Organosilicone composition, reflecting coating, preparation method therefor and photovoltaic module comprising reflecting coating

Abstract

The invention relates to the field of preparation of photovoltaic cells and discloses an organosilicone composition, a reflecting coating, a preparation method therefor and a photovoltaic module comprising the reflecting coating. The organosilicone composition contains basic polymerization ingredients, a catalyst, a cross-linker and reflecting particles, wherein the basic polymerization ingredients, the catalyst and the cross-linker are not simultaneously mixed before use, the basic polymerization ingredients contain the ingredients in parts by weight: 100 parts of polymethyl siloxane, of which each molecule contains at least two Si-Vi bonds, 5-15 parts of hydrogenated epoxy resin or alicyclic epoxy resin modified hydroxyl-terminated polymethylvinylsiloxane and 10-20 parts of siloxane resin containing at least two Si-Vi bonds, and the cross-linker is polyorganosiloxane containing at least two Si-H bonds. According to the organosilicone composition, the adhesion of the reflecting coating can be improved while the curing time of the reflecting coating prepared from the organosilicone composition is shortened.

Description

technical field [0001] The invention relates to the field of photovoltaic cells, in particular to an organic silicon composition, a reflective coating and a preparation method thereof, and a photovoltaic module comprising the reflective coating. Background technique [0002] Photovoltaic cell modules (solar cell modules) are products that use the photovoltaic effect of semiconductors such as silicon to directly convert solar light into electrical energy through a P-N junction. In photovoltaic cell modules, when the back sheet is a transparent material, a reflective coating is usually used on the back sheet to reflect the light transmitted from the front to the back sheet back to the battery sheet to improve the utilization of sunlight, thereby improving the overall performance of the module. performance to ensure the safe and stable operation of the photovoltaic power generation system. [0003] At present, the reflective coating in the photovoltaic cell module is usually f...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the characteristics of the one-component condensation type silica gel itself, its application also has the following problems: ①The deep curing is slow, and it takes more than 24 hours to cure 5mm; ②The glue is paste-like, with high viscosity, and it is difficult to control the thickness accurately during use; When the position of the coating is irregular, the construction is difficult, the consistency is poor, and the efficiency is low; ③ small molecules are released during curing, such as small molecules remaining in the coating will affect the coating performance;

[0004] In order to improve the above problems, researchers have also tried to choose two-component silica gel with faster speed. However, the bonding strength of this two-component silica gel is often far inferior to that of one-component condensation silica gel, which is easy to cause reflective coating. delamination, which is not conducive to production application

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