Preparation method of colorful layer of photovoltaic module

Abstract

The invention discloses a preparation method of a colorful layer of a photovoltaic module, and belongs to the technical field of photovoltaic module preparation, and the method comprises the steps: carrying out the plasma treatment of the photovoltaic module, and enabling the surface dyne value of the photovoltaic module to be greater than 40; synthesizing SiO2 nano-particles through regulation and control of a solvent; dispersing the prepared SiO2 nanoparticles into pure water to prepare a solution; coating the surface of transparent glass or a thin film with the solution, and freeze-drying to obtain a SiO2 nano-particle pattern layer, namely a photonic crystal structure color thin film layer; the surface of the SiO2 nano-particle pattern layer on the photonic crystal structure color film layer is coated with bonding gloss oil; the SiO2 nanoparticles can be directly doped in the bonding gloss oil. The photonic crystal structure color film layer is adopted, the preparation process is safe and non-toxic, resources are saved, and the light utilization rate of the full-color layer is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic module preparation, and in particular to a method for preparing a colorful layer of a photovoltaic module. Background Art

[0002] Colored photovoltaic modules help to achieve the integration of photovoltaic components and colorful application environments, and have broad application prospects in the fields of BIPV and mobile energy. There are many ways to add color to photovoltaic modules, such as coloring the battery anti-reflection film, color photovoltaic layer, color packaging film, color front glass, etc. Based on economic and efficiency considerations, the current commercialized color photovoltaic modules are mostly obtained by printing coating, glass coating and other means to obtain colored front glass to achieve the required color; and for the existing printing coating methods of the above products, they usually include inkjet printing and screen printing; inkjet printing is a contactless, pressure-free, and plateless printing and replication technology; it has the characteristics of plateless digital printing and can realize variable information printing. The screen printing plate is mesh-shaped. During printing, the ink on the plate leaks from the through-hole part of the plate to the substrate under the extrusion of the squeegee, thereby completing the printing operation. The above two printing coating methods have their own advantages and are widely used in related industrial fields.

[0003] Existing photovoltaic modules have a variety of colors and can be used in various application scenarios. The current method of coloring photovoltaic modules is to use ink to display the color layer. The thickness of the ink layer will cause some light to be unable to be captured by the photovoltaic module, resulting in light loss and reduced light utilization.

[0004] Therefore, those skilled in the art provide a method for preparing a colorful layer of a photovoltaic module to solve the problems raised in the above background technology. Summary of the invention

[0005] The present invention provides a method for preparing a colorful coating layer of a photovoltaic module, in which SiO2 nano-microspheres can form a photonic crystal structure color film, and the photonic crystal structure color film has higher transmittance, and can maintain the efficiency of the photovoltaic module under the condition of ensuring the colorful coating layer.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A method for preparing a colorful layer of a photovoltaic module of the present invention comprises the following steps:

[0008] S1. Plasma treatment is performed on photovoltaic modules. In a dust-free environment of not less than 100,000 grade, cyclone-type high-pressure dust removal equipment and oil-free compressed air are used to clean and purge the surface of photovoltaic modules. Then, plasma activation treatment is performed on the cleaned surface of photovoltaic modules. The plasma nozzle is adjusted to a height of 10mm to 20mm. The surface dyne value of the photovoltaic modules is greater than 40. The treated photovoltaic modules are affixed with adhesive film stickers.

[0009] S2. Synthesizing SiO2 nanoparticles by solvent regulation; in the entire solvent regulation particle size synthesis reaction system, the volumes of ammonia water, ultrapure water, and tetraethyl orthosilicate remain unchanged, and the volume of ethanol is changed to achieve effective regulation of the SiO2 particle size, and the prepared SiO2 nanoparticles are dispersed in pure water to form a solution;

[0010] S3, coating the solution prepared in step S2 on a film with adhesive backing, and obtaining a SiO2 nanoparticle layer by freeze drying, thereby forming a photonic crystal structure color film layer;

[0011] S4. Coat the surface of the SiO2 nanoparticle layer on the photonic crystal structure color film layer with bonding varnish; the SiO2 nanoparticles can be directly mixed in the bonding varnish.

