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Quantum dot ink used for preparing QDCF liquid crystal display panel through ink-jet printing and preparation method

A liquid crystal panel and inkjet printing technology, applied in the field of quantum dot light-emitting, can solve the problems of changing surface tension and cohesion, high concentration of quantum dots and difficult to disperse, etc. Effect

Inactive Publication Date: 2017-09-01
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the addition of surface ligands and dispersing resins solves the problem of high concentration of quantum dots in the quantum dot ink used in QDCF and is difficult to disperse. The surface ligands improve the dispersion stability of quantum dots in the ink, and the dispersing resin changes the surface of the ink. Tension and cohesiveness, after film formation, the dispersed resin also plays the role of quantum dot water and oxygen barrier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of quantum dot inkjet ink for printing: 40ml of ultra-dry cyclohexane and 15g of EVA resin were used to dissolve, and the green quantum dot CdSe / ZnS raw material solution (5%) of 100mL quantum dot material was prepared in the glove box environment Carry out vacuum distillation to obtain green quantum dot powder, add 40ml cyclohexane + 2% phospholipid solution to it to mix quantum dot materials, use ultrasonic dispersion for 10-15 minutes, add the above-mentioned spare EVA solution to it, and continue ultrasonication After dispersing for 20 minutes, the monochromatic quantum dot inkjet ink can be obtained.

Embodiment 2

[0018] Preparation of quantum dot inkjet ink for printing: 30ml of ultra-dry cyclohexane and 20g of EVA resin were used to dissolve them, and put them in the glove box environment for later use. Distill 50mL of the raw material solution (15%) of quantum dot materials under reduced pressure to obtain Monochromatic quantum dot powder, add 60ml cyclohexane + 2% octadecene solution to mix quantum dot materials, use ultrasonic dispersion for 10-15 minutes, add the above spare EVA solution to it, continue ultrasonic dispersion, disperse After 20 minutes, the monochromatic quantum dot inkjet ink can be obtained.

Embodiment 3

[0020] Preparation of quantum dot inkjet ink for printing: Use 30ml of ultra-dry cyclohexane and 20g of polyether resin to dissolve them, and store them in a glove box environment for standby. Distill 150mL of the raw material solution (5%) of quantum dot materials under reduced pressure. Obtain monochromatic quantum dot powder, add 50ml cyclohexane + 2% octadecene solution to it to mix quantum dot materials, use ultrasonic dispersion for 10-15 minutes, add the above spare polyether solution to it, continue ultrasonic dispersion , after dispersing for 20 minutes, the monochromatic quantum dot inkjet ink can be obtained.

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PUM

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Abstract

The invention provides quantum dot ink used for preparing a QDCF liquid crystal display panel through ink-jet printing. The quantum dot ink comprises the following components in parts by weight: 60-80 parts of a nonpolar solvent, 15-20 parts of dispersion resin, 1-3 parts of a surface ligand and 5-20 parts of a quantum dot material. The quantum dot ink provided by the invention has the advantages that defects of a photoetching preparation method are overcome, loss of a quantum dot is reduced, preparation method of the QDCF panel is reduced, the solvent can be removed by adopting a low temperature evaporation way, QDCF preparation efficiency is improved, and a cadmium series quantum dot material can be applied to QDCF.

Description

technical field [0001] The present application relates to the technical field of quantum dot luminescence, in particular to a quantum dot ink for preparing QDCF liquid crystal panels by inkjet printing and a preparation method thereof. Background technique [0002] At present, the preparation of quantum dot color filter (QDCF) pixels follows the preparation process of color filter (CF), mainly by dispersing quantum dots of different colors in the existing industrially produced negative photoresist. Form quantum dot photoresist and prepare QDCF pixel points. During this period, it is necessary to improve the heat resistance and alkali resistance stability of quantum dots, and it is necessary to improve various properties of quantum dot materials. Although the quantum dot shell can be changed reasonably The material and thickness of the layer can gradually improve the heat resistance and alkali resistance stability of the quantum dots. Even the negative photoresist prepared by...

Claims

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Application Information

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IPC IPC(8): C09D11/38
CPCC09D11/38
Inventor 岳春波宋志成刘振国刘卫东
Owner HISENSE VISUAL TECH CO LTD
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