Preparation method of bifeo3 material, bifeo3/tio2 composite film and application of the composite film

A composite film and film layer technology, which is applied in photovoltaic power generation, electrical components, circuits, etc., can solve the problems of inconvenience, side effects, etc., and achieve the effect of improving absorption rate, improving ferroelectric performance, and increasing visible light absorption rate

Inactive Publication Date: 2016-02-10
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But UV exposure has certain side effects and is inconvenient to use

Method used

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  • Preparation method of bifeo3 material, bifeo3/tio2 composite film and application of the composite film
  • Preparation method of bifeo3 material, bifeo3/tio2 composite film and application of the composite film
  • Preparation method of bifeo3 material, bifeo3/tio2 composite film and application of the composite film

Examples

Experimental program
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preparation example Construction

[0036] TiO of the present invention 2 The preparation method of the material is a conventional preparation method in the art.

[0037] The substrate of the present invention can be selected from substrate materials commonly used in the art, such as glass slides, LaAlO 3 , SrTiO 3 , silicon wafers, etc.

[0038] TiO of the present invention 2 / BFO double-layer film means that the substrate is first coated with TiO 2 thin film, the TiO 2 The film is coated with a bilayer film of BFO film.

[0039] BFO / TiO of the present invention 2 Double-layer film means that the substrate is first coated with a BFO film, and the BFO film is coated with TiO 2 The bilayer film of the film.

Embodiment 1

[0042] This example is about the preparation method of BFO sol.

[0043] (1) 3.0695g bismuth nitrate (Bi(NO 3 ) 3 ) and 2.3511g ferric nitrate (Fe(NO 3 ) 3 ) was dissolved in 20ml of ethylene glycol methyl ether to obtain solution 1, the concentration of which was 0.3mol / l;

[0044] (2) Add complexing agent citric acid to solution 1 to obtain solution 2. The dosage of citric acid is: the molar ratio of citric acid, bismuth ions and iron ions is: 1:1:1;

[0045] (3) Adjust the pH of solution 2 to 4 with acetic acid; obtain BFO sol after aging for 24 hours.

Embodiment 2

[0047] The difference between this embodiment and embodiment 1 is that the concentration of solution one is 0.2 mol / L, and the pH of solution two is 4.

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Abstract

The invention relates to a preparation method of BiFeO3 material, BiFeO3 / TiO2 composite film and application of the composite film. The preparation method of the involved BiFeO3 material comprises: first dissolving bismuth nitrate and ferric nitrate in ethylene glycol methyl ether to obtain solution 1, then dissolving citric acid in solution 1 to obtain solution 2; then adjusting the pH of solution 2 with acetic acid to 3-5; get BiFeO3 sol. The BiFeO3 / TiO2 composite thin film involved includes a substrate, and the substrate is coated with a double-layer thin film, and the double-layer thin film is a BiFeO3 thin film layer and a TiO2 thin film layer. Through the absorption spectrum test and theoretical analysis of the double-layer thin film of the present invention, its absorption rate in the visible light band has been greatly improved. The application involved is about the application of the above-mentioned BiFeO3 / TiO2 composite film to prepare photovoltaic materials, solar cells, photoelectric functional device materials with orientation control, and visible light catalytic bactericidal materials.

Description

technical field [0001] The invention relates to photoelectric material technology, in particular to BiFeO 3 Thin film preparation method, BiFeO 3 / TiO 2 Composite film and application of the composite film. Background technique [0002] Multiferroic materials (multiferroics) are materials that have two or more of the three primary ferromagnetic properties of (anti)ferromagnetism, (anti)ferroelectricity and (anti)ferroelasticity at the same time. When the two order parameters of (anti)ferromagnetism and (anti)ferromagnetism are coupled with each other, a magnetoelectrically coupled multiferroic material is formed. Combining (anti) ferromagnetic materials and (anti) ferroelectric materials in an orderly manner according to a specific structure can realize composite magnetoelectric coupling materials. Due to the mutual repulsion of magnetism and ferroelectricity, natural single-phase magnetoelectric coupling The material is still relatively rare. [0003] BiFeO 3 (BFO) is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0725
CPCY02E10/50
Inventor 冯宏剑段碧王明梓
Owner NORTHWEST UNIV
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