , Al ₂ O ₃ , TiO ₂ , ZnO, MnO, Mn ₂ O ₃ , CuO, FeO, Fe ₂ O ₃ , Fe ₃ O ₄ , Mn ₃ O ₄ , CoO, Co ₃ O ₄ , NiO, MgAl ₂ O ₄ , CoFe ₂ O ₄ , NiFe _It is made of at least one of ₂ O ₄ , CoMn ₂ O ₄ .

The tridentate organic binder is composed of at least one of hydrophobic, hydrophilic, and silicon-based organic binders.

The nanoparticles consist of quantum dots or quantum rods.

In addition, the method for producing nanoparticles according to an embodiment of the present invention is a method for producing nanoparticles including a core, a shell, and an organic binder, wherein the organic binder is replaced by a single-dentate organic binder bonded to the shell by a tridentate organic binder. To prepare.

In addition, the method for preparing nanoparticles according to an embodiment of the present invention is a method for preparing nanoparticles including a core, a shell, and a tridentate organic binder, wherein the tridentate organic binder is directly introduced during synthesis of the core and the shell. Synthesize by

The tridentate organic binder is represented by the following Chemical Formula 1.

[Formula 1]

,

또는

중 선택된 어느 하나로 이루어지고 이때, n은 1 내지 3이다. 또한, Y는 CH₂, O 또는 N 중 선택된 어느 하나로 이루어지고, X는 PH₂, SH 또는 NH₂ 중 선택된 어느 하나로 이루어진다.Where R is

,

or

And any one selected from among n is 1 to 3. In addition, Y is made of any one selected from CH ₂ , O or N, X is made of any one selected from PH ₂ , SH or NH ₂ .

The core is made of any one or more of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb.

The shell is CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaAs, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb, SiO ₂ , Al ₂ O ₃ , TiO ₂ , ZnO, MnO, Mn ₂ O ₃ , CuO, FeO, Fe ₂ O ₃ , Fe ₃ O ₄ , Mn ₃ O ₄ , CoO, Co ₃ O ₄ , NiO, MgAl ₂ O ₄ , CoFe ₂ O ₄ , NiFe _It is made of at least one of ₂ O ₄ , CoMn ₂ O ₄ .

The tridentate organic binder is composed of at least one of hydrophobic, hydrophilic, and silicon-based organic binders.

The nanoparticles consist of quantum dots or quantum rods.

In addition, the display device according to an embodiment of the present invention includes a nanoparticle comprising a core, a shell surrounding the core, and a tridentate ligand bonded to the shell.

The nanoparticles of the present invention and a method of manufacturing the same by bonding the tridentate organic binder to the surface of the quantum dot with high density, to protect the nanoparticles from oxygen, and to secure the dispersing capacity of the tridentate organic binder, stability, color reproduction rate, luminous efficiency There is an advantage that can be improved. Accordingly, various applications such as a liquid crystal display light source, an LED light, and a quantum dot display using nanoparticles are possible.

1 is a schematic diagram showing that large particles are oxidized.
Figure 2 is a schematic diagram showing that the nanoparticles are oxidized.
3 and 4 are views showing nanoparticles according to an embodiment of the present invention.
5 is a graph showing an NMR of substance 5 prepared according to the synthesis example of the present invention.
6 is a graph showing an NMR of the material 7 prepared according to the synthesis example of the present invention.
7 is a view showing a method of manufacturing a quantum dot according to Preparation Example 1 of the present invention.
8 is a view showing a method of manufacturing a quantum dot according to Preparation Example 2 of the present invention.
9 is a graph showing the results of measuring the reliability of the quantum dots produced in accordance with Comparative Examples and Examples of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 are views showing nanoparticles according to an embodiment of the present invention. The nanoparticles of the present invention include quantum dots or quantum rods that can be used in display devices or as light emitting devices. First, quantum dots will be described as an example.

Referring to FIG. 3, the quantum dot 100 may include a core 110 made of a material having a band gap and a shell formed of a material having a large band gap surrounding the core 110. 120, and an organic binder 130 attached to the shell 120. The quantum dot 100 has a spherical shape having a diameter of about 1 to 10 nm.

