Solar power is divided into solar thermal power generation and photovoltaic power generation. Generally speaking, solar power refers to solar photovoltaic power generation, referred to as "photovoltaic". Photovoltaic power generation is a technology that directly converts light energy into electrical energy by utilizing the photovoltaic effect of the semiconductor interface. The key component of this technology is the solar cell. The solar cells are packaged and protected in series to form a large-area solar cell module, and then combined with a power controller and other components to form a photovoltaic power generation device.
In theory, photovoltaic power generation technology can be used in any occasion where power is required, from spacecraft, down to household power, to megawatt power stations, small to toys, and photovoltaic power everywhere. The most basic components of solar photovoltaic power generation are solar cells (sheets), such as monocrystalline silicon, polycrystalline silicon, amorphous silicon and thin film batteries. Among them, single crystal and polycrystalline batteries have the largest amount, and amorphous batteries are used for some small systems and calculator auxiliary power supplies. The efficiency of Chinese domestic crystalline silicon cells is about 10 to 13%, and the efficiency of similar products in the world is about 12 to 14%. A solar panel consisting of one or more solar cells is referred to as a photovoltaic component. Photovoltaic power generation products are mainly used in three aspects: one is to provide power for non-electrical occasions; the other is solar energy daily electronic products, such as various types of solar chargers, solar street lamps and solar lawns, etc.; This has been widely implemented in developed countries. By 2009, China's grid-connected power generation has not yet begun to be fully promoted. However, part of the 2008 Beijing Olympic Games was powered by solar power and wind power.
It is predicted that solar photovoltaic power generation will occupy an important seat in the world's energy consumption in the 21st century, not only to replace some of the conventional energy, but also to become the main body of the world's energy supply. It is estimated that by 2030, renewable energy will account for more than 30% of the total energy structure, and solar photovoltaic power generation will account for more than 10% of the world's total electricity supply; by 2040, renewable energy will account for the total More than 50% of energy consumption, solar photovoltaic power generation will account for more than 20% of total electricity; by the end of the 21st century, renewable energy will account for more than 80% of the energy structure, and solar power will account for more than 60%. These figures are sufficient to show the development prospects of the solar photovoltaic industry and its important strategic position in the energy field.
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