Solar photovoltaic energy is part of the use of sunlight. What is commonly called photovoltaic technology can also be considered solar cell technology.
Solar cells use the photoelectric effect inside a semiconductor. When sunlight shines on a semiconductor called a "P-N junction", light with extremely short wavelengths is easily absorbed inside the semiconductor and collides with the "valence". "Electrons" in silicon atoms cause the "valence electrons" to gain energy and become free electrons to escape from the crystal lattice, thus generating a flow of electrons.
Commonly used solar cells can be divided according to their materials: crystalline silicon cells, cadmium sulfide cells, antimony sulfide cells, gal arsenide cellslium, amorphous silicon cells, selenium-indium copper cells, laminated series cells, etc.
Solar cells are lightweight, have no moving parts and are safe to use. The power output per unit mass is large, so it can be used as a small power source or combined into a large power plant. At present, its application has expanded from the aerospace field to all walks of life and thousands of homes. Solar cars, solar yachts, solar bicycles and solar airplanes have all appeared one after another. However, what is most attractive to humanity. is what we call the solar space station.
The creation of space solar power plants will undoubtedly completely improve the global energy situation, and humanity is looking forward to this day.
Advantages of solar cells:
Solar energy is inexhaustible
Esolar energy avoids power supply over long distances and can provide power nearby; p>The solar power generation system adopts modular installation and the construction period is short;
Solar power generation is safe and not affected by the energy crisis
Solar power generation is not moving; spare parts and easy to maintain;
No fuel, no waste, clean
Disadvantages of solar cells:
Solar energy production is limited by climatic conditions and is intermittent and must be equipped with an energy storage device;
The energy density is low and large-scale use requires a large area
The cost of energy production is high and the relative investment is large
Solar power generation, solar storage and solar cars. Plant photosynthesis requiressolar energy, and solar watches, solar computers, solar calculators, etc. all absorb solar energy via electronic panels. There are many things that can be done, mainly photoelectric or photothermal conversion. It goes without saying that photovoltaics are solar panels. Photothermal: such as water heaters, solar rice cookers, etc. There are many things that can be done, mainly photoelectric or photothermal conversion. It goes without saying that photovoltaics are solar panels. Photothermal: For example, solar water heaters, rice cookers, etc. Solar power generation, solar power storage, solar cars, plant photosynthesis require solar power, and solar watches, solar computers, solar calculators, etc. require solar power. all absorb solar energy via electronic panels. .