CN106206965A - 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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- CN106206965A CN106206965A CN201610541074.5A CN201610541074A CN106206965A CN 106206965 A CN106206965 A CN 106206965A CN 201610541074 A CN201610541074 A CN 201610541074A CN 106206965 A CN106206965 A CN 106206965A
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- quantum dot
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- packaging body
- polyreaction
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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
The preparation method of a kind of quantum dot packaging body, described preparation method includes making, between the part of multiple quantum dot surface, polyreaction occurs, makes the plurality of quantum dot form entirety.The quantum dot packaging body prepared by preparation method of the present invention, has more preferable stability, and the quantum dot being dispersed in quantum dot packaging body is difficult to reunion and concentration is higher, and optical property is more preferably.The invention allows for a kind of electroluminescent device, back light unit and display device.
Description
Technical field
The present invention relates to a kind of quantum dot packaging body and preparation method thereof, further relate to a kind of electroluminescent device and backlight list
Unit.
Background technology
Owing to quantum dot has, particle size is controlled, be uniformly dispersed, excite transformation efficiency high, stable and light efficiency is more high excellent
Point, it has bigger 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 be uniformly dispersed in film quantum dot.At luminescence generated by light
In device, typically quantum dot is dispersed in macromolecular material, and is packaged with glass or Obstruct membrane, obtained more steady
Fixed quantum dot.But, quantum dot upper limit of concentration in macromolecular material, typically below 30%, causes photo luminescent devices
Whole lighting efficiency is the highest.In electroluminescent device, the coating of quantum dot solution is typically formed by quantum dot light emitting layer, including
Quantum dot and covering quantum dot surface are for spreading the ligand component of solvent.Due to the interaction between each quantum dot only
For physical action, thus the post processing to quantum dot light emitting layer usually can destroy film layer.Therefore, for above-mentioned technical problem, have
Necessary preparation to quantum dot diaphragm further improves.
Summary of the invention
The technical problem to be solved is: provides the preparation method of a kind of quantum dot film, can make between quantum dot
Connected by chemical bond, increase the stability of quantum dot film.
The invention discloses the preparation method of a kind of quantum dot packaging body, described preparation method includes making multiple quantum dot table
There is polyreaction between the part in face, make the plurality of quantum dot form entirety.
Preferably, described polyreaction is condensation reaction.
Preferably, described polyreaction is sudden reaction.
Preferably, described polyreaction includes that the part of described quantum dot is anti-with the chemistry that the polymerizable components of interpolation occurs
Should.
Preferably, described quantum dot surface is modified with the first part, described first part include polymerizable groups and with
The coordinating group that the coordination of described quantum dot connects.
Preferably, one or more during described polymerizable groups includes double bond, carboxyl, sulfydryl, amino, hydroxyl.
Preferably, the one during described coordinating group includes sulfydryl, carboxyl, amino.
Preferably, described first part also includes the connection segment connecting described coordinating group and described polymerizable groups.
Preferably, the molecular weight of described connection segment is not higher than 400.
Preferably, the molecular weight of described connection segment is not higher than 200.
Preferably, the molecular weight of described connection segment is not higher than 100.
Preferably, described connection segment includes Polyethylene Glycol segment.
Preferably, described polyreaction generate group include the one in disulfide bond, amido link, ester bond, alkyl bond or
Person is multiple.
Preferably, described preparation method comprises the following steps: a) provide quantum dot solution, including quantum dot, initiator and
Solvent, described quantum dot surface is modified with polymerizable groups；B) it is applied to quantum dot solution preset in substrate, and evaporates molten
Agent；C) initiated polymerization.
The invention also discloses a kind of quantum dot packaging body, including material of main part be dispersed in described material of main part
Quantum dot, described quantum dot packaging body is prepared by preparation method as above, and described material of main part is by described quantum dot
Ligand polymer produces.
Preferably, described quantum dot mass fraction in described quantum dot packaging body is not less than 50%.
