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Quantum dot ink and quantum dot color film

A quantum dot and ink technology, applied in the field of quantum dot ink and quantum dot color film, can solve the problems of poor dispersion of light diffusion particles, affect the printing effect, and unsmooth printing, and achieve good flatness, reduce adverse effects, and smooth process Effect

Active Publication Date: 2022-02-01
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersibility of light diffusing particles in the ink system is poor, and they are easy to aggregate and settle, which affects the printing effect
In addition, the quantum dot inks in the prior art often have poor film-forming properties, the printing is not smooth, and the nozzles are easily blocked

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The present embodiment provides a quantum dot ink, comprising: 40wt% red light CdSe / ZnS quantum dots, 30wt% cyclohexyl acetate (boiling point is 173.5°C), 24wt% tetralin (boiling point is 207.2°C), 2wt% polymethyl methacrylate particles and 4wt% polyoxyethylene monooleate.

[0037] The above ink can be placed for 150 days and still remain stable without agglomeration or precipitation. Using the above-mentioned quantum dot ink for inkjet printing, the process is smooth, the film is formed uniformly, and a smooth quantum dot color film is obtained.

[0038] The luminous performance of the quantum dot color film was tested, and the initial luminance of the blue backlight used was 1000cd / m 2 , the results of the blue light absorption rate, luminance, and external quantum yield (EQE) of the quantum dot color film are shown in Table 1.

Embodiment 2

[0040] The present embodiment provides a kind of quantum dot ink, comprises: the red light InP / ZnS quantum dot of 35.5wt%, the methyl cyclohexyl acetate (boiling point is 182 ℃) of 20wt%, the xylene (boiling point is 140 ℃) of 40wt% ), 2.5wt% of polymethyl methacrylate particles and 2wt% of polyoxyethylene cetyl ether.

[0041] The above ink can be placed for 150 days and still remain stable without agglomeration or precipitation. Using the above-mentioned quantum dot ink for inkjet printing, the process is smooth, the film is formed uniformly, and a smooth quantum dot color film is obtained.

[0042] The luminous performance of the quantum dot color film was tested, and the initial luminance of the blue backlight used was 1000cd / m 2 , the results of the blue light absorption rate, luminance, and external quantum yield (EQE) of the quantum dot color film are shown in Table 1.

Embodiment 3

[0044] The present embodiment provides a kind of quantum dot ink, comprises: the green light CdSeS quantum dot of 30wt%, the cyclohexyl acrylate (boiling point is 184 ℃) of 25wt%, the methylnaphthalene of 30wt% (boiling point is 245 ℃), 6wt% Polycarbonate particles and 9wt% polyoxyethylene monostearate.

[0045] The above ink can be placed for 150 days and still remain stable without agglomeration or precipitation. Using the above-mentioned quantum dot ink for inkjet printing, the process is smooth, the film is formed uniformly, and a smooth quantum dot color film is obtained.

[0046] The luminous performance of the quantum dot color film was tested, and the initial luminance of the blue backlight used was 1000cd / m 2 , the results of the blue light absorption rate, luminance, and external quantum yield (EQE) of the quantum dot color film are shown in Table 1.

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Abstract

The application discloses a quantum dot ink and a quantum dot color film. Wherein, the quantum dot ink includes quantum dots, light diffusion particles and a solvent, and the solvent includes at least one ester solvent with a ring structure and at least one aromatic solvent. The quantum dot ink of the present application uses esters with a ring structure and aromatic hydrocarbons as a mixed solvent, and the content of the two is controlled within a certain ratio range, which effectively improves the dispersion stability of the light-diffusing particles in the ink. When the ink is used for inkjet printing, the process is smooth and the nozzles are not blocked, and the obtained quantum dot color film has good flatness, uniform film formation and high light output brightness.

Description

technical field [0001] The application belongs to the field of quantum dot luminescence technology, and in particular relates to a quantum dot ink and a quantum dot color film. Background technique [0002] Quantum dot materials have the advantages of high color purity, adjustable luminous color with size, and high light conversion efficiency. When quantum dots are used as the light conversion material of the color filter of an LCD (Liquid crystal display, liquid crystal display), the color gamut of the display and the utilization efficiency of the backlight can be significantly improved. At present, the preparation of quantum dot color film (QDCF) mainly uses quantum dot photoresist, but this method requires high heat resistance and acid and alkali resistance of the quantum dot material itself, and the curing process of photoresist will affect the quantum dot itself. The luminous efficiency will be adversely affected, and the photolithography method will consume a large am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/36C09D11/50G02F1/13357
CPCG02F1/133606C09D11/36C09D11/50G02F1/133614
Inventor 王思元王允军邓德晖李鑫
Owner SUZHOU XINGSHUO NANOTECH CO LTD
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