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

A composite material and quantum dot technology, which is applied in the field of quantum dot composite materials and its preparation, and quantum dot light-emitting diodes, can solve the problems of low luminous efficiency of quantum dots, achieve the effects of improving luminous efficiency, easy regulation, and large-scale production

Active Publication Date: 2021-06-29
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a quantum dot composite material and its preparation method, aiming to solve the problem of low luminous efficiency of quantum dots in fluorescent devices

Method used

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

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preparation example Construction

[0047] combine figure 2 , the second aspect of the embodiment of the present invention provides a method for preparing a quantum dot composite material, comprising the following steps:

[0048] S01. Provide quantum dots, single-walled carbon nanohorns and thermally induced delayed fluorescence materials;

[0049] S02. configuring the organic solution of the single-walled carbon nanohorn and the thermally induced delayed fluorescent material, performing a first heating reaction, and preparing a complex formed by combining the single-walled carbon nanohorn and the thermally induced delayed fluorescent material;

[0050] S03. Configure the organic solution of the complex, add the quantum dots, add acid to adjust the pH value of the solution system to be acidic, perform a second heating reaction, and prepare the quantum dot composite material, wherein the single-walled carbon nano Corners and the quantum dots are combined on the surface of the thermally delayed fluorescent mater...

Embodiment 1

[0111] A kind of quantum dot composite material, its preparation method comprises the following steps:

[0112] Take 4 mg of single-walled carbon nanohorns and ultrasonically disperse them in 25 mL of deionized water, add 15 mL of concentrated sulfuric acid, heat and reflux at 120 ° C for 4 h, let stand at room temperature, remove the supernatant, wash and centrifuge, and then vacuum dry at 70 ° C for 12 h; Take 1.5 mg of solid and redisperse it into 10 mL of deionized water to form a suspension, add 0.2 mmol of dicyclohexylcarbodiimide, stir at room temperature for 6 min, then add 6 mmol of mercaptoethylamine, continue stirring for 3 h, and obtain thiol-modified single-wall Carbon nanohorns, dispersed in ethanol, the concentration is 3mg / mL;

[0113] 2mmol TPA-QNX(CN) 2 Disperse in 10ml of ethanol and water mixed solvent (ratio 3:1), add sulfuric acid to adjust the pH value to 3, reflux and heat to 75°C, and react for 1.5h to make TPA-QNX(CN) 2 The cyano group is hydrolyzed...

Embodiment 2

[0117] A kind of quantum dot composite material, its preparation method comprises the following steps:

[0118] Take 4 mg of single-walled carbon nanohorns and ultrasonically disperse them in 30 mL of deionized water, add 15 mL of concentrated sulfuric acid, heat and reflux at 120 ° C for 5 h, let stand at room temperature, remove the supernatant, wash and centrifuge, and then vacuum dry at 70 ° C for 12 h; Take 2 mg of solid and redisperse it into 10 mL of deionized water to form a suspension, add 0.3 mmol of diisopropylcarbodiimide (DIC), stir at room temperature for 10 min, then add 8 mmol of 2-(butylamino)ethanethiol, and continue stirring 4h, after washing, sulfhydryl-modified single-walled carbon nanohorns were obtained, which were dispersed in ethanol at a concentration of 6 mg / mL;

[0119] Disperse 3mmol BFCz-2CN in 10ml of ethanol and water mixed solvent (ratio 3:1), add sulfuric acid to adjust the pH value to 2, reflux and heat to 80°C, and react for 1h to hydrolyze ...

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Abstract

The invention provides a quantum dot composite material. The quantum dot composite material quantum dot composite material comprises quantum dots, a thermally induced delayed fluorescence material and single-walled carbon nanohorns, and the single-walled carbon nanohorns and the quantum dots are combined on the surface of the thermally induced delayed fluorescence material. The quantum dot composite material provided by the invention improves the luminous efficiency of the quantum dots.

Description

technical field [0001] The invention belongs to the technical field of quantum dots, and in particular relates to a quantum dot composite material and a preparation method thereof, and a quantum dot light-emitting diode. Background technique [0002] Graphene quantum dots are two-dimensional materials, which are derived from the continuous reduction of the size of graphene layered materials in two dimensions until the preparation of zero-dimensional carbon materials. All its characteristics are derived from graphene and carbon dots, or can be considered as special small graphene fragments. Due to the obvious quantum confinement effect and boundary effect, graphene quantum dots exhibit low biological toxicity, excellent water solubility, Chemical inertness, stable photoluminescence, and good surface modification have attracted and stimulated great research interests of researchers, making graphene quantum dots attract much attention in optoelectronic devices, sensors, biomark...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/88H01L51/50B82Y20/00B82Y30/00B82Y40/00
CPCC09K11/06C09K11/883B82Y20/00B82Y30/00B82Y40/00C09K2211/1029C09K2211/1044C09K2211/1033C09K2211/1022H10K50/121H10K50/115
Inventor 叶炜浩
Owner TCL CORPORATION
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