CN106206965B - A kind of quantum dot packaging body and preparation method thereof - Google Patents
A kind of quantum dot packaging body and preparation method thereof Download PDFInfo
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- CN106206965B CN106206965B CN201610541074.5A CN201610541074A CN106206965B CN 106206965 B CN106206965 B CN 106206965B CN 201610541074 A CN201610541074 A CN 201610541074A CN 106206965 B CN106206965 B CN 106206965B
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- quantum dot
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/115—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising active inorganic nanostructures, e.g. luminescent quantum dots
Abstract
A kind of preparation method of quantum dot packaging body, the preparation method include that polymerisation occurs between the ligand for making multiple quantum dot surfaces, and the multiple quantum dot is made to form entirety.The quantum dot packaging body that through the invention prepared by preparation method has better stability, and the quantum dot being dispersed in quantum dot packaging body is not easy to reunite and concentration is higher, and optical property is more preferably.The invention also provides a kind of electroluminescent device, back light unit and display devices.
Description
Technical field
The present invention relates to a kind of quantum dot packaging body and preparation method thereof, a kind of electroluminescent device and backlight list are further related to
Member.
Background technology
Since quantum dot has, particle size is controllable, be uniformly dispersed, excite high transformation efficiency, stabilization and light efficiency higher etc. excellent
Point has larger application prospect in display device field.In current quantum dot displays part application and development, it is broadly divided into
Photo luminescent devices and electroluminescent device.Two kinds of devices are required to quantum dot being uniformly dispersed in film.In luminescence generated by light
In device, generally quantum dot is dispersed in high molecular material, glass or Obstruct membrane is used in combination to be packaged, has been obtained more steady
Fixed quantum dot.But upper limit of concentration of the quantum dot in high molecular material is generally 30% hereinafter, lead to photo luminescent devices
Whole lighting efficiency is not high.In electroluminescent device, quantum dot light emitting layer is generally formed the coating of quantum dot solution, including
Quantum dot and covering quantum dot surface are used to spread the ligand component of solvent.Only due to the interaction between each quantum dot
For physical action, thus film layer can usually be destroyed to the post-processing of quantum dot light emitting layer.Therefore, in view of the above technical problems, have
Necessity is further improved the preparation of quantum dot diaphragm.
Invention content
The technical problems to be solved by the invention are：A kind of preparation method of quantum dot film is provided, can be made between quantum dot
It is keyed by chemistry, increases the stability of quantum dot film.
The invention discloses a kind of preparation method of quantum dot packaging body, the preparation method includes making multiple quantum dot tables
Polymerisation occurs between the ligand in face, the multiple quantum dot is made to form entirety.
Preferably, the polymerisation is condensation reaction.
Preferably, the polymerisation is sudden reaction.
Preferably, the polymerisation includes that the chemistry that occurs of the ligand of the quantum dot and the polymerizable components of addition is anti-
It answers.
Preferably, the quantum dot surface is modified with the first ligand, first ligand include polymerizable groups and with
The coordinating group of the quantum dot coordination connection.
Preferably, the polymerizable groups include one or more of double bond, carboxyl, sulfydryl, amino, hydroxyl.
Preferably, the coordinating group includes one kind in sulfydryl, carboxyl, amino.
Preferably, first ligand further includes the connection segment for connecting the coordinating group and the polymerizable groups.
Preferably, the molecular weight of the connection segment is not higher than 400.
Preferably, the molecular weight of the connection segment is not higher than 200.
Preferably, the molecular weight of the connection segment is not higher than 100.
Preferably, the connection segment includes polyethylene glycol segment.
Preferably, the group that the polymerisation generates include one kind in disulfide bond, amido bond, ester bond, alkyl bond or
Person is a variety of.
Preferably, the preparation method comprises the following steps：A) provide quantum dot solution, including quantum dot, initiator and
Solvent, the quantum dot surface are modified with polymerizable groups；B) quantum dot solution is applied in default substrate, and evaporated molten
Agent；C) initiated polymerization.
