CN105954914B - A kind of preparation method of liquid crystal display panel color blocking layer - Google Patents
A kind of preparation method of liquid crystal display panel color blocking layer Download PDFInfo
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- CN105954914B CN105954914B CN201610459857.9A CN201610459857A CN105954914B CN 105954914 B CN105954914 B CN 105954914B CN 201610459857 A CN201610459857 A CN 201610459857A CN 105954914 B CN105954914 B CN 105954914B
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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
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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
- G02F1/133516—Methods for their manufacture, e.g. printing, electro-deposition or photolithography
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Abstract
The present invention provides a kind of preparation method of liquid crystal display panel color blocking layer, comprising the following steps: prepares the red quantum dot, the yellow quantum dot and the green quantum dot respectively；It handles the red quantum dot, the yellow quantum dot to obtain the solution for the white quantum dot that three mixes by mixed dissolution and centrifugal purification with the green quantum dot；By the red quantum dot, the yellow quantum dot, the green quantum dot and the white quantum dot solution, processing forms red photosensitive dispersion liquid, the photosensitive dispersion liquid of yellow, the photosensitive dispersion liquid of green and the photosensitive dispersion liquid of white respectively；The photosensitive dispersion liquid of the red, the photosensitive dispersion liquid of the yellow, the photosensitive dispersion liquid of green are coated on the glass substrate by preset rules, the liquid crystal display panel color blocking layer is formed by the manufacture craft for including exposure, development.The present invention effectively increases brightness, colour gamut and the color representation power of liquid crystal display.
Description
[technical field]
The present invention relates to technology of quantum dots field, in particular to a kind of preparation method of liquid crystal display panel color blocking layer.
[background technique]
In general, each pixel on liquid crystal display panel is by corresponding to three sons of three primary colors (red, green, blue)
Pixel unit composition.Show what the liquid crystal display of a point declined there are the utilization efficiency of light based on three color of red, green, blue
Problem.1/3 or so of incident light on it is only penetrated for the optical filter of corresponding R, G, B pixel, therefore, whole light
Efficiency can decline.In order to improve optical efficiency, have been developed that four color pixels are additionally added that is, other than tri- sub-pixels of R, G, B
White (W) sub-pixel can effectively improve the benefit of transmitted light since the light transmission of white sub-pixels is 100%
With rate, to improve the brightness of display panel.Since the color of nature is made of unsaturated white light, saturation
RGB three primary colors only account for the ratio of very little, it is most of so when carrying out full-color display using RGB three primary colors light emitting sub-pixel
Pixel requires to be complex as nonsaturated color by RGB three primary colors to complete the reproduction to natural image, it is therefore desirable to RGB tri- hairs
Sub-pixels work at the same time, and there are certain energy losses.
By multiprimary color display device, expends energy without more, can be achieved with broader colour gamut.In tri- kinds of colors of RGB
On the basis of increase other colors, such as adding W improves brightness and color reproduction range, under same consumption energy, RGBW skill
Art can realize brighter white, improve about 20% than traditional RGB three primary colors；It is achievable more extensive out to add yellow (Y)
Colour gamut more vivo reproduces yellow, golden these are difficult to the color of true reappearance by tradition RGB trichromatic technique.Now
Improve the color representation power of LCD TV, improve the main method of color saturation first is that improve backlight illumination.But due to warp
The backlight for crossing traditional RGB color filter membrane is most of by RGB absorption (about 66% loss), and only very little part light is aobvious through RGB
Show color, therefore to the utilization rate of light extremely low (usual backlight transmitance is lower than 5%), therefore improves backlight illumination and will cause largely
Energy loss.In addition, the transmission peaks of currently used RGB organic pigment are relatively wide, colour saturation and purity are limited, so that liquid crystal
Display is difficult to realize wider array of colour gamut, and color representation power is extremely restricted.
Quantum dot can be launched when by electrically or optically stimulating strong by the former molecular nanocrystal of finite number
Fluorescence, and emission peak half-peak breadth is extremely narrow, and excitation purity is high, composition material and diameter of the emission peak wavelength by quantum dot, shape
Shape is determined.Therefore, it if substituting tradition RGB pigment with autonomous luminescent quantum dot in chromatic photoresist material, can greatly improve
The brightness and color representation power of display screen, can also reduce energy consumption.However the prior art is when preparing more primary colors quantum dots, method
More complicated, cost is relatively high, and include cadmium element inside, and cadmium element can reduce the brightness and color representation of display screen
Power.The above problem is urgently to be resolved.
