CN108587598A - Quantum dot dispersion - Google Patents
Quantum dot dispersion Download PDFInfo
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- CN108587598A CN108587598A CN201810244619.5A CN201810244619A CN108587598A CN 108587598 A CN108587598 A CN 108587598A CN 201810244619 A CN201810244619 A CN 201810244619A CN 108587598 A CN108587598 A CN 108587598A
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- quantum dot
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- dot dispersion
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/56—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing sulfur
- C09K11/562—Chalcogenides
- C09K11/565—Chalcogenides with zinc cadmium
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- 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
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- Luminescent Compositions (AREA)
Abstract
The present invention relates to a kind of quantum dot dispersions.The quantum dot dispersion includes：Non-polar organic solvent; with the quantum dot being dispersed in the non-polar organic solvent; the quantum dot includes ontology, is formed on the body outer surface protective layer, the first ligand being connected on the protective layer, first ligand have the first group being connected with the protective layer and second group affine with the non-polar organic solvent.In this quantum dot dispersion, quantum dot is not only with good stability, and can be dissolved in common non-polar organic solvent, so as to use this quantum dot well.
Description
Technical field
The application belongs to technology of quantum dots field, more particularly to a kind of quantum dot dispersion.
Background technology
Quantum dot is also known as semiconductor nano, and the half-peak breadth of emission spectrum is very narrow, thus electroluminescent field,
The fields such as luminescence generated by light field and biomarker have very extensive purposes.
Quantum dot compound usually is formed by coating protective layer (such as aluminium hydroxide) on the surface of quantum dot, by
This can improve the stability of quantum dot.However, the quantum dot for having coated aluminium hydroxide is not dissolved in, there are commonly solvents, such as
Toluene, liquid alkane etc., this causes to be difficult to use this quantum dot well.
Invention content
In view of the above technical problems, the application provides a kind of quantum dot dispersion.In the quantum dot dispersion of the application
In system, quantum dot not only has protective layer, and is also associated with the group affine with non-polar organic solvent on the protection layer, such as
This quantum dot is not only with good stability, and can be dissolved in common non-polar organic solvent, so as to make well
With this quantum dot.
Include according to the quantum dot dispersion of the application：Non-polar organic solvent, and it is dispersed in non-polar organic solvent
In quantum dot.Quantum dot includes ontology, is formed on body outer surface protective layer, connection first matching on the protection layer
Body.First ligand has the first group being connected with protective layer and second group affine with non-polar organic solvent.
Protective layer can play a protective role to quantum dot, and the first ligand has second affine with non-polar organic solvent
Group, such quantum dot is not only with good stability, and can be dissolved in common non-polar organic solvent, so as to good
This quantum dot is used well.
In one embodiment, protective layer is aluminium hydroxide.In another embodiment, the first group is carboxyl or ammonia
Base.Inventors be surprised to learn that can quickly form stable connection between carboxyl or amino and aluminium hydroxide, and form this company
It connects without heating, special catalyst, extreme acid-base property, this even to be directly added into the ligand containing carboxyl or amino
Into the disperse system containing quantum dot, ligand fast automatic can be connected on quantum dot, and which strongly simplifies experiments to grasp
Make.
In one embodiment, the second group is the aliphatic alkyl of C6-C22.
In a preferred embodiment, also there is substituent group, substituent group to be substitution or not take on aliphatic alkyl
The alicyclic alkyl of the C4-C22 in generation, and/or the aromatic hydrocarbyl of substitution or the C6-C22 not replaced.
In this application, term " substitution () " refers at least one by substitution chosen from the followings of wherein its hydrogen atom
Compound, group or the part that base replaces：C1-C30 alkyl, C2-C30 alkynyls, C6-C30 aryl, C7-C30 alkaryls, C1-
C30 alkoxies, C1-C30 miscellaneous alkyls, the miscellaneous alkaryls of C3-C30, C3-C30 naphthenic base, C3-C15 cycloalkenyl groups, C6-C30 cycloalkynyl radicals,
C2-C30 Heterocyclylalkyls, halogen (- F ,-Cl ,-Br or-I), aldehyde radical (- C (=O) H), carbamoyl (- C (O) NH2), ester group
Group's (- C (=O) OR, wherein R are C1-C6 alkyl or C6-C12 aryl), with and combinations thereof.
