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Traditional solar cell production process
Traditional solar cell production process In the past, we always described the manufacturing principles and silicon wafer processing technology. Today we will introduce the production technology of traditional solar cells. Traditional battery production can be mainly summarized into 6 steps. From the perspective of traditional battery manufacturing process, it can be summarized into the following six steps: 1) Cleaning and texturing, the main purpose is to remove various pollutants adsorbed on the surface of the silicon wafer, and remove the cutting damage layer on the surface of the silicon wafer; The light trapping principle is used to reduce the reflectivity of the battery surface. An uneven surface will increase secondary reflection, change the light path and incident method, increase the absorption of light, increase the short-circuit current, and thereby improve the conversion efficiency of the battery. Among them, due to the different crystal structures of monocrystalline silicon cells and polycrystalline silicon cells, taking into account efficiency factors, polycrystalline silicon cells are made of acid, and the textured surface is an irregular concave and convex surface; Monocrystalline silicon cells are made of an alkaline structure, and the textured surface is a regular pyramid structure; 2) Diffusion, the main purpose is to...
The boom of silicon wafers in the photovoltaic industry
The boom of silicon wafers in the photovoltaic industry Against the background of the carbon neutrality goal and the accelerated application of global clean energy, China’s photovoltaic industry as a whole has achieved rapid growth. According to corporate information and industry standard announcements from industry associations, the main links in the national photovoltaic industry chain have maintained strong development momentum, with a year-on-year growth rate of more than 45%. Among them, polysilicon increased by 53.4% year-on-year, silicon wafers increased by 45.5% year-on-year. Cells increased by 46.6% year-on-year, and modules increased by 54.1% year-on-year. Overseas photovoltaic market demand continues to be strong, and sales and prices have increased. In the first half of the year, module export volume reached 78.6GW, a year-on-year increase of 74.3%, and the total export volume of photovoltaic products was approximately US$2.59 billion, a year-on-year increase of 113.1%. The iteration of photovoltaic technology is accelerating, and the iteration of technical routes has promoted the upgrading of new generations of equipment and increased the value of equipment. Silicon wafers are developing in the direction of large size, and silicon wafers are developing in the direction of thinning. Large silicon wafer equipment will gradually undergo a large number of...
Diamond Wire Ring Saw Cutting NdFeB Magnets
Diamond Wire Ring Saw Cutting NdFeB Magnets Neodymium magnets, also known as NdFeB magnets, are tetragonal crystals formed from neodymium, iron, and boron (Neodymium 2 Iron 14B). This magnet is the second most magnetic permanent magnet available today after absolute zero holmium magnets. It is also the most commonly used rare earth magnet. NdFeB is divided into two types: sintered NdFeB and bonded NdFeB. Bonded NdFeB is magnetic in all directions and is corrosion-resistant; Sintered NdFeB is easy to corrode, and the surface needs electroplating. Generally, there are galvanized, nickel, environmentally friendly zinc, environmentally friendly nickel, nickel-copper-nickel, and environmentally friendly nickel-copper-nickel. Sintered NdFeB is generally divided into Axial magnetization and radial magnetization, determined according to the required working surface. For cutting large NdFeB magnets, many manufacturers use reciprocating long wire cutting, while small NdFeB magnets are cut with an inner diameter cutting machine. The cutting efficiency of the inner diameter cutting machine is low, but sometimes cutting a small amount of NdFeB magnets does not require opening Large machine. With the rise of diamond wire trepanation saws, some manufacturers began to use diamond wire trepanation saws to cut NdFeB. The cutting efficiency is 3 times that of the inner diameter...
Silicon carbide processing technology
Silicon carbide processing technology Silicon carbide wafers use high-purity silicon powder and high-purity carbon powder as raw materials, and use physical vapor transmission (PVT company) to grow silicon carbide crystals and process them into silicon carbide wafers. (1) Raw material synthesis. Mix high-purity silicon powder and high-purity carbon powder in a certain proportion, and the silicon carbide particles are reacted and synthesized at a high temperature of 2,000 °C. After crushing, cleaning and other processes, high-purity silicon carbide particles that meet the requirements of crystal growth are obtained. Silicon carbide micro powder raw material. (2) Crystal growth. Using high-purity silicon carbide powder as raw material, using an independently developed crystal growth furnace, silicon carbide crystals are grown using the physical vapor transport method (PVT method). Place high-purity silicon carbide powder and seed crystals at the bottom and top of a cylindrical sealed graphite crucible in a single crystal growth furnace, respectively. The crucible is heated to above 2000°C through electromagnetic induction, and the temperature at the seed crystal is controlled to be slightly lower than the temperature at the bottom of the micropowder, forming an axial temperature gradient in the crucible. Silicon carbide powder sublimates at high temperatures to form...
How to process silicon carbide?
How to process silicon carbide? Silicon carbide (sic) materials are the main development direction of the power semiconductor industry. Used in the manufacture of power devices, it can significantly improve power utilization. In the foreseeable future, new energy vehicles will be the main application scenario of silicon carbide power devices. As a technology pioneer, Tesla took the lead in integrating all-silicon carbide modules3 into Models, and other first-tier car companies are also planning to expand the application of silicon carbide. As the manufacturing cost of silicon carbide devices decreases and process technology gradually matures, silicon carbide The power device industry has broad prospects. What is silicon carbide? Silicon carbide (sic) is the third generation compound semiconductor material. The cornerstone of the semiconductor industry is chips. The core materials for manufacturing chips are divided into: First-generation semiconductor materials (mostly high-purity silicon is currently widely used), second-generation compound semiconductor materials (gallium arsenide, indium phosphide), and third-generation compound semiconductor materials (silicon carbide, gallium nitride). Due to its superior physical properties: high band gap (corresponding to high breakdown electric field and high power density), high electrical conductivity, and high thermal conductivity, silicon carbide will be the most widely used basic material for manufacturing semiconductor...
Silicon carbide wafer applications and future development trends
Silicon carbide wafer applications and future development trends Silicon carbide (sic) is the main development direction of the power semiconductor industry, and its application in power device manufacturing can significantly improve power utilization. In the foreseeable future, new energy vehicles will be the main application scenario of silicon carbide power devices . Compared with traditional silicon materials, silicon carbide is a typical representative of the third generation of semiconductor materials. It has the characteristics of wide bandwidth, high temperature resistance, high voltage resistance, high frequency, high power and radiation resistance. It has the advantages of fast switching speed and high efficiency, which can greatly reduce product power consumption, improve energy conversion efficiency, and reduce product volume. It will become the most widely used basic material for manufacturing semiconductor chips in the future. Silicon carbide wafer is a single wafer formed by cutting, grinding, polishing and cleaning silicon carbide crystals. As a semiconductor substrate material, silicon carbide wafer can be made into silicon carbide-based power devices and microwave radio frequency devices through epitaxial growth and device manufacturing. It is the first Important basic materials for the development of the third-generation semiconductor industry.

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