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Composite material, preparation method thereof and light-emitting diode

A composite material and compound technology, applied in the fields of light-emitting diodes, composite materials and preparation methods thereof, can solve the problems of easy agglomeration of nano-zinc oxide particles, and achieve the effects of improving carrier transport capacity, reducing agglomeration and reducing surface contact

Pending Publication Date: 2022-07-01
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above deficiencies in the prior art, the object of the present invention is to provide a composite material and its preparation method, and a light-emitting diode, aiming to solve the problem that the existing nano-zinc oxide particles are easy to agglomerate

Method used

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  • Composite material, preparation method thereof and light-emitting diode
  • Composite material, preparation method thereof and light-emitting diode
  • Composite material, preparation method thereof and light-emitting diode

Examples

Experimental program
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Effect test

Embodiment 1

[0075] 1. The preparation steps of the composite material are as follows:

[0076] 01. First, add an appropriate amount of zinc acetate into 50ml of ethanol solution to prepare a 1M zinc acetate ethanol solution, and stir and dissolve at 70°C to obtain precursor solution 1;

[0077] 02. Weigh potassium hydroxide by Zn and OH-mol ratio of 1:1.5, add potassium hydroxide to 50ml of ethanol solution, prepare a 1.5M potassium hydroxide solution, and obtain precursor solution 2 after stirring and dissolving;

[0078] 03. Inject Precursor Solution 1 into Precursor Solution 2 at an injection rate of 10 mL / min. Then use magnetic stirring. After 30min, add benzylamine liquid, the molar ratio of benzylamine and Zn salt is 20:1, and heat to 50°C with magnetic stirring until the solution is completely clear;

[0079] 04. Wash the prepared solution to obtain a composite material solution.

[0080] 2. The preparation steps of the QLED device with the upright structure are as follows:

[...

Embodiment 2

[0087] 1. The preparation steps of the composite material are as follows:

[0088] 01 First, add an appropriate amount of zinc acetate to 50ml of ethanol solution to prepare a 1M zinc acetate ethanol solution, and stir and dissolve at 70°C to obtain precursor solution 1;

[0089] 02. Weigh sodium hydroxide according to the mol ratio of Zn and OH- being 1:1.3, add sodium hydroxide to 50ml of ethanol solution, prepare a 1.3M potassium hydroxide solution, stir and dissolve to obtain precursor solution 2;

[0090] 03. Inject Precursor Solution 1 into Precursor Solution 2 at an injection rate of 5 mL / min. Then use magnetic stirring. After 30min, add tribenzylamine powder, the molar ratio of tribenzylamine to Zn salt is 30:1, and magnetic stirring at room temperature until the solution is completely clear;

[0091] 04. Cleaning the prepared solution to obtain a composite material solution;

[0092] 2. The preparation steps of the upright QLED device are as follows:

[0093] 07. ...

Embodiment 3

[0099] 1. The preparation steps of the composite material are as follows:

[0100] 01. First, add an appropriate amount of zinc acetate into 50ml of ethanol solution to prepare a 1M zinc acetate ethanol solution, and stir and dissolve at 70°C to obtain precursor solution 1;

[0101] 02. Weigh potassium hydroxide according to the mol ratio of Zn and OH- as 1:1.1, add sodium hydroxide to 50ml of ethanol solution, prepare a 1.1M potassium hydroxide solution, and obtain precursor solution 2 after stirring and dissolving;

[0102] 03. Inject Precursor Solution 1 into Precursor Solution 2 at an injection rate of 10 mL / min. Then use magnetic stirring. After 30min, add 3-phenylbenzylamine, the molar ratio of 3-phenylbenzylamine and Zn salt is 20:1, and magnetic stirring at room temperature until the solution is completely clear;

[0103] 04. Cleaning the prepared solution to obtain a composite material solution;

[0104] 2. The fabrication steps of the inverted QLED device are as f...

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Abstract

The invention discloses a composite material, a preparation method thereof and a light-emitting diode, and the composite material comprises zinc oxide nanoparticles and benzylamine compounds combined on the surfaces of the zinc oxide nanoparticles. In the composite material disclosed by the invention, after the benzylamine compound is combined on the surfaces of the zinc oxide nano-particles, not only can the surface defects of zinc oxide be passivated, but also the distance between the zinc oxide nano-particles can be increased, and the surface contact is reduced, so that the occurrence of agglomeration is reduced; a benzene ring in the benzylamine compound has a conjugated large pi bond, so that the carrier transport capacity of the composite material can be effectively improved.

Description

technical field [0001] The invention relates to the field of light-emitting diodes, in particular to a composite material and a preparation method thereof, and a light-emitting diode. Background technique [0002] A quantum dot light-emitting diode (QLED) is a structure composed of a cathode, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer and an anode. When a voltage is applied, electrons and holes are injected from their respective electrodes, and the two emit light together. QLEDs have attracted more and more attention due to their excellent properties such as wide absorption and narrow emission, high color purity and luminous intensity due to their continuously tunable spectrum in the visible region. [0003] ZnO is a common Ⅱ-Ⅵ semiconductor compound, the forbidden band width of its material can reach 3.34eV, has the coordination of optoelectronic properties, and is an ideal electron transport layer material. Electron transport l...

Claims

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Application Information

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IPC IPC(8): H01L51/56H01L51/54H01L51/50B82Y40/00B82Y30/00
CPCB82Y40/00B82Y30/00H10K50/115H10K50/16H10K2102/00H10K71/00
Inventor 李俊杰张天朔郭煜林
Owner TCL CORPORATION
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