Antireflection self-cleaning coated glass, method for preparing same, and use thereof

Abstract

The application discloses a kind of antireflection self-cleaning coated glass and its preparation method and application, preparation method includes using organic silicon dispersed in ethanol reaction preparation nano SiO2 Colloid template, then preparation MOFs crystal, again MOFs crystal, nano SiO2 Colloid template, catalyst mixed reaction forms shell-core structure, join modified waterborne acrylic polyurethane containing hydrophilic anion group and silane coupling agent form coating liquid, coating liquid is plated on the glass substrate after pretreatment, by drying solidification, cooling and post-processing, obtain antireflection self-cleaning coated glass.The antireflection self-cleaning coated glass of the application has excellent light antireflection performance and dust self-cleaning function simultaneously, can be better applied in photovoltaic power generation field.

Description

Technical Field

[0001] This invention belongs to the field of nanocomposite materials technology, specifically relating to an antireflective self-cleaning coated glass, its preparation method, and its application. Background Technology

[0002] Since the power generation efficiency of photovoltaic panels is mainly affected by the efficiency of solar cells, and the materials used to encapsulate the solar modules also affect the cell efficiency, the power generation efficiency of solar cells cannot be fully realized. Among these factors, photovoltaic glass is a major factor affecting the power generation efficiency of solar cells. As the light transmittance of photovoltaic glass itself reaches its limit, it is impossible to further improve the power generation efficiency of solar modules. In recent years, with the development of solar cells, there are stricter requirements for higher conversion efficiency and lower cost, thus demanding increasingly higher light transmittance from photovoltaic glass. The light transmittance of existing photovoltaic glass is around 92%, and even the maximum light transmittance of coated glass with higher transmittance can only reach about 93%-94%, leaving room for improvement of 6%-7%. However, it is difficult to further improve the transmittance of coated photovoltaic glass with current technology. On the one hand, the light transmittance of glass has already reached over 90%, limiting the room for improvement; on the other hand, the anti-reflection performance of existing anti-reflection materials is approaching its limit.

[0003] The main principle of photovoltaic (PV) power generation is the photoelectric effect of semiconductors. Besides temperature and sunlight, dust is the biggest factor affecting the power generation efficiency of solar photovoltaic modules. Without manual dust removal, long-term dust accumulation can reduce power output by approximately 4.4% to 80%. Since PV panels are exposed outdoors year-round without any protective structure, their surface glass is constantly exposed to the air, making them susceptible to dust and dirt. Furthermore, most solar PV power plant sites are built in suburban areas, such as desert regions, where there are high dust levels and low rainfall. The power generation efficiency of PV panels is significantly reduced due to dust cover and other factors, resulting in an annual power loss of approximately 50 billion kWh. To mitigate these losses, the glass industry is actively researching ways to reduce the impact of dust and dirt on PV module power generation. Because the PV glass is on the outermost surface of the PV module, dust and dirt tend to accumulate on its surface, thus affecting the power generation of the solar panel. The main components of photovoltaic glass in traditional photovoltaic panels include quartz sand, soda ash, limestone, dolomite, sodium nitrate, mirabilite, sodium pyroantimonate, aluminum hydroxide, etc. Their composition does not have "superhydrophilic" or "superhydrophobic" properties, so they cannot achieve self-cleaning function.

[0004] Coated glass is made by depositing one or more layers of metal, alloy, or metal compound on the surface of glass, thereby altering the glass's properties. Currently, the most common types of coated glass on the market include: heat-reflective coated glass, Low-E coated glass, glass for large-area art mirrors, nano self-cleaning glass, low-reflection coated glass, high-reflection coated glass, one-way vision glass, ITO conductive film glass, thermochromic coated glass, and photovoltaic glass.

[0005] Chinese patent document CN205990345U discloses a high-transmittance coated glass that maintains good light transmittance. This coated glass includes glass and a light-transmitting substrate. The substrate is surrounded by a first aluminum-silicon layer, a first nickel-chromium layer, a silver layer, a second nickel-chromium layer, and a second aluminum-silicon layer. The thickness of both the first and second nickel-chromium layers is 0.4mm-0.8mm. A titanium oxide layer is disposed between each of the first, silver, and second nickel-chromium layers. This high-transmittance coated glass uses nickel-chromium and silver materials, which reduce light transmittance. It is only suitable for glass with low light transmittance requirements and is unsuitable for photovoltaic glass, which requires high transmittance, as it would severely affect the light transmittance.

