Polysilicon solar cells are favored for their rich raw materials, low cost, high conversion efficiency, good stability and other advantages, and also meet the needs of the society to occupy the main share of the solar cell market. Let's understand the principle of polysilicon solar panel power generation, and what are the application fields of polysilicon solar cell?
The solar panel is composed of white glass, EVA, anti-reflective layer, solar panel chip, EVA, TPT and outer frame from top to bottom.
Principle of polysilicon solar panel power generation
Solar cell chip is a semiconductor device with the photoelectric effect, current semiconductor PN junction is after the light, when light point-blank solar cell chip, absorbed the light stimulates the bound of high energy level of electrons, making it the free electrons, these free electrons within the crystal direction, the remaining holes (electronic) before. Holes also float around the crystal, free electrons (-) gather at the N junction, and holes (+) gather at the P junction. When the outer loop is closed, a current is generated.
Polysilicon solar cell application field
In order to reduce the production cost of solar level polysilicon, thus reduce the manufacturing cost of solar cells, and promote the development of solar photovoltaic industry, the application of polysilicon solar cells are as follows:
1. Solar power supply for users :(1) small power supply ranging from 10-100w is used for military and civilian living electricity in remote areas without electricity, such as plateau, islands, pastoral areas, border posts, etc., such as lighting, TV, radio recorder, etc.; (2) 3-5KW household roof grid-connected power generation system; (3) Photovoltaic water pump: to solve the deep water well drinking and irrigation in areas without electricity.
2, transportation field: such as beacon lights, traffic/railway signal lights, traffic warning/sign lights, Yuxiang street lights, high altitude obstacle lights, highway/railway wireless telephone booths, unattended road class power supply, etc.
3, communication/communication field: solar unattended microwave relay station, optical cable maintenance station, broadcast/communication/paging power supply system; Rural carrier phone photovoltaic system, small communicator, GPS power supply for soldiers, etc.
4. Petroleum, Marine and meteorological fields: petroleum pipeline and reservoir gate cathodic protection solar power supply system, oil drilling platform living and emergency power supply, Marine testing equipment, meteorological/hydrological observation equipment, etc.
5, household lighting power supply: such as garden lamp, street lamp, hand lamp, camping lamp, hiking lamp, fishing lamp, black light, rubber cutting lamp, energy-saving lamp, etc.
6, photovoltaic power station: 10KW-50MW independent photovoltaic power station, scenery (firewood) complementary power station, various large parking plant charging station, etc.
7. Solar architecture: it is a major development direction in the future to combine solar power generation with building materials so that large buildings in the future can achieve self-sufficiency in electricity.
8. Other fields include: (1) Supporting vehicles: solar cars/electric cars, battery charging equipment, automobile air conditioning, ventilation fans, cold drink boxes, etc.; (2) Solar hydrogen production and fuel cell regenerative power generation system; (3) Power supply for seawater desalination equipment; (4) Satellites, spacecraft, space solar power station, etc.