CN108893103A - The method of coated quantum dots and its product of preparation - Google Patents
The method of coated quantum dots and its product of preparation Download PDFInfo
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- C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
- C09K11/881—Chalcogenides
- C09K11/883—Chalcogenides with zinc or cadmium
Abstract
The present invention relates to a kind of method of coated quantum dots and its products of preparation.Method of the invention is that the quantum dot solution of predetermined amount is added drop-wise in the inorganic salt solution for being used for coated quantum dots, and the quantum dot of coated inorganic salt is obtained after reaction.Quantum dot solution includes oil-soluble quantum dot and nonpolar solvent, and inorganic salt solution is inorganic salts-polar organic solvent or inorganic salts-polar organic solvent-water stabilising system.The quantum dot stability for the coated inorganic salt that this method obtains is high, has good photoluminescence performance.
Description
Technical field
The application belongs to field of nanometer material technology, and in particular to a kind of method of coated quantum dots and its product of preparation.
Background technique
Due to the quantum effect of itself, quantum dot has shown many excellent properties for being different from macroscopic body material, such as
Exciting light spectrum width and continuously distributed, emission spectrum is narrow and symmetrical, Color tunable, and photochemical stability is high, and fluorescence lifetime is long etc., makes
Its nonlinear optics, magnetic medium, catalysis, medicine and in terms of have extremely wide application prospect.
Adverse effect of the quantum dot vulnerable to external environment, so that application of the quantum dot in luminescence generated by light field is limited
System.By coating metal, metal oxide, inorganic matter etc. in quantum dot surface, the stability of quantum dot can be improved.Generally,
To water-soluble quantum dot coated inorganic salt directly in aqueous phase solution, the quantum dot of inorganic salts cladding is obtained.But water-soluble amount
Son point is typically all to be obtained by oil-soluble quantum dot phase inversion, compared with oil-soluble quantum dot, fluorescence quantum efficiency and stabilization
Property is lower.However, it is current directly still more difficult for oil-soluble quantum dot coated inorganic salt, need a kind of new solution.
Summary of the invention
In view of the above technical problems, the application provides a kind of method of coated quantum dots.
In order to achieve the above-mentioned object of the invention, according to a first aspect of the present application, a kind of method of coated quantum dots is provided,
Including step：The quantum dot solution of predetermined amount is added drop-wise in the inorganic salt solution for being used for coated quantum dots, is wrapped after reaction
Cover the quantum dot of inorganic salts.
Further, above-mentioned quantum dot solution includes oil-soluble quantum dot and nonpolar solvent.Further, above-mentioned quantum
Point is oil-soluble quantum dot.Water-soluble quantum dot coordination ability is weak, and ligand range of choice is very narrow.In contrast, oil-soluble quantum
The crystallinity of point is relatively good, and ligand range of choice is wide, and the ligands such as amine, acid, mercaptan, alkyl phosphonic acid of long-chain can select, and
And the luminous efficiency of oil-soluble quantum dot is high, narrow size distribution, film forming is preferable.The oil-soluble quantum dot includes II-VIA race
At least one of compound, IV-VIA compounds of group, III-VA compounds of group, I-VIA compounds of group.The structure packet of quantum dot
Include with one of mononuclear structure, core-single layer shell structure and core-multilayer shell structure, including CdS, CdSe, CdSeS,
CdZnSeS、CdS/ZnS、CdSe/ZnS、CdSe/CdS/ZnS、CdTe/CdS/ZnS、CdSeS/CdS/ZnS、CdZnSeS/
ZnSe/ZnS, InP, InP/ZnS or ZnSe/ZnS.The composition form of quantum dot is unrestricted, can be doped or non-doped
Quantum dot.
Further, above-mentioned nonpolar solvent can dissolve the quantum dot, and not miscible with water.For example, toluene, positive heptan
Alkane, n-hexane, chloroform, methylene chloride, hexamethylene, trichloro ethylene etc..