[summary of the invention]
The purpose of the present invention is to provide a kind of preparation methods of liquid crystal display panel color blocking layer, to solve in the prior art, system
When standby more primary colors quantum dots, method is more complicated, and cost is relatively high, and include cadmium element inside, and cadmium element can reduce
The problem of brightness and color representation power of display screen.
Technical scheme is as follows:
A kind of preparation method of liquid crystal display panel color blocking layer, the making material of the liquid crystal display panel color blocking layer are more primary colors
ZnCuInS/ZnS quantum dot, more primary colors ZnCuInS/ZnS quantum dots are included under blue light illumination emits feux rouges, Huang respectively
Light, the red quantum dot of green light and white light, yellow quantum dot, green quantum dot and white quantum dot, the preparation method include
Following steps:
The red quantum dot, the yellow quantum dot and the green quantum dot are prepared respectively；
The red quantum dot, the yellow quantum dot and the green quantum dot are passed through into mixed dissolution and centrifugal purification
Processing obtains the solution of the white quantum dot of three's mixing；
By the red quantum dot, the yellow quantum dot, the green quantum dot and the white quantum dot solution,
Processing forms red photosensitive dispersion liquid, the photosensitive dispersion liquid of yellow, the photosensitive dispersion liquid of green and the photosensitive dispersion liquid of white respectively；
By the photosensitive dispersion liquid of the red, the photosensitive dispersion liquid of the yellow, the photosensitive dispersion liquid of the green and the white
Photosensitive dispersion liquid is coated on the glass substrate by preset rules, by including the manufacture craft of exposure, development, forms the liquid crystal
Panel color blocking layer.
Preferably, the red quantum dot, the yellow quantum dot and the green quantum dot are prepared respectively, it is specific to wrap
It includes:
By Cu precursor solution, In precursor solution, Zn precursor solution, lauryl mercaptan solution and octadecene solution by pre-
If three-necked bottle is added in molar ratio, it is heated to 230 °~250 ° under argon atmosphere, separately injects the octadecene solution for dissolving sulphur powder
The three-necked bottle keeps 30min in the range of temperature is 230 °~250 °, and ZnCuInS nucleus solution is made；
Reaction temperature is increased 10 °, and the Zn presoma that the first preset quantity is added to the ZnCuInS nucleus solution is molten
Liquid, and reaction 15min is carried out, to form the solution of the red quantum dot；
The solution for taking out the red quantum dot of one third is saved, to the molten of the remaining red quantum dot
The Zn precursor solution of the second preset quantity is added in liquid, and carries out reaction 15min, to form the solution of the yellow quantum dot；
The solution for taking out the yellow quantum dot of half is saved, to the molten of the remaining yellow quantum dot
The Zn precursor solution of third preset quantity is added in liquid, and carries out reaction 15min, to form the solution of the green quantum dot.
Preferably, by Cu precursor solution, In precursor solution, Zn precursor solution, lauryl mercaptan solution and octadecylene
Solution is added before three-necked bottle, further includes:
The Cu precursor solution, the In precursor solution and the Zn precursor solution are prepared respectively.
Preferably, the solution of the green quantum dot is formed, later further include:
Respectively by the solution of the red quantum dot, the solution of the solution of the yellow quantum dot and the green quantum dot
Temperature be reduced to 60 °, and carry out centrifugal purification processing after being separately added into toluene and methanol, obtain the red quantum dot, institute
State yellow quantum dot and the green quantum dot.
Preferably, by the red quantum dot, the yellow quantum dot and the green quantum dot by mixed dissolution and
Centrifugal purification processing obtains the solution of the white quantum dot of three's mixing, specifically includes:
Weighing is dried in the green quantum dot, the yellow quantum dot and the red quantum dot respectively, and molten
In toluene；
According to 1: 1: 1 mass ratio by the red quantum dot after dry weighing, the yellow quantum dot with it is described green
Colo(u)r specification sub- point is mixed；
The methanol equal with the green volume of quantum dot with the red quantum dot, the yellow quantum dot is added,
Centrifugal treating is carried out, mixing quantum dot precipitating is obtained；
Toluene is added to precipitate to the mixing quantum dot, is ultrasonically treated, the solution of the white quantum dot is obtained.
