Solar photovoltaic glass antireflection coating and preparation method thereof

Abstract

In the invention, organic silicon resin and silicate ester are hydrolyzed together under effects of a catalyst to form nano organic silicon particles; the nano organic silicon particles is then mixed with a compact silicon-oxygen structural body prepared by individually hydrolyzing the silicate ester; the mixture is then cured to form a stable and regular compact structure that inorganic silicon coats organic silicon. During tempering of the photovoltaic glass, the organic substances are oxidized to obtain CO2, and regular-sized nano pores are remained, which are disconnected from each other, and water vapor is isolated outside a film layer, so that the coating has excellent weather resistant performance. In addition, the film layer has a smooth surface and pollutants cannot enter the interior of the film layer, so that the coating has excellent pollution resistance. The preparation process is simple, is easy to control and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of new materials and new energy, and in particular relates to a solar photovoltaic glass anti-reflection coating and a preparation method thereof. Background technique [0002] Crystalline silicon solar cell modules are generally composed of solar photovoltaic glass cover plate coated with anti-reflection film, solar cell silicon wafer, battery back plate and EVA film, which are glued and pressed together, and then installed into a fixed frame. The most important factor determining the photoelectric conversion efficiency of crystalline silicon solar cells is the crystalline silicon technology in photovoltaic components, followed by the protection of photovoltaic glass in photovoltaic components. And it is one of the best materials with high light transmittance. Therefore, the optical properties of photovoltaic glass are an important variable outside of crystalline silicon technology. However, it is far easier to main...

AI Technical Summary

Problems solved by technology

However, the anti-reflection effect of the film layer of this structure is poor, and the weather resistance is poor.

[0007] The Chinese invention patent document with the publication number CN 103627226 A discloses a solar photovoltaic glass antireflection and antifouling coating and its production method. Silica shell, the silica particles in the coating have a core-shell structure, the formation of the silica core and the coating process of the silica shell proceed simultaneously, aluminum dihydrogen phosphate and silicon phosphate are used as silica curing agents to strengthen the anti-reflection film Weather resistance, thus solving the problem of contradictory anti-reflection and weather resistance indicators of existing solar photovoltaic glass anti-reflection coatings, but the process is complex and difficult to control, and is not suitable for mass production

[0008] At present, the anti-reflection film on the market has the following defects: 1. The light transmittance gain is not high, not exceeding 2.3%; 2. The weather resistance is not good, and the light transmittance attenuation of the weather resistance test such as wet freezing and humid heat can reach more than 0.7%; 3. Poor stain resistance, easy to be polluted by finger prints, silica gel, EVA glue in the production process, affecting the appearance and light transmittance of the film surface

However, the more pores in the film layer, the larger the hardness and adhesion fastness of the film layer will decrease.

At the same time, the pores communicate with each other, and there will be a large number of open pores on the surface. Water vapor will erode the glass surface through these pores. The soda-lime glass on the glass surface will be hydrolyzed slowly in the complex and harsh environment of humidity and heat for a long time, and the reaction will form silicic acid gel. And sodium hydroxide, the generated silicic acid gel adheres to the glass surface and affects the light transmittance, and the generated sodium hydroxide stays between the film layer and the glass substrate for a long time, which will further corrode the silicon dioxide film layer and the glass substrate

Due to the large number of open holes on the surface, the dust, oil in the air, felt, tape and silica gel in the component production process will enter the anti-reflection coating layer along with the small holes, thus affecting the performance of the anti-reflection coating. Transmittance