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According to the report of the Physicists Organization Network on June 25th, scientists at North Carolina State University in the United States stated that they can use Nano-Layer technology to create more “slim†thin-film solar cells without affecting their ability to absorb solar energy. At the same time, this will also significantly reduce the manufacturing cost of new batteries, and can be widely used in many other solar cell materials, such as cadmium telluride and copper indium gallium selenide (CIGS).
Cao Linyou, an assistant author of the paper's co-author and assistant professor of materials science and engineering at the university, said that they can use nano-sandwich technology to make solar cells with an ultra-thin active layer, for example, they can create a thickness of only 70 cells on the surface of the battery. Nanocrystalline amorphous silicon active layer. "This is a major improvement, because at present, ordinary thin-film solar cells using amorphous silicon are also used in the market. The active layer can reach 300 nm to 500 nm thick, and the active layer absorbs sunlight and converts it into solar cells. For the hero of electricity or chemical fuels."
Although new technology relies heavily on traditional manufacturing processes, the finished products are very different. First, a pattern is formed on the substrate by means of standard photolithographic techniques. This pattern can be used to depict the contour of a structure composed of a transparent dielectric material with a measurement value between 200 nanometers and 300 nanometers. Subsequently, the researchers will coat the substrate and nanostructures with a thin layer of amorphous silicon active material, and will coat the outer layer of the active layer with another layer of dielectric material. Cao Linyou said that an important aspect of this technology is the nano sandwich design, which allows the active material to be located between two dielectric layers. Nanostructures can be used as a very effective optical antenna to concentrate solar energy on active materials. This means that scientists can use a thinner active layer to build solar cells without affecting the efficiency of the cell, thus solving the problem that the thinning of the active layer in traditional thin-film solar cells will impair the energy efficiency of the cell. (Zhang Hao)
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