Tungsten Wire May Accelerate Popularity

A consortium of U.S. renewable energy developers plans to spend $6 billion on U.S.-made solar panels, buying up to 7 gigawatts of such batteries annually, more than a quarter of the nation’s installed base in 2021. It may accelerate the popularization of tungsten wire as the best cutting tool for silicon wafers at present. 

A solar panel is a device that directly or indirectly converts solar radiation energy into electrical energy through the photoelectric effect or photochemical effect by absorbing sunlight. Among them, the cell is one of the most important structural components in the device, and its quality, thickness and area will greatly affect the photoelectric conversion efficiency of the product.

At present, most of the solar cells on the market are made of crystalline silicon material. Therefore, the defects and impurities of the silicon wafer will directly affect the efficiency and stability of the battery; in addition, the appearance defects and appearance quality of the silicon wafer will also have a huge impact on the manufacture and appearance of the battery. According to Chinatungsten Intelligent Manufacturing, the main factor affecting the appearance quality of silicon wafers is the cutting process.

As one of the mainstream technologies for silicon wafer cutting, diamond wire (diamond wire) cutting technology has a faster-cutting speed, smaller wafer loss rate, higher cutting quality, and better cutting than traditional mortar cutting technology. Environmental protection and more economical advantages. However, this does not mean that diamond wire cutting technology does not have any disadvantages.

Under the background of the high price of silicon materials and the thinning of diamond wire, the shortcomings of the existing diamond cutting wire (using carbon steel wire as the busbar) are more obvious, such as large wire diameter, high wire breakage rate, and general anti-oxidation performance of the busbar, etc. . Generally speaking, the larger the wire diameter of the diamond wire, the higher the silicon material loss rate and the larger the thickness of the silicon wafer; the higher the wire breakage rate of the diamond wire, the lower the cutting efficiency and the worse the cutting quality; once the coating is damaged, the quality of the carbon steel wire will decline, which will seriously affect the service life of the diamond wire.

In order to make up for the lack of existing diamond wire, carbon steel wire is gradually replaced by ultra-fine tungsten wire. Compared with carbon steel wire, tungsten wire not only has the characteristics of better oxidation resistance and heat resistance but also can make cutting wire with a smaller diameter. This means that under the same factors as the quality of diamond powder and the coating process, the overall quality of tungsten wire diamond wire is better than that of carbon steel wire diamond wire, which is mainly reflected in longer service life, higher cutting quality, and higher yield rate, etc. . It is reported that the tungsten diamond wire manufactured by Dyele New Materials has begun to be shipped in small batches.

As one of the important cutting tools for silicon wafers, the demand for diamond wire will gradually increase with the expansion of the application scale of solar panels, which may make tungsten wire busbars popular in the field of diamond wire. Chinatungsten Online can provide high-quality tungsten wire for diamond wire busbar with a clean surface and reasonable price according to different manufacturing requirements.