Further, inorganic salt solution described in above-mentioned preparation method includes inorganic salts and polar organic solvent.The present invention
In, the inorganic salt solution for coated quantum dots is inorganic salts-polar organic solvent stabilising system, which can be molten with quantum dot
Liquid phase interaction, when inorganic salts-polar organic solvent stabilising system is added in quantum dot solution, solution polarity becomes
Change, the solubility of inorganic salts in the solution changes therewith, and then is slowly precipitated and is coated on quantum dot surface.
Further, above-mentioned inorganic salt solution further includes water.Solubility of the part inorganic salts in polar organic solvent is too
Small, when mixing with quantum dot solution, covered effect is poor.The addition of water can promote the dissolution of inorganic salts in the solution, in turn
Can effective coated quantum dots, improve the stability of quantum dot.Preferably, the inorganic salts are the inorganic salts containing the crystallization water,
For example, sodium bisulfate monobydrate, sodium phosphate dodecahydrate, dipotassium hydrogen phosphate trihydrate, Zinc vitriol, six chloride hydrates
Magnesium, Disodium sulfate decahydrate, bitter salt, washing soda, barium chloride dihydrate, calcium sulphate dihydrate, six hydrated sulfuric acids
Nickel, rare earth element water-containing crystal salt etc..
Further, the cation of above-mentioned inorganic salts includes sodium ion, potassium ion, magnesium ion, calcium ion, zinc ion, barium
At least one of ion, aluminium ion, titanium ion, cobalt ions, nickel ion, chromium ion, manganese ion and rare earth ion, it is above-mentioned
Metal ion does not react with polar solvent and quantum dot.
Further, the anion of above-mentioned inorganic salts includes oxygen-containing acid ion, chloranion, bromate ion, iodine
At least one of acid ion, fluorine ion, chloride ion, bromide ion and iodide ion.Wherein, oxygen-containing acid ion is selected from nitrate anion
Ion, sulfate ion, carbanion, phosphate anion, silicate ion and borate ion.
Further, the volume ratio that feeds intake of above-mentioned quantum dot solution and inorganic salt solution is 1:(1~100).
Further, the preparation method of the above-mentioned inorganic salt solution for coated quantum dots includes the following steps：S1, by nothing
Machine salt is dissolved in polar organic solvent, forms inorganic salt solution；Above-mentioned inorganic salt solution is centrifuged, takes supernatant liquor, obtains by S2
To inorganic salts-polar organic solvent stabilising system of saturation, that is, it is used for the inorganic salt solution of coated quantum dots.Above-mentioned inorganic salts can
To be free from the inorganic salts of the crystallization water, the cation of inorganic salts include sodium ion, potassium ion, magnesium ion, calcium ion, zinc ion,
One of aluminium ion, titanium ion, cobalt ions, nickel ion, chromium ion, manganese ion and rare earth ion；Anion includes containing
One of nitrate ion, sulfate ion, fluorine ion, chloride ion, bromide ion and iodide ion.For example, sodium nitrate, nitric acid
Potassium, magnesium nitrate, sodium sulphate, magnesium sulfate, potassium sulfate, sodium chloride, sodium bromide, magnesium chloride, potassium chloride etc..Above-mentioned inorganic salts can also be with
It is the inorganic salts containing the crystallization water, for example, sodium bisulfate monobydrate, sodium phosphate dodecahydrate, dipotassium hydrogen phosphate trihydrate, seven water
Close zinc sulfate, Magnesium dichloride hexahydrate, Disodium sulfate decahydrate, bitter salt, washing soda, barium chloride dihydrate, two water
Close calcium sulfate, six hydration nickel sulfate etc..Above-mentioned polar organic solvent includes methanol, ethyl alcohol, isopropanol, acetonitrile, dimethyl sulfoxide, two
One of methylformamide, acetone, glycerol, pyridine, preferably methanol.
Further, the mass ratio that feeds intake of above-mentioned inorganic salts and polar organic solvent is 1:(1~100), wherein containing knot
The inorganic salts of brilliant water and the mass ratio that feeds intake of polar organic solvent are 1:(10~100).
