Self-cleaning anti-reflection film for solar cells

Abstract

The invention relates to the field of anti-reflective coatings, in particular to a solar cell anti-reflective coating. The self-cleaning solar cell anti-reflective coating is characterized in that transparent tempered glass serves as base materials, the anti-reflective coating comprises three coating bodies, namely the silicon dioxide coating body, the titanium dioxide coating body and the silicon dioxide coating body, the silicon dioxide coating body, the titanium dioxide coating body and the silicon dioxide coating body are sequentially arranged from the side close to the transparent tempered glass to the outside, the reference wavelength is the 800-nm wavelength, a sol-gel method is adopted for the silicon dioxide coating body close to the transparent tempered glass, the optical thickness of the silicon dioxide coating body is one fourth of the reference wavelength, magnetron sputtering coating is adopted for the titanium dioxide coating body, the optical thickness of the titanium dioxide coating body is a half of the reference wavelength, magnetron sputtering coating is adopted for the silicon dioxide coating body on the outer side, and the optical thickness of the silicon dioxide coating body is one fourth of the reference wavelength. According to the self-cleaning solar cell anti-reflective coating, the photocatalysis self-cleaning function of titanium dioxide and the hydrophobicity of nanoscale silicon dioxide are sufficiently used, the light conversion rate can be increased by 1%, the durability of the glass of the anti-reflective coating can be further improved, a solar cell panel can be easily applied outdoors for a long time, and the cost of solar power generation is greatly saved.

Description

technical field [0001] The invention relates to the field of anti-reflection films, in particular to an anti-reflection film for solar cells. Background technique [0002] Solar energy, as a clean and renewable new energy source, has attracted more and more attention from various countries. In order to improve the light wave absorption capacity in the range of 350-1000nm response range, solar panels are usually installed on the light-receiving surface of crystalline silicon wafers to cover Multi-layer anti-reflection film, in addition to protecting the fragile solar panel, a layer of transparent tempered glass is pasted on the solar panel with EVA film. [0003] Transparent tempered glass usually has a light transmittance of only about 90% at most, which virtually affects the power generation capacity of the solar panel. Therefore, it is necessary to install an anti-reflection film on the transparent tempered glass, and because the anti-reflection film on the tempered glass ...

AI Technical Summary

Problems solved by technology

[0003] Transparent tempered glass usually has a light transmittance of only about 90% at most, which virtually affects the power generation capacity of the solar panel. Therefore, it is necessary to install an anti-reflection film on the transparent tempered glass, and because the anti-reflection film on the tempered glass is exposed, the anti-reflection After the film is exposed to the sun and rain, it is easy to cause efficiency loss. When rain and dirt adhere to the surface of the tempered glass, it is not easy to clean. In addition, most of the existing anti-reflection films are in the visible light sensitive area, that is, the area around 550nm wavelength For the AR target area, not very suitable for working with solar panels