[0012] Furthermore, the preparation process of SiO2 nanoparticles is as follows: 65-95mL ethanol, 8mL ammonia water and 3mL ultrapure water are added to a 250mL round-bottom flask in sequence, and heated to react under the conditions of a water bath temperature of 50°C and a stirring speed of 600r / min; after the temperature stabilizes, 6mL of tetraethyl orthosilicate is quickly added to the mixed solution, and after 2h, a milky white SiO2 nanoparticle suspension is obtained; after centrifugation and washing, 0.4ml of the milky white SiO2 nanoparticle suspension is taken, and pure water is added until the mass concentration of the solution is 20mg / mL.

[0013] Furthermore, the particle size of SiO2 nanoparticles is 304 nm, and the solution made from SiO2 nanoparticles with a particle size of 304 nm is red.

[0014] Furthermore, the particle size of SiO2 nanoparticles is 282 nm, and the solution made from SiO2 nanoparticles with a particle size of 282 nm is orange.

[0015] Furthermore, the particle size of SiO2 nanoparticles is 274 nm, and the solution made from SiO2 nanoparticles with a particle size of 274 nm is yellow.

[0016] Furthermore, the particle size of SiO2 nanoparticles is 260 nm, and the solution made from SiO2 nanoparticles with a particle size of 260 nm is green.

[0017] Furthermore, the particle size of SiO2 nanoparticles is 200 nm, and the solution made from SiO2 nanoparticles with a particle size of 200 nm is blue.

[0018] In the above technical solution, the present invention provides a method for preparing a colorful layer of a photovoltaic module, which has the following beneficial effects:

[0019] 1. Use photonic crystal structural colors instead of ink. The high light transmittance of the photonic crystal (SiO2 nanoparticle) structural color film layer allows more light to shine on the photovoltaic module, and through the interference of light, the film has a multi-view full-color effect, which not only improves the utilization rate of light in photovoltaic modules, but also saves costs and resources by using structural colors instead of ink.

[0020] 2. Using coating varnish (outdoor varnish) can protect the colorful coating and increase its service life. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below.

[0022] A method for preparing a colorful layer of a photovoltaic module according to Embodiment 1 of the present invention comprises the following steps:

[0023] S1. Perform plasma treatment on photovoltaic modules. In a dust-free environment of not less than Class 100,000, use cyclone-type high-pressure dust removal equipment and oil-free compressed air to clean and purge the surface of photovoltaic modules. Then perform plasma activation treatment on the cleaned surface of photovoltaic modules. Adjust the plasma nozzle to a height of 10 mm to 20 mm. The surface dyne value of the photovoltaic modules is greater than 40.

[0024] S2. Synthesizing SiO2 nanoparticles by solvent regulation; in the entire solvent regulation particle size synthesis reaction system, the volumes of ammonia water, ultrapure water, and ethyl orthosilicate remain unchanged, and the volume of ethanol is changed to achieve effective regulation of SiO2 particle size;

[0025] The preparation process of SiO2 nanoparticles is as follows: 65-95mL ethanol, 8mL ammonia water and 3mL ultrapure water are added to a 250mL round-bottom flask in sequence, and heated to react under the conditions of a water bath temperature of 50°C and a stirring speed of 600r / min; after the temperature stabilizes, 6mL ethyl orthosilicate is quickly added to the mixed solution, and a milky white SiO2 nanoparticle suspension is obtained after 2 hours; after centrifugation and washing, 0.4ml of the milky white SiO2 nanoparticle suspension is taken, and pure water is added until a solution with a mass concentration of 20mg / mL is obtained;

[0026] The particle size of SiO2 nanoparticles is any one of 304nm, 282nm, 274nm, 260nm, and 200nm, wherein the solution made from SiO2 nanoparticles with a particle size of 304nm is red, the solution made from SiO2 nanoparticles with a particle size of 282nm is orange, the solution made from SiO2 nanoparticles with a particle size of 274nm is yellow, the solution made from SiO2 nanoparticles with a particle size of 260nm is green, and the solution made from SiO2 nanoparticles with a particle size of 200nm is blue; 95mL, 90mL, 85mL, 75mL, and 65mL of ethanol are required to synthesize SiO2 nanoparticles with particle sizes of 304nm, 282nm, 274nm, 260nm, and 200nm, respectively.

