A dustproof anti-reflection coating structure of solar photovoltaic glass

Abstract

The utility model discloses a dustproof antireflection coating structure of solar photovoltaic glass, it includes base layer, nanometer level micropore array layer, hydrophobic protective layer and transition adhesive layer. Micropore array layer is formed regular hexagon micropore through laser etching, and the aperture is 100-300 nanometers, and the depth is 200-500 nanometers, to enhance the light transmittance, hydrophobic protective layer is made of fluorinated siloxane material, and is equipped with the convex structure on the surface, and the height is 50-100 nanometers, and improves waterproofness and self -cleaning ability, and transition adhesive layer inlays titanium oxide particle, and absorbs ultraviolet and improves weather resistance. The application improves the light transmittance through optimizing micropore geometry shape and distribution density, and realizes excellent dustproof effect by using the hydrophobic layer, prolongs the service life, reduces the maintenance cost, is applicable to photovoltaic module manufacturing field, and provides the guarantee for the long -term stable operation of photovoltaic system.

Description

Technical Field

[0001] This utility model relates to the field of solar photovoltaic technology, and in particular to a dustproof and anti-reflective coating structure for solar photovoltaic glass. Background Technology

[0002] As a crucial component of photovoltaic power generation systems, the light transmittance and surface cleanliness of solar photovoltaic glass directly impact photoelectric conversion efficiency. In practical applications, photovoltaic glass surfaces are susceptible to the adhesion of contaminants such as dust and dirt. These contaminants significantly reduce light transmittance, thereby affecting the power generation efficiency of photovoltaic modules. Furthermore, long-term exposure to outdoor environments can also lead to erosion from natural factors such as wind, sand, and rain, further exacerbating surface contamination and the degradation of optical performance.

[0003] Currently, there are several technical solutions available for surface treatment of photovoltaic glass, such as using coating technology to improve the glass's dustproof performance or optical transparency. However, existing coating structures generally have some shortcomings. On the one hand, while some dustproof coatings can reduce dust adhesion, their optical transparency is limited, failing to simultaneously achieve both dustproof and high light transmittance. On the other hand, while some antireflective coatings can improve light transmittance, they perform poorly in terms of weather resistance and anti-pollution capabilities, easily failing due to environmental factors. Furthermore, there is a lack of a simple, low-cost, and easily mass-producible dustproof and antireflective coating solution in the current technology.

[0004] Therefore, developing a photovoltaic glass coating structure that effectively prevents dust while significantly improving light transmittance, while also possessing good weather resistance and stability, has become a pressing technical challenge. This invention addresses this need by proposing an innovative dust-proof and anti-reflective coating structure to overcome the shortcomings of existing technologies and provide new technical support for improving the performance of photovoltaic glass. Utility Model Content

[0005] The purpose of this utility model is to provide a dustproof and anti-reflective coating structure for solar photovoltaic glass, which solves the problems mentioned in the background art.

[0006] This invention is achieved by providing a dustproof and antireflective coating structure for solar photovoltaic glass. The structure mainly consists of a base layer, a transition adhesive layer disposed on the base layer, a nanoscale microporous array layer located on the transition adhesive layer, and a hydrophobic protective layer covering the surface of the nanoscale microporous array layer. The transition adhesive layer contains embedded titanium oxide particles.

[0007] A further technical solution of this utility model is: the surface of the nanoscale micropore array layer forms regularly arranged hexagonal micropores, the depth of the hexagonal micropores is 200-500 nanometers, the pore size is 100-300 nanometers, and the center-to-center spacing of the hexagonal micropores is 400-600 nanometers.

[0008] A further technical solution of this utility model is: the outer surface of the hydrophobic protective layer is provided with a protruding structure corresponding to the hexagonal micropores of the nanoscale micropore array layer, and the height of the protruding structure is 50-100 nanometers.

[0009] A further technical solution of this utility model is: the thickness of the transition adhesive layer is 10-20 micrometers, and the particle size range of the titanium oxide particles is 20-50 nanometers.

[0010] A further technical solution of this utility model is: the hydrophobic protective layer is made of fluorinated siloxane material, and its thickness is 5-10 micrometers.

[0011] A further technical solution of this utility model is: the base layer is made of a highly transparent glass material, and its surface roughness is less than or equal to Ra0.05 micrometers.

[0012] A further technical solution of this utility model is: the transition adhesive layer is applied to the substrate layer by a spraying process, the distance between the spray gun and the substrate layer during the spraying process is 15-20 cm, and the spraying pressure is 0.2-0.3 MPa.