[0006] Chinese patent document CN205774113U discloses a solar module coated glass with strong hydrophilicity, comprising a glass substrate, a composite coated glass antireflective layer, and a silica coating. The composite coated glass antireflective layer is attached to the glass substrate, and the silica coating is formed on the composite coated glass antireflective layer using a sol-gel method. The composite coated glass antireflective layer contains a porous structure layer, and the silica coating contains multiple pores. This technology uses a sol-gel method to deposit a dense and strongly hydrophilic silica layer. Although this can prevent oil stains from easily adsorbing onto the hydrophilic coated glass surface, solving the problem of difficult-to-clean oil stains deposited in the air, the porous structure of the silica coating still results in some blocking portions. These blocking portions hinder light transmission. Moreover, in existing technologies, double-layer coated glass has a higher light transmittance than single-layer coated glass. Therefore, the practical application effect of this technology is not ideal. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an anti-reflective self-cleaning coated glass that not only has excellent light transmission performance but also dustproof and self-cleaning capabilities, as well as its preparation method and application.

[0008] The present invention addresses two main technical problems: First, the working principle of a photovoltaic (PV) power generation panel is that solar cells absorb sunlight to generate electricity. The core component is the solar cell, while the photovoltaic glass is located on the outermost layer of the panel, primarily serving to protect and transmit light. However, the light transmittance of the photovoltaic glass itself significantly affects the power generation performance of the solar cells. Currently, the maximum light transmittance of photovoltaic glass on the market is 93%-94%, still resulting in 6%-7% light transmission through the solar cells. Second, most solar photovoltaic power station bases are built in suburban areas, and the photovoltaic panels themselves lack anti-fouling and self-cleaning functions, leading to a significant reduction in power generation efficiency due to factors such as dust accumulation.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0010] A method for preparing antireflective self-cleaning coated glass includes the following steps:

[0011] (1) Disperse organosilicon in ethanol and stir, adjust the pH value to 8-11, and react at 50℃-70℃. After the reaction, age to obtain nano-SiO2 colloidal template.

[0012] (2) Mix the metal salt, ligand and solvent, and carry out a hydrothermal reaction at a temperature of 90℃~150℃ and a pressure of 0.07MPa~0.5MPa to obtain MOF crystals;

[0013] (3) Mix MOF crystals with nano-SiO2 colloidal template, add catalyst, react at 60℃~80℃ to form a shell-core structure, place and age, add modified waterborne acrylic polyurethane and silane coupling agent containing hydrophilic anionic groups to the obtained reaction solution, stir evenly, keep the temperature at 60℃~80℃ to form a coating solution.

[0014] (4) The glass substrate is pretreated, and the coating solution is coated on the pretreated glass substrate by roller coating. After drying, curing and cooling, an anti-reflective self-cleaning composite organic coating is formed on the glass substrate. After post-treatment, anti-reflective self-cleaning coated glass is obtained.

[0015] In the above-mentioned method for preparing antireflective self-cleaning coated glass, preferably, in step (1), the mass-volume ratio of the organosilicon to ethanol is 2.1g~3.2g∶80mL~120mL, the pH value is adjusted using ammonia water, the reaction time is 6h~10h, and the aging time is 2 days~5 days.

[0016] In the above-mentioned method for preparing antireflective self-cleaning coated glass, preferably, in step (2), the metal salt includes one or more of sulfate, nitrate, chloride and perchlorate, the ligand is bipyridine, triphenylamine tricarboxylate or terephthalic acid, the solvent includes N,N-dimethylformamide and / or methanol, the molar ratio of the metal salt, ligand and solvent is 5-7:1.5-3:45-55, and the hydrothermal reaction time is 12h-48h.

[0017] In the above-mentioned method for preparing antireflective self-cleaning coated glass, preferably, in step (3), the ratio of MOF crystals, nano-SiO2 colloidal template, and catalyst is 3.4g~5.6g∶90mL~140mL∶30mL~50mL, the catalyst is sodium hydroxide solution, and the concentration of the sodium hydroxide solution is 0.6mol / L~1.2mol / L; the aging time is 2 days~3 days.

