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Quantum dot film and preparation method thereof, patterning method of quantum dot film and display

A quantum dot film and quantum dot technology, which is applied in the field of flat panel display, can solve the problems that quantum dots cannot be effectively dispersed, quantum dots have low luminous brightness, and are easy to quench.

Active Publication Date: 2019-11-05
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when preparing the quantum dot film, it is necessary to mix the quantum dots with the photoresist first. In this step, the inventors found that the quantum dots cannot actually be effectively dispersed in the organic solvent, so that they are not compatible with the photoresist. When the glue components are mixed to prepare the quantum dot film, it is not easy to disperse evenly in the photoresist, and as the concentration of quantum dots dissolved in the photoresist increases, aggregation will also form in the photoresist. As a result, quantum dot films containing high-concentration quantum dots cannot be prepared; in addition, quantum dots themselves have defects such as low luminous brightness and easy quenching, so at this stage, quantum dot films cannot be well applied to color filters.

Method used

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  • Quantum dot film and preparation method thereof, patterning method of quantum dot film and display
  • Quantum dot film and preparation method thereof, patterning method of quantum dot film and display

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preparation example Construction

[0061] Such as figure 2 As shown, another aspect of the embodiments of the present invention provides a method for preparing a quantum dot film, the preparation method comprising the following steps:

[0062] Step 1: Completely dissolve the quantum dots in the dispersant to obtain a quantum dot solution.

[0063] In this step, more than 0 and less than or equal to 60 parts of quantum dots are completely dissolved in 5-90 parts of dispersant to obtain a quantum dot solution, wherein the quantum dots can be CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, A mixture of at least one or two or more of HgS, HgTe, GaN, GaAs, InP, InAs, the dispersant can choose chloroform, tetrahydrofuran, methylene chloride, toluene, n-hexane, methanol, ethanol, propanol, butanol, At least one or a mixture of two or more of acetone, dioxane, dimethylformamide and dimethyl sulfoxide. The weight part of the dispersant added is preferably 20-60 parts.

[0064] Step 2: mixing resin, monomer containing unsaturated ...

Embodiment 1

[0087] Dissolve 0.011g of quantum dots in 200 μL of dispersant, ultrasonically dissolve the quantum dots completely to obtain a quantum dot solution; then add the quantum dot solution dropwise to 200 μL of photoresist mother liquor (containing resin, unsaturated double bond Monomer, photoinitiator, silicon coupling agent, auxiliary agent and solvent), ultrasonic 10 minutes, obtain quantum dot spin-coating solution; Coat quantum dot spin-coating solution with the coating speed of 6 revolutions / second, obtain smooth and uniform Quantum dot film with a film thickness of 1.8 μm.

[0088] The quantum dots and the photoresist mother liquor in Example 1 were converted, and the solid content of the photoresist mother liquor after conversion was 22.9%; the weight part of the red quantum dots in the dry film after removing the solvent was 20%.

Embodiment 2

[0090] Dissolve 0.017 g of quantum dots in 200 μL of dispersant, ultrasonically dissolve the quantum dots completely to obtain a quantum dot solution; then add the quantum dot solution dropwise to 200 μL of photoresist mother liquor (containing resin, unsaturated double bond Monomer, photoinitiator, silicon coupling agent, auxiliary agent and solvent), ultrasonic 10 minutes, obtain quantum dot spin-coating solution; Coat quantum dot spin-coating solution with the coating speed of 6 revolutions / second, obtain smooth and uniform Quantum dot film with a film thickness of 1.6 μm.

[0091] The quantum dots and the photoresist mother liquor in Example 2 were converted, and the solid content of the photoresist mother liquor after conversion was 22.9%; the weight part of the red quantum dots in the dry film after removing the solvent was 27%.

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Abstract

The invention provides a quantum dot film and its preparation method, a patterning method of the quantum dot film and a display, which belong to the field of flat panel display technology, and can effectively disperse quantum dots in a photoresist solution, thereby preparing a Quantum dot film of quantum dots. The quantum dot film is made of the following components and raw materials by weight: quantum dots: greater than 0 and less than or equal to 60 parts; dispersant: 5-90 parts; resin: 5-45 parts; Monomer: 0.5-18 parts; photoinitiator: 0.1-3 parts; silicon coupling agent: 0.1-7 parts; auxiliary agent: 0.1-1 parts; solvent: 40-85 parts. The invention can be used in the preparation process of the quantum dot film.

Description

technical field [0001] The invention relates to the field of flat panel display technology, in particular to a quantum dot film and a preparation method thereof, a patterning method of the quantum dot film and a display. Background technique [0002] The backlight module is the light source provider of the display, and all the colors that the display can display also come from the light emitted by the backlight module. The backlight used in existing displays is generally a white backlight, which is formed by mixing blue LEDs and yellow LEDs, and the color is not pure, and the white backlight is filtered by the color filter unit in the color film substrate. The obtained monochromatic light also contains a variety of colors other than the desired color, so that the final emitted light has defects such as low chroma and low color saturation, resulting in a low color gamut of the display screen and insufficient colors. Bright and real. [0003] Quantum Dots (QD), also known as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/004G03F7/00
CPCG03F7/0035G03F7/004G03F7/0007G03F7/0047G03F7/027G03F7/16H01L33/502G02F1/00G03F1/00
Inventor 周婷婷张斌齐永莲谢蒂旎
Owner BOE TECH GRP CO LTD
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