CN104501043A - Long-service-life quantum dot fluorescent composite thin film and preparation method thereof - Google Patents
Long-service-life quantum dot fluorescent composite thin film and preparation method thereof Download PDFInfo
- Publication number
- CN104501043A CN104501043A CN201410809497.1A CN201410809497A CN104501043A CN 104501043 A CN104501043 A CN 104501043A CN 201410809497 A CN201410809497 A CN 201410809497A CN 104501043 A CN104501043 A CN 104501043A
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- China
- Prior art keywords
- quantum dot
- layer
- laminated film
- dot layer
- gas barrier
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/40—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters with provision for controlling spectral properties, e.g. colour, or intensity
Abstract
The invention provides a long-service-life quantum dot fluorescent composite thin film. The outermost layer of the quantum dot fluorescent composite thin film is a protection film layer and the middle layer of the quantum dot fluorescent composite thin film is a quantum dot layer. The protection film layer and the quantum dot layer can be stuck together. The invention further provides a preparation method of the quantum dot fluorescent composite thin film. The preparation method comprises the following steps: coating glue containing a quantum dot layer material on the surface of a base material; after the glue is cured, forming the quantum dot layer; and covering protection films on the upper and lower surfaces, and the side face of the quantum dot layer. According to the prepared quantum dot fluorescent composite thin film, the stability and the durability of a quantum dot are improved.
Description
Technical field
The present invention relates to technology of quantum dots field, long-life quantum dot fluorescence laminated film of one particularly relating to stability and the durability that can improve quantum dot and preparation method thereof.
Background technology
Technology of quantum dots is applied to field of display devices, can improve display effect, improves colour vividness, colour gamut and colour rendering index etc., makes the colour gamut of display bring up to 100%NTSC from 70%NTSC.Use the display device of technology of quantum dots, its display performance can compare favourably with using the display device of OLED technology.
Be applied to the LED-backlit module of display device, its method producing white light has: 1. by the light that blue-ray LED sends, excite yellow fluorescent powder to send gold-tinted, blue light and yellow light mix form white light; 2. the light sent by ruddiness, green glow and blue-ray LED is mixed to form white light; 3. the excitated red and green quantum dot fluorescent material of the light sent with blue-ray LED, red, green, blue three Colored light mixing forms white light; 4. excitated red, the green and blue quantum dot fluorescent material of the light sent with ultraviolet leds, red, green, blue three Colored light mixing forms white light.
But the stability of quantum dot itself is easily by the impact of external substance, and these materials comprise steam, oxygen, some VOC (VOC) etc.Therefore, finding the method for protection quantum dot, itself and external interference material are completely cut off, is the key that can technology of quantum dots be applied in display industry and other field.
At present about the bibliographical information of technology of quantum dots, mainly concentrate on the color of quantum dot itself and the raising aspect to display performance.And it is few for the research of quantum dot stability aspect.
Therefore, for the stability problem of quantum dot, the invention provides a kind of method protecting quantum dot and film thereof.
Summary of the invention
The present invention aims to provide the guard method of a kind of quantum dot and film thereof, improves the stability of quantum dot, extends the service life of quantum dot fluorescence film.
For achieving the above object, technical scheme provided by the invention is as follows:
Containing a sandwich construction fluorescent composite thin film for quantum dot, its outermost layer is protective film, and intermediate layer is quantum dot layer.The all protected rete in two surfaces and side up and down of quantum dot layer covers.Protective film can intercept extraneous steam, oxygen, VOC (comprising organic amine, alcohols) enter quantum dot layer.
As a further improvement on the present invention, described quantum dot layer is made up of quantum dot fluorescence material, fluoropolymer resin, light diffusion particle, light stabilizer, antioxidant.Wherein, light stabilizer can improve the stability of quantum dot under blue light or UV-irradiation, antioxidant can delay oxygen or other oxidant to the destruction of quantum dot, and quantum dot fluorescence material is Patent Application Publication No is material described in the patent of invention of CN102676174 A and CN103242831 A.