Preferably, by the red quantum dot, the yellow quantum dot, the green quantum dot and the white quantum dot
Solution, processing forms the photosensitive dispersion liquid of green, the photosensitive dispersion liquid of yellow, red photosensitive dispersion liquid and the photosensitive dispersion of white respectively
Liquid specifically includes:
Be separately added into chloroform to the red quantum dot, the yellow quantum dot, the green quantum dot with it is described
The solution of white quantum dot, makes it dissolve, and is separately added into Thioglycolic acid again later as dispersing agent, makes its stable dispersion；
Polystyrene resin, maleic anhydride monomer, methyl benzoylformate photoinitiator and lead stearate heat are added respectively
Enter the red quantum dot to stable dispersion, the yellow quantum dot, the green quantum dot and the white quantum dot
Solution is reacted, and formed the photosensitive dispersion liquid of the red, the photosensitive dispersion liquid of the yellow, the photosensitive dispersion liquid of green with
The photosensitive dispersion liquid of white.
Preferably, the Cu element of the Cu precursor solution, the In element of the In precursor solution and the Zn forerunner
Molar ratio between the Zn element of liquid solution is 5:5: 3, and the volume of the lauryl mercaptan is the Cu precursor solution, the In
The one third of the volume summation of precursor solution and the Zn precursor solution, the volume of the octadecene solution are the Cu
The volume summation of precursor solution, the In precursor solution and the Zn precursor solution.
Preferably, the molar ratio of Cu element and Zn element is 5:6, Cu in the yellow quantum dot in the red quantum dot
The molar ratio of element and Zn element is 5: 9, and the molar ratio of Cu element and Zn element is 5: 12 in the green quantum dot.
Preferably, in the Zn precursor solution being added every time, the molal quantity of Zn element is Cu in the Cu precursor solution
0.6 times of the total mole number of element.
Preferably, the emission wavelength of the green quantum dot is 540nm, and the emission wavelength of the yellow quantum dot is
580nm, the emission wavelength of the red quantum dot are 640nm, and the light color of the backlight transmitting of the liquid crystal display panel is indigo plant
Light.Beneficial effects of the present invention:
The preparation method of a kind of liquid crystal display panel color blocking layer of the invention, by using the red quantum dot from main light emission, Huang
The making material of color quantum dot, green quantum dot and white quantum dot as liquid crystal display panel color blocking layer, effectively increases liquid crystal
Show brightness, colour gamut and the color representation power of device.In addition, red quantum dot of the invention, yellow quantum dot, green quantum dot and white
Color quantum dot is cadmium-free quantum dots, can effectively reduce heavy metal toxicity and environmental pollution.
[Detailed description of the invention]
Fig. 1 is the flow chart of one of the embodiment of the present invention preparation method of liquid crystal display panel color blocking layer；
Fig. 2 is in the color blocking layer of the liquid crystal display panel in the embodiment of the present invention by red photosensitive dispersion liquid, the photosensitive dispersion of green
The permutation and combination method of four sub-pixels units of liquid, the photosensitive dispersion liquid of white and Blue backlight composition；
Fig. 3 is the photosensitive dispersion liquid of red, the photosensitive dispersion liquid of yellow, the photosensitive dispersion liquid of green and the blue of the embodiment of the present invention
Another permutation and combination method of four sub-pixels units of backlight composition；
Fig. 4 is the photosensitive dispersion liquid of red, the photosensitive dispersion liquid of yellow, the photosensitive dispersion liquid of green, white of the embodiment of the present invention
The permutation and combination method of multicolored sub-pixel unit of photosensitive dispersion liquid and Blue backlight composition.
[specific embodiment]
The explanation of following embodiment is to can be used to the particular implementation of implementation to illustrate the present invention with reference to additional schema
Example.The direction term that the present invention is previously mentioned, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outside", " side "
Deng being only the direction with reference to annexed drawings.Therefore, the direction term used be to illustrate and understand the present invention, rather than to
The limitation present invention.The similar unit of structure is to be given the same reference numerals in the figure.
Embodiment one
Quantum dot (quantum dots, QDs) is a kind of three-dimensional cluster, and size is received in nanometer scale so being otherwise known as
Meter Jing, nano dot.QDs material is one and is related to the multi-disciplinary crossing domain such as physics, material, nanotechnology.Due to the spy of QDs
Different structure causes it with skin effect, quantum size effect, Dielectric confinement effect and macro quanta tunnel effect, so as to cause
Unique physicochemical properties and the characteristics of luminescence, these are all totally different from the property of identical macroscopical block materials.
