Solar cells, also known as photovoltaic cells, solar cell basic characteristics of the study of solar cells, also known as photovoltaic cells, referred to as photovoltaic cells. It is a device that directly converts the light energy of the sun or other light sources into electrical energy. Because of its light weight, safe use, and non-polluting characteristics, people have high hopes for solar cells under the current situation of global energy shortage and increasingly severe environmental protection. Solar cells are likely to become an important source of future electricity. The United States expects that solar power stations will provide 30% of the U.S. electricity by 2005. At the same time, solar cells also play an important role in modern detection and control technologies. Solar cells are used as power sources in satellites and spacecraft.