Where is the most efficient outdoor solar lamp?
时间:2019-01-11 浏览:2756次

Introduction: Many people have many outdoor solar lights in their homes, but do you know how to put solar lights right? The photoelectric conversion of the solar floodlights we purchased relied mainly on solar panels. The connection between the solar panel and the battery is based on semiconductors. Semiconductors have their special characteristics.

    Solid materials can be classified into three types: conductors, insulators, and semiconductors according to their conductivity. An object with strong electrical conductivity is called a conductor, such as gold, silver, copper, iron, aluminum, etc., and its resistivity is in the range of 10^-8~10^-6 Ω·m.

    An object with weak or substantially non-conductive properties is called an insulator, such as rubber, plastic, wood, glass, etc., and its resistivity is in the range of 10^8~10^20 Ω·m. An object whose electrical conductivity is between a conductor and an insulator is called a semiconductor, such as germanium, silicon, gallium arsenide, cadmium sulfide, etc., and its resistivity is about 10^-5~10^7 Ω·m. The difference between semiconductor materials and conductors and insulators is not only in the value of resistivity, but also in the following properties of conductive properties.

    (1) Doping characteristics When a small amount of impurities are doped into a pure semiconductor, the resistivity thereof greatly changes, thereby significantly changing the conductivity of the semiconductor. For example, when the concentration of phosphorus impurities in pure silicon is changed within the range of 10^19~10^26m^-3, its resistivity will change from 10^4 Ω·m to 10-5 Ω·m; When one millionth of boron is blended in pure silicon, the resistivity of silicon is reduced from 2.14×10^3 Ω·m to about 0.004 Ω·m. By incorporating different types of impurities into the same material, semiconductor materials of different conductivity types can be obtained.

    (2) Temperature characteristics Temperature can significantly change the electrical conductivity of semiconductor materials. In general, the conductivity of a semiconductor increases rapidly with increasing temperature, that is, the resistivity of a semiconductor has a negative temperature coefficient. For example, if the temperature of germanium is raised from 200 ° C to 300 ° C, the resistivity will be reduced by about half.

    (3) Environmental characteristics The conductivity of semiconductors also changes with illumination, that is, photoconductivity. In addition, some special semiconductors also change their resistivity under the action of electric and magnetic fields.

    Under this characteristic, within a certain range of temperature rise, the amount of electricity that the solar panel transmits to the battery is more sufficient. It is thus known that we should place the solar panels at a relatively high temperature. But it can't be directly in direct sunlight. There are other precautions regarding the placement of solar panels. Longxing Industrial provides you with the most economical solar lights. For more information on solar energy use, please see Solar Technology.

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