On the other hand, now widely used liquid-crystal display (LCD), light-emitting
Diode (LED) is although display equipment has the progress broken through in large scale, high-resolution, due to its luminescent material
Spectrum defect, there are also very big challenges [5-10] in image quality and color fidelity for these display materials.These are solved to choose
War needs better luminescent material, and the appearance of QDs luminescent material provides an effective approach for the solution of these problems.To the greatest extent
The unique optics and physical property of pipe QDs is found very early, but the application in terms of display material is recently
Grow up.It is known that QDs in visible color emission spectrum its emit light be it is continuously adjustable, this is other luminescent materials
Incomparable；And the QDs of different wave length can be excited by same excitation wave, as long as thus with a kind of indigo plant in display material
Color backlight can excite the light in all limits of visible spectrum.The researcher of Samsung has prepared in the world first
The panchromatic QDs display of platform, it is more bright-coloured, more cheaper and more save than color in the display on mobile phone and MP3 is commonly used
Energy.Exactly under the inspiration of these achievements, main display manufacturer and research institution expand QDs one after another and show in the world
The research work of device, various technological challenges gradually solve.
Referring to FIG. 1, Fig. 1 is a kind of flow chart of the preparation method of liquid crystal display panel color blocking layer of the present embodiment, it can from Fig. 1
To see, a kind of preparation method of liquid crystal display panel color blocking layer of the invention, comprising the following steps:
Step S101: red quantum dot, yellow quantum dot and green quantum dot are prepared respectively.
In this step, the making material of the liquid crystal display panel color blocking layer is the ZnCuInS/ZnS quantum dot of more primary colors, institute
Stating more primary colors ZnCuInS/ZnS quantum dots includes the amount of red for emitting feux rouges, yellow light, green light and white light respectively under blue light illumination
Sub- point, yellow quantum dot, green quantum dot and white quantum dot.
The red quantum dot, the yellow quantum dot and the green quantum dot are prepared respectively, are specifically included and are walked
It is rapid:
First, the Cu precursor solution, the In precursor solution and the Zn precursor solution are prepared respectively.
Second, Cu precursor solution, In precursor solution, Zn precursor solution, lauryl mercaptan solution and octadecylene is molten
Liquid presses default molar ratio and three-necked bottle is added, and 230 °~250 ° are heated under argon atmosphere, separately that the octadecylene for dissolving sulphur powder is molten
Liquid injects the three-necked bottle, keeps 30min in the range of temperature is 230 °~250 °, and ZnCuInS nucleus solution is made.
It preferably, will be before 1mL0.25mol/LCu presoma, 1mL0.25mol/LIn presoma, 0.25mL0.6mol/LZn
It drives body, 1mL lauryl mercaptan and 3mL octadecylene to be fitted into three-necked bottle, is stirred under argon atmosphere and be heated to 230 DEG C, later will
The octadecene solution that 0.35mL0.4mol/L dissolves sulphur powder injects three-necked bottle, keeps temperature 30min, forms ZnCuInS nucleus.
Third, by reaction temperature increase 10 °, and to the ZnCuInS nucleus solution be added the first preset quantity Zn before
Liquid solution is driven, and carries out reaction 15min, to form the solution of the red quantum dot.
Preferably, reaction temperature is increased to 240 DEG C, 0.25mL0.6mol/L Zn presoma is added in reaction solution,
ZnCuInS nucleus is set to carry out the cladding of ZnS shell.
4th, the solution for taking out the red quantum dot of one third is saved, to the remaining red quantum
The Zn precursor solution of the second preset quantity is added in the solution of point, and carries out reaction 15min, to form the yellow quantum dot
Solution.
5th, the solution for taking out the yellow quantum dot of half is saved, to the remaining yellow quantum
The Zn precursor solution of third preset quantity is added in the solution of point, and carries out reaction 15min, to form the green quantum dot
Solution.
6th, respectively by the solution of the red quantum dot, the solution and the green quantum dot of the yellow quantum dot
The temperature of solution be reduced to 60 °, and carry out centrifugal purification processing after toluene and methanol is added, eccentricity is preferably 3000r/s,
Centrifugal purification is at least 3 times, obtains the red quantum dot, the yellow quantum dot and the green quantum dot.
