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Inorganic perovskite quantum dot diffusion plate and preparation method thereof

A technology of quantum dots and inorganic calcium, applied in the field of inorganic perovskite quantum dot diffusion plate and its preparation, can solve the problems of occupying quantum dot diffusion plate, large half width, high cost, etc., saving time, manpower and material resources, Good color performance and low energy consumption

Pending Publication Date: 2022-04-22
MINDU INNOVATION LAB +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing quantum dot diffusion plates usually use cadmium-based quantum dot materials, which contain heavy metals, are toxic, and the half width is still too large
The synthesis and purification process of quantum dots is time-consuming, labor-intensive and energy-consuming (repeated heating and cooling), solvent consumption (precipitating agents ethyl acetate, methyl acetate, etc., and good solvents n-octane, n-hexane, cyclohexane, toluene, etc.), occupying The larger cost of the quantum dot diffusion plate

Method used

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  • Inorganic perovskite quantum dot diffusion plate and preparation method thereof
  • Inorganic perovskite quantum dot diffusion plate and preparation method thereof
  • Inorganic perovskite quantum dot diffusion plate and preparation method thereof

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preparation example Construction

[0030] Please refer to figure 1 , the present embodiment also provides a method for preparing an inorganic perovskite quantum dot diffusion plate, comprising the following steps:

[0031] Step S1: weighing the material and granulated particles of high-temperature synthetic perovskite according to the preset mass ratio;

[0032] Step S2: first mix the perovskite material and the granulated particles;

[0033] Step S3: putting the mixed granulated particles and the perovskite mineral material into the feed hopper of the extruder;

[0034] Step S4: the extruder melts, reacts, extrudes, draws the wire, cuts pellets, forms the perovskite quantum dot master batch;

[0035] Step S5: adding the above-mentioned perovskite quantum dot masterbatch to blank particles, and then preparing a diffusion plate of perovskite quantum dots.

Embodiment 1

[0037] This embodiment provides a method for forming a green perovskite quantum dot polystyrene diffusion plate in situ, the steps are as follows:

[0038] (1) Weigh 4.46gPbBr 2 , 1.22g CsCO 3 , 30mL oleic acid, 30mL oleylamine; weigh 724.56g of polystyrene particles.

[0039] (2) Mix the above materials with polystyrene particles evenly, and add them to the feeding funnel of the extruder. The feed temperature is 220°C, and the discharge temperature is 200°C.

[0040] (3) Mixing and extruding with an extruder, water cooling, wire drawing, and pelletizing to obtain green perovskite quantum dot color masterbatch.

[0041] (4) Weigh 62.5g of silica diffusion particles, 187.5g of green perovskite quantum dot color masterbatch, and 1000g of polystyrene particles

[0042] (5) Mix the particles weighed in (4) and put them into the feeding funnel of the extruder. The feeding temperature is 220°C, and the discharging temperature is 200°C. After cooling, the green perovskite quantu...

Embodiment 2

[0044] This embodiment provides a method for forming red perovskite quantum dot polystyrene diffusion plate in situ, the steps are as follows:

[0045] (1) Weigh 3.69gPbI 2 , 1.46gPbBr 2 , 1.22g CsCO 3 , 30mL oleic acid, 30mL oleylamine; weigh 724.56g of polystyrene particles.

[0046] (2) Mix the above materials with polystyrene particles evenly, and add them to the feeding funnel of the extruder. The feed temperature is 220°C, and the discharge temperature is 200°C.

[0047] (3) Mixing and extruding with an extruder, water cooling, wire drawing, and pelletizing to obtain red perovskite quantum dot masterbatch.

[0048] (4) Weigh 62.5g silica diffusion particles, 187.5 red perovskite quantum dot masterbatch, 1000g polystyrene particles

[0049] (5) Mix the particles weighed in (4) and put them into the feeding funnel of the extruder. The feeding temperature is 220°C, and the discharging temperature is 200°C. After cooling, the red perovskite quantum dot diffusion plate ...

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Abstract

The invention relates to an inorganic perovskite quantum dot diffusion plate and a preparation method thereof. The inorganic perovskite quantum dot diffusion plate comprises inorganic perovskite quantum dots, diffusion particles, a protective additive and a matrix material, the proportion of the inorganic perovskite quantum dots is 0.1-5 wt%, and the proportion of the diffusion particles is 1-20 wt%. The inorganic perovskite quantum dots are synchronously generated in the granulation process, the independent quantum dot synthesis step and purification process are avoided, time, manpower and material resources are saved, meanwhile, repeated heating and cooling are avoided, energy consumption is reduced, and the cost of the quantum dot diffusion plate can be further remarkably reduced.

Description

technical field [0001] The invention relates to the field of quantum dot preparation, in particular to an inorganic perovskite quantum dot diffusion plate and a preparation method thereof. Background technique [0002] Quantum dots have the characteristics of adjustable wavelength, high color purity, and high fluorescence efficiency. Applying them to the quantum dot diffusion plate of the LCD backlight module can realize light conversion and light uniformity at the same time, which is expected to improve the light output efficiency of the LCD backlight module. . In addition, the quantum dot diffusion plate can be produced by using the existing mature diffusion plate manufacturing process, which can reduce the application cost of quantum dot technology in liquid crystal displays. However, the existing quantum dot diffusion plates usually use cadmium-based quantum dot materials, which contain heavy metals, are toxic, and have a relatively large half-width. The synthesis and ...

Claims

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Application Information

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IPC IPC(8): G02B5/02C09K11/66C09K11/02B82Y20/00B82Y40/00
CPCG02B5/0242G02B5/0268C09K11/665C09K11/025B82Y20/00B82Y40/00
Inventor 杨旭鹏陈馨媛李阳游宝贵谢洪兴叶芸郭太良
Owner MINDU INNOVATION LAB
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