Quantum dot/polyurethane nano crystal complex and preparation method thereof as well as colorful conversion film

A color conversion film and nanocrystal technology, applied in the direction of photosensitive materials for opto-mechanical equipment, etc., can solve the problems of low color gamut, not bright and realistic colors, low light source utilization, etc., and achieve high luminous efficiency and saturation. High, pure color effect

Inactive Publication Date: 2014-04-09
TCL CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a quantum dot/polyurethane nanocrystal composite and its preparation method and color conversion film, aiming at solving the problem of using white ligh

Method used

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  • Quantum dot/polyurethane nano crystal complex and preparation method thereof as well as colorful conversion film

Examples

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Example Embodiment

[0065] The quantum dot / polyurethane nanocrystal composite prepared by the above method increases the interaction between the quantum dot and the photoresist, and overcomes the problem of high activity, extremely unstable, and easy agglomeration of the atoms on the surface of the quantum dot. It is better dispersed in the photoresist and exerts the light-emitting properties of quantum dots. Therefore, the quantum dot / polyurethane nanocrystal composite can be used to prepare a color conversion film, and the preparation method of the color conversion film includes the following steps:

[0066] i) Disperse the quantum dot / ionic polyurethane nanocrystal composite in photoresist, and coat it on the transparent substrate of the prepared black matrix to form a photoresist film with dispersed quantum dots; ii) Pass the mask Exposing the photoresist film; iii) developing the exposed photoresist film.

[0067] Among them, the main components of the so-called photoresist are alkali-soluble re...

Example Embodiment

[0072] Example 1: Preparation of quantum dot / polyurethane nanocrystal composite by solution blending method

[0073] Under a nitrogen atmosphere, 10mol 2,4-toluene diisocyanate, 6mol polyethylene glycol PEG400, 5mol dibromoneopentyl glycol are prepared anyway to obtain a polyurethane with a side chain containing bromine atoms, and further, 5mol imidazole and a side chain containing bromine atoms Imidazole cationic polyurethane was prepared by the quaternization reaction of the polyurethane, which was dissolved in methyl ethyl ketone hydrothermal solution to obtain a concentration of 0.1 mg mL -1 In the methyl ethyl ketone solution of ionic polyurethane, dissolve CdTe / ZnS quantum dots stabilized by thioglycolic acid ligand in acetone solution to prepare 0.02 mg mL -1 Quantum dot nanocrystalline solution. Under mechanical stirring, mix 10 mL of imidazole cationic polyurethane solution with 10 mL of quantum dot solution, continue to mechanically stir for 0.5 h, then add imidazole cat...

Example Embodiment

[0076] Example 2: Preparation of quantum dot / polyurethane nanocrystal composite by melt blending method

[0077] In a nitrogen atmosphere, 15mol 1,6-hexyl diisocyanate, 7mol unsaturated polyester diol 191#, 8mol 2,2-dimethylolpropionic acid are prepared anyway to obtain a polyurethane with a side chain containing -COOH groups, and further , 8mol of triethylamine and the side chain of the polyurethane containing -COOH groups undergo acid addition salt reaction to prepare anionic polyurethane containing -COO-, take 5g and heat it to above the melting temperature, under mechanical stirring, 1g mercaptoethyl Disperse the amine-stabilized CdSe / CdS quantum dot powder into the molten ionic polyurethane, continue to mechanically stir for 2h, and naturally cool to room temperature to obtain the CdSe / CdS quantum dot / anionic polyurethane nanocrystal composite, and put it in the desiccator Keep it for use (the entire compounding process is completed under the protection of inert gas).

[0078...

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Abstract

The invention discloses a quantum dot/polyurethane nano crystal complex and a preparation method thereof as well as a colorful conversion film. The quantum dot/polyurethane nano crystal complex is prepared by electrostatic interaction effects of ion type polyurethane and a quantum dot with opposite charges. The colorful conversion film is prepared by taking the quantum dot/polyurethane nano crystal complex as a raw material and replacing the quantum dot by a traditional pigment to be dispersed into a photoresist to prepare the colorful conversion film, wherein the polyurethane in the quantum dot/polyurethane nano crystal complex has the effect of smoothly dispersing the quantum dot into the photoresist to ensure that the quantum dot can express the luminous effect. The colorful conversion film can be used for enabling the light emitted by a display device to be pure; the saturation degree is high; the energy of a backlight source is sufficiently utilized and the luminous efficiency is high.

Description

technical field [0001] The invention relates to the technical field of liquid crystal displays, in particular to a quantum dot / polyurethane nano crystal compound, a preparation method and a color conversion film. Background technique [0002] A liquid crystal display (Liquid Crystal Display, LCD) has the advantages of small size, light weight, long service life, energy saving and environmental protection, and is currently a mainstream product among display devices. Liquid crystal displays usually use a white light emitting diode (Light Emitting Diode, LED) backlight to form a color display with an ordinary color substrate. The backlight is generally a white backlight. The color filter substrate is composed of a substrate, a color filter layer and a black matrix on the substrate. After the white light backlight is filtered by the red, green and blue primary colors (R / G / B) of the color filter layer in the color filter substrate, it not only obtains Monochromatic light also co...

Claims

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Application Information

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IPC IPC(8): C08L75/14C08K3/10C08K3/30C08K3/28G03F7/004
Inventor 李雪付东谢相伟孙闲文濮怡莹
Owner TCL CORPORATION
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