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Quantum-dot composition, quantum-dot luminescent material, preparation method therefor and luminescent device containing quantum-dot luminescent material

A quantum dot luminescence and quantum dot technology, which is applied in the field of luminescent material solution, can solve the problems of aging and instability of quantum dot luminescent materials, and achieve the effects of maintaining long-term stability, improving luminous efficiency, and maintaining efficiency

Active Publication Date: 2019-03-05
NANJING TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a quantum dot composition, a quantum dot luminescent material, a preparation method thereof, and a light emitting device containing the quantum dot luminescent material, so as to solve the aging instability problem of the quantum dot luminescent material in the prior art

Method used

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  • Quantum-dot composition, quantum-dot luminescent material, preparation method therefor and luminescent device containing quantum-dot luminescent material
  • Quantum-dot composition, quantum-dot luminescent material, preparation method therefor and luminescent device containing quantum-dot luminescent material
  • Quantum-dot composition, quantum-dot luminescent material, preparation method therefor and luminescent device containing quantum-dot luminescent material

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preparation example Construction

[0076] In the seventh typical embodiment of the present application, a method for preparing a quantum dot luminescent material is provided. The preparation method includes: dissolving the dissolution medium in which quantum dots are dispersed in any of the above quantum dot compositions, an emulsifier and polymer precursors are mixed to obtain a mixture; the mixture is cured to obtain a quantum dot luminescent material. There is no limitation on the order of adding each material when preparing the mixture. Preferably, the quantum dots, dissolution medium and emulsifier are added to the polymer precursor together to reduce the contact time between the quantum dots and the polymer precursor.

[0077]In the preparation method of the above-mentioned quantum dot luminescent material, by adding an emulsifier to the composition, the dissolution medium can be effectively compatible with the emulsifier, so that the emulsifier wraps the dissolution medium into microemulsions one by one, ...

Embodiment 1

[0086] Prepare the polymer precursor (the raw materials before curing include: prepolymer, diluent and curing agent), prepare the emulsifier, prepare the CdSe / CdS quantum dot solution (mix the quantum dot with the dissolution medium), mix the emulsifier and quantum dot solution Adding it to the polymer precursor, forming a mixture with microemulsion at 1000 rpm for 20 minutes; curing the above mixture to obtain a quantum dot luminescent material.

[0087] Each raw material in the mixture is shown in Table 1, and the dosage ratio and specific reaction conditions between each raw material are shown in Table 2.

Embodiment 2 to 8

[0089] Examples 2 to 8 were prepared using the same steps as in Example 1, using the preparation parameters and conditions shown in Table 1 and Table 2.

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Abstract

The invention provides a quantum-dot composition, a quantum-dot luminescent material, a preparation method therefor and a luminescent device containing the quantum-dot luminescent material. The quantum-dot composition comprises a micro emulsion and a macromolecular precursor for dispersing the micro emulsion, wherein the micro emulsion comprises quantum dots, a dissolving medium for dissolving thequantum dots and an emulsifier for wrapping the dissolving medium. Firstly, the quantum dots are dissolved in the dissolving medium, and then, the quantum dot dissolved dissolving medium is added into the macromolecular precursor. The emulsifier is amphiphilic, one end of the emulsifier is connected with the macromolecular precursor, the other end of the emulsifier is connected with the dissolving medium, the quantum dot dissolved dissolving medium can form the micro emulsion by using an emulsifying action of the emulsifier, and the contact between the quantum dots and the macromolecular precursor is effectively avoided, so that the quantum dots can be present inside the micro emulsion and are stably dispersed in the macromolecular precursor, the luminescence efficiency of the formed quantum-dot luminescent material is increased, and the aging stability of the quantum dots is improved.

Description

technical field [0001] The invention relates to the field of luminescent material solutions, in particular to a quantum dot composition, a quantum dot luminescent material, a preparation method thereof and a luminescent device containing the same. Background technique [0002] Because the size of quantum dots is very small, mostly 1-10nm, with a very large specific surface area, there are a large number of unpaired electrons and unsaturated suspensions on the surface, the chemical properties are extremely unstable, and they are extremely sensitive to oxygen molecules and water molecules. Since there are a large number of unpaired electrons and unsaturated suspensions on the surface of quantum dots, on the one hand, the stability of quantum dots can be improved by designing the core-shell structure, and on the other hand, the stability of quantum dots can be improved by ligand modification on the surface of quantum dots. The type and thickness of the shell and ligand have an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/88C08F283/00C08F283/01C08F220/20C08F220/54C08F220/18C08G59/50H01L51/50H01L51/54
CPCC09K11/025C09K11/883C08F283/008C08F283/01C08G59/5006C08G59/5033H10K85/00H10K50/115H10K50/00H10K2102/00H10K2102/301C08F220/1811C08F220/1808C08F220/20C08F220/54C08G59/50C09K11/02C09K11/88B82Y40/00B82Y30/00B82Y20/00C08F290/061C08F290/067
Inventor 方龙吕梦冰王海琳赵飞
Owner NANJING TECH CORP LTD
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