The present invention is that different amounts of Zn presoma is added by 3 times, to control the molar ratio of Cu element Yu Zn element, is come
Synthesis emits feux rouges (wavelength 540nm), yellow light (wavelength 580nm) and green light (wavelength 640nm) under blue light illumination
ZnCuInS/ZnS quantum dot, wherein when the Cu element of ZnCuInS/ZnS quantum dot and the molar ratio of Zn element are respectively 5: 6,
When 5: 9,5: 12, feux rouges, yellow light and green light are shown respectively under blue light illumination.
Step S102: the red quantum dot, the yellow quantum dot and the green quantum prepared by step S101
Point handles to obtain the solution of the white quantum dot of three's mixing by mixed dissolution and centrifugal purification.
In this step, it specifically includes:
First, weighing is dried in the green quantum dot, the yellow quantum dot and the red quantum dot respectively,
And it is dissolved in the toluene for being dissolved in 3mL respectively.
Second, the red quantum dot, the yellow quantum dot and institute after drying is weighed according to 1: 1: 1 mass ratio
Green quantum dot is stated to be mixed.
Third is added equal with the green volume of quantum dot with the red quantum dot, the yellow quantum dot
Methanol carries out centrifugal treating, and eccentricity is preferably 3000r/s, obtains mixing quantum dot precipitating.
4th, toluene is added and is precipitated to the mixing quantum dot, is ultrasonically treated, the molten of the white quantum dot is obtained
Liquid.The solution of the white quantum dot is comprising red quantum dot, yellow prodigal point and each monochromatic quantum dot of green quantum dot
Mixed solution, and go out for blue light excitation-emission the quantum dot solution of white light.
Step S103: by the red quantum dot, the yellow quantum dot, the green quantum dot and the white quantum
The solution of point, processing forms red photosensitive dispersion liquid, the photosensitive dispersion liquid of yellow, the photosensitive dispersion liquid of green and photosensitive point of white respectively
Dispersion liquid.
In this step, it specifically includes:
First, be separately added into chloroform to the red quantum dot, the yellow quantum dot, the green quantum dot with
The solution of the white quantum dot, makes it dissolve, is separately added into Thioglycolic acid again later as dispersing agent, makes its stable dispersion.
Second, respectively by polystyrene resin, maleic anhydride monomer, methyl benzoylformate photoinitiator and lead stearate
Heat is added to the red quantum dot, the yellow quantum dot, the green quantum dot and the white quantum of stable dispersion
The solution of point is reacted, and forms the photosensitive dispersion liquid of the red, the photosensitive dispersion liquid of the yellow, the photosensitive dispersion of green
Liquid and the photosensitive dispersion liquid of white.
Step S104: by the photosensitive dispersion liquid of the red, the photosensitive dispersion liquid of the yellow, the photosensitive dispersion liquid of the green and
The photosensitive dispersion liquid of white is coated on the glass substrate by preset rules, is formed by the manufacture craft for including exposure, development
The liquid crystal display panel color blocking layer.
In this step, it specifically includes:
Obtaining the photosensitive dispersion liquid of the red, the photosensitive dispersion liquid of the yellow, the photosensitive dispersion liquid of the green and described
One of after the photosensitive dispersion liquid of white, be coated on the base glass plate with black matrix" or spray four kinds of photosensitive dispersion liquids,
Solvent is removed by prebake conditions, unreacted photosensitive quantum dots layer is obtained, is then coated photoresist, prebake conditions, exposure (photoresist
Hirschfeld-Klinger reaction occurs with photosensitive quantum dots layer), development etc. process flows, remove extra photoresist and photosensitive quantum dots layer, then
It is toasted, obtains the corresponding single quantum dot pixel region with photoresist layer protection.Repeat five times this patterned
Multicolored quantum stippling film can be obtained in journey.
Please refer to Fig. 2~4, Fig. 2 be in the color blocking layer of the liquid crystal display panel in the embodiment of the present invention by red photosensitive dispersion liquid,
The permutation and combination method of four sub-pixels units of the photosensitive dispersion liquid of green, the photosensitive dispersion liquid of white and Blue backlight composition.Fig. 3
For the photosensitive dispersion liquid of red of the embodiment of the present invention, the photosensitive dispersion liquid of yellow, the photosensitive dispersion liquid of green and Blue backlight composition
Another permutation and combination method of four sub-pixels units.Fig. 4 is the photosensitive dispersion liquid of red of the embodiment of the present invention, photosensitive point of yellow
The permutation and combination side for multicolored sub-pixel unit that dispersion liquid, the photosensitive dispersion liquid of green, the photosensitive dispersion liquid of white and Blue backlight form
Formula.