[0018] In the above-mentioned method for preparing antireflective self-cleaning coated glass, preferably, in step (3), the modified waterborne acrylic polyurethane containing hydrophilic anionic groups is high molecular weight epoxy resin modified polyurethane acrylate WDS-8056 or epoxy resin dendritic toughening modifier CYD-T60, and the silane coupling agent is vinyltriethoxysilane A151, vinyltrimethoxysilane A171 or vinyltri(β-methoxyethoxy)silane A172; the mass of the high-temperature resistant modified waterborne acrylic polyurethane is 2.8 to 3.5 times the mass of the reaction solution, and the mass of the silane coupling agent is 0.8 to 1.2 times the mass of the reaction solution.

[0019] In the preferred method for preparing the above-mentioned antireflective self-cleaning coated glass, in step (4) of the roller coating method, the rotation speed of the roller coating roller is 4.5 m / s to 5.3 m / s, the coating solution is diluted with water to a mass fraction of 94% to 98% (coating solution / (coating solution + water)), the conveyor belt speed is 7.5 m / s to 8.2 m / s, and the coating thickness is controlled at 110 nm to 160 nm.

[0020] In the preferred embodiment of the above-mentioned method for preparing antireflective self-cleaning coated glass, step (4) includes the following pretreatment steps: edge grinding, cleaning, and preheating of the glass substrate, wherein the preheating temperature is 30℃~50℃ and the preheating time is 30s~50s; the drying and curing temperature is 100℃~300℃ and the drying and curing time is 2min~3min; the posttreatment includes tempering, secondary cleaning, inspection, backing paper, and unloading, wherein the tempering temperature is 650℃~750℃, the secondary cleaning temperature is 38℃~53℃ and the secondary cleaning time is 100s~200s; and the coating is carried out in a coating room, wherein the temperature of the coating room is controlled at 20℃~26℃ and the relative humidity is controlled at 30%~50%.

[0021] As a general technical concept, the present invention also provides an antireflective self-cleaning coated glass prepared by the above-mentioned preparation method, comprising a glass substrate and an antireflective self-cleaning composite organic coating disposed on the glass substrate.

[0022] Preferably, the antireflective self-cleaning coated glass has a light transmittance of 96% to 97.5% and a contact angle of 1° to 3°.

[0023] As a general technical concept, the present invention also provides an application of the above-mentioned antireflective self-cleaning coated glass in the field of photovoltaic power generation.

[0024] Regarding antireflection and anti-reflection coatings for solar panels: (a) On the one hand, from the perspective of the principle of light propagation on a plane, the working principle of antireflection coatings is based on the principle of thin-film interference. If the optical thickness of the film layer is one-quarter of a certain wavelength (nld = λ / 4), the optical path difference between two adjacent beams is exactly π, that is, the vibration directions are opposite. The superposition result reduces the reflected light of that wavelength on the optical surface, thereby increasing the light transmittance. On uncoated glass, the light energy reflected at the air-glass interface accounts for 4% of the total incident energy each time, and the transmitted light energy is 96%. A piece of glass reflects twice: the transmitted light energy is about 92%. Such thin films are represented by SiO2. (b) On the other hand, different micro / nano surface structures on the glass surface extend the light path, promote the diffuse reflection light to pass through and form an effective gradient refractive index distribution between the air and the substrate, thereby achieving the effect of antireflection and anti-reflection. The application of micro / nano antireflective coatings on the surface of solar cells overcomes Fresnel reflection loss. This is because micro / nano patterning increases the surface area and appearance ratio, improves antireflection and hydrophobic deposition over a wide wavelength range, and the micro / nano layer on the appearance increases the contact area between the glass and light. At the same time, by changing the direction of light propagation, it exhibits a better antireflective effect than a flat surface.

[0025] Regarding self-cleaning films for solar panels, researchers hold two main opinions. One is to coat the surface with a superhydrophilic film, which allows water to easily penetrate to the bottom of the dirt, float it up, and wash it away without leaving scale or rain streaks. The other view is the "lotus effect," or superhydrophobic effect. The lotus effect can be seen in other plants and insects, which have evolved self-cleaning surfaces, such as water droplets on rice, leaves, sarcodile, butterfly wings, fish scales, and shark skin. The contact angle of water droplets on their surface is greater than 150°. Once they come into contact, they bead up and roll off, carrying away surface dust.

