CN107987826A - Preparation method, application process and the quantum dot product of quantum dot - Google Patents

Preparation method, application process and the quantum dot product of quantum dot Download PDF

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Publication number
CN107987826A
CN107987826A CN201810002724.8A CN201810002724A CN107987826A CN 107987826 A CN107987826 A CN 107987826A CN 201810002724 A CN201810002724 A CN 201810002724A CN 107987826 A CN107987826 A CN 107987826A
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quantum dot
ligand
netted
preparation
dissolved
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梅文海
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BOE Technology Group Co Ltd
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BOE Technology Group Co Ltd
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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
    • C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • 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
    • C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
    • C09K2211/18—Metal complexes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biophysics (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Luminescent Compositions (AREA)

Abstract

The invention discloses a kind of preparation method of quantum dot, application process and quantum dot product, it is related to technology of quantum dots field, for in quantum dot solution, preventing water oxygen molecule and other quantum dot molecules invasion quantum dot core, and then improve the illumination effect and luminous efficiency of quantum dot.The main technical schemes of the present invention are the preparation method of quantum dot, including：First, quantum dot sample is dissolved in organic solvent, obtains sample solution；Then, netted ligand is dissolved in the sample solution, obtains the quantum dot with netted ligand.Present invention is mainly used for preserve quantum dot.

