Monocrystalline silicon solar cells, based on high-purity silicon rods for the raw material of solar cells, is currently the fastest growing developed a solar cell. Its structure and production process has been finalized, the products have been widely used for space and ground.
In order to reduce production costs, the ground application of solar cells using solar grade silicon rods, a relaxation of material performance. Some can also use the materials and discard ends of the semiconductor device processing of silicon materials for solar cells made through the complex pull of silicon rods. Silicon rods cut into pieces, generally 0.3 mm thick film. Silicon wafer after polishing, cleaning processes, made from raw materials to be processed silicon wafers. Processing of solar cells, first in the silicon doping and diffusion, generally doped material for trace amounts of boron, phosphorus, antimony. The diffusion is carried out in a quartz tube, high temperature diffusion furnace. So that the formation of P> N junction silicon. And then using the screen printing method, refined with a good paste made of printed silicon gate line, after sintering, and made the back electrode and the gate line of the surface coating, antireflection source to prevent a large number of photons out of a smooth silicon surface reflectance. Therefore, the monomer film of monocrystalline silicon solar cells are produced. Monomer piece after a random inspection, you can according to the required specifications will be assembled into solar modules (solar panels), constitute some of the output voltage and current using the method of series and parallel. Finally, the framework and materials package. User according to the design of the system can be solar modules composed of a variety of different sized solar cell matrix, also known as the solar array. The photoelectric conversion efficiency of silicon solar cells for about 15%, laboratory results more than 20%.
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