The fluorescence emitted from the quantum dot 100 is light generated when electrons in an excited state fall from the conduction band to the valence band. Even if the quantum dot 110 is composed of a core of the same material, the fluorescence wavelength varies depending on the size of the particles, and as the particle size decreases, the quantum dot 110 emits a short wavelength of fluorescence and adjusts the size to generate most visible light region fluorescence of a desired wavelength. Can be. In addition, unlike general organic fluorescent compounds, since the fluorescence can be obtained by arbitrarily selecting an excitation wavelength, when quantum dots coexist, fluorescence of various colors can be observed at once.

The core 110 is formed of nanocrystals of semiconductor properties composed of group II-VI or group III-V on the periodic table, and has a specific bandgap to absorb light due to its composition and size. It will emit in the wavelength of. For example, the core may be a compound such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb, or the like. 4 compounds are used.

The shell 120 serves as a passivation layer for maintaining chemical characteristics by preventing chemical modification of the core 110 and a charging layer for imparting electrophoresis characteristics to quantum dots. Plays a role. The shell 120 has SiO ₂ , Al ₂ O ₃ , TiO ₂ , ZnO, MnO, Mn ₂ O ₃ , CuO, FeO, Fe ₂ O ₃ , Fe ₃ O ₄ , A metal compound containing any one or two or more oxygens of Mn 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 Semiconductor compounds such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaAs, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb for controlling and improving optical properties use.

In addition, the shell 120 may be formed of a single layer or multiple layers as described above, and in order to minimize the lattice mismatch effect due to the composition of other components between the core and the protective layer, the components of the core and the protective layer may be gradually formed. Configure to form in concentration. In addition, the shell 120 is made of a thickness of 10 to 100nm to protect the core 110 and to optimize the scattering of light.

The organic binder 130 is an organic layer that prevents agglomeration between the quantum dots 100 and provides a charging property, and is combined with the shell 120. The organic binder 130 is hydrophobic, hydrophilic, or silicon-based. ) At least one of organic binders.

In particular, the present invention binds to the shell 120 using a tridentate ligand of the organic binder 130. Currently, organic ligands used in quantum dots mainly use monodentate organic binders. Among them, trioctyl phosphine (TOP) or trioctyl phosphine oxide (TOPO) are bulky alkyl chains. ), There are many parts that do not have organic binder attached to the quantum dots. Even in the case of oleic acid or hexadecyl amine, which are monodentate organic binders used in place of the TOP and TOPO organic binders, the close alignment is difficult due to the repulsive force between adjacent organic binders. Assuming that the organic binder is arranged as closely as possible on the quantum dots, the bonding force between the two is determined by the bond strength between the metal of the quantum dots and the functional group elements of the organic binder.

The tridentate organic binder used in the present invention compensates for these two weaknesses and prevents the oxidation of quantum dots. The reason for the oxidization of quantum dots is that the structure of the organic protective film is formed by increasing the density of the triple bond organic binder surrounding the quantum dots to the maximum, and the second triple bond organic binder can be obtained when the organic binder has the maximum density. It has the maximum coupling position. This provides additional binding strength provided by the molecular sieve in addition to the binding strength of a single binding site. When the two effects are combined, the present invention can be referred to as forming a dense organic thin film firmly attached to quantum dots.

Tridentate organic binder that can implement the above advantages should have the following conditions. First, organic binders should have minimal repulsion between organic binders, and second, organic binders should have little reactivity other than quantum dots. Third, the end of the organic binder should be able to be applied to various organic binders, such as fat-soluble organic binder, water-soluble organic binder, silicon-based organic binder depending on the solvent for the solution process.

Accordingly, the present invention provides a tridentate organic binder represented by the following Chemical Formula 1 satisfying these conditions.

[Formula 1]

,

또는

중 선택된 어느 하나로 이루어지고 이때, n은 1 내지 3이다. 또한, Y는 CH₂, O 또는 N 중 선택된 어느 하나로 이루어지고, X는 PH₂, SH 또는 NH₂ 중 선택된 어느 하나로 이루어진다.Where R is

,

or

And any one selected from among n is 1 to 3. In addition, Y is made of any one selected from CH ₂ , O or N, X is made of any one selected from PH ₂ , SH or NH ₂ .

