CN110591447A - Ink composition, quantum dot color film and display device - Google Patents
Ink composition, quantum dot color film and display device Download PDFInfo
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- CN110591447A CN110591447A CN201910752610.XA CN201910752610A CN110591447A CN 110591447 A CN110591447 A CN 110591447A CN 201910752610 A CN201910752610 A CN 201910752610A CN 110591447 A CN110591447 A CN 110591447A
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- quantum dot
- color film
- ink composition
- hyperbranched
- dot color
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/38—Inkjet printing inks characterised by non-macromolecular additives other than solvents, pigments or dyes
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
Abstract
The application discloses an ink composition for preparing a quantum dot color film, the quantum dot color film and a display device. The ink composition comprises the following components in percentage by weight: 0.1-30 wt% of quantum dots, 5-40 wt% of photopolymerizable hyperbranched molecules, 5-15 wt% of monomers, 0.1-5 wt% of photoinitiator and the balance of solvent. The photopolymerizable hyperbranched molecules are used as the precursor of the quantum dot polymer layer, so that the content of volatile monomers can be reduced, and the thicknesses of the quantum dot polymer layers in different pixel openings are kept consistent; and the hyperbranched molecules have better dispersibility in the ink composition and smaller viscosity, and are easy to reach higher content.
Description
Technical Field
The application relates to the field of display, in particular to an ink composition for preparing a quantum dot color film, the quantum dot color film and a display device.
Background
The color film is a key component for realizing color of the display device, and the color film can convert light with a certain wavelength or wavelength range into light with another wavelength or wavelength range, so that pixel units with different colors on the display panel are formed.
The quantum dots have the advantages of narrow emission half-peak width, good luminescence stability and the like, and are widely used as wavelength conversion materials in quantum dot color films, so that the color gamut of display equipment can be improved. The existing common preparation method of the quantum dot color film comprises the following steps: and (2) after the pixel substrate is placed in the printing cavity, printing the light-curable quantum dot ink composition in the pixel opening, taking the pixel substrate out of the printing cavity, and placing the pixel substrate in an ultraviolet curing device for complete curing, thereby obtaining the quantum dot color film. However, in the existing common quantum dot ink composition, the used resin is generally a linear resin with higher viscosity, so that the content of the resin in the ink composition is lower, and the content of the volatile monomer is higher.
Thus, it is easy to cause that the monomer in the pixel opening printed earlier volatilizes more, the thickness of the obtained quantum dot polymer layer is smaller, and the thickness of the quantum dot polymer layer in different pixel openings is inconsistent.
Disclosure of Invention
An object of the present application is to provide an ink composition for preparing a quantum dot color film, a quantum dot color film and a display device, so as to solve the problem of inconsistent thickness of quantum dot polymer layers in different pixel openings.
According to one aspect of the application, an ink composition for preparing a quantum dot color film is provided, which comprises the following components in percentage by weight: 0.1-30 wt% of quantum dots, 5-40 wt% of photopolymerizable hyperbranched molecules, 5-15 wt% of monomers, 0.1-5 wt% of photoinitiator and the balance of solvent.
Preferably, the molecular weight of the hyperbranched molecule is between 1 and 20 million.
Preferably, the hyperbranched molecule is at least one of hyperbranched polyethyleneimine, hyperbranched polyacrylate, hyperbranched polyepoxy resin, and hyperbranched polyamide.
Preferably, the boiling point of the solvent is 100-350 ℃ under normal pressure.
Preferably, the solvent is cyclohexylbenzene, isobornyl acrylate or methyl methacrylate.
Preferably, the hyperbranched molecule is a hyperbranched polyacrylate.
According to another aspect of the present application, there is provided a quantum dot color film, including: a transparent substrate; a plurality of pixel openings and a black matrix disposed on the transparent substrate to space the pixel openings; at least a portion of the pixel openings contain a quantum dot polymer layer therein, the quantum dot polymer layer being prepared from the ink composition as described above.
Preferably, the thickness of the quantum dot polymer layer is substantially equal to the depth of the pixel opening.
According to another aspect of the present application, a display device is provided, which includes a backlight unit, a liquid crystal layer, and a quantum dot color film disposed in a light exit direction of the liquid crystal layer, where the quantum dot color film is the quantum dot color film.
