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Composite material, preparation method thereof and quantum dot light emitting diode

A composite material and molecular technology, applied in the field of materials, can solve the problems of large influencing factors of quantum dot light-emitting diodes and complicated factors of quantum dot life, and achieve the effects of good transmission performance, improved stability and not easy to fall off.

Active Publication Date: 2020-09-11
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Quantum dot display, as the next generation of new display technology, still has many technical problems that have not been resolved, the most important of which is the problem of lifetime; the factors that affect the lifetime of quantum dots are more complicated, one of which is the functional layer electron transport layer of quantum dots. The influence factors of quantum dot light-emitting diodes are relatively large, and it is speculated that one of the factors may be related to the surface state of the metal oxide nanoparticles in the electron transport layer

Method used

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  • Composite material, preparation method thereof and quantum dot light emitting diode
  • Composite material, preparation method thereof and quantum dot light emitting diode
  • Composite material, preparation method thereof and quantum dot light emitting diode

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preparation example Construction

[0031] Such as figure 2 As shown, some embodiments of the present invention also provide a method for preparing a composite material, which includes the following steps:

[0032] S01 provides metal oxide nanoparticles;

[0033] S02 mixing the metal oxide nanoparticles and organic molecules in a polar solvent to react to obtain the composite material;

[0034] The composite material includes metal oxide nanoparticles and organic molecules bound on the surface of the metal oxide nanoparticles, and the organic molecules are selected from the group consisting of epihalohydrin compound molecules, vinyl sulfone compound molecules, cyanogen halide compound molecules, Trifluoroalkane sulfonyl halide molecule, carbonylimidazole or disuccinimidyl carbonate.

[0035] In some embodiments, in the step S01, the metal oxide nanoparticles are n-type semiconductor materials, for example, in some specific embodiments, selected from one or more binary metal oxide nanoparticles and / or binary...

Embodiment 1

[0065] 1) Take 1mmol of cyanogen bromide and 100mg of ZnO nanoparticles 1 and disperse them in 20ml of ethanol and place them in the air, then stir at room temperature for 20min, add a precipitant to the mixture after the stirring is stopped, and then centrifuge to obtain the surface ZnO nanoparticles containing cyanate groups2.

[0066] 2) Prepare the ZnO nanoparticles 2 with stable molecules on the surface prepared in 1) to a concentration of 30 mg / ml for later use.

[0067] 3) Use the ZnO nanoparticles 2 prepared in 2) to prepare an electron transport layer on the light-emitting layer of the quantum dot light-emitting device by spin coating, and then prepare a complete quantum dot light-emitting device on the evaporation electrode and device packaging .

Embodiment 2

[0069] 1) Take 1mmol of epichlorohydrin and 100mg of ZnMgO nanoparticles 1 and disperse them in 20ml of ethanol and place them in the air, then stir at room temperature for 20min, add a precipitant to the mixture after the stirring is stopped, and then centrifuge to obtain the surface ZnMgO nanoparticles containing epoxy groups 2.

[0070] 2) Prepare the ZnMgO nanoparticles 2 with stable molecules on the surface prepared in 1) to a concentration of 30 mg / ml for later use.

[0071] 3) Use ZnMgO nanoparticles 2 prepared in 2) to prepare an electron transport layer on the light-emitting layer of the quantum dot light-emitting device by spin coating, and then prepare a complete quantum dot light-emitting device on the evaporation electrode and device packaging .

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Abstract

The invention provides a composite material, a preparation method thereof and a quantum dot light emitting diode. The composite material comprises metal oxide nanoparticles and organic molecules combined on the surfaces of the metal oxide nanoparticles, wherein the organic molecule is selected from an epihalohydrin compound molecule, a vinyl sulfone compound molecule, a cyanogen halide compound molecule, a trifluoroalkane sulfonyl halide compound molecule, carbonyl imidazole or disuccinimido carbonate. The surface of the composite material is provided with stable organic molecules, when the composite material is used as an electron transport layer of a quantum dot light emitting diode, good transmission performance can be kept in a working state, the organic molecules on the surface of thecomposite material are not prone to falling off, and the stability of a device can be improved.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a composite material and a preparation method thereof, in particular to an electron transport material of a quantum dot light-emitting diode and a preparation method thereof. Background technique [0002] Nanomaterials are known as the most promising materials in the 21st century, and quantum dots, as an important branch in the field of nanomaterials, also have important application and research values. [0003] For luminescent quantum dots, due to their special optical and electrical properties, they can be used in many fields such as: light emitting diodes, solar cells, fluorescent biomarkers, lighting and other fields. [0004] Quantum dot display, as the next generation of new display technology, still has many technical problems that have not been resolved, the most important of which is the problem of lifetime; the factors that affect the lifetime of quantum dots are more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/54H01L51/50H01L51/56B82Y30/00
CPCB82Y30/00H10K50/115H10K50/165H10K2102/00H10K71/00
Inventor 程陆玲杨一行
Owner TCL CORPORATION
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