[0027] S3, applying the solution prepared in step S2 on the treated surface of the photovoltaic module, and obtaining a SiO2 nanoparticle layer by freeze drying, that is, forming a photonic crystal structure color thin film layer;

[0028] S4. Coat the surface of the SiO2 nanoparticle layer on the photonic crystal structure color film layer with bonding varnish; the SiO2 nanoparticles can be directly mixed in the bonding varnish.

[0029] A method for preparing a colorful layer of a photovoltaic module according to Embodiment 2 of the present invention comprises the following steps:

[0030] S1. Plasma treatment is performed on photovoltaic modules. In a dust-free environment of not less than 100,000 grade, cyclone-type high-pressure dust removal equipment and oil-free compressed air are used to clean and purge the surface of photovoltaic modules. Then, plasma activation treatment is performed on the cleaned surface of photovoltaic modules. The plasma nozzle is adjusted to a height of 10mm to 20mm. The surface dyne value of the photovoltaic modules is greater than 40. The treated photovoltaic modules are affixed with adhesive film stickers.

[0031] S2. Synthesizing SiO2 nanoparticles by solvent regulation; in the entire solvent regulation particle size synthesis reaction system, the volumes of ammonia water, ultrapure water, and ethyl orthosilicate remain unchanged, and the volume of ethanol is changed to achieve effective regulation of SiO2 particle size;

[0032] The preparation process of SiO2 nanoparticles is as follows: 65-95mL ethanol, 8mL ammonia water and 3mL ultrapure water are added to a 250mL round-bottom flask in sequence, and heated to react under the conditions of a water bath temperature of 50°C and a stirring speed of 600r / min; after the temperature stabilizes, 6mL ethyl orthosilicate is quickly added to the mixed solution, and a milky white SiO2 nanoparticle suspension is obtained after 2 hours; after centrifugation and washing, it is dispersed in pure water to form a solution;

[0033] The particle size of the SiO2 nanoparticles is any one of 304nm, 282nm, 274nm, 260nm and 200nm, wherein the solution made of the SiO2 nanoparticles with a particle size of 304nm is red, the solution made of the SiO2 nanoparticles with a particle size of 282nm is orange, the solution made of the SiO2 nanoparticles with a particle size of 274nm is yellow, the solution made of the SiO2 nanoparticles with a particle size of 260nm is green, and the solution made of the SiO2 nanoparticles with a particle size of 200nm is blue;

[0034] S3, coating the solution prepared in step S2 on a film with adhesive backing, and obtaining a SiO2 nanoparticle layer by freeze drying, thereby forming a photonic crystal structure color film layer;

[0035] S4. Coat the surface of the SiO2 nanoparticle layer on the photonic crystal structure color film layer with bonding varnish; the SiO2 nanoparticles can be directly mixed in the bonding varnish.

[0036] Embodiment 2 of the present application can satisfy the requirement of replacing different colorful layers. Based on the protection of the photonic crystal structure color thin film layer, outdoor varnish is applied on the outside thereof, and after UV curing, the effect of long-term protection of the material is achieved.

[0037] The present application adopts SiO2 suspensions of different particle sizes to form a photonic crystal structural color film layer, and the photonic crystal structural color film layer has a medium with different dielectric constants, and its basic feature is that it has a photonic band gap (or photonic bandgap). Due to the existence of the photonic band gap, the photonic crystal structural color film layer can modulate the propagation of electromagnetic waves. When its band gap falls within the visible light band, that is, within the range of 380-780nm, electromagnetic waves with wavelengths close to it will not be able to enter the interior of the photonic crystal structural color film layer, but will be selectively reflected by the photonic crystal structural color film layer, and then coherent diffraction will be formed on the surface of the periodically arranged photonic crystal structural color film layer, and the interference reflected light therein will stimulate the human visual system, and a bright and beautiful structural color effect will be produced.