[0013] The beneficial effects of this invention are as follows: This invention provides a dustproof and anti-reflective coating structure for solar photovoltaic glass. By optimizing the geometry and distribution density of the microporous array, it significantly improves the light transmittance of the photovoltaic glass and achieves excellent dustproof performance through the special structure of the hydrophobic protective layer. The titanium oxide particles in the transition bonding layer further enhance the coating's weather resistance and extend its service life. This invention features an ingenious structural design and a simple and feasible process, enabling its widespread application in photovoltaic module manufacturing. It not only improves photoelectric conversion efficiency but also significantly reduces the impact of dust on the performance of photovoltaic glass, thus providing a reliable guarantee for the long-term stable operation of photovoltaic systems. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention, showing the overall arrangement of the base layer, transition adhesive layer, nanoscale microporous array layer and hydrophobic protective layer.

[0015] Figure 2 This is an enlarged view of the nanoscale microporous array layer.

[0016] Figure 3 This is a schematic diagram of the surface structure of the hydrophobic protective layer.

[0017] The attached figures are labeled as follows:

[0018] 1. Base layer; 2. Transition adhesive layer; 3. Nanoscale microporous array layer; 4. Hydrophobic protective layer; 5. Hexagonal micropores; 6. Protruding structure; 7. Titanium oxide particles. Detailed Implementation

[0019] This utility model provides a dustproof and anti-reflective coating structure for solar photovoltaic glass, the specific implementation of which is described in conjunction with the appendix. Figure 1 To be continued Figure 3 Detailed explanation provided. See attached document. Figure 1 As shown, the structure mainly consists of a base layer 1, a transition adhesive layer 2 disposed on the base layer 1, a nanoscale microporous array layer 3 located on the transition adhesive layer 2, and a hydrophobic protective layer 4 covering the surface of the nanoscale microporous array layer 3. The fit and specific design parameters between the layers are key to achieving the technical effect of this invention.

[0020] The base layer 1, serving as the foundation of the entire coating structure, is made of high-transparency glass, typically 3-5 mm thick, to ensure good mechanical strength and optical properties. The surface of the base layer 1 is polished to a surface roughness of less than Ra 0.05 micrometers, providing a good foundation for the adhesion of subsequent coatings. The transition bonding layer 2, 10-20 micrometers thick, is applied to the upper surface of the base layer 1. This layer is made of epoxy resin and uniformly embeds titanium oxide particles 7, with a particle size ranging from 20-50 nanometers. These titanium oxide particles 7 not only effectively absorb ultraviolet light but also enhance the overall weather resistance and extend the coating's service life. The transition bonding layer 2 is applied to the base layer 1 via a spraying process. During spraying, the distance between the spray gun and the base layer 1 must be controlled between 15-20 cm, and the spraying pressure must be 0.2-0.3 MPa to ensure a uniform coating without bubbles.

[0021] The nanoscale microporous array layer 3 is located above the transition adhesive layer 2, and it was fabricated using laser etching technology. (See attached image) Figure 2As shown, the surface of the nanoscale micropore array layer 3 is formed with regularly arranged hexagonal micropores 5. The depth of the micropores 5 is 200-500 nm, and the pore size is 100-300 nm. The geometry and distribution density of the hexagonal micropores 5 are optimized to enhance light scattering and transmittance. Specifically, the center-to-center spacing of the hexagonal micropores 5 is 400-600 nm. This arrangement can maximize light transmission efficiency while ensuring structural stability. During the laser etching process, a 355 nm ultraviolet laser is used with a laser power of 5-8 watts and a scanning speed of 500-800 mm / s to ensure that the size and shape of the micropores 5 meet the design requirements. In addition, to further improve the adhesion of the micropore array layer 3, plasma cleaning is required after laser etching. The cleaning time is 5-10 minutes, and the cleaning gas is a mixture of oxygen and argon with a volume ratio of 3:1.

[0022] A hydrophobic protective layer 4 covers the surface of the nanoscale microporous array layer 3, with a thickness of 5-10 micrometers. The hydrophobic protective layer 4 is made of a fluorinated siloxane material, which possesses excellent hydrophobicity and weather resistance. (See attached image.) Figure 3 As shown, the outer surface of the hydrophobic protective layer 4 has raised structures 6 corresponding to the microporous array, with a height of 50-100 nanometers. These raised structures 6 not only further improve water resistance but also significantly enhance self-cleaning ability. The hydrophobic protective layer 4 is prepared using a spin coating process at a speed of 2000-3000 rpm for 30-60 seconds, followed by thermosetting at 120-150 degrees Celsius for 10-15 minutes. During thermosetting, the ambient humidity must be kept below 40% to avoid the influence of moisture on the coating performance.