As a further improvement on the present invention, the glow color of described quantum dot fluorescence material is red, green and blue.
As a further improvement on the present invention, the emission wavelength of described red quantum point fluorescent material is 600nm ~ 640nm.
As a further improvement on the present invention, the emission wavelength of described green quantum dot fluorescent material is 500nm ~ 550nm.
As a further improvement on the present invention, the emission wavelength of described blue quantum dot fluorescent material is 430nm ~ 480nm.
As a further improvement on the present invention, when incident ray is blue light, described quantum dot fluorescence material comprises red quantum point and green quantum dot.
As a further improvement on the present invention, when incident ray is ultraviolet light, described quantum dot fluorescence material comprises red quantum point, green quantum dot and blue quantum dot.
As a further improvement on the present invention, the content of described quantum dot fluorescence material in quantum dot layer is 0.01% ~ 10%.
As a further improvement on the present invention, described light stabilizer is one or more in benzophenone and derivative, BTA and derivative thereof, piperidines and derivative thereof.
As a further improvement on the present invention, the content of described light stabilizer in quantum dot layer is 0.1% ~ 5%.
As a further improvement on the present invention, described antioxidant is one or more in phosphorous acid esters, phenols, monothioester class, thioether, disulphide, mercaptan.
As a further improvement on the present invention, the content of described antioxidant in quantum dot layer is 0.1% ~ 5%.
As a further improvement on the present invention, the preparation method that other component (composition of filmogen (i.e. fluoropolymer resin), light diffusion particle, solvent and consumption, the selection of base material) of described quantum dot layer and fluorescence membrane preparation method are the fluorescent optical membrane described in the patent of invention of CN103408984 A with reference to patent application publication number.
As a further improvement on the present invention, after described quantum dot layer solidification, can be separated with its base material, become the fluorescence membrane of self-supporting.
As a further improvement on the present invention, the thickness of described quantum dot layer is 1 μm ~ 500 μm.
As a further improvement on the present invention, the thickness of described quantum dot layer is 5 μm ~ 100 μm.
As a further improvement on the present invention, the thickness of described quantum dot layer is 10 μm ~ 70 μm.
As a further improvement on the present invention, described protective film is gas barrier material, or the compound of base material and gas barrier material.
As a further improvement on the present invention, described gas barrier material is arranged in protective film outer surface, inside, a place of inner surface or many places.
As a further improvement on the present invention, the bonding between described protective film and quantum dot layer adopt in organic siliconresin, acrylic resin, epoxy resin, polyurethane, UV light-cured resin, ethylene-vinyl acetate copolymer (EVA) one or more.
As a further improvement on the present invention, the solvent of glue of boning between described protective film and quantum dot layer is one or more in benzene class, ketone, alcohols, alkanes, ester class.
As a further improvement on the present invention, the bondline thickness bondd between described protective film and quantum dot layer is 5 μm ~ 50 μm.
As a further improvement on the present invention, the base material of described protective film is one or more in Merlon (PC), PETG (PET), ethylene-vinyl acetate copolymer (EVA), polypropylene (PP), polyvinyl chloride (PVC).
As a further improvement on the present invention, the thickness of described protective film base material is 10 μm ~ 100 μm.
As a further improvement on the present invention, the distributing position of described gas barrier material be that quantum dot layer is inner, quantum dot layer surperficial in a place or many places.
As a further improvement on the present invention, described gas barrier material is the compound of high molecular polymer, inorganic compound, high molecular polymer and inorganic compound.
As a further improvement on the present invention, the gas barrier material of described high molecular polymer type is one or more in epoxy resin, polymethyl methacrylate (PMMA), acrylic resin, UV light-cured resin.
As a further improvement on the present invention, the solvent of the gas barrier material of described high molecular polymer type is one or more in benzene class, ketone, alcohols, alkanes, ester class.
As a further improvement on the present invention, the gas barrier material of described inorganic compound type is silica, silica (SiO
x), Al
2o
3in one or more.