The invention also discloses a kind of quantum dot packaging body, including material of main part and it is dispersed in the material of main part
Quantum dot, the quantum dot packaging body is made by preparation method as described above, and the material of main part is by the quantum dot
Ligand polymer generates.
Preferably, mass fraction of the quantum dot in the quantum dot packaging body is not less than 50%.
Preferably, mass fraction of the quantum dot in the quantum dot packaging body is not less than 80%.
Preferably, the quantum dot packaging body is in membranaceous.
The invention also discloses a kind of electroluminescent device, including quantum dot light emitting layer, the quantum dot light emitting layer is such as
Quantum dot packaging body obtained by the upper preparation method.
The invention also discloses a kind of back light units, including one or more light source, light guide plate and setting are led described
Quantum dot packaging body near tabula rasa, the quantum dot packaging body are made by preparation method as described above.
The invention also discloses a kind of display devices, including back light unit as described above and Liquid Crystal Module.
Compared with prior art, the invention has the advantages that：The quantum dot that through the invention prepared by preparation method
Packaging body has better stability, and the quantum dot being dispersed in quantum dot packaging body is not easy to reunite and concentration is higher, optical
It can be more preferably.Better luminescent properties are shown by the electroluminescent cell of the quantum dot film preparation of the present invention.
Description of the drawings
Fig. 1 connected mode schematic diagrams between the ligand of the quantum dot packaging body of a specific implementation mode in the present invention；
Fig. 2 connected mode schematic diagrams between the ligand of the quantum dot packaging body of a specific implementation mode in the present invention；
Fig. 3 connected mode schematic diagrams between the ligand of the quantum dot packaging body of a specific implementation mode in the present invention；
Fig. 4 connected mode schematic diagrams between the ligand of the quantum dot packaging body of a specific implementation mode in the present invention.
Specific implementation mode
Below in conjunction with embodiment of the present invention, technical solution in the embodiment of the present invention is described in detail, and shows
So, described embodiment is only some embodiments of the invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Mode belongs to the scope of the present invention.The attached drawing of the present invention is only schematically illustrate embodiments of the present invention, specific size
Ratio is subject to description.
The invention discloses a kind of preparation methods of quantum dot packaging body, including make between the ligand of multiple quantum dot surfaces
Polymerisation occurs, the multiple quantum dot is made to form entirety.
Quantum dot is a kind of nano material, to make depositing in the medium for its stabilization, its usual surface modification have ligand.Quantum
Quantum dot is essentially dispersed in solid medium by the application of point, to form a tunic or other shapes of encapsulation
Body.Between ligand by quantum dot surface modification polymerisation occurs for the present invention, make to connect between multiple quantum dots it is integral,
And then form membranaceous or other shapes of quantum dot package body structure.Quantum dot packaging body prepared by the present invention has better
Stability, the quantum dot being dispersed in quantum dot packaging body is not easy to reunite and concentration is higher, and optical property is more preferably.
Polymerisation includes but not limited to condensation reaction and sudden reaction.Such as in a specific embodiment, quantum dot
Surface modification has double bond, and sudden reaction, which occurs, between double bond makes to aggregate into an entirety between quantum dot.In another embodiment party
In formula, quantum dot surface is modified with carboxylic acid and alcoholic extract hydroxyl group, by polycondensation dehydration, aggregated between multiple quantum dots one it is whole
Body.
In another embodiment, by polymerizable components, such as crosslinking agent between quantum dot, by matching for multiple quantum dots
Body is linked to together, is formed whole.Preferably, crosslinking agent include but not limited to dihydric alcohol, binary acid or intramolecular contain it is more
The compound of a unsaturated double-bond.
