Quantum dot composition, quantum dot light-emitting material, preparation method thereof and light-emitting device containing same

A quantum dot luminescent 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, maintaining efficiency, and improving luminous efficiency

Active Publication Date: 2020-03-31
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 light-emitting material, preparation method thereof and light-emitting device containing same
  • Quantum dot composition, quantum dot light-emitting material, preparation method thereof and light-emitting device containing same
  • Quantum dot composition, quantum dot light-emitting material, preparation method thereof and light-emitting device containing same

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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, the dissolution medium and the 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 ...

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 light-emitting material, a preparation method thereof and a light-emitting device containing the quantum dot composition. The quantum dot composition includes microemulsions and polymer precursors of dispersed microemulsions, wherein the microemulsions include quantum dots, a dissolution medium for dissolving the quantum dots, and an emulsifier for wrapping the dissolution medium. Firstly, the quantum dots are dissolved in the dissolution medium, and then the dissolution medium in which the quantum dots are dissolved is added to the polymer precursor. Since the emulsifier is amphiphilic, one end is connected to the polymer precursor, and the other end is connected to the dissolution medium. The emulsification of the emulsifier makes the dissolution medium in which the quantum dots are dissolved form a microemulsion, which effectively avoids the quantum dots and the polymer precursor. body contact, thereby ensuring that the quantum dots exist inside the microemulsion and are stably dispersed in the polymer precursor, improving the luminous efficiency of the formed quantum dot luminescent material and the aging stability of the quantum dots.

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 Patents(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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