Answer What are the raw materials for photovoltaic engineering modules?

Photovoltaic power generation systems are made of different materials, but all components include multi-layered materials, from the light-facing side to the backlit side. Sunlight first passes through the protective layer (usually glass) and then into the battery through the transparent contact layer. At the center of the component is the adsorption material, which absorbs photons and then completes the "photogenerated current". Semiconductor materials depend on the specific requirements of the photovoltaic system, and the raw materials for photovoltaic modules consist of eight main materials and production auxiliary materials.

Battery: A solar cell is a device that converts light energy directly into electrical energy. It is made of semiconductor materials. Electron-hole pairs are excited by sunlight and use the electrostatic field of the PN junction barrier region to separate electron-hole pairs. Electrons and separated holes are collected and sent out of the battery through electrodes, forming an electric current. Tinned copper strip: Oxygen-free copper cutting straightening, all external surfaces are hot-dip plated. Tinned tape is used to extract electrodes from solar cells and connect batteries during the manufacturing process of photovoltaic solar modules. Welding is required to have high operability, firmness and flexibility.

EVA: A copolymer of ethylene and vinyl acetate, is a hot melt adhesive. It is used to encapsulate the battery cell, prevent the external environment from affecting the electrical properties of the cell, improve the light transmittance of the photovoltaic module, and glue the battery cell, tempered glass and backplane together. Binding strength. The output electrical properties of the components have a gain effect. Back panel: used as a back protection packaging material, commonly used in T, TPE and PET doors, polyethylene structure. It is used to improve the anti-aging and corrosion resistance of photovoltaic modules and extend the service life of photovoltaic modules; The white backplane diffuses the incident light into the photovoltaic module, improving the light absorption efficiency of the photovoltaic module, and at the same time, due to its high infrared emissivity, it can also reduce the working temperature of the photovoltaic module; At the same time, the insulation performance of photovoltaic modules is improved.

Tempered glass: used to support the structure of photovoltaic modules, improve the lift and lift of photovoltaic modules, with light transmission, anti-glare, light transmission, waterproof, gasproof, corrosion resistance and other functions. Aluminum frame: The aluminum alloy frame installed by the glass epitaxial protects the edge of the glass, strengthens the sealing performance of the photovoltaic module, improves the overall mechanical strength of the photovoltaic module, and facilitates the installation and transportation of the photovoltaic module.

Silicone: Used to bond and seal laminated glass photovoltaic modules, junction boxes and backplanes to improve the UV resistance of photovoltaic modules. Junction box: The electrical connection device of the photovoltaic module plays the role of sealing and waterproofing the photovoltaic module lead and protecting the safety of the photovoltaic module system during operation.