太陽電池製作を通して学ぶ半導体デバイスの基礎と再生可能エネルギー

抄録

In recent years, many students in electrical and environmental courses are familiar with the keyword "renewable energy," but do not fully understand, for example, the materials and structure of solar cells and the principles and characteristics of power generation. In response to this, we have conducted practical experiment using common equipment to fabricate solar cells and measure their characteristics, and have learned the fundamentals of solar cell and semiconductor device fabrication. A p-n junction was formed by doping P into a p-type Si substrate doped with B to create an n-type layer. In this process, doping was performed by forming a thin-film of PSG and then diffusing impurities through a thermal diffusion process. The characteristics of the solar cells were investigated by varying the amount of light exposure and diffusion time of impurities. Among the solar cells processed with thermal diffusion for 30 minutes, 1 hour, and 3 hours, the solar cell processed1 hour produced the highest amount of electricity. The amount of electricity generated can be checked by visually observing the rotation of the motor, in addition to measuring the electric power. Therefore, the characteristics of solar cells can also be understood sensitively. If workshops with a reduced level of difficulty are held for a wide range of people, many people will gain a more accurate understanding of photovoltaic power generation and semiconductor devices.