Can people assume that solar energy can be directly converted into electrical energy for our use?
After long-term research by scientists, the world’s first photocell was successfully developed in 1954. The establishment of the photoelectric effect theory and the advent of semiconductor materials have promoted the research and development of solar cells. By far the most common are silicon solar cells.
Compared with other batteries, the structure of silicon solar cells is simple. The main part is a silicon wafer as thin as paper. Some boron elements are uniformly doped on one side of it, and some phosphorus elements are evenly doped on the other side, and then Attaching cells to both sides of these thin silicon wafers creates a silicon solar cell.
Under the irradiation of sunlight, an electromotive force will be generated between the two electrodes. After the electrical appliance is connected, it can supply power to the electrical appliance.
Silicon solar cells do not need fuel, nor do they need bulky and complicated equipment. They are light, small and convenient, and can easily convert about 15% of the sunlight irradiated on them into electrical energy. It should be said that solar cells are very ideal power sources. .
In daily life, some electronic calculators used by students use photoelectric cells as power sources. As long as there is sufficient light, the calculator can work and does not require regular battery replacement.
Solar cells have been applied to artificial earth satellites, which directly use solar energy in space to obtain electrical energy and provide energy for various instruments and meters.
Extensive direct use of solar energy into electrical energy, allowing easy-to-clean, durable solar cells to enter family life, will surely become a reality in the near future.
Post time: Dec-12-2022