How solar energy is produced
The main principle of solar cell is through the use of semiconductor materials, P type semiconductor N type semiconductor in thin thick on the surface of the device when the photon strikes, joint surface of semiconductor N type P and the electron diffusion current is generated, the upper and lower ends of the metal conductor current leads to use.
The most abundant cosmic energy is inexhaustible solar energy, space solar power station is to maximize the use of solar energy. The upper left of the large object is the solar energy directly into electrical energy device. This device is usually scattered into a thin layer of boron diffusion method in N type single crystal silicon chips. In order to get the PN junction, coupled with the electrode. When direct sunlight to the level of the thin electrode, the polarization between the generated EMF. The basic way of solar power generation has two kinds, one is the sun photoelectric transfer directly into electrical energy, known as the "light power"; one is gather solar energy, produce high temperature, then convert heat to electricity, known as the "thermal power generation". At present, the light power device widely used is the "solar battery board", the "solar panel" has been widely used in satellites and other space objects.
Solar energy is the most important energy of the earth, but most of its energy can not reach the earth's surface through the earth's atmosphere
Solar energy with its reserves quotinfinityquot, universality of the development and utilization of clean and gradually reveal the economic advantages, its development and utilization is the final solution to conventional energy sources especially effective way of energy shortage, environmental pollution and greenhouse effect and other issues, is a kind of ideal alternative energy at present, the technology advances, the development and utilization of solar energy and its application in 1997, the global solar battery sales increased by 40%, to become the world's fastest growing energy. Solar water heater has formed industry, because of its excellent performance and price ratio unceasingly, gas water heater market; solar thermal power stations have been commercialized, is the hope of the large-scale solar power plants; the development of photovoltaic technology faster, in improving the photoelectric conversion efficiency and light battery manufacturing costs continue Decline as well as the advent of new types of solar cells