As a further improvement on the present invention, the thickness of described protective film is 1 μm ~ 500 μm.
As a further improvement on the present invention, the thickness of described protective film is 5 μm ~ 100 μm.
As a further improvement on the present invention, the thickness of described protective film is 10 μm ~ 70 μm.
As a further improvement on the present invention, described gas barrier material forms protective film by filming technologies such as spin coating, spraying, flow coat, lifts on quantum dot layer surface.
As a further improvement on the present invention, described gas barrier material forms gas-barrier layer by filming technologies such as spin coating, spraying, flow coat, lifts at substrate surface.
As a further improvement on the present invention, described gas barrier material is 1 × 10 to the transmitance of steam
-6mg/m
2my god ~ 1mg/m
2my god, be preferably 0.1mg/m
2my god ~ 1 × 10
-3mg/m
2my god.
As a further improvement on the present invention, described gas barrier material is 1 × 10 to the transmitance of oxygen
-6mL/m
2my god ~ 1mL/m
2my god, be preferably 0.1mL/m
2my god ~ 1 × 10
-3mg/m
2my god.
As a further improvement on the present invention, described gas barrier material is 1 × 10 to the transmitance of organic amine
-6mg/m
2my god ~ 1mg/m
2my god, be preferably 0.1mg/m
2my god ~ 1 × 10
-3mg/m
2my god.
As a further improvement on the present invention, described gas barrier material is 1 × 10 to the transmitance of alcohols
-6mg/m
2my god ~ 1mg/m
2my god, be preferably 0.1mg/m
2my god ~ 1 × 10
-3mg/m
2my god.
Beneficial effect of the present invention is: the stability that invention increases quantum dot, extends the service life of quantum dot fluorescence film.
Accompanying drawing explanation
For being illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below the accompanying drawing that the description of embodiment or prior art uses is briefly described.Accompanying drawing described below is only some embodiments recorded in the present invention, does not form limitation of the invention.
Fig. 1 is the structural representation of phosphor film layer of the present invention;
Fig. 2 is the structural representation of sandwich construction fluorescent composite thin film in the embodiment of the present invention 1 ~ 6;
Fig. 3 is the structural representation of sandwich construction fluorescent composite thin film in the embodiment of the present invention 7 ~ 10.
Detailed description of the invention
A kind of sandwich construction fluorescent composite thin film containing quantum dot provided by the invention, its outermost layer is protective film, and intermediate layer is quantum dot layer.The all protected rete in two surfaces and side up and down of quantum dot layer covers.
As shown in Figure 1, quantum dot layer 11 comprises green quantum dot 111, red quantum point 112, light diffusion particle 113, filmogen 114.
The preparation method of quantum dot layer is:
At the glue of substrate surface coating containing dot layer material, after glue curing, form quantum dot layer.Embodiment 1 ~ 3 for preparing the concrete grammar of quantum dot layer, in table 1.
The preparation method of table 1 quantum dot layer
As shown in Figure 2, quantum dot fluorescence laminated film comprises quantum dot layer 11 and is positioned at the protective film 12 of quantum dot layer 11 surrounding.Protective film 12 is made up of gas barrier material.Two surface and the equal covering protection retes 12 of side surrounding up and down of quantum dot layer.
The concrete preparation process of protective film 12 is: be dissolved in by gas barrier material in solvent, is made into certain density solution, and this solution is coated quantum dot layer surface in the mode of spin coating, spraying, flow coat, lift, is then cured under certain condition.Obtained quantum dot fluorescence laminated film thus.Embodiment 1 ~ 6 is the concrete grammar of preparation protective film 12, in table 2.
The preparation formula of table 2 protective film 12
As shown in Figure 3, quantum dot fluorescence laminated film comprises quantum dot layer 11 and is positioned at the protective film 13 of quantum dot layer 11 surrounding.Protective film 13 is made up of gas barrier material and base material.Two surface and the equal covering protection retes 13 of side surrounding up and down of quantum dot layer.
