1. Characteristics and functions of silicone materials
Silicone materials come in various forms, including small molecular compounds, flowable liquid polymers, elastic silicone rubbers, hard silicone resins and coatings. Most organosilicon polymers have a silicate-like polymer backbone with organic groups on their side chains. Such semi-inorganic and semi-organic special polymer structure endows silicone materials with a series of excellent properties such as high temperature and low temperature resistance, weathering resistance, water repellency and moisture resistance, high dielectric strength and low dielectric loss, optical transparency, safety and non-toxicity.

Therefore, silicone materials are not only suitable for applications in various occasions, but also can be used in harsh environments that general-purpose synthetic materials cannot withstand. Used as a supporting material for solar power generation devices that work in outdoor conditions for a long time, silicone products show unparalleled superior performance.

2. Organic silicon materials for supporting applications in the field of solar power generation
Silicone products are excellent heat-resistant electrical insulating materials, which are widely used in general power generation, substation, transmission and other strong power applications. In the construction and safe operation of solar power generation devices, organic silicon materials are often irreplaceable and important supporting materials. The following is a brief list of organosilicon materials specially used in solar power generation devices.

1. Organic silicon materials for solar cell systems
The solar photovoltaic power generation device is installed outdoors. In the natural environment that changes in four seasons, it is required to withstand harsh natural conditions such as long-term sunlight, high and low temperature cycles, wind and rain erosion, dust and gravel erosion. Materials for solar cells must meet specific application requirements such as weather resistance and long-term performance stability.

The key points of organic silicon materials and related technologies used in the assembly of solar cells are described as follows:

One-component RTV silicone rubber for solar cell bonding and sealing:
One-component RTV silicone rubber can be used as frame sealant for solar cells, junction box sealant, busbar sealant, thin film module bracket adhesive, etc. The one-component RTV silicone rubber suitable for bonding and sealing of solar cells is a neutral silicone rubber to protect the battery chip from pollution and corrosion, and at the same time, the vulcanized silicone rubber is required to have flame retardant properties.

Solar cell chip surface anti-reflection coating material:
Silica sol or silane treatment should be applied to the surface of the battery chip to generate an anti-reflection film to improve the solar cell's light absorption efficiency.

Protective film on the light-transmitting surface of solar cell modules:
An organosilicon coating is applied on the light-transmitting surface of the solar cell module to protect the cell surface from damage from external factors and improve the efficiency of receiving light. The suitable silicone coating is a special coating based on silicone resin, which requires rapid curing at room temperature. The cured film layer should have an appropriately high refractive index and adhere firmly to the substrate.

Filling and bonding materials for solar cell module assembly:
In the solar cell module, transparent materials should be filled around the chip to be bonded and fixed. In the past, EVA material was mostly used for hot melt filling. During the power generation operation, EVA yellowing, light transmittance reduction and debonding often occurred, resulting in battery Power generation efficiency is reduced. In order to prolong the working life of photovoltaic cells and improve the power generation efficiency, it is a scientific and reasonable choice to use liquid silicone rubber to fill and bond, especially the application of addition type liquid silicone rubber to fill and encapsulate solar cell modules will achieve the best results. To research and develop addition-type liquid silicone rubber suitable for filling and encapsulating photovoltaic cells, it is necessary to solve the technical key to ensure high light transmittance and reliable bonding performance of silicone rubber.

2. Organic silicon materials for solar thermal power generation systems
Examples of silicone materials for special applications in solar thermal power generation systems are as follows:

High temperature heat transfer medium silicone oil for solar thermal power generation system:
In order to improve the power generation efficiency, the working temperature of the heat transfer medium of the solar thermal power generation system is as high as 400 ℃. The general-purpose heat transfer oil not only cannot meet the requirements of safe working temperature, but also the heat transfer oil will be broken due to mechanical shearing during long-term pumping operation. lead to a decrease in heat resistance. Silicone oil with semi-inorganic and semi-organic polymer structure has excellent heat resistance and shear resistance of polymer molecules, and can be used as a heat transfer medium for photothermal power generation. Benzyl silicone oil with a specific structure not only has heat resistance and shear resistance Excellent, especially with outstanding thermal oxidation resistance. At the same time, additives such as thermal stabilizers are introduced to further improve the thermal stability of silicone oil. The use of phenylmethyl silicone oil as a high-efficiency heat transfer medium can ensure long-term stable operation of the CSP system.

Heat-resistant and weather-resistant silicone coatings for solar thermal power generation structures:
Solar thermal power generation structures should be exposed to strong light for a long time and work in high temperature environment, and their metal components must be protected by coating with high heat-resistant and high-weather-resistant coatings. General heat-resistant and weather-resistant coatings are difficult to meet the harsh application requirements of CSP. Methyl phenyl silicone resin has excellent heat and weather resistance, and can be used as a protective coating for photothermal power generation structures by applying silicone coatings with silicone resins as substrates.

The key to researching and developing heat-resistant and weather-resistant protective coatings for CSP structures is to synthesize silicone resins with high curing activity. Because general-purpose methylphenyl silicone resins generally have defects such as low curing activity, low adhesion strength of the cured paint film to the substrate, and easy re-adhesion of the cured paint film, coatings made from general-purpose silicone resins cannot Fully meet the supporting needs of CSP. The high-curing active silicone resin catalyzed and synthesized by the nucleophilic reaction catalyst can not only catalyze cross-linking and curing at room temperature, but also the cured coating film and the substrate are firmly bonded, and the cured paint film will never stick back. The high heat-resistant and high-weather-resistant silicone coating with high curing activity silicone resin as the base material can be used as an excellent coating protective coating for building structures such as solar thermal power generation towers.