Further, the preparation method of above-mentioned inorganic salt solution includes the following steps：Inorganic salts are dissolved in the water by S1,
Form the aqueous solution of inorganic salts；The aqueous solution of above-mentioned inorganic salts is added drop-wise in polar organic solvent by S2, and centrifuging and taking upper layer is clear
Liquid, the inorganic salts-water-polar organic solvent stabilising system being saturated are used for the inorganic salt solution of coated quantum dots.It is above-mentioned
Inorganic salts can be the inorganic salts without the crystallization water, the cation of inorganic salts include sodium ion, potassium ion, magnesium ion, calcium ion,
One of zinc ion, aluminium ion, titanium ion, cobalt ions, nickel ion, chromium ion, manganese ion and rare earth ion；Anion
Including nitrate ion, sulfate ion, chloranion, bromate ion, iodate ion, fluorine ion, chloride ion, bromine from
One of son and iodide ion.For example, sodium nitrate, potassium nitrate, magnesium nitrate, sodium sulphate, magnesium sulfate, potassium sulfate, sodium chlorate, chloric acid
Magnesium, potassium chlorate, sodium bromate, magnesium bromate, potassium bromate, sodium iodide, potassium iodide, magnesium iodide, sodium chloride, magnesium chloride, potassium chloride, bromination
Sodium, magnesium bromide, potassium bromide, sodium bromide, magnesium bromide, potassium iodide etc..Above-mentioned inorganic salts are also possible to the inorganic salts containing the crystallization water,
For example, sodium bisulfate monobydrate, sodium phosphate dodecahydrate, dipotassium hydrogen phosphate trihydrate, Zinc vitriol, six chloride hydrates
Magnesium, Disodium sulfate decahydrate, bitter salt, washing soda, barium chloride dihydrate, calcium sulphate dihydrate, six hydrated sulfuric acids
Nickel etc..Above-mentioned polar organic solvent includes methanol, ethyl alcohol, isopropanol, acetonitrile, dimethyl sulfoxide, dimethylformamide, acetone, sweet
One of oil, pyridine, preferably methanol.
Further, the mass ratio that feeds intake of above-mentioned inorganic salts and water is 1:(1~10), aqueous solution and pole containing inorganic salts
Property organic solvent feed intake volume ratio be 1:(100~200).
According to the another aspect of the application, a kind of quantum dot compound is provided, according to the side of above-mentioned coated quantum dots
Method is prepared.
Further, above-mentioned quantum dot compound includes quantum dot and inorganic salts, and inorganic salts are coated on the surface of quantum dot.
In above-mentioned quantum dot compound quantum dot be above-mentioned oil-soluble quantum dot, including II-VIA compounds of group, IV-VIA compounds of group,
At least one of III-VA compounds of group, I-VIA compounds of group.The cation of inorganic salts includes in above-mentioned quantum dot compound
Sodium ion, potassium ion, magnesium ion, calcium ion, zinc ion, barium ions, aluminium ion, titanium ion, cobalt ions, nickel ion, chromium ion,
One of manganese ion and rare earth ion.The anion of inorganic salts include nitrate ion, sulfate ion, carbonate from
Son, phosphate anion, silicate ion, borate ion, chloranion, bromate ion, iodate ion, fluorine ion,
One of chloride ion, bromide ion and iodide ion.
The application is wrapped after reaction by the way that quantum dot solution to be added drop-wise in the inorganic salt solution for being used for coated quantum dots
Cover the quantum dot of inorganic salts.Quantum dot solution includes oil-soluble quantum dot and nonpolar solvent, and inorganic salt solution is inorganic salts-pole
Property organic solvent or inorganic salts-polar organic solvent-water stabilising system, when two kinds of solution mix, the dissolution of inorganic salts
Degree changes, and is precipitated in quantum dot surface, forms precipitating, finally obtain quantum dot compound, i.e. surface is coated with inorganic salts
Oil-soluble quantum dot.The quantum dot stability for the coated inorganic salt that this method obtains is high, has good photoluminescence performance.
This method preparation process is simple, easy to operate, high-efficient.
Detailed description of the invention
Fig. 1 is the TEM figure for the CdSe/ZnS quantum dot that surface coats sodium chloride in the embodiment of the present application 1.
Specific embodiment
Below in conjunction with the application embodiment, technical solutions in the embodiments of the present application is described in detail.It answers
It is noted that described embodiment is only a part of embodiment of the application, rather than whole embodiments.