The R (alkyl chain) is for imparting dispersibility of the nanoparticles, and in other words, serves to enable solution. Y serves as an intermediate functional group to combine R and R having three binding forces. X serves as a functional group that binds to the shell 120.

The tridentate organic binder represented by Chemical Formula 1 may be, for example, an organic binder represented by Chemical Formulas 2 and 3 below.

[Formula 2]

[Formula 3]

The tridentate organic binder of the present invention described above is composed of any one selected from the group consisting of PH ₂ , SH, or NH ₂ at the terminal binding to the shell, thereby providing an additional bond strength provided by the molecular sieve in addition to the bond strength of the single bond site. do.

Meanwhile, referring to FIG. 4, the nanoparticles of the present invention may be quantum rods shown in FIG. 4 in addition to the quantum dots of FIG. 3. The quantum rods are composed of the core 110, the shell 120 surrounding the core 110, and the tridentate organic binder 130, similarly to the quantum dots described above. Quantum rods have the same configuration and properties as quantum dots in addition to rods, but their shapes and structures are different.

Hereinafter, the synthesis examples and nanoparticles of the tridentate organic binder of the present invention will be described in detail in the following synthesis examples and examples. However, the following examples are merely to illustrate the present invention is not limited to the following examples.

Synthesis Example of Tridentate Organic Binder

Potassium hydroxide (KOH, 12.63 g, 225.2 mmol) and n-decyl bromide (9.56 g, 6.65 mL, 55.6 mmol) were added to the reaction apparatus with dimethyl sulfoxide (DMSO) (50 mL). After stirring, solid HOCH ₂ C (CH ₂ O) ₃ CCH ₃ (7.67 g, 47.9 mmol) was added thereto, and stirred for 45 minutes at room temperature to react. Then, add 100 mL of distilled water, extract with 350 mL of diethyl ether, separate the organic solution layer, and dry to prepare substance 1.

Hydrochloric acid (HCl) aqueous solution (23.8 mmol, 2 mol / L, 12 mL) was dissolved in 40 mL of methanol (methanol), and then added to the material 1 (14.7 mmol) and stirred for 6 hours. Sodium carbonate (Na ₂ CO ₃ , 1.80 g, 17.0 mmol) was injected and stirred for an additional 3 hours at room temperature, and then the solvent was removed. Then, methylene chloride was added and filtered through Celite. Methylene chloride (methylene chloride) of the final material is dried and separated by column chromatography (column chromatography) to prepare a material 2.

The substance 2 (59.52 mmol) was dissolved in pyridine (60 mL), and then p-toluenesulfonyl chloride (238.1 mmol) was injected in a bath at -5 ° C and at 0 ° C. After stirring for 2 hours, the mixture is stirred at room temperature for 24 hours. The precipitate of the mixture is filtered off and washed with cold diethyl ether to dry the product to prepare material 3.

The substance 3 (2.93 mmol) and potassium thiocyanate (KSCN) (3.70 g, 38.1 mmol) were dissolved in dry dimethylformamide (15 mL) and stirred at 140 ° C. for 6 hours. do. Distilled water was added to the mixture and stored at 5 ° C. for 12 hours, and the precipitate formed was washed with distilled water, and then poured into methylene chloride (320 mL) to remove impurities, followed by drying to prepare substance 4.

Substance 4 (6.01 mmol) in diethyl ether / Tetrahydrofurane (THF) (1: 1, 10 mL) was dissolved in diethyl ether (15 mL) lithium aluminum hydride (LiAlH ₄ ) (0.46 g, 12.0 mmol) was added to the mixture under nitrogen stream. The mixture was stirred for 3 hours and then extracted with diethyl ether in saturated aqueous ammonium chloride (NH ₄ Cl) solution. The final mixture thus obtained is obtained by separating off substance 5 via column chromatography.

To the material 3 (2.93 mmol) was added sodium azide (9.376 mmol) and 50 mL of dimethylformamide and stirred for 24 hours. Material 6 is prepared by extraction, followed by drying with dietel ether and distilled water.

Palladium activated carbon was added to 30 mL of tetrahydrofuran synthesized in the above, and hydrogen was injected and stirred at 1 atm for 24 hours. Purification of the mixture separates material 7 through distillation.