In the present embodiment, the Cu element of the Cu precursor solution, the In precursor solution In element with it is described
Molar ratio between the Zn element of Zn precursor solution is 5: 5: 3, the volume of the lauryl mercaptan be the Cu precursor solution,
The one third of the volume summation of the In precursor solution and the Zn precursor solution, the volume of the octadecene solution are
The volume summation of the Cu precursor solution, the In precursor solution and the Zn precursor solution.
In the present embodiment, the molar ratio of Cu element and Zn element is 5: 6 in the red quantum dot, the yellow quantum
The molar ratio of Cu element and Zn element is 5: 9 in point, and the molar ratio of Cu element and Zn element is 5: 12 in the green quantum dot.
In the present embodiment, it is added in Zn precursor solution every time, the molal quantity of Zn element is the Cu precursor solution
0.6 times of the total mole number of middle Cu element.
In the present embodiment, the emission wavelength of the green quantum dot is 540nm, the emission wavelength of the yellow quantum dot
For 580nm, the emission wavelength of the red quantum dot is 640nm, and the light color of the backlight transmitting of the liquid crystal display panel is
Blue light.
The preparation method of a kind of liquid crystal display panel color blocking layer of the invention, by using the red quantum dot from main light emission, Huang
The making material of color quantum dot, green quantum dot and white quantum dot as liquid crystal display panel color blocking layer, effectively increases liquid crystal
Show brightness, colour gamut and the color representation power of device.In addition, red quantum dot of the invention, yellow quantum dot, green quantum dot and white
Color quantum dot is cadmium-free quantum dots, can effectively reduce heavy metal toxicity and environmental pollution.
In conclusion although the present invention has been disclosed above in the preferred embodiment, but above preferred embodiment is not to limit
The system present invention, those skilled in the art can make various changes and profit without departing from the spirit and scope of the present invention
Decorations, therefore protection scope of the present invention subjects to the scope of the claims.
Claims (10)
1. a kind of preparation method of liquid crystal display panel color blocking layer, the making material of the liquid crystal display panel color blocking layer is more primary colors
ZnCuInS/ZnS quantum dot, more primary colors ZnCuInS/ZnS quantum dots are core-shell structure, and ZnCuInS is nucleus, and ZnS is
Shell, more primary colors ZnCuInS/ZnS quantum dots include emitting feux rouges, yellow light, green light and white light respectively under blue light illumination
Red quantum dot, yellow quantum dot, green quantum dot and white quantum dot, which is characterized in that the preparation method includes following
Step:
The red quantum dot, the yellow quantum dot and the green quantum dot are prepared respectively；
The red quantum dot, the yellow quantum dot and the green quantum dot are passed through at mixed dissolution and centrifugal purification
Reason obtains the solution of the white quantum dot of three's mixing；
By the red quantum dot, the yellow quantum dot, the green quantum dot and the white quantum dot solution, respectively
Processing forms red photosensitive dispersion liquid, the photosensitive dispersion liquid of yellow, the photosensitive dispersion liquid of green and the photosensitive dispersion liquid of white；
The photosensitive dispersion liquid of the red, the photosensitive dispersion liquid of the yellow, the photosensitive dispersion liquid of the green and the white is photosensitive
Dispersion liquid is coated on the glass substrate by preset rules, by including the manufacture craft of exposure, development, forms the liquid crystal display panel
Color blocking layer.
2. preparation method according to claim 1, which is characterized in that prepare the red quantum dot, the yellow respectively
Quantum dot and the green quantum dot, specifically include:
Cu precursor solution, In precursor solution, Zn precursor solution, lauryl mercaptan solution and octadecene solution are rubbed by default
You are heated to 230 °~250 ° under argon atmosphere, will separately dissolve described in the octadecene solution injection of sulphur powder than three-necked bottle is added
Three-necked bottle keeps 30min in the range of temperature is 230 °~250 °, and ZnCuInS nucleus solution is made；
Reaction temperature is increased 10 °, and the Zn precursor solution of the first preset quantity is added to the ZnCuInS nucleus solution,
And reaction 15min is carried out, to form the solution of the red quantum dot；
The solution for taking out the red quantum dot of one third is saved, and is added to the solution of the remaining red quantum dot
Enter the Zn precursor solution of the second preset quantity, and carry out reaction 15min, to form the solution of the yellow quantum dot；
The solution for taking out the yellow quantum dot of half is saved, and is added to the solution of the remaining yellow quantum dot
Enter the Zn precursor solution of third preset quantity, and carry out reaction 15min, to form the solution of the green quantum dot.