[0026] The purpose of this invention is to prepare an anti-reflective, self-cleaning coated glass, primarily to achieve anti-reflective and stain-resistant properties for photovoltaic glass. The SiO2 raw material used in this invention is similar to the main components of glass, and SiO2 has a low refractive index. Its reflectivity typically increases with the angle of incidence of light. According to the theory of thin-film interference, if a material with a lower refractive index than the glass is coated on the glass surface and meets the requirements of n... F =n G (n F Let n be the refractive index of the film. G (where the refractive index of the glass is λ) and the film thickness is h = λ / 4n F When λ is the wavelength, the reflectivity of the glass decreases. This invention utilizes MOFs materials, which possess excellent photosensitive properties and can self-assemble films at the molecular level. MOF crystals are grown on the surface of nano-SiO2, achieving a chain-like structure from photons to photocurrent, thus improving photoelectric conversion efficiency. Furthermore, by adding modified acrylic polyurethane and silane coupling agents to the coating solution, the hydrophilicity of the functional groups can be adjusted and enhanced, while the adhesion between the film and the glass substrate is strengthened, achieving self-cleaning properties of the coated glass and improved film adhesion.

[0027] This invention enables the preparation of self-cleaning coating materials that achieve high light transmittance and reduced dust adhesion. Using a roller coating method, a roller carrying the coating solution, passing above the coating machine belt, rotates in reverse to evenly coat the glass surface with the solution, achieving the coating effect. The film thickness can be adjusted by changing the roller speed, coating solution concentration, and conveyor belt speed to achieve high light transmittance in the photovoltaic glass. This invention's method achieves high light transmittance while maintaining anti-fouling and self-cleaning functions.

[0028] Compared with the prior art, the advantages of the present invention are as follows:

[0029] 1. The preparation method of this invention prepares an antireflective self-cleaning coated glass, mainly composed of a glass substrate and an antireflective self-cleaning composite organic coating. The antireflective self-cleaning composite organic coating is composed of nano-silica sol particles and a metal framework organic compound. Simultaneously, a specially selected high-temperature resistant modified waterborne acrylic polyurethane and a silane coupling agent are added to the composite solution. The antireflective self-cleaning composite organic coating is then deposited onto the glass substrate using a roller coating method to prepare the antireflective self-cleaning coated glass. The antireflective self-cleaning coated glass of this invention achieves improved overall performance through the synergistic effect of the following steps, particularly possessing both self-cleaning function and high light transmittance: 1) By adjusting parameters such as the ratio of organosilicon and ethanol, pH value, and reaction temperature, nano-silica sols with different sizes and particle size distributions are synthesized, which can adjust the surface roughness and light transmittance of the glass; 2) Transparent metal framework organic compounds (MOFs) with tunable band structure and hydrophilicity / hydrophobicity properties are used to change the surface state of the glass, thereby changing the hydrophilicity / hydrophobicity and light absorption rate of the glass surface; 3) Using a specially selected high-temperature resistant modified waterborne acrylic polyurethane, on the one hand... The modified polyurethane is photosensitive, capable of absorbing a wide range of light waves, and has good adhesive properties. Furthermore, the modified waterborne acrylic polyurethane contains hydrophilic groups, providing both viscosity and antistatic properties, ensuring the superhydrophilic characteristics of the coating solution, good adhesion during coating, and reducing the electrostatic adsorption capacity of the coated glass. Additionally, thermosetting enhances the hardness of the coating material. Finally, the addition of a silane coupling agent strengthens the adhesion between the glass and the film layer. 4) Using a roller coating method, the nano-silica sol components in the antireflective self-cleaning composite organic coating can be well distributed on the glass substrate surface, reducing light reflection in the coating and increasing light transmittance. Based on the synergy of the above steps, this invention can simultaneously achieve self-cleaning function and high light transmittance in coated glass. Encapsulating this coated glass onto a photovoltaic panel provides both high light transmittance and dustproof capabilities.

[0030] 2. The anti-reflective self-cleaning coated glass of the present invention comprises a glass substrate and an anti-reflective self-cleaning composite organic coating disposed on the glass substrate. This coated glass not only possesses high light transmittance but also exhibits superhydrophilicity on its surface, enabling self-cleaning. The present invention uses a glass substrate as the base material, employs roller coating technology to deposit the anti-reflective self-cleaning composite organic coating onto the surface, and then tempers it to achieve the anti-reflective and self-cleaning functions. Specifically, the preparation of the core-shell structure MOFs-SiO2 host material utilizes the photosensitive properties of MOFs materials and self-assembles the film layer at the molecular level, forming a chain structure from photons to photocurrent, thereby achieving high light transmittance of the coated glass. The coating solution of the present invention uses high-temperature modified waterborne acrylic polyurethane and silane coupling agent materials, which can enhance the adhesion and bonding between the glass and the coating. The anti-reflective self-cleaning coated glass of the present invention possesses both excellent anti-reflective and stain-resistant properties.