According to another aspect of the present application, there is provided a display device including: the quantum dot color film structure comprises a substrate with a plurality of pixel regions, an electroluminescent device and a quantum dot color film, wherein the electroluminescent device is located in the pixel regions, the quantum dot color film is arranged on the light emergent side of the electroluminescent device, pixel openings of the quantum dot color film are arranged in one-to-one correspondence with the pixel regions of the substrate, and the quantum dot color film is the quantum dot color film.
The application has the following beneficial effects: the photopolymerizable hyperbranched molecules are used as the precursor of the quantum dot polymer layer, so that the content of volatile monomers can be reduced, and the thicknesses of the quantum dot polymer layers in different pixel openings are kept consistent; and the hyperbranched molecules have better dispersibility in the ink composition and smaller viscosity, and are easy to reach higher content.
Drawings
Fig. 1 is a schematic structural diagram of a quantum dot color film according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a display device according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a display device according to another embodiment of the present application;
FIG. 4 shows the results of a step tester for printing a starting point in example 1 of the present application;
fig. 5 shows the results of the step tester for the printing end point in example 1 of the present application.
Detailed Description
The technical solutions in the examples of the present application will be described in detail below with reference to the embodiments of the present application. It should be noted that the described embodiments are only some embodiments of the present application, and not all embodiments.
According to some exemplary embodiments of the present application, there is provided an ink composition for preparing a quantum dot color film, including, by weight: 0.1-30 wt% of quantum dots, 5-40 wt% of photopolymerizable hyperbranched molecules, 5-15 wt% of monomers, 0.1-5 wt% of photoinitiator and the balance of solvent.
The hyperbranched molecule and the linear polymer are structurally different from each other in that, for example, the linear portion of the linear polymer is the majority, the branch point is very small, the molecular chain is easily entangled, the viscosity of the system rapidly increases with the increase in the relative molecular mass, so that the linear polymer is not favorable for dispersion in the ink composition, and the content of the linear polymer is limited to a reduced range in order to maintain the proper viscosity of the ink composition when the linear polymer is used as a component of the ink composition. The hyperbranched molecules are different, the molecules mainly comprise a branched part, the number of branching points is large, the molecules have a compact structure similar to a sphere, the hydrodynamic radius of gyration is small, the molecular chain entanglement is small, and therefore the influence of the increase of the relative molecular mass on the viscosity is small. Thus, when hyperbranched molecules are used as a component of the ink composition, the hyperbranched molecules are more easily dispersed in the ink composition; and even when the relative molecular mass of the hyperbranched molecule is larger, although the boiling point of the hyperbranched molecule is increased, the viscosity of the hyperbranched molecule is still smaller, so that the viscosity of the ink composition can be adjusted more conveniently, the content of the hyperbranched molecule in the ink composition can be kept higher, and the problem that the volatile component in the ink composition is higher in the prior art can be solved.
In one embodiment, the molecular weight of the hyperbranched molecule is between 1 and 20 million. The hyperbranched molecule can be hyperbranched polyethyleneimine, hyperbranched polyacrylate, hyperbranched polyepoxy resin or hyperbranched polyamide.
In the application, the size of the quantum dots is preferably 1-15 nm. The quantum dots may be group IIB-VIA quantum dots, group IIIA-VA quantum dots, group IVA-VIA quantum dots, group IVA quantum dots, group IB-IIIA-VIA quantum dots, group VIII-VIA quantum dots, or perovskite quantum dots, but are not limited thereto.
In the application, the IIB-VIA quantum dots are not limited to a binary element structure composed of IIB elements and VIA elements, but may be a ternary element structure, such as two IIB elements and one VIA element or one IIB element and two VIA elements; or a four-element structure, such as two IIB elements and two VIA elements. The IIB-VIA group quantum dots can be of a single-shell or multi-shell structure, for example, when the single-shell is ZnS, the IIB-VIA group quantum dots can be CdSe/ZnS, CdSeS/ZnS and the like; for example, when the multi-shell layer is ZnSe/ZnS, the IIB-VIA group quantum dots can be CdSe/ZnSe/ZnS, CdSeS/ZnSe/ZnS and the like. Similar to the IIB-VIA group quantum dots, the IIIA-VA group quantum dots, the IVA-VIA group quantum dots, the IVA group quantum dots, the IB-IIIA-VIA group quantum dots and the VIII-VIA group quantum dots are not limited to be composed of one element or two or three elements.
