Film, preparation method thereof, and quantum dot light-emitting diode

A quantum dot light-emitting and diode technology, which is applied in semiconductor/solid-state device manufacturing, electrical components, circuits, etc., can solve the problems of low electron mobility of metal oxides, poor luminous efficiency of quantum dot light-emitting diodes, etc.

Active Publication Date: 2020-07-07
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a composite material and its preparation method, a quantum dot light-emitting diode and its preparation method, aiming at solving the problem that the electron mobility of the existing metal oxide is low, resulting in the above-mentioned The problem of poor luminous efficiency of quantum dot light-emitting diodes with metal oxides as electron transport layers

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  • Film, preparation method thereof, and quantum dot light-emitting diode
  • Film, preparation method thereof, and quantum dot light-emitting diode
  • Film, preparation method thereof, and quantum dot light-emitting diode

Examples

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Embodiment 1

[0065] A quantum dot light-emitting diode, which includes an ITO substrate, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer and a cathode stacked from bottom to top, wherein the electron transport layer material is made of yttrium acetylacetonate and oxide Composite materials formed by coordination and bonding of titanium. The preparation method of the quantum dot light-emitting diode comprises the steps of:

[0066] 1) Preparation of yttrium acetylacetonate: put an appropriate amount of yttrium oxide in a small beaker, first add a small amount of distilled water, slowly add dilute sulfuric acid dropwise under magnetic stirring, until the white powder gradually dissolves into a colorless solution, add 6 ml acetylacetone After forming an oil-water two-phase (molar ratio, acetylacetone: Y 3+ =3:1), then add a small amount of ethanol, and the reaction solution is homogeneously dispersed; slowly add a pre-configured 1 M NaOH solution dropwi...

Embodiment 2

[0075] A quantum dot light-emitting diode, which includes an ITO substrate, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer and a cathode stacked from bottom to top, wherein the electron transport layer material is made of yttrium acetylacetonate and oxide Composite materials formed by coordination and bonding of titanium. The preparation method of the quantum dot light-emitting diode comprises the steps of:

[0076] 1) Preparation of yttrium acetylacetonate: put an appropriate amount of yttrium oxide in a small beaker, first add a small amount of distilled water, slowly add dilute nitric acid dropwise under magnetic stirring, until the white powder gradually dissolves into a colorless solution, add 6 ml of acetylacetone After forming an oil-water two-phase (molar ratio, acetylacetone: Y 3+ =3:1), then add a small amount of ethanol, and the reaction solution is homogeneously dispersed; slowly add a pre-configured 1 M KOH solution dropwi...

Embodiment 3

[0085] A quantum dot light-emitting diode, which includes an ITO substrate, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer and a cathode stacked from bottom to top, wherein the electron transport layer material is made of yttrium acetylacetonate and oxide Composite materials formed by coordination and bonding of titanium. The preparation method of the quantum dot light-emitting diode comprises the steps of:

[0086] 1) Preparation of yttrium acetylacetonate: put an appropriate amount of yttrium oxide in a small beaker, first add a small amount of distilled water, slowly add dilute hydrochloric acid dropwise under magnetic stirring, until the white powder gradually dissolves into a colorless solution, add 6 ml acetylacetone After forming an oil-water two-phase (molar ratio, acetylacetone: Y 3+ =3:1), and then add a small amount of methanol, the reaction solution is homogeneously dispersed; slowly add a pre-configured 1 M LiOH solution (...

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Abstract

The invention discloses a composite material and a preparation method thereof, a quantum dot light emitting diode, and a preparation method thereof, wherein the composite material comprises titanium oxide and yttrium acetylacetonate coordinated and combined on the surface of the titanium oxide. According to the invention, yttrium acetylacetonate with conjugation performance is selected to carry out surface modification on titanium oxide, so that yttrium acetylacetonate is coordinated and combined on the surface of titanium oxide to prepare the composite material with high electron mobility; when the composite material is used as an electron transport layer of a quantum dot light emitting diode. Therefore, not only can the electron transmission efficiency of the electron transmission layerbe improved, but also the capability of injecting electrons into the quantum dot light-emitting layer can be improved, effective recombination of electrons and holes is promoted, and the influence ofexciton accumulation on the performance of the quantum dot light-emitting diode is reduced, so that the light-emitting efficiency of the quantum dot light-emitting diode is improved.

Description

technical field [0001] The invention relates to the field of quantum dot light-emitting diodes, in particular to a thin film, a preparation method thereof and a quantum dot light-emitting diode. Background technique [0002] TiO 2 It is a widely used multifunctional material with a wide bandgap of 3.2 eV. 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. TiO 2 It is an important wide bandgap indirect bandgap semiconductor material, and is widely used as a functional material for photochemical and optoelectronic devices such as solar cells. [0003] On the other hand, titanium oxide (TiO 2 ), as a cheaper and more stable metal oxide, is also widely used in the fields of electrode materials, gas-sensitive materials and supercapacitors, and can also...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K85/30H10K50/115H10K50/165H10K2102/101H10K71/00
Inventor何斯纳吴龙佳吴劲衡
OwnerTCL CORPORATION