[0031] 3. The anti-reflective self-cleaning coated glass of the present invention combines a glass substrate and an anti-reflective self-cleaning composite organic coating, which not only increases the power generation efficiency of the photovoltaic product itself, but also suppresses the generation of static electricity on the substrate surface, making it difficult for stains to adhere to the substrate. Even if stains are attached, they can be self-cleaned when exposed to water, thus maintaining the light transmittance and cleanliness of the photovoltaic glass surface, reducing the efficiency degradation of crystalline silicon photovoltaic modules, and increasing the average power generation gain of photovoltaic modules by 3-5%. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the antireflective self-cleaning coated glass in Embodiment 1 of the present invention.

[0033] Figure 2 This is a flowchart of the preparation process of the coating solution in Embodiment 1 of the present invention.

[0034] Figure 3 This is a flowchart illustrating the preparation process of the antireflective self-cleaning coated glass in Embodiment 1 of the present invention.

[0035] Legend:

[0036] 1. Antireflective self-cleaning composite organic coating; 2. Glass substrate. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but this does not limit the scope of protection of the present invention. All materials and instruments used in the following embodiments are commercially available.

[0038] Example 1

[0039] A method for preparing antireflective self-cleaning coated glass according to the present invention, such as... Figure 2 and Figure 3 As shown, it includes the following steps:

[0040] (1) Organosilicon (specifically isopropyl orthosilicate) was dispersed in ethanol and stirred. The mass-volume ratio of organosilicon to ethanol was 2.5g:90mL. Ammonia was added to adjust the pH to 9. The reaction was carried out at 60℃ for 6h. Stirring was stopped and the mixture was aged for 2 days to obtain nano SiO2 colloidal template (nano SiO2 sol).

[0041] (2) Zn(NO3)2·6H2O, terephthalic acid and solvent N,N-dimethylformamide (DMF) were mixed in a molar ratio of 6:2:50 and placed in a stainless steel reactor lined with polytetrafluoroethylene. The hydrothermal reaction was carried out at a temperature of 120℃ and a pressure of 0.12MPa for 24 hours to obtain MOF crystals.

[0042] (3) Place MOFs crystals and nano-SiO2 colloidal templates into a reaction vessel and add 0.6 mol / L sodium hydroxide solution. The ratio of MOFs crystals, nano-SiO2 colloidal templates and sodium hydroxide solution is 3.8 g: 95 mL: 43 mL. In the reaction vessel, the temperature of the reaction solution is kept constant at 65 °C by the action of a catalyst, so that it undergoes a dehydration condensation reaction to form a core-shell structure with stable chemical bonds. Let it age for 2 to 3 days. Then add CYD-T60 modified waterborne acrylic polyurethane (a dendritic toughening modifier for epoxy resin) containing hydrophilic anionic groups (3.5 times the mass of the reaction solution) and silane coupling agent (specifically vinyltrimethoxysilane A171) (1.2 times the mass of the reaction solution) to the reaction solution. Stir evenly and keep the temperature at 70 °C to form a coating solution.

[0043] (4) The glass substrate is edge-ground, cleaned, and preheated at 45℃ for 35s. Then, the coating solution is applied to the glass substrate using a roller coating method. The coating is carried out in a coating room, where the temperature is controlled at 23℃, the relative humidity is controlled at 35%, the rotation speed of the roller coating roller is set to 4.9m / s, the coating solution is diluted with water to a mass fraction of 96.3%, the conveyor belt speed is 8m / s, and the coating thickness is controlled at 128nm. After drying and curing at 200℃ for 3min and cooling, an antireflective self-cleaning composite organic coating is formed on the glass substrate. After tempering at 700℃, secondary cleaning at 45℃ for 150s, inspection, backing paper, and unloading, the antireflective self-cleaning coated glass is obtained. Figure 1 As shown, the antireflective self-cleaning coated glass includes a glass substrate 2 and an antireflective self-cleaning composite organic coating 1 disposed on the glass substrate 2. The antireflective self-cleaning coated glass has a light transmittance of 97.3%, a contact angle of 2°, and increases the average power generation gain of photovoltaic modules by 4.5%.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the spirit and technical essence of the present invention. Therefore, any simple modifications, equivalent substitutions, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall still fall within the protection scope of the technical solutions of the present invention.