Quantum dot surface is modified with the first ligand, and the first ligand includes polymerizable groups and is coordinated company with the quantum dot
The coordinating group connect.It includes but not limited to sulfydryl, carboxyl, hydroxyl or amino to be coordinated group.Polymerizable groups include but unlimited
In one or more of double bond, carboxyl, sulfydryl, amino, hydroxyl.In one preferred embodiment, the first ligand is also
Connection segment including connecting coordinating group and polymerizable groups.In quantum dot packaging body, the higher the better for the content of quantum dot, but
It is that the higher difficulty or ease that easily lead to form membranaceous solid, needs to be balanced on film forming in quantum dot content.Ligand exists in order to control
Content in quantum dot packaging body, it is preferable that the molecular weight for connecting segment is not higher than 400.It is highly preferred that the molecule of connection segment
Amount is not higher than 200.Most preferably, the molecular weight for connecting segment is not higher than 100.It includes but not limited to polyglycol chain to connect segment
Section further includes alkyl chain, phenyl ring etc..
The group that polymerisation generates includes one or more of disulfide bond, ester bond, amido bond, alkyl bond.Polymerization
The group that reaction generates is the embodiment of disulfide bond as shown in Figure 1, the group that polymerisation generates is the embodiment of ester bond
As shown in Fig. 2, polymerisation generate group be amido bond embodiment as shown in figure 3, polymerisation generate group be
The embodiment of alkyl bond is as shown in Figure 4.
In a specific embodiment, preparation method includes the following steps：A) quantum dot solution, quantum dot solution are provided
It includes evenly dispersed quantum dot, initiator and solvent to include, and the ligand of quantum dot surface modification includes polymerizable groups；b)
Quantum dot solution is applied in default substrate, and evaporates solvent；C) initiated polymerization.The mode of coating includes but unlimited
In spin coating.Initiator includes but not limited to thermal initiator and photoinitiator.
In a specific embodiment, quantum dot solution is applied on the first Obstruct membrane, evaporates solvent forming amount
Son point layer, the second Obstruct membrane is arranged on quantum dot layer, solidification.
The invention also discloses a kind of quantum dot packaging body, including material of main part and the amount that is dispersed in material of main part
Sub- point, which is characterized in that quantum dot packaging body is made by preparation method as described above, and material of main part is gathered by the ligand of quantum dot
It closes and generates.
To make quantum dot packaging body generate better illumination effect, while using less dosage, it is preferable that quantum dot exists
Mass fraction in quantum dot packaging body is not less than 50%.It is highly preferred that mass fraction of the quantum dot in quantum dot packaging body
Not less than 80%.
The shape of quantum dot packaging body includes but not limited to membranaceous or strip.In one preferred embodiment, it measures
Son point packaging body is used for electroluminescent device, and membrane structure is set in the preparation process of quantum dot packaging body.
The invention also discloses a kind of electroluminescent device, including quantum dot light emitting layer, the quantum dot light emitting layer is such as
Quantum dot packaging body obtained by the upper preparation method.
The invention also discloses a kind of display devices, including back light unit and Liquid Crystal Module.Back light unit include one or
Person's multiple light sources, light guide plate and the quantum dot packaging body being arranged near light guide plate, quantum dot packaging body by making as described above
Preparation Method is made.In a specific embodiment, quantum dot packaging body is membranaceous, is arranged near the light-emitting surface of light guide plate.
In a specific embodiment, quantum dot packaging body is set as strip, is arranged near the incidence surface of light guide plate.
Although inventor has done more detailed elaboration to technical scheme of the present invention 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 spirit of that invention, the term occurred in the present invention be used for elaboration to technical solution of the present invention and
Understand, can not be construed as limiting the invention.
Claims (20)
1. a kind of preparation method of quantum dot packaging body, which is characterized in that the preparation method includes making multiple quantum dot surfaces
Ligand between polymerisation occurs, so that the multiple quantum dot is formed entirety.
2. preparation method according to claim 1, it is characterised in that：The polymerisation is condensation reaction.
3. preparation method according to claim 1, it is characterised in that：The polymerisation is sudden reaction.
4. preparation method according to claim 1, it is characterised in that：The polymerisation includes the ligand of the quantum dot
The chemical reaction occurred with the polymerizable components of addition.
5. preparation method according to claim 1, it is characterised in that：The quantum dot surface is modified with the first ligand, institute
It includes polymerizable groups and the coordinating group that is connect with the quantum dot to state the first ligand.
