Preparation method of anti-reflection thin film with photo-transformation function

An anti-reflection and light conversion technology, applied in the field of anti-reflection films, can solve the problems of low solar cell conversion efficiency, high cost of vacuum deposition technology, poor film wear resistance, etc., to improve photoelectric conversion efficiency, easy industrial production, and weather resistance. Good results

Inactive Publication Date: 2013-07-03
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the surface of the solar panel, it is usually necessary to install a glass cover for protection. This surface glass cover has a reflection loss of about 8% of the incident sunlight, which is the direct cause of the low conversion efficiency of the solar cell.
The anti-reflection coating on the glass cover of solar cells has also become an important research topic in the field of optical thin films. The commonly used materials are SiO 2 , MgF 2 ,TiO 2 , for a single layer, the effect is not good due to the lack of low refractive index materials; for a double layer, there is only a low reflection in a small wavelength band; for a multilayer structure, the effect is better but the requirements are higher, Too thick and easy to crack
From the perspective of process and cost, the cost of vacuum deposition technology is high, and the film prepared by self-assembly technology has poor wear resistance

Method used

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  • Preparation method of anti-reflection thin film with photo-transformation function
  • Preparation method of anti-reflection thin film with photo-transformation function

Examples

Experimental program
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Effect test

Embodiment 1

[0020] 1) Dissolve europium nitrate hexahydrate and ethyl orthosilicate in absolute ethanol respectively, and drop the solution of europium nitrate hexahydrate in absolute ethanol into ethyl orthosilicate in absolute ethanol under stirring to make Eu 3+ The molar ratio with tetraethyl orthosilicate is 1:10, and the pH is adjusted to 5.5 to obtain a photofunctional sol;

[0021] 2) Under stirring, add the nano-silica hydrosol with a mass concentration of 30% to the polyvinyl alcohol 1788 deionized aqueous solution with a mass concentration of 3% dropwise, so that the mass concentration of silica is 6%, and adjust the pH to 10.0, the matrix sol was obtained;

[0022] 3) Mix the optical functional sol in step 1) and the matrix sol in step 2) evenly at a mass ratio of 1.8:98.2, seal, age, and set aside;

[0023] 4) Coat the mixed sol in step 3) on the glass substrate by spin coating method, so that the thickness of the film layer is 90nm, after drying, place it in a muffle furnac...

Embodiment 2

[0026] 1) Dissolve europium nitrate hexahydrate and ethyl orthosilicate in absolute ethanol respectively, and drop the solution of europium nitrate hexahydrate in absolute ethanol into ethyl orthosilicate in absolute ethanol under stirring to make Eu 3+ The molar ratio with tetraethyl orthosilicate is 1:10, and the pH is adjusted to 2.0 to obtain a photofunctional sol;

[0027] 2) Under stirring, add the nano-silica hydrosol with a mass concentration of 30% to the polyvinyl alcohol 1788 deionized aqueous solution with a mass concentration of 3% dropwise, so that the mass concentration of silica is 6%, and adjust the pH to 2.0, to obtain matrix sol;

[0028] 3) Mix the optical functional sol in step 1) and the matrix sol in step 2) uniformly at a mass ratio of 0.6:99.4, seal, age, and set aside;

[0029] 4) Coat the mixed sol in step 3) on the glass substrate by spraying method, so that the thickness of the film layer is 150nm, after drying, place it in a muffle furnace and he...

Embodiment 3

[0032] 1) Dissolve europium nitrate hexahydrate and ethyl orthosilicate in absolute ethanol respectively, and drop the solution of europium nitrate hexahydrate in absolute ethanol into ethyl orthosilicate in absolute ethanol under stirring to make Eu 3+ The molar ratio with tetraethyl orthosilicate is 1:10, and the pH is adjusted to 5.5 to obtain a photofunctional sol;

[0033] 2) Under stirring, add the nano-silica hydrosol with a mass concentration of 30% to the polyvinyl alcohol 1788 deionized aqueous solution with a mass concentration of 3% dropwise, so that the mass concentration of silica is 3%, and adjust the pH to 10.0, the matrix sol was obtained;

[0034] 3) Mix the optical functional sol in step 1) and the matrix sol in step 2) evenly at a mass ratio of 1.2:98.8, seal, age, and set aside;

[0035] 4) Coating the mixed sol in step 3) on the glass substrate by pulling method, so that the thickness of the film layer is 150nm, after drying, place it in a muffle furnace...

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Abstract

The invention discloses a preparation method of an anti-reflection thin film with a photo-transformation function. The preparation method comprises the following steps of: respectively dissolving europium nitrate hexahydrate and tetraethoxysilane in absolute ethyl alcohol, and dropping an europium nitrate hexahydrate absolute ethyl alcohol solution to obtain photo-functional sol; dropping silicon dioxide hydrosol in a polyvinyl alcohol 1788 de-ionized water solution to obtain matrix sol; and uniformly mixing the photo-functional sol with the matrix sol, coating a film on a glass substrate, drying and implementing a heat treatment to obtain the anti-reflection thin film. The transmittance of the glass substrate on incident light is enhanced through photoluminescence of a rare-earth europium ion. And the preparation method is simple in process and low in cost and easily realizes industrial mass production.

Description

technical field [0001] The invention relates to an anti-reflection film with light conversion function and its preparation and application, in particular to an inorganic material film capable of increasing the light transmittance of glass and its preparation method and application. Background technique [0002] With the improvement of solar cell manufacturing technology, as well as the protection of the environment and the huge demand for renewable clean energy in various countries, solar cells will still be a more practical method for utilizing solar radiation energy. However, at the current stage, almost 90% of commercial solar cells are crystalline silicon solar cells, and the theoretical upper limit of the efficiency of solar cells made of silicon materials is about 30%. Electricity requires an investment of tens of thousands of dollars, so large-scale use remains economically limited. There is not much room to further improve the efficiency of solar cells, and the cost...

Claims

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Application Information

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IPC IPC(8): C03C17/23C03C17/22
Inventor 翁文剑刘长影程逵
Owner ZHEJIANG UNIV
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