Precision coating
Selective emitter process: The thin, uniform application of dopants is critical to the successful formation of selective emitters on photovoltaic cells. Considerable effort is ongoing to improve the efficiency of photovoltaic cells. Recently, much attention has been given to the formation of selective emitters to significantly improve the efficiency of the solar cell. In a two-part series, Ultrasonic Systems President Stuart Erickson and Chinalight Solars Senior Engineer, Yang Song, Deputy Director of Research and Development, Ye Duan, and Deputy General Manager Youzhong Li elaborate.
One of the first steps in the manufacturing process of silicon photovoltaic cells is to form a p-n junction. This is accomplished by the thermal diffusion process in which a dopant is applied to the surface of the wafer and then the wafer is exposed to a high temperature of 900 to 1,000 degrees Celsius …
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