Wide-spectrum anti-reflective ultraviolet shielding cover plate glass for double-glass component solar cell

Abstract

The invention discloses wide-spectrum anti-reflective ultraviolet shielding cover plate glass for a double-glass component solar cell. The wide-spectrum anti-reflective ultraviolet shielding cover plate glass comprises a rolled glass substrate; a mixed dielectric film layer and an acidic SiO2 film layer are sequentially laminated on a top surface of the rolled glass substrate; the mixed dielectricfilm layer is prepared by mixing a TiO2 sol and a SiO2 sol and coating a film; the molar ratio of TiO2 sol to SiO2 sol is 0.3:1-6:1; the acidic SiO2 film is prepared by coating the SiO2 sol; the pH of SiO2 sol is 2.0-5.0; the SiO2 solid content is 0.1-0.3%; the pH value of the TiO2 sol system is 2.0-5.0; the TiO2 solid content is 0.1-0.5%; a composite film base layer is formed by TiO2 and SiO2. The precise control of the refractive index of the film can be implemented through control of the component ratio; the acidic SiO2 on the upper layer guarantees the hardness and bonding force of the film; the transmittance in the wide spectrum range is effectively increased, meanwhile the transmittance of ultraviolet light can be effectively reduced and the ultraviolet shielding is implemented.

Description

technical field [0001] The invention relates to the technical field of solar photovoltaic glass, in particular to a wide-spectrum anti-reflection ultraviolet shielding cover glass for double-glass component solar cells. Background technique [0002] Solar double-glass modules require large optical transmittance to improve cell power generation efficiency. Currently, ultra-white SiO is used on a large scale 2 Anti-reflection glass is used as a battery cover, which can increase the transmittance of sunlight in the visible region, but at this time, the anti-reflection film is only for the visible region, and the spectral range is narrow, which improves the performance of the module but is limited. In order to achieve a wide spectrum The anti-reflection effect of the band increases the response range of the battery material to further improve the battery efficiency. A cover glass that can effectively increase the transmittance in a wide spectrum range is required. The double-lay...

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Problems solved by technology

[0003] The patent "A Preparation Method for Double-layer Composite Anti-reflection Film" (publication number CN103613282A) discloses a double-layer film system anti-reflection design, the bottom layer of which is TiO 2 with SiO 2 The hybrid film, the upper layer is an inorganic nano-silicon salt particle sol film, which realizes the anti-reflection of the film, but this invention only achieves a 6% increase in the transmittance in the visible light region, and does not clarify the broad-spectrum anti-reflection of the film system. The anti-reflection effect has not realized the function of the ultraviolet region, and the nanoparticle film on the upper layer is not conducive to the improvement of the film's binding force.

"Preparation method of double-layer low refractive index anti-reflection film" (public number CN104711551A) and "a high-strength double-layer anti-reflection film" (public number CN205752191U) disclose TiO 2 film with SiO 2 Anti-reflection film combined with a film, but this film is a combination of a single material, it is difficult to accurately control the refractive index of the film layer, so that although the film can achieve anti-reflection effect in a certain band, the spectral range of anti-reflection is difficult extended, even suppressed broad-wave light transmittance

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