Term " substitution () " can also refer at least one of wherein its hydrogen atom and be replaced by substituent group chosen from the followings
Compound, group or part：Hydroxyl (- OH), amino (- NRR', wherein R and R' independently are hydrogen or C1-C6 alkyl), mercapto
Group (- SH), carboxylic acid group (- COOH) or its salt (- C (=O) OM, wherein M are organic or inorganic cation), sulfonic acid group (-
SO3) or its salt (- SO H3M, wherein M be organic or inorganic cation), phosphate group (- PO3H2) or its salt (- PO3MH or-
PO3M2, wherein M is organic or inorganic cation), and combinations thereof.
Substitution mode, the quantity of substituent group of these known substituent groups of those skilled in the art, to ensure the second group
With the compatibility of non-polar organic solvent.
In a preferred embodiment, the first ligand is oleic acid or oleyl amine.
In one embodiment, non-polar organic solvent is toluene or liquid alkane.
In a embodiment, in mass, the content of quantum dot is 1.2%-3.6%, the content of the first ligand is 2%-
4%, surplus is the non-polar organic solvent.Generally, it is considered that the amount of the first ligand is more, be more conducive to quantum dot in nonpolarity
Dissolving in solvent.However, inventors be surprised to learn that, in the scheme of the application, the first ligand is in quantum dot dispersion
Content and dissolubility of the quantum dot in dispersion are not linear relationship.When in mass, the content of quantum dot is
1.2%-3.6%, when the content of the first ligand is less than 2%, having part quantum dot cannot dissolve；And when the content of the first ligand
When more than 4%, and has part quantum dot and be precipitated.And ought in mass, the content of quantum dot is 1.2%-3.6%, first matches
The content of body is 2%-4%, and when surplus is the non-polar organic solvent, quantum dot can be stably dissolved in nonpolar solvent
In, to form stable quantum dot dispersion.
In one embodiment, the surface of ontology is also associated with Ligands, and protective layer covers Ligands.At one
In embodiment, Ligands are one or more in oleic acid, oleyl amine, mercaptan, trioctylphosphine oxide (TOPO), tri octyl phosphine.For having closed
At quantum dot for, its usual surface is connected with ligand (being equal to the Ligands in the application), so that quantum dot energy
It is enough to be steadily dispersed or dissolved in solvent.In the scheme of the application, even if there are Ligands, will not poorly it influence
Thus protective layer and the first ligand greatly simplifie the preparation of the quantum dot dispersion of the application.
Compared with prior art, it is the advantages of the application：The protective layer of quantum dot can play a protective role to quantum dot,
And the first ligand has second group affine with non-polar organic solvent, such quantum dot is not only with good stability,
And it can be dissolved in common non-polar organic solvent, so as to use this quantum dot well.
Description of the drawings
Fig. 1 a are the TEM photos of the sample of embodiment 1；
Fig. 1 b are the quantum dots of embodiment 1 before dissolving and dissolved emission spectrum；
Fig. 2 a are the TEM photos of the sample of embodiment 2；
Fig. 2 b are the quantum dots of embodiment 2 before dissolving and dissolved emission spectrum；
Fig. 3 a are the TEM photos of the sample of embodiment 3；
Fig. 3 b are the quantum dots of embodiment 3 before dissolving and dissolved emission spectrum；
Fig. 4 a are the TEM photos of the sample of embodiment 3；And
Fig. 4 b are the quantum dots of embodiment 4 before dissolving and dissolved emission spectrum.
Identical component has used identical reference numeral in the accompanying drawings.Attached drawing only symbolically shows the reality of the application
Apply scheme.
Specific implementation mode
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：
Choose 120mg quantum dot compound CdSe/Al (OH)3, that is, ontology CdSe, protective layer are Al (OH)3.Second matches
Body is oleic acid.Non-polar organic solvent is toluene, volume 5ml.Quantum dot compound and toluene are mixed, the first mixture is formed
System.At this point, quantum dot compound exists in toluene with precipitated form.