Embodiment 1
Coat the preparation of the CdSe/ZnS quantum dot of sodium chloride
The preparation of sodium chloride solution for coated quantum dots：1) 0.05g sodium chloride is dissolved in 8mL methanol, is obtained
Sodium chloride solution；2) above-mentioned sodium chloride solution is centrifuged, takes supernatant liquor, the sodium chloride being saturated-methanol stabilising system, i.e.,
Sodium chloride solution for cladding.
Sodium chloride is coated in CdSe/ZnS quantum dot surface：Take the toluene of the CdSe/ZnS quantum dot of 2mL 0.01mol/L
Solution is slowly added into sodium chloride-methanol stabilising system of the above-mentioned saturation of 8mL, sufficiently reacts and stir, obtain surface
Coat the CdSe/ZnS quantum dot of sodium chloride, i.e. sample 1.
The SEM photograph of sample 1 is as shown in Figure 1.In Fig. 1, light part 11 is coating, dark 12 amount of being of part
Sub- point.As can be seen from Figure 1, quantum dot is not reunited, good dispersion.Use CL-200FZ light source photoelectric properties integrated test system
The luminous intensity that goes out of sample 1 is tested.Test condition is：The operating current of test macro is 20mA, and excitation wavelength is
460nm.Go out light intensity value compared with the light intensity value out of initial time (that is, when 0h) for what each predetermined instant obtained, obtains
The results are shown in Table 1.
Embodiment 2
Coat the preparation of the InP quantum dot of magnesium chloride
The preparation of magnesium chloride solution for coated quantum dots：1) 0.3g magnesium chloride is dissolved in 10mL dimethylformamide
In, obtain magnesium chloride solution；2) above-mentioned magnesium chloride solution is centrifuged, takes supernatant liquor, the magnesium chloride-dimethyl methyl being saturated
Amide stabilising system, the i.e. magnesium chloride solution for cladding.
Magnesium chloride is coated in InP quantum dot surface：The chloroformic solution for taking the InP quantum dot of 2mL 0.02mol/L, is delayed
Slowly it is added in magnesium chloride-dimethylformamide stabilising system of the above-mentioned saturation of 10mL, sufficiently reacts and stir, obtain surface packet
Cover the InP quantum dot of magnesium chloride, i.e. sample 2.
The luminous intensity that goes out of sample 2 is tested, the results are shown in Table 1.Test mode and condition and 1 phase of embodiment
Together.
Embodiment 3
Coat the preparation of the CdSeS/CdS/ZnS quantum dot of potassium chloride
The preparation of Klorvess Liquid for coated quantum dots：1) 0.2g potassium chloride is dissolved in 0.6mL water, forms chlorine
Change aqueous solutions of potassium；2) above-mentioned potassium chloride solution is added drop-wise in 9mL isopropanol, centrifuging and taking supernatant liquor, the chlorine being saturated
Change potassium-isopropanol-water stabilising system, the i.e. Klorvess Liquid for cladding.
Potassium chloride is coated in CdSeS/CdS/ZnS quantum dot surface：Take the CdSeS/CdS/ZnS amount of 3mL 0.009mol/L
The n-heptane solution of son point, is slowly added into potassium chloride-isopropanol-water stabilising system of the above-mentioned saturation of 9mL, sufficiently anti-
It should and stir, obtain the CdSeS/CdS/ZnS quantum dot of surface cladding potassium chloride, i.e. sample 3.
The luminous intensity that goes out of sample 3 is tested, the results are shown in Table 1.Test mode and condition and 1 phase of embodiment
Together.
Embodiment 4
Coat the preparation of the CdSe quantum dot of sodium sulphate
The preparation of metabisulfite solution for coated quantum dots：1) 0.078g sodium sulphate is dissolved in 0.4mL water, is formed
Saturated aqueous sodium sulfate；2) above-mentioned saturated aqueous sodium sulfate is added drop-wise in 10mL methanol, centrifuging and taking supernatant liquor obtains
It is saturated sodium sulphate-methanol-water stabilising system, the i.e. metabisulfite solution for cladding.
