The process of solar power generation is simple, with no mechanical rotating parts, no fuel consumption, no emissions of any substances including greenhouse gases, no noise, and no pollution; Solar energy resources are widely distributed and inexhaustible. Therefore, compared with new power generation technologies such as wind power, biomass power, and nuclear power, solar power generation is a renewable energy generation technology with ideal sustainable development characteristics, and has the following main advantages.

What kind of roof is suitable for installing photovoltaic solar energy? Can household photovoltaic power generation systems make money?

The main principle of photovoltaic power generation is the photoelectric effect of semiconductors. When photons are irradiated on metal, their energy can be completely absorbed by electrons in the metal. The energy absorbed by electrons is large enough to overcome the internal gravitational force of metals, escape from the metal surface, and become photoelectrons. If the outer layer of silicon has four electrons, it will become pure silicon; If pure silicon is doped with atoms with three external electrons, such as boron atoms, a p-type semiconductor is formed. When p-type and n-type are combined, the contact surface will form a potential difference and become a solar cell. When sunlight shines on the p-n junction, holes move from the n-pole region to the p-pole region.