Claims

1. A method for preparing antireflective self-cleaning coated glass, characterized in that, Includes the following steps: (1) Disperse organosilicon in ethanol and stir, adjust the pH value to 8-11, react at 50℃-70℃, and age after reaction to obtain nano-SiO2 colloidal template; the mass-volume ratio of organosilicon to ethanol is 2.1g-3.2g:80mL-120mL; (2) Mix the metal salt, ligand and solvent and carry out a hydrothermal reaction at a temperature of 90℃~150℃ and a pressure of 0.07MPa~0.5MPa to obtain MOF crystals; (3) Mix MOF crystals with nano-SiO2 colloidal template, add catalyst, react at 60℃~80℃ to form a shell-core structure, place and age, add modified waterborne acrylic polyurethane and silane coupling agent containing hydrophilic anionic groups to the obtained reaction solution, stir evenly, keep the temperature at 60℃~80℃ to form a coating solution. (4) The glass substrate is pretreated, and the coating solution is coated on the pretreated glass substrate by roller coating. After drying, curing and cooling, an anti-reflective self-cleaning composite organic coating is formed on the glass substrate. After post-treatment, anti-reflective self-cleaning coated glass is obtained.

2. The method for preparing antireflective self-cleaning coated glass according to claim 1, characterized in that, In step (1), the pH value is adjusted using ammonia water, the reaction time is 6h to 10h, and the aging time is 2 days to 5 days.

3. The method for preparing antireflective self-cleaning coated glass according to claim 1, characterized in that, In step (2), the metal salt includes one or more of sulfate, nitrate, chloride and perchlorate, the ligand is bipyridine, triphenylamine tricarboxylate or terephthalic acid, the solvent includes N,N-dimethylformamide and / or methanol, the molar ratio of the metal salt, ligand and solvent is 5-7:1.5-3:45-55, and the hydrothermal reaction time is 12h-48h.

4. The method for preparing antireflective self-cleaning coated glass according to claim 1, characterized in that, In step (3), the ratio of MOF crystals, nano-SiO2 colloidal templates, and catalyst is 3.4g~5.6g∶90mL~140mL∶30mL~50mL, the catalyst is sodium hydroxide solution, and the concentration of the sodium hydroxide solution is 0.6mol / L~1.2mol / L; the aging time is 2 days~3 days.

5. The method for preparing antireflective self-cleaning coated glass according to any one of claims 1 to 4, characterized in that, In step (3), the silane coupling agent is vinyltriethoxysilane A151, vinyltrimethoxysilane A171, or vinyltri(β-methoxyethoxy)silane A172; the mass of the modified waterborne acrylic polyurethane containing hydrophilic anionic groups is 2.8 to 3.5 times the mass of the reaction solution, and the mass of the silane coupling agent is 0.8 to 1.2 times the mass of the reaction solution.

6. The method for preparing antireflective self-cleaning coated glass according to any one of claims 1 to 4, characterized in that, In step (4) of the roller coating method, the rotation speed of the roller coating roller is 4.5m / s to 5.3m / s, the coating solution is diluted with water to a mass fraction of 94% to 98%, the conveyor belt speed is 7.5m / s to 8.2m / s, and the coating thickness is controlled at 110nm to 160nm.

7. The method for preparing antireflective self-cleaning coated glass according to any one of claims 1 to 4, characterized in that, In step (4), the pretreatment includes edge grinding, cleaning, and preheating of the glass substrate. The preheating temperature is 30℃~50℃, and the preheating time is 30s~50s. The drying and curing temperature is 100℃~300℃, and the drying and curing time is 2min~3min. The posttreatment includes tempering, secondary cleaning, inspection, paper lining, and unloading. The tempering temperature is 650℃~750℃, the secondary cleaning temperature is 38℃~53℃, and the secondary cleaning time is 100s~200s. The coating is carried out in a coating room. The temperature of the coating room is controlled at 20℃~26℃, and the relative humidity is controlled at 30%~50%.

8. An antireflective self-cleaning coated glass prepared by the method described in any one of claims 1 to 7, characterized in that, It includes a glass substrate and an antireflective, self-cleaning composite organic coating disposed on the glass substrate.

9. The antireflective self-cleaning coated glass according to claim 8, characterized in that, The light transmittance of the antireflective self-cleaning coated glass is 96% to 97.5%, and the contact angle of the antireflective self-cleaning coated glass is 1° to 3°.

10. The application of the antireflective self-cleaning coated glass as described in claim 8 or 9 in the field of photovoltaic power generation.

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