Sodium sulphate is coated on CdSe quantum dot surface：The toluene solution of the CdSe quantum dot of 1mL 0.003mol/L is taken, it will
It is slowly added into the above-mentioned saturation sodium sulphate-methanol-water stabilising system of 10mL, sufficiently reacts and stirs, and obtains surface cladding
The CdSe quantum dot of sodium sulphate, i.e. sample 4.
The luminous intensity that goes out of sample 4 is tested, the results are shown in Table 1.Test mode and condition and 1 phase of embodiment
Together.
Embodiment 5
Coat the preparation of the InP/ZnS quantum dot of potassium nitrate
The preparation of potassium nitrate solution for coated quantum dots：1) 0.158g potassium nitrate is dissolved in 0.5mL water, is formed
Potassium nitrate aqueous solution；2) potassium nitrate aqueous solution is added drop-wise in 8mL ethyl alcohol, centrifuging and taking supernatant liquor, the nitre being saturated
Sour potassium-alcohol-water stabilising system, the i.e. potassium nitrate solution for cladding.
Potassium nitrate is coated in InP/ZnS quantum dot surface：The normal heptane of the InP/ZnS quantum dot of 2mL 0.006mol/L is molten
Liquid is slowly added into potassium nitrate-alcohol-water stabilising system of the above-mentioned saturation of 8mL, sufficiently reacts and stir, obtain table
Bread covers the InP/ZnS quantum dot of potassium nitrate, i.e. sample 5.
The luminous intensity that goes out of sample 5 is tested, the results are shown in Table 1.Test mode and condition and 1 phase of embodiment
Together.
Embodiment 6
Coat the preparation of the CdTe/CdS/ZnS quantum dot of magnesium sulfate
The preparation of Adlerika for coated quantum dots：1) 0.2g magnesium sulfate is dissolved in 0.6mL water, is formed full
And magnesium sulfate solution；2) the saturation magnesium sulfate solution is added drop-wise in 9mL isopropanol, centrifuging and taking supernatant liquor obtains
The magnesium sulfate of saturation-isopropanol-water stabilising system, the i.e. Adlerika for cladding.
Magnesium sulfate is coated in CdTe/CdS/ZnS quantum dot surface：Take the ZnSe/ZnS quantum dot of 1mL 0.004mol/L
Chloroformic solution is slowly added into magnesium sulfate-isopropanol-water stabilising system of the above-mentioned saturation of 9mL, sufficiently reacts and stir
It mixes, obtains the CdTe/CdS/ZnS quantum dot of surface cladding magnesium sulfate, i.e. sample 6.
The luminous intensity that goes out of sample 6 is tested, the results are shown in Table 1.Test mode and condition and 1 phase of embodiment
Together.
Embodiment 7
Coat the preparation of the CdSe quantum dot of sodium sulphate
The preparation of metabisulfite solution for coated quantum dots：1) 1g Disodium sulfate decahydrate is dissolved in 10mL methanol,
Obtain metabisulfite solution；2) above-mentioned metabisulfite solution is centrifuged, takes supernatant liquor, the sodium sulphate being saturated-methanol liptinite
System, the i.e. metabisulfite solution for cladding.
Sodium sulphate is coated on CdSe quantum dot surface：The toluene solution for taking the CdSe quantum dot of 5mL 0.05mol/L, by it
It is slowly added into sodium sulphate-methanol stabilising system of the above-mentioned saturation of 10mL, sufficiently reacts and stir, obtain surface cladding sulfuric acid
The CdSe quantum dot of sodium, i.e. sample 7.
The luminous intensity that goes out of sample 7 is tested, the results are shown in Table 1.Test mode and condition and 1 phase of embodiment
Together.
Embodiment 8
Coat the preparation of the InP/ZnS quantum dot of magnesium sulfate
The preparation of Adlerika for coated quantum dots：1) 0.5g bitter salt is dissolved in 5mL isopropanol
In, obtain Adlerika；2) above-mentioned Adlerika is centrifuged, takes supernatant liquor, the magnesium sulfate-isopropanol being saturated is steady
Determine system, the i.e. Adlerika for cladding.
