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Nanomaterial and preparation method thereof, optical thin film and light-emitting device

A technology of nanomaterials and optical thin films, which is applied in the field of optical thin films and light-emitting devices, nanomaterials and their preparation, and can solve the problems of poor luminescence properties of fluorescent nanoparticles

Active Publication Date: 2021-07-16
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a nanomaterial, which aims to solve the problem of poor luminescence performance of existing fluorescent nanoparticles

Method used

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  • Nanomaterial and preparation method thereof, optical thin film and light-emitting device

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Embodiment approach

[0022] As an embodiment, the particle diameter of the quantum dots is 5-16 nanometers, and the particle diameter of the aromatic polymer gel particles is less than 100 nanometers. By adjusting the particle diameters of the quantum dots and the aromatic polymer gel particles within the above range, the luminescent properties of the nanomaterials can be effectively improved on the premise of ensuring that the quantum dots have a good quantum effect. When the particle size of the aromatic polymer gel particle is greater than 100 nanometers, the aromatic polymer layer covering the outer surface of the quantum dot is too thick, and the effect of improving the luminescence performance of the nanomaterial cannot be achieved.

[0023] Specifically, the aromatic polymer gel particle is a kind of three-dimensional network structure material composed of amphiphilic polymer chains, which has the characteristic that the gel can be swelled in the solvent, and can be uniformly dispersed in th...

Embodiment 1

[0088] This embodiment provides an optical film, the preparation of which specifically includes the following steps:

[0089] Disperse 0.3mmol of 2,6-dihydroxyphenol and 1.5mg of CdSe quantum dots in 20mL of solvent (dimethylformamide / water, volume ratio 8:2), add 0.5mmol of 1,3,5 -Trimethylhexylhydroxy-1,3,5-triazine, continue to stir until the mixture is homogeneous, put the mixture into a 30 mL glass container, and then stir and heat in a microwave reactor at 150° C. for 5 min. Then, the reaction product was centrifuged at 20,000 rpm for 40 minutes at a high speed, collected and washed with dimethylformamide, and dried to obtain a CdSe / 2,6-dihydroxyphenol nanomaterial;

[0090] Disperse 2 mg of the above nanomaterials in 20 mL of ethyl acetate to obtain a nanomaterial solution; dissolve 100 mg of polymethyl methacrylate in 10 mL of ethyl acetate to obtain a polymethyl methacrylate solution; Mix equal volumes of methyl acrylate solution, cast the mixture on a glass plate, a...

Embodiment 2

[0093] This embodiment provides an optical film, the preparation of which specifically includes the following steps:

[0094] 0.2mmol of 2,6-dihydroxynaphthalene and 1.5mg of CdSe 1-x S x / CdSe y S 1-y / CdS quantum dots were dispersed in 20 mL of solvent (dimethylformamide / water, volume ratio 7:3), and 0.3 mmol of 1,3,5-trimethylhexylhydroxy-1,3,5-tris Continue to stir until the mixture is homogeneous, put the mixture into a 30mL glass container, and then stir and heat in a microwave reactor at 170°C for 4min. Then, the reaction product was centrifuged at 25,000 rpm for 30 min at high speed, collected and washed with dimethylformamide, and dried to obtain CdSe 1-x S x / CdSe y S 1-y / CdS / 1,3,5-trimethylhexylhydroxy-1,3,5-triazine nanomaterials;

[0095] Disperse 3mg of the above-mentioned nanomaterials in 20mL dimethyl sulfoxide to obtain a nanomaterial solution; dissolve 110mg of polyvinyl alcohol in 10mL of dimethyl sulfoxide to obtain a polyvinyl alcohol solution; mi...

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Abstract

The invention belongs to the technical field of display, and particularly relates to a nano material and a preparation method thereof, an optical thin film and a light-emitting device. The nano material provided by the invention comprises quantum dots and aromatic polymer gel particles, wherein the quantum dots are embedded in the aromatic polymer gel particles. According to the nanometer material, the quantum dots serve as the inner core, the quantum dots can serve as an excitation light source of the aromatic polymer gel particles, when the quantum dots excite an emission light source through an electric field or an external light source, the aromatic polymer gel particles can be synchronously excited to emit the light source, the response time of material luminescence is greatly shortened, and the luminescence efficiency is remarkably improved; and meanwhile, high solvent dispersity and transparency are achieved, and light emission is continuous and stable. The problem that existing fluorescent nanoparticles are poor in luminescence performance is solved.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a nanometer material, a preparation method thereof, an optical thin film and a light emitting device. Background technique [0002] Fluorescent nanoparticles refer to inorganic semiconductor nanoparticles that can emit fluorescence or fluorescent dyes formed by introducing fluorescent chromophores into organic or inorganic nanoparticles through embedding, covalent bonding, etc., including quantum dots, highly fluorescent Molecular nanospheres and composite fluorescent silica nanoparticles, etc. Due to the characteristics of high brightness and photostability, good water dispersibility and biocompatibility, fluorescent nanoparticles have been widely used in many technical fields such as light-emitting devices, chemical sensors and biological probes in recent years. However, due to many factors, such as: poor dispersion of quantum dots, low dye content of fluorescent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/88H01L51/50
CPCC09K11/025C09K11/883H10K50/11
Inventor 叶炜浩
Owner TCL CORPORATION
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