CN109143438B - Quantum dot color light-filtering film based on micro-nano porous structure - Google Patents
Quantum dot color light-filtering film based on micro-nano porous structure Download PDFInfo
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- CN109143438B CN109143438B CN201811271010.3A CN201811271010A CN109143438B CN 109143438 B CN109143438 B CN 109143438B CN 201811271010 A CN201811271010 A CN 201811271010A CN 109143438 B CN109143438 B CN 109143438B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
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- 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
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- 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
- G02F1/1336—Illuminating devices
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- 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
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Led Device Packages (AREA)
- Luminescent Compositions (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a quantum dot color filter film based on a micro-nano porous structure, which is prepared by uniformly distributing quantum dots in holes of a micro-nano porous structure carrier, wherein the pore size of the micro-nano porous structure carrier is 20-1000 nm, the quantum dots are one or more of nano spherical, nano rod-shaped, nano disc-shaped and nano ellipsoid, the size of the quantum dots is 2-200 nm, and the pore size of the quantum dots is smaller than 1/2 of the pore size of the micro-nano porous structure carrier. The application of the micro-nano porous structure can simply and effectively improve the capture and absorption of the backlight, and meanwhile, the thickness of the material filter film and the self-absorption of the quantum dots are not increased. The color filter film can adjust the aperture and distribution of the porous structure and the particle size and morphology of the quantum dots according to the spectrum of the backlight light source, has good compatibility, and is beneficial to industrialization of large-area, flexible, light and thin color filter films.
Description
Technical Field
The invention belongs to the technical field of photoelectric display devices, and particularly relates to a quantum dot color light-filtering film based on a micro-nano porous structure.
Background
Color filters (Color filters), or Color conversion films, have important applications in the colorization of Liquid Crystal Displays (LCDs), surface-backlight Organic Light Emitting Devices (OLEDs), and micro-LEDs. However, conventional color filters use a pigment-based photoresist to absorb light at other wavelengths, thereby emitting light of a desired color. In this way, in the case of a white backlight, about 2/3% of light in the backlight is absorbed by the filter, and the utilization rate of light is greatly reduced, and at the same time, the transmission peak is wide, the color gamut is low, and it is difficult to satisfy the user's requirements for display image quality.
Quantum Dots (QD), also known as semiconductor nanocrystals, are approximately spherical, have three-dimensional sizes in the range of 2-10nm, and have significant Quantum effects. The quantum dots are generally made of semiconductor materials of II-VI group elements (such as CdS, CdSe, CdTe, ZnSe, ZnS and the like) or III-V group elements (cadmium-free quantum dots, such as InP, InAs and the like), and a core/shell structure (such as common CdSe/ZnS core/shell structure quantum dots and the like) can also be made of two or more semiconductor materials. The optical characteristics of the quantum dots are far superior to those of the traditional organic fluorescent dye, the quantum dots have the advantages of high photoluminescence yield, good stability, narrow light-emitting peak, simple adjustment of light-emitting color through the size, structure or components of the quantum dots, compatibility with printing process and the like, and are ideal materials for new-generation color filters.
When backlight provided by the backlight module is incident to the quantum dot color filter, quantum dots in the quantum dot color filter emit light with corresponding colors under the excitation of the backlight, but the absorption of the quantum dots to the backlight is not sufficient; adding a color filter is a strategy, but the increase of the thickness can aggravate the self-absorption of the quantum dots, so that the conversion efficiency is reduced. The upper surface of the current quantum dot color filter is further provided with a layer of filter to filter unabsorbed backlight, which obviously reduces the conversion efficiency of the backlight. Therefore, it is an urgent problem to improve the absorption of the quantum dot color filter to the backlight.
