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A kind of preparation method of perovskite quantum dot/polymer composite fluorescent film

A composite fluorescence and polymer technology, applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of large amount of raw materials, cumbersome and complicated processes, low efficiency, etc., and achieve the effect of promoting continuous production and optimizing the effect

Active Publication Date: 2020-08-11
ZHIJING NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, the current light conversion film technology based on perovskite quantum dots generally has problems such as cumbersome and complicated processes, large amount of raw materials, and low efficiency.

Method used

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  • A kind of preparation method of perovskite quantum dot/polymer composite fluorescent film
  • A kind of preparation method of perovskite quantum dot/polymer composite fluorescent film
  • A kind of preparation method of perovskite quantum dot/polymer composite fluorescent film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1CH 3 NH 3 PbBr 3 / Continuous tape casting of PVDF composite luminescent film (1)

[0061] In an environment with a relative humidity 2 0.4mmol, CH 3 NH 3 0.4 mmol of Br (methylamine bromide), 10 g of polymer component PVDF and 0.05 g of organic amine component n-octylamine were dissolved in 100 mL of organic solvent dimethyl sulfoxide to obtain a mixed solution. The mixed solution was processed through the following steps in turn: mechanical stirring for 1 hour, high-speed dispersion for 30 minutes, high-mesh filter to remove impurities, centrifugation to remove air bubbles, and vacuum to further remove air bubbles. Finally, the film-forming solution used in the next stage was obtained and sealed. stand-by.

[0062]Pre-set the temperature of the multi-stage drying oven (the length of each drying oven is 1m) of the tape casting equipment, in order: the first section is 70°C, the second section is 60°C, the third section is 50°C, and the first section is 6...

Embodiment 2

[0066] Example 2CH 3 NH 3 PbBr 3 / Continuous tape casting of PVDF composite luminescent film (2)

[0067] Repeat the experimental procedure of Example 1, change the organic solvent dimethyl sulfoxide 100mL to the mixed solvent dimethyl sulfoxide 60mL / acetone 40mL, and set the speed of the membrane belt entering the drying tunnel to 0.3m / min. The obtained composite luminescent film is translucent green, and the same test method is used to characterize the composite luminescent film. The luminescent wavelength is 535nm, the half-maximum width is 28nm, the fluorescence quantum yield is 74%, and the light transmittance is 79% (550nm- 900nm). Under the same drying conditions, the use of a mixed solvent system can speed up the casting drying speed of the composite luminescent film, shorten the drying time, and improve production efficiency. The fluorescence emission spectrum of the composite luminescent film is as follows figure 2 shown.

Embodiment 3

[0068] Example 3CH 3 NH 3 PbBr 3 / Continuous tape casting of PVDF composite luminescent film (3)

[0069] The experimental procedure of Example 1 was repeated, except that 0.05 g of n-octylamine was not added as an additive. The obtained composite luminescent film is pale yellow, and the same test method is used to characterize the composite luminescent film. The luminescent wavelength is 530nm, the half-maximum width is 31nm, the fluorescence quantum yield is 23%, and the light transmittance is 41% (550nm-900nm ). The addition of organic amine additives can greatly increase the fluorescence quantum yield of the prepared composite film.

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Abstract

The invention provides a preparation method of a perovskite quantum dot / polymer composite fluorescent film. The method comprises the following steps that S1, perovskite raw material ingredients and polymer ingredients are dissolved in an organic solvent to obtain a film forming solution; S2, a substrate material is coated with the film forming solution; S3, the substrate material coated with the film forming solution continuously passes through a plurality of temperature regions to be heated; the perovskite quantum dot / polymer composite fluorescent film is generated. The preparation method provided by the invention has the advantages that a multi-section heating drying mode is used; the fluorescent quality of the quantum dot optical film can be better controlled; the method can be used for continuously and industrially producing the composite fluorescent film; the production flow process can be obviously simplified; the production efficiency is improved; the cost is reduced.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to the field of luminescent composite materials, in particular to a method for preparing a perovskite quantum dot / polymer composite fluorescent film. Background technique [0002] Composite fluorescent films, as a class of light conversion materials with excellent performance, are widely used in solar concentrators and white LEDs. In recent years, quantum dot luminescent materials have been successfully used in LCD backlight modules, which have significantly improved the color gamut level of LCDs, and have shown great advantages in color reproduction. Among them, the most important quantum dot luminescent materials and their application methods include two categories: the first category is the light pipe technology based on QD Vision in the United States, which is mainly based on CdSe quantum dot luminescent materials; the second category is light The conversion film technology...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L27/16C08L1/12C08L33/20C08L1/28C08K5/17C08K3/16C09K11/66C09K11/06
CPCC08J5/18C08J2301/12C08J2301/28C08J2327/16C08J2333/20C08K3/16C08K5/17C08L2201/10C08L2203/16C09K11/06C09K11/665C08L27/16C08L1/12C08L33/20C08L1/288
Inventor 刘瑞扩许静
Owner ZHIJING NANOTECH CO LTD
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