Preferably, described quantum dot mass fraction in described quantum dot packaging body is not less than 80%.
Preferably, described quantum dot packaging body is membranaceous.
The invention also discloses a kind of electroluminescent device, including quantum dot light emitting layer, described quantum dot light emitting layer is such as
The upper described quantum dot packaging body obtained by preparation method.
The invention also discloses a kind of back light unit, lead including one or more light source, light guide plate with described in being arranged on
Quantum dot packaging body near tabula rasa, described quantum dot packaging body is prepared by preparation method as above.
The invention also discloses a kind of display device, including back light unit as above and Liquid Crystal Module.
Compared with prior art, the method have the advantages that the quantum dot prepared by preparation method of the present invention
Packaging body, has more preferable stability, and the quantum dot being dispersed in quantum dot packaging body is difficult to reunion and concentration is higher, optical
Can be more preferably.More preferable luminescent properties is shown by the electroluminescent cell of the quantum dot film preparation of the present invention.
Accompanying drawing explanation
Fig. 1 be the quantum dot packaging body of a detailed description of the invention in the present invention part between connected mode schematic diagram；
Fig. 2 be the quantum dot packaging body of a detailed description of the invention in the present invention part between connected mode schematic diagram；
Fig. 3 be the quantum dot packaging body of a detailed description of the invention in the present invention part between connected mode schematic diagram；
Fig. 4 be the quantum dot packaging body of a detailed description of the invention in the present invention part between connected mode schematic diagram.
Detailed description of the invention
Below in conjunction with embodiment of the present invention, the technical scheme in the embodiment of the present invention is described in detail, aobvious
So, described embodiment is only a part of embodiment of the present invention rather than whole embodiment.Based in the present invention
Embodiment, the every other enforcement that those of ordinary skill in the art are obtained on the premise of not making creative work
Mode, broadly falls into scope.The accompanying drawing of the present invention is only schematically illustrate embodiments of the present invention, its concrete size
Ratio is as the criterion with description.
The invention discloses the preparation method of a kind of quantum dot packaging body, including making between the part of multiple quantum dot surface
There is polyreaction, make the plurality of quantum dot form entirety.
Quantum dot is a kind of nano material, deposits in media as well for stabilize it, and generally its surface is modified with part.Quantum
Quantum dot is essentially dispersed in the medium of solid-state, to form a tunic or other shapes of encapsulation by the application of point
Body.There is polyreaction between the part that the present invention is modified by quantum dot surface, make to connect into entirety between multiple quantum dot,
And then form membranaceous or other shapes of quantum dot package body structure.Quantum dot packaging body prepared by the present invention has preferably
Stability, the quantum dot being dispersed in quantum dot packaging body is difficult to reunion and concentration is higher, and optical property is more preferably.
Polyreaction includes but not limited to condensation reaction and sudden reaction.As in a detailed description of the invention, quantum dot
Surface is modified with double bond, occurs sudden reaction to make to aggregate into an entirety between quantum dot between double bond.Another embodiment party
In formula, quantum dot surface is modified with carboxylic acid and alcoholic extract hydroxyl group, by polycondensation dehydration, aggregate between multiple quantum dots one whole
Body.
In another embodiment, by polymerizable components between quantum dot, such as cross-linking agent, by joining of multiple quantum dots
Body is linked to together, forms entirety.Preferably, to include but not limited to that dihydroxylic alcohols, binary acid or intramolecular contain many for cross-linking agent
The compound of individual unsaturated double-bond.