Disclosure of Invention
The invention aims to provide a quantum dot color light-filtering film based on a micro-nano porous structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
a quantum dot color filter film based on a micro-nano porous structure comprises quantum dots and a micro-nano porous structure carrier, wherein the quantum dots are uniformly distributed in holes of the micro-nano porous structure carrier;
the pore size of the micro-nano porous structure carrier is 20-1000 nm, the thickness is 50-50000 nm, and the pore size is at least larger than that of the micro-nano porous structure carrier;
the quantum dots are one or more of nano-spheres, nano-rods, nano-discs and nano-ellipsoids, the size of the quantum dots is 2-200 nm, and the size of the quantum dots is smaller than 1/2 of the pore size of the micro-nano porous structure carrier.
The micro-nano porous structure carrier can adopt any one of a porous polyimide film, a porous inorganic silicon dioxide film or a porous inorganic aluminum oxide film.
The quantum dots comprise core-shell structure quantum dots such as CdS, CdTe, CdSe, ZnSe, ZnTe, PbS, PbSe, InP, CuInS and the like; or an inorganic perovskite quantum dot ABX3, A2B2X6 or A3B3X9 structural system, wherein A is an inorganic metal element such as cesium or rubidium, B is lead, tin, antimony, tellurium or manganese, and X is one or more of F, Cl, Br or I; or a carbon quantum dot, graphene quantum dot system; or organic nanoparticles; or in situ synthesized quantum dots.
The micro-nano porous structure carrier has low absorptivity to ultraviolet and visible light, and the interface of the micro-nano porous structure carrier has high light reflectivity in an ultraviolet and visible light region. The micro-nano porous structure material has resistance to a quantum dot solvent, has good stability under the conditions of air, water, oxygen and illumination heating, and has no charge transfer and quenching with quantum dots.
The invention has the following remarkable advantages:
(1) according to the quantum dot color filter film, the micro-nano porous structure is utilized, so that the capturing and absorption of backlight can be simply and effectively improved, and meanwhile, the thickness of the material filter film and the self-absorption of quantum dots are not increased.
(2) The prepared color filter film can adjust the aperture and distribution of the porous structure and the particle size and morphology of the quantum dots according to the backlight light source spectrum, and has good compatibility.
(3) The quantum dot color filter film can be prepared by a simple printing process, and is beneficial to industrialization of large-area, flexible, light and thin color filter films.
Detailed Description
In order to make the present invention more comprehensible, the technical solutions of the present invention are further described below with reference to specific embodiments, but the present invention is not limited thereto.
The core-shell structure quantum dots are prepared according to the reference document 'Stable and effective quantum dot-dot light-emitting diodes based on solution-processed multilayered structures'; the porous film is prepared according to the literature of synthesis of non-soluble porous polyimide film and application performance analysis of the non-soluble porous polyimide film in the lithium battery diaphragm.
Example 1
1) Respectively adding core-shell structure quantum dots (the size of each quantum dot is 6-11 nm) of red, green and blue ZnSe/ZnS systems with oleylamine oleic acid ligands into octane, oscillating until the quantum dots are uniformly dispersed to obtain a 2wt% quantum dot solution, and filtering for later use;
2) manufacturing a black matrix on a porous PI film with the thickness of 3000 nm and the pore size of 600-1000 nm;
3) printing the prepared quantum dot solution in the specified black matrix gap, and packaging and protecting to obtain a color filter film;
4) the color filter film is combined with an ultraviolet LED backlight.
Example 2
1) Respectively adding core-shell quantum dots (the size of each quantum dot is 6-11 nm) of red and green ZnSe/ZnS systems with oleylamine oleic acid ligands into octane, oscillating until the quantum dots are uniformly dispersed to obtain a 2wt% quantum dot solution, and filtering for later use;
2) manufacturing a black matrix on a porous PI film with the thickness of 3000 nm and the pore size of 600-1000 nm;
3) printing the prepared quantum dot solution in the specified black matrix gap, and packaging and protecting to obtain a color filter film;
4) the color filter film is combined with a blue LED backlight.
Example 3
1) Respectively adding core-shell quantum dots (the size of each quantum dot is 6-11 nm) of red and green ZnSe/ZnS systems with oleylamine oleic acid ligands into octane, oscillating until the quantum dots are uniformly dispersed to obtain a 2wt% quantum dot solution, and filtering for later use;
2) manufacturing a black matrix on a porous inorganic silicon dioxide film with the thickness of 3000 nm and the pore size of 600-1000 nm;
3) printing the prepared quantum dot solution in the specified black matrix gap, and packaging and protecting to obtain a color filter film;
4) the color filter film is combined with a blue LED backlight.