3. preparation method according to claim 2, which is characterized in that before Cu precursor solution, In precursor solution, Zn
Liquid solution, lauryl mercaptan solution and octadecene solution is driven to be added before three-necked bottle, further includes:
The Cu precursor solution, the In precursor solution and the Zn precursor solution are prepared respectively.
4. preparation method according to claim 2, which is characterized in that form the solution of the green quantum dot, later also
Include:
Respectively by the temperature of the solution of the solution of the red quantum dot, the solution of the yellow quantum dot and the green quantum dot
Degree is reduced to 60 °, and carries out centrifugal purification processing after being separately added into toluene and methanol, obtains the red quantum dot, the Huang
Color quantum dot and the green quantum dot.
5. the preparation method according to claim 4, which is characterized in that by the red quantum dot, the yellow quantum dot
It is handled with the green quantum dot by mixed dissolution and centrifugal purification, obtains the molten of the white quantum dot of three's mixing
Liquid specifically includes:
Weighing is dried in the green quantum dot, the yellow quantum dot and the red quantum dot respectively, and is dissolved in first
In benzene；
The red quantum dot, the yellow quantum dot and the green after dry weighing are measured according to 1: 1: 1 mass ratio
Son point is mixed；
The methanol equal with the green volume of quantum dot with the red quantum dot, the yellow quantum dot is added, carries out
Centrifugal treating obtains mixing quantum dot precipitating；
Toluene is added to precipitate to the mixing quantum dot, is ultrasonically treated, the solution of the white quantum dot is obtained.
6. preparation method according to claim 2, which is characterized in that by the red quantum dot, the yellow quantum dot,
The solution of the green quantum dot and the white quantum dot, processing forms the photosensitive dispersion liquid of green, the photosensitive dispersion of yellow respectively
Liquid, red photosensitive dispersion liquid and the photosensitive dispersion liquid of white, specifically include:
Chloroform is separately added into the red quantum dot, the yellow quantum dot, the green quantum dot and the white
The solution of quantum dot, makes it dissolve, and is separately added into Thioglycolic acid again later as dispersing agent, makes its stable dispersion；
Polystyrene resin, maleic anhydride monomer, methyl benzoylformate photoinitiator and lead stearate heat are added to respectively
The red quantum dot of stable dispersion, the yellow quantum dot, the green quantum dot and the white quantum dot solution
Reacted, and formed the photosensitive dispersion liquid of the red, the photosensitive dispersion liquid of the yellow, the photosensitive dispersion liquid of green with it is described
The photosensitive dispersion liquid of white.
7. preparation method according to claim 2, which is characterized in that Cu element, the In of the Cu precursor solution
Molar ratio between the In element of precursor solution and the Zn element of the Zn precursor solution is 5: 5: 3, the lauryl mercaptan
Volume be the Cu precursor solution, the In precursor solution and the Zn precursor solution volume summation three/
One, the volume of the octadecene solution is the Cu precursor solution, the In precursor solution and the Zn precursor solution
Volume summation.
8. the preparation method according to claim 4, which is characterized in that Cu element and Zn element in the red quantum dot
Molar ratio is 5: 6, and the molar ratio of Cu element and Zn element is 5: 9 in the yellow quantum dot, Cu member in the green quantum dot
The molar ratio of element and Zn element is 5: 12.
9. preparation method according to claim 2, which is characterized in that in the Zn precursor solution being added every time, Zn element
Molal quantity be 0.6 times of total mole number of Cu element in the Cu precursor solution.
10. preparation method according to claim 2, which is characterized in that it is described green quantum dot emission wavelength be
540nm, the emission wavelength of the yellow quantum dot are 580nm, and the emission wavelength of the red quantum dot is 640nm, the liquid
The light color of the backlight transmitting of crystal panel is blue light.
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