In the process of preparing a quantum dot color film, the solvent in the ink composition is removed after being printed in a pixel opening, so that the boiling point of the solvent cannot be too high or too low, and is preferably between 100 and 350 ℃. The solvent may be cyclohexylbenzene, isobornyl acrylate or methyl methacrylate.
In a preferred embodiment, the hyperbranched molecule is a hyperbranched polyacrylate and the monomer is an acrylate, so that the compatibility of the hyperbranched molecule with the monomer can be further increased due to the acrylic group-containing functional groups of both the hyperbranched molecule and the monomer. The inventor finds in experiments that in the existing common ink, the linear polyacrylic resin is easy to volatilize in printing, and the resin is basically not volatilized after the hyperbranched acrylic ester is adopted.
In an exemplary embodiment of the present application, as shown in fig. 1, a quantum dot color film 10 is provided, which includes: the display device comprises a transparent substrate 11, a black matrix 12 which is arranged on the surface of the transparent substrate 11 and is provided with a plurality of pixel openings 13, wherein at least part of the pixel openings 13 contain a quantum dot polymer layer 131, and the quantum dot polymer layer 131 comprises hyperbranched molecules and quantum dots dispersed in the hyperbranched molecules. The thickness of the quantum dot polymer layer 131 is substantially equal to the depth of the pixel opening 13. Some of the pixel openings 13 are also not filled with quantum dot polymer layer (labeled 132) so that, in use, light from the backlight can pass directly through to form another pixel color in the display device.
In an embodiment of the present disclosure, a display device 2 is provided, which includes a backlight unit 22, a quantum dot color film 20, and a liquid crystal layer 21 interposed between the backlight unit 22 and the quantum dot color film 20.
In one embodiment of the present application, there is provided a display device 3 including a substrate 31 having a plurality of pixel regions 311; an electroluminescent device 312 in the pixel region 311; and the pixel opening 33 of the quantum dot color film 30 is arranged corresponding to the pixel region 311 of the substrate 31, facing the quantum dot color film 30 of the substrate 31.
Example 1
An ink composition is provided, comprising: 15 wt% of red-emitting CdSe/ZnS quantum dots, 30 wt% of hyperbranched polyacrylate with the molecular weight of about 3 ten thousand, 10 wt% of acrylic monomer, 2 wt% of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, and the balance of cyclohexylbenzene.
Providing a transparent glass substrate containing a black matrix, placing the substrate in a printing cavity, printing the ink composition in pixel openings of the black matrix by using an ink-jet printer, fully filling all the pixel openings which are preset in the pixel openings and emit red, wherein the volume of the ink composition slightly exceeds the volume of the pixel openings, taking the substrate out of a vacuum box for treatment for 2 minutes, removing almost all cyclohexylbenzene, and irradiating under ultraviolet light of 60 milliwatts per square centimeter for 60 seconds to obtain a quantum dot color film containing a quantum dot polymer layer.
And performing step profiler test on the thicknesses of the printing initial position and the quantum dot polymer layer at the printing end position in the quantum dot color film.
Fig. 4 shows the results of the step-meter test of the quantum dot polymer layer printed with the starting point, in which it can be seen that the height of the quantum dot polymer layer printed with the starting point is about 2.583 micrometers.
Fig. 5 shows the results of the step-profiler test of the printed-end quantum dot polymer layer, where the printed-end quantum dot polymer layer has a height of about 2.591 microns.
The above results show that the thickness of the quantum dot polymer layer printed in different pixel openings on the substrate is substantially uniform.
Although the present disclosure has been described and illustrated in greater detail by the inventors, it should be understood that modifications and/or alterations to the above-described embodiments, or equivalent substitutions, will be apparent to those skilled in the art without departing from the spirit of the disclosure, and that no limitations to the present disclosure are intended or should be inferred therefrom.
Claims (10)
1. An ink composition for preparing a quantum dot color film comprises the following components in percentage by weight: 0.1-30 wt% of quantum dots, 5-40 wt% of photopolymerizable hyperbranched molecules, 5-15 wt% of monomers, 0.1-5 wt% of photoinitiator and the balance of solvent.