Quantum dot surface is modified with the first part, and the first part includes polymerizable groups and connects with the coordination of described quantum dot
The coordinating group connect.Coordination group includes but not limited to sulfydryl, carboxyl, hydroxyl or amino.Polymerizable groups includes but does not limits
One or more in double bond, carboxyl, sulfydryl, amino, hydroxyl.In one preferred embodiment, the first part is also
Including connecting coordinating group and the connection segment of polymerizable groups.In quantum dot packaging body, the content of quantum dot is the highest more good, but
It is that the highest difficulty or ease that are easily caused form membranaceous solid, needs to be balanced on quantum dot content with film property.Exist for controlling part
Content in quantum dot packaging body, it is preferable that the molecular weight connecting segment is not higher than 400.It is highly preferred that connect the molecule of segment
Amount not higher than 200.Most preferably, the molecular weight connecting segment is not higher than 100.Connect segment and include but not limited to polyglycol chain
Section also includes alkyl chain, phenyl ring etc..
The group that polyreaction generates includes one or more in disulfide bond, ester bond, amido link, alkyl bond.Polymerization
Reaction generate the embodiment that group is disulfide bond as it is shown in figure 1, polyreaction generate the embodiment that group is ester bond
As in figure 2 it is shown, the embodiment that group is amido link that polyreaction generates is as it is shown on figure 3, the group that polyreaction generates is
The embodiment of alkyl bond is as shown in Figure 4.
In a detailed description of the invention, preparation method comprises the following steps: a) provide quantum dot solution, quantum dot solution
Including homodisperse quantum dot, initiator and solvent, the part that quantum dot surface is modified includes polymerizable groups；b)
It is applied to quantum dot solution preset in substrate, and evaporates solvent；C) initiated polymerization.The mode of coating includes but does not limits
In spin coating.Initiator includes but not limited to thermal initiator and light trigger.
In a detailed description of the invention, quantum dot solution is applied on the first Obstruct membrane, evaporates solvent formation amount
Son point layer, is arranged on the second Obstruct membrane on quantum dot layer, solidification.
The invention also discloses a kind of quantum dot packaging body, including material of main part and the amount being dispersed in material of main part
Sub-point, it is characterised in that quantum dot packaging body is prepared by preparation method as above, material of main part is gathered by the part of quantum dot
Close and produce.
For making quantum dot packaging body produce more preferable illumination effect, use less consumption, it is preferable that quantum dot exists simultaneously
Mass fraction in quantum dot packaging body is not less than 50%.It is highly preferred that the mass fraction that quantum dot is in quantum dot packaging body
It is not less than 80%.
The shape of quantum dot packaging body includes but not limited to membranaceous or strip.In one preferred embodiment, amount
Son point packaging body, for electroluminescent device, is set to membrane structure in the preparation process of quantum dot packaging body.
The invention also discloses a kind of electroluminescent device, including quantum dot light emitting layer, described quantum dot light emitting layer is such as
The upper described quantum dot packaging body obtained by preparation method.
The invention also discloses a kind of display device, including back light unit and Liquid Crystal Module.Back light unit include one or
The multiple light source of person, light guide plate and be arranged on the quantum dot packaging body near light guide plate, quantum dot packaging body is by making as above
Preparation Method prepares.In a detailed description of the invention, quantum dot packaging body is membranaceous, is arranged near the exiting surface of light guide plate.
In a detailed description of the invention, quantum dot packaging body is set to strip, is arranged near the incidence surface of light guide plate.
Although technical scheme has been done elaboration in greater detail and has enumerated by inventor, it will be appreciated that for
For those skilled in the art, above-described embodiment is modified and/or flexible or employing equivalent replacement scheme is obvious
, all can not depart from the essence of spirit of the present invention, the term occurred in the present invention for the elaboration of technical solution of the present invention and
Understand, can not be construed as limiting the invention.
Claims (20)
1. the preparation method of a quantum dot packaging body, it is characterised in that described preparation method includes making multiple quantum dot surface
Part between occur polyreaction, make the plurality of quantum dot form entirety.
Preparation method the most according to claim 1, it is characterised in that: described polyreaction is condensation reaction.
Preparation method the most according to claim 1, it is characterised in that: described polyreaction is sudden reaction.
Preparation method the most according to claim 1, it is characterised in that: described polyreaction includes the part of described quantum dot
The chemical reaction occurred with the polymerizable components added.
