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Quantum dot/acrylate polymer nanocrystal composite, preparation method and color conversion film

A technology of color conversion film and acrylate, which is applied to the coating equipment of photoengraving process and the photosensitive material used for opto-mechanical equipment, etc., can solve the problems of low color gamut, low utilization rate of light source, and not enough vivid and true colors, etc. To achieve high luminous efficiency, easy to disperse, to ensure the effect of photoluminescence characteristics

Active Publication Date: 2016-06-01
TCL CORPORATION
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  • Summary
  • 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 object of the present invention is to provide a quantum dot / acrylate polymer nanocrystal composite and its preparation method and color conversion film, aiming at solving the problems caused by the use of color filters in existing liquid crystal displays. The color gamut is relatively low, the color is not bright enough and real, and the light source utilization rate is low

Method used

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  • Quantum dot/acrylate polymer nanocrystal composite, preparation method and color conversion film

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Embodiment 1

[0067]Under a nitrogen atmosphere, polymerize β-hydroxyethyl methacrylate and dimethylaminoethyl methacrylate according to a molar ratio of 1:1 to obtain random polymers, and further, add dimethylaminoethyl methacrylate Equimolar ratio of chlorohydrin, ionized to obtain a cationic acrylate polymer containing ammonium ions. Dissolve it in THF solution to obtain a concentration of 0.5 mgmL -1 Tetrahydrofuran solutions of cationic acrylate polymers, thioglycolic acid ligand-stabilized CdTe / ZnS quantum dots were dissolved in acetone to prepare 0.2mgmL -1 quantum dot nanocrystal solution. Under mechanical stirring, mix 20mL ionic acrylate polymer solution with 15mL quantum dot nanocrystal solution, continue mechanical stirring for 0.5h, then add 100mL precipitant methanol solution of ionic acrylate polymer, remove supernatant, take The precipitate is put into a vacuum oven to remove the residual solvent, and then a CdTe / ZnS quantum dot / ionic acrylate polymer nanocrystal composite...

Embodiment 2

[0073] Under a nitrogen atmosphere, cyclohexyl methacrylate and N-vinylimidazole are polymerized according to a molar ratio of 3:2 to obtain a block polymer, and further, lauryl chloride and N-vinylimidazole in an equimolar ratio are added, and the ions to obtain ionic acrylate polymers. Take 5g and heat it to the melting temperature of 180-200°C. Under mechanical stirring, disperse 2.5g of negatively charged oleic acid-stabilized CdSe / CdS quantum dot powder into the molten ionic acrylate polymer, and continue mechanical stirring After 2 hours, the temperature was naturally lowered to room temperature to obtain a quantum dot / acrylate polymer nanocrystal composite, which was kept in a desiccator (the entire composite process was completed under the protection of an inert gas).

[0074] The preparation method of described color conversion film comprises the following steps:

[0075] i) Disperse the CdSe / CdS quantum dots / ionic acrylate polymer nanocrystal composite in the photor...

Embodiment 3

[0079] Under a nitrogen atmosphere, the block polymer obtained by polymerizing lauryl methacrylate and p-chloromethyl styrene according to the molar ratio of 2:1, further, adding N-formaldehyde in an equimolar ratio to p-chloromethyl styrene Based imidazole, ionized to prepare cationic acrylate polymer. Dissolve it in chloroform hot liquid to obtain a concentration of 0.2 mgmL -1 Chloroform solutions of cationic acrylate polymers, 0.1mgmL -1 quantum dot nanocrystal solution. Under mechanical stirring, mix 10mL of imidazolium ionic acrylate polymer solution with 10mL of quantum dot solution, continue mechanical stirring for 0.5h, let stand to separate layers, the quantum dots will be extracted into the ionic acrylate polymer chloroform solution, take out One layer of chloroform solution of ionic acrylate polymer, the solvent is removed by rotary evaporation, and then the quantum dot / acrylate polymer nanocrystal composite is obtained, which is kept in a desiccator for future u...

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Abstract

The invention discloses a quantum dot / acrylate polymer nanocrystal complex, a preparation method of the quantum dot / acrylate polymer nanocrystal complex, and a colored conversion coating, wherein the quantum dot / acrylate polymer nanocrystal complex is prepared by virtue of electrostatic interaction between an annion acrylate polymer and quantum dots with opposite charges. According to the invention, the quantum dots are pre-dispersed into the acrylate polymer, so as to prepare quantum dot / acrylate polymer nanocrystal complex. By virtue of similar composition of an acrylate polymer protection layer and acrylics as well as an acrylics modified photoresist resin matrix, the quantum dots can be easily dispersed into photoresist, are not easy to separate and are uniformly dispersed without aggregation, and thus the photoluminescent characteristic of the quantum dots is ensured. After the colored conversion coating prepared from the quantum dot / acrylate polymer nanocrystal complex is applied to a display, the colors of sub-pixel units of R / G / B colors corresponding to the colored conversion coating are relatively pure and have the relatively high saturability, energy of a backlight is sufficiently utilized, and the luminous efficiency is relatively high.

Description

technical field [0001] The invention relates to the technical field of liquid crystal displays, in particular to a quantum dot / acrylate polymer nanocrystal composite, a preparation method and a color conversion film. Background technique [0002] Liquid crystal display (LCD) has successfully entered many display fields such as computers and televisions due to its excellent picture quality, external size and low energy consumption. Color filters are an important component of liquid crystal displays. Liquid crystal displays can present color images, mainly relying on the filtering effect of color filters. The white light from the backlight passes through the liquid crystal layer and irradiates the color filter, and passes through the color filter corresponding to the red, green, and blue pigment photoresist on each pixel to form red, green, and blue light, which are finally mixed in the human eye. Form a color image. In addition to obtaining red, green, and blue monochromati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/14C08K3/10C08K3/30C08L53/00C08L33/12C08F8/44C08F220/28C08F220/34C08F220/16C08F226/06C08F212/14C08F220/14C08F222/02G03F7/16G03F7/004
Inventor 李雪付东谢相伟孙闲文濮怡莹
Owner TCL CORPORATION
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