Quantum dot composite material, preparation method thereof and quantum dot light-emitting device

A quantum dot material and quantum dot light-emitting technology, which are applied in the field of quantum dot composite materials and their preparation, and quantum dot light-emitting devices, and can solve the problems of insufficient combination of quantum dot materials and organic gels, and unsatisfactory elasticity and toughness of light-emitting materials. , to achieve the effects of strong tensile properties and mechanical properties, enhanced bonding stability, and enhanced dispersion properties

Active Publication Date: 2021-12-07
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a quantum dot composite material, aiming to solve the problem that the combination of the quantum dot material and the organic gel is not strong enough when the existing quantum dots are applied to flexible devices, and the elasticity and toughness of the luminescent material are still low. suboptimal technical issues

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  • Quantum dot composite material, preparation method thereof and quantum dot light-emitting device
  • Quantum dot composite material, preparation method thereof and quantum dot light-emitting device
  • Quantum dot composite material, preparation method thereof and quantum dot light-emitting device

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preparation example Construction

[0028] Such as figure 1 As shown, the embodiment of the present invention provides a method for preparing a quantum dot composite material, comprising the following steps:

[0029] S10. Obtain a silane ligand-modified quantum dot material, and mix the quantum dot material with a polymer monomer to obtain a first mixed system;

[0030] S20. Obtain a metal ion compound, an alginate, and a photoinitiator, and mix the metal ion compound, the alginate, and the photoinitiator with the first mixed system to obtain a second mixed system;

[0031] S30. Reacting the second mixed system under ultraviolet light irradiation conditions to obtain a quantum dot composite material.

[0032]The preparation method of the quantum dot composite material provided by the embodiment of the present invention, first, obtain the quantum dot material modified by the silane ligand, the quantum dot material modified by the silane ligand not only enhances the dispersion performance of the quantum dot mater...

Embodiment 1

[0079] A CdSe quantum dot composite material of double network structure alginic acid / PAAM, the preparation steps comprising:

[0080]1. Disperse 6 mg of CdSe in 10 mL of deionized water, sonicate for 25 minutes, then add 6 mL of vinyltrimethoxysilane, mix well, continue stirring at 70 ° C for 2 hours, wash and dry to obtain vinyltrimethoxysilane-modified CdSe quantum dots ;

[0081] 2. Add Ca 2+ Dissolve with EDTA in 10mL deionized water to make a concentration of 30mmol / L to obtain Ca 2+ - EDTA precursor;

[0082] 3. Dissolve 2 mg of vinyltrimethoxysilane-modified CdSe quantum dots, sodium alginate and acrylamide in the above Ca 2+ -In the EDTA precursor solution, the concentrations of sodium alginate and acrylamide are 1wt / vol% and 3mol / L respectively, after mixing evenly, add 4μL of 2-hydroxy-2-methyl-1-phenylacetone, and stir for 25min, Obtain reaction precursor solution;

[0083] 4. Pour the reaction precursor solution into a petri dish, irradiate with ultraviolet l...

Embodiment 2

[0085] A kind of CdSe with double network structure alginic acid / PEN 1-x S x / CdSe y S 1-y / CdS quantum dot composite material, the preparation steps include:

[0086] 1. Mix 8mg CdSe 1-x S x / CdSe y S 1-y / CdS was dispersed in 10mL of deionized water, ultrasonicated for 30min, then 8mL of vinyltrimethoxysilane was added, after mixing evenly, the stirring was continued at 65°C for 3h, after cleaning, drying was performed to obtain vinyltrimethoxysilane-modified quantum dots;

[0087] 2. Mg 2+ Dissolve EDTA in 10mL of deionized water to make a concentration of 35mmol / L to obtain Mg 2+ with EDTA precursor;

[0088] 3. Dissolve 3 mg of vinyltrimethoxysilane-modified quantum dots, sodium alginate and ethylene naphthalate in the above Mg 2+ -In the EDTA precursor solution, the concentrations of sodium alginate and ethylene naphthalate are 3wt / vol% and 5mol / L respectively, after mixing evenly, add 7μL 2,4,6-trimethylbenzoyl- Diphenylphosphine oxide was stirred for 20 minu...

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Abstract

The invention belongs to the technical field of quantum dots, and particularly relates to a preparation method of a quantum dot composite material, the preparation method comprises the following steps: obtaining a silane ligand modified quantum dot material, and mixing the quantum dot material with a polymer monomer to obtain a first mixed system; obtaining a metal ion compound, alginate and a photoinitiator, and mixing the metal ion compound, the alginate and the photoinitiator with the first mixed system to obtain a second mixed system; enabling the second mixed system to react under the ultraviolet irradiation condition, and obtaining the quantum dot composite material. According to the preparation method of the quantum dot composite material, the prepared quantum dot composite material has a double-layer network structure of the alginate and the polymer, and the quantum dots are protected by two flexible network matrixes of the alginate and the polymer at the same time, so that the quantum dot composite material has more stable optical performance and stronger tensile property and mechanical property, and the method is especially suitable for flexible photoelectric devices.

Description

technical field [0001] The invention belongs to the technical field of quantum dots, in particular to a quantum dot composite material and a preparation method thereof, and a quantum dot light-emitting device. Background technique [0002] Quantum dots are semiconductor nanoparticles. Due to the quantum size effect, excitons are restricted in three dimensions, so quantum dots are also called "zero-dimensional materials". This feature makes quantum dots different from bulk materials and general materials. Molecules have become the focus of researchers in various fields. Quantum dots have a continuous broad excitation spectrum and a narrow and symmetrical emission spectrum, so quantum dots of different sizes and colors can be excited by a single wavelength light source, which is impossible for traditional fluorescent dyes. At the same time, compared with traditional fluorescent materials, it also has higher fluorescence quantum efficiency, stronger fluorescence intensity, hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/26C08L5/04C08L67/02C08K9/06C08K3/30C08J5/18C09K11/02C09K11/88B82Y20/00B82Y30/00H01L51/50
CPCC08L33/26C08L67/02C08J5/18C09K11/025C09K11/883B82Y20/00B82Y30/00C08K2003/3027C08J2333/26C08J2367/02C08J2405/04C08K2201/011H10K50/115C08L5/04C08K9/06C08K3/30
Inventor 叶炜浩
Owner TCL CORPORATION
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