Light wave conversion-antireflection difunctional sol material and preparation method of thin film thereof

A light wave conversion and anti-reflection technology, which is applied in the field of optical materials, can solve the problems that cannot meet the high-temperature tempering process of photovoltaic glass, and achieve the effects of improving the utilization rate of sunlight, expanding the range of anti-reflection, and increasing the equivalent refractive index

Inactive Publication Date: 2013-04-24
NORTHWEST UNIV(CN)
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Based on the improvement trend of the above-mentioned technology, there have been anti-reflection-lightwave conversion dual-function thin films in the prior art, such as the method disclosed in CN1794475A for preparing a composite wavelength conversion-anti-reflection film on the surface of a silicon solar cell. The film prepared by this method is SiO 2 For anti-reflection coating materials, rare earth organic complexes are used as light wave conversion materials to achieve the dual functions of anti-reflection and light wave conversion. Meet the high temperature tempering process of photovoltaic glass

Method used

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  • Light wave conversion-antireflection difunctional sol material and preparation method of thin film thereof
  • Light wave conversion-antireflection difunctional sol material and preparation method of thin film thereof
  • Light wave conversion-antireflection difunctional sol material and preparation method of thin film thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This example prepares Tb 3+ 0.4%: SiO 2 Sol material, the specific preparation process is as follows:

[0043] 1) At room temperature, mix one of the two equal parts of absolute ethanol with tetraethyl orthosilicate to obtain solution A, and stir the other part of absolute ethanol with deionized water for 30 minutes to obtain solution B; then mix the solution Mix A with solution B, adjust the pH value to 2-3 with concentrated hydrochloric acid, and stir at room temperature for 1 hour to obtain a mixed solution;

[0044] 2) Add Tb(NO 3 ) 3 ·6H 2 O, stirred at room temperature for 4 hours, left to age for 24h to obtain Tb 3+ 0.4%: SiO 2 Lightwave conversion-anti-reflection dual-functional sol material.

[0045] Wherein the mol ratio of ethyl orthosilicate, absolute ethanol total consumption, deionized water and terbium nitrate is: 1:15:4:0.4%, and the concrete consumption of each raw material is as follows:

[0046] Orthoethyl silicate (TEOS) 7.5ml,

[0047] Abso...

Embodiment 2

[0052] The difference between this example and Example 1 is that the molar ratio of the preparation raw materials is: ethyl orthosilicate: total amount of absolute ethanol: deionized water: terbium nitrate=1:20:4:0.4%. The specific consumption of each raw material is:

[0053] Tetraethyl orthosilicate 7.5ml,

[0054] Absolute ethanol 38.9ml,

[0055] Deionized water 2.4ml,

[0056] Tb(NO 3 ) 3 ·6H 2 O 0.06040g.

[0057] The aging temperature during the coating process is 20°C, the aging time is 5 days, and the pulling speed is 8cm / min. After natural drying at room temperature, it is annealed at 550°C for 2 hours to obtain a 100nm thick film. The photoelectric conversion efficiency test results showed that the photoelectric conversion efficiency increased by 2.5% after annealing at 550°C compared with that before coating.

Embodiment 3

[0059] The difference between this example and Example 1 is that the molar ratio of the preparation raw materials is: ethyl orthosilicate: total amount of absolute ethanol: deionized water: terbium nitrate=1:20:4:0.2%. The specific consumption of each raw material is:

[0060] Tetraethyl orthosilicate 7.5ml,

[0061] Absolute ethanol 38.9ml,

[0062] Deionized water 2.4ml,

[0063] Tb(NO 3 ) 3 ·6H 2 O 0.02020g.

[0064] The aging temperature during the coating process was 20°C, the aging time was 5 days, and the pulling speed was 9cm / min. After natural drying at room temperature, it was annealed at 550°C for 2 hours to obtain a film with a thickness of 108nm. The photoelectric conversion efficiency test results showed that the photoelectric conversion efficiency increased by 2.3% after annealing at 550°C compared with that before coating.

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Abstract

The invention discloses a light wave conversion-antireflection difunctional sol material and a preparation method of a thin film thereof. The molecular formula of the disclosed light wave conversion-antireflection difunctional sol material is Am,Bn:SiO2; when A is Tb<3+>, B is Zn<2+>, m is more than or equal to 0.2% and less than or equal to 0.6%, n is more than or equal to 0.2% and less than or equal to 0.8%; or B does not exist, m is more than or equal to 0.2% and less than or equal to 0.6%; when A is Eu<3+>, B is Al<3+>, m is more than or equal to 0.1% and less than or equal to 0.5%, and n is equal to 0.4%. The preparation method of the thin film of the light wave conversion-antireflection difunctional sol material comprises the steps of adding soluble rare-earth salts and/or soluble metal salt into a mixed solution of tetraethoxysilane, absolute ethyl alcohol and deionized water, and coating a film on the surface of glass through sol subjected to hydrolytic polycondensation and ageing by a pulling method, and the dried and annealed wet film has the functions of light wave conversion and antireflection. The effects of light wave conversion and antireflection are achieved by controlling the refractive index and the thickness of the thin film through the preparation processes of regulating the additive amount of a solvent of a precursor solution, the varieties and mixing amount of metal and rear-earth salts, the pulling rate, and the amount of layers of the film.

Description

technical field [0001] The invention belongs to the technical field of optical materials, and in particular relates to a light wave conversion-antireflection dual-functional sol material and a preparation method of a film thereof. Background technique [0002] With the increasingly prominent problems of global energy shortage and environmental pollution, and the depletion of traditional fossil energy resources, solar energy has strong competitiveness as a clean, renewable and durable alternative energy. [0003] Solar cells are one of the important ways to utilize solar energy. Although the solar cell technology is constantly improving, it is still unable to compete with the mains in the short term. One of the main reasons is the low photoelectric conversion efficiency: on the one hand, solar photovoltaic glass and the surface of the cell have a high reflectivity to sunlight, so through The method of depositing anti-reflection film on the surface of photovoltaic glass or ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/22C03C17/34
Inventor 胡晓云冀若楠张倩王利明樊君刘恩周张德恺马益平詹苏昌王越
Owner NORTHWEST UNIV(CN)
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