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Composite material and preparation method thereof, photovoltaic device and light emitting diode

A composite material and cathode technology, which is applied in the field of nanomaterials, can solve the problem of slow carrier mobility and achieve the effect of increasing the carrier mobility and increasing the LUMO energy level

Pending Publication Date: 2021-07-16
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One object of the present invention is to provide a composite material and its preparation method, aiming to solve the technical problem of slow carrier transfer rate of titanium dioxide material

Method used

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  • Composite material and preparation method thereof, photovoltaic device and light emitting diode
  • Composite material and preparation method thereof, photovoltaic device and light emitting diode
  • Composite material and preparation method thereof, photovoltaic device and light emitting diode

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preparation example Construction

[0034] On the one hand, the embodiment of the present invention provides a preparation method of a composite material, such as figure 1 As shown, the preparation method comprises the following steps:

[0035] S01: dissolving aluminum salt and indium salt in a first solvent to obtain a first solution;

[0036] S02: dissolving the titanium-containing precursor salt in the second solvent to obtain the second solution;

[0037] S03: adding the first solution to the second solution, and after standing for treatment, a precursor solution is obtained;

[0038] S04: calcining the precursor solution to obtain the composite material.

[0039] In the preparation method of the composite material provided in the embodiment of the present invention, the first solution prepared with aluminum salt and indium salt is added to the second solution prepared with the precursor salt containing titanium element, and the precursor solution is formed after standing for reaction, and the precursor T...

Embodiment 1

[0076] A photovoltaic device, from bottom to top, comprises: ITO glass, an electron transport layer, a quantum dot photosensitive absorption layer, a hole transport layer and an anode; the preparation method thereof comprises the following steps:

[0077] (1) Preparation of precursor solution for forming electron transport layer

[0078] A: Add 1 mmol of aluminum nitrate, 1 mmol of indium nitrate, 10 ml of deionized water, and 40 ml of absolute ethanol into a 100-ml beaker in turn, stir and dissolve at room temperature to obtain a uniform solution A containing aluminum and indium ions;

[0079] B: Add 5ml of butyl titanate and 50ml of absolute ethanol into a 100ml beaker successively, and stir evenly at room temperature to obtain a uniform and transparent butyl titanate ethanol solution B;

[0080] Next, take 25 ml of the above solution A, slowly drop it into 55 ml of the above solution B, and continue to stir. After the dropwise addition is completed, the mixed solution is tr...

Embodiment 2

[0087] A photovoltaic device, from bottom to top, comprises: ITO glass, an electron transport layer, a quantum dot photosensitive absorption layer, a hole transport layer and an anode; the preparation method thereof comprises the following steps:

[0088] (1) Preparation of precursor solution for forming electron transport layer

[0089] A: Add 1 mmol of aluminum chloride, 2 mmol of indium chloride, 10 ml of deionized water, and 40 ml of absolute ethanol into a 100 ml beaker in turn, stir and dissolve at room temperature to obtain a uniform solution A containing aluminum and indium ions;

[0090] B: Add 5ml of butyl titanate and 50ml of absolute ethanol into a 100ml beaker successively, and stir evenly at room temperature to obtain a uniform and transparent butyl titanate ethanol solution B;

[0091] Next, take 25 ml of the above solution A, slowly drop it into 55 ml of the above solution B, and continue to stir. After the dropwise addition is completed, the mixed solution is ...

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Abstract

The invention belongs to the technical field of nano materials, and particularly relates to a composite material and a preparation method thereof, a photovoltaic device and a light-emitting diode. The composite material comprises titanium dioxide nanoparticles, and an aluminum element and an indium element which are doped in the titanium dioxide nanoparticles. According to the invention, the HOMO energy level of the titanium dioxide nano material can be reduced in a manner that the titanium dioxide nanoparticles are co-doped with In and Al while the LUMO energy level of the titanium dioxide nano material is improved, so that when the composite material is used for a quantum dot device, the composite material can be well matched with an energy level structure of a quantum dot so as to improve the carrier migration rate in the device.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to a composite material and a preparation method thereof, a photovoltaic device and a light emitting diode. Background technique [0002] Quantum Dot (QD) has the optical characteristics of wide excitation spectrum, narrow emission spectrum, tunable emission wavelength, and high luminous efficiency, and is considered to be a promising new optoelectronic material. The study found that the light conversion efficiency of solar cells based on metal halide perovskite quantum dot materials can reach 20%, which is unmatched by other materials. [0003] At present, in high-efficiency quantum dot solar cells, the basic structures of the cells include glass, fluorine-doped tin oxide (SnO) 2 -F, FTO), electron transport layer, light absorption sensitization layer, hole transport layer and metal electrode. As the most commonly used material for electron transport layer, tita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/48H01L51/54H01L51/50H01L51/56C03C17/42
CPCC03C17/42H10K85/30H10K30/151H10K50/11H10K2101/40H10K50/115H10K50/165H10K2102/101Y02E10/549
Inventor 丘洁龙
Owner TCL CORPORATION