200 μ L oleic acid are added into the first mixed system, after simple concussion, quantum dot compound dissolves to form stable amount
Son point dispersion.TEM photos are had taken to the quantum dot in quantum dot dispersion, such as Fig. 1 a.In fig 1 a, dark parts
11 be the ontology of quantum dot, and light-colored part 12 is protective layer Al (OH)3。
Also quantum dot compound is tested before dissolving and dissolved emission spectrum (that is, PL) using Fluorescence Spectrometer,
Such as Fig. 1 b.In Figure 1b, curve 13 is emission spectrum of the quantum dot compound before dissolving, and curve 14 is quantum dot compound
Emission spectrum after dissolution.From Fig. 1 b, it can be seen that, in quantum dot compound before dissolving and after dissolving, emission spectrum is almost
Do not change, to contribute to the use of quantum dot.
Embodiment 2：
Choose 72mg quantum dot composite I nP/Al (OH)3, that is, ontology InP, protective layer are Al (OH)3.Ligands
For n- dodecyl mereaptan.Non-polar organic solvent is normal octane, volume 6ml.Quantum dot compound and normal octane are mixed, form the
One mixed system.At this point, quantum dot compound exists in normal octane with precipitated form.
120 μ L oleic acid are added into the first mixed system, after simple concussion, quantum dot compound dissolves to form stable amount
Son point dispersion.TEM photos are had taken to the quantum dot in quantum dot dispersion, such as Fig. 2 a.In fig. 2 a, dark parts
21 be the ontology of quantum dot, and light-colored part 22 is protective layer Al (OH)3。
Also quantum dot compound is tested before dissolving and dissolved emission spectrum (that is, PL) using Fluorescence Spectrometer,
Such as Fig. 2 b.In figure 2b, curve 23 is emission spectrum of the quantum dot compound before dissolving, and curve 24 is quantum dot compound
Emission spectrum after dissolution.From Fig. 2 b, it can be seen that, in quantum dot compound before dissolving and after dissolving, emission spectrum is almost
Do not change, to contribute to the use of quantum dot.
Embodiment 3：
Choose 48mg quantum dot compound CdS/Al (OH)3, that is, ontology CdS, protective layer are Al (OH)3.Ligands
For oleyl amine.Non-polar organic solvent is chloroform, volume 4ml.Quantum dot compound and chloroform are mixed, the first mixture is formed
System.At this point, quantum dot compound exists in chloroform with precipitated form.
80 μ L oleyl amines are added into the first mixed system, after simple concussion, quantum dot compound dissolves to form stable amount
Son point dispersion.TEM photos are had taken to the quantum dot in quantum dot dispersion, such as Fig. 3 a.In fig. 3 a, dark parts
31 be the ontology of quantum dot, and light-colored part 32 is protective layer Al (OH)3。
Also quantum dot compound is tested before dissolving and dissolved emission spectrum (that is, PL) using Fluorescence Spectrometer,
Such as Fig. 3 b.In fig 3b, curve 33 is emission spectrum of the quantum dot compound before dissolving, and curve 34 is quantum dot compound
Emission spectrum after dissolution.From Fig. 3 b, it can be seen that, in quantum dot compound before dissolving and after dissolving, emission spectrum is almost
Do not change, to contribute to the use of quantum dot.
Embodiment 4：
Choose 144mg quantum dot compound ZnSe/Al (OH)3, that is, ontology ZnSe, protective layer are Al (OH)3.Second matches
Body is trioctylphosphine oxygen phosphorus.Non-polar organic solvent is normal heptane, volume 4ml.Quantum dot compound and normal heptane are mixed, formed
First mixed system.At this point, quantum dot compound exists in normal heptane with precipitated form.
