The use of solar energy has actually appeared since ancient times. At that time, although it was not as possible to use high-tech means to realize the storage and multiple use of solar energy, it undoubtedly gave us inspiration in this regard. Modern solar panels are the more common thing, and there are many types of it.
Monocrystalline silicon solar panels
The photoelectric conversion efficiency of monocrystalline silicon solar panels is about 15%, and the highest is 24%, which is the highest photoelectric conversion efficiency among all kinds of solar panels, but the production cost is very large, so that it can not be widely used. Since monocrystalline silicon is generally encapsulated with tempered glass and waterproof resin, it is robust and durable, with a service life of up to 15 years and up to 25 years.
Polycrystalline silicon solar panels
The manufacturing process of polycrystalline silicon solar panels is similar to that of monocrystalline silicon solar panels, but the photoelectric conversion efficiency of polycrystalline silicon solar panels is much reduced, and its photoelectric conversion efficiency is about 12% (on July 1, 2004, Japan Sharp launched the world's high-efficiency polycrystalline silicon solar panels with an efficiency of 14.8%). In terms of production cost, it is cheaper than monocrystalline silicon solar panels, the material is easy to manufacture, saves electricity consumption, and the total production cost is low, so it has been developed a lot. In addition, polycrystalline silicon solar panels also have a shorter lifespan than monocrystalline solar panels. In terms of performance-to-price ratio, monocrystalline silicon solar panels are slightly better.
Amorphous silicon solar panels
Amorphous silicon solar panel is a new type of thin-film solar panel that appeared in 1976, it is completely different from the production method of monocrystalline silicon and polycrystalline silicon solar panel, the process is greatly simplified, the silicon material consumption is very small, the power consumption is lower, and its main advantage is that it can generate electricity in low light conditions. However, the main problem of amorphous silicon solar cell panels is that the photoelectric conversion efficiency is low, which is about 10% at the international advanced level, and it is not stable enough, and its conversion efficiency decays with the extension of time.
Multi-compound solar panels
Multi-compound solar panels refer to solar panels that are not made of a single element semiconductor material. There are many varieties studied in various countries, most of which have not yet been industrially produced, mainly as follows:
a) Cadmium sulfide solar panels
b) Gallium arsenide solar panels
c) Cu-indium selenium solar panels
The utilization technology of solar energy is constantly updated, and these endless monocrystalline solar panels, solar epoxy panels, and PET laminated solar panels are good proof that human beings will never stop in research and invention.
With the increase of population, the earth is facing a shortage of energy and a lack of energy types, and scientists are constantly looking for new energy sources. Solar energy has been used in our daily lives in the past, but the advent of solar panels has further expanded its use. So what is the principle of solar energy instead of generators? Solar panel manufacturers are here to tell you.
Under the action of the electric field of the p-n junction, the holes flow from the n-region to the p-region, and the electrons flow from the p-region to the n-region, and the current is formed after the circuit is turned on. This is how photoelectric effect solar cells work.
There are two ways of solar power generation, one is the light-heat-electricity conversion mode, and the other is the light-electricity direct conversion mode.
(1) The light-heat-electricity conversion mode generates electricity by using the heat energy generated by solar radiation, which is generally converted by the solar collector 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 thermal-electric conversion process.
(2) The light-electricity direct conversion method is to use the photoelectric effect to directly convert solar radiation energy into electrical energy, and the basic device of light-electricity conversion is the solar cell. A solar cell is a device that directly converts sunlight energy into electrical energy due to the photogenerated volt effect, and is a semiconductor photodiode, when sunlight shines on the photodiode, the photodiode will turn the sun's light energy into electrical energy and generate an electric current. When many cells are connected in series or parallel, they can become a solar cell array with relatively large output power.
Although the daily power generation of the power station has been very large, but still can not meet the needs of people, although the emergence of solar panels can not completely solve the problem of insufficient electricity, but to a certain extent is slowed down, and the use of solar power generation is a more environmentally friendly approach.