[0023] The working principle of this invention lies in achieving dustproof and light-reflective effects through the synergistic effect of various functional layers. When light shines on the surface of the photovoltaic glass, the hexagonal micropores 5 in the nanoscale microporous array layer 3 can effectively scatter the incident light, increasing the propagation path of light inside the glass and thus improving light transmittance. Simultaneously, the raised structure 6 of the hydrophobic protective layer 4 reduces the adhesion of water droplets and dust particles to the surface, allowing rainwater or wind to easily remove surface contaminants, thereby achieving a self-cleaning function. The titanium oxide particles 7 in the transition bonding layer 2 absorb ultraviolet light to protect the coating from photoaging, extending the service life of the overall structure.

[0024] In practical applications, the coating structure of this invention can be widely used in the field of photovoltaic module manufacturing. For example, in large-scale photovoltaic power plants, the surface of photovoltaic modules is exposed to the outdoor environment for a long time and is easily corroded by dust and rainwater. After adopting the coating structure of this invention, the light transmittance of photovoltaic glass is increased by 10-15%, and the photoelectric conversion efficiency is correspondingly increased by 5-8%. In addition, due to the self-cleaning ability of the hydrophobic protective layer 4, the maintenance frequency of photovoltaic modules is significantly reduced, from the original 4-6 times to 1-2 times per year, greatly reducing maintenance costs. In high-dust areas such as deserts, the dustproof effect of this invention is particularly significant. Experimental data shows that after 6 months of continuous operation, the amount of dust accumulated on the surface of photovoltaic glass is only about 30% of that of traditional glass.

[0025] To further verify the technical effects of this invention, several comparative experiments were conducted. The experimental results show that the photovoltaic glass using the coating structure of this invention outperforms traditional photovoltaic glass under various weather conditions. For example, in rainy conditions, the surface water contact angle of traditional photovoltaic glass is 40-50 degrees, while the water contact angle of this invention reaches 110-120 degrees, demonstrating stronger hydrophobicity. Under sunny conditions, the light transmittance of this invention is 12% higher than that of traditional photovoltaic glass, and the photoelectric conversion efficiency is improved by approximately 6%. Furthermore, after 1000 hours of ultraviolet aging testing, the coating structure of this invention did not show significant performance degradation, while the light transmittance of traditional photovoltaic glass decreased by approximately 8%.

[0026] In summary, this invention significantly improves the light transmittance of photovoltaic glass by optimizing the geometry and distribution density of the micropore array, and achieves excellent dustproof performance through the special structure of the hydrophobic protective layer. The titanium oxide particles in the transition bonding layer further enhance the weather resistance of the coating and extend its service life. This invention features an ingenious structural design and a simple and feasible process, making it widely applicable in the field of photovoltaic module manufacturing. It not only improves photoelectric conversion efficiency but also significantly reduces the impact of dust on the performance of photovoltaic glass, thus providing a reliable guarantee for the long-term stable operation of photovoltaic systems.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dustproof and anti-reflective coating structure for solar photovoltaic glass, characterized in that, The structure mainly consists of a base layer (1), a transition bonding layer (2) disposed on the base layer (1), a nanoscale microporous array layer (3) located on the transition bonding layer (2), and a hydrophobic protective layer (4) covering the surface of the nanoscale microporous array layer (3), wherein the transition bonding layer (2) is embedded with titanium oxide particles (7).

2. The dustproof and anti-reflective coating structure for solar photovoltaic glass according to claim 1, characterized in that: The surface of the nanoscale micropore array layer (3) forms regularly arranged hexagonal micropores (5), the depth of the hexagonal micropores (5) is 200-500 nanometers, the pore size is 100-300 nanometers, and the center spacing of the hexagonal micropores (5) is 400-600 nanometers.

3. The dustproof and anti-reflective coating structure for solar photovoltaic glass according to claim 1, characterized in that: The outer surface of the hydrophobic protective layer (4) is provided with a protrusion structure (6) corresponding to the hexagonal micropores (5) of the nanoscale micropore array layer (3), and the height of the protrusion structure (6) is 50-100 nanometers.

4. The dustproof and anti-reflective coating structure for solar photovoltaic glass according to claim 1, characterized in that: The thickness of the transition adhesive layer (2) is 10-20 micrometers, and the particle size of the titanium oxide particles (7) is 20-50 nanometers.

5. The dustproof and anti-reflective coating structure for solar photovoltaic glass according to claim 1, characterized in that: The hydrophobic protective layer (4) is made of fluorinated siloxane material and has a thickness of 5-10 micrometers.

6. The dustproof and anti-reflective coating structure for solar photovoltaic glass according to claim 1, characterized in that: The substrate (1) is made of a highly transparent glass material with a surface roughness of less than or equal to Ra0.05 micrometers.

7. The dustproof and anti-reflective coating structure for solar photovoltaic glass according to claim 1, characterized in that: The transition bonding layer (2) is applied to the base layer (1) by spraying. During the spraying process, the distance between the spray gun and the base layer (1) is 15-20 cm, and the spraying pressure is 0.2-0.3 MPa.

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