The preparation process of protective film 13 is: be coated with one deck gas barrier material by the mode of spin coating, spraying, flow coat, lift at substrate surface, concrete steps are identical with embodiment 1 ~ 6.
The associated methods of protective film 13 and quantum dot layer 11: be coated with one deck glue on the surface in any one of protective film 13; bondline thickness is 5 μm ~ 50 μm; then constant temperature 10 minutes ~ 20 minutes at 70 DEG C ~ 100 DEG C; solvent is volatilized dry, the one side scribbling glue is affixed on quantum dot layer surface (length of protective film and width are all greater than length and the width of quantum dot layer).After stickup completes, make all wide than the quantum dot layer 1mm ~ 1cm in protective film edge.Scribble the protective film (length of second protective film and width and bonding method identical with first) of identical glue another surface mount of quantum dot layer second, the complete protected rete in the front of quantum dot layer and side is covered.Obtained quantum dot fluorescence laminated film thus.Embodiment 7 ~ 10 is the glue formula pasted between protective film 13 and quantum dot layer 11, in table 3.
The glue formula pasted between table 3 protective film 13 and quantum dot layer 11
| Resin types | Solvent | Bondline thickness (μm) | |
| Embodiment 7 | Organic siliconresin | Acetone | 50 |
| Embodiment 8 | Acrylic resin | Ethanol | 10 |
| Embodiment 9 | EVA | Benzene | 5 |
| Embodiment 10 | Polyurethane | Ethyl acetate | 20 |
Claims (9)
1. a long-life quantum dot fluorescence laminated film, is characterized in that, the outermost layer of described quantum dot fluorescence laminated film is protective film, and intermediate layer is quantum dot layer.
2. quantum dot fluorescence laminated film according to claim 1, is characterized in that, described quantum dot layer forms primarily of quantum dot fluorescence material, fluoropolymer resin, light diffusion particle, light stabilizer and antioxidant.
3. quantum dot fluorescence laminated film according to claim 2, is characterized in that, described light stabilizer is one or more in benzophenone and derivative, BTA and derivative thereof, piperidines and derivative thereof; Described antioxidant is one or more in phosphorous acid esters, phenols, monothioester class, thioether, disulphide, mercaptan.
4. quantum dot fluorescence laminated film according to claim 1, is characterized in that, described protective film is gas barrier material, or the compound of base material and gas barrier material.
5. quantum dot fluorescence laminated film according to claim 4, is characterized in that, described gas barrier material is the compound with the organic polymer of gas barrier character, inorganic compound or organic polymer and inorganic compound.
6. quantum dot fluorescence laminated film according to claim 5, is characterized in that, the distributing position of described gas barrier material is that quantum dot layer is inner, quantum dot layer is surperficial, a place in diaphragm substrate surface or many places.
7. quantum dot fluorescence laminated film according to claim 6, is characterized in that, described inorganic compound is silica (SiO
x), Al
2o
3in one or more.
8. quantum dot fluorescence laminated film according to claim 1; wherein; protective film and quantum dot layer are bonded together, and described bonding adopts organic siliconresin, acrylic resin, epoxy resin, polyurethane, UV light-cured resin, one or more in ethylene-vinyl acetate copolymer (EVA).
9. prepare the method as the quantum dot fluorescence laminated film in claim 1-8 as described in any one for one kind; it is characterized in that; comprise the following steps: at the glue of substrate surface coating containing dot layer material; after glue curing; form quantum dot layer, at upper and lower two surface and the equal covered with protective film in side of quantum dot layer.
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| CN201410809497.1A CN104501043A (en) | 2014-12-19 | 2014-12-19 | Long-service-life quantum dot fluorescent composite thin film and preparation method thereof |
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|---|---|---|---|
| CN201410809497.1A CN104501043A (en) | 2014-12-19 | 2014-12-19 | Long-service-life quantum dot fluorescent composite thin film and preparation method thereof |
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