Magnesium sulfate is coated in InP/ZnS quantum dot surface：Take the normal heptane of the InP/ZnS quantum dot of 1mL 0.01mol/L
Solution is slowly added into magnesium sulfate-isopropanol stabilising system of the above-mentioned saturation of 5mL, sufficiently reacts and stir, obtain table
Bread covers the InP/ZnS quantum dot of magnesium sulfate, i.e. sample 8.
The luminous intensity that goes out of sample 8 is tested, the results are shown in Table 1.Test mode and condition and 1 phase of embodiment
Together.
Embodiment 9
Coat the preparation of the CdZnSeS/ZnSe/ZnS quantum dot of sodium carbonate
The preparation of sodium carbonate liquor for coated quantum dots：1) 0.6g washing soda is mixed with water, forms carbonic acid
Sodium water solution；2) above-mentioned aqueous sodium carbonate is added in 10mL dimethylformamide, centrifuging and taking supernatant liquor is saturated
Sodium carbonate-dimethylformamide-water stabilising system, i.e., for cladding sodium carbonate liquor.
Sodium carbonate is coated in CdZnSeS/ZnSe/ZnS quantum dot surface：Take the CdZnSeS/ZnSe/ of 3mL 0.01mol/L
The chloroformic solution of ZnS quantum dot is slowly added into sodium carbonate-dimethylformamide-water liptinite of the above-mentioned saturation of 10mL
It in system, sufficiently reacts and stirs, obtain the CdZnSeS/ZnSe/ZnS quantum dot of coated with carbon acid sodium, i.e. sample 9.
The luminous intensity that goes out of sample 9 is tested, the results are shown in Table 1.Test mode and condition and 1 phase of embodiment
Together.
Comparative example 1
Using the feux rouges InP quantum dot as a comparison sample 1 of no coating, the luminous intensity that goes out of contrast sample 1 is carried out
Test, the results are shown in Table 1.Test mode and condition are same as Example 1.
Comparative example 2
Using the feux rouges CdSe/ZnS quantum dot as a comparison sample 2 of no coating, to contrast sample 2 go out luminous intensity into
Test is gone, the results are shown in Table 1.Test mode and condition are same as Example 1.
Table 1
In table 1, when the time is 0h, initially to go out luminous intensity.Typically, with the extension of testing time, extraneous ring
Border can constantly influence the stability of quantum dot, and sample goes out luminous intensity relative to initially luminous intensity can gradually change out.It can by table 1
Know：By quantum dot compound of the invention after long-time irradiation excitation, luminous intensity still about or equal to initially goes out out
Luminous intensity.For example, luminous intensity is still at least 100% out after 500 hours blue light illuminations.With in the prior art without packet
The quantum dot covered is compared, and luminous intensity is greatly improved out.This illustrates the quantum dot of the coated inorganic salt of this method preparation
Compound has a longer life expectancy and good photoluminescence performance.
Although inventor has done more detailed elaboration to the technical solution of the application and has enumerated, it should be understood that for
For those skilled in the art, above-described embodiment is modified and/or the flexible or equivalent alternative solution of use is obvious
, cannot all be detached from the essence of the application spirit, the term occurred in the application be used for elaboration to technical scheme and
Understand, the limitation to the application can not be constituted.
Claims (10)
1. a kind of method of coated quantum dots, it is characterized in that including step：
The quantum dot solution of predetermined amount is added drop-wise in the inorganic salt solution for being used for coated quantum dots, coated inorganic is obtained after reaction
The quantum dot of salt.
2. the method for coated quantum dots according to claim 1, which is characterized in that the quantum dot solution includes oil-soluble
Quantum dot and nonpolar solvent.
3. the method for coated quantum dots according to claim 1, which is characterized in that the inorganic salt solution includes inorganic salts
And polar organic solvent.
4. the method for coated quantum dots according to claim 3, which is characterized in that the inorganic salt solution also includes water；
Preferably, the inorganic salts are the inorganic salts containing the crystallization water.
