The earliest solar cell is the monocrystalline silicon solar cell. Silicon is an extremely rich element of the earth, almost everywhere there is the existence of silicon, can be said to be inexhaustible, Solar panel structures with silicon to create solar cells, Solar panel structures raw materials can be described as no shortage. But it is not easy to extract it, so people in the production of monocrystalline silicon solar cells at the same time, but also the study of polysilicon solar cells and amorphous silicon solar cells, Solar panel structures commercial scale production of solar cells, Solar panel structures has not jumped out of the silicon series. In fact, for the manufacture of solar cells, a lot of semiconductor materials, with the development of the material industry, solar cell varieties will be more and more.
A solar cell is a device that responds to light and converts light energy into electricity. There are many kinds of materials to produce photovoltaic effect, Solar panel structures such as: monocrystalline silicon, Solar panel structures polycrystalline silicon, amorphous silicon, gallium arsenide, selenium and other copper. Their power generation principle is basically the same, now crystal silicon as an example to describe the light power generation process. P-type crystalline silicon doped with phosphorus can be N-type silicon, Solar panel structures the formation of P-N junction.
When the light is irradiated on the surface of the solar cell, a part of the photons are absorbed by the silicon material; the energy of the photon is transferred to the silicon atom, so that the electrons are moved and the free electrons are formed on both sides of the PN junction to form a potential difference. When the external circuit , Solar panel structures Under the action of this voltage, Solar panel structures there will be a current flowing through the external circuit to produce a certain output power. The essence of this process is the process of converting photon energy into electrical energy.
Silicon-based solar cell application prospects At present, silicon-based batteries have been widely used in industrial, agricultural, commercial, communications, Solar panel structures military, aviation and other fields. Including household appliances and utilities. Silicon-based battery applications can be divided into three types: grid-type, off-grid and home appliances.
Since the beginning of the 21st century, Solar panel structures the annual grid-connected capacity of solar photovoltaic power generation has increased by 44.1 times. From 287MW in 2000 to 29.85MW in 2008, the average annual growth rate of 60.99%, an increase of 72.65% in 2007. Solar panel structures Global solar photovoltaic grid-connected grid total growth of 10.5 times, from 2000 to 1.435G To 16.4GW in 2008, the annual growth rate of 35.6%. The world in the building and home roof application of solar cells, Solar panel structures the electricity can be connected to the network.
Compared with the grid power generation, off-grid power generation has the characteristics of flexibility, and always occupy the market share, such as for the communication of the relay station power supply, Solar panel structures remote mountainous areas of small power consumption and other occasions. Solar panel structures In many remote areas such as far away from the city's farms, mountainous areas, Solar panel structures vineyards use off-grid power generation, such as water supply systems. Power up to 441.3KW.