Preparation method the most according to claim 1, it is characterised in that: described quantum dot surface is modified with the first part, institute
State the first part and include polymerizable groups and the coordinating group being connected with described quantum dot.
Preparation method the most according to claim 5, it is characterised in that: described polymerizable groups includes double bond, carboxyl, mercapto
One or more in base, amino, hydroxyl.
Preparation method the most according to claim 5, it is characterised in that: described coordinating group includes in sulfydryl, carboxyl, amino
One.
Preparation method the most according to claim 1, it is characterised in that: described first part also includes connecting described dentate
Group and the connection segment of described polymerizable groups.
Preparation method the most according to claim 1, it is characterised in that: the molecular weight of described connection segment is not higher than 400.
Preparation method the most according to claim 1, it is characterised in that: the molecular weight of described connection segment is not higher than 200.
11. preparation methoies according to claim 1, it is characterised in that: the molecular weight of described connection segment is not higher than 100.
12. preparation methoies according to claim 1, it is characterised in that: described connection segment includes Polyethylene Glycol segment.
13. preparation methoies according to claim 1, it is characterised in that: the group that described polyreaction generates includes two sulfur
One or more in key, amido link, ester bond, alkyl bond.
14. preparation methoies according to claim 1, it is characterised in that: described preparation method comprises the following steps: a) provide
Quantum dot solution, including quantum dot, initiator and solvent, described quantum dot surface is modified with polymerizable groups；B) by quantum dot
Solution is applied to preset in substrate, and evaporates solvent；C) initiated polymerization.
15. 1 kinds of quantum dot packaging bodies, including material of main part and the quantum dot being dispersed in described material of main part, its feature
Being, described quantum dot packaging body is prepared by described preparation method arbitrary in claim 1 14, and described material of main part is by institute
The ligand polymer stating quantum dot produces.
16. quantum dot packaging bodies according to claim 15, it is characterised in that: described quantum dot encapsulates at described quantum dot
Mass fraction in body is not less than 50%.
17. quantum dot packaging bodies according to claim 15, it is characterised in that: described quantum dot encapsulates at described quantum dot
Mass fraction in body is not less than 80%.
18. 1 kinds of electroluminescent devices, it is characterised in that include that quantum dot light emitting layer, described quantum dot light emitting layer are that right is wanted
Seek arbitrary described quantum dot packaging body obtained by preparation method in 1 14.
19. 1 kinds of back light units, it is characterised in that include one or more light source, light guide plate and be arranged on described light guide plate
Neighbouring quantum dot packaging body, described quantum dot packaging body is prepared by described preparation method arbitrary in claim 1 14.
20. 1 kinds of display devices, it is characterised in that include back light unit as claimed in claim 20 and Liquid Crystal Module.
Applications Claiming Priority (2)
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| CN2016102606890 | 2016-04-25 | ||
| CN201610260689 | 2016-04-25 |
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| CN106206965B CN106206965B (en) | 2018-08-07 |
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| CN108587599A (en) * | 2018-03-28 | 2018-09-28 | 苏州星烁纳米科技有限公司 | Quantum dot dispersion |
| CN108997999A (en) * | 2018-06-14 | 2018-12-14 | 苏州星烁纳米科技有限公司 | Quantum dot and preparation method thereof |
| CN109962168A (en) * | 2017-12-26 | 2019-07-02 | Tcl集团股份有限公司 | A kind of film and QLED device |
| 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 |
| WO2020083394A1 (en) * | 2018-10-25 | 2020-04-30 | 纳晶科技股份有限公司 | Electroluminescent device, preparation method therefor, and nanocrystalline ink |
| CN115996994A (en) * | 2021-08-20 | 2023-04-21 | 京东方科技集团股份有限公司 | Quantum dot ink, quantum dot film, preparation method of quantum dot ink and quantum dot film, and display substrate |
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| CN106206965B (en) | 2018-08-07 |
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