Description

Preparation method, application process and the quantum dot product of quantum dot
Technical field
The present invention relates to technology of quantum dots field, more particularly to a kind of preparation method of quantum dot, application process and amount Son point product.
Background technology
Quantum dot is a kind of semiconductor nano, it has unique characteristics of luminescence, can be widely used in photoelectricity skill In art field, wherein, light emitting diode with quantum dots display is exactly the display device for preparing quantum dot as luminescent layer, quantum Point luminescent diode has the advantages that colour gamut is high, corresponding speed is fast, there is common quanta point material in light emitting diode with quantum dots Cadmium system quantum dot, perovskite quantum dot, indium phosphide quantum dot, indium sulphur quantum dot etc..
But since the quantum dot core of quantum dot does not have the protection of shell, when preserving quanta point material, preserve in solution Water oxygen molecule will from the gap between quantum dot ligand progressively close to quantum dot core, cause lacking for quantum dot core surface Fall into, influence luminous efficiency, in addition, also can be close to each other between multiple quantum dot cores and cause coagulation, influence illumination effect.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of preparation method of quantum dot, application process and quantum dot product, Main purpose is used in quantum dot solution, prevents water oxygen molecule and other quantum dot molecules invasion quantum dot core, and then Improve the illumination effect and luminous efficiency of quantum dot.
To reach above-mentioned purpose, present invention generally provides following technical solution：
On the one hand, an embodiment of the present invention provides a kind of preparation method of quantum dot, including：
Quantum dot sample is dissolved in organic solvent, obtains sample solution；
Netted ligand is dissolved in the sample solution, obtains the quantum dot with netted ligand.
Further, the coordination atom of the quantum dot sample ligand is phosphorus atoms or oxygen atom.
Further, the coordination atom of the netted ligand is nitrogen-atoms.
Further, the bridge linkage group of the netted ligand is ester bond, amido link or ehter bond.
Further, the organic solvent is alkane solvents.
Further, quantum dot that is described that netted ligand is dissolved in the sample solution, obtaining having netted ligand, Including：
Netted ligand is dissolved in the sample solution, the netted ligand concentration is reached 15%-20%, to obtain Quantum dot with netted ligand.
On the other hand, the embodiment of the present invention also provides a kind of quantum dot product, including：
The quantum dot with netted ligand.
On the other hand, the embodiment of the present invention also provides a kind of application process of quantum dot, including：
Quantum dot with netted ligand is dissolved in the first solvent, the net structure of the netted ligand is broken, obtains To the quantum dot with wire ligand；
The quantum dot with wire ligand is dissolved in the second solvent containing thiol ligand, obtains matching somebody with somebody with sulfydryl The quantum dot of body.
Further, first solvent is organic acid soln or organic alkali solution.
Further, the concentration of thiol ligand is 8%-12% in second solvent.
An embodiment of the present invention provides a kind of preparation method of quantum dot, in quantum dot solution, preventing water oxygen point Sub and other quantum dot molecules invade quantum dot core, and then improve the illumination effect and luminous efficiency of quantum dot.It is and existing In technology, quantum dot is during preservation, since the quantum dot core of quantum dot does not have the protection of shell, so the water oxygen in solution Molecule will from the gap between quantum dot ligand progressively close to quantum dot core, the defects of causing quantum dot core surface, shadow Ring luminous efficiency, in addition, also can be close to each other between quantum dot core and cause coagulation, influence illumination effect.With prior art phase Than the preparation method for the quantum dot that present specification provides includes, and first, quantum dot sample is dissolved in organic solvent, is obtained To sample solution, then, netted ligand is dissolved in sample solution, obtains the quantum dot with netted ligand.Due to netted The steric hindrance of ligand is larger, thus the quantum dot with netted ligand can by netted ligand stop solution in water oxygen molecule with And the invasion of other quantum dot molecules, and then the illumination effect and luminous efficiency of quantum dot can be improved.
Brief description of the drawings
Fig. 1 is the flow chart of the preparation method of quantum dot provided in an embodiment of the present invention；
Fig. 2 is the structural formula of netted ligand provided in an embodiment of the present invention；
Fig. 3 is the reaction mechanism schematic diagram of the preparation method of quantum dot provided in an embodiment of the present invention；
Fig. 4 is the flow chart of the application process of quantum dot provided in an embodiment of the present invention；
Fig. 5 is the reaction mechanism schematic diagram of the application process of quantum dot provided in an embodiment of the present invention；
Fig. 6 is the reaction mechanism schematic diagram of netted ligand provided in an embodiment of the present invention.
Embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, below in conjunction with Attached drawing and preferred embodiment, to the preparation method according to quantum dot proposed by the present invention its embodiment, structure, feature and Its effect, describes in detail as after.
As shown in Figure 1, an embodiment of the present invention provides a kind of preparation method of quantum dot, including：
Quantum dot sample, be dissolved in organic solvent by step 101, obtains sample solution；
Wherein, quantum dot sample can be the quantum dot of non-core shell structure, such as：Perovskite quantum dot, indium phosphide quantum Point, indium sulphur quantum dot etc., wherein, which can use solvent-thermal method to prepare, and organic solvent can be then alkane Varsol, such as：Hexane solution etc., is not limited thereto.
Step 102, as shown in Fig. 2, netted ligand is dissolved in sample solution, obtain the quantum with netted ligand Point.
Wherein, netted ligand can be used and is chemically synthesized, and belong to common technical means in the art, no longer superfluous herein State；And the coordination ability of the coordination atom of netted ligand can be more than the ligand of quantum dot sample, when netted ligand is dissolved in sample During product solution, netted ligand can react with quantum dot sample, as shown in figure 3, making netted ligand and quantum dot sample Ligand mutually replace, the netted ligand of larger steric hindrance, Jin Erneng are formed around the quantum dot core of such quantum dot sample Enough prevent the invasion of the water oxygen molecule and quantum dot molecule in solution.