Example 4
1) Respectively adding core-shell quantum dots (the size of each quantum dot is 6-11 nm) of red and green ZnSe/ZnS systems with oleylamine oleic acid ligands into octane, oscillating until the quantum dots are uniformly dispersed to obtain a 2wt% quantum dot solution, and filtering for later use;
2) manufacturing a black matrix on a porous inorganic alumina film with the thickness of 3000 nm and the pore size of 600-1000 nm;
3) printing the prepared quantum dot solution in the specified black matrix gap, and packaging and protecting to obtain a color filter film;
4) the color filter film is combined with a blue LED backlight.
Example 5
1) Respectively adding core-shell quantum dots (the size of each quantum dot is 6-11 nm) of red and green ZnSe/ZnS systems with oleylamine oleic acid ligands into octane, oscillating until the quantum dots are uniformly dispersed to obtain a 2wt% quantum dot solution, and filtering for later use;
2) manufacturing a black matrix on a porous inorganic silicon dioxide film with the thickness of 3000 nm and the pore size of 600-1000 nm;
3) printing the prepared quantum dot solution in the specified black matrix gap, and packaging and protecting to obtain a color filter film;
4) the color filter is combined with a white LED backlight.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (4)
1. A quantum dot color filter film based on a micro-nano porous structure comprises quantum dots and a micro-nano porous structure carrier, and is characterized in that the quantum dots are uniformly distributed in holes of the micro-nano porous structure carrier to prepare the quantum dot color filter film;
the micro-nano porous structure carrier comprises any one of a porous polyimide film, a porous inorganic silicon dioxide film or a porous inorganic alumina film; the pore size of the micro-nano porous structure carrier is 20-1000 nm, the thickness is 50-50000 nm, and the pore size is at least larger than that of the micro-nano porous structure carrier;
the quantum dots are one or more of nano-spheres, nano-rods, nano-discs and nano-ellipsoids, the size of the quantum dots is 2-200 nm, and the size of the quantum dots is smaller than 1/2 of the pore size of the micro-nano porous structure carrier;
the application method of the quantum dot color filter film is directly combined with blue light LED backlight.
2. The micro-nano porous structure based quantum dot color filter film according to claim 1, wherein the quantum dot is a core-shell structure quantum dot, an inorganic perovskite quantum dot, a carbon quantum dot, a graphene quantum dot or an organic nanoparticle.
3. The micro-nano porous structure based quantum dot color filter film according to claim 2, wherein the core-shell structure quantum dot comprises any one of CdS, CdTe, CdSe, ZnSe, ZnTe, PbS, PbSe, InP, and CuInS.
4. The micro-nano porous structure based quantum dot color filter film according to claim 2, wherein the structure type of the inorganic perovskite quantum dots is ABX3, A2B2X6 or A3B3X9, wherein A is an inorganic metal element, B is lead, tin, antimony, tellurium or manganese, and X is one or more of F, Cl, Br or I.
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| CN109669301A (en) * | 2019-03-01 | 2019-04-23 | 惠科股份有限公司 | Quantum dot color membrane substrates and display device |
| CN111273484B (en) * | 2020-03-11 | 2023-08-22 | 宁波东旭成新材料科技有限公司 | Non-resistance diaphragm quantum dot film |
| CN113651286B (en) * | 2020-05-12 | 2024-04-09 | 北京大学 | Quantum dot pixelized film and preparation method thereof |
| CN112379473A (en) * | 2020-11-14 | 2021-02-19 | 暨南大学 | Flexible tunable deep ultraviolet band-pass filter and preparation method thereof |
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| US4744635A (en) * | 1984-05-14 | 1988-05-17 | Nissha Printing Co., Ltd. | Color filter with a porous activated film layer having dye fixed in the minute pores to form color or pattern |
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