1) The light-heat-dynamic-electric conversion method uses the thermal energy generated by solar radiation to generate electricity. Generally, the solar heat collector converts the absorbed heat energy into the vapor of the working fluid, and then drives the steam turbine to generate electricity. The former process is the light-heat conversion process; the latter process is the heat-motion and then the final conversion process of electricity, which is the same as ordinary thermal power generation. The disadvantages of solar thermal power generation are low efficiency and high cost. It is estimated that its investment At least 5 to 10 times more expensive than ordinary thermal power stations.
(2) Light-to-electricity direct conversion method This method uses the photoelectric effect to directly convert solar radiant energy into electrical energy. The basic device of light-to-electricity conversion is solar cells. A solar cell is a device that directly converts sunlight energy into electrical energy due to the photovoltaic effect. It is a semiconductor photodiode. When the sun shines on the photodiode, the photodiode will turn the sun`s light energy into electrical energy to produce Current. When many batteries are connected in series or in parallel, it can become a solar cell array with relatively large output power. Solar cells are a promising new type of power source, with three major advantages of permanence, cleanliness and flexibility. Solar cells have a long life. As long as the sun exists, solar cells can be invested once and used for a long time; compared with thermal power generation, Solar cells will not cause environmental pollution. 
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