Thus, finally, a tridentate organic binder in which SH is present at the end as in substance 5 and a tridentate organic binder in which NH 2 is present at the terminal as in substance 7 are prepared. 5 is a graph showing the NMR of the substance 5, Figure 6 is a graph showing the NMR of the substance 7. As shown in the NMR graphs of Figures 5 and 6, it can be confirmed that the synthesis of the material 5 and the material 7 through the above-described synthesis method.

Hereinafter, a preparation example of manufacturing nanoparticles using the tridentate organic binders prepared above will be disclosed. In the following, preparation of nanoparticles is disclosed by the preparation examples of two methods, and examples of the nanoparticles are disclosed as preparation examples.

7 is a view showing a method of manufacturing a quantum dot according to Preparation Example 1 of the present invention, Figure 8 is a view showing a method of manufacturing a quantum dot according to Preparation Example 2 of the present invention. Preparation Example 1 below describes a method of substituting a monodentate organic binder (ligand) on the surface of a conventionally synthesized quantum dot with a tridentate organic binder of the present application. In addition, Preparation Example 2 below shows a method of introducing the organic binder directly onto the surface by inserting the tridentate organic binder of the present application during quantum dot synthesis. Preparation Example 1 is a method of introducing the organic binder through substitution in the case of using a single-digit organic binder for the synthetic conditions of the various quantum dots, Preparation Example 2 in the case of introducing a three-digit organic binder in the synthetic conditions It is a method of introducing a tridentate organic binder by direct injection.

Preparation Example 1

Referring to FIG. 7, 10 mL of a tridentate ligand (100 mM) in Chloroform (130) 130 in bare QD, in which single-site organic binder 125 is bonded to core 110 and shell 120. Inject and stir at room temperature for 24 hours. Then, methanol is injected to form a precipitate in quantum dots combined with the tridentate organic binder, and then redispersed in toluene. As a result, the monodentate organic binder bonded to the bare quantum dot is replaced with the tridentate organic binder.

Preparation Example 2

1) Zn stock Soln. Produce

5 mmol of zinc oxide (ZnO), 14.1 mL of oleic acid, and 35.9 mL of 1-octadecene were injected into the reaction vessel, and water and oxygen were removed for 1 hour under vacuum at 120 ° C. After removal, the mixture is stirred at 280 ° C under a stream of nitrogen.

2) S stock Soln. Produce

Sulfur 5 mmol, 50 mL of ODE was removed for 1 h under vacuum at 120 ° C. and then stirred at 180 ° C. under a stream of nitrogen.

And 5 mL of ODE, 1.5 mL of Core QD Hexane Soln. (~ 1 × 10-4 mmol) and 2 g of tridentate organic binder are placed in a reaction vessel and stirred at 200 ° C. under nitrogen stream after removing water and solvent at 100 ° C. Prepared Zn stock Soln. After rapid injection of 93 μL into the reaction flask, the solution was stirred for 15 minutes and then S stock Soln. Was stirred for 15 minutes after 93 μL dropwise to form 1 monolayer of ZnS shell (2 mL = Zn, S stock Soln, 0.17 mL, respectively). 3ML = 0.22 mL, 4ML = 0.29 mL in order) The synthesized CdSe @ ZnS is extracted with hexane (Hexane) and methanol (MeOH) and purified by precipitation using acetone (Acetone). Purified quantum dots are stored dispersed in toluene.

Hereinafter, the quantum dots prepared according to Preparation Example 1 prepared above as an example, and the conventional quantum dot having a single-digit organic binder as a comparative example, the reliability measurement results of the quantum dots produced according to the comparative examples and examples 9 is shown.

The reliability measurement was measured under an atmosphere of 85 ° C. and 85% humidity. The quantum dot of the above example was formed by substituting the tridentate organic binder represented by the material 5 above.

Referring to FIG. 9, the quantum dot according to the comparative example gradually decreased as the day passed, and on day 6, the quantum dot decreased about 49% of the original fluorescence intensity. On the other hand, the quantum dot according to the embodiment was reduced by about 21% compared to the initial fluorescence intensity on the 6th day while the decrease in fluorescence intensity stopped and maintained on the second day. Therefore, it can be seen that the result of measuring the reliability of the quantum dot according to the embodiment of the present invention is superior to the comparative example.