5. the method for coated quantum dots according to claim 1, which is characterized in that the cation of the inorganic salts includes sodium
Ion, potassium ion, magnesium ion, calcium ion, zinc ion, barium ions, aluminium ion, titanium ion, cobalt ions, nickel ion, chromium ion, manganese
At least one of ion and rare earth ion.
6. the method for coated quantum dots according to claim 1, which is characterized in that the anion of the inorganic salts includes containing
At least one of oxygen acid ion, fluorine ion, chloride ion, bromide ion and iodide ion.
7. the method for coated quantum dots according to claim 1, which is characterized in that the quantum dot solution and inorganic salts are molten
The volume ratio of liquid is 1:(1~100).
8. the method for coated quantum dots according to claim 1, which is characterized in that the preparation method of the inorganic salt solution
Include the following steps：
Inorganic salts are dissolved in polar organic solvent by S1, form inorganic salt solution；
Above-mentioned inorganic salt solution is centrifuged, takes supernatant liquor by S2, the inorganic salts being saturated-polar organic solvent stabilising system,
It is used for the inorganic salt solution of coated quantum dots.
The mass ratio that feeds intake of the inorganic salts and polar organic solvent is 1:(1~100), wherein the inorganic salts containing the crystallization water with
The mass ratio that feeds intake of polar organic solvent is 1:(10~100).
9. the method for coated quantum dots according to claim 1, which is characterized in that the preparation method of the inorganic salt solution
Include the following steps：
Inorganic salts are dissolved in the water by S1, form the aqueous solution of inorganic salts；
The aqueous solution of above-mentioned inorganic salts is added drop-wise in polar organic solvent by S2, centrifuging and taking supernatant liquor, and what is be saturated is inorganic
Salt-water-polar organic solvent stabilising system is used for the inorganic salt solution of coated quantum dots.
The mass ratio that feeds intake of the inorganic salts and water is 1:(1~10), aqueous solution and polar organic solvent containing inorganic salts
The volume ratio that feeds intake is 1:(100~200).
10. a kind of quantum dot compound, which is characterized in that according to claim 1~9 method described in any one preparation and
At.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109679657A (en) * | 2019-01-24 | 2019-04-26 | 华东理工大学 | Ligand exchange method prepares the nanocrystalline material of sulfate radical cladding |
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| CN110643350A (en) * | 2018-12-14 | 2020-01-03 | 马鞍山微晶光电材料有限公司 | Quantum dot and microcrystal composite master batch |
| CN110699083A (en) * | 2018-12-14 | 2020-01-17 | 马鞍山微晶光电材料有限公司 | Preparation method of water-phase quantum dot microcrystal |
| CN110724393A (en) * | 2018-12-14 | 2020-01-24 | 马鞍山微晶光电材料有限公司 | Quantum dot microcrystal master batch |
| CN110734757A (en) * | 2018-12-14 | 2020-01-31 | 马鞍山微晶光电材料有限公司 | aqueous phase quantum dot stabilizers and application thereof |
| CN110760302A (en) * | 2018-12-14 | 2020-02-07 | 马鞍山微晶光电材料有限公司 | Green light quantum dot microcrystal composite master batch |
| CN109679657A (en) * | 2019-01-24 | 2019-04-26 | 华东理工大学 | Ligand exchange method prepares the nanocrystalline material of sulfate radical cladding |
| CN111647224A (en) * | 2019-03-04 | 2020-09-11 | 苏州星烁纳米科技有限公司 | Preparation method of quantum dot-polymer composite |
| CN111647224B (en) * | 2019-03-04 | 2023-03-31 | 苏州星烁纳米科技有限公司 | Preparation method of quantum dot-polymer composite |
| CN113000836A (en) * | 2021-03-08 | 2021-06-22 | 昆明理工大学 | Nickel coating surface treatment method for NaCl particles |
| WO2022206873A1 (en) * | 2021-04-02 | 2022-10-06 | 纳晶科技股份有限公司 | Nanocrystalline composition, preparation method therefor and application thereof |
| WO2023030194A1 (en) | 2021-09-06 | 2023-03-09 | 广东粤港澳大湾区国家纳米科技创新研究院 | Coated quantum dot material and preparation method therefor, and quantum dot optical device |
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