Solar cells are the first monocrystalline silicon solar cells. Silicon is a very rich element of the Earth, almost everywhere has the existence of silicon, can be said to be inexhaustible, Solar panel structures with silicon to make solar cells, raw materials are no shortage. But refining it is not easy, so people in the production of monocrystalline silicon solar cells at the same time, also studied polycrystalline silicon solar cells and amorphous solar cells, so far commercial-scale production of solar cells, has not jumped out of silicon series. In fact, there are many semiconductor materials for the manufacture of solar cells, with the development of the material industry, Solar panel structures the variety of solar cells will be more and more.
A solar cell is a device that responds to light and converts sunlight into electricity. There are many kinds of materials which can produce photovoltaic effect, such as: monocrystalline silicon, polysilicon, amorphous si, gallium arsenide, selenium and indium copper, etc. Their power generation principle is basically the same, and now crystalline silicon is an example to describe the process of light generation. Solar panel structures P-Type crystalline silicon can get N-type silicon through doped phosphorus, forming N junction.
When the light shines on the surface of the solar cell, some of the photons are absorbed by the silicon material; the energy of the photon is transferred to the silicon atom, which makes the electrons move more and more, becoming the free electrons in the n junction formed the potential difference, Solar panel structures when the external circuit is connected, under the action of the voltage, the current will flow through the external circuit to produce a certain output power. The essence of this process is: the process of converting photon energy into electricity.
A positive charge represents a silicon atom, and a negatively charged four electrons surround the silicon atom. The yellow indicates that the boron atom is doped, Solar panel structures because there are only 3 electrons around the boron atom, so the Blue Hole is produced.
When the P-type and N-type semiconductors are combined, Solar panel structures a special thin layer is formed in the junction area of the two semiconductors. The electrons in the N region will spread to the P area, and the holes in the P region will spread to n regions, and once the diffusion is formed a "internal electric field" of n pointing to P, thus preventing the diffusion. Until the balance is reached, a special thin layer forms a potential difference, which is the PN knot.
Application prospects of silicon-based solar cells at present, silicon-based batteries have been widely used in industry, agriculture, commerce, communications, Solar panel structures military, aviation and other fields. It also includes household appliances and utilities. The application of silicon-based batteries can be divided into 3 types: grid-connected, Off-grid and home appliance products.
Compared with the well network power generation, Solar panel structures the power generation has the characteristics of flexibility and so on, and always occupies the market share, such as the power supply for communication relay station and the power consumption in remote mountainous area. In many remote areas such as far away from the city of farms, mountainous areas, vineyards use of the network way to generate electricity, Solar panel structures such as water pump power supply system. Power can be up to $number. 3KW.
Solar camera. Japan produced the world's first solar camera, weighing only 475 grams, equipped with advanced solar cell systems, the battery can be used for 4 consecutive years. Solar panel structures A company in the United States has produced a new 135 camera. Its aperture, speed are controlled by micro-computer, electricity is provided by solar selenium photovoltaic cells, as long as there is light to power supply.