2. The ink composition of claim 1, wherein the molecular weight of the hyperbranched molecule is between 1 and 20 million.
3. The ink composition of claim 1, wherein the hyperbranched molecule is at least one of hyperbranched polyethyleneimine, hyperbranched polyacrylate, hyperbranched polyepoxy resin, and hyperbranched polyamide.
4. The ink composition of claim 1, wherein the solvent has a boiling point between 100 and 350 degrees celsius at atmospheric pressure.
5. The ink composition of claim 1, wherein the solvent is cyclohexylbenzene, isobornyl acrylate, or methyl methacrylate.
6. The ink composition of claim 1, wherein the hyperbranched molecule is a hyperbranched polyacrylate.
7. A quantum dot color film, comprising:
a transparent substrate; a plurality of pixel openings and a black matrix disposed on the transparent substrate to space the pixel openings; at least a portion of the pixel openings contain a quantum dot polymer layer therein, the quantum dot polymer layer being prepared from the ink composition of any one of claims 1 to 6.
8. The quantum dot color film of claim 7, wherein the thickness of the quantum dot polymer layer is substantially equal to the depth of the pixel opening.
9. A display device, comprising:
the liquid crystal display device comprises a backlight unit, a liquid crystal layer and a quantum dot color film arranged in the light emergent direction of the liquid crystal layer, wherein the quantum dot color film is the quantum dot color film in claim 7.
10. A display device, comprising:
a substrate having a plurality of pixel regions;
an electroluminescent device in the pixel region; and
the quantum dot color film is arranged on the light emitting side of the electroluminescent device, the pixel openings of the quantum dot color film are arranged in one-to-one correspondence with the pixel regions of the substrate, and the quantum dot color film is the quantum dot color film in claim 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910752610.XA CN110591447A (en) | 2019-08-15 | 2019-08-15 | Ink composition, quantum dot color film and display device |
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| CN201910752610.XA CN110591447A (en) | 2019-08-15 | 2019-08-15 | Ink composition, quantum dot color film and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114806274A (en) * | 2021-01-28 | 2022-07-29 | 北京京东方技术开发有限公司 | Ink, display substrate and manufacturing method thereof, and display panel |
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| CN105219163A (en) * | 2015-10-16 | 2016-01-06 | Tcl集团股份有限公司 | A kind of quantum dot ink of spray ink Printing and preparation method and quantum dot light emitting layer |
| CN105223724A (en) * | 2015-10-08 | 2016-01-06 | 深圳市华星光电技术有限公司 | Quantum dot liquid crystal indicator |
| CN105278150A (en) * | 2015-11-05 | 2016-01-27 | 深圳市华星光电技术有限公司 | Quantum dot color film substrate, manufacture method thereof and liquid crystal display device |
| CN109370312A (en) * | 2018-08-09 | 2019-02-22 | 苏州佳生物科技有限公司 | A kind of quantum dot ink and its application |
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| CN104377226A (en) * | 2013-08-14 | 2015-02-25 | 业鑫科技顾问股份有限公司 | Display panel |
| CN105223724A (en) * | 2015-10-08 | 2016-01-06 | 深圳市华星光电技术有限公司 | Quantum dot liquid crystal indicator |
| CN105219163A (en) * | 2015-10-16 | 2016-01-06 | Tcl集团股份有限公司 | A kind of quantum dot ink of spray ink Printing and preparation method and quantum dot light emitting layer |
| CN105278150A (en) * | 2015-11-05 | 2016-01-27 | 深圳市华星光电技术有限公司 | Quantum dot color film substrate, manufacture method thereof and liquid crystal display device |
| CN109370312A (en) * | 2018-08-09 | 2019-02-22 | 苏州佳生物科技有限公司 | A kind of quantum dot ink and its application |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114806274A (en) * | 2021-01-28 | 2022-07-29 | 北京京东方技术开发有限公司 | Ink, display substrate and manufacturing method thereof, and display panel |
| CN114806274B (en) * | 2021-01-28 | 2023-11-10 | 北京京东方技术开发有限公司 | Ink, display substrate, manufacturing method of display substrate and display panel |
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