Photovoltaic power generation is a technique that utilizes the photovoltage effect of the semiconductor interface to convert light energy directly into electrical energy. Mainly by the solar panels (components), the controller and the inverter composed of three major components, the main components from the electronic components. Solar cells through the series after the package protection can form a large area of the solar cell components, and then with the power controller and other components to form a photovoltaic power generation device.
The main principle of photovoltaic power generation is the photoelectric effect of the semiconductor. When the photon is irradiated onto the metal, its energy can be absorbed by an electron in the metal, and the energy absorbed by the electrons is large enough to overcome the internal gravity of the metal and leave the metal surface to escape and become optoelectronics. Silicon atoms have four outer electrons, if the pure silicon doped with five atoms in the outer layer of atoms such as phosphorus atoms, become N-type semiconductor; if the pure silicon doped with three atoms in the outer electrons such as Boron atoms to form P-type semiconductors. When the P-type and N-type together, the contact surface will form a potential difference, a solar cell. When the sunlight is irradiated to the P-N junction, the holes move from the P-polar region to the N-polar region, and the electrons move from the N-polar region to the P-polar region to form a current.