[0038] When the pattern formed by SiO2 nanoparticles of a certain size is observed from different angles, the incident angle changes, and then the wavelength of the structural color changes, and the human eye can observe different colors.

[0039] This application realizes the multi-faceted utilization of light. A part of the light is absorbed by the photovoltaic module through the high permeability of nanoparticles, and the other part of the light is diffracted by the coherent SiO2 nanoparticles to form a multi-view full-color picture. This application not only improves the utilization rate of light by photovoltaic modules, but also saves costs and resources by using structural colors instead of ink. The photonic crystal structural color film layer is made on the inner layer of transparent glass or film, the color layer is mirrored, and is bonded to the front glass of the photovoltaic module through adhesive varnish, and finally after UV curing, it can achieve the function of long-term protection of the material.

[0040] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that, for those skilled in the art, the described embodiments can be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the above description is illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A method for preparing a colorful layer of a photovoltaic module, characterized in that: The following steps are involved: S1. Plasma treatment is performed on photovoltaic modules. In a dust-free environment of not less than 100,000 grade, cyclone-type high-pressure dust removal equipment and oil-free compressed air are used to clean and purge the surface of photovoltaic modules. Then, plasma activation treatment is performed on the cleaned surface of photovoltaic modules. The plasma nozzle is adjusted to a height of 10mm to 20mm. The surface dyne value of the photovoltaic modules is greater than 40. The treated photovoltaic modules are affixed with adhesive film stickers. S2. Synthesizing SiO2 nanoparticles by solvent regulation; in the entire solvent regulation particle size synthesis reaction system, the volumes of ammonia water, ultrapure water, and tetraethyl orthosilicate remain unchanged, and the volume of ethanol is changed to achieve effective regulation of the SiO2 particle size, and the prepared SiO2 nanoparticles are dispersed in pure water to form a solution; S3, coating the solution prepared in step S2 on a film with adhesive backing, and obtaining a SiO2 nanoparticle layer by freeze drying, thereby forming a photonic crystal structure color film layer; S4. Coat the surface of the SiO2 nanoparticle layer on the photonic crystal structure color film layer with bonding varnish; the SiO2 nanoparticles can be directly mixed in the bonding varnish.

2. The method for preparing a colorful layer of a photovoltaic module according to claim 1, characterized in that: The preparation process of SiO2 nanoparticles is as follows: 65-95mL ethanol, 8mL ammonia water and 3mL ultrapure water are added to a 250mL round-bottom flask in sequence, and heated to react under the conditions of a water bath temperature of 50°C and a stirring speed of 600r / min; after the temperature stabilizes, 6mL ethyl orthosilicate is quickly added to the mixed solution, and a milky white SiO2 nanoparticle suspension is obtained after 2 hours; After centrifugation and washing, 0.4 ml of the milky white SiO2 nanoparticle suspension was taken and pure water was added until the mass concentration of the solution was 20 mg / mL.

3. The method for preparing a colorful layer of a photovoltaic module according to claim 1, characterized in that: The particle size of SiO2 nanoparticles is 304 nm, and the solution made from SiO2 nanoparticles with a particle size of 304 nm is red.

4. The method for preparing a colorful layer of a photovoltaic module according to claim 1, characterized in that: The particle size of SiO2 nanoparticles is 282 nm, and the solution made from SiO2 nanoparticles with a particle size of 282 nm is orange.

5. The method for preparing a colorful layer of a photovoltaic module according to claim 1, characterized in that: The particle size of SiO2 nanoparticles is 274 nm, and the solution made from SiO2 nanoparticles with a particle size of 274 nm is yellow.

6. The method for preparing a colorful layer of a photovoltaic module according to claim 1, characterized in that: The particle size of SiO2 nanoparticles is 260nm, and the solution made from SiO2 nanoparticles with a particle size of 260nm is green.

7. The method for preparing a colorful layer of a photovoltaic module according to claim 1, characterized in that: The particle size of SiO2 nanoparticles is 200nm, and the solution made from SiO2 nanoparticles with a particle size of 200nm is blue.