6. preparation method according to claim 5, it is characterised in that：The polymerizable groups include double bond, carboxyl, mercapto
One or more of base, amino, hydroxyl.
7. preparation method according to claim 5, it is characterised in that：The coordinating group includes in sulfydryl, carboxyl, amino
One kind.
8. preparation method according to claim 5, it is characterised in that：First ligand further includes the connection dentate
The connection segment of group and the polymerizable groups.
9. preparation method according to claim 8, it is characterised in that：The molecular weight of the connection segment is not higher than 400.
10. preparation method according to claim 8, it is characterised in that：The molecular weight of the connection segment is not higher than 200.
11. preparation method according to claim 8, it is characterised in that：The molecular weight of the connection segment is not higher than 100.
12. preparation method according to claim 8, it is characterised in that：The connection segment includes polyethylene glycol segment.
13. preparation method according to claim 1, it is characterised in that：The group that the polymerisation generates includes two sulphur
One or more of key, amido bond, ester bond, alkyl bond.
14. preparation method according to claim 1, it is characterised in that：The preparation method comprises the following steps：A) it provides
Quantum dot solution, including quantum dot, initiator and solvent, the quantum dot surface are modified with polymerizable groups；B) by quantum dot
In solution coating to default substrate, and evaporate solvent；C) initiated polymerization.
15. a kind of quantum dot packaging body, including material of main part and the quantum dot being dispersed in the material of main part, feature
It is, the quantum dot packaging body is made by any preparation method in claim 1-14, and the material of main part is by institute
The ligand polymer for stating quantum dot generates.
16. quantum dot packaging body according to claim 15, it is characterised in that：The quantum dot is encapsulated in the quantum dot
Mass fraction in body is not less than 50%.
17. quantum dot packaging body according to claim 15, it is characterised in that：The quantum dot is encapsulated in the quantum dot
Mass fraction in body is not less than 80%.
18. a kind of electroluminescent device, which is characterized in that including quantum dot light emitting layer, the quantum dot light emitting layer is wanted for right
Seek the quantum dot packaging body obtained by any preparation method in 1-14.
19. a kind of back light unit, which is characterized in that including one or more light source, light guide plate and setting in the light guide plate
Neighbouring quantum dot packaging body, the quantum dot packaging body are made by any preparation method in claim 1-14.
20. a kind of display device, which is characterized in that including back light unit as claimed in claim 19 and Liquid Crystal Module.
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| CN2016102606890 | 2016-04-25 | ||
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109962168B (en) * | 2017-12-26 | 2021-03-23 | Tcl科技集团股份有限公司 | Thin film and QLED device |
| CN108587599A (en) * | 2018-03-28 | 2018-09-28 | 苏州星烁纳米科技有限公司 | Quantum dot dispersion |
| CN108997999B (en) * | 2018-06-14 | 2021-03-02 | 苏州星烁纳米科技有限公司 | Quantum dot and preparation method thereof |
| CN109599496B (en) * | 2018-10-25 | 2021-04-27 | 纳晶科技股份有限公司 | Electroluminescent device, preparation method thereof and nanocrystalline ink |
| CN110265585A (en) * | 2019-06-18 | 2019-09-20 | 京东方科技集团股份有限公司 | A kind of preparation method of film of nanoparticles, electronic building brick, display base plate and display device |
| WO2023019593A1 (en) * | 2021-08-20 | 2023-02-23 | 京东方科技集团股份有限公司 | Quantum dot ink, quantum dot film and preparation method therefor, and display substrate |
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| WO2014209154A1 (en) * | 2013-06-27 | 2014-12-31 | Optogan - Organic Lightning Solution, Llc (Optogan-Osr, Llc) | Organic light-emitting element with the radiating layer containing quantum dots with modified surface |
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| CN101283454A (en) * | 2005-08-25 | 2008-10-08 | 爱德华·萨金特 | Quantum dot optical devices with enhanced gain and sensitivity and methods of making same |
| WO2012151032A1 (en) * | 2011-04-13 | 2012-11-08 | Brookhaven Science Associates, Llc | Methods for the bio-programmable crystallization of multi-component functional nanoparticle systems |
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