160 μ L oleyl amines are added into the first mixed system, after simple concussion, quantum dot compound dissolves to form stable amount
Son point dispersion.TEM photos are had taken to the quantum dot in quantum dot dispersion, such as Fig. 4 a.In fig.4, dark parts
41 be the ontology of quantum dot, and light-colored part 42 is protective layer Al (OH)3。
Also quantum dot compound is tested before dissolving and dissolved emission spectrum (that is, PL) using Fluorescence Spectrometer,
Such as Fig. 4 b.In fig. 4b, curve 43 is emission spectrum of the quantum dot compound before dissolving, and curve 44 is quantum dot compound
Emission spectrum after dissolution.From Fig. 4 b, it can be seen that, in quantum dot compound before dissolving and after dissolving, emission spectrum is almost
Do not change, to contribute to the use of quantum dot.
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. quantum dot dispersion, including：Non-polar organic solvent, and the quantum that is dispersed in the non-polar organic solvent
Point,
The quantum dot includes ontology, is formed on the body outer surface protective layer, be connected on the protective layer
One ligand,
First ligand has the first group for being connected with the protective layer and affine with the non-polar organic solvent the
Two groups.
2. quantum dot dispersion according to claim 1, which is characterized in that the protective layer is aluminium hydroxide.
3. quantum dot dispersion according to claim 2, which is characterized in that first group is carboxyl or amino.
4. quantum dot dispersion according to claim 2 or 3, which is characterized in that second group is C6-C22's
Aliphatic alkyl.
5. quantum dot dispersion according to claim 4, which is characterized in that also have substitution on the aliphatic alkyl
Group,
The substituent group is the alicyclic alkyl of substitution or the C4-C22 not replaced, and/or the C6-C22 for replacing or not replacing
Aromatic hydrocarbyl.
6. the quantum dot dispersion according to any one of claim 2 to 5, which is characterized in that first ligand is
Oleic acid or oleyl amine.
7. the quantum dot dispersion according to any one of claim 1 to 6, which is characterized in that the nonpolarity is organic
Solvent is toluene, chloroform or liquid alkane.
8. the quantum dot dispersion according to any one of claim 1 to 7, which is characterized in that in mass, the amount
The content of son point is 1.2%-3.6%, the content of first ligand is 2%-4%, and surplus is the non-polar organic solvent.
9. the quantum dot dispersion according to any one of claim 1 to 8, which is characterized in that the surface of the ontology
Ligands are also associated with, the protective layer covers the Ligands.
10. quantum dot dispersion according to claim 9, which is characterized in that the Ligands be oleic acid, oleyl amine,
It is one or more in mercaptan, trioctylphosphine oxide (TOPO), tri octyl phosphine.
Applications Claiming Priority (2)
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| CN201810175910 | 2018-03-02 | ||
| CN2018101759101 | 2018-03-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019161588A1 (en) * | 2018-02-22 | 2019-08-29 | 苏州星烁纳米科技有限公司 | Quantum dot composite, preparation method therefor and quantum dot composite dispersion system |
| CN111352298A (en) * | 2018-12-21 | 2020-06-30 | 苏州星烁纳米科技有限公司 | Dispersion liquid, photoresist composition, color film substrate and display device |
| CN111378447A (en) * | 2018-12-27 | 2020-07-07 | Tcl集团股份有限公司 | Post-processing method of quantum dots |
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|---|---|---|---|---|
| WO2019161588A1 (en) * | 2018-02-22 | 2019-08-29 | 苏州星烁纳米科技有限公司 | Quantum dot composite, preparation method therefor and quantum dot composite dispersion system |
| CN111352298A (en) * | 2018-12-21 | 2020-06-30 | 苏州星烁纳米科技有限公司 | Dispersion liquid, photoresist composition, color film substrate and display device |
| CN111352298B (en) * | 2018-12-21 | 2023-09-01 | 苏州星烁纳米科技有限公司 | Dispersion, photoresist composition, color film substrate and display device |
| CN111378447A (en) * | 2018-12-27 | 2020-07-07 | Tcl集团股份有限公司 | Post-processing method of quantum dots |
| CN111378447B (en) * | 2018-12-27 | 2021-12-14 | Tcl科技集团股份有限公司 | Post-processing method of quantum dots |
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