The nanoparticles of the present invention and a method of manufacturing the same by bonding the tridentate organic binder to the surface of the quantum dot with high density, to protect the nanoparticles from oxygen, and to secure the dispersing capacity of the tridentate organic binder, stability, color reproduction rate, luminous efficiency There is an advantage that can be improved. Accordingly, various applications such as a liquid crystal display light source, an LED light, and a quantum dot display using nanoparticles are possible.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the above-described technical configuration of the present invention may be embodied in other specific forms by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features. It will be appreciated that it may be practiced. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all aspects. In addition, the scope of the present invention is shown by the claims below, rather than the above detailed description. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.

100: nanoparticle 110: core
120: shell 130: tridentate organic binder

Claims (14)

core;
A shell surrounding the core; And
It includes a tridentate ligand bonded to the shell,
The tridentate organic binder is a nanoparticle represented by the following formula (1).
[Formula 1]

Where R is

,

or

And any one selected from among n is 1 to 3. In addition, Y is made of any one selected from CH ₂ , O or N, X is made of any one selected from PH ₂ , SH or NH ₂ .
delete According to claim 1,
The core is a nanoparticle consisting of any one or more of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb.
According to claim 1,
The shell is SiO ₂ , Al ₂ O ₃ , TiO ₂ , ZnO, MnO, Mn ₂ O ₃ , CuO, FeO, Fe ₂ O ₃ , Fe ₃ O ₄ , Mn ₃ O ₄ , CoO, Co ₃ O ₄ , NiO , Nanoparticles consisting of one or more of MgAl ₂ O ₄ , CoFe ₂ O ₄ , NiFe ₂ O ₄ , CoMn ₂ O ₄ .
According to claim 1,
The tridentate organic binder is a nanoparticle consisting of any one or more of a hydrophobic, hydrophilic, and silicon-based organic binder.
According to claim 1,
The nanoparticles are made of quantum dots (quantum dot) or quantum rods (quantum rods) nanoparticles.
In the method for producing a nanoparticle comprising a core, a shell and an organic binder,
The organic binder is prepared by substituting a single bond organic bond bonded to a shell with a triple bond organic bond,
The tridentate organic binder is a method for producing nanoparticles represented by the following formula (1).
[Formula 1]

Where R is

,

or

And any one selected from among n is 1 to 3. In addition, Y is made of any one selected from CH ₂ , O or N, X is made of any one selected from PH ₂ , SH or NH ₂ .
In the method for producing a nanoparticle comprising a core, a shell and a tridentate organic binder,
Direct synthesis by introducing the tridentate organic binder during synthesis of the core and the shell,
The tridentate organic binder is a method for producing nanoparticles represented by the following formula (1).
[Formula 1]

Where R is

,

or

And any one selected from among n is 1 to 3. In addition, Y is made of any one selected from CH ₂ , O or N, X is made of any one selected from PH ₂ , SH or NH ₂ .
delete The method according to any one of claims 7 to 8,
The core is a method for producing nanoparticles consisting of any one or more of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP, AlSb.
The method according to any one of claims 7 to 8,
The shell is SiO ₂ , Al ₂ O ₃ , TiO ₂ , ZnO, MnO, Mn ₂ O ₃ , CuO, FeO, Fe ₂ O ₃ , Fe ₃ O ₄ , Mn 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 A} method for producing a nanoparticle consisting of at least one.
The method according to any one of claims 7 to 8,
The tridentate organic binder is a method for producing nanoparticles consisting of any one or more of a hydrophobic, hydrophilic, and silicon-based organic binder.
The method according to any one of claims 7 to 8,
The nanoparticle is a method for producing a nanoparticle consisting of quantum dots (quantum dot) or quantum rods (quantum rods).
A nanoparticle comprising a core, a shell surrounding the core, and a tridentate ligand bonded to the shell,
The tridentate organic binder is represented by Formula 1 below.
[Formula 1]

Where R is

,

or

And any one selected from among n is 1 to 3. In addition, Y is made of any one selected from CH ₂ , O or N, X is made of any one selected from PH ₂ , SH or NH ₂ .

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