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

A composite material and molar weight technology, applied in the field of nanomaterials, can solve problems such as titanium dioxide band gap and unsatisfactory electron transport effect, achieve strong affinity, reduce donor ionization energy, and increase free carrier concentration.

Active Publication Date: 2021-02-23
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, provide a composite material and its preparation method and quantum dot light-emitting diodes, aiming at solving the technology that the existing titanium dioxide has a wide forbidden band, so that its electron transmission effect is not ideal question

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

[0025] On the other hand, the embodiment of the present invention also provides a method for preparing a composite material, such as figure 1 Shown, this preparation method comprises the steps:

[0026] S01: Provide titanium salt, phosphate and vanadium salt;

[0027] S02: dissolving the titanium salt, phosphate and vanadium salt in an organic solvent to obtain a mixed solution;

[0028] S03: mixing the mixed solution with lye and heating to obtain a precursor solution;

[0029] S04: performing solid-liquid separation on the precursor solution to obtain a composite material.

[0030] In the preparation method of the composite material provided by the embodiment of the present invention, a P-V co-doped TiO is prepared by the sol-gel method. 2 Nano-materials, the preparation method is simple, low-cost, suitable for large-scale, large-scale preparation; the final composite material can make TiO 2 The electron Fermi level moves to the conduction band, making TiO 2 The forbidden...

Embodiment 1

[0051] Taking the use of titanium chloride, sodium dihydrogen phosphate, vanadium chloride, ethanol, and sodium hydroxide as examples, the preparation of composite thin films is introduced, including the following steps:

[0052] 1) Add an appropriate amount of titanium chloride, sodium dihydrogen phosphate and vanadium chloride to 50ml of ethanol, stir and dissolve at 70°C to form a salt solution with a total concentration of 0.5M, wherein the molar ratio of titanium: (phosphorus + vanadium) It is 1:0.05; the molar ratio of phosphorus: vanadium is 1:3.

[0053] 2) Take sodium hydroxide by weighing, dissolve in the solution of 10ml ethanol, prepare lye; According to OH - and M x+ (M=titanium+phosphorus+vanadium) molar ratio is 4.5:1. Add lye to the salt solution to form a mixed solution with a pH of 13, and then stir at 70°C for 4 hours to obtain a uniform solution.

[0054] 3) After the solution is cooled, spin-coat the treated ITO with a homogenizer and anneal at 250°C to ...

Embodiment 2

[0056] Taking the use of titanium chloride, sodium dihydrogen phosphate, vanadium chloride, ethanol, and sodium hydroxide as examples, the preparation of composite materials is introduced, including the following steps:

[0057] 1) Add an appropriate amount of titanium chloride, sodium dihydrogen phosphate and vanadium chloride to 50ml of ethanol, stir and dissolve at 70°C to form a salt solution with a total concentration of 0.5M, wherein the molar ratio of titanium: (phosphorus + vanadium) It is 1:0.07; the molar ratio of phosphorus:vanadium is 1:2.5.

[0058] 2) Take sodium hydroxide by weighing, dissolve in the solution of 10ml ethanol, prepare lye; According to OH - and M x+ (M=titanium+phosphorus+vanadium) molar ratio is 4.5:1, add lye to the salt solution to form a mixed solution with pH=13, then stir at 70°C for 4 hours to obtain a homogeneous solution.

[0059] 3) After the solution is cooled, spin-coat the treated ITO with a homogenizer and anneal at 250°C to obtai...

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Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a composite material, a preparation method thereof and a quantum dot light-emitting diode. The composite material comprises titanium dioxide nanoparticles, and phosphorus elements and vanadium elements which are doped in the titanium dioxide nanoparticles. The preparation method of the composite material comprises the following steps: providing titanium salt, orthophosphate and vanadium salt; dissolving the titanium salt, orthophosphate and vanadium salt in an organic solvent to obtain a mixed solution;mixing the mixed solution with alkali liquor, and heating to obtain a precursor solution; and carrying out solid-liquid separation on the precursor solution to obtain the composite material. The composite material provided by the invention is used as a hole transport material of the quantum dot light-emitting diode, can promote effective recombination of electrons and holes in a quantum dot light-emitting layer, and reduces the influence of exciton accumulation on the device performance, thereby improving the display performance of the device.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a composite material, a preparation method thereof and a quantum dot light-emitting diode. Background technique [0002] Titanium dioxide (TiO 2 ) is a widely used multifunctional material with a wide bandgap of 3.2eV. It has unique optical, electrical and physical properties, as well as excellent chemical stability and can resist electrochemical corrosion of the medium. It has been widely used in Coatings, cosmetics, semiconductors, sensors, dielectric materials, catalysts and other fields. In addition, titanium dioxide is an important wide-band indirect bandgap semiconductor material, which is widely used as a functional material for anode catalytic water splitting, solar cells and other photochemical and optoelectronic devices. [0003] On the other hand, titanium dioxide (TiO 2 ), as a cheaper and more stable metal oxide, is widely used in the field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/26H01L33/00B82Y30/00B82Y40/00
CPCH01L33/26H01L33/005B82Y30/00B82Y40/00
Inventor 何斯纳吴龙佳吴劲衡
Owner TCL CORPORATION
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