In fact, a photovoltaic cell is a semiconductor device with photo-electric conversion characteristics, which directly converts solar radiant energy into direct current, which is the most basic unit of photovoltaic power generation. The unique electrical properties of photovoltaic cells are based on the incorporation of certain elements (such as phosphorus or boron) into crystalline silicon to create a permanent imbalance in the molecular charge of the material, forming a semiconductor material with special electrical properties. Under sunlight, a free charge can be generated in a semiconductor having special electrical properties, and these free charges are directionally moved and accumulated to form an electromotive force at both ends thereof, and a current is generated when a conductor is closed at both ends thereof. This phenomenon is called “photovoltaic effect”, referred to as “photovoltaic effect.”