An embodiment of the present invention provides a kind of preparation method of quantum dot, in quantum dot solution, preventing water oxygen point Sub and other quantum dot molecules invade quantum dot core, and then improve the illumination effect and luminous efficiency of quantum dot.It is and existing In technology, quantum dot is during preservation, since the quantum dot core of quantum dot does not have the protection of shell, so the water oxygen in solution Molecule will from the gap between quantum dot ligand progressively close to quantum dot core, the defects of causing quantum dot core surface, shadow Ring luminous efficiency, in addition, also can be close to each other between quantum dot core and cause coagulation, influence illumination effect.With prior art phase Than the preparation method for the quantum dot that present specification provides includes, and first, quantum dot sample is dissolved in organic solvent, is obtained To sample solution, then, netted ligand is dissolved in sample solution, obtains the quantum dot with netted ligand.Due to netted The steric hindrance of ligand is larger, thus the quantum dot with netted ligand can by netted ligand stop solution in water oxygen molecule with And the invasion of other quantum dot molecules, and then the illumination effect and luminous efficiency of quantum dot can be improved.
Further, the coordination atom of quantum dot sample ligand is phosphorus or oxygen, and the coordination atom of netted ligand is nitrogen.This reality Apply in example, since the coordination ability of phosphorus atoms is better than phosphorus atoms and oxygen atom, so when netted ligand is dissolved in sample solution, Netted ligand can replace quantum dot sample ligand, make the net structure ligand that larger steric hindrance is formed around quantum dot core, into And the invasion of hydrone and other quantum dot molecules can be prevented.
Further, the bridge linkage group of netted ligand is ester bond, amido link or ehter bond.In the present embodiment, ester bond, amido link Or ehter bond be can secondary opening group, so when needing to prepare electroluminescent device, can pass through acid-base solution will The net structure of netted ligand is again turned on, and to access the short chain thiol ligand that can lift carrier transmission characteristics, is formed Suitable for the quantum dot of electroluminescent device.
Further, organic solvent is alkane solvents.Alternatively, organic solvent can be hexane.
Further, netted ligand is dissolved in sample solution, netted ligand concentration is reached 15%-20%, with To the quantum dot with netted ligand.In the present embodiment, the concentration of netted ligand is 15%-20%, dense due to netted ligand Degree is higher, and the netted ligand of high concentration can improve the replacement efficiency between netted ligand and quantum dot sample ligand, ensures Replace effect.
The quantum dot for convenience with netted ligand preserves, and after above-mentioned steps 102, can also include：To have The quantum dot of netted ligand is separated out from sample solution, and the netted ligand after precipitation is redissolved in organic solution, this Sample can remove the impurity in sample solution, improve the preservation effect of the quantum dot with netted ligand, be conducive to quantum dot Application, wherein, the precipitation mode of the above-mentioned quantum dot with netted ligand can have it is a variety of, such as：Can be to sample solution The middle ethyl acetate for adding the pure concentration of analysis separates out quantum dot.
On the other hand, the embodiment of the present invention additionally provides a kind of quantum dot product, including：Quantum with netted ligand Point.
An embodiment of the present invention provides a kind of quantum dot product, in quantum dot solution, prevent water oxygen molecule and Other quantum dot molecules invade quantum dot core, improve the illumination effect and luminous efficiency of quantum dot.And in the prior art, quantum Point is during preservation, since the quantum dot core of quantum dot does not have the protection of shell, so water oxygen molecule in solution will be from Gap between quantum dot ligand progressively close to quantum dot core, the defects of causing quantum dot core surface, influence luminous efficiency, In addition, also can be close to each other between quantum dot core and cause coagulation, influence illumination effect.Compared with prior art, the application text The quantum dot product that part provides includes, and has the quantum dot of netted ligand, since the steric hindrance of netted ligand is larger, so having net The quantum dot of shape ligand can stop the invasion of the water oxygen molecule and other quantum dot molecules in solution by netted ligand, And then the illumination effect and luminous efficiency of quantum dot can be improved.
On the other hand, as shown in Figure 4,5, the embodiment of the present invention additionally provides a kind of application process of quantum dot, including：
Step 201, as shown in fig. 6, the quantum dot with netted ligand is dissolved in the first solvent, make the net of netted ligand Shape structural break, obtains the quantum dot with wire ligand；
Step 202, by the quantum dot with wire ligand be dissolved in the second solvent containing thiol ligand, obtains with mercapto The quantum dot of ylidene ligands.
Wherein, quantum dot is commonly applied in light emitting diode with quantum dots, for shining, and the quantum dot with netted ligand The preservation of quantum dot is only applicable to, and is not suitable for the luminous application of quantum dot, it is first in order to improve the illumination effect of quantum dot First, the quantum dot with netted ligand is dissolved in the first solvent, the net structure of netted ligand is broken, obtains with wire The quantum dot of ligand；Then, the quantum dot with wire ligand is dissolved in the second solvent containing thiol ligand, is had The quantum dot of thiol ligand.In the present embodiment, after the net structure fracture in the quantum dot with netted ligand, had The quantum dot of thiol ligand, and thiol ligand can lift the transmission characteristic of carrier in Light-Emitting Diode, improve illumination effect.
Further, the first solution is organic acid soln or organic alkali solution.In the present embodiment, by organic acid soln or Net structure in netted ligand can be broken by organic alkali solution, and in order to accelerate breaking effect, mixed solution can be carried out The operations such as heating, stirring.
Further, the concentration of thiol ligand is 8%-12% in the second solvent.In the present embodiment, sulphur is former in thiol ligand The coordination ability of son is stronger, and the concentration of thiol ligand is 8%-12% in the second solvent, so in high concentration and sulphur atom The strong collective effect of coordination ability under, first wife's body that thiol ligand can be substituted into quantum dot forms the amount with thiol ligand It is sub-, and it is suitable for electroluminescent device.
The embodiment of the present embodiment is as follows：
First, 5% acetic acid will be added in the quantum dot solution with netted ligand, is heated to 70 degrees Celsius, stirring 2 is small When, open the bridge linkage group of netted ligand.
Then, the ethyl acetate for analyzing pure concentration is added, it is after separating out quantum dot, the quantum dot after precipitation is again molten Solution obtains transition solution in hexane solution.
Finally, the ethyl mercaptan of 10% concentration is added into transition solution, obtains the quantum dot with ethyl mercaptan ligand.
The above description is merely a specific embodiment, but protection scope of the present invention is not limited thereto, any Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims (10)

  1. A kind of 1. preparation method of quantum dot, it is characterised in that including：
    Quantum dot sample is dissolved in organic solvent, obtains sample solution；
    Netted ligand is dissolved in the sample solution, obtains the quantum dot with netted ligand.
  2. 2. the preparation method of quantum dot according to claim 1, it is characterised in that
    The coordination atom of the quantum dot sample ligand is phosphorus atoms or oxygen atom.
  3. 3. the preparation method of quantum dot according to claim 2, it is characterised in that
    The coordination atom of the netted ligand is nitrogen-atoms.
  4. 4. the preparation method of quantum dot according to claim 3, it is characterised in that
    The bridge linkage group of the netted ligand is ester bond, amido link or ehter bond.
  5. 5. the preparation method of quantum dot according to claim 4, it is characterised in that
    The organic solvent is alkane solvents.
  6. 6. the preparation method of quantum dot according to claim 5, it is characterised in that
    It is described that netted ligand is dissolved in the sample solution, the quantum dot with netted ligand is obtained, including：
    Netted ligand is dissolved in the sample solution, the netted ligand concentration is reached 15%-20%, to be had The quantum dot of netted ligand.
  7. A kind of 7. quantum dot product, it is characterised in that including：
    The quantum dot with netted ligand as any one of claim 1 to 6.
  8. A kind of 8. application process of quantum dot, it is characterised in that including：
    Quantum dot with netted ligand is dissolved in the first solvent, the net structure of the netted ligand is broken, is had There is the quantum dot of wire ligand；
    The quantum dot with wire ligand is dissolved in the second solvent containing thiol ligand, obtains that there is thiol ligand Quantum dot.
  9. 9. the application process of quantum dot according to claim 8, it is characterised in that
    First solvent is organic acid soln or organic alkali solution.
  10. 10. the application process of quantum dot according to claim 9, it is characterised in that
    The concentration of thiol ligand is 8%-12% in second solvent.
CN201810002724.8A 2018-01-02 2018-01-02 Preparation method, application process and the quantum dot product of quantum dot Pending CN107987826A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116333742A (en) * 2021-12-24 2023-06-27 苏州星烁纳米科技有限公司 Method for improving solubility of quantum dots in ester solvents, quantum dot dispersion liquid and application thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1660960A (en) * 2005-02-01 2005-08-31 武汉大学 Method for preparing water-soluble quantum point of biological functionalized sugar
CN101962450A (en) * 2010-10-20 2011-02-02 武汉大学 Aqueous phase preparation method for chitosan-quantum dot fluorescent probe
CN107118773A (en) * 2017-06-23 2017-09-01 国家纳米科学中心 A kind of inorganic achirality quantum dot of gel load

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1660960A (en) * 2005-02-01 2005-08-31 武汉大学 Method for preparing water-soluble quantum point of biological functionalized sugar
CN101962450A (en) * 2010-10-20 2011-02-02 武汉大学 Aqueous phase preparation method for chitosan-quantum dot fluorescent probe
CN107118773A (en) * 2017-06-23 2017-09-01 国家纳米科学中心 A kind of inorganic achirality quantum dot of gel load

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116333742A (en) * 2021-12-24 2023-06-27 苏州星烁纳米科技有限公司 Method for improving solubility of quantum dots in ester solvents, quantum dot dispersion liquid and application thereof
CN116333742B (en) * 2021-12-24 2024-05-24 苏州星烁纳米科技有限公司 Method for improving solubility of quantum dots in